:root {
  color-scheme: dark;
  
  /* Standard Dark Mode Tokens */
  --bg: #0B0C0F;
  
  --panel: #16181D;
  --panel-hover: #1C1E24;
  
  --border: #2C2E36;
  --divider: #2C2E36;
  
  --text: rgba(255, 255, 255, 0.88);
  --text-strong: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.60);
  --muted: rgba(255, 255, 255, 0.40);
  
  --link: #4DA3FF;
  --link-hover: #78BBFF;
  
  --accent: #0A84FF;
  --accent-hover: #409CFF;
  
  --danger: #ff453a;
  
  --radius: 12px;
  --radius-sm: 8px;
  --radius-btn: 8px;
  
  --container: 1120px;
  --header-h: 64px;
}

html {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
}

/* Global Safety */
img, svg, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout */
.wrap, .container, main {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

main {
  flex: 1;
  padding-bottom: 64px;
}

/* Page Containers */
.doc-container, .support-container {
  padding-top: 60px;
  max-width: 800px;
  margin: 0 auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong);
  margin-top: 0;
  line-height: 1.3;
}

h1 { font-size: 32px; font-weight: 700; margin-bottom: 16px; }
h2 { font-size: 24px; font-weight: 600; margin-bottom: 16px; }
h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }

p { margin: 0 0 16px; }

/* Links */
a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s ease, opacity 0.2s ease;
  text-decoration: none !important;
}
.btn:active { opacity: 0.8; }

.btn-primary {
  background: var(--accent);
  color: #fff !important;
}
.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: #2C2E36;
  color: var(--text-strong) !important;
  border: 1px solid transparent;
}
.btn-secondary:hover {
  background: #3A3D47;
}

.btn-row {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* Header */
.topbar {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-strong) !important;
}

.logo-icon {
  width: 28px; height: 28px;
  background: var(--accent);
  border-radius: 6px;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary) !important;
  text-decoration: none !important;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: var(--text-strong) !important;
}

.nav-link.active {
  color: var(--text-strong) !important;
  border-bottom-color: var(--accent);
}

.nav-toggle { display: none; }

/* Language Toggle */
.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
}
.lang-btn.active {
  background: var(--panel-hover);
  color: var(--text-strong);
  font-weight: 600;
}
.lang-btn:hover {
  color: var(--text-strong);
}

/* Hero */
.hero {
  padding: 100px 0 40px;
  max-width: 800px;
}
.hero h1 { font-size: 40px; margin-bottom: 20px; }
.hero p { font-size: 18px; color: var(--text-secondary); max-width: 600px; }

/* Cards & Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: block;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.card:hover {
  border-color: var(--accent);
  background: var(--panel-hover);
  text-decoration: none;
}

.card h3 { margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 0; }

/* Tags */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  background: rgba(255,255,255,0.1);
  color: var(--text-secondary);
}
.status-beta { background: rgba(10, 132, 255, 0.15); color: var(--accent); }
.status-soon { background: rgba(255, 255, 255, 0.08); color: var(--muted); }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}
input, select, textarea, .form-input, .form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-strong);
  border-radius: 8px;
  font-size: 15px;
  box-sizing: border-box;
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
textarea { min-height: 120px; resize: vertical; }

/* Screenshots Section */
.ss-section { margin-top: 40px; }
.ss-tabs { margin-bottom: 20px; display: flex; gap: 12px; }
.ss-tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
}
.ss-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}
.ss-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.ss-item {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: zoom-in;
}
.ss-item:hover { border-color: var(--text-secondary); }

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.9);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}
.lightbox.open { display: flex; }
.lb-frame img { max-height: 90vh; max-width: 90vw; }
.lb-close {
  position: absolute; top: 20px; right: 20px;
  background: none; border: none; color: white;
  font-size: 32px; cursor: pointer;
}
.lb-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: white;
  font-size: 40px; cursor: pointer; padding: 20px;
}
.lb-prev { left: 20px; }
.lb-next { right: 20px; }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 40px;
  color: var(--text-secondary);
  font-size: 14px;
  text-align: center;
}
.footer-links { margin-bottom: 16px; display: flex; gap: 20px; justify-content: center; }
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-strong); }

/* Language Logic */
[data-lang-root="en"] .zh { display: none !important; }
[data-lang-root="zh-hant"] .en { display: none !important; }
.badge-disabled { opacity: 0.6; pointer-events: none; }