/* ════════════════════════════════════════════════════════════════════════════
   SaturnOS — App stylesheet
   Built for production. Tokens → Layout → Components → States → Responsive
═════════════════════════════════════════════════════════════════════════════ */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
button { background: none; border: none; cursor: pointer; color: inherit; font: inherit; }
input, textarea { font: inherit; color: inherit; }
a { color: inherit; }

/* ── Tokens ── */

/* Global visibility utility — JS toggles this class throughout the app */
.hidden { display: none !important; }

:root {
  --bg: #000;
  --sidebar-bg: #0a0a0a;
  --surface: #111111;
  --surface-1: #161616;
  --surface-2: #1c1c1c;
  --surface-3: #242424;
  --border: rgba(255,255,255,0.07);
  --border-strong: rgba(255,255,255,0.12);
  --border-hover: rgba(255,255,255,0.18);
  --text: #ffffff;
  --text-2: rgba(255,255,255,0.78);
  --text-dim: rgba(255,255,255,0.55);
  --text-faint: rgba(255,255,255,0.32);
  --text-mute: rgba(255,255,255,0.18);
  --accent: #e3172f;
  --accent-hover: #ff2640;
  --accent-soft: rgba(227,23,47,0.12);
  --accent-glow: rgba(227,23,47,0.5);
  --danger: #ef4444;
  --warn: #f59e0b;
  --success: #22c55e;
  --sidebar-w: 264px;
  --sidebar-collapsed-w: 56px;
  --topbar-h: 48px;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.04);
  --shadow-popover: 0 8px 32px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.06);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --t-fast: 120ms;
  --t-base: 180ms;
  --t-slow: 280ms;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);

  /* Density (overridden by [data-density]) */
  --msg-py: 12px;
  --msg-gap: 14px;
}

[data-density="compact"]  { --msg-py: 6px;  --msg-gap: 10px; }
[data-density="cozy"]     { --msg-py: 12px; --msg-gap: 14px; }
[data-density="spacious"] { --msg-py: 22px; --msg-gap: 18px; }

[data-animations="off"] *,
[data-animations="off"] *::before,
[data-animations="off"] *::after {
  animation-duration: 0s !important;
  transition-duration: 0s !important;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Accessibility helpers ── */
.skip-link {
  position: absolute; top: -100px; left: 12px; z-index: 100000;
  background: var(--surface); color: var(--text); padding: 8px 12px;
  border-radius: var(--radius); border: 1px solid var(--border-strong);
  text-decoration: none; font-size: 0.85rem;
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection { background: rgba(227,23,47,0.35); color: white; }

/* ── Unified scrollbar styling (applies to every scrollable surface) ── */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.14) transparent;
}
*::-webkit-scrollbar {
  width: 8px; height: 8px;
}
*::-webkit-scrollbar-track {
  background: transparent;
}
*::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.10);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: content-box;
  transition: background 150ms;
}
*::-webkit-scrollbar-thumb:hover {
  background: rgba(227,23,47,0.45);
  background-clip: content-box;
}
*::-webkit-scrollbar-thumb:active {
  background: rgba(227,23,47,0.65);
  background-clip: content-box;
}
*::-webkit-scrollbar-corner { background: transparent; }
/* Hide scrollbars in non-scrolling areas (textarea composer) */
.composer-input::-webkit-scrollbar { width: 4px; height: 4px; }
.composer-input { scrollbar-width: thin; }

/* ════════════════════════════════════════════════════════════════════════════
   LAYOUT
═════════════════════════════════════════════════════════════════════════════ */
.shell {
  display: flex;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

/* ── Starfield (welcome only) ── */
.starfield-wrap {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
  transition: opacity 600ms var(--ease);
}
.starfield-wrap.dimmed { opacity: 0.08; }
.starfield {
  width: 100%; height: 100%;
}

/* ════════════════════════════════════════════════════════════════════════════
   SIDEBAR
═════════════════════════════════════════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--t-base) var(--ease);
  border-right: 1px solid var(--border);
  position: relative;
  z-index: 10;
}
.sidebar.collapsed {
  width: var(--sidebar-collapsed-w);
}

/* Top: brand row */
.sidebar-top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 10px 6px;
  flex-shrink: 0;
  min-height: 50px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  overflow: hidden; cursor: pointer;
  padding: 4px 6px; margin-left: -2px;
  border-radius: var(--radius); transition: background var(--t-fast);
}
.brand:hover { background: var(--surface); }
.brand-icon { width: 26px; height: 26px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.brand-name {
  font-weight: 700; font-size: 0.92rem; letter-spacing: -0.01em;
  white-space: nowrap; overflow: hidden;
  transition: opacity var(--t-fast);
}
.sidebar.collapsed .brand-name { opacity: 0; pointer-events: none; }
.sidebar.collapsed .brand { padding: 4px; }

/* Icon button (used in many spots) */
.icon-btn {
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-faint);
  border-radius: var(--radius-sm);
  transition: background var(--t-fast), color var(--t-fast);
  flex-shrink: 0;
}
.icon-btn:hover { background: var(--surface); color: var(--text-dim); }
.icon-btn:active { transform: scale(0.94); }

.sidebar-toggle { transition: transform var(--t-base) var(--ease), background var(--t-fast); }
.sidebar.collapsed .sidebar-toggle { transform: rotate(180deg); }

/* New Thread */
.new-thread-btn {
  margin: 4px 8px 6px;
  padding: 8px 10px 8px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-2);
  font-size: 0.83rem;
  font-weight: 500;
  text-align: left;
  display: flex; align-items: center; gap: 9px;
  overflow: hidden; flex-shrink: 0;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
  position: relative;
}
.new-thread-btn:hover {
  background: var(--surface);
  border-color: var(--border-hover);
  color: var(--text);
}
.new-thread-btn .btn-icon { color: var(--accent); display: flex; }
.btn-label { flex: 1; white-space: nowrap; overflow: hidden; transition: opacity var(--t-fast); }
.kbd-hint {
  font-family: var(--font);
  font-size: 0.64rem;
  font-weight: 600;
  color: var(--text-mute);
  letter-spacing: 0.04em;
  flex-shrink: 0;
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: opacity var(--t-fast);
}
.sidebar.collapsed .btn-label,
.sidebar.collapsed .kbd-hint { opacity: 0; pointer-events: none; }
.sidebar.collapsed .new-thread-btn { justify-content: center; padding: 8px; gap: 0; }

/* Search */
.sidebar-search-wrap {
  margin: 4px 8px 6px;
  position: relative;
  display: flex; align-items: center;
  flex-shrink: 0;
  transition: opacity var(--t-fast);
}
.sidebar.collapsed .sidebar-search-wrap { opacity: 0; pointer-events: none; }
.search-icon {
  position: absolute; left: 10px;
  color: var(--text-faint);
  display: flex; pointer-events: none;
}
.sidebar-search {
  width: 100%;
  padding: 7px 38px 7px 30px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.82rem;
  outline: none;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.sidebar-search:hover { border-color: var(--border-hover); }
.sidebar-search:focus { border-color: var(--border-strong); background: var(--surface-1); }
.sidebar-search::placeholder { color: var(--text-faint); }
.search-kbd {
  position: absolute; right: 6px;
  font-size: 0.62rem;
  background: rgba(255,255,255,0.05);
}

/* Nav */
.sidebar-nav {
  flex-shrink: 0;
  padding: 4px 0 4px;
}
.module-btn {
  display: flex; align-items: center; gap: 10px;
  width: calc(100% - 16px);
  margin: 1px 8px;
  padding: 7px 10px;
  color: var(--text-2);
  font-size: 0.86rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-align: left;
  transition: background var(--t-fast), color var(--t-fast);
  white-space: nowrap; overflow: hidden;
  position: relative;
}
.module-btn:hover { background: var(--surface); color: var(--text); }
.module-btn.active {
  background: rgba(227,23,47,0.10);
  color: var(--text);
}
.module-btn.active::before {
  content: ""; position: absolute; left: 0; top: 6px; bottom: 6px;
  width: 2px; background: var(--accent); border-radius: 2px;
}
.mod-icon { flex-shrink: 0; opacity: 0.85; display: flex; }
.mod-label { overflow: hidden; transition: opacity var(--t-fast); }
.sidebar.collapsed .mod-label { opacity: 0; pointer-events: none; }
.sidebar.collapsed .module-btn { justify-content: center; padding: 8px; gap: 0; }

/* ════════════════════════════════════════════════════════════════════════════
   THREAD LIST
═════════════════════════════════════════════════════════════════════════════ */
.sidebar-threads {
  flex: 1; min-height: 0;
  overflow-y: auto; overflow-x: hidden;
  padding: 6px 0 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.10) transparent;
}
.sidebar-threads::-webkit-scrollbar { width: 4px; }
.sidebar-threads::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1); border-radius: 4px;
}

.thread-group-label {
  padding: 10px 14px 4px;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
  transition: opacity var(--t-fast);
}
.sidebar.collapsed .thread-group-label { opacity: 0; height: 0; padding: 0 14px; pointer-events: none; }

/* Thread row — wrapper with hover-revealed actions */
.thread-row {
  position: relative;
  margin: 1px 6px;
}
.thread-btn {
  display: flex; align-items: center; gap: 8px;
  width: 100%;
  padding: 7px 8px 7px 10px;
  color: var(--text-2);
  font-size: 0.83rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-align: left;
  white-space: nowrap; overflow: hidden;
  transition: background var(--t-fast), color var(--t-fast);
  cursor: pointer;
}
.thread-btn:hover { background: var(--surface); color: var(--text); }
.thread-btn.active {
  background: var(--surface-1);
  color: var(--text);
}
.thread-btn.active::before {
  content: ""; position: absolute; left: -6px; top: 6px; bottom: 6px;
  width: 2px; background: var(--accent); border-radius: 2px;
}
.thread-title {
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis;
}
.thread-tool-dot {
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  opacity: 0.85;
}
.thread-pin {
  display: flex; opacity: 0.6;
  flex-shrink: 0;
}

/* Hover-revealed action button */
.thread-actions {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 1px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-fast);
  /* Default fade matches non-active hover bg (--surface) */
  background: linear-gradient(to right, transparent 0%, var(--surface) 30%, var(--surface) 100%);
  padding-left: 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.thread-row:hover .thread-actions,
.thread-row.menu-open .thread-actions {
  opacity: 1; pointer-events: auto;
}
/* When the row is active, the underlying bg is --surface-1, match it */
.thread-row:has(.thread-btn.active) .thread-actions {
  background: linear-gradient(to right, transparent 0%, var(--surface-1) 30%, var(--surface-1) 100%);
}
/* Always-visible on touch devices (no hover capability) */
@media (hover: none) {
  .thread-actions { opacity: 1; pointer-events: auto; background: transparent; padding-left: 8px; }
  .msg-actions    { opacity: 1; }
}
.thread-action-btn {
  width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-dim);
  border-radius: 5px;
  transition: background var(--t-fast), color var(--t-fast);
}
.thread-action-btn:hover { background: var(--surface-3); color: var(--text); }
.thread-action-btn.delete:hover { background: rgba(239,68,68,0.15); color: var(--danger); }
.sidebar.collapsed .thread-row { display: none; }

.thread-empty {
  padding: 14px 14px 8px;
  color: var(--text-faint);
  font-size: 0.78rem;
  line-height: 1.5;
}
.thread-empty kbd {
  background: var(--surface-1);
  padding: 1px 5px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 0.7rem;
}
.sidebar.collapsed .thread-empty { display: none; }

/* Inline rename input */
.thread-rename-input {
  width: 100%;
  padding: 7px 8px 7px 10px;
  background: var(--surface-2);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.83rem;
  font-weight: 500;
  outline: none;
}

/* ════════════════════════════════════════════════════════════════════════════
   SIDEBAR FOOTER
═════════════════════════════════════════════════════════════════════════════ */
.sidebar-footer {
  flex-shrink: 0;
  padding: 6px 8px 12px;
  border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 4px;
}
.footer-link {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 10px;
  color: var(--text-dim);
  font-size: 0.83rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-align: left;
  transition: background var(--t-fast), color var(--t-fast);
  white-space: nowrap; overflow: hidden;
}
.footer-link svg { flex-shrink: 0; }
.footer-link span:nth-child(2) { flex: 1; transition: opacity var(--t-fast); }
.footer-link:hover { background: var(--surface); color: var(--text); }
.sidebar.collapsed .footer-link span,
.sidebar.collapsed .footer-link kbd { opacity: 0; pointer-events: none; }
.sidebar.collapsed .footer-link { justify-content: center; padding: 8px; gap: 0; }
.sidebar.collapsed .footer-link span:nth-child(2) { display: none; }

.early-access-cta {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 11px;
  margin-top: 4px;
  background: linear-gradient(135deg, rgba(227,23,47,0.14) 0%, rgba(255,38,64,0.06) 100%);
  border: 1px solid rgba(227,23,47,0.28);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  overflow: hidden;
}
.early-access-cta:hover {
  background: linear-gradient(135deg, rgba(227,23,47,0.24) 0%, rgba(255,38,64,0.14) 100%);
  border-color: rgba(227,23,47,0.50);
  transform: translateY(-1px);
}
.ea-icon {
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(227,23,47,0.20);
  border-radius: 7px;
  color: var(--accent);
  flex-shrink: 0;
}
.ea-label { overflow: hidden; transition: opacity var(--t-fast); }
.ea-label strong { display: block; font-size: 0.81rem; font-weight: 600; white-space: nowrap; line-height: 1.3; }
.ea-label span { font-size: 0.7rem; color: var(--text-dim); white-space: nowrap; line-height: 1.3; }
.sidebar.collapsed .ea-label { opacity: 0; pointer-events: none; }
.sidebar.collapsed .early-access-cta { justify-content: center; padding: 9px; }

.auth-widget {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.auth-user-button {
  min-height: 34px;
  display: flex;
  align-items: center;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.03);
}
.auth-signin-btn {
  width: 100%;
  border: 1px solid var(--border);
}
.auth-sync-state {
  padding: 0 10px 4px;
  color: var(--text-faint);
  font-size: 0.68rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar.collapsed .auth-user-button {
  justify-content: center;
  padding: 4px;
  border-color: transparent;
  background: transparent;
}
.sidebar.collapsed .auth-sync-state { display: none; }
.sidebar.collapsed .auth-signin-btn span { display: none; }



/* ════════════════════════════════════════════════════════════════════════════
   MAIN AREA
═════════════════════════════════════════════════════════════════════════════ */
.main {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  overflow: hidden;
  background: var(--bg);
  position: relative;
}
.topbar {
  display: none;
  align-items: center;
  height: var(--topbar-h);
  padding: 0 8px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 5;
}
.topbar-menu { width: 36px; height: 36px; }
.topbar-title {
  flex: 1;
  font-size: 0.88rem;
  font-weight: 600;
  text-align: center;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  padding: 0 6px;
}
.topbar-actions { display: flex; align-items: center; gap: 4px; min-width: 36px; }
.topbar-auth {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  min-height: 32px;
}

/* Welcome */
.welcome {
  flex: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 32px 24px 80px;
  gap: 32px;
  overflow-y: auto;
}
.welcome-logo { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.welcome-mark {
  width: 76px; height: 76px;
  display: flex; align-items: center; justify-content: center;
  filter: drop-shadow(0 0 22px rgba(227,23,47,0.5)) drop-shadow(0 0 56px rgba(227,23,47,0.18));
}
.welcome-title {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(180deg, #ffffff 60%, rgba(255,255,255,0.65) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.welcome-sub { font-size: 0.92rem; color: var(--text-dim); max-width: 360px; }

/* Composer */
.composer-wrap {
  width: 100%;
  max-width: 720px;
  display: flex; flex-direction: column; gap: 8px;
}
.chat-composer-wrap {
  position: relative;
  flex-shrink: 0;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 20px 20px;
}
.composer {
  display: flex; align-items: flex-end; gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 6px 6px 6px 12px;
  transition: border-color var(--t-fast), background var(--t-fast), box-shadow var(--t-fast);
}
.composer:focus-within {
  border-color: var(--border-hover);
  background: var(--surface-1);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.02);
}
.composer-hint {
  font-size: 0.68rem;
  color: var(--text-mute);
  text-align: center;
  letter-spacing: 0.02em;
}
.composer-hint kbd {
  background: var(--surface-1);
  padding: 1px 5px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 0.64rem;
  font-family: var(--font);
}

.attach-btn {
  width: 30px; height: 30px;
  color: var(--text-faint);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background var(--t-fast), color var(--t-fast);
  margin-bottom: 2px;
}
.attach-btn:hover { background: var(--surface-2); color: var(--text-dim); }

/* Attachment chips above composer */
.attachment-strip {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 6px 4px 8px;
}
.attachment-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 8px 4px 4px;
  background: var(--surface-1);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  max-width: 220px;
  font-size: 0.78rem;
}
.attachment-chip img {
  width: 28px; height: 28px;
  object-fit: cover;
  border-radius: 50%;
  flex-shrink: 0;
}
.attachment-name {
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--text-2);
}
.attachment-remove {
  width: 18px; height: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent; border: none;
  color: var(--text-faint);
  cursor: pointer; border-radius: 50%;
  font-size: 1rem; line-height: 1;
  transition: background var(--t-fast), color var(--t-fast);
}
.attachment-remove:hover { background: var(--surface-3); color: var(--text); }

/* Drag-over state on composer */
.composer.drag-over {
  border-color: var(--accent) !important;
  background: rgba(227,23,47,0.05) !important;
}

/* Inline message attachments */
.msg-attachments {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 8px;
}
.msg-attachments .msg-attachment {
  display: block;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  overflow: hidden;
  max-width: 280px;
  transition: border-color var(--t-fast), transform var(--t-fast);
}
.msg-attachments .msg-attachment:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.msg-attachments img {
  display: block;
  max-width: 100%;
  max-height: 220px;
  object-fit: cover;
}
.msg.user .msg-attachments { justify-content: flex-end; }

.composer-input {
  flex: 1;
  background: none; border: none; outline: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  line-height: 1.55;
  resize: none;
  min-height: 26px;
  max-height: 220px;
  padding: 5px 0;
  scrollbar-width: thin;
}
.composer-input::-webkit-scrollbar { width: 4px; }
.composer-input::placeholder { color: var(--text-faint); }

.composer-right {
  display: flex; align-items: center; gap: 4px;
  flex-shrink: 0; margin-bottom: 2px;
}

.send-btn, .stop-btn {
  width: 32px; height: 32px;
  border-radius: 50%;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background var(--t-fast), transform var(--t-fast), opacity var(--t-fast);
  border: none;
  cursor: pointer;
}
.send-btn { background: var(--accent); }
.send-btn:hover { background: var(--accent-hover); }
.send-btn:active { transform: scale(0.92); }
.send-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }
.send-btn svg { width: 14px; height: 14px; }
.stop-btn { background: var(--text-2); color: #000; }
.stop-btn:hover { background: #fff; }
.stop-btn:active { transform: scale(0.92); }

/* Quick actions */
.welcome-quick {
  display: flex; flex-wrap: wrap; gap: 8px;
  justify-content: center;
  max-width: 640px;
}
.quick-btn {
  padding: 7px 14px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 18px;
  color: var(--text-2);
  font-size: 0.8rem;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.quick-btn:hover {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}
.quick-btn:active { transform: translateY(0); }
.quick-btn-launchpad {
  background: var(--accent-soft);
  border-color: rgba(227,23,47,0.3);
  color: var(--text);
  display: inline-flex; align-items: center; gap: 6px;
}
.quick-btn-launchpad:hover { background: rgba(227,23,47,0.18); border-color: rgba(227,23,47,0.5); }
.quick-btn-launchpad svg { color: var(--accent); }

/* Tool example chips — different style so they read as "examples" not actions */
.tool-examples-label {
  width: 100%;
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.quick-btn.tool-example {
  text-align: left;
  background: rgba(255,255,255,0.025);
  border-color: var(--border);
  font-size: 0.78rem;
  color: var(--text-2);
  max-width: 100%;
  white-space: normal;
  line-height: 1.4;
  padding: 8px 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
}
.quick-btn.tool-example::before {
  content: "›";
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
  margin-right: 2px;
  flex-shrink: 0;
  opacity: 0.7;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.quick-btn.tool-example:hover {
  background: rgba(227,23,47,0.06);
  border-color: rgba(227,23,47,0.25);
  color: var(--text);
}
.quick-btn.tool-example:hover::before {
  opacity: 1;
  transform: translateX(2px);
}

/* Chat */
.chat-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.chat-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  /* Center content aligned with messages (max-width 800px) */
  padding: 11px max(22px, calc((100% - 800px) / 2 + 22px));
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  min-height: 50px;
}
.chat-header-main { flex: 1; min-width: 0; display: flex; align-items: center; gap: 8px; }
.chat-header-title {
  font-size: 0.92rem;
  font-weight: 600;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.chat-header-meta {
  font-size: 0.7rem;
  color: var(--text-faint);
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-radius: 4px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}
.chat-header-meta:empty { display: none; }
.chat-header-meta.tool-meta {
  color: var(--accent);
  border-color: rgba(227,23,47,0.3);
  background: rgba(227,23,47,0.06);
}
.chat-header-actions { display: flex; gap: 4px; flex-shrink: 0; }

.header-action-btn {
  padding: 5px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 0.78rem;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  cursor: pointer;
  font-family: var(--font);
}
.header-action-btn:hover { background: var(--surface); color: var(--text); border-color: var(--border-hover); }
.header-action-btn.icon-only {
  width: 28px; height: 28px;
  padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
}

.chat-tool-icon { width: 22px; height: 22px; flex-shrink: 0; }
.chat-tool-icon svg { width: 100%; height: 100%; }

/* Messages */
.messages {
  flex: 1; min-height: 0;
  overflow-y: auto;
  padding: 16px 0 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
  scroll-behavior: smooth;
}
.messages::-webkit-scrollbar { width: 6px; }
.messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
.messages::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

.msg {
  display: flex;
  gap: var(--msg-gap);
  padding: var(--msg-py) 22px;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  animation: msgIn 280ms var(--ease) both;
}
@keyframes msgIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.msg.user { flex-direction: row-reverse; }

.msg-avatar {
  width: 32px; height: 32px;
  flex-shrink: 0;
  margin-top: 2px;
  display: flex; align-items: center; justify-content: center;
}
.msg.assistant .msg-avatar {
  background: transparent;
  border: none;
  filter: drop-shadow(0 0 8px rgba(227,23,47,0.45)) drop-shadow(0 0 18px rgba(227,23,47,0.18));
}
.msg.assistant .msg-avatar svg { width: 100%; height: 100%; }
.msg.thinking .msg-avatar { filter: none; }
.msg-body { max-width: calc(100% - 44px); min-width: 0; }

.agent-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 5px;
  padding: 1px 6px;
  background: rgba(227,23,47,0.08);
  border: 1px solid rgba(227,23,47,0.2);
  border-radius: 4px;
}

.msg-content {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text);
  word-break: break-word;
}
.msg.user .msg-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px 16px 4px 16px;
  padding: 10px 14px;
  display: inline-block;
  white-space: pre-wrap;
}
.msg-content p { margin: 0 0 0.7em; white-space: pre-wrap; }
.msg-content p:last-child { margin-bottom: 0; }
.msg-content h1, .msg-content h2, .msg-content h3, .msg-content h4 {
  font-weight: 700; letter-spacing: -0.01em; line-height: 1.3;
  margin: 1em 0 0.4em;
}
.msg-content h1 { font-size: 1.35rem; }
.msg-content h2 { font-size: 1.18rem; }
.msg-content h3 { font-size: 1.05rem; }
.msg-content h4 { font-size: 0.95rem; }
.msg-content ul, .msg-content ol { margin: 0 0 0.8em 1.4em; padding: 0; }
.msg-content li { margin: 0.25em 0; line-height: 1.6; }
.msg-content strong { font-weight: 700; }
.msg-content em { font-style: italic; opacity: 0.95; }
.msg-content a { color: var(--accent-hover); text-decoration: underline; text-decoration-color: rgba(255,38,64,0.3); text-underline-offset: 2px; }
.msg-content a:hover { text-decoration-color: var(--accent-hover); }
.msg-content blockquote {
  border-left: 3px solid var(--accent);
  background: rgba(227,23,47,0.05);
  padding: 8px 14px;
  margin: 0.6em 0;
  color: var(--text-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.msg-content hr { border: none; border-top: 1px solid var(--border); margin: 1em 0; }
.msg-content :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface-1);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  color: #ffb4be;
}

.artifact-stream-placeholder {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  color: var(--text-2);
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
}
.artifact-spinner {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.14);
  border-top-color: var(--accent);
  animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.code-block {
  position: relative;
  background: #0c0c0c;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 0.7em 0;
  overflow: hidden;
}
/* Visual preview block (svg/html) — HTML can auto-size; SVG animation previews stay fitted. */
.code-block.has-preview .preview-frame-wrap {
  background: linear-gradient(180deg, #111 0%, #0a0a0a 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  display: flex; align-items: stretch;
  overflow: hidden;
  min-height: 200px;
  max-height: 640px;
  height: 280px;
  transition: height 200ms var(--ease);
}
.code-block.has-preview .preview-frame-wrap-svg {
  min-height: 320px;
  height: auto;
  max-height: none;
}
.code-block.has-preview .preview-frame {
  width: 100%;
  height: 100%;
  border: 0;
  background: transparent;
  display: block;
}
.code-block.has-preview .preview-frame-svg {
  overflow: hidden;
}
@media (max-width: 700px) {
  .code-block.has-preview .preview-frame-wrap-svg {
    min-height: 240px;
    height: auto;
  }
}
.code-block.has-preview .code-block-actions {
  display: flex; gap: 6px; align-items: center;
}
.code-block.has-preview .code-toggle {
  padding: 3px 9px;
  font-size: 0.7rem;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  font-family: var(--font);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.code-block.has-preview .code-toggle:hover {
  background: var(--surface-2); color: var(--text); border-color: var(--border-hover);
}
.code-block.has-preview pre.code-source-collapsed {
  max-height: 0;
  padding: 0;
  overflow: hidden;
  transition: max-height 200ms ease, padding 200ms ease;
}
.code-block.has-preview pre:not(.code-source-collapsed) {
  max-height: 380px;
  padding: 12px 14px;
  overflow: auto;
  transition: max-height 200ms ease, padding 200ms ease;
}
.code-block-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 10px 6px 12px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}
.code-lang {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  text-transform: lowercase;
  letter-spacing: 0.05em;
}
.code-copy {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 8px;
  font-size: 0.7rem;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 5px;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  cursor: pointer;
  font-family: var(--font);
}
.code-copy:hover { background: var(--surface-2); color: var(--text); border-color: var(--border-hover); }
.code-copy.copied { color: var(--success); border-color: rgba(34,197,94,0.4); }
.code-block pre {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  color: #e6e6e6;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.code-block pre::-webkit-scrollbar { height: 6px; }
.code-block pre::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
[data-wrap-code="on"] .code-block pre { white-space: pre-wrap; word-break: break-word; }

.msg-actions {
  display: flex; gap: 2px;
  margin-top: 6px;
  opacity: 0;
  transition: opacity var(--t-fast);
}
.msg:hover .msg-actions,
.msg:focus-within .msg-actions { opacity: 1; }
.msg.user .msg-actions { justify-content: flex-end; }
.msg-action {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px;
  font-size: 0.7rem;
  color: var(--text-faint);
  border-radius: 5px;
  transition: background var(--t-fast), color var(--t-fast);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font);
}
.msg-action:hover { background: var(--surface-1); color: var(--text-2); }
.msg-action.copied { color: var(--success); }
.msg-action svg { flex-shrink: 0; }

.msg-edit {
  width: 100%;
  background: var(--surface-1);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--text);
  padding: 10px 12px;
  font-family: var(--font);
  font-size: 0.92rem;
  line-height: 1.6;
  resize: vertical;
  min-height: 60px;
  outline: none;
}
.msg-edit-actions {
  display: flex; gap: 6px;
  margin-top: 8px;
  justify-content: flex-end;
}

/* Thinking — quality animation, no fake progress cycling */
.thinking-indicator {
  display: flex; align-items: center; gap: 12px;
  padding: 4px 0;
}
.thinking-planet {
  width: 32px; height: 32px;
  flex-shrink: 0;
  animation: thinking-breathe 2.4s ease-in-out infinite;
  transform-origin: 50% 50%;
}
@keyframes thinking-breathe {
  0%, 100% { transform: scale(0.96); filter: drop-shadow(0 0 6px rgba(227,23,47,0.45)); }
  50%      { transform: scale(1.06); filter: drop-shadow(0 0 14px rgba(227,23,47,0.75)) drop-shadow(0 0 26px rgba(227,23,47,0.25)); }
}
.thinking-planet .t-planet {
  animation: thinking-planet-glow 2.4s ease-in-out infinite;
  transform-origin: 50% 50%;
}
@keyframes thinking-planet-glow {
  0%, 100% { fill: #c9152a; }
  50%      { fill: #ff2640; }
}
.thinking-planet .t-orbiter-grp {
  transform-origin: 22px 22px;
  animation: thinking-orbit 2.6s linear infinite;
}
@keyframes thinking-orbit {
  to { transform: rotate(360deg); }
}
.thinking-planet .t-orbiter {
  animation: thinking-orbiter-fade 2.6s ease-in-out infinite;
}
@keyframes thinking-orbiter-fade {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}
.thinking-label {
  font-size: 0.86rem;
  color: var(--text-dim);
  display: inline-flex; align-items: baseline;
}
.thinking-dots {
  display: inline-flex; gap: 2px;
  margin-left: 2px;
  align-items: baseline;
}
.thinking-dots i {
  display: inline-block;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--text-dim);
  animation: thinking-dot 1.4s ease-in-out infinite;
}
.thinking-dots i:nth-child(2) { animation-delay: 0.18s; }
.thinking-dots i:nth-child(3) { animation-delay: 0.36s; }
@keyframes thinking-dot {
  0%, 80%, 100% { opacity: 0.2; transform: translateY(0); }
  40%           { opacity: 1;   transform: translateY(-2px); }
}

.streaming::after {
  content: "▎";
  display: inline-block;
  margin-left: 2px;
  color: var(--accent);
  animation: caretBlink 1.05s steps(2, start) infinite;
  font-weight: 100;
}
@keyframes caretBlink { to { visibility: hidden; } }

.scroll-bottom-btn {
  position: absolute;
  right: 30px;
  top: -40px;
  width: 32px; height: 32px;
  background: var(--surface-1);
  color: var(--text-2);
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.5);
  transition: opacity var(--t-fast), transform var(--t-fast);
  z-index: 4;
  cursor: pointer;
}
.scroll-bottom-btn:hover { background: var(--surface-2); color: var(--text); }

.msg-error {
  padding: 10px 14px;
  border: 1px solid rgba(239,68,68,0.3);
  background: rgba(239,68,68,0.08);
  border-radius: var(--radius);
  color: #fca5a5;
  font-size: 0.86rem;
  display: flex; align-items: center; gap: 10px;
}
.msg-retry {
  padding: 4px 10px;
  background: rgba(239,68,68,0.15);
  color: #fca5a5;
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: 5px;
  font-size: 0.78rem;
  margin-left: auto;
  flex-shrink: 0;
  transition: background var(--t-fast);
  cursor: pointer;
  font-family: var(--font);
}
.msg-retry:hover { background: rgba(239,68,68,0.25); }

/* ════════════════════════════════════════════════════════════════════════════
   LAUNCHPAD / HOME
═════════════════════════════════════════════════════════════════════════════ */
.launchpad {
  flex: 1; min-height: 0;
  overflow-y: auto;
  padding: 36px 40px 40px;
  display: flex; flex-direction: column; gap: 24px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.launchpad::-webkit-scrollbar { width: 6px; }
.launchpad::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
.lp-header h2 {
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 6px;
}
.lp-header p { font-size: 0.88rem; color: var(--text-dim); margin-bottom: 14px; }
.lp-search-wrap {
  position: relative;
  max-width: 440px;
  display: flex; align-items: center;
}
.lp-search-wrap .search-icon { left: 12px; }
.lp-search {
  width: 100%;
  padding: 10px 14px 10px 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.lp-search:hover { border-color: var(--border-hover); }
.lp-search:focus { border-color: var(--border-strong); background: var(--surface-1); }
.lp-search::placeholder { color: var(--text-faint); }

.lp-grid { display: flex; flex-direction: column; gap: 22px; }
.lp-category-header {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding-left: 2px;
  margin-bottom: -4px;
}
.lp-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 10px;
}
.lp-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
  display: flex; flex-direction: column; gap: 4px;
}
.lp-card:hover {
  border-color: rgba(227,23,47,0.45);
  background: rgba(227,23,47,0.04);
  transform: translateY(-1px);
}
.lp-card:hover .lp-launch-hint { opacity: 1; }
.lp-card-icon { width: 28px; height: 28px; margin-bottom: 2px; flex-shrink: 0; }
.lp-card-icon svg { width: 100%; height: 100%; }
.lp-name { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.lp-desc { font-size: 0.77rem; color: var(--text-dim); line-height: 1.5; }
.lp-launch-hint {
  margin-top: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  opacity: 0;
  transition: opacity var(--t-fast);
}
.lp-card.launching {
  border-color: var(--accent) !important;
  background: rgba(227,23,47,0.08) !important;
  transform: scale(1.04);
  transition: transform 140ms var(--ease), border-color 100ms, background 100ms !important;
}

.launch-overlay {
  position: fixed; inset: 0;
  background: #000;
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  opacity: 0;
  transition: opacity 180ms var(--ease);
  pointer-events: none;
}
.launch-overlay.visible { opacity: 1; }
.launch-overlay-inner {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  opacity: 0;
  transform: translateY(14px) scale(0.93);
  transition: opacity 320ms var(--ease) 100ms, transform 320ms var(--ease) 100ms;
}
.launch-overlay.visible .launch-overlay-inner { opacity: 1; transform: translateY(0) scale(1); }
.launch-overlay-icon { width: 72px; height: 72px; filter: drop-shadow(0 0 28px rgba(227,23,47,0.6)); }
.launch-overlay-icon svg { width: 100%; height: 100%; }
.launch-overlay-name { font-size: 1.5rem; font-weight: 700; letter-spacing: 0.02em; }
.launch-overlay-sub {
  font-size: 0.75rem; color: var(--accent);
  letter-spacing: 0.18em; text-transform: uppercase;
  opacity: 0.8;
  animation: lo-sub-pulse 1s ease-in-out infinite;
}
@keyframes lo-sub-pulse { 0%, 100% { opacity: 0.5; } 50% { opacity: 1; } }

.welcome.tool-locked .welcome-mark {
  background: rgba(227,23,47,0.05);
  border: 1px solid rgba(227,23,47,0.2);
  border-radius: 18px;
  padding: 10px;
}
.welcome-tool-svg { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.welcome-tool-svg svg { width: 62%; height: 62%; filter: drop-shadow(0 0 18px rgba(227,23,47,0.45)); }
.chat-header.tool-locked {
  border-bottom-color: rgba(227,23,47,0.18);
  background: linear-gradient(180deg, rgba(227,23,47,0.025) 0%, transparent 100%);
}

/* Home composer — quick-start a new thread from Home */
.home-composer {
  display: flex; align-items: flex-end; gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 6px 6px 6px 12px;
  margin-bottom: 28px;
  max-width: 760px;
  transition: border-color var(--t-fast), background var(--t-fast), box-shadow var(--t-fast);
}
.home-composer:focus-within {
  border-color: var(--border-hover);
  background: var(--surface-1);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.02);
}
.home-composer.drag-over {
  border-color: var(--accent) !important;
  background: rgba(227,23,47,0.05) !important;
}
.home-section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 12px;
}
.home-section-label:empty { display: none; }

/* Home grid */
.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}
.home-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
  display: flex; flex-direction: column; gap: 4px;
  position: relative;
}
.home-card:hover {
  border-color: rgba(227,23,47,0.45);
  background: rgba(227,23,47,0.04);
  transform: translateY(-1px);
}
.home-card:hover .home-card-hint { opacity: 1; }
.home-card-icon { width: 26px; height: 26px; flex-shrink: 0; }
.home-card-icon svg { width: 100%; height: 100%; }
.home-card-title {
  font-size: 0.92rem; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-bottom: 2px;
}
.home-card-desc {
  font-size: 0.77rem;
  color: var(--text-dim);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.home-card-meta {
  margin-top: 6px;
  font-size: 0.7rem;
  color: var(--text-faint);
  display: flex; align-items: center; gap: 6px;
}
.home-card-hint {
  position: absolute; right: 12px; top: 12px;
  font-size: 0.72rem;
  color: var(--accent);
  opacity: 0;
  transition: opacity var(--t-fast);
  font-weight: 600;
}
.home-empty {
  color: var(--text-dim);
  font-size: 0.86rem;
  padding: 22px 2px;
  line-height: 1.6;
  max-width: 480px;
}

/* Context menu */
.context-menu {
  position: fixed;
  z-index: 1500;
  background: var(--surface-1);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 4px;
  min-width: 180px;
  box-shadow: var(--shadow-popover);
  animation: menuIn 140ms var(--ease) both;
}
@keyframes menuIn {
  from { opacity: 0; transform: translateY(-4px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.menu-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 7px 10px;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--radius-sm);
  text-align: left;
  transition: background var(--t-fast), color var(--t-fast);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font);
}
.menu-item:hover { background: var(--surface-3); color: var(--text); }
.menu-item.danger { color: #fca5a5; }
.menu-item.danger:hover { background: rgba(239,68,68,0.15); color: var(--danger); }
.menu-item svg { flex-shrink: 0; opacity: 0.85; }
.menu-item kbd {
  margin-left: auto;
  font-size: 0.66rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--text-faint);
  font-family: var(--font);
}
.menu-divider { height: 1px; background: var(--border); margin: 4px 6px; }

/* Command palette */
.palette-overlay {
  position: fixed; inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.45);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 12vh 16px 16px;
  animation: overlayIn 160ms var(--ease) both;
}
@keyframes overlayIn { from { opacity: 0; } to { opacity: 1; } }
.palette {
  width: 100%;
  max-width: 580px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: paletteIn 200ms var(--ease) both;
}
@keyframes paletteIn {
  from { opacity: 0; transform: translateY(-12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.palette-input-wrap {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.palette-icon { color: var(--text-faint); display: flex; flex-shrink: 0; }
.palette-input {
  flex: 1;
  background: transparent;
  border: none; outline: none;
  font-size: 1rem;
  color: var(--text);
  font-family: var(--font);
}
.palette-input::placeholder { color: var(--text-faint); }
.palette-esc {
  flex-shrink: 0;
  font-size: 0.66rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-faint);
  font-family: var(--font);
}
.palette-results {
  max-height: 50vh;
  overflow-y: auto;
  padding: 6px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.palette-results::-webkit-scrollbar { width: 4px; }
.palette-results::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
.palette-section-h {
  padding: 6px 10px 4px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.palette-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 8px 10px;
  font-size: 0.86rem;
  color: var(--text-2);
  border-radius: var(--radius-sm);
  text-align: left;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
  background: transparent;
  border: none;
  font-family: var(--font);
}
.palette-item:hover, .palette-item.selected {
  background: var(--surface-2);
  color: var(--text);
}
.palette-item-icon {
  width: 24px; height: 24px;
  flex-shrink: 0;
  color: var(--text-faint);
  display: flex; align-items: center; justify-content: center;
}
.palette-item-icon svg { width: 16px; height: 16px; }
.palette-item-text { flex: 1; min-width: 0; overflow: hidden; }
.palette-item-text strong { display: block; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.palette-item-text small { display: block; font-size: 0.74rem; color: var(--text-faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-top: 1px; }
.palette-empty {
  padding: 28px 16px;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.85rem;
}
.palette-footer {
  display: flex;
  gap: 14px;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  font-size: 0.7rem;
  color: var(--text-faint);
}
.palette-footer kbd {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 0.66rem;
  margin-right: 3px;
  font-family: var(--font);
}

/* ════════════════════════════════════════════════════════════════════════════
   MODALS / SETTINGS / TOASTS / RESPONSIVE
═════════════════════════════════════════════════════════════════════════════ */


/* ════════════════════════════════════════════════════════════════════════════
   MODALS / CONFIRM / SETTINGS
═════════════════════════════════════════════════════════════════════════════ */

.modal-overlay {
  position: fixed; inset: 0;
  z-index: 1900;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay.hidden { display: none; }

.modal {
  background: var(--surface-1);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%; max-width: 520px;
  max-height: 90vh;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.modal-sm { max-width: 380px; }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-header h3 { font-size: 1rem; font-weight: 700; letter-spacing: -0.01em; }

.modal-body {
  padding: 20px 22px 22px;
  overflow-y: auto;
  flex: 1;
}

/* Confirm dialog */
.confirm-title  { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.confirm-message { font-size: 0.875rem; color: var(--text-2); line-height: 1.55; margin-bottom: 20px; }
.confirm-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* Settings */
.settings-section { margin-bottom: 28px; }
.settings-section:last-child { margin-bottom: 0; }
.settings-section-h { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-faint); margin-bottom: 12px; }
.settings-row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.settings-row:last-child { border-bottom: none; }
.settings-label { font-size: 0.875rem; font-weight: 600; margin-bottom: 2px; }
.settings-desc  { font-size: 0.77rem; color: var(--text-dim); line-height: 1.5; }
.settings-actions { display: flex; gap: 8px; flex-shrink: 0; }
.settings-meta { font-size: 0.75rem; color: var(--text-faint); }
.settings-meta a { color: var(--text-dim); text-decoration: underline; text-underline-offset: 3px; }
.settings-meta a:hover { color: var(--text); }

/* Seg control (density picker) */
.seg-control { display: flex; gap: 2px; background: var(--surface-2); border-radius: var(--radius-sm); padding: 3px; }
.seg-btn {
  padding: 5px 12px; border-radius: 4px; font-size: 0.8rem; font-weight: 500;
  color: var(--text-dim); transition: all var(--t-fast);
}
.seg-btn.active { background: var(--surface-3); color: var(--text); font-weight: 600; }
.seg-btn:hover:not(.active) { color: var(--text-2); }

/* Toggle switch */
.switch { position: relative; display: inline-block; width: 36px; height: 20px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-slider {
  position: absolute; inset: 0; cursor: pointer;
  background: var(--surface-3); border-radius: 20px;
  transition: background var(--t-fast);
}
.switch-slider::before {
  content: ""; position: absolute;
  width: 14px; height: 14px; border-radius: 50%;
  left: 3px; top: 3px; background: var(--text-dim);
  transition: transform var(--t-fast), background var(--t-fast);
}
.switch input:checked + .switch-slider { background: var(--accent); }
.switch input:checked + .switch-slider::before { transform: translateX(16px); background: #fff; }

/* Keyboard shortcut list */
.kbd-list { display: flex; flex-direction: column; gap: 2px; }
.kbd-row { display: flex; align-items: center; justify-content: space-between; padding: 6px 0; font-size: 0.82rem; color: var(--text-2); }
.kbd-row kbd { background: var(--surface-2); border: 1px solid var(--border-strong); border-radius: 4px; padding: 2px 7px; font-size: 0.75rem; font-family: var(--font); color: var(--text-dim); }

/* ════════════════════════════════════════════════════════════════════════════
   TOAST NOTIFICATIONS
═════════════════════════════════════════════════════════════════════════════ */

.toast-stack {
  position: fixed; bottom: 20px; right: 20px;
  z-index: 2100;
  display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
  max-width: 360px; width: calc(100vw - 40px);
}
.toast {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 11px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  pointer-events: all;
  animation: toastIn 160ms var(--ease) both;
  font-size: 0.84rem; line-height: 1.45; color: var(--text-2);
}
.toast.leaving { animation: toastOut 200ms var(--ease) both; }
.toast.success { border-color: rgba(34,197,94,0.35); }
.toast.error   { border-color: rgba(239,68,68,0.35); }
.toast.info    { border-color: var(--border-strong); }
.toast-icon { flex-shrink: 0; width: 16px; height: 16px; margin-top: 1px; }
.toast-text { flex: 1; }
.toast-action { font-size: 0.8rem; font-weight: 600; color: var(--accent); background: none; border: none; cursor: pointer; padding: 0; flex-shrink: 0; }
.toast-close { flex-shrink: 0; opacity: 0.45; padding: 2px; transition: opacity var(--t-fast); }
.toast-close:hover { opacity: 1; }

@keyframes toastIn  { from { opacity: 0; transform: translateY(8px) scale(0.96); } to { opacity: 1; transform: none; } }
@keyframes toastOut { from { opacity: 1; transform: none; } to { opacity: 0; transform: translateY(4px) scale(0.97); } }

/* ════════════════════════════════════════════════════════════════════════════
   AUTH OVERLAY
═════════════════════════════════════════════════════════════════════════════ */

.auth-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.auth-overlay.hidden { display: none; }

.auth-panel {
  background: var(--surface-1);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 40px 36px;
  width: 100%; max-width: 400px;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  text-align: center;
}
.auth-mark { width: 52px; height: 52px; margin-bottom: 4px; filter: drop-shadow(0 0 20px rgba(227,23,47,0.45)); }
.auth-mark svg { width: 100%; height: 100%; }
.auth-title { font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; }
.auth-sub   { font-size: 0.875rem; color: var(--text-dim); line-height: 1.55; max-width: 280px; }
.auth-loading { display: flex; align-items: center; justify-content: center; padding: 16px 0; }
.auth-loading.hidden { display: none; }
#authSignInMount { width: 100%; }

/* ════════════════════════════════════════════════════════════════════════════
   SPINNER
═════════════════════════════════════════════════════════════════════════════ */

.spinner {
  display: inline-block;
  width: 18px; height: 18px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ════════════════════════════════════════════════════════════════════════════
   ATTACHMENT PREVIEWS
═════════════════════════════════════════════════════════════════════════════ */

.attach-previews {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 10px 14px 0;
}
.attach-preview-wrap { position: relative; }
.attach-preview-img {
  width: 56px; height: 56px;
  object-fit: cover; border-radius: 8px;
  border: 1px solid var(--border-strong);
  display: block;
}
.attach-preview-rm {
  position: absolute; top: -6px; right: -6px;
  width: 18px; height: 18px;
  background: var(--surface-3); border: 1px solid var(--border-strong);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; opacity: 0.8; transition: opacity var(--t-fast);
}
.attach-preview-rm:hover { opacity: 1; }

/* ════════════════════════════════════════════════════════════════════════════
   MESSAGE STATES — error, streaming
═════════════════════════════════════════════════════════════════════════════ */

.msg-error { color: var(--danger); font-size: 0.875rem; }
.error-row .msg-body { color: var(--danger); }

.msg.streaming .msg-body::after {
  content: "▋";
  display: inline-block;
  color: var(--accent);
  animation: blink 800ms step-end infinite;
  margin-left: 1px;
  font-size: 0.9em;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* ════════════════════════════════════════════════════════════════════════════
   HOME PANEL — thread card alias + body
═════════════════════════════════════════════════════════════════════════════ */

/* home-thread-card is the JS-emitted class — maps to home-card visuals */
.home-thread-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
  display: flex; gap: 12px; align-items: flex-start;
  text-align: left; width: 100%;
}
.home-thread-card:hover {
  border-color: rgba(227,23,47,0.45);
  background: rgba(227,23,47,0.04);
  transform: translateY(-1px);
}
.home-thread-card .home-card-icon { width: 24px; height: 24px; flex-shrink: 0; margin-top: 1px; }
.home-thread-card .home-card-icon svg { width: 100%; height: 100%; }
.home-card-body { flex: 1; min-width: 0; }
.home-card-title {
  font-size: 0.875rem; font-weight: 600; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-bottom: 3px;
}
.home-card-snippet {
  font-size: 0.775rem; color: var(--text-dim); line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}

/* ════════════════════════════════════════════════════════════════════════════
   SUGGESTION CHIPS
═════════════════════════════════════════════════════════════════════════════ */

.suggestion-chips {
  display: flex; flex-wrap: wrap; gap: 7px;
  margin-top: 12px;
}
.suggestion-chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 0.78rem; font-weight: 600; color: var(--text-2);
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
  white-space: nowrap;
}
.suggestion-chip:hover {
  border-color: var(--accent);
  color: var(--text);
  background: var(--accent-soft);
}
.suggestion-chip-icon { font-size: 0.85em; }

/* ════════════════════════════════════════════════════════════════════════════
   TYPOGRAPHY POLISH
═════════════════════════════════════════════════════════════════════════════ */

/* Stronger brand name */
.brand-name { font-weight: 800; font-size: 0.98rem; letter-spacing: -0.02em; }

/* Thread list */
.thread-row-title { font-weight: 600; }
.thread-group-label { font-weight: 700; font-size: 0.68rem; letter-spacing: 0.07em; text-transform: uppercase; }

/* Welcome screen */
.welcome-title { font-weight: 800; letter-spacing: -0.03em; }
.welcome-sub   { font-weight: 400; }

/* Chat message body — tighter, more readable */
.msg-body { font-size: 0.9rem; line-height: 1.65; }
.msg-body p { margin-bottom: 0.8em; }
.msg-body p:last-child { margin-bottom: 0; }
.msg-body strong { font-weight: 700; color: var(--text); }
.msg-body h1,.msg-body h2,.msg-body h3 { font-weight: 700; letter-spacing: -0.015em; margin: 1em 0 0.4em; }
.msg-body code { font-size: 0.83em; }

/* Topbar title bolder */
.topbar-title { font-weight: 700; letter-spacing: -0.01em; font-size: 0.9rem; }

/* Section labels in home/launchpad */
.lp-section-h { font-weight: 700; font-size: 0.72rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--text-faint); }

/* Quick action buttons */
.quick-btn { font-weight: 500; }

/* Settings labels */
.settings-label { font-weight: 600; }

/* Composer placeholder — more purposeful */
.composer-input::placeholder { color: var(--text-faint); font-weight: 400; font-style: italic; }

/* Auth info in sidebar */
.auth-sync-state { font-size: 0.73rem; font-weight: 500; }
.auth-signin-btn { font-weight: 600; }

/* ════════════════════════════════════════════════════════════════════════════
   RESPONSIVE — mobile overlay + modal fixes
═════════════════════════════════════════════════════════════════════════════ */

@media (max-width: 500px) {
  .modal { max-width: 100%; border-radius: var(--radius); }
  .modal-overlay { align-items: flex-end; padding: 0; }
  .modal { border-radius: var(--radius-lg) var(--radius-lg) 0 0; max-height: 95vh; }
  .auth-panel { padding: 32px 20px; border-radius: var(--radius-lg); }
  .toast-stack { bottom: 12px; right: 12px; left: 12px; max-width: none; width: auto; }
}

/* ════════════════════════════════════════════════════════════════════════════
   BUTTONS — polished globals
═════════════════════════════════════════════════════════════════════════════ */

.btn-primary {
  padding: 8px 16px; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff;
  font-size: 0.875rem; font-weight: 600;
  transition: background var(--t-fast), transform var(--t-fast);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }

.btn-ghost {
  padding: 7px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong); color: var(--text-2);
  font-size: 0.875rem; font-weight: 500;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.btn-ghost:hover { border-color: var(--border-hover); color: var(--text); }

.btn-danger {
  padding: 8px 16px; border-radius: var(--radius-sm);
  background: rgba(239,68,68,0.15); color: #ef4444;
  border: 1px solid rgba(239,68,68,0.3);
  font-size: 0.875rem; font-weight: 600;
  transition: background var(--t-fast);
}
.btn-danger:hover { background: rgba(239,68,68,0.25); }

/* ════════════════════════════════════════════════════════════════════════════
   VISUAL POLISH — launch-ready pass
═════════════════════════════════════════════════════════════════════════════ */

/* Welcome view — tighter centering, more breathing room */
.welcome-logo { gap: 16px; }
.welcome-mark {
  width: 82px; height: 82px;
  filter: drop-shadow(0 0 28px rgba(227,23,47,0.55)) drop-shadow(0 0 64px rgba(227,23,47,0.2));
}
.welcome-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.035em;
}
.welcome-sub {
  font-size: 0.9rem;
  max-width: 400px;
  line-height: 1.6;
}

/* Sidebar nav — make Home always first, cleaner active pill */
.sidebar-nav { padding: 6px 0 8px; border-bottom: 1px solid var(--border); margin-bottom: 4px; }
.module-btn {
  font-size: 0.84rem;
  font-weight: 500;
  padding: 6px 10px;
  gap: 9px;
}
.module-btn.active {
  background: rgba(227,23,47,0.08);
  color: var(--text);
  font-weight: 600;
}
.module-btn.active::before {
  top: 5px; bottom: 5px;
}
.mod-icon svg { opacity: 0.9; }
.module-btn.active .mod-icon svg { opacity: 1; color: var(--accent); }

/* Home panel — give it its own visual identity separate from launchpad */
#homePanel .lp-header h2 { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.025em; }
#homePanel .lp-header p  { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 20px; }
#homePanel .home-section-label { margin-top: 4px; }

/* Thread cards in home grid — slightly more padding, tighter radius */
.home-thread-card {
  border-radius: 10px;
  padding: 12px 14px;
  gap: 10px;
}
.home-thread-card:hover { transform: translateY(-1px); }
.home-card-title { font-size: 0.855rem; font-weight: 600; }
.home-card-snippet { font-size: 0.76rem; color: var(--text-faint); }

/* Home grid — tighter spacing */
.home-grid { gap: 8px; }

/* Suggestion chips — more polished */
.suggestion-chip {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 4px 11px;
  border-radius: 99px;
  border: 1px solid var(--border);
  color: var(--text-2);
  background: var(--surface);
  letter-spacing: 0.005em;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.suggestion-chip:hover {
  border-color: rgba(227,23,47,0.5);
  color: var(--text);
  background: rgba(227,23,47,0.06);
}
.suggestion-chips { margin-top: 10px; gap: 6px; }

/* Launchpad header — crisper */
.lp-header h2 { font-size: 1.55rem; letter-spacing: -0.028em; }
.lp-card-label { font-weight: 600; font-size: 0.85rem; }
.lp-card-desc { font-size: 0.76rem; }

/* Command palette — polished */
.palette-item { font-size: 0.875rem; }
.palette-kbd { font-size: 0.7rem; opacity: 0.6; }
.palette-group-label { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }

/* Chat header meta tag */
.tool-meta {
  font-size: 0.72rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--accent); opacity: 0.85;
  margin-left: 6px;
}

/* Message sender name */
.msg-name { font-weight: 700; font-size: 0.8rem; letter-spacing: 0.01em; }

/* Thread list item */
.thread-row {
  border-radius: 8px;
}
.thread-row.active { background: rgba(227,23,47,0.07); }
.thread-row-title { font-size: 0.835rem; }
.thread-row-snippet { font-size: 0.745rem; }

/* Topbar — cleaner */
.topbar { border-bottom: 1px solid var(--border); }
.topbar-title { font-size: 0.875rem; font-weight: 600; letter-spacing: -0.008em; }

/* ── Thread drag-to-reorder ──────────────────────────────────────────────── */
.thread-row[draggable="true"] { cursor: grab; }
.thread-row[draggable="true"]:active { cursor: grabbing; }
.thread-row.dragging { opacity: 0.35; pointer-events: none; }
.thread-row.drag-over-top    { border-top: 2px solid var(--accent); }
.thread-row.drag-over-bottom { border-bottom: 2px solid var(--accent); }

/* ── Launchpad recent cards ──────────────────────────────────────────────── */
.lp-card-recent {
  border-color: rgba(227,23,47,0.2);
  background: rgba(227,23,47,0.03);
}
.lp-card-recent:hover {
  border-color: rgba(227,23,47,0.55);
  background: rgba(227,23,47,0.07);
}
.lp-card-summary {
  color: var(--text-faint);
  font-style: italic;
  line-height: 1.45;
}

/* ── Clerk inline embed ───────────────────────────────────────────────────── */
.auth-sign-in-mount { width: 100%; margin-top: 4px; }
/* Widen auth panel slightly to give Clerk form breathing room */
.auth-panel { max-width: 440px !important; }

/* Apple logo is a black SVG — invert it so it's visible on dark Clerk embed */
[class*="providerIcon__apple"] svg,
[class*="providerIcon__apple"] img,
[class*="socialButtonsProviderIcon__apple"] svg,
[class*="socialButtonsProviderIcon__apple"] img { filter: invert(1); }

/* ── Launchpad sub-group labels ─────────────────────────────────────────── */
.lp-group-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 10px 2px 4px;
  opacity: 0.7;
}

/* ══════════════════════════════════════════════════════════════
   CUSTOM TOOL MODAL
══════════════════════════════════════════════════════════════ */
.ct-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.ct-field:last-child { margin-bottom: 0; }
.ct-label {
  font-size: 0.78rem; font-weight: 600; color: var(--text-dim);
  letter-spacing: 0.02em;
}
.ct-label-hint { font-weight: 400; color: var(--text-faint); }
.ct-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  font-size: 0.875rem;
  color: var(--text);
  width: 100%;
  transition: border-color var(--t-fast);
  outline: none;
}
.ct-input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(227,23,47,0.12); }
.ct-textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 0.83rem;
  color: var(--text);
  width: 100%;
  resize: vertical;
  min-height: 130px;
  line-height: 1.6;
  transition: border-color var(--t-fast);
  outline: none;
}
.ct-textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(227,23,47,0.12); }
.ct-icon-grid {
  display: flex; flex-wrap: wrap; gap: 7px;
}
.ct-icon-btn {
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.ct-icon-btn:hover  { border-color: rgba(227,23,47,0.4); background: rgba(227,23,47,0.04); }
.ct-icon-btn.selected {
  border-color: var(--accent);
  background: rgba(227,23,47,0.1);
  box-shadow: 0 0 0 2px rgba(227,23,47,0.15);
}
.ct-actions {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}
.ct-actions-right { display: flex; gap: 8px; }
.ct-delete { margin-right: auto; }

/* ── Launchpad special cards ──────────────────────────────────────────────── */
.lp-card-new-chat {
  border-color: rgba(227,23,47,0.25);
  background: rgba(227,23,47,0.04);
}
.lp-card-new-chat:hover {
  border-color: var(--accent);
  background: rgba(227,23,47,0.09);
}
.lp-card-custom {
  border-color: rgba(227,23,47,0.2);
  background: rgba(227,23,47,0.03);
}
.lp-card-custom:hover {
  border-color: rgba(227,23,47,0.5);
  background: rgba(227,23,47,0.07);
}
.lp-card-create-tool {
  border: 1px dashed rgba(227,23,47,0.35);
  background: transparent;
  opacity: 0.75;
}
.lp-card-create-tool:hover {
  border-color: var(--accent);
  background: rgba(227,23,47,0.06);
  opacity: 1;
}
.lp-new-chat-section { margin-bottom: -4px; }

/* ═══════════════════════════════════════════════════════════
   PAYWALL MODAL
   ═══════════════════════════════════════════════════════════ */
.paywall-overlay {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(0,0,0,0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  animation: paywall-fade-in 0.2s ease;
}
@keyframes paywall-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.paywall-modal {
  position: relative;
  background: #111;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 48px 40px 40px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  animation: paywall-slide-up 0.22s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes paywall-slide-up {
  from { transform: translateY(16px) scale(0.97); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}
.paywall-close-btn {
  position: absolute; top: 14px; right: 14px;
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.35); border-radius: 8px;
  background: none; border: none; cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.paywall-close-btn:hover { color: rgba(255,255,255,0.7); background: rgba(255,255,255,0.07); }
.paywall-ring {
  width: 72px; height: 72px;
  margin: 0 auto 22px;
}
.paywall-ring svg { width: 100%; height: 100%; }
.paywall-used-badge {
  display: inline-block;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.07em;
  text-transform: uppercase; color: #e3172f;
  margin-bottom: 14px;
}
.paywall-title {
  font-size: 1.45rem; font-weight: 800; letter-spacing: -0.025em;
  color: #f0ede8; line-height: 1.25; margin-bottom: 12px;
}
.paywall-sub {
  font-size: 0.9rem; color: rgba(240,237,232,0.65);
  line-height: 1.65; margin-bottom: 26px;
}
.paywall-price-row { margin-bottom: 18px; }
.paywall-price {
  font-size: 2.8rem; font-weight: 800;
  color: #f0ede8; letter-spacing: -0.04em;
}
.paywall-period { font-size: 1rem; color: rgba(240,237,232,0.4); }
.paywall-cta {
  display: block; width: 100%;
  padding: 14px 0; background: #e3172f; color: #fff;
  font-weight: 700; font-size: 0.98rem; border-radius: 12px;
  transition: opacity 0.15s, transform 0.15s;
  margin-bottom: 10px; text-decoration: none;
}
.paywall-cta:hover { opacity: 0.88; transform: translateY(-1px); }
.paywall-security {
  font-size: 0.75rem; color: rgba(240,237,232,0.35);
  margin-bottom: 22px;
}
.paywall-sep {
  border: none; border-top: 1px solid rgba(255,255,255,0.07);
  margin-bottom: 18px;
}
.paywall-sprint-link {
  font-size: 0.8rem; color: rgba(240,237,232,0.4);
  text-decoration: underline; text-underline-offset: 3px;
  transition: color 0.15s;
}
.paywall-sprint-link:hover { color: rgba(240,237,232,0.65); }
@media (max-width: 480px) {
  .paywall-modal { padding: 40px 24px 32px; }
  .paywall-title { font-size: 1.3rem; }
}

/* ════════════════════════════════════════════════════════════════════════════
   SCRIM — mobile sidebar backdrop (no breakpoint; used only when .visible)
═════════════════════════════════════════════════════════════════════════════ */
.scrim {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 99;
  cursor: pointer;
  transition: opacity var(--t-base) var(--ease);
}
.scrim.visible { display: block; }

/* ════════════════════════════════════════════════════════════════════════════
   MOBILE — ≤768px — sidebar drawer, topbar, layout
═════════════════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

  /* ── Sidebar: fixed overlay drawer, slides from left ── */
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 280px;
    max-width: 85vw;
    height: 100dvh;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform var(--t-base) var(--ease);
    border-right: 1px solid var(--border);
    box-shadow: 4px 0 32px rgba(0,0,0,0.6);
  }
  .sidebar.open { transform: translateX(0); }

  /* Cancel all collapsed-state overrides on mobile — drawer is always full */
  .sidebar.collapsed { width: 280px; max-width: 85vw; }
  .sidebar.collapsed .brand-name        { opacity: 1; pointer-events: auto; }
  .sidebar.collapsed .brand             { padding: 4px 8px; }
  .sidebar.collapsed .kbd-hint          { opacity: 1; pointer-events: auto; }
  .sidebar.collapsed .new-thread-btn    { justify-content: flex-start; padding: 8px 10px 8px 12px; gap: 8px; }
  .sidebar.collapsed .sidebar-search-wrap { opacity: 1; pointer-events: auto; }
  .sidebar.collapsed .mod-label         { opacity: 1; pointer-events: auto; }
  .sidebar.collapsed .module-btn        { justify-content: flex-start; padding: 6px 10px; gap: 9px; }
  .sidebar.collapsed .thread-group-label { opacity: 1; height: auto; padding: 2px 14px; pointer-events: auto; }
  .sidebar.collapsed .thread-row        { display: flex; }
  .sidebar.collapsed .thread-empty      { display: block; }
  .sidebar.collapsed .footer-link kbd   { opacity: 1; pointer-events: auto; }
  .sidebar.collapsed .footer-link       { justify-content: flex-start; padding: 8px 10px; gap: 8px; }
  .sidebar.collapsed .footer-link span:nth-child(2) { display: inline; }
  .sidebar.collapsed .ea-label          { opacity: 1; pointer-events: auto; }
  .sidebar.collapsed .early-access-cta  { justify-content: flex-start; padding: 9px 10px; }
  .sidebar.collapsed .auth-sync-state   { display: block; }
  .sidebar.collapsed .auth-signin-btn span { display: inline; }

  /* Hide desktop sidebar toggle — hamburger replaces it */
  .sidebar-toggle { display: none; }

  /* ── Topbar: visible on mobile ── */
  .topbar { display: flex; }

  /* ── Composer: ≥16px prevents iOS auto-zoom on focus ── */
  .composer-input { font-size: 16px; line-height: 1.5; }

  /* ── Welcome screen ── */
  .welcome { padding: 20px 16px 100px; }
  .welcome-mark  { width: 60px; height: 60px; }
  .welcome-title { font-size: 1.65rem; letter-spacing: -0.025em; }
  .welcome-sub   { font-size: 0.85rem; max-width: 100%; }
  .suggestion-chips { flex-wrap: wrap; justify-content: center; gap: 6px; }
  .suggestion-chip  { font-size: 0.76rem; }
  .welcome-quick { gap: 8px; }

  /* ── Chat messages: tighter side padding ── */
  .msg { padding: var(--msg-py) 12px; }
  .chat-header { padding: 8px 12px; gap: 8px; }

  /* ── Launchpad grid: 2 columns on medium mobile ── */
  .lp-row { grid-template-columns: 1fr 1fr; }
  .lp-card { padding: 12px 10px; }

  /* ── Home grid: single column ── */
  .home-grid { grid-template-columns: 1fr; }

  /* ── Modals → bottom sheet ── */
  .modal-overlay { align-items: flex-end; padding: 0; }
  .modal {
    max-width: 100%;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 90dvh;
  }

  /* ── Paywall modal → bottom sheet ── */
  .paywall-overlay { align-items: flex-end; padding: 0; }
  .paywall-modal {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 40px 20px 32px;
    max-height: 90dvh;
    overflow-y: auto;
  }
  .paywall-title { font-size: 1.3rem; }
}

/* ════════════════════════════════════════════════════════════════════════════
   MOBILE — ≤480px — single column everything, tighter type
═════════════════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .lp-row { grid-template-columns: 1fr; }
  .welcome-title { font-size: 1.4rem; }
  .lp-header h2  { font-size: 1.25rem; }
  .msg { padding: var(--msg-py) 10px; }
  .composer-wrap     { padding: 0; }
  .chat-composer-wrap { padding: 8px 10px 16px; }
  .modal-body  { padding: 16px; }
  .modal-header { padding: 16px 16px 12px; }
}

/* ════════════════════════════════════════════════════════════════════════════
   MOBILE FIX PASS 2 — targeted corrections
═════════════════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

  /* ── Fix 1: justify-content:center + overflow-y:auto scroll bug ──
     Centered flex + overflow = top content unreachable. Switch to
     flex-start with manual top padding so scroll works correctly.    ── */
  .welcome {
    justify-content: flex-start;
    padding-top: 48px;
    padding-bottom: 120px;
  }

  /* ── Fix 2: touch targets — minimum 44px per Apple HIG ── */
  .topbar .icon-btn,
  .topbar-menu {
    width: 44px;
    height: 44px;
  }
  .chat-header .header-action-btn {
    width: 40px;
    height: 40px;
  }

  /* ── Fix 3: collapse chat-header action row on mobile ──
     Topbar already shows thread title. The rename/export/share/delete
     row wastes 50px of precious vertical space on small screens.      ── */
  .chat-header {
    padding: 6px 12px;
    min-height: 0;
  }
  .chat-header-actions {
    display: none;
  }
  .chat-header-title {
    font-size: 0.84rem;
  }

  /* ── Fix 4: hide keyboard shortcut hint on touchscreens ── */
  .composer-hint {
    display: none;
  }

  /* ── Fix 5: safe area insets for iPhone notch / home indicator ── */
  .chat-composer-wrap {
    padding-bottom: max(16px, calc(8px + env(safe-area-inset-bottom)));
  }
  .welcome {
    padding-bottom: max(120px, calc(80px + env(safe-area-inset-bottom)));
  }

  /* ── Fix 6: momentum scrolling on iOS for chat messages ── */
  .messages {
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
  }

  /* ── Fix 7: quick action buttons — prevent overflow on narrow screens ── */
  .welcome-quick {
    max-width: 100%;
    width: 100%;
  }
  .quick-btn {
    white-space: normal;
    text-align: center;
    font-size: 0.76rem;
    padding: 6px 10px;
    line-height: 1.3;
  }

  /* ── Bonus: sidebar threads scroll on iOS ── */
  .sidebar-threads {
    -webkit-overflow-scrolling: touch;
  }

  /* ── Bonus: topbar shows thread title in chat view ── */
  .topbar-title {
    font-size: 0.84rem;
    font-weight: 600;
  }
}

/* Extra small screens */
@media (max-width: 390px) {
  .welcome {
    padding-top: 32px;
    padding-left: 14px;
    padding-right: 14px;
  }
  .welcome-title { font-size: 1.3rem; }
  .welcome-sub   { font-size: 0.8rem; }
  .quick-btn     { font-size: 0.72rem; padding: 5px 8px; }
}

/* ── Mobile Fix Pass 3: touch-action + iOS sidebar clip ────────────────── */
html, body {
  touch-action: manipulation;
}
button, a, input, textarea, select,
[role="button"], [role="tab"], [role="option"],
.icon-btn, .quick-btn, .lp-card, .thread-row,
.sidebar-nav-btn, .topbar-menu, .palette-item,
.home-card, .compose-btn, .action-btn {
  touch-action: manipulation;
}

@media (max-width: 768px) {
  /* Prevent iOS Safari from clipping position:fixed sidebar */
  .shell {
    z-index: auto !important;
    overflow: visible !important;
  }
  .sidebar {
    z-index: 1000;
  }
  .scrim {
    z-index: 900;
  }
  /* Keep scroll containment on the scrollable panel only */
  .main {
    overflow: hidden;
  }
}

/* Mobile Fix Pass 4: final drawer stack and touch-density polish */
@media (max-width: 768px) {
  .launchpad {
    padding: 16px;
  }

  .chat-header {
    display: none;
  }

  .brand,
  .new-thread-btn,
  .sidebar-search,
  .module-btn,
  .thread-row,
  .footer-link,
  .auth-signin-btn {
    min-height: 44px;
  }

  .thread-action-btn {
    width: 44px;
    height: 44px;
  }

  .sidebar .kbd-hint {
    display: none;
  }

  .msg-actions {
    opacity: 1;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
  }

  .msg-action {
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    gap: 0;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface);
    font-size: 0;
  }

  .msg-action svg {
    width: 18px;
    height: 18px;
  }
}

@media (max-width: 480px) {
  .launchpad {
    padding-left: 16px;
    padding-right: 16px;
  }
}
/* ── End Mobile Fix Pass 3 ──────────────────────────────────────────────── */