/* common.css — Global Design System: "Refined Terminal" */

/* ===== Design Tokens ===== */
:root {
  /* Brand: Deep navy → blue gradient */
  --c-primary: #0f1b2d;
  --c-primary-end: #1a3050;
  --c-primary-light: #243b5c;

  /* Interaction: Vibrant blue */
  --c-accent: #3b82f6;
  --c-accent-hover: #2563eb;
  --c-accent-light: #60a5fa;
  --c-accent-bg: #eff6ff;
  --c-accent-bg2: rgba(59,130,246,.08);
  --c-accent-border: rgba(59,130,246,.35);

  /* Semantic: A-stock red up / green down */
  --c-up: #ef4444;
  --c-dn: #22c55e;
  --c-warn: #f59e0b;

  /* Surfaces */
  --c-bg: #eef1f6;
  --c-surface: #ffffff;
  --c-surface-raised: #ffffff;
  --c-text: #0f172a;
  --c-text2: #475569;
  --c-text3: #94a3b8;
  --c-fill: #f5f7fa;
  --c-border: #e2e8f0;
  --c-border-light: #f1f5f9;

  /* Sidebar (dark) */
  --c-side-bg: linear-gradient(180deg, #0f1b2d 0%, #162942 50%, #1a3050 100%);
  --c-side-text: rgba(255,255,255,.7);
  --c-side-text-active: #ffffff;
  --c-side-hover: rgba(255,255,255,.06);
  --c-side-active: rgba(59,130,246,.2);
  --c-side-border: rgba(255,255,255,.06);

  /* Shadows */
  --c-shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 4px rgba(0,0,0,.03);
  --c-shadow-md: 0 4px 16px rgba(0,0,0,.06), 0 1px 4px rgba(0,0,0,.04);
  --c-shadow-lg: 0 12px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.06);

  /* Radius */
  --c-radius-sm: 6px;
  --c-radius-md: 10px;
  --c-radius-lg: 14px;

  /* Layout */
  --c-header-h: 52px;

  /* Typography */
  --c-font: 'PingFang SC', 'Microsoft YaHei', -apple-system, 'Segoe UI', sans-serif;
  --c-font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
}

/* ===== Font ===== */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('https://cdn.jsdelivr.net/gh/JetBrains/JetBrainsMono@2.304/fonts/webfonts/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('https://cdn.jsdelivr.net/gh/JetBrains/JetBrainsMono@2.304/fonts/webfonts/JetBrainsMono-SemiBold.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-display: swap;
}

/* ===== Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box }
body {
  font-family: var(--c-font);
  background: var(--c-bg);
  color: var(--c-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px }
::-webkit-scrollbar-track { background: transparent }
::-webkit-scrollbar-thumb { background: #c1c9d4; border-radius: 3px }
::-webkit-scrollbar-thumb:hover { background: #a0aab6 }

/* ===== Global Top Nav ===== */
.global-nav {
  height: var(--c-header-h);
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-end) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 24px;
  box-shadow: 0 2px 16px rgba(0,0,0,.2), inset 0 -1px 0 rgba(255,255,255,.05);
  z-index: 1000;
  position: sticky;
  top: 0;
  gap: 12px;
}
.global-nav .home-link {
  display: flex; align-items: center; gap: 6px;
  color: rgba(255,255,255,.7); text-decoration: none;
  font-size: 13px; padding: 5px 12px; border-radius: var(--c-radius-sm);
  transition: all .2s; flex-shrink: 0;
}
.global-nav .home-link:hover { color: #fff; background: rgba(255,255,255,.1) }
.global-nav .nav-logo { height: 30px; border-radius: 6px; margin-right: 2px }
.global-nav .nav-title {
  font-size: 17px; font-weight: 700; letter-spacing: 1px;
  background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,.8) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.global-nav .nav-sub {
  font-size: 10px; opacity: .35; margin-left: 6px; letter-spacing: 1.5px;
  text-transform: uppercase;
}
.global-nav .nav-spacer { flex: 1 }
.global-nav .nav-links { display: flex; gap: 4px }
.global-nav .nav-link {
  color: rgba(255,255,255,.55); text-decoration: none;
  font-size: 12px; padding: 6px 14px; border-radius: var(--c-radius-sm);
  transition: all .2s; font-weight: 500;
}
.global-nav .nav-link:hover,
.global-nav .nav-link.active {
  color: #fff;
  background: rgba(255,255,255,.1);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root { --c-header-h: 44px }
  .global-nav { padding: 0 10px; gap: 6px }
  .global-nav .nav-title { font-size: 14px }
  .global-nav .nav-sub { display: none }
  .global-nav .home-link { font-size: 12px; padding: 3px 6px }
  .global-nav .nav-links { gap: 2px }
  .global-nav .nav-link { font-size: 11px; padding: 3px 6px }
  ::-webkit-scrollbar { width: 4px; height: 4px }
}