/* ============================================================
   TTToken Docs · Design System
   ============================================================ */

:root {
  /* Palette — light */
  --color-bg:            #ffffff;
  --color-bg-soft:       #f7f8fa;
  --color-bg-elev:       #ffffff;
  --color-border:        #e6e8ec;
  --color-border-strong: #d7dae0;
  --color-text:          #1a1d22;
  --color-text-soft:     #474d57;
  --color-text-muted:    #7a828e;
  --color-link:          #2f6feb;
  --color-link-hover:    #1e54c4;
  --color-brand:         #2f6feb;
  --color-brand-soft:    #eaf0fe;
  --color-success:       #16a34a;
  --color-warning:       #d97706;
  --color-danger:        #dc2626;
  --color-code-bg:       #0f1115;
  --color-code-text:     #e6e8ec;
  --color-inline-code-bg:#f1f3f5;
  --color-inline-code:   #c53030;

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas,
               "Liberation Mono", monospace;

  /* Radius / shadow */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 17, 21, 0.04);
  --shadow-md: 0 4px 14px rgba(15, 17, 21, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 17, 21, 0.08);

  /* Layout */
  --topbar-h: 60px;
  --sidebar-w: 260px;
  --toc-w: 220px;
  --content-max: 880px;
  --container-max: 1280px;
}

[data-theme="dark"] {
  --color-bg:            #0e1014;
  --color-bg-soft:       #14171d;
  --color-bg-elev:       #1a1e26;
  --color-border:        #262b35;
  --color-border-strong: #343a46;
  --color-text:          #e6e8ec;
  --color-text-soft:     #b8bdc7;
  --color-text-muted:    #7f8695;
  --color-link:          #6e9cff;
  --color-link-hover:    #8fb2ff;
  --color-brand:         #6e9cff;
  --color-brand-soft:    #1b2438;
  --color-inline-code-bg:#20252e;
  --color-inline-code:   #ff9c8a;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--color-link); text-decoration: none; }
a:hover { color: var(--color-link-hover); }
img { max-width: 100%; display: block; }
hr { border: 0; border-top: 1px solid var(--color-border); margin: 32px 0; }

h1, h2, h3, h4, h5 {
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
h1 { font-size: 32px; margin: 0 0 16px; }
h2 { font-size: 24px; margin: 48px 0 16px; padding-top: 8px; }
h3 { font-size: 19px; margin: 32px 0 12px; }
h4 { font-size: 16px; margin: 24px 0 10px; }
p  { margin: 12px 0; color: var(--color-text-soft); }

/* Inline code */
:not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-inline-code-bg);
  color: var(--color-inline-code);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Code block */
pre {
  font-family: var(--font-mono);
  background: var(--color-code-bg);
  color: var(--color-code-text);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
  position: relative;
  margin: 16px 0;
}
pre code { background: transparent; color: inherit; padding: 0; font-size: inherit; }
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255,255,255,0.08);
  color: #e6e8ec;
  border: 1px solid rgba(255,255,255,0.15);
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s;
}
.copy-btn:hover { background: rgba(255,255,255,0.18); }
.copy-btn.copied { background: rgba(34,197,94,0.25); border-color: rgba(34,197,94,0.5); }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
}
th {
  background: var(--color-bg-soft);
  font-weight: 600;
  color: var(--color-text);
}
td code { white-space: nowrap; }

/* Lists */
ul, ol { padding-left: 22px; color: var(--color-text-soft); }
li { margin: 4px 0; }

/* Blockquote / callout */
blockquote {
  border-left: 3px solid var(--color-brand);
  background: var(--color-brand-soft);
  margin: 16px 0;
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text);
}
blockquote p { color: var(--color-text); margin: 4px 0; }

.callout {
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-brand);
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin: 20px 0;
}
.callout-title { font-weight: 600; margin-bottom: 4px; display: flex; align-items: center; gap: 8px; }
.callout.info    { border-left-color: #3b82f6; }
.callout.success { border-left-color: var(--color-success); }
.callout.warn    { border-left-color: var(--color-warning); }
.callout.danger  { border-left-color: var(--color-danger); }
.callout p { margin: 4px 0; color: var(--color-text-soft); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
[data-theme="dark"] .topbar { background: rgba(14,16,20,0.8); }

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--color-text); font-size: 17px; letter-spacing: -0.01em; }
.brand-logo {
  width: 28px; height: 28px;
  display: inline-block;
  object-fit: contain;
}
.brand-sub { font-size: 12px; color: var(--color-text-muted); font-weight: 500; margin-left: 2px; }

.nav-links { display: flex; gap: 4px; margin-left: 12px; }
.nav-links a {
  color: var(--color-text-soft);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.nav-links a:hover { background: var(--color-bg-soft); color: var(--color-text); }
.nav-links a.active { color: var(--color-brand); background: var(--color-brand-soft); }

.topbar-spacer { flex: 1; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  transition: all 0.15s;
  text-decoration: none;
  font-family: inherit;
}
.btn:hover { background: var(--color-bg-soft); border-color: var(--color-border-strong); color: var(--color-text); }
.btn-primary {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: #fff;
}
.btn-primary:hover { background: var(--color-link-hover); border-color: var(--color-link-hover); color: #fff; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { background: var(--color-bg-soft); }
.icon-btn { padding: 8px; }

.theme-toggle svg { width: 18px; height: 18px; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"]  .theme-toggle .icon-moon { display: none; }
:root:not([data-theme="dark"]) .theme-toggle .icon-sun { display: none; }

.mobile-toggle { display: none; }
@media (max-width: 900px) {
  .nav-links { display: none; }
  .mobile-toggle { display: inline-flex; }
  .topbar { padding: 0 16px; }
}

/* ---------- Hero (home) ---------- */
.hero {
  padding: 72px 24px 40px;
  text-align: center;
  background:
    radial-gradient(900px 360px at 50% -120px, rgba(47,111,235,0.12), transparent 60%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.hero-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-brand);
  background: var(--color-brand-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-title {
  font-size: 40px;
  line-height: 1.15;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.hero-subtitle {
  font-size: 16px;
  color: var(--color-text-soft);
  max-width: 640px;
  margin: 0 auto 28px;
}
.hero-search {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}
.hero-search input {
  width: 100%;
  padding: 14px 18px 14px 46px;
  font-size: 15px;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.hero-search input:focus { border-color: var(--color-brand); box-shadow: 0 0 0 3px rgba(47,111,235,0.15); }
.hero-search .icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  width: 18px; height: 18px;
  pointer-events: none;
}
.hero-tags { margin-top: 18px; display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; color: var(--color-text-muted); font-size: 13px; }
.hero-tags span { background: var(--color-bg-soft); padding: 4px 10px; border-radius: 999px; border: 1px solid var(--color-border); }

/* ---------- Section & cards (apifox-like) ---------- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

.section { padding: 48px 0 24px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
}
.section-title { font-size: 22px; margin: 0; }
.section-desc { color: var(--color-text-muted); font-size: 14px; margin: 4px 0 0; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
@media (max-width: 960px) { .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .card-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}
.card-head { display: flex; align-items: center; gap: 12px; }
.card-icon {
  width: 44px; height: 44px;
  flex-shrink: 0;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-soft);
  color: var(--color-brand);
}
.card-icon svg { width: 22px; height: 22px; }
.card-title { font-size: 16px; font-weight: 600; margin: 0; color: var(--color-text); }
.card-desc { font-size: 13.5px; color: var(--color-text-muted); margin: 0; }
.card-links { display: flex; flex-direction: column; gap: 2px; margin-top: 4px; }
.card-links a {
  font-size: 14px;
  color: var(--color-text-soft);
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 4px;
}
.card-links a::before {
  content: "›";
  color: var(--color-text-muted);
  font-size: 14px;
  transition: transform 0.15s;
}
.card-links a:hover { color: var(--color-brand); }
.card-links a:hover::before { transform: translateX(2px); color: var(--color-brand); }

/* Icon palette for cards */
.card-icon.i-green  { background: #e7f7ed; color: var(--color-success); }
.card-icon.i-amber  { background: #fef3e2; color: var(--color-warning); }
.card-icon.i-violet { background: #f0e8ff; color: #7f3df9; }
.card-icon.i-pink   { background: #fde8ef; color: #d63384; }
.card-icon.i-teal   { background: #dff5f1; color: #0e9488; }
[data-theme="dark"] .card-icon.i-green  { background: #0f2418; }
[data-theme="dark"] .card-icon.i-amber  { background: #2a1e0b; }
[data-theme="dark"] .card-icon.i-violet { background: #22142f; }
[data-theme="dark"] .card-icon.i-pink   { background: #2c1421; }
[data-theme="dark"] .card-icon.i-teal   { background: #0d2420; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 24px;
  color: var(--color-text-muted);
  font-size: 13px;
  margin-top: 64px;
  background: var(--color-bg-soft);
}
.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer a { color: var(--color-text-soft); margin: 0 8px; }
.footer a:hover { color: var(--color-brand); }