@import "tailwindcss";

/* ═══════════════════════════════════════════
   WREN — PREMIUM DESIGN SYSTEM v3 (Coral Theme)
   Modern-minimal genre • Stat-Led / Workbench / Long Document macrostructures
   Tokens locked — no mid-render improvisation
   ═══════════════════════════════════════════ */

/* ─────────────────────────────────────────────
   KEYFRAMES — Spring physics only
   ───────────────────────────────────────────── */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scale-in {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes slide-in-right {
  from { opacity: 0; transform: translateX(24px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes pulse-glow {
  0%, 100% { opacity: 0.4; }
  50%      { opacity: 1; }
}

/* ── Reduced motion overrides ── */
@media (prefers-reduced-motion: reduce) {
  .animate-fade-in-up,
  .animate-fade-in,
  .animate-scale-in,
  .animate-slide-in-right,
  .animate-pulse-glow,
  .animate-shimmer,
  .animate-fade-in-down,
  .animate-pop-in,
  .animate-float-in,
  .shimmer,
  .aurora,
  .stagger > *,
  .hover-lift,
  .press:active,
  .btn,
  .btn-accent,
  .nav-item,
  .card {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
  .card:hover,
  .btn-accent:hover,
  .nav-item:hover { transform: none !important; }
  .gradient-glow::before { opacity: 0 !important; transition: none !important; }
}

/* ── Normal motion (default) ── */
.animate-fade-in-up   { animation: fade-in-up 0.6s var(--ease-spring) both; }
.animate-fade-in      { animation: fade-in 0.4s var(--ease-out) both; }
.animate-scale-in     { animation: scale-in 0.4s var(--ease-out) both; }
.animate-slide-in-right { animation: slide-in-right 0.4s var(--ease-out) both; }
.animate-pulse-glow   { animation: pulse-glow 2s ease-in-out infinite; }
.animate-shimmer      { animation: shimmer 1.5s ease-in-out infinite; }

/* ─────────────────────────────────────────────
   DESIGN TOKENS — DARK (default)
   ───────────────────────────────────────────── */
:root {
  /* Surfaces — cool dark, tinted toward accent */
  --bg: #0A0A0B;
  --bg-elevated: #111113;
  --surface: #18181B;
  --surface-hover: #1F1F23;
  --surface-elevated: #1C1C20;
  --border: #27272A;
  --border-strong: #3F3F46;
  --border-accent: rgba(232, 108, 74, 0.25);

  /* Text — high contrast, cool tint */
  --text: #FAFAFA;
  --text-muted: #A1A1AA;
  --text-subtle: #71717A;
  --text-quiet: #52525B;

  /* Accent — Coral (single, locked) */
  --accent: #E86C4A;
  --accent-hover: #D15838;
  --accent-subtle: rgba(232, 108, 74, 0.12);
  --accent-glow: rgba(232, 108, 74, 0.08);

  /* Semantic */
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;

  /* Diff colors */
  --diff-add: #22C55E;
  --diff-add-text: #86EFAC;
  --diff-del: #EF4444;
  --diff-del-text: #FCA5A5;

  /* Typography — Geist stack */
  --font-sans: "Geist Variable", "Geist", system-ui, sans-serif;
  --font-mono: "Geist Mono Variable", "Geist Mono", ui-monospace, "SF Mono", "Cascadia Code", monospace;

  /* Radii — single system */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Easing — spring physics */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.64, 0, 0.78, 0);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Shadows — tinted to background */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --shadow-inner: inset 0 1px 0 rgba(255, 255, 255, 0.04);

  /* Legacy Claude vars (backward compat) */
  --claude-canvas: var(--bg);
  --claude-sidebar: var(--surface);
  --claude-bubble: var(--surface-hover);
  --claude-text: var(--text);
  --claude-text-secondary: var(--text-muted);
  --claude-text-tertiary: var(--text-subtle);
  --claude-border: var(--border-strong);
  --claude-input-border: var(--border);
  --claude-accent: var(--accent);
  --claude-hover: rgba(255, 255, 255, 0.04);
  --claude-header-bg: rgba(10, 10, 11, 0.88);

  /* ── Text aliases (component-facing) ── */
  --text-primary: var(--text);
  --text-secondary: var(--text-muted);
  --text-tertiary: var(--text-subtle);

  /* ── Glass system (shell + glass surfaces) ── */
  --glass-bg: var(--bg);
  --glass-surface: rgba(24, 24, 27, 0.72);
  --glass-sidebar: rgba(17, 17, 19, 0.82);
  --glass-accent: var(--accent);
  --glass-text-primary: var(--text);
  --glass-text-secondary: var(--text-muted);
  --glass-text-tertiary: var(--text-subtle);
  --glass-border: var(--border);
  --glass-border-strong: var(--border-strong);
}

/* ─────────────────────────────────────────────
   LIGHT MODE
   ───────────────────────────────────────────── */
.light {
  --bg: #FAFAF9;
  --bg-elevated: #F5F5F4;
  --surface: rgba(255, 255, 255, 0.70);
  --surface-hover: rgba(255, 255, 255, 0.90);
  --surface-elevated: #FFFFFF;
  --border: rgba(0, 0, 0, 0.06);
  --border-strong: rgba(0, 0, 0, 0.10);
  --border-accent: rgba(232, 108, 74, 0.20);

  --text: #18181B;
  --text-muted: #52525B;
  --text-subtle: #71717A;
  --text-quiet: #A1A1AA;

  --accent: #E86C4A;
  --accent-hover: #D15838;
  --accent-subtle: rgba(232, 108, 74, 0.10);
  --accent-glow: rgba(232, 108, 74, 0.06);

  /* Diff colors (light) */
  --diff-add: #22C55E;
  --diff-add-text: #166534;
  --diff-del: #EF4444;
  --diff-del-text: #991B1B;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
  --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --shadow-inner: inset 0 1px 0 rgba(255, 255, 255, 0.6);

  --claude-canvas: var(--bg);
  --claude-sidebar: var(--surface);
  --claude-bubble: var(--surface-hover);
  --claude-text: var(--text);
  --claude-text-secondary: var(--text-muted);
  --claude-text-tertiary: var(--text-subtle);
  --claude-border: var(--border-strong);
  --claude-input-border: var(--border);
  --claude-accent: var(--accent);
  --claude-hover: rgba(0, 0, 0, 0.04);
  --claude-header-bg: rgba(250, 250, 249, 0.88);

  /* ── Text aliases (component-facing) ── */
  --text-primary: var(--text);
  --text-secondary: var(--text-muted);
  --text-tertiary: var(--text-subtle);

  /* ── Glass system (shell + glass surfaces) ── */
  --glass-bg: var(--bg);
  --glass-surface: rgba(255, 255, 255, 0.72);
  --glass-sidebar: rgba(250, 250, 249, 0.82);
  --glass-accent: var(--accent);
  --glass-text-primary: var(--text);
  --glass-text-secondary: var(--text-muted);
  --glass-text-tertiary: var(--text-subtle);
  --glass-border: var(--border);
  --glass-border-strong: var(--border-strong);
}

/* ─────────────────────────────────────────────
   PRIMITIVE COMPONENT CLASSES (Token-locked)
   ───────────────────────────────────────────── */

/* ── Button Base ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  box-shadow: var(--shadow-sm), var(--shadow-inner);
}
.btn:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md), var(--shadow-inner);
}
.btn:active { transform: scale(0.98); }
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* ── Button Accent (Coral) ── */
.btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 4px 16px rgba(232, 108, 74, 0.25);
}
.btn-accent:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 6px 24px rgba(232, 108, 74, 0.35);
  transform: translateY(-1px);
}
.btn-accent:active { transform: translateY(0) scale(0.98); }

/* ── Button Ghost ── */
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover {
  background: var(--accent-subtle);
  color: var(--accent);
  border-color: transparent;
}

/* ── Input ── */
.input {
  width: 100%;
  height: 2.5rem;
  padding: 0 0.875rem;
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  color: var(--text);
  transition: border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
  box-shadow: var(--shadow-sm), var(--shadow-inner);
}
.input::placeholder { color: var(--text-quiet); }
.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-subtle), var(--shadow-md), var(--shadow-inner);
}
.input:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm), var(--shadow-inner);
  transition: border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}
.card:hover {
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
  box-shadow: var(--shadow-md), var(--shadow-inner), var(--shadow-glow);
  transform: translateY(-1px);
}

/* ── Card Elevated (modals, drawers) ── */
.card-elevated {
  background: var(--surface-hover);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg), var(--shadow-inner), var(--shadow-glow);
}

/* ── Nav Item (N5 Floating pill) ── */
.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.nav-item:hover {
  background: var(--accent-subtle);
  color: var(--accent);
}
.nav-item.active {
  background: var(--accent);
  color: white;
}
.nav-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Skeleton Loader ── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface) 25%,
    var(--surface-hover) 50%,
    var(--surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

/* ── Empty State ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--text-subtle);
}
.empty-state-icon {
  width: 3rem;
  height: 3rem;
  margin-bottom: 1rem;
  color: var(--text-quiet);
}
.empty-state-title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.375rem;
}
.empty-state-desc {
  font-size: 0.8125rem;
  max-width: 20rem;
}

/* ── Gradient Glow (section backgrounds) ── */
.gradient-glow {
  background: radial-gradient(
    ellipse at 50% 0%,
    color-mix(in srgb, var(--accent) 4%, transparent) 0%,
    transparent 70%
  );
}

/* ── Gradient Accent Border ── */
.gradient-accent-border {
  position: relative;
}
.gradient-accent-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent), transparent 50%);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  pointer-events: none;
  z-index: -1;
}
.gradient-accent-border:hover::before { opacity: 0.15; }

/* ── Shimmer Loading ── */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--surface) 25%,
    color-mix(in srgb, var(--accent) 8%, var(--surface-hover)) 50%,
    var(--surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

/* ─────────────────────────────────────────────
   GLASS COMPONENT CLASSES
   ───────────────────────────────────────────── */

/* ── Glass Sidebar (left rail) ── */
.glass-sidebar {
  background: color-mix(in srgb, var(--glass-sidebar) 88%, transparent);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  border-right: 1px solid var(--glass-border);
}

/* ── Glass Bubble (chat messages) ── */
.glass-bubble {
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm), var(--shadow-inner);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}

/* ── Glass Input (composer) ── */
.glass-input {
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  box-shadow: var(--shadow-sm), var(--shadow-inner);
}

/* ── Backdrop Overlay (modals) ── */
.backdrop-overlay {
  background: rgba(0, 0, 0, 0.5);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  animation: fade-in 0.25s var(--ease-out) both;
}

/* ── Hover Lift (cards) ── */
.hover-lift {
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), var(--shadow-inner), var(--shadow-glow);
}

/* ── Press (buttons / interactive) ── */
.press {
  transition: transform var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.press:active { transform: scale(0.97); }

/* ─────────────────────────────────────────────
   EXTENDED KEYFRAMES
   ───────────────────────────────────────────── */
@keyframes fade-in-down {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pop-in {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes aurora {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes float-in {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Extended animation utilities ── */
.animate-fade-in-down { animation: fade-in-down 0.5s var(--ease-spring) both; }
.animate-pop-in       { animation: pop-in 0.35s var(--ease-spring) both; }
.animate-float-in     { animation: float-in 0.6s var(--ease-out) both; }

/* ── Staggered entrance (set --i per child) ── */
.stagger > * {
  opacity: 0;
  animation: fade-in-up 0.5s var(--ease-spring) both;
  animation-delay: calc(var(--i, 0) * 55ms);
}

/* ── Ambient aurora background ── */
.aurora {
  background: linear-gradient(
    120deg,
    color-mix(in srgb, var(--accent) 3%, transparent) 0%,
    color-mix(in srgb, var(--accent) 1%, transparent) 50%,
    transparent 100%
  );
  background-size: 200% 200%;
  animation: aurora 14s ease-in-out infinite;
}

/* ─────────────────────────────────────────────
   TAILWIND v4 THEME REGISTRATION
   ───────────────────────────────────────────── */
@theme {
  --color-accent: var(--accent);
  --color-accent-hover: var(--accent-hover);
  --color-accent-subtle: var(--accent-subtle);
  --color-text: var(--text);
  --color-text-primary: var(--text-primary);
  --color-text-secondary: var(--text-secondary);
  --color-text-tertiary: var(--text-tertiary);
  --color-text-muted: var(--text-muted);
  --color-text-subtle: var(--text-subtle);
  --color-text-quiet: var(--text-quiet);
  --color-surface: var(--surface);
  --color-surface-hover: var(--surface-hover);
  --color-surface-elevated: var(--surface-elevated);
  --color-border: var(--border);
  --color-border-strong: var(--border-strong);
  --color-bg: var(--bg);
  --color-bg-elevated: var(--bg-elevated);
  --font-sans: var(--font-sans);
  --font-mono: var(--font-mono);
  --ease-out: var(--ease-out);
  --ease-spring: var(--ease-spring);
  --radius-sm: var(--radius-sm);
  --radius-md: var(--radius-md);
  --radius-lg: var(--radius-lg);
  --radius-xl: var(--radius-xl);
  --radius-full: var(--radius-full);
}

/* ─────────────────────────────────────────────
   BASE STYLES
   ───────────────────────────────────────────── */
* { box-sizing: border-box; }
html, body, #root { height: 100%; margin: 0; padding: 0; }

html, body {
  transition: background-color 0.3s var(--ease-out),
              color 0.3s var(--ease-out);
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  text-rendering: geometricPrecision;
}

/* ── Ambient background glow ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 20% 50%, color-mix(in srgb, var(--accent) 2%, transparent) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, color-mix(in srgb, var(--accent) 1.5%, transparent) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, color-mix(in srgb, var(--accent) 1%, transparent) 0%, transparent 50%);
  will-change: transform;
  transform: translateZ(0);
}

/* ── Skip Link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-md);
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: 1rem; }

/* ── Selection ── */
::selection {
  background: color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--text);
}

/* ── Focus ring (visible only to keyboard users) ── */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
*:focus:not(:focus-visible) { outline: none; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 3px;
  transition: background var(--dur-fast) var(--ease-out);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-quiet); }

/* ── Reduced transparency (accessibility) ── */
@media (prefers-reduced-transparency: reduce) {
  .card, .card-elevated, .input, .btn, .btn-accent, .nav-item {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
  .card, .input, .btn, .nav-item {
    background: var(--bg-elevated) !important;
  }
  .card-elevated { background: var(--surface-hover) !important; }
  body::before { opacity: 0 !important; }
}

/* ── Durations ── */
:root {
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 400ms;
}