@import './highlight.css';

@tailwind base;
@tailwind components;
@tailwind utilities;

/* ============================================================
   Design tokens — semantic CSS variables driving both themes.
   Components reference these via Tailwind semantic classes
   (bg-surface, text-primary, border-default, etc.), so theme
   switching only swaps variable values, never component code.
   ============================================================ */

:root {
  /* Brand accent (CowAgent green), used sparingly */
  --accent: #4abe6e;
  --accent-hover: #35a85b;
  --accent-active: #228547;
  --accent-soft: rgba(74, 190, 110, 0.12);
  --accent-contrast: #ffffff;

  /* User message bubble (defaults to solid accent; themes may override) */
  --bubble-user-bg: var(--accent);
  --bubble-user-text: #ffffff;

  /* Status colors */
  --success: #4abe6e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.1);
  --danger-border: rgba(239, 68, 68, 0.3);
  --info: #3b82f6;

  /* Light theme — aligned with the web console: gray surfaces/borders + slate text */
  --bg-base: #f9fafb;        /* app background (gray-50) */
  --bg-surface: #ffffff;     /* panels, cards */
  --bg-surface-2: #f3f4f6;   /* nested surfaces, hover fills (gray-100) */
  --bg-elevated: #ffffff;    /* popovers, menus, modals */
  --bg-inset: #f3f4f6;       /* inputs, code blocks (gray-100) */

  --text-primary: #1e293b;   /* headings, primary text (slate-800) */
  --text-secondary: #475569; /* body, labels (slate-600) */
  --text-tertiary: #64748b;  /* hints, captions (slate-500) */
  --text-disabled: #94a3b8;  /* slate-400 */

  --border-default: #e5e7eb; /* gray-200 (web console border) */
  --border-strong: #d1d5db;  /* gray-300 */
  --border-subtle: #f3f4f6;  /* gray-100 */

  --overlay: rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);

  /* Chat-specific tokens (AI-Native UI) */
  --ai-bubble-bg: transparent;
  --message-gap: 16px;

  /* Shape tokens — themable (radius / fonts). Kept as variables so a
     theme can reshape the whole UI without touching components. */
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-sm: 6px;
  --font-sans: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Wallpaper layer — empty by default (solid theme). A theme sets these
     to render an ambient background image behind the app. */
  --wallpaper-image: none;
  --wallpaper-position: 50% 50%;
  --wallpaper-overlay: rgba(255, 255, 255, 0);
  /* Panel fill used by .glass surfaces; opaque by default so non-glass
     themes look identical to today. */
  --glass-fill: var(--bg-surface);
  --glass-blur: 0px;
  /* 1 = fully opaque surfaces (default). A glass wallpaper theme lowers this
     so bg-surface panels turn translucent and reveal the wallpaper. */
  --surface-alpha: 1;

  color-scheme: light;
}

.dark {
  /* Dark theme — layered greys instead of harsh pure black */
  --bg-base: #0e0e10;
  --bg-surface: #161618;
  --bg-surface-2: #1c1c1f;
  --bg-elevated: #1f1f23;
  --bg-inset: #161618;

  --text-primary: #f4f4f5;     /* contrast > 7:1 on bg-base */
  --text-secondary: #c4c4cc;
  --text-tertiary: #8e8e96;
  --text-disabled: #5a5a62;

  --border-default: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --border-subtle: rgba(255, 255, 255, 0.04);

  --accent-contrast: #0e0e10;

  --overlay: rgba(0, 0, 0, 0.6);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);

  color-scheme: dark;
}

/* ============================================================
   Base
   ============================================================ */

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
  line-height: 1.6;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
}

/* ============================================================
   Wallpaper layer — ambient background behind the whole app.
   Rendered as a fixed pseudo-element so it never scrolls and
   sits under all content. Invisible unless a theme sets
   --wallpaper-image (default 'none').
   ============================================================ */
#root {
  position: relative;
  isolation: isolate;
}

body[data-wallpaper='on']::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: var(--wallpaper-image);
  background-size: cover;
  background-position: var(--wallpaper-position);
  background-repeat: no-repeat;
  pointer-events: none;
}

/* Scrim over the wallpaper to keep foreground readable. */
body[data-wallpaper='on']::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--wallpaper-overlay);
  pointer-events: none;
}

/* When a wallpaper is active, let the app base show it through. The three
   structural panels use bg-base; make that fill translucent so the ambient
   image reads behind the UI. Surfaces/cards stay controlled by their own
   tokens (or .glass) for readability. Zero component changes needed. */
body[data-wallpaper='on'] {
  background: transparent;
}

body[data-wallpaper='on'] .bg-base {
  background-color: color-mix(in srgb, var(--bg-base) 45%, transparent);
}

/* Glass mode (wallpaper + glass theme): turn the common surface panels
   translucent + blurred so the wallpaper reads behind the whole UI, with a
   subtle top border-highlight for a premium, layered material feel. All via
   CSS only — components keep using bg-surface / bg-elevated unchanged. */
body[data-wallpaper='on'] .bg-surface,
body[data-wallpaper='on'] .bg-elevated {
  background-color: color-mix(in srgb, var(--bg-surface) calc(var(--surface-alpha) * 100%), transparent);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
}

/* Slightly brighten default borders over a wallpaper so panels keep clean
   edges against the artwork. Kept subtle — no inset shadows on every bordered
   element (that would look noisy on inputs/dividers). */
body[data-wallpaper='on'] .border-default {
  border-color: color-mix(in srgb, var(--border-default) 78%, rgba(255, 255, 255, 0.12));
}

/* ---- New-chat home page under a wallpaper ------------------------
   When a wallpaper is active, the empty chat home keeps its original
   centered layout; the suggestion cards just get a premium frosted-glass
   treatment so they read cleanly over the artwork. Only the empty state. */
body[data-wallpaper='on'] .chat-home .bg-surface {
  background-color: color-mix(in srgb, var(--bg-surface) calc(var(--surface-alpha) * 100%), transparent);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18), inset 0 1px 0 0 rgba(255, 255, 255, 0.08);
}

/* Frosted-glass panel: translucent fill + blur so the wallpaper shows
   through. Opt-in via the .glass class; a theme toggles the fill/blur
   variables. Falls back to a solid surface when glass is off. */
.glass {
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
}

/* Smooth theme transition (respect reduced motion) */
body,
body * {
  transition-property: background-color, border-color, color, fill, stroke;
  transition-duration: 200ms;
  transition-timing-function: ease;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ============================================================
   Scrollbar — thin, low-key, theme-aware
   ============================================================ */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
  background-clip: padding-box;
}

/* Windows scrollbars are slightly wider/more visible */
.platform-win ::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

/* ============================================================
   Titlebar drag regions (frameless window)
   ============================================================ */

.titlebar-drag {
  -webkit-app-region: drag;
}

.titlebar-no-drag {
  -webkit-app-region: no-drag;
}

/* ============================================================
   Animations
   ============================================================ */

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.animate-blink {
  animation: blink 1s step-end infinite;
}

/* AI typing indicator — 3-dot pulse */
@keyframes typingPulse {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 9999px;
  background: var(--text-tertiary);
  animation: typingPulse 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Smooth content reveal */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-reveal {
  animation: fadeInUp 0.25s ease both;
}

/* Skeleton shimmer */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-surface-2) 25%,
    var(--border-subtle) 50%,
    var(--bg-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 6px;
}

/* ============================================================
   Markdown content (assistant messages, memory/knowledge viewers)
   ============================================================ */

.msg-content > *:first-child { margin-top: 0; }
.msg-content > *:last-child { margin-bottom: 0; }
.msg-content p { margin: 0.5em 0; line-height: 1.7; }
.msg-content ul, .msg-content ol { padding-left: 1.4em; margin: 0.5em 0; }
.msg-content li { margin: 0.25em 0; }
.msg-content h1, .msg-content h2, .msg-content h3, .msg-content h4 {
  font-weight: 600;
  margin: 0.8em 0 0.4em;
  color: var(--text-primary);
}
.msg-content h1 { font-size: 1.4em; }
.msg-content h2 { font-size: 1.25em; }
.msg-content h3 { font-size: 1.1em; }

.msg-content a { color: var(--accent); text-decoration: none; }
.msg-content a:hover { text-decoration: underline; }

.msg-content blockquote {
  padding-left: 0.9em;
  margin: 0.6em 0;
  border-left: 3px solid var(--accent);
  color: var(--text-secondary);
}

.msg-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.8em 0;
  font-size: 0.9em;
}
.msg-content th, .msg-content td {
  border: 1px solid var(--border-default);
  padding: 0.4em 0.7em;
  text-align: left;
}
.msg-content th { background: var(--bg-surface-2); font-weight: 600; }

.msg-content hr { border: none; border-top: 1px solid var(--border-default); margin: 1em 0; }

/* Inline code */
.msg-content :not(pre) > code {
  padding: 0.12em 0.4em;
  border-radius: 5px;
  background: var(--bg-inset);
  border: 1px solid var(--border-subtle);
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  font-size: 0.85em;
}

/* Fenced code blocks */
.msg-content .code-block-wrapper {
  margin: 0.7em 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-default);
  background: var(--bg-inset);
}
.msg-content .code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 10px 5px 12px;
  background: var(--bg-surface-2);
  border-bottom: 1px solid var(--border-subtle);
}
.msg-content .code-block-lang {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: lowercase;
  letter-spacing: 0.02em;
}
.msg-content .code-copy-btn {
  font-size: 11px;
  color: var(--text-tertiary);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 5px;
  transition: color 0.15s, background 0.15s;
}
.msg-content .code-copy-btn:hover { color: var(--text-secondary); background: var(--bg-inset); }
.msg-content .code-copy-btn.copied { color: var(--accent); }
.msg-content .code-block-wrapper pre {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  background: transparent;
}
.msg-content .code-block-wrapper pre code,
.msg-content pre code.hljs {
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  background: transparent;
  padding: 0;
}
