/* Autoview Unified Help Center */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --orange:      #FC7213;
  --orange-soft: #F68C46;
  --coal:        #333333;
  --elephant:    #BCB9B9;
  --font-ui:   'Space Grotesk', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-body: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --radius:    5px;
  --radius-sm: 3px;
  --nav-h:     52px;
  /* Dark theme (default) */
  --bg:           #333333;
  --bg-nav:       #2A2A2A;
  --bg-card:      #2C2C2C;
  --bg-raised:    #3D3D3D;
  --text:         #FFFFFF;
  --text-muted:   #BCB9B9;
  --text-dim:     #5E5C5B;
  --border:       rgba(255,255,255,0.07);
  --border-mid:   rgba(255,255,255,0.11);
  --border-strong:rgba(255,255,255,0.16);
  --shadow:       0 2px 14px rgba(0,0,0,0.45);
  --dot-pattern:  radial-gradient(circle, rgba(255,255,255,0.034) 1px, transparent 1px);
}
[data-theme="light"] {
  --bg:           #FFFFFF;
  --bg-nav:       #FAFAFA;
  --bg-card:      #F5F5F4;
  --bg-raised:    #EBEBEA;
  --text:         #333333;
  --text-muted:   #6B6B6A;
  --text-dim:     #9B9B9A;
  --border:       rgba(51,51,51,0.08);
  --border-mid:   rgba(51,51,51,0.12);
  --border-strong:rgba(51,51,51,0.18);
  --shadow:       0 2px 14px rgba(0,0,0,0.07);
  --dot-pattern:  none;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background-color: var(--bg);
  background-image: var(--dot-pattern);
  background-size: 28px 28px;
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--orange); text-decoration: none; }
a:hover { text-decoration: underline; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* -- Navigation -- */
.global-nav {
  position: sticky; top: 0; z-index: 200; height: var(--nav-h);
  display: flex; align-items: center; padding: 0 32px;
  background: var(--bg-nav); border-bottom: 1px solid var(--border); gap: 4px;
}
.nav-logo { display: flex; align-items: center; gap: 9px; text-decoration: none; margin-right: 20px; flex-shrink: 0; }
.nav-logo:hover { text-decoration: none; }
.nav-logo img { height: 20px; width: auto; display: block; }
.nav-wordmark { font-family: var(--font-ui); font-size: 0.9rem; font-weight: 700; letter-spacing: -0.01em; line-height: 1; }
.nav-auto { color: var(--text); }
.nav-view { color: var(--orange); }
.nav-links { display: flex; gap: 8px; flex: 1; align-items: center; }
.nav-link {
  font-family: var(--font-ui); font-size: 0.76rem; font-weight: 500;
  color: var(--text-muted); text-decoration: none; padding: 5px 10px;
  border-radius: var(--radius-sm); transition: color 0.15s, background 0.15s;
  white-space: nowrap; letter-spacing: 0.01em;
}
.nav-link:hover { color: var(--text); background: var(--bg-raised); text-decoration: none; }
.nav-back { font-size: 0.76rem; color: var(--text-muted); text-decoration: none; font-family: var(--font-ui); }
.nav-back:hover { color: var(--orange); text-decoration: none; }
.nav-search {
  flex: 1; max-width: 420px; display: flex; align-items: center;
  background: var(--bg-card); border: 1px solid var(--border-mid);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.nav-search:focus-within { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(252,114,19,0.10); }
.nav-search-prefix { font-family: var(--font-mono); font-size: 0.84rem; color: var(--orange); padding: 7px 4px 7px 10px; }
.nav-search input {
  flex: 1; background: none; border: none; outline: none;
  padding: 7px 10px 7px 4px; font-family: var(--font-mono); font-size: 0.80rem;
  color: var(--text); caret-color: var(--orange);
}
.nav-search input::placeholder { color: var(--text-dim); }
.theme-toggle {
  width: 30px; height: 30px; border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); background: var(--bg-raised); color: var(--text-muted);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: color 0.15s, border-color 0.15s; flex-shrink: 0; margin-left: 12px; padding: 0;
}
.theme-toggle:hover { color: var(--orange); border-color: var(--orange); }

/* -- Landing page -- */
.hero {
  text-align: center; padding: 64px 24px 48px;
  border-bottom: 1px solid var(--border);
}
.hero h1 { font-family: var(--font-ui); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; margin-bottom: 10px; letter-spacing: -0.02em; }
.hero p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 28px; }
.hero-search {
  display: flex; align-items: center; max-width: 540px; margin: 0 auto;
  background: var(--bg-card); border: 1px solid var(--border-mid);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.hero-search:focus-within { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(252,114,19,0.10); }
.hero-search-prefix { font-family: var(--font-mono); color: var(--orange); padding: 13px 6px 13px 16px; font-size: 0.9rem; }
.hero-search input {
  flex: 1; background: none; border: none; outline: none;
  padding: 13px 12px; font-family: var(--font-mono); font-size: 0.86rem;
  color: var(--text); caret-color: var(--orange);
}
.hero-search input::placeholder { color: var(--text-dim); }
.hero-search button {
  padding: 0 20px; height: 100%; border: none; background: var(--orange);
  color: #fff; font-family: var(--font-ui); font-weight: 600; font-size: 0.82rem;
  cursor: pointer; white-space: nowrap; transition: opacity 0.15s;
}
.hero-search button:hover { opacity: 0.9; }

.exchange-section { padding: 40px 40px 60px; max-width: 1200px; margin: 0 auto; }
.section-label {
  font-family: var(--font-ui); font-size: 0.70rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-dim);
  margin-bottom: 16px;
}
.exchange-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px;
}
.exchange-card {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 18px 12px 14px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-card);
  text-decoration: none; color: inherit; gap: 8px;
  transition: border-color 0.15s, background 0.15s;
  text-align: center; min-height: 90px;
}
.exchange-card:hover { border-color: var(--orange); background: var(--bg-raised); text-decoration: none; }
.exchange-card img { height: 28px; width: auto; object-fit: contain; }
.exchange-card-name { font-family: var(--font-ui); font-size: 0.82rem; font-weight: 600; color: var(--text); }
.exchange-card-count { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-dim); }
.browse-all {
  display: block; text-align: center; margin-top: 20px;
  font-family: var(--font-ui); font-size: 0.83rem; color: var(--orange);
}
.browse-all:hover { text-decoration: underline; }

/* -- Global index (index-all.html) -- */
.index-layout {
  display: grid; grid-template-columns: 220px 1fr;
  min-height: calc(100vh - var(--nav-h));
}
.exchange-sidebar {
  background: var(--bg-nav); border-right: 1px solid var(--border);
  padding: 20px 0; position: sticky; top: var(--nav-h);
  height: calc(100vh - var(--nav-h)); overflow-y: auto;
  scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent;
}
.exchange-sidebar .sidebar-label {
  padding: 0 16px 10px; font-family: var(--font-ui); font-size: 0.60rem;
  font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; color: var(--text-dim);
}
.exchange-option {
  display: flex; align-items: center; gap: 8px; padding: 7px 16px;
  cursor: pointer; border-left: 2px solid transparent;
  transition: background 0.12s, border-color 0.12s;
  font-family: var(--font-ui); font-size: 0.78rem; color: var(--text-muted);
}
.exchange-option:hover { background: var(--bg-raised); color: var(--text); }
.exchange-option.active { border-left-color: var(--orange); color: var(--orange); background: rgba(252,114,19,0.07); font-weight: 500; }
.exchange-option input[type="radio"] { display: none; }
.exchange-option img { height: 16px; width: 16px; object-fit: contain; border-radius: 2px; }
.exchange-option-name { flex: 1; }
.exchange-option-count { font-size: 0.68rem; color: var(--text-dim); font-family: var(--font-mono); }

.index-main { padding: 24px 32px 64px; }
.tab-bar { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--border); padding-bottom: 0; }
.tab-btn {
  font-family: var(--font-ui); font-size: 0.78rem; font-weight: 500;
  color: var(--text-muted); padding: 9px 16px; background: none; border: none;
  border-bottom: 2px solid transparent; cursor: pointer; margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--orange); border-bottom-color: var(--orange); }

.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 6px;
}
.card {
  display: block; background: var(--bg-card); border: 1px solid var(--border);
  border-left: 2px solid transparent; border-radius: var(--radius);
  padding: 11px 13px; text-decoration: none; color: inherit;
  transition: border-color 0.15s, background 0.15s, border-left-color 0.15s;
}
.card:hover { border-color: var(--border-mid); border-left-color: var(--orange); background: var(--bg-raised); text-decoration: none; }
.card-title { font-family: var(--font-ui); font-weight: 600; font-size: 0.82rem; color: var(--text); margin-bottom: 4px; letter-spacing: -0.01em; }
.card-desc { font-size: 0.73rem; color: var(--text-muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-badge { display: inline-block; font-family: var(--font-mono); font-size: 0.62rem; color: var(--text-dim); background: var(--bg-raised); border: 1px solid var(--border-mid); border-radius: 3px; padding: 1px 5px; margin-bottom: 5px; }
.no-results { padding: 40px; text-align: center; color: var(--text-dim); font-family: var(--font-ui); font-size: 0.85rem; }

/* -- Article pages -- */
.article-wrap { display: grid; grid-template-columns: 216px 1fr; min-height: calc(100vh - var(--nav-h)); }
.sidebar {
  background: var(--bg-nav); border-right: 1px solid var(--border);
  padding: 22px 0; position: sticky; top: var(--nav-h);
  height: calc(100vh - var(--nav-h)); overflow-y: auto;
  scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent;
}
.sidebar-label { padding: 0 16px 7px; font-family: var(--font-ui); font-size: 0.60rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; color: var(--text-dim); }
.sidebar-link {
  display: block; padding: 6px 16px; font-family: var(--font-ui); font-size: 0.77rem;
  font-weight: 400; color: var(--text-muted); text-decoration: none;
  border-left: 2px solid transparent; transition: color 0.15s, background 0.15s, border-color 0.15s; line-height: 1.35;
}
.sidebar-link:hover { color: var(--text); background: var(--bg-raised); text-decoration: none; }
.sidebar-link.active { color: var(--orange); border-left-color: var(--orange); background: rgba(252,114,19,0.07); font-weight: 500; }
.article-main { padding: 38px 60px 80px 46px; max-width: 820px; animation: fadeIn 0.25s ease both; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-family: var(--font-ui); font-size: 0.71rem; color: var(--text-dim); margin-bottom: 26px; }
.breadcrumb a { color: var(--text-muted); transition: color 0.15s; }
.breadcrumb a:hover { color: var(--orange); text-decoration: none; }
.breadcrumb-sep { color: var(--border-strong); }

/* -- Article typography -- */
.article-body h1 { font-family: var(--font-ui); font-weight: 700; font-size: clamp(1.4rem, 3vw, 1.85rem); color: var(--text); line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 13px; }
.article-body > p:first-of-type { font-size: 0.91rem; color: var(--text-muted); line-height: 1.75; margin-bottom: 26px; padding-bottom: 22px; border-bottom: 1px solid var(--border); }
.article-body h2 { font-family: var(--font-ui); font-weight: 600; font-size: 0.88rem; color: var(--text); margin: 30px 0 9px; letter-spacing: -0.01em; padding-left: 10px; border-left: 2px solid var(--orange); }
.article-body h3 { font-family: var(--font-ui); font-weight: 600; font-size: 0.73rem; color: var(--text-muted); margin: 20px 0 7px; text-transform: uppercase; letter-spacing: 0.09em; }
.article-body p { font-size: 0.89rem; color: var(--text); margin-bottom: 12px; line-height: 1.75; }
.article-body ul { list-style: none; padding: 0; margin: 0 0 16px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.article-body ul li { font-size: 0.83rem; color: var(--text); padding: 8px 13px; border-bottom: 1px solid var(--border); line-height: 1.55; background: var(--bg-card); }
.article-body ul li:last-child { border-bottom: none; }
.article-body code { font-family: var(--font-mono); font-size: 0.82em; color: var(--orange-soft, #F68C46); background: rgba(252,114,19,0.10); padding: 1px 5px; border-radius: 3px; border: 1px solid rgba(252,114,19,0.18); }
.article-body pre { background: #1C1C1C; border: 1px solid rgba(255,255,255,0.08); border-left: 3px solid var(--orange); border-radius: var(--radius); padding: 13px 16px; overflow-x: auto; margin: 13px 0; font-family: var(--font-mono); font-size: 0.80rem; color: #DEDEDE; line-height: 1.65; }
.article-body pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }
.code-comment { color: #666462; }
.article-body table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 0.80rem; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.article-body th { font-family: var(--font-ui); font-size: 0.63rem; font-weight: 700; letter-spacing: 0.10em; text-transform: uppercase; color: var(--text-muted); padding: 8px 12px; text-align: left; background: var(--bg-raised); border-bottom: 1px solid var(--border-mid); }
.article-body td { padding: 8px 12px; border-bottom: 1px solid var(--border); color: var(--text); vertical-align: top; line-height: 1.5; background: var(--bg-card); }
.article-body tr:last-child td { border-bottom: none; }
.article-body blockquote { border-left: 3px solid var(--orange); padding: 10px 16px; margin: 14px 0; background: var(--bg-card); border-radius: 0 var(--radius) var(--radius) 0; }
.article-body blockquote p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0; }

/* -- Footer -- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-nav); padding: 16px 32px; display: flex; align-items: center; justify-content: space-between; }
.footer-brand { display: flex; align-items: center; gap: 8px; }
.footer-brand img { height: 16px; width: auto; }
.footer-wordmark { font-family: var(--font-ui); font-weight: 700; font-size: 0.80rem; letter-spacing: -0.01em; }
.footer-auto { color: var(--text); }
.footer-view { color: var(--orange); }
.footer-right { font-family: var(--font-mono); font-size: 0.70rem; color: var(--text-dim); }

/* -- Responsive -- */
@media (max-width: 1100px) { .card-grid { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); } }
@media (max-width: 860px) {
  .index-layout { grid-template-columns: 1fr; }
  .exchange-sidebar { display: none; }
  .article-wrap { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .article-main { padding: 26px 22px 56px; }
  .global-nav { padding: 0 20px; }
  .index-main { padding: 20px; }
}
@media (max-width: 560px) {
  .card-grid { grid-template-columns: 1fr 1fr; }
  .exchange-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}