@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;

  /* 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 — layered neutral surfaces */
  --bg-base: #fafafa;        /* app background */
  --bg-surface: #ffffff;     /* panels, cards */
  --bg-surface-2: #f4f4f5;   /* nested surfaces, hover fills */
  --bg-elevated: #ffffff;    /* popovers, menus, modals */
  --bg-inset: #f4f4f5;       /* inputs, code blocks */

  --text-primary: #18181b;   /* headings, primary text (contrast > 4.5:1) */
  --text-secondary: #52525b; /* body, labels */
  --text-tertiary: #71717a;  /* hints, captions */
  --text-disabled: #a1a1aa;

  --border-default: #e4e4e7;
  --border-strong: #d4d4d8;
  --border-subtle: #f0f0f1;

  --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) */
  --user-bubble-bg: var(--accent-soft);
  --ai-bubble-bg: transparent;
  --message-gap: 16px;

  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);

  --user-bubble-bg: rgba(74, 190, 110, 0.16);

  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;
}

/* 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;
}
