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

:root {
  --bg: #fafaf9;
  --bg-warm: #f5f0eb;
  --bg-card: #ffffff;
  --bg-dark: #1a1a1a;
  --bg-dark-soft: #2a2a2a;
  --border: rgba(0,0,0,0.06);
  --border-strong: rgba(0,0,0,0.1);
  --text: #1a1a1a;
  --text-mid: #4a4a4a;
  --text-soft: #888888;
  --text-inv: #ffffff;
  --orange: #ff6b35;
  --orange-soft: #fff0e8;
  --violet: #7c5cfc;
  --violet-soft: #f0edff;
  --teal: #0d9488;
  --teal-soft: #e6f7f5;
  --rose: #e11d48;
  --rose-soft: #ffe4ea;
  --blue: #2563eb;
  --blue-soft: #e8f0fe;
  --lime: #65a30d;
  --lime-soft: #f0fbe4;
  --sidebar-bg: #ffffff;
  --sidebar-border: rgba(0,0,0,0.08);
  --sidebar-hover: rgba(0,0,0,0.04);
  --sidebar-active: var(--orange-soft);
  --topbar-bg: rgba(250,250,249,0.88);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xl: 24px;
  --sidebar-w: 250px;
  --topbar-h: 56px;
}

[data-theme="dark"] {
  --bg: #111111;
  --bg-warm: #1a1a1a;
  --bg-card: #1e1e1e;
  --bg-dark: #0a0a0a;
  --bg-dark-soft: #2a2a2a;
  --border: rgba(255,255,255,0.07);
  --border-strong: rgba(255,255,255,0.12);
  --text: #e8e8e8;
  --text-mid: #a0a0a0;
  --text-soft: #666666;
  --text-inv: #111111;
  --orange-soft: rgba(255,107,53,0.12);
  --violet-soft: rgba(124,92,252,0.12);
  --teal-soft: rgba(13,148,136,0.12);
  --rose-soft: rgba(225,29,72,0.12);
  --blue-soft: rgba(37,99,235,0.12);
  --lime-soft: rgba(101,163,13,0.12);
  --sidebar-bg: #161616;
  --sidebar-border: rgba(255,255,255,0.06);
  --sidebar-hover: rgba(255,255,255,0.05);
  --sidebar-active: rgba(255,107,53,0.12);
  --topbar-bg: rgba(17,17,17,0.88);
}

[data-color-theme="cool"] {
  --bg: #f0f2f5;
  --bg-warm: #e8ecf0;
  --bg-card: #ffffff;
  --border: rgba(0,0,0,0.06);
  --border-strong: rgba(0,0,0,0.1);
  --text: #1e293b;
  --text-mid: #475569;
  --text-soft: #94a3b8;
  --orange: #4f6df5;
  --orange-soft: #eef1fe;
  --sidebar-bg: #f8f9fc;
  --sidebar-border: rgba(0,0,0,0.06);
  --sidebar-hover: rgba(79,109,245,0.06);
  --sidebar-active: rgba(79,109,245,0.1);
  --topbar-bg: rgba(240,242,245,0.88);
}

[data-color-theme="rose"] {
  --bg: #fdf2f4;
  --bg-warm: #fce7eb;
  --bg-card: #ffffff;
  --border: rgba(0,0,0,0.05);
  --border-strong: rgba(0,0,0,0.09);
  --text: #1a1a2e;
  --text-mid: #4a4a5a;
  --text-soft: #9a8c98;
  --orange: #e11d58;
  --orange-soft: #fce7eb;
  --sidebar-bg: #fef7f8;
  --sidebar-border: rgba(225,29,88,0.08);
  --sidebar-hover: rgba(225,29,88,0.05);
  --sidebar-active: rgba(225,29,88,0.1);
  --topbar-bg: rgba(253,242,244,0.88);
}

[data-color-theme="forest"] {
  --bg: #f0f5f0;
  --bg-warm: #e4ede4;
  --bg-card: #f9fcf9;
  --border: rgba(0,0,0,0.06);
  --border-strong: rgba(0,0,0,0.1);
  --text: #1a2e1a;
  --text-mid: #3d5a3d;
  --text-soft: #7a9a7a;
  --orange: #16794a;
  --orange-soft: #e0f2e8;
  --sidebar-bg: #f4f9f4;
  --sidebar-border: rgba(22,121,74,0.08);
  --sidebar-hover: rgba(22,121,74,0.05);
  --sidebar-active: rgba(22,121,74,0.1);
  --topbar-bg: rgba(240,245,240,0.88);
}

[data-color-theme="sand"] {
  --bg: #f5f0e8;
  --bg-warm: #ede5d8;
  --bg-card: #faf7f2;
  --border: rgba(0,0,0,0.06);
  --border-strong: rgba(0,0,0,0.1);
  --text: #2e2418;
  --text-mid: #5a4d3a;
  --text-soft: #9a8d7a;
  --orange: #b8860b;
  --orange-soft: #f5ecd4;
  --sidebar-bg: #f8f4ed;
  --sidebar-border: rgba(184,134,11,0.08);
  --sidebar-hover: rgba(184,134,11,0.05);
  --sidebar-active: rgba(184,134,11,0.1);
  --topbar-bg: rgba(245,240,232,0.88);
}

[data-color-theme="ocean"] {
  --bg: #0d1b2a;
  --bg-warm: #132234;
  --bg-card: #1b2838;
  --bg-dark: #060f1a;
  --bg-dark-soft: #1b2838;
  --border: rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.1);
  --text: #e0e8f0;
  --text-mid: #8ba4c0;
  --text-soft: #5a7a9a;
  --text-inv: #0d1b2a;
  --orange: #00b4d8;
  --orange-soft: rgba(0,180,216,0.12);
  --violet: #48bfe3;
  --violet-soft: rgba(72,191,227,0.12);
  --sidebar-bg: #132234;
  --sidebar-border: rgba(255,255,255,0.06);
  --sidebar-hover: rgba(0,180,216,0.08);
  --sidebar-active: rgba(0,180,216,0.14);
  --topbar-bg: rgba(13,27,42,0.88);
}

[data-color-theme="nord"] {
  --bg: #2e3440;
  --bg-warm: #3b4252;
  --bg-card: #3b4252;
  --bg-dark: #242933;
  --bg-dark-soft: #434c5e;
  --border: rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.1);
  --text: #eceff4;
  --text-mid: #d8dee9;
  --text-soft: #7b88a1;
  --text-inv: #2e3440;
  --orange: #88c0d0;
  --orange-soft: rgba(136,192,208,0.12);
  --violet: #b48ead;
  --violet-soft: rgba(180,142,173,0.12);
  --sidebar-bg: #2e3440;
  --sidebar-border: rgba(255,255,255,0.06);
  --sidebar-hover: rgba(136,192,208,0.08);
  --sidebar-active: rgba(136,192,208,0.14);
  --topbar-bg: rgba(46,52,64,0.88);
}

[data-color-theme="dracula"] {
  --bg: #282a36;
  --bg-warm: #2e303e;
  --bg-card: #343746;
  --bg-dark: #1e1f29;
  --bg-dark-soft: #3c3f58;
  --border: rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.1);
  --text: #f8f8f2;
  --text-mid: #c0bfbc;
  --text-soft: #6272a4;
  --text-inv: #282a36;
  --orange: #bd93f9;
  --orange-soft: rgba(189,147,249,0.12);
  --violet: #ff79c6;
  --violet-soft: rgba(255,121,198,0.12);
  --sidebar-bg: #282a36;
  --sidebar-border: rgba(255,255,255,0.06);
  --sidebar-hover: rgba(189,147,249,0.08);
  --sidebar-active: rgba(189,147,249,0.14);
  --topbar-bg: rgba(40,42,54,0.88);
}

[data-color-theme="monokai"] {
  --bg: #272822;
  --bg-warm: #2e2f28;
  --bg-card: #333429;
  --bg-dark: #1d1e18;
  --bg-dark-soft: #3e3d32;
  --border: rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.1);
  --text: #f8f8f2;
  --text-mid: #c0c0b0;
  --text-soft: #75715e;
  --text-inv: #272822;
  --orange: #a6e22e;
  --orange-soft: rgba(166,226,46,0.12);
  --violet: #66d9ef;
  --violet-soft: rgba(102,217,239,0.12);
  --sidebar-bg: #272822;
  --sidebar-border: rgba(255,255,255,0.06);
  --sidebar-hover: rgba(166,226,46,0.08);
  --sidebar-active: rgba(166,226,46,0.14);
  --topbar-bg: rgba(39,40,34,0.88);
}

html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

@keyframes rise { from { opacity:0; transform:translateY(40px) scale(.97); } to { opacity:1; transform:none; } }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
@keyframes slideUp { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:none; } }
@keyframes shimmer { 0% { background-position:-400% 0; } 100% { background-position:400% 0; } }
@keyframes marquee { 0% { transform:translateX(0); } 100% { transform:translateX(-50%); } }

.rise { animation: rise .6s var(--ease) forwards; opacity:0; }
.fade-in { animation: fadeIn .4s ease forwards; opacity:0; }
.slide-up { animation: slideUp .4s var(--ease) forwards; opacity:0; }
.reveal { opacity:0; transform:translateY(40px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity:1; transform:none; }

.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: width .3s var(--ease), transform .3s var(--ease);
  overflow: hidden;
}
.sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  height: var(--topbar-h);
  flex-shrink: 0;
  border-bottom: 1px solid var(--sidebar-border);
  cursor: pointer;
  transition: padding .3s var(--ease);
}
.sidebar-logo {
  width: 32px; height: 32px;
  border-radius: 9px;
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: transform .3s var(--ease);
  overflow: hidden;
}
.sidebar-logo img { width: 100%; height: 100%; object-fit: contain; }
.sidebar-header:hover .sidebar-logo { transform: rotate(-8deg) scale(1.08); }
.sidebar-brand {
  font-family: var(--font-display);
  font-size: 20px; color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity .2s, width .3s var(--ease);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 10px;
}
.sidebar-nav-label {
  font-size: 10px; font-weight: 700;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 8px 10px 6px;
  white-space: nowrap;
  transition: opacity .2s;
}
.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all .2s var(--ease);
  margin-bottom: 1px;
  text-decoration: none;
  color: var(--text-mid);
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-nav-item:hover { background: var(--sidebar-hover); color: var(--text); }
.sidebar-nav-item.active { background: var(--sidebar-active); color: var(--orange); font-weight: 600; }
.sidebar-item-icon {
  width: 22px; height: 22px;
  border-radius: 7px;
  display: grid; place-items: center;
  font-size: 13px; flex-shrink: 0;
  background: none !important;
  transition: transform .25s var(--ease);
}
.sidebar-nav-item:hover .sidebar-item-icon { transform: scale(1.12); }
.sidebar-item-text {
  flex: 1; font-size: 13px; font-weight: 500;
  min-width: 0; overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-item-arrow {
  color: var(--text-soft); flex-shrink: 0;
  transition: transform .25s var(--ease), opacity .2s;
}
.sidebar-item-arrow svg { width: 10px; height: 10px; }
.sidebar-nav-item.expanded .sidebar-item-arrow { transform: rotate(90deg); }

.sidebar-sub-list {
  overflow: hidden;
  max-height: 0;
  transition: max-height .35s var(--ease);
}
.sidebar-sub-list.open { max-height: 2000px; }
.sidebar-sub-item {
  display: block;
  padding: 6px 10px 6px 38px;
  font-size: 12px; font-weight: 500;
  color: var(--text-soft);
  text-decoration: none; cursor: pointer;
  border-radius: 6px;
  transition: all .2s;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sidebar-sub-item:hover { color: var(--text); background: var(--sidebar-hover); }
.sidebar-sub-item.active { color: var(--orange); background: var(--sidebar-active); font-weight: 600; }

.sidebar-footer {
  padding: 10px;
  border-top: 1px solid var(--sidebar-border);
  display: flex; justify-content: flex-end;
}
.sidebar-toggle {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer; color: var(--text-soft);
  transition: all .2s;
}
.sidebar-toggle:hover { background: var(--sidebar-hover); color: var(--text); }
.sidebar-toggle svg { transition: transform .3s var(--ease); }

body.collapsed-sidebar .sidebar {
  width: 28px;
  border-right-color: var(--sidebar-border);
  overflow: hidden;
  cursor: pointer;
}
body.collapsed-sidebar .sidebar::after {
  content: 'Hover to open';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(180deg);
  writing-mode: vertical-rl;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--text-soft);
  white-space: nowrap;
  pointer-events: none;
  opacity: 1;
  transition: opacity .2s;
}
body.collapsed-sidebar .sidebar:hover::after {
  opacity: 0;
}
body.collapsed-sidebar .sidebar:hover {
  width: var(--sidebar-w);
  box-shadow: 4px 0 24px rgba(0,0,0,.08);
  cursor: default;
}
body.collapsed-sidebar .sidebar .sidebar-header,
body.collapsed-sidebar .sidebar .sidebar-nav,
body.collapsed-sidebar .sidebar #sidebarUpgradeNudge,
body.collapsed-sidebar .sidebar .sidebar-footer {
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s;
}
body.collapsed-sidebar .sidebar:hover .sidebar-header,
body.collapsed-sidebar .sidebar:hover .sidebar-nav,
body.collapsed-sidebar .sidebar:hover #sidebarUpgradeNudge,
body.collapsed-sidebar .sidebar:hover .sidebar-footer {
  opacity: 1;
  pointer-events: auto;
}
body.collapsed-sidebar .main-area {
  margin-left: 28px;
}
body.collapsed-sidebar .sidebar-toggle svg {
  transform: rotate(180deg);
}

body.no-sidebar .sidebar {
  transform: translateX(-100%);
  pointer-events: none;
}
body.no-sidebar .main-area {
  margin-left: 0;
}
body.no-sidebar.collapsed-sidebar .main-area {
  margin-left: 0;
}

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 190;
}
.sidebar-overlay.active { display: block; }

.main-area {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  transition: margin-left .3s var(--ease);
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px;
  background: var(--topbar-bg);
  backdrop-filter: blur(14px) saturate(1.6);
  -webkit-backdrop-filter: blur(14px) saturate(1.6);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}
.topbar.pinned { border-bottom-color: var(--border-strong); box-shadow: 0 1px 12px rgba(0,0,0,.04); }
.topbar-hamburger {
  display: none;
  background: none; border: none;
  color: var(--text); cursor: pointer; padding: 4px;
}

.topbar-crumbs {
  display: flex; align-items: center; gap: 8px;
  flex: 1; min-width: 0; font-size: 14px;
}
.topbar-crumbs a {
  color: var(--text-soft); text-decoration: none;
  font-weight: 500; cursor: pointer; transition: color .2s; white-space: nowrap;
}
.topbar-crumbs a:hover { color: var(--orange); }
.topbar-crumbs .sep { color: var(--text-soft); opacity: .35; }
.topbar-crumbs .current {
  color: var(--text); font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0;
}

.topbar-right {
  display: flex; align-items: center; gap: 8px; flex-shrink: 0;
}

.search-box { position: relative; width: 220px; }
.search-box input {
  width: 100%; height: 36px;
  padding: 0 14px 0 34px;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  font-family: var(--font); font-size: 13px; color: var(--text);
  outline: none; transition: all .3s var(--ease);
}
.search-box input:focus { border-color: var(--violet); box-shadow: 0 0 0 3px rgba(124,92,252,.08); width: 280px; }
.search-box input::placeholder { color: var(--text-soft); }
.search-box-icon {
  position: absolute; left: 11px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-soft); pointer-events: none;
}
.search-box-kbd {
  position: absolute; right: 10px; top: 50%;
  transform: translateY(-50%);
  font-size: 10px; color: var(--text-soft);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 5px; padding: 1px 6px;
  font-family: var(--font); pointer-events: none; letter-spacing: .5px;
}
.search-results {
  display: none; position: absolute;
  top: calc(100% + 6px); left: 0; right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 60px rgba(0,0,0,.12);
  max-height: 400px; overflow-y: auto;
  z-index: 200; animation: slideUp .2s var(--ease);
}
.search-results.open { display: block; }
.search-hit { padding: 10px 14px; cursor: pointer; transition: background .15s; border-bottom: 1px solid var(--border); }
.search-hit:last-child { border-bottom: none; }
.search-hit:hover, .search-hit.hl { background: var(--violet-soft); }
.search-hit-title { font-size: 14px; font-weight: 600; color: var(--text); }
.search-hit-crumb { font-size: 11px; color: var(--text-soft); margin-top: 2px; }
.search-empty { padding: 20px; text-align: center; color: var(--text-soft); font-size: 13px; }

.settings-btn {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer; color: var(--text-mid);
  transition: all .25s var(--ease);
}
.settings-btn:hover {
  color: var(--orange); border-color: var(--orange); background: var(--orange-soft);
}

.settings-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 500;
  place-items: center;
  animation: fadeIn .2s ease;
}
.settings-overlay.open { display: grid; }
.settings-modal {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 28px;
  width: 640px; max-width: calc(100vw - 32px);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  box-shadow: 0 32px 80px rgba(0,0,0,.2);
  animation: rise .4s var(--ease);
}
.settings-header {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.settings-header h3 {
  font-family: var(--font-display);
  font-size: 24px; letter-spacing: -.5px;
}
.settings-close {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  background: none; border: 1px solid var(--border);
  border-radius: 10px; cursor: pointer;
  color: var(--text-soft); transition: all .2s;
}
.settings-close:hover { background: var(--sidebar-hover); color: var(--text); }
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 12px;
}
.settings-card {
  padding: 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all .25s var(--ease);
  text-align: center;
}
.settings-card:hover { border-color: var(--border-strong); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.06); }
.settings-card.active { border-color: var(--orange); background: var(--orange-soft); }
.settings-preview {
  width: 100%; height: 72px;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 10px;
}
.settings-preview.theme-swatch {
  border: 1px solid var(--border);
}
.swatch-bg {
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  padding: 10px 14px;
  gap: 6px;
  justify-content: center;
}
.swatch-accent {
  height: 6px; width: 40%;
  border-radius: 3px;
}
.swatch-lines {
  display: flex; flex-direction: column; gap: 4px;
}
.swatch-line {
  height: 4px; width: 80%;
  border-radius: 2px;
}
.swatch-line.short {
  width: 55%;
}
.settings-card-name { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.settings-card-desc { font-size: 11px; color: var(--text-soft); line-height: 1.4; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 28px; }

.marquee-bar {
  background: var(--bg-dark); color: var(--text-inv);
  overflow: hidden; white-space: nowrap;
  padding: 10px 0; font-size: 13px; font-weight: 500; letter-spacing: .5px;
}
[data-theme="dark"] .marquee-bar { background: #0a0a0a; }
[data-color-theme="ocean"] .marquee-bar { background: #060f1a; }
[data-color-theme="nord"] .marquee-bar { background: #242933; }
[data-color-theme="dracula"] .marquee-bar { background: #1e1f29; }
[data-color-theme="monokai"] .marquee-bar { background: #1d1e18; }
.marquee-track { display: inline-flex; animation: marquee 40s linear infinite; }
.marquee-item { padding: 0 32px; opacity: .7; }
.marquee-dot {
  display: inline-block; width: 4px; height: 4px;
  border-radius: 50%; background: var(--orange);
  margin-right: 10px; vertical-align: middle;
}

.hero-section { padding: 48px 0 36px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
.hero-left h1 {
  font-family: var(--font-display);
  font-size: clamp(34px,4.5vw,56px);
  line-height: 1.08; letter-spacing: -1.5px;
  color: var(--text); margin-bottom: 18px;
}
.hero-left h1 em { font-style: normal; color: var(--orange); }
.hero-left p { font-size: 16px; color: var(--text-mid); max-width: 400px; line-height: 1.7; margin-bottom: 24px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-tag {
  padding: 5px 13px; border-radius: 99px;
  font-size: 12px; font-weight: 600; letter-spacing: .3px;
  border: 1.5px solid; transition: transform .2s var(--ease); cursor: default;
}
.hero-tag:hover { transform: translateY(-2px); }
.hero-tag.t1 { background:var(--orange-soft); color:var(--orange); border-color:rgba(255,107,53,.2); }
.hero-tag.t2 { background:var(--violet-soft); color:var(--violet); border-color:rgba(124,92,252,.2); }
.hero-tag.t3 { background:var(--teal-soft); color:var(--teal); border-color:rgba(13,148,136,.2); }
.hero-tag.t4 { background:var(--rose-soft); color:var(--rose); border-color:rgba(225,29,72,.2); }
.hero-tag.t5 { background:var(--blue-soft); color:var(--blue); border-color:rgba(37,99,235,.2); }

.hero-right { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.hero-card {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 24px 20px;
  transition: all .35s var(--ease); position: relative; overflow: hidden;
}
.hero-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,.06); border-color: var(--border-strong); }
.hero-card-num { font-size: 36px; font-weight: 800; line-height: 1; margin-bottom: 4px; font-variant-numeric: tabular-nums; }
.hero-card-label { font-size: 12px; font-weight: 500; color: var(--text-soft); text-transform: uppercase; letter-spacing: 1px; }
.hero-card-icon { position: absolute; top: 14px; right: 14px; opacity: .8; font-size: 40px; }
.hero-card.c1 .hero-card-num { color:var(--orange); }
.hero-card.c2 .hero-card-num { color:var(--violet); }
.hero-card.c3 .hero-card-num { color:var(--teal); }
.hero-card.c4 .hero-card-num { color:var(--rose); }

.section-divider { display: flex; align-items: center; gap: 16px; margin: 40px 0 24px; }
.section-divider-line { flex: 1; height: 1.5px; background: var(--border-strong); }
.section-divider-text { font-family: var(--font-display); font-size: 26px; color: var(--text); white-space: nowrap; letter-spacing: -.5px; }
.section-divider-count {
  font-family: var(--font); font-size: 12px; font-weight: 600;
  color: var(--text-soft); background: var(--bg);
  border: 1px solid var(--border-strong); border-radius: 99px; padding: 3px 11px;
}

.bento { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-bottom: 48px; }
.bento-card {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 22px; cursor: pointer;
  display: flex; flex-direction: column; position: relative;
  overflow: hidden; transition: all .35s var(--ease);
}
.bento-card:hover { transform: translateY(-4px); box-shadow: 0 14px 44px rgba(0,0,0,.06); border-color: var(--border-strong); }
.bento-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.bento-emoji {
  width: 40px; height: 40px; border-radius: 10px;
  display: grid; place-items: center; font-size: 20px;
  transition: transform .3s var(--ease);
}
.bento-card:hover .bento-emoji { transform: scale(1.12) rotate(-5deg); }
.bento-count {
  font-size: 11px; font-weight: 600; color: var(--text-soft);
  background: var(--bg); border: 1px solid var(--border);
  padding: 2px 9px; border-radius: 99px;
}
.bento-title { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 5px; letter-spacing: -.2px; }
.bento-desc { font-size: 13px; color: var(--text-mid); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.bento-bar { height: 3px; border-radius: 3px; margin-top: 16px; opacity: 0; transform: scaleX(0); transform-origin: left; transition: all .4s var(--ease); }
.bento-card:hover .bento-bar { opacity: 1; transform: scaleX(1); }

/* ═══ Newly Added Topics Grid ═══ */
.new-topics-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-bottom: 40px;
}
.new-topic-group {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px;
  transition: transform .2s var(--ease), box-shadow .2s;
}
.new-topic-group:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}
.new-topic-heading {
  font-size: 13px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .5px; margin-bottom: 10px;
}
.new-topic-list {
  list-style: none; padding: 0; margin: 0;
}
.new-topic-list li {
  font-size: 13px; color: var(--text-soft); padding: 5px 0;
  cursor: pointer; transition: color .15s, padding-left .15s;
  border-bottom: 1px solid var(--border-light, rgba(0,0,0,.04));
}
.new-topic-list li:last-child { border-bottom: none; }
.new-topic-list li:hover {
  color: var(--accent); padding-left: 6px;
}
@media (max-width: 1024px) {
  .new-topics-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .new-topics-grid { grid-template-columns: 1fr; gap: 12px; }
}

.folder-banner {
  display: flex; align-items: center; gap: 20px;
  margin-bottom: 28px; padding: 28px;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--border); background: var(--bg-card);
}
.folder-banner-emoji { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; font-size: 28px; flex-shrink: 0; }
.folder-banner-info h2 { font-family: var(--font-display); font-size: 28px; letter-spacing: -.5px; }
.folder-banner-info span { font-size: 13px; color: var(--text-soft); }

.file-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 48px; }
.file-row {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 18px; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1.5px solid var(--border);
  cursor: pointer; transition: all .3s var(--ease); position: relative;
}
.file-row:hover { border-color: var(--orange); box-shadow: 0 4px 20px rgba(255,107,53,.06); transform: translateX(4px); }
.file-row-num {
  font-size: 11px; font-weight: 700; color: var(--text-inv);
  background: var(--bg-dark); border-radius: 7px;
  width: 30px; height: 30px; display: grid; place-items: center;
  flex-shrink: 0; font-variant-numeric: tabular-nums;
}
[data-theme="dark"] .file-row-num { background: var(--orange); color: #fff; }
.file-row-title { font-size: 14px; font-weight: 600; color: var(--text); flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-row-arrow { color: var(--text-soft); transition: all .25s var(--ease); flex-shrink: 0; }
.file-row:hover .file-row-arrow { color: var(--orange); transform: translateX(4px); }

.reader { display: grid; grid-template-columns: 1fr 220px; gap: 24px; margin-bottom: 48px; align-items: start; }
.reader-nav {
  position: sticky; top: calc(var(--topbar-h) + 60px);
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 16px;
  max-height: calc(100vh - var(--topbar-h) - 32px);
  overflow-y: auto; overflow-x: hidden;
}
.toc-label { font-size: 10px; font-weight: 700; color: var(--text-soft); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 12px; }
.toc-progress { position: absolute; right: 0; top: 46px; bottom: 16px; width: 3px; background: var(--border); border-radius: 3px; overflow: hidden; }
.toc-progress-bar { width: 100%; height: 0%; background: var(--orange); border-radius: 3px; transition: height .15s ease-out; }
.toc-list { list-style: none; margin: 0; padding: 0 0 0 10px; }
.toc-list li { margin: 0; }
.toc-link {
  display: block; padding: 4px 8px; border-radius: 5px;
  font-size: 12px; font-weight: 500; color: var(--text-mid);
  text-decoration: none; cursor: pointer;
  transition: all .2s var(--ease);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  border-left: 2px solid transparent;
  margin-left: -10px; padding-left: 18px;
}
.toc-link:hover { color: var(--text); background: var(--sidebar-hover); }
.toc-link.active { color: var(--orange); font-weight: 600; background: var(--sidebar-active); border-left-color: var(--orange); }
.toc-h1 { font-weight: 700; font-size: 13px; }
.toc-h2 { padding-left: 24px; }
.toc-h3 { padding-left: 34px; font-size: 11px; color: var(--text-soft); }
.toc-empty { font-size: 12px; color: var(--text-soft); padding: 8px 0; }

/* Study Panel (Key Concepts + Related Topics sidebar) */
.sp-section { margin-bottom: 16px; }
.sp-label { font-size: 10px; font-weight: 700; color: var(--text-soft); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 8px; }
.sp-sub-label { font-size: 10px; font-weight: 600; color: var(--text-soft); margin: 8px 0 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.sp-empty { font-size: 11px; color: var(--text-soft); padding: 4px 0; font-style: italic; }
.sp-concept-list { list-style: none; margin: 0; padding: 0; }
.sp-concept-item { padding: 5px 0; border-bottom: 1px solid var(--border); }
.sp-concept-item:last-child { border-bottom: none; }
.sp-concept-term { display: block; font-size: 12px; font-weight: 600; color: var(--text); line-height: 1.4; }
.sp-concept-desc { display: block; font-size: 11px; color: var(--text-soft); line-height: 1.5; margin-top: 1px; }
.sp-related-list { list-style: none; margin: 0; padding: 0; }
.sp-related-list li { margin: 0; }
.sp-related-link {
  display: block; padding: 4px 6px; border-radius: 5px;
  font-size: 12px; font-weight: 500; color: var(--text-mid);
  text-decoration: none; cursor: pointer; transition: all .2s var(--ease);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sp-related-link:hover { color: var(--orange); background: var(--sidebar-hover); }
.sp-related-emoji { font-size: 11px; margin-right: 2px; }
.sp-prereq-list { list-style: none; margin: 0; padding: 0; }
.sp-prereq-item { font-size: 11px; color: var(--text-mid); padding: 3px 0 3px 14px; position: relative; line-height: 1.5; }
.sp-prereq-item::before { content: '\2022'; position: absolute; left: 2px; color: var(--orange); font-weight: 700; }
.sp-shortcuts { font-size: 10px; color: var(--text-soft); line-height: 1.8; padding-top: 8px; border-top: 1px solid var(--border); }

.reader-body {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 40px 44px; min-width: 0;
  word-wrap: break-word; overflow-wrap: break-word;
}
.reader-body h1 { font-family: var(--font-display); font-size: 32px; color: var(--text); margin-bottom: 22px; line-height: 1.2; padding-bottom: 18px; border-bottom: 2px solid var(--border); letter-spacing: -.5px; }
.reader-body h2 { font-family: var(--font-display); font-size: 23px; color: var(--text); margin: 36px 0 14px; padding-bottom: 10px; border-bottom: 1.5px solid var(--border); }
.reader-body h3 { font-size: 18px; font-weight: 700; color: var(--text); margin: 26px 0 10px; }
.reader-body h4, .reader-body h5, .reader-body h6 { font-size: 15px; font-weight: 700; color: var(--text-mid); margin: 22px 0 10px; }
.reader-body p { margin-bottom: 14px; color: var(--text-mid); line-height: 1.85; font-size: 15px; }
.reader-body a { color: var(--orange); text-decoration: none; font-weight: 500; border-bottom: 1px dashed rgba(255,107,53,.3); transition: border-color .2s; }
.reader-body a:hover { border-bottom-style: solid; border-color: var(--orange); }
.reader-body ul, .reader-body ol { margin: 0 0 14px 20px; color: var(--text-mid); font-size: 15px; }
.reader-body li { margin-bottom: 6px; line-height: 1.75; }
.reader-body strong { color: var(--text); font-weight: 600; }
.reader-body code { background: var(--violet-soft); color: var(--violet); padding: 2px 7px; border-radius: 6px; font-family: var(--font-mono); font-size: .87em; }
.reader-body pre { background: #1a1a1a; border-radius: var(--radius-sm); padding: 22px; margin: 18px 0; overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1.5px solid var(--border); max-width: 100%; }
.reader-body pre code { background: transparent; color: #e8e8e8; padding: 0; font-size: 13px; line-height: 1.7; }
.reader-body blockquote { border-left: 4px solid var(--orange); background: var(--orange-soft); padding: 14px 22px; margin: 18px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 15px; color: var(--text-mid); }
.reader-body blockquote p { margin-bottom: 0; }
.reader-body .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 18px 0; max-width: 100%; }
.reader-body table { width: 100%; border-collapse: collapse; font-size: 14px; }
.reader-body th { background: var(--bg); font-weight: 600; color: var(--text); text-align: left; padding: 10px 14px; border: 1px solid var(--border-strong); }
.reader-body td { padding: 10px 14px; border: 1px solid var(--border-strong); color: var(--text-mid); }
.reader-body tr:nth-child(even) td { background: var(--bg); }
.reader-body img { max-width: 100%; border-radius: var(--radius-sm); margin: 18px 0; }
.reader-body hr { border: none; border-top: 1.5px solid var(--border); margin: 26px 0; }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-soft); }

.page-footer {
  background: var(--bg-dark); color: rgba(255,255,255,.5);
  text-align: center; padding: 32px 24px; font-size: 13px; margin-top: auto;
}
[data-theme="dark"] .page-footer { background: #0a0a0a; }
[data-color-theme="ocean"] .page-footer { background: #060f1a; }
[data-color-theme="nord"] .page-footer { background: #242933; }
[data-color-theme="dracula"] .page-footer { background: #1e1f29; }
[data-color-theme="monokai"] .page-footer { background: #1d1e18; }
.page-footer strong { color: rgba(255,255,255,.8); font-weight: 600; }

.skeleton { background: linear-gradient(90deg,var(--border) 25%,var(--bg) 50%,var(--border) 75%); background-size: 400% 100%; animation: shimmer 2s infinite; border-radius: 8px; }

/* ── Pagination ──────────────────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 24px 0 8px;
  border-top: 1.5px solid var(--border);
  margin-top: 32px;
}
.page-btn {
  min-width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-mid);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s var(--ease);
  padding: 0 6px;
}
.page-btn:hover { border-color: var(--orange); color: var(--orange); background: var(--orange-soft); }
.page-btn.active { background: var(--bg-dark); color: var(--text-inv); border-color: var(--bg-dark); }
[data-theme="dark"] .page-btn.active { background: var(--orange); border-color: var(--orange); }
.page-btn:disabled { opacity: .35; cursor: not-allowed; pointer-events: none; }
.page-btn.locked {
  position: relative;
  color: var(--text-soft);
  opacity: .6;
}
.page-btn.locked::after {
  content: '';
  position: absolute;
  top: 2px; right: 2px;
  width: 12px; height: 12px;
  background: var(--rose);
  border-radius: 50%;
  border: 2px solid var(--bg-card);
}
.page-info {
  font-size: 13px; color: var(--text-soft); font-weight: 500;
  padding: 0 10px;
}
.page-nav-arrows {
  display: flex; gap: 6px;
}
.page-arrow {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-mid);
  cursor: pointer;
  transition: all .2s var(--ease);
}
.page-arrow:hover { border-color: var(--orange); color: var(--orange); }
.page-arrow:disabled { opacity: .3; cursor: not-allowed; }

/* ── Ad Slots ────────────────────────────────────────────────────────────── */
.ad-slot {
  background: var(--bg);
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin: 20px 0;
  text-align: center;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.ad-slot-banner { min-height: 90px; }
.ad-slot-inline { min-height: 250px; max-width: 100%; }
.ad-slot-sidebar { min-height: 250px; width: 100%; margin: 16px 0 0; }
.ad-slot-popup { min-height: 200px; width: 100%; }
/* Home page ads — full width between sections */
.ad-slot-home {
  min-height: 100px;
  max-width: 100%;
  width: 100%;
  margin: 28px 0;
  border-radius: var(--radius);
}
/* Bottom of topic page, above prev/next nav */
.ad-slot-bottom {
  min-height: 90px;
  max-width: 100%;
  margin: 32px 0 8px;
}
/* Folder page — banner below header */
.ad-slot-folder-banner {
  min-height: 90px;
  max-width: 100%;
  margin: 0 0 20px;
}
/* Folder page — inline between file rows */
.ad-slot-folder-inline {
  min-height: 90px;
  max-width: 100%;
  margin: 4px 0;
  border-radius: var(--radius-sm);
}
/* In-content ads — between H2 heading sections inside a topic */
.ad-slot-in-content {
  min-height: 120px;
  max-width: 100%;
  width: 100%;
  margin: 28px 0;
  clear: both;
}
.ad-placeholder-inner {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 8px; padding: 20px; width: 100%;
}
.ad-placeholder-label {
  font-size: 10px; font-weight: 700;
  color: var(--text-soft); text-transform: uppercase;
  letter-spacing: 1.5px;
}
.ad-placeholder-box {
  width: 100%; max-width: 320px; height: 60px;
  background: var(--border);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: var(--text-soft); font-weight: 500;
}

/* ── Content Blur Gate ───────────────────────────────────────────────────── */
.content-locked {
  position: relative;
  max-height: 300px;
  overflow: hidden;
}
.content-locked::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent, var(--bg-card) 90%);
  pointer-events: none;
}

/* ── Ad Gate Modal ───────────────────────────────────────────────────────── */
.adgate-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 600;
  place-items: center;
}
.adgate-overlay.open { display: grid; }
.adgate-modal {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  width: 420px;
  max-width: calc(100vw - 32px);
  text-align: center;
  box-shadow: 0 32px 80px rgba(0,0,0,.3);
  animation: rise .4s var(--ease);
}
.adgate-icon { font-size: 48px; margin-bottom: 12px; }
.adgate-title {
  font-family: var(--font-display);
  font-size: 24px;
  margin-bottom: 8px;
  color: var(--text);
}
.adgate-desc {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.6;
  margin-bottom: 20px;
}
.adgate-ad-slot {
  background: var(--bg);
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  overflow: hidden;
}
.adgate-btn {
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--bg-dark);
  color: var(--text-inv);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all .25s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.adgate-btn:disabled { opacity: .5; cursor: wait; }
.adgate-btn:not(:disabled):hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.15); }
[data-theme="dark"] .adgate-btn { background: var(--orange); }
.adgate-timer {
  width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.15);
  border-radius: 50%;
  font-size: 12px; font-weight: 700;
}
.adgate-btn:not(:disabled) .adgate-timer { display: none; }
.adgate-sub {
  font-size: 12px; color: var(--text-soft);
  margin-top: 12px;
}

/* ── Section indicator in pagination ─────────────────────────────────────── */
.page-section-name {
  font-size: 12px;
  color: var(--text-soft);
  text-align: center;
  margin-top: 8px;
  font-weight: 500;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Page sections ───────────────────────────────────────────────────────── */
.page-section {
  padding-bottom: 8px;
  margin-bottom: 8px;
}
.page-section + .page-section {
  border-top: 1.5px solid var(--border);
  padding-top: 28px;
}
.page-section + .ad-slot {
  margin-top: 12px;
}
.ad-slot + .page-section {
  margin-top: 12px;
}

/* ── Sticky Pagination Bar ───────────────────────────────────────────────── */
.pagination-sticky {
  position: sticky;
  top: var(--topbar-h);
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 10px 16px;
  margin: 0 0 16px;
  background: var(--topbar-bg);
  backdrop-filter: blur(14px) saturate(1.6);
  -webkit-backdrop-filter: blur(14px) saturate(1.6);
  border-bottom: 1px solid var(--border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  flex-wrap: wrap;
  transition: box-shadow .3s;
}
.pagination-sticky .page-btn {
  min-width: 32px; height: 32px;
  font-size: 12px;
  border-radius: 8px;
}
.pagination-sticky .page-info {
  font-size: 11px;
  margin-left: 8px;
}

/* ── Content protection ──────────────────────────────────────────────────── */
.reader-body {
  -webkit-user-select: none;
  user-select: none;
}
.reader-body pre code {
  -webkit-user-select: text;
  user-select: text;
}

.back-top {
  position: fixed; bottom: 24px; right: 24px;
  width: 42px; height: 42px;
  background: var(--bg-dark); color: var(--text-inv);
  border: none; border-radius: 12px; cursor: pointer;
  display: none; place-items: center;
  box-shadow: 0 4px 20px rgba(0,0,0,.15);
  transition: all .3s var(--ease); z-index: 50;
}
.back-top:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,.2); }
.back-top.show { display: grid; }

/* ── Tablet (1024px and below) ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px !important;
  }
  .sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,.12);
  }
  .main-area { margin-left: 0 !important; }
  .topbar-hamburger { display: block !important; }
  body.no-sidebar .topbar-hamburger { display: none !important; }
  .reader { grid-template-columns: 1fr; }
  .reader-nav {
    position: static;
    max-height: 240px;
    padding: 14px;
    order: -1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .toc-progress { display: none; }
  .toc-link { font-size: 12px; white-space: normal; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-right { margin-top: 16px; }
  .search-box { width: 180px !important; }
  .search-box input:focus { width: 100% !important; }
}

/* ── Mobile (768px and below) ────────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --topbar-h: 52px;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xl: 16px;
  }

  .bento { grid-template-columns: 1fr 1fr; gap: 10px; }
  .bento-card { padding: 16px; }
  .bento-emoji { width: 34px; height: 34px; font-size: 17px; }
  .bento-title { font-size: 14px; }
  .bento-desc { font-size: 12px; -webkit-line-clamp: 2; }
  .bento-count { font-size: 10px; padding: 2px 7px; }

  .hero-right { grid-template-columns: 1fr 1fr; gap: 10px; }
  .hero-card { padding: 18px 16px; }
  .hero-card-num { font-size: 28px; }
  .hero-card-label { font-size: 11px; }
  .hero-card-icon { font-size: 30px; }

  .hero-left h1 { font-size: clamp(28px, 7vw, 40px); margin-bottom: 12px; }
  .hero-left p { font-size: 14px; margin-bottom: 16px; }

  .hero-tags { gap: 6px; }
  .hero-tag { font-size: 11px; padding: 4px 10px; }

  .hero-section { padding: 32px 0 24px; }

  .wrap { padding: 0 16px; }
  .topbar { padding: 0 12px; gap: 10px; }
  .topbar-crumbs { font-size: 13px; }
  .topbar-crumbs .current { max-width: 140px; }

  .search-box { width: 140px !important; }
  .search-box input { height: 34px; font-size: 13px; padding-left: 30px; }
  .search-box-icon { left: 9px; }
  .search-box-kbd { display: none; }
  .search-results { left: auto; right: 0; width: calc(100vw - 32px); max-width: 360px; }

  .reader-body { padding: 20px 16px; }
  .reader-body h1 { font-size: 24px; margin-bottom: 16px; padding-bottom: 12px; }
  .reader-body h2 { font-size: 20px; margin: 24px 0 12px; }
  .reader-body h3 { font-size: 16px; margin: 20px 0 8px; }
  .reader-body p { font-size: 14px; line-height: 1.75; margin-bottom: 12px; }
  .reader-body ul, .reader-body ol { font-size: 14px; margin-left: 16px; }
  .reader-body pre { padding: 16px; margin: 12px 0; border-radius: 8px; }
  .reader-body pre code { font-size: 12px; }
  .reader-body code { font-size: 0.85em; padding: 2px 5px; }
  .reader-body blockquote { padding: 10px 14px; margin: 12px 0; font-size: 14px; }
  .reader-body table { font-size: 12px; display: block; overflow-x: auto; }
  .reader-body th, .reader-body td { padding: 8px 10px; white-space: nowrap; }

  .reader-nav { padding: 12px; border-radius: var(--radius); }
  .toc-label { font-size: 10px; margin-bottom: 10px; }
  .toc-link { font-size: 12px; padding: 5px 8px; }

  .marquee-bar { display: none; }

  .section-divider { margin: 28px 0 18px; gap: 12px; }
  .section-divider-text { font-size: 22px; }

  .folder-banner { padding: 18px; gap: 14px; flex-direction: row; border-radius: var(--radius); }
  .folder-banner-emoji { width: 48px; height: 48px; font-size: 24px; border-radius: 12px; }
  .folder-banner-info h2 { font-size: 20px; }
  .folder-banner-info span { font-size: 12px; }

  .file-row { padding: 12px 14px; gap: 10px; }
  .file-row-num { width: 28px; height: 28px; font-size: 10px; border-radius: 6px; }
  .file-row-title { font-size: 13px; }

  .settings-modal { padding: 20px; border-radius: var(--radius); }
  .settings-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
  .settings-card { padding: 10px; }
  .settings-preview { height: 56px; margin-bottom: 8px; }
  .settings-card-name { font-size: 12px; }
  .settings-card-desc { font-size: 10px; }

  .page-footer { padding: 24px 16px; font-size: 12px; }
  .back-top { bottom: 16px; right: 16px; width: 38px; height: 38px; border-radius: 10px; }

  /* Sidebar mobile: full-width overlay */
  .sidebar {
    width: 85vw !important;
    max-width: 320px;
  }
  .sidebar-header { padding: 12px 16px; }
  .sidebar-brand { font-size: 18px; }
  .sidebar-logo { width: 28px; height: 28px; border-radius: 7px; }
  .sidebar-nav { padding: 10px 8px; }
  .sidebar-nav-item { padding: 8px 10px; gap: 10px; }
  .sidebar-item-icon { width: 24px; height: 24px; font-size: 14px; }
  .sidebar-item-text { font-size: 13px; }
  .sidebar-sub-item { font-size: 12px; padding: 7px 10px 7px 42px; }
  .sidebar-footer { padding: 8px; }

  .sidebar-overlay.active {
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
  }

  /* Pagination mobile */
  .pagination { gap: 4px; padding: 20px 0 8px; flex-wrap: wrap; }
  .page-btn { min-width: 34px; height: 34px; font-size: 13px; border-radius: 8px; }
  .page-arrow { width: 34px; height: 34px; }
  .page-info { font-size: 12px; padding: 0 6px; }
  .pagination-sticky { padding: 8px 12px; gap: 4px; }
  .pagination-sticky .page-btn { min-width: 28px; height: 28px; font-size: 11px; border-radius: 6px; }
  .pagination-sticky .page-info { font-size: 10px; margin-left: 4px; }

  /* Ad slots mobile */
  .ad-slot-inline { min-height: 200px; }
  .ad-slot-sidebar { min-height: 200px; }
  .ad-slot-home { min-height: 80px; margin: 16px 0; }
  .ad-slot-bottom { min-height: 80px; margin: 20px 0 6px; }
  .ad-slot-folder-banner { min-height: 80px; margin: 0 0 14px; }
  .ad-slot-folder-inline { min-height: 80px; }
  .ad-slot-in-content { min-height: 100px; margin: 20px 0; }

  /* Ad gate modal mobile */
  .adgate-modal { padding: 24px 20px; }
  .adgate-title { font-size: 20px; }
  .adgate-desc { font-size: 13px; }
  .adgate-ad-slot { min-height: 150px; }
  .adgate-btn { padding: 12px 20px; font-size: 14px; }
}

/* ── Small phone (520px and below) ───────────────────────────────────────── */
@media (max-width: 520px) {
  .bento { grid-template-columns: 1fr; gap: 8px; }
  .bento-card {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
  }
  .bento-card-top { margin-bottom: 0; }
  .bento-emoji { width: 36px; height: 36px; font-size: 18px; }
  .bento-count { display: none; }
  .bento-title { font-size: 14px; margin-bottom: 2px; }
  .bento-desc { font-size: 12px; -webkit-line-clamp: 1; }
  .bento-bar { display: none; }

  .hero-right { grid-template-columns: 1fr 1fr; gap: 8px; }
  .hero-card { padding: 14px 12px; }
  .hero-card-num { font-size: 24px; }
  .hero-card-label { font-size: 10px; letter-spacing: 0.5px; }
  .hero-card-icon { display: none; }

  .hero-left h1 { font-size: 26px; letter-spacing: -1px; }
  .hero-left p { font-size: 13px; line-height: 1.6; }
  .hero-tags { gap: 5px; }
  .hero-tag { font-size: 10px; padding: 3px 8px; }

  .search-box { width: 110px !important; }
  .search-box input { font-size: 12px; height: 32px; padding-left: 28px; }
  .search-results { width: calc(100vw - 24px); right: -12px; }

  .topbar-crumbs .current { max-width: 100px; font-size: 12px; }
  .topbar-crumbs a { font-size: 12px; }
  .topbar-crumbs .sep { font-size: 10px; }

  .file-row { padding: 10px 12px; }
  .file-row-title { font-size: 13px; }

  .folder-banner { padding: 14px; gap: 12px; }
  .folder-banner-emoji { width: 40px; height: 40px; font-size: 20px; }
  .folder-banner-info h2 { font-size: 18px; }

  .reader-body { padding: 16px 14px; }
  .reader-body h1 { font-size: 22px; }
  .reader-body h2 { font-size: 18px; }
  .reader-body h3 { font-size: 15px; }
  .reader-body p, .reader-body li { font-size: 13.5px; }
  .reader-body pre { padding: 14px; }
  .reader-body pre code { font-size: 11.5px; }

  .section-divider-text { font-size: 20px; }
  .section-divider-count { font-size: 11px; padding: 2px 9px; }

  .settings-modal { padding: 16px; }
  .settings-header h3 { font-size: 20px; }
  .settings-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }

  .wrap { padding: 0 12px; }
}

/* ── Touch-friendly improvements ─────────────────────────────────────────── */
@media (hover: none) and (pointer: coarse) {
  .bento-card:hover { transform: none; box-shadow: none; }
  .bento-card:active { transform: scale(0.98); }

  .hero-card:hover { transform: none; box-shadow: none; }

  .file-row:hover { transform: none; box-shadow: none; }
  .file-row:active { background: var(--sidebar-hover); }

  .sidebar-nav-item:active { background: var(--sidebar-hover); }
  .sidebar-sub-item:active { background: var(--sidebar-hover); }

  /* Larger touch targets */
  .sidebar-nav-item { min-height: 44px; }
  .sidebar-sub-item { min-height: 40px; display: flex; align-items: center; }
  .file-row { min-height: 48px; }
  .toc-link { min-height: 36px; display: flex; align-items: center; }
  .search-hit { min-height: 48px; display: flex; flex-direction: column; justify-content: center; }

  /* Prevent text selection on interactive elements */
  .bento-card, .file-row, .sidebar-nav-item, .sidebar-sub-item {
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
}

/* ── Enhanced Content Page: Tabbed Navigation ────────────────────────────── */
.section-tabs-bar {
  position: sticky;
  top: var(--topbar-h);
  z-index: 90;
  display: flex;
  align-items: stretch;
  gap: 0;
  padding: 0;
  margin: 0 0 16px;
  background: var(--topbar-bg);
  backdrop-filter: blur(14px) saturate(1.6);
  -webkit-backdrop-filter: blur(14px) saturate(1.6);
  border-bottom: 1.5px solid var(--border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  overflow: hidden;
}
.section-tabs-scroll {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  flex: 1;
  scroll-behavior: smooth;
}
.section-tabs-scroll::-webkit-scrollbar { display: none; }
.section-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--text-mid);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all .2s var(--ease);
  border-bottom: 2.5px solid transparent;
  position: relative;
  flex-shrink: 0;
}
.section-tab:hover { color: var(--text); background: var(--sidebar-hover); }
.section-tab.active {
  color: var(--orange);
  border-bottom-color: var(--orange);
  background: var(--orange-soft);
}
.section-tab .tab-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 6px;
  background: var(--border);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-soft);
  flex-shrink: 0;
  transition: all .2s var(--ease);
}
.section-tab.active .tab-num {
  background: var(--orange);
  color: #fff;
}
.section-tab.pg-done .tab-num {
  background: var(--teal);
  color: #fff;
}
.section-tab.pg-done .tab-num::after { content: none; }
.section-tab.locked {
  opacity: .5;
  cursor: not-allowed;
}
.section-tab.locked .tab-num {
  background: var(--rose-soft);
  color: var(--rose);
}
.section-tab.locked .tab-num::after {
  content: '\1F512';
  font-size: 8px;
  position: absolute;
  top: 6px;
  right: 10px;
}
.section-tabs-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
}
.section-tabs-meta .page-info {
  font-size: 11px;
  margin: 0;
  padding: 0;
}
.progress-badge, .pro-weekly-badge, .deep-preview-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}
.progress-badge {
  background: var(--teal-soft);
  color: var(--teal);
}
.pro-weekly-badge {
  background: var(--violet-soft);
  color: var(--violet);
}
.deep-preview-badge {
  background: var(--orange-soft);
  color: var(--orange);
}
.section-tabs-meta .progress-badge,
.section-tabs-meta .pro-weekly-badge,
.section-tabs-meta .deep-preview-badge {
  font-size: 10px;
  padding: 2px 6px;
}
.tabs-arrow-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 28px;
  flex-shrink: 0;
  border: none;
  background: var(--bg-card);
  color: var(--text-soft);
  cursor: pointer;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  transition: all .2s;
}
.tabs-arrow-btn:hover { color: var(--orange); background: var(--orange-soft); }
.tabs-arrow-btn.show { display: flex; }

/* View mode toggle */
.view-mode-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: var(--border);
  border-radius: 8px;
  flex-shrink: 0;
  margin-left: 4px;
}
.view-mode-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  transition: all .2s var(--ease);
}
.view-mode-btn:hover { color: var(--text); }
.view-mode-btn.active {
  background: var(--bg-card);
  color: var(--orange);
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}

/* Tab mode: show only active section */
.reader-body.tab-mode .page-section {
  display: none;
  padding-top: 0;
  border-top: none;
}
.reader-body.tab-mode .page-section.tab-visible {
  display: block;
  animation: fadeInSection .3s var(--ease);
}
.reader-body.tab-mode .page-section.tab-visible + .page-section { border-top: none; }
.reader-body.tab-mode .ad-slot.ad-slot-inline { display: none; }
.reader-body.tab-mode .topic-nav-bar { display: none; }

/* Tab mode navigation buttons at bottom of section */
.tab-nav-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 0;
  margin-top: 24px;
  border-top: 1.5px solid var(--border);
  gap: 12px;
}
.tab-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-mid);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s var(--ease);
}
.tab-nav-btn:hover { border-color: var(--orange); color: var(--orange); background: var(--orange-soft); }
.tab-nav-btn:disabled { opacity: .3; cursor: not-allowed; pointer-events: none; }
.tab-nav-btn svg { width: 14px; height: 14px; }
.tab-section-title {
  font-size: 12px;
  color: var(--text-soft);
  text-align: center;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@keyframes fadeInSection {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Code Block Enhancements ─────────────────────────────────────────────── */
.code-block-wrap {
  position: relative;
  margin: 18px 0;
}
.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #252525;
  border: 1.5px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  gap: 8px;
}
.code-block-header + pre {
  margin-top: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.code-lang-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--violet);
  background: var(--violet-soft);
  padding: 2px 8px;
  border-radius: 5px;
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.code-block-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}
.code-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 6px;
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.6);
  font-family: var(--font);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
}
.code-action-btn:hover { background: rgba(255,255,255,.12); color: #fff; }
.code-action-btn.copied { color: var(--teal); border-color: var(--teal); }
.code-action-btn svg { width: 13px; height: 13px; }

/* Collapsible code blocks */
.code-block-wrap.collapsed pre {
  max-height: 160px;
  overflow: hidden;
  position: relative;
}
.code-block-wrap.collapsed pre::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, #1a1a1a);
  pointer-events: none;
}
.code-expand-btn {
  display: block;
  width: 100%;
  padding: 8px;
  border: 1.5px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: #1e1e1e;
  color: var(--orange);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  text-align: center;
}
.code-expand-btn:hover { background: #252525; }
.code-block-wrap:not(.collapsed) .code-expand-btn { display: none; }

/* ── Enhanced TOC Sidebar ────────────────────────────────────────────────── */
.toc-section-progress {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  margin-bottom: 10px;
  background: var(--bg);
  border-radius: 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-mid);
}
.toc-progress-ring {
  width: 28px; height: 28px;
  flex-shrink: 0;
}
.toc-progress-ring circle {
  fill: none;
  stroke-width: 3;
}
.toc-progress-ring .ring-bg { stroke: var(--border-strong); }
.toc-progress-ring .ring-fill { stroke: var(--teal); transition: stroke-dashoffset .4s ease; transform: rotate(-90deg); transform-origin: center; }
.toc-progress-text { flex: 1; }
.toc-progress-pct { color: var(--teal); font-weight: 700; }

.toc-link.toc-done {
  color: var(--teal);
}
.toc-link.toc-done::before {
  content: '\2713';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-size: 9px;
  font-weight: 800;
  margin-right: 6px;
  flex-shrink: 0;
}

/* Keyboard shortcut hints */
.kbd-hint {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  background: var(--bg);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-soft);
  font-family: var(--font-mono);
  line-height: 1.4;
  margin-left: 6px;
}

/* ── Responsive adjustments for enhanced UI ──────────────────────────────── */
@media (max-width: 1024px) {
  .section-tabs-meta { display: none; }
  .section-tab { padding: 8px 12px; font-size: 11px; }
  .view-mode-toggle { display: none; }
}

@media (max-width: 768px) {
  .section-tab { padding: 8px 10px; font-size: 11px; }
  .section-tab .tab-num { width: 18px; height: 18px; font-size: 9px; }
  .code-block-header { padding: 6px 10px; }
  .code-lang-badge { font-size: 10px; padding: 2px 6px; }
  .code-action-btn { padding: 3px 8px; font-size: 10px; }
  .tab-nav-btn { padding: 8px 14px; font-size: 12px; }
}

@media (max-width: 480px) {
  .section-tab .tab-title-text { display: none; }
  .section-tab { padding: 8px; }
  .tab-nav-footer { flex-wrap: wrap; }
  .tab-section-title { display: none; }
}

/* ── Safe area for notched devices ───────────────────────────────────────── */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .page-footer {
    padding-bottom: calc(24px + env(safe-area-inset-bottom));
  }
  .back-top {
    bottom: calc(16px + env(safe-area-inset-bottom));
  }
  .sidebar {
    padding-bottom: env(safe-area-inset-bottom);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   VAULT — Personal Document Vault
   ═══════════════════════════════════════════════════════════════════════════ */

.vault-loading { display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;gap:16px;color:var(--text-soft); }
.vault-loading .spinner { width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--orange);border-radius:50%;animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }
.vault-error { text-align:center;padding:60px 20px;color:var(--text-soft); }
.vault-error p { margin-bottom:16px; }

.vault-container { max-width:900px;margin:0 auto;padding:32px 20px; }
.vault-header { display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:24px;flex-wrap:wrap;gap:16px; }
.vault-header-left { flex:1; }
.vault-header-right { display:flex;gap:8px;align-items:center; }
.vault-title { font-size:24px;font-weight:700;display:flex;align-items:center;gap:10px;color:var(--text); }
.vault-subtitle { font-size:14px;color:var(--text-soft);margin-top:4px; }

.vault-btn { display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--border-strong);border-radius:8px;background:var(--bg-card);color:var(--text);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s; }
.vault-btn:hover { background:var(--bg-warm);border-color:var(--text-soft); }
.vault-btn-primary { background:var(--orange);color:#fff;border-color:var(--orange); }
.vault-btn-primary:hover { background:#e85a28;border-color:#e85a28; }

.vault-icon-btn { width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:6px;background:transparent;cursor:pointer;color:var(--text-soft);transition:all .15s; }
.vault-icon-btn:hover { background:var(--bg-warm);color:var(--text); }
.vault-icon-btn-danger:hover { background:var(--rose-soft);color:var(--rose); }

/* Storage bar */
.vault-storage-bar { background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:14px 18px;margin-bottom:24px; }
.vault-storage-info { display:flex;justify-content:space-between;font-size:13px;color:var(--text-mid);margin-bottom:8px; }
.vault-storage-plan { font-weight:600;color:var(--orange); }
.vault-progress-track { height:6px;background:var(--bg-warm);border-radius:3px;overflow:hidden; }
.vault-progress-fill { height:100%;background:linear-gradient(90deg,var(--orange),var(--violet));border-radius:3px;transition:width .3s; }

/* Folders grid */
.vault-folders-grid { display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;margin-bottom:24px; }
.vault-folder-card { display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;cursor:pointer;transition:all .15s; }
.vault-folder-card:hover { border-color:var(--orange);box-shadow:0 2px 8px rgba(255,107,53,.08); }
.vault-folder-icon { color:var(--orange);flex-shrink:0; }
.vault-folder-info { flex:1;min-width:0; }
.vault-folder-name { display:block;font-weight:600;font-size:14px;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }
.vault-folder-count { display:block;font-size:12px;color:var(--text-soft);margin-top:2px; }
.vault-folder-actions { display:flex;gap:4px; }

/* Files list */
.vault-files-list { display:flex;flex-direction:column;gap:8px; }
.vault-file-row { display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;transition:all .15s; }
.vault-file-row:hover { border-color:var(--border-strong); }
.vault-file-icon { flex-shrink:0; }
.vault-file-info { flex:1;cursor:pointer;min-width:0; }
.vault-file-name { display:block;font-weight:500;font-size:14px;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }
.vault-file-meta { display:block;font-size:12px;color:var(--text-soft);margin-top:2px; }
.vault-file-actions { display:flex;gap:4px; }

/* Breadcrumb */
.vault-breadcrumb { font-size:14px;color:var(--text-soft); }
.vault-breadcrumb a { color:var(--orange);cursor:pointer;text-decoration:none; }
.vault-breadcrumb a:hover { text-decoration:underline; }
.vault-bc-sep { margin:0 6px;color:var(--text-soft); }

/* Preview */
.vault-preview-container { background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:16px; }
.vault-container-pdf { max-width:100%;padding:32px 12px; }
.vault-container-pdf .vault-preview-container { border:none;background:transparent;border-radius:0; }

/* PDF.js Canvas Viewer */
.vault-pdf-viewer { display:flex;flex-direction:column;height:calc(100vh - 180px);min-height:500px; }
.vault-pdf-toolbar { display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--bg-dark);border-radius:10px 10px 0 0;flex-shrink:0; }
.vault-pdf-tb-btn { width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.15);border-radius:6px;background:transparent;cursor:pointer;color:rgba(255,255,255,.7);transition:all .15s; }
.vault-pdf-tb-btn:hover { background:rgba(255,255,255,.1);color:#fff; }
.vault-pdf-zoom-label { font-size:13px;font-weight:600;color:rgba(255,255,255,.8);min-width:44px;text-align:center;font-family:var(--font-mono); }
.vault-pdf-page-info { margin-left:auto;font-size:12px;color:rgba(255,255,255,.5); }
.vault-pdf-pages { flex:1;overflow-y:auto;overflow-x:auto;background:#525659;display:flex;flex-direction:column;align-items:center;gap:12px;padding:20px 16px;border-radius:0 0 10px 10px;-webkit-overflow-scrolling:touch; }
.vault-pdf-page { position:relative;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.3);border-radius:2px;line-height:0; }
.vault-pdf-page canvas { display:block;border-radius:2px; }
.vault-pdf-page-label { position:absolute;bottom:-22px;left:50%;transform:translateX(-50%);font-size:11px;color:rgba(255,255,255,.4);white-space:nowrap; }

.vault-pdf-frame { width:100%;height:calc(100vh - 220px);min-height:500px;border:none; }
.vault-md-viewer { padding:40px 44px;word-wrap:break-word;overflow-wrap:break-word; }
.vault-md-viewer h1 { font-family:var(--font-display);font-size:32px;color:var(--text);margin-bottom:22px;line-height:1.2;padding-bottom:18px;border-bottom:2px solid var(--border);letter-spacing:-.5px;font-weight:800; }
.vault-md-viewer h2 { font-family:var(--font-display);font-size:23px;color:var(--text);margin:36px 0 14px;padding-bottom:10px;border-bottom:1.5px solid var(--border);font-weight:700; }
.vault-md-viewer h3 { font-size:18px;font-weight:700;color:var(--text);margin:26px 0 10px; }
.vault-md-viewer h4,.vault-md-viewer h5,.vault-md-viewer h6 { font-size:15px;font-weight:700;color:var(--text-mid);margin:22px 0 10px; }
.vault-md-viewer p { margin-bottom:14px;color:var(--text-mid);line-height:1.85;font-size:15px; }
.vault-md-viewer a { color:var(--orange);text-decoration:none;font-weight:500;border-bottom:1px dashed rgba(255,107,53,.3);transition:border-color .2s; }
.vault-md-viewer a:hover { border-bottom-style:solid;border-color:var(--orange); }
.vault-md-viewer ul,.vault-md-viewer ol { margin:0 0 14px 20px;color:var(--text-mid);font-size:15px; }
.vault-md-viewer li { margin-bottom:6px;line-height:1.75; }
.vault-md-viewer strong { color:var(--text);font-weight:600; }
.vault-md-viewer code { background:var(--violet-soft);color:var(--violet);padding:2px 7px;border-radius:6px;font-family:var(--font-mono);font-size:.87em; }
.vault-md-viewer pre { background:#1a1a1a;border-radius:var(--radius-sm);padding:22px;margin:18px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1.5px solid var(--border);max-width:100%; }
.vault-md-viewer pre code { background:transparent;color:#e8e8e8;padding:0;font-size:13px;line-height:1.7; }
.vault-md-viewer blockquote { border-left:4px solid var(--orange);background:var(--orange-soft);padding:14px 22px;margin:18px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:15px;color:var(--text-mid); }
.vault-md-viewer blockquote p { margin-bottom:0; }
.vault-md-viewer .table-wrap { overflow-x:auto;-webkit-overflow-scrolling:touch;margin:18px 0;max-width:100%; }
.vault-md-viewer table { width:100%;border-collapse:collapse;font-size:14px; }
.vault-md-viewer th { background:var(--bg);font-weight:600;color:var(--text);text-align:left;padding:10px 14px;border:1px solid var(--border-strong); }
.vault-md-viewer td { padding:10px 14px;border:1px solid var(--border-strong);color:var(--text-mid); }
.vault-md-viewer tr:nth-child(even) td { background:var(--bg); }
.vault-md-viewer img { max-width:100%;border-radius:var(--radius-sm);margin:18px 0; }
.vault-md-viewer hr { border:none;border-top:1.5px solid var(--border);margin:26px 0; }

/* Drag & Drop Zone */
.vault-dropzone { border:2px dashed var(--border-strong);border-radius:12px;padding:32px 20px;text-align:center;margin-bottom:20px;transition:all .2s;cursor:pointer;background:var(--bg); }
.vault-dropzone:hover { border-color:var(--orange);background:var(--orange-soft); }
.vault-dropzone-active { border-color:var(--orange);background:var(--orange-soft);box-shadow:0 0 0 4px rgba(255,107,53,.12);transform:scale(1.01); }
.vault-dropzone-content { pointer-events:none; }
.vault-dropzone-content svg { color:var(--text-soft);margin-bottom:12px; }
.vault-dropzone-active .vault-dropzone-content svg { color:var(--orange); }
.vault-dropzone-text { font-size:15px;font-weight:600;color:var(--text);margin-bottom:4px; }
.vault-dropzone-sub { font-size:13px;color:var(--text-soft); }
.vault-dropzone-sub a { color:var(--orange);cursor:pointer;font-weight:500;pointer-events:auto; }
.vault-dropzone-sub a:hover { text-decoration:underline; }

/* Upload Progress */
.vault-upload-progress { display:flex;flex-direction:column;gap:6px;margin-bottom:20px; }
.vault-upload-item { display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;font-size:13px;transition:all .3s; }
.vault-upload-item-done { border-color:var(--teal);background:var(--teal-soft); }
.vault-upload-item-fail { border-color:var(--rose);background:var(--rose-soft); }
.vault-upload-item-info { display:flex;align-items:center;gap:8px;min-width:0;flex:1; }
.vault-upload-item-name { font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }
.vault-upload-item-size { color:var(--text-soft);flex-shrink:0;font-size:12px; }
.vault-upload-item-status { flex-shrink:0;margin-left:12px; }
.vault-upload-pending { color:var(--text-soft); }
.vault-upload-active { color:var(--orange);display:flex;align-items:center;gap:6px;font-weight:500; }
.vault-upload-spinner { width:14px;height:14px;border:2px solid var(--border);border-top-color:var(--orange);border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0; }
.vault-upload-done { color:var(--teal);font-weight:600; }
.vault-upload-fail { color:var(--rose);font-size:12px; }
.vault-upload-rejected { text-align:center;padding:8px;font-size:12px;color:var(--text-soft);background:var(--bg);border-radius:6px;margin-top:4px; }

/* DRM notice */
.vault-drm-notice,.vault-security-note { display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--teal-soft);border:1px solid var(--teal);border-radius:8px;font-size:12px;color:var(--teal);margin-top:12px; }
.vault-security-note { margin-top:24px; }

/* Empty state */
.vault-empty { text-align:center;padding:40px 20px;color:var(--text-soft);font-size:14px; }

/* Share modal */
.vault-modal-overlay { position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:10000;display:flex;align-items:center;justify-content:center;padding:20px; }
.vault-modal { background:var(--bg-card);border-radius:12px;width:100%;max-width:480px;max-height:80vh;overflow-y:auto; }
.vault-modal-header { display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border); }
.vault-modal-header h3 { font-size:16px;font-weight:600;color:var(--text); }
.vault-modal-close { width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:none;background:transparent;font-size:20px;cursor:pointer;color:var(--text-soft);border-radius:6px; }
.vault-modal-close:hover { background:var(--bg-warm); }
.vault-modal-body { padding:20px; }
.vault-share-form label { display:block;font-size:13px;font-weight:500;color:var(--text-mid);margin:12px 0 6px; }
.vault-share-form label:first-child { margin-top:0; }
.vault-share-form input { width:100%;padding:10px 12px;border:1px solid var(--border-strong);border-radius:8px;font-size:14px;background:var(--bg);color:var(--text); }
.vault-share-form input:focus { outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,107,53,.1); }
.vault-share-actions { margin-top:16px; }
.vault-share-result { margin-top:16px; }
.vault-share-error { color:var(--rose);font-size:13px; }
.vault-share-success { background:var(--teal-soft);padding:12px;border-radius:8px; }
.vault-share-success p { font-weight:600;color:var(--teal);margin-bottom:8px;font-size:14px; }
.vault-share-url { font-size:12px!important;background:var(--bg-card)!important;cursor:pointer; }
.vault-share-success small { display:block;margin-top:8px;color:var(--text-soft);font-size:12px; }

.vault-share-existing { margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--border); }
.vault-share-existing h4 { font-size:13px;font-weight:600;margin-bottom:8px;color:var(--text-mid); }
.vault-share-item { display:flex;align-items:center;gap:8px;padding:8px;background:var(--bg);border-radius:6px;font-size:12px;margin-bottom:6px; }
.vault-share-token { font-family:'Fira Code',monospace;color:var(--text-mid); }
.vault-share-expiry { flex:1;color:var(--text-soft); }

/* Shared file view */
.vault-share-view { display:flex;align-items:center;justify-content:center;min-height:60vh; }
.vault-share-auth { text-align:center;max-width:400px; }
.vault-share-lock { margin-bottom:16px; }
.vault-share-auth h2 { font-size:20px;font-weight:700;margin-bottom:8px;color:var(--text); }
.vault-share-auth p { font-size:14px;color:var(--text-soft);margin-bottom:20px; }
.vault-share-pw-input { width:100%;padding:12px;border:1px solid var(--border-strong);border-radius:8px;font-size:15px;text-align:center;margin-bottom:12px; }
.vault-share-pw-input:focus { outline:none;border-color:var(--orange); }
.vault-share-badge { display:inline-block;padding:4px 10px;background:var(--violet-soft);color:var(--violet);border-radius:20px;font-size:12px;font-weight:600;margin-left:12px; }

/* DRM: prevent copy/select in preview */
.vault-preview-container,.vault-md-viewer,.vault-pdf-viewer {
  -webkit-user-select:none;user-select:none;
  -webkit-touch-callout:none;
}

@media (max-width:600px) {
  .vault-container { padding:20px 12px; }
  .vault-folders-grid { grid-template-columns:1fr; }
  .vault-header { flex-direction:column; }
  .vault-pdf-frame { height:calc(100vh - 260px);min-height:400px; }
  .vault-md-viewer { padding:20px 16px; }
  .vault-md-viewer h1 { font-size:24px;margin-bottom:16px;padding-bottom:12px; }
  .vault-md-viewer h2 { font-size:20px;margin:24px 0 12px; }
  .vault-md-viewer h3 { font-size:16px;margin:20px 0 8px; }
  .vault-md-viewer p { font-size:14px;line-height:1.75;margin-bottom:12px; }
  .vault-md-viewer ul,.vault-md-viewer ol { font-size:14px;margin-left:16px; }
  .vault-md-viewer pre { padding:16px;margin:12px 0;border-radius:8px; }
  .vault-md-viewer pre code { font-size:12px; }
  .vault-md-viewer code { font-size:.85em;padding:2px 5px; }
  .vault-md-viewer blockquote { padding:10px 14px;margin:12px 0;font-size:14px; }
  .vault-md-viewer table { font-size:12px; }
  .vault-md-viewer th,.vault-md-viewer td { padding:8px 10px; }
}