/* ---- Shared design tokens for 套磁助手 ---- */
:root {
  /* Acadbridge blue/slate palette (matches the marketing landing page) */
  --bg: #F6F9FF;
  --surface: #FFFFFF;
  --surface-2: #F1F5FB;
  --surface-3: #E8EFFA;
  --ink: #0F172A;
  --ink-soft: #475569;
  --ink-mute: #94A3B8;
  --border: #E5EAF2;
  --border-strong: #CBD8EE;

  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-soft: #DBE7FF;
  --primary-ring: rgba(37, 99, 235, 0.25);

  --mint: #10B981;
  --mint-soft: #D1FAE5;
  --sun: #F59E0B;
  --sun-soft: #FEF3C7;
  --berry: #E11D48;
  --berry-soft: #FFE4E6;
  --sky: #0EA5E9;
  --sky-soft: #E0F2FE;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 2px 6px rgba(15, 23, 42, 0.05);
  --shadow: 0 4px 14px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(30, 64, 175, 0.14), 0 2px 6px rgba(15, 23, 42, 0.06);

  --font-display: 'Nunito', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Nunito', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, monospace;
}

/* dark mode adjustments are applied via [data-theme="dark"] on artboard root */
[data-theme="dark"] {
  --bg: #0F172A;
  --surface: #1E293B;
  --surface-2: #243244;
  --surface-3: #2D3D52;
  --ink: #E2E8F0;
  --ink-soft: #94A3B8;
  --ink-mute: #64748B;
  --border: #334155;
  --border-strong: #475569;
  --primary: #3B82F6;
  --primary-soft: #1E3A5F;
  --primary-ring: rgba(59, 130, 246, 0.3);
  --mint-soft: #1F3A2E;
  --sun-soft: #3A2E18;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 4px 14px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
}

/* palette swaps */
[data-palette="mint"] {
  --primary: #10B981;
  --primary-hover: #059669;
  --primary-soft: #D1FAE5;
  --primary-ring: rgba(16, 185, 129, 0.25);
}
[data-palette="sky"] {
  --primary: #0EA5E9;
  --primary-hover: #0284C7;
  --primary-soft: #E0F2FE;
  --primary-ring: rgba(14, 165, 233, 0.25);
}
[data-palette="berry"] {
  --primary: #E11D48;
  --primary-hover: #BE123C;
  --primary-soft: #FFE4E6;
  --primary-ring: rgba(225, 29, 72, 0.25);
}

/* --- Artboard scaffold --- */
.tc-root {
  position: absolute;
  inset: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  display: flex;
  overflow: hidden;
  border-radius: inherit;
}

.tc-root * { box-sizing: border-box; }

.tc-btn {
  appearance: none;
  border: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  background: var(--primary);
  color: white;
  box-shadow: 0 3px 0 0 var(--primary-hover);
  transition: transform .08s ease, box-shadow .08s ease, background .15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}
.tc-btn:hover { background: var(--primary-hover); }
.tc-btn:active { transform: translateY(2px); box-shadow: 0 1px 0 0 var(--primary-hover); }
.tc-btn--ghost {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 2px 0 0 var(--border-strong), inset 0 0 0 2px var(--border);
}
.tc-btn--ghost:hover { background: var(--surface-2); }
.tc-btn--ghost:active { box-shadow: 0 0 0 0 var(--border-strong), inset 0 0 0 2px var(--border); transform: translateY(2px); }
.tc-btn--sm { padding: 6px 12px; font-size: 13px; }

.tc-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  border: 2px solid var(--border);
  color: var(--ink);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all .15s ease;
}
.tc-chip:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.tc-chip--active { border-color: var(--primary); background: var(--primary); color: white; }

.tc-input, .tc-textarea {
  width: 100%;
  border: 2px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 12px 14px;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.tc-input:focus, .tc-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-ring);
}
.tc-textarea { resize: none; min-height: 80px; line-height: 1.5; }

.tc-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 6px;
}

/* avatar circle */
.tc-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--primary);
  color: white;
  font-weight: 800;
  font-size: 16px;
  box-shadow: 0 2px 0 0 var(--primary-hover);
}

/* small badge */
.tc-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: var(--sun-soft);
  color: #8C5A00;
  font-size: 11px;
  font-weight: 700;
}
.tc-tag--mint { background: var(--mint-soft); color: #065F46; }
.tc-tag--sky { background: var(--sky-soft); color: #075985; }
.tc-tag--berry { background: var(--berry-soft); color: #9F1239; }
.tc-tag--primary { background: var(--primary-soft); color: var(--primary-hover); }
[data-theme="dark"] .tc-tag { color: var(--sun); }
[data-theme="dark"] .tc-tag--mint { color: #6EE7B7; }
[data-theme="dark"] .tc-tag--sky { color: #7DD3FC; }
[data-theme="dark"] .tc-tag--berry { color: #FDA4AF; }

/* scrollbar */
.tc-scroll { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
.tc-scroll::-webkit-scrollbar { width: 6px; height: 6px; }
.tc-scroll::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
.tc-scroll::-webkit-scrollbar-track { background: transparent; }

/* checkmark animation */
@keyframes pop-in {
  0% { transform: scale(0.6); opacity: 0; }
  60% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
.tc-pop { animation: pop-in .35s cubic-bezier(.4,1.5,.5,1); }

/* bouncing dots typing indicator */
@keyframes tc-bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: .4; }
  40% { transform: translateY(-5px); opacity: 1; }
}
.tc-dot {
  display: inline-block;
  width: 7px; height: 7px;
  background: var(--ink-mute);
  border-radius: 50%;
  margin: 0 2px;
  animation: tc-bounce 1.2s infinite ease-in-out;
}
.tc-dot:nth-child(2) { animation-delay: .15s; }
.tc-dot:nth-child(3) { animation-delay: .3s; }

/* progress dots */
.tc-progress {
  display: flex;
  gap: 6px;
  align-items: center;
}
.tc-progress-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-strong);
  transition: all .25s ease;
}
.tc-progress-dot--done { background: var(--mint); }
.tc-progress-dot--current { background: var(--primary); width: 24px; border-radius: 4px; }

/* slide-up fade */
@keyframes slide-up {
  from { transform: translateY(8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.tc-slide-up { animation: slide-up .35s ease both; }

/* ── mobile (single 768px breakpoint, mirrored by useIsMobile() in JSX) ──
   Form grids carry hard-coded gridTemplateColumns inline; !important is the
   only way CSS can collapse them without rewriting every call site. */
@media (max-width: 768px) {
  .tc-formgrid {
    grid-template-columns: 1fr 1fr !important;
  }

  /* Verify / confirm modals go effectively full-screen on small viewports.
     dvh (not vh) so the iOS dynamic toolbar doesn't clip the footer. */
  .tc-modal-panel {
    width: 96vw !important;
    max-width: 96vw !important;
    max-height: 92dvh !important;
    overflow-y: auto !important;
    padding: 16px !important;
  }

  /* Comfortable touch targets */
  .tc-btn { padding: 10px 14px; }
  .tc-btn--sm { padding: 8px 12px; }
  .tc-chip { padding: 8px 12px; }
  .tc-input, .tc-textarea { font-size: 16px; } /* stops iOS auto-zoom on focus */
}