:root {
  --primary: #1677ff;
  --primary-bg: rgba(22,119,255,.08);
  --primary-light: #e8f0fe;
  --primary-gradient: linear-gradient(135deg, #1677ff, #5b8ff9);
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-hover: #f8f9fd;
  --text: #1d2129;
  --text-secondary: #4e5969;
  --text-muted: #86909c;
  --border: #e5e6eb;
  --border-light: #f2f3f5;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04);
  --shadow: 0 4px 16px rgba(0,0,0,.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.08);
  --shadow-hover: 0 12px 40px rgba(0,0,0,.12);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --header-h: 62px;
  --max-w: 1200px;
}

/* Dark mode */
[data-theme="dark"] {
  --primary: #4d8cff;
  --primary-bg: rgba(77,140,255,.12);
  --primary-light: #1a2744;
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-hover: #242736;
  --text: #e4e6eb;
  --text-secondary: #b0b3b8;
  --text-muted: #6c7080;
  --border: #2e313d;
  --border-light: #262933;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.2);
  --shadow: 0 4px 16px rgba(0,0,0,.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.4);
  --shadow-hover: 0 12px 40px rgba(0,0,0,.5);
}
[data-theme="dark"] header { background: rgba(26,29,39,.85); }
[data-theme="dark"] .auth-form { border-color: var(--border); }
[data-theme="dark"] .admin-table-wrap { border-color: var(--border); }
[data-theme="dark"] .admin-table th { background: var(--surface-hover); }
[data-theme="dark"] .tool-card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .tool-card:hover { border-color: var(--primary); }
[data-theme="dark"] .footer { border-top-color: var(--border); }
[data-theme="dark"] .ai-chat-modal { background: var(--surface); }
[data-theme="dark"] .ai-chat-msg.bot .bubble { background: var(--surface-hover); }
[data-theme="dark"] .ai-chat-footer textarea { background: var(--surface); color: var(--text); }
[data-theme="dark"] .add-form { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .stat-card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .category-btn { background: var(--surface); border-color: var(--border); color: var(--text-secondary); }
[data-theme="dark"] .category-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
[data-theme="dark"] .search-box input { background: var(--surface); color: var(--text); border-color: var(--border); }
[data-theme="dark"] .challenge-card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .challenge-card:hover { border-color: var(--primary); }
[data-theme="dark"] .error-page .actions .btn-secondary { background: var(--surface); }

/* Theme toggle */
.theme-toggle {
  background: none; border: none; cursor: pointer; font-size: 18px;
  padding: 6px; border-radius: 50%; transition: all .2s;
  color: var(--text-secondary); line-height: 1;
}
.theme-toggle:hover { background: var(--primary-bg); }

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
main { flex: 1; }

@media (max-width: 480px) {
  main { padding: 0 12px; }
}

/* Header */
header {
  background: rgba(255,255,255,.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav { display: flex; align-items: center; gap: 2px; }

nav a {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: all .2s;
  white-space: nowrap;
}

nav a:hover { color: var(--primary); background: var(--primary-bg); }

nav a.active {
  color: var(--primary);
  font-weight: 600;
  background: var(--primary-bg);
}

.admin-link {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 6px 16px !important;
  border-radius: var(--radius-sm) !important;
  font-size: 13px !important;
}

.admin-link:hover { opacity: .88 !important; background: var(--primary) !important; }

/* Hero */
.hero {
  text-align: center;
  padding: 64px 24px 48px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);
}

.hero h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -.5px;
}

.hero p {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.search-bar {
  position: relative;
  max-width: 420px;
  margin: 0 auto;
}

.search-bar input {
  width: 100%;
  padding: 11px 16px 11px 42px;
  border: 2px solid var(--border);
  border-radius: var(--radius-xl);
  font-size: 14px;
  outline: none;
  transition: all .25s;
  background: var(--surface);
  box-sizing: border-box;
}

.search-bar input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-bg);
}

.search-bar .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  pointer-events: none;
}

/* Categories */
.categories {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cat-btn {
  padding: 6px 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all .2s;
}

.cat-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-bg);
}

.cat-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(22,119,255,.25);
}

/* Tool Grid */
.tool-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 60px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  text-align: center;
  cursor: pointer;
  transition: all .35s cubic-bezier(.4,0,.2,1);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity .3s;
}

.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.tool-card:hover::before { opacity: 1; }

.tool-card .card-icon { font-size: 44px; margin-bottom: 14px; display: block; }

.tool-card .card-category {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 11px;
  background: var(--primary-bg);
  padding: 2px 10px;
  border-radius: 4px;
  color: var(--primary);
  font-weight: 500;
}

.tool-card h3 { font-size: 16px; margin-bottom: 8px; color: var(--text); }

.tool-card p { font-size: 13px; color: var(--text-muted); line-height: 1.5; }

/* Tool Page */
.tool-breadcrumb {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 13px;
  color: var(--text-muted);
}

.tool-breadcrumb a { color: var(--primary); }

.tool-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 24px 60px;
}

.tool-container .loading,
.tool-container .error {
  text-align: center;
  padding: 80px 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* Footer */
footer {
  margin-top: auto;
  text-align: center;
  padding: 32px 24px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.loading::after {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Ad placeholder */
.ad-placeholder {
  max-width: var(--max-w);
  margin: 0 auto 24px;
  padding: 0 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 28px; }
  .tool-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; padding: 0 16px 40px; }
  .tool-card { padding: 20px 16px; }
  .tool-card .card-icon { font-size: 34px; }
  .categories { overflow-x: auto; flex-wrap: nowrap; padding: 0 16px 16px; }
  .header-inner { padding: 0 16px; }
  nav a { padding: 4px 7px; font-size: 12px; }
  .hero { padding: 40px 16px 32px; }
  .hero p { font-size: 14px; }
}

@media (max-width: 480px) {
  .tool-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .tool-card { padding: 16px 12px; }
  .tool-card .card-icon { font-size: 28px; }
  .hero h1 { font-size: 22px; }
  .logo { font-size: 17px; }
  nav { gap: 0; }
  nav a { padding: 5px 8px; font-size: 12px; }
  .tool-card p { display: none; }
  nav a { padding: 4px 6px; font-size: 11px; }
  .header-inner { padding: 0 12px; }
  .logo { font-size: 15px; }
}

/* AI Chat Widget */
.ai-chat-btn {
  position: fixed; bottom: 120px; right: 24px; z-index: 9999;
  width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, #1677ff, #5b8ff9, #1677ff);
  background-size: 200% 200%;
  animation: aiBtnGradient 3s ease infinite;
  color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; box-shadow: 0 6px 24px rgba(22,119,255,.4);
  transition: all .3s cubic-bezier(.4,0,.2,1);
  z-index: 9999;
}
.ai-chat-btn::after {
  content: ''; position: absolute; inset: -4px; border-radius: 50%;
  background: linear-gradient(135deg, #1677ff, #5b8ff9);
  opacity: .25; z-index: -1;
  animation: aiBtnRipple 2s ease-in-out infinite;
}
@keyframes aiBtnGradient { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
@keyframes aiBtnRipple { 0%,100% { transform: scale(1); opacity: .25; } 50% { transform: scale(1.2); opacity: .1; } }
.ai-chat-btn:hover { transform: scale(1.12); box-shadow: 0 8px 32px rgba(22,119,255,.5); }
.ai-chat-btn:active { transform: scale(.95); }
.ai-chat-btn:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(22,119,255,.45); }
.ai-chat-btn:active { transform: scale(.95); }

.ai-chat-overlay {
  position: fixed; inset: 0; z-index: 9998;
  background: rgba(0,0,0,.3); opacity: 0; pointer-events: none;
  transition: opacity .25s;
}
.ai-chat-overlay.show { opacity: 1; pointer-events: auto; }

.ai-chat-modal {
  position: fixed; bottom: 88px; right: 24px; z-index: 9999;
  width: 380px; max-height: 560px;
  background: var(--surface); border-radius: var(--radius-lg);
  box-shadow: 0 12px 48px rgba(0,0,0,.15);
  display: flex; flex-direction: column;
  opacity: 0; pointer-events: none;
  transform: translateY(16px) scale(.96);
  transition: all .25s cubic-bezier(.4,0,.2,1);
  overflow: hidden;
}
.ai-chat-modal.show { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }

.ai-chat-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--border-light);
  background: var(--primary-gradient); color: #fff;
}
.ai-chat-header h3 { font-size: 15px; font-weight: 600; margin: 0; display: flex; align-items: center; gap: 6px; }
.ai-chat-header .close-btn {
  background: none; border: none; color: rgba(255,255,255,.8); cursor: pointer;
  font-size: 18px; padding: 2px; line-height: 1; border-radius: 4px;
  transition: all .15s;
}
.ai-chat-header .close-btn:hover { background: rgba(255,255,255,.15); color: #fff; }

.ai-chat-body {
  flex: 1; overflow-y: auto; padding: 12px 16px;
  min-height: 200px; max-height: 380px;
  scroll-behavior: smooth;
}
.ai-chat-body::-webkit-scrollbar { width: 4px; }
.ai-chat-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.ai-chat-msg {
  margin-bottom: 12px; display: flex; gap: 8px;
  animation: msgIn .25s ease-out;
}
@keyframes msgIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.ai-chat-msg .avatar {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; margin-top: 2px;
}
.ai-chat-msg.user .avatar { background: var(--primary-bg); }
.ai-chat-msg.bot .avatar { background: linear-gradient(135deg,#667eea,#764ba2); color: #fff; }

.ai-chat-msg .bubble {
  padding: 8px 12px; border-radius: 12px; font-size: 13px; line-height: 1.6;
  max-width: 85%; word-break: break-word;
}
.ai-chat-msg.user { flex-direction: row-reverse; }
.ai-chat-msg.user .bubble {
  background: var(--primary); color: #fff;
  border-bottom-right-radius: 4px;
}
.ai-chat-msg.bot .bubble {
  background: var(--bg); color: var(--text);
  border-bottom-left-radius: 4px;
}
.ai-chat-msg .bubble.typing {
  display: flex; align-items: center; gap: 4px; padding: 12px 16px;
}
.ai-chat-msg .bubble.typing span {
  width: 6px; height: 6px; border-radius: 50%; background: var(--text-muted);
  animation: typingDot 1.2s infinite;
}
.ai-chat-msg .bubble.typing span:nth-child(2) { animation-delay: .2s; }
.ai-chat-msg .bubble.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes typingDot { 0%,60%,100% { opacity: .3; } 30% { opacity: 1; } }

.ai-remaining { font-size:11px; color:var(--text-muted); text-align:center; padding:2px 0 4px; }
.ai-chat-footer {
  padding: 10px 12px; border-top: 1px solid var(--border-light);
  display: flex; gap: 8px; align-items: flex-end;
}
.ai-chat-footer textarea {
  flex: 1; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 12px; font-size: 13px; resize: none; outline: none;
  font-family: inherit; min-height: 36px; max-height: 80px;
  transition: border-color .2s;
}
.ai-chat-footer textarea:focus { border-color: var(--primary); }
.ai-chat-footer .send-btn {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--primary); color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; transition: all .15s; flex-shrink: 0;
}
.ai-chat-footer .send-btn:hover { opacity: .88; }
.ai-chat-footer .send-btn:disabled { opacity: .4; cursor: not-allowed; }

.ai-chat-placeholder {
  text-align: center; padding: 40px 20px; color: var(--text-muted);
}
.ai-chat-placeholder .icon { font-size: 36px; margin-bottom: 8px; }
.ai-chat-placeholder p { font-size: 13px; }

.ai-quick-actions { display:grid; grid-template-columns:1fr 1fr; gap:6px; margin-top:12px; }
.ai-quick-btn { padding:6px 10px; border:1px solid var(--border); border-radius:8px; background:var(--surface); cursor:pointer; font-size:12px; color:var(--text-secondary); transition:all .15s; white-space:nowrap; text-align:center; }
.ai-quick-btn:hover { border-color:var(--primary); color:var(--primary); background:var(--primary-bg); }

@media (max-width: 480px) {
  .ai-chat-modal { width: calc(100vw - 32px); right: 16px; bottom: 80px; max-height: 60vh; }
  .ai-chat-btn { bottom: 100px; right: 16px; width: 54px; height: 54px; font-size: 24px; }
}


/* Back to top */
.back-to-top {
  position: fixed; bottom: 196px; right: 24px; z-index: 9997;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-secondary); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: all .25s;
}
.back-to-top.show { opacity: 1; pointer-events: auto; }
.back-to-top:hover { color: var(--primary); border-color: var(--primary); }

/* Skeleton loading */
@keyframes skeletonShine { 0% { background-position: -200px 0; } 100% { background-position: calc(200px + 100%) 0; } }
.skeleton-card {
  border-radius: var(--radius); padding: 24px 20px;
  background: var(--surface); border: 1px solid var(--border-light);
}
.skeleton-card .skeleton-icon {
  width: 48px; height: 48px; border-radius: 12px; margin-bottom: 12px;
  background: linear-gradient(90deg, var(--border-light) 25%, var(--surface-hover) 50%, var(--border-light) 75%);
  background-size: 200px 100%; animation: skeletonShine 1.5s infinite;
}
.skeleton-card .skeleton-line {
  height: 14px; border-radius: 4px; margin-bottom: 8px;
  background: linear-gradient(90deg, var(--border-light) 25%, var(--surface-hover) 50%, var(--border-light) 75%);
  background-size: 200px 100%; animation: skeletonShine 1.5s infinite;
}
.skeleton-card .skeleton-line.short { width: 60%; }
.skeleton-card .skeleton-line.tiny { width: 40%; height: 10px; margin-bottom: 0; }

/* Recent & Favorites section on homepage */
.section-header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 16px; }
.section-header h2 { font-size: 18px; font-weight: 600; }
.section-header .clear-btn { font-size: 12px; color: var(--text-muted); cursor: pointer; background: none; border: none; }
.section-header .clear-btn:hover { color: var(--primary); }

.fav-btn {
  background: none; border: none; cursor: pointer; font-size: 18px;
  padding: 4px; border-radius: 50%; transition: all .2s; line-height: 1;
  color: var(--text-muted);
}
.fav-btn.active { color: #faad14; }
.fav-btn:hover { transform: scale(1.15); }

@media (max-width: 480px) {
  .back-to-top { right: 16px; bottom: 170px; width: 40px; height: 40px; font-size: 16px; }
}
/* Tool history & rating */
.tool-history { margin-top: 24px; padding: 16px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); }
.tool-history h3 { font-size:14px; font-weight:600; margin-bottom:8px; }
.tool-history .item { font-size:12px; color:var(--text-muted); padding:6px 0; border-bottom:1px solid var(--border); }
.tool-history .item:last-child { border-bottom:none; }
.star-rating { display:inline-flex; gap:4px; margin-left:12px; }
.star-rating .star { cursor:pointer; font-size:18px; color:var(--border); transition:color .2s; }
.star-rating .star.active { color:#faad14; }
.star-rating .star:hover { color:#fadb14; }
.admin-filter { display:flex; gap:8px; margin-bottom:12px; flex-wrap:wrap; }
.admin-filter input, .admin-filter select { padding:8px 12px; border:1px solid var(--border); border-radius:var(--radius-sm); font-size:13px; background:var(--surface); color:var(--text); }
.dashboard-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:12px; margin-bottom:20px; }
.dashboard-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:16px; text-align:center; }
.dashboard-card .num { font-size:28px; font-weight:700; color:var(--primary); }
.dashboard-card .label { font-size:12px; color:var(--text-muted); margin-top:4px; }
.dashboard-chart { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:16px; margin-bottom:16px; }
.dashboard-chart h3 { font-size:14px; font-weight:600; margin-bottom:12px; }
.dashboard-chart .bar-chart { display:flex; flex-direction:column; gap:4px; }
.dashboard-chart .bar-row { display:flex; align-items:center; gap:8px; }
.dashboard-chart .bar-row .bar-label { width:60px; font-size:12px; text-align:right; flex-shrink:0; }
.dashboard-chart .bar-row .bar-fill { height:18px; background:var(--primary); border-radius:3px; min-width:2px; transition:width .5s; }
.dashboard-chart .bar-row .bar-count { font-size:11px; color:var(--text-muted); }
/* Dropdown nav */
.nav-dropdown { position:relative; display:flex; align-items:center; }
.nav-dropdown > a { font-size:14px; color:var(--text-secondary); padding:7px 14px; border-radius:var(--radius-sm); transition:all .2s; white-space:nowrap; cursor:pointer; text-decoration:none; }
.nav-dropdown:hover > a { color:var(--primary); background:var(--primary-bg); }
.nav-dropdown > a.active { color:var(--primary); font-weight:600; background:var(--primary-bg); }
.nav-dropdown .arrow { font-size:10px; margin-left:2px; }
.nav-dropdown-menu { display:none; position:absolute; top:100%; left:0; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm); box-shadow:var(--shadow); min-width:130px; z-index:100; padding:4px 0; }
.nav-dropdown-menu a { display:block; padding:8px 16px; font-size:13px; color:var(--text-secondary); white-space:nowrap; text-decoration:none; transition:background .15s; }
.nav-dropdown-menu a:hover { background:var(--primary-bg); color:var(--primary); }
.nav-dropdown:hover .nav-dropdown-menu { display:block; }
[data-theme="dark"] .nav-dropdown-menu { background:var(--surface); border-color:var(--border); }
[data-theme="dark"] .nav-dropdown-menu a { color:var(--text-secondary); }
[data-theme="dark"] .nav-dropdown-menu a:hover { background:var(--primary-bg); }
@media(max-width:768px){.nav-dropdown > a{padding:6px 10px;font-size:13px}}
.sa-chart { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:16px 20px; margin-bottom:16px; display:none; }
.sa-chart svg { display:block; }
.sa-chart h3 { font-size:14px; font-weight:600; margin-bottom:8px; }

/* Change table */
.sa-table { width:100%; border-collapse:collapse; font-size:13px; margin-top:8px; }
.sa-table th, .sa-table td { padding:8px 12px; text-align:center; border-bottom:1px solid var(--border-light); }
.sa-table th { font-weight:600; color:var(--text-muted); font-size:12px; }
.sa-table .up { color:#f25a47; }
.sa-table .down { color:#00b42a; }
/* ===== Game Guide Mobile Responsive ===== */
@media (max-width: 640px) {
  .header-inner { padding: 0 12px; }
  .nav { gap: 8px; font-size: 12px; overflow-x: auto; -webkit-overflow-scrolling: touch; padding: 0 4px; }
  .nav a { white-space: nowrap; padding: 4px 6px; }
  .grid { grid-template-columns: 1fr !important; gap: 14px !important; padding: 0 12px 40px !important; }
  .card .banner { height: 140px; }
  .hero { padding: 40px 16px 36px !important; }
  .hero h1 { font-size: 22px !important; }
  .hero .stats { gap: 16px !important; font-size: 12px !important; }
  .search-wrap { padding: 0 12px !important; }
  .latest-bar { padding: 0 12px !important; }
  .guide-detail { padding: 0 12px !important; flex-direction: column !important; }
  .gd-content { width: 100% !important; }
  .gd-sidebar { width: 100% !important; margin-left: 0 !important; }
  .gu-hdr h1 { font-size: 20px !important; }
  .game-info-card { flex-direction: column !important; text-align: center !important; }
  .game-info-card .gi-cover { width: 100% !important; max-width: 200px !important; margin: 0 auto !important; }
  .comments-tree { padding: 0 !important; }
  .comment-item { padding: 10px !important; }
  .gd-toc { position: static !important; width: 100% !important; margin-bottom: 16px !important; max-height: none !important; }
  .gd-actions { flex-wrap: wrap !important; gap: 8px !important; }
  .gd-actions button { font-size: 12px !important; padding: 8px 14px !important; }
  .pl-section { padding: 16px !important; }
  .quiz-container { padding: 0 12px !important; }
  .quiz-question { padding: 20px 16px !important; }
  .quiz-options { grid-template-columns: 1fr !important; }
  .leaderboard-table { font-size: 12px !important; }
  .lb-tabs { gap: 2px !important; }
  .lb-tab { padding: 6px 12px !important; font-size: 12px !important; }
  .guides-filter { flex-wrap: wrap !important; gap: 8px !important; }
  .guides-filter select { width: 100% !important; }
  .pagination { gap: 4px !important; }
  .pagination a, .pagination span { padding: 6px 10px !important; font-size: 12px !important; }
  .admin-page { padding: 16px 12px !important; }
  .admin-nav { overflow-x: auto; -webkit-overflow-scrolling: touch; gap: 0 !important; }
  .admin-nav a { white-space: nowrap; font-size: 12px !important; padding: 8px 10px !important; }
  table { font-size: 12px !important; }
  th, td { padding: 6px 8px !important; }
  .stats-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 10px !important; }
  .footer-links { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .footer-links a { white-space: nowrap; }
  .bp-page { padding: 20px 12px !important; }
  .bp-stats { grid-template-columns: repeat(3, 1fr) !important; }
  .drop-page { padding: 20px 12px !important; }
  .ad-page { padding: 20px 12px !important; }
}