/* NewbieNeuro — Video atlas dấu hiệu thần kinh. Token dùng chung với trang chủ và bộ công cụ. */
:root {
  --bg: #E7EAE7; --panel: #F1F3F0; --sunk: #DBE0DC; --rowHover: #EFF2EF;
  --ink: #12191A; --ink2: #3C4745; --meta: #5B6764;
  --hair: #BFC7C1; --strong: #12191A; --dash: #8E9A94;
  --core: #A8114F; --coreH: #78093A; --coreOn: #FFFFFF; --coreBg: #F3DCE6;
  --pen: #1B6655; --penOn: #FFFFFF; --penBg: #D3E6DE;
  --amber: #8A5A00; --amberBg: #F3E5C4;
  --inv: #12191A; --invInk: #E7EAE7; --invInk2: #C3CCC8; --invMeta: #9DA9A4; --invHair: #3A4548; --invCore: #FF7FAE; --invPen: #6ED3B4;
  --room: #0C1214; --roomCard: #151D20; --roomHair: #2E3A3D; --roomInk: #F1F3F0; --roomInk2: #DCE3DF; --roomMeta: #7E8A86;
  --shadow: rgba(12, 18, 20, 0.16);
  --display: 'Archivo', 'Be Vietnam Pro', system-ui, sans-serif;
  --body: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Consolas, monospace;
  color-scheme: light;
}
[data-theme="dark"] {
  --bg: #12191B; --panel: #1B2326; --sunk: #283236; --rowHover: #222B2F;
  --ink: #E3E9E5; --ink2: #B2BDB8; --meta: #8B9793;
  --hair: #2F3A3D; --strong: #5A686D; --dash: #4A585C;
  --core: #FF74A8; --coreH: #FFA3C6; --coreOn: #24050F; --coreBg: #3A1024;
  --pen: #63CCAB; --penOn: #05261D; --penBg: #16352C;
  --amber: #EFC478; --amberBg: #3A2A13;
  --inv: #28343A; --invInk: #EDF2EF; --invInk2: #C0CBC6; --invMeta: #94A09B; --invHair: #435256; --invCore: #FF8FBB; --invPen: #7FDCBE;
  --room: #080C0E; --roomCard: #121A1D; --roomHair: #283235; --roomInk: #EDF2EF; --roomInk2: #D5DEDA; --roomMeta: #79847F;
  --shadow: rgba(0, 0, 0, 0.55);
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--body); font-size: 15.5px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--core); text-decoration: none; }
a:hover { color: var(--coreH); text-decoration: underline; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--core); outline-offset: 3px; }
.mono { font-family: var(--mono); }
[hidden] { display: none !important; }
.top-rule { height: 4px; background: var(--core); }
.wrap { max-width: 1320px; margin: 0 auto; padding: 0 24px; }

.site-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--hair); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 14px; padding-bottom: 14px; width: 100%; }
.wordmark { display: flex; align-items: baseline; gap: 12px; color: var(--ink); font-family: var(--display); font-variation-settings: 'wdth' 118, 'wght' 750; font-size: 21px; letter-spacing: -0.015em; }
.wordmark:hover { color: var(--ink); text-decoration: none; }
.wm-sub { font-family: var(--body); font-variation-settings: normal; font-weight: 500; font-size: 13.5px; letter-spacing: 0; color: var(--meta); }
.theme-switch { display: flex; border: 1px solid var(--hair); border-radius: 2px; overflow: hidden; flex-shrink: 0; }
.theme-btn { min-height: 44px; padding: 0 13px; display: flex; align-items: center; gap: 7px; font-size: 13.5px; font-weight: 500; border: 0; background: transparent; color: var(--ink); }
.theme-btn + .theme-btn { border-left: 1px solid var(--hair); }
.theme-btn[aria-pressed="true"] { background: var(--inv); color: var(--invInk); }
.theme-btn:not([aria-pressed="true"]):hover { background: var(--sunk); }

.hero { padding: 48px 0 8px; }
h1 { margin: 0 0 14px; font-family: var(--display); font-variation-settings: 'wdth' 112, 'wght' 730; font-size: clamp(30px, 5vw, 52px); line-height: 1.04; letter-spacing: -0.026em; }
.lead { margin: 0; font-size: 16.5px; line-height: 1.6; color: var(--ink2); max-width: 680px; }
.stats { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 26px; }
.stat b { display: block; font-family: var(--mono); font-size: 26px; font-weight: 500; line-height: 1.2; }
.stat span { font-size: 13px; color: var(--meta); }
.howto { margin: 26px 0 0; padding-left: 14px; border-left: 3px solid var(--pen); font-size: 14px; color: var(--ink2); max-width: 680px; }
.howto b { color: var(--pen); }

.controls { position: sticky; top: 0; z-index: 20; background: var(--bg); border-bottom: 1px solid var(--hair); margin-top: 30px; }
.controls .wrap { padding-top: 14px; padding-bottom: 14px; }
.search-box { position: relative; max-width: 460px; }
.search-box svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--meta); pointer-events: none; }
.search-box input { width: 100%; height: 48px; padding: 0 14px 0 42px; background: var(--panel); border: 1.5px solid var(--strong); border-radius: 2px; }
.pills { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 12px; }
.pill { min-height: 44px; padding: 10px 13px; font-size: 13.5px; font-weight: 500; color: var(--ink); background: var(--panel); border: 1px solid var(--hair); border-radius: 2px; }
.pill:hover { border-color: var(--dash); }
.pill[aria-pressed="true"] { background: var(--inv); color: var(--invInk); border-color: var(--inv); }
.pill .n { font-family: var(--mono); font-size: 12px; opacity: .7; margin-left: 6px; }
.count { margin: 12px 0 0; font-family: var(--mono); font-size: 13px; color: var(--meta); }

.groups { padding: 8px 0 60px; }
.group-head { display: flex; align-items: baseline; gap: 14px; margin: 38px 0 4px; padding-top: 22px; border-top: 2px solid var(--strong); flex-wrap: wrap; }
.group-head h2 { margin: 0; font-family: var(--display); font-variation-settings: 'wdth' 112, 'wght' 700; font-size: clamp(20px, 2.4vw, 26px); letter-spacing: -0.02em; }
.group-head .en { font-size: 13.5px; color: var(--meta); font-style: italic; }
.group-meta { margin: 0 0 18px; font-size: 13px; color: var(--meta); display: flex; flex-wrap: wrap; gap: 6px 16px; }
.group-meta .mono { color: var(--core); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }
.card { background: var(--panel); border: 1px solid var(--hair); border-radius: 2px; overflow: hidden; display: flex; flex-direction: column; }
.frame { position: relative; aspect-ratio: 16 / 9; background: var(--room); border-bottom: 1px solid var(--hair); }
.frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.facade { position: absolute; inset: 0; width: 100%; height: 100%; padding: 0; border: 0; background: var(--room); display: block; cursor: pointer; }
.facade img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .78; }
.facade:hover img { opacity: .92; }
.facade .play { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 60px; height: 60px; border: 2px solid #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; background: rgba(12, 18, 20, .45); }
.facade:hover .play { background: var(--core); border-color: var(--core); }
.facade .dur { position: absolute; right: 8px; bottom: 8px; padding: 3px 7px; font-family: var(--mono); font-size: 11.5px; color: #fff; background: rgba(12, 18, 20, .75); border-radius: 2px; }
.card-body { padding: 15px 16px 14px; display: flex; flex-direction: column; flex: 1; }
.card-no { font-family: var(--mono); font-size: 12px; color: var(--core); }
.card-vi { display: block; font-size: 16px; font-weight: 600; line-height: 1.35; margin: 3px 0 2px; }
.card-en { display: block; font-size: 13px; font-style: italic; color: var(--meta); }
.card-desc { margin: 9px 0 0; font-size: 13.5px; line-height: 1.5; color: var(--ink2); }
.card-foot { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--hair); display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center; font-size: 12px; color: var(--meta); }
.card-foot .src { display: inline-flex; align-items: center; gap: 5px; }
.card-foot a { display: inline-flex; align-items: center; min-height: 36px; }
.tag { display: inline-block; padding: 3px 8px; font-size: 11.5px; font-weight: 600; border-radius: 2px; }
.tag-warn { color: var(--amber); background: var(--amberBg); }
.tag-mono { font-family: var(--mono); color: var(--core); background: var(--coreBg); }
.close-btn { position: absolute; right: 8px; top: 8px; z-index: 2; min-height: 36px; padding: 6px 11px; font-size: 12.5px; color: var(--roomInk); background: rgba(12, 18, 20, .8); border: 1px solid var(--roomHair); border-radius: 2px; }
.close-btn:hover { background: var(--core); border-color: var(--core); color: #fff; }


.empty { margin: 40px 0; padding: 20px; border: 1px dashed var(--dash); color: var(--meta); }
.site-foot { padding: 26px 0 60px; font-size: 13px; color: var(--meta); border-top: 1px solid var(--hair); }
.site-foot p { margin: 0 0 6px; max-width: 800px; }
.site-foot .disc { color: var(--ink2); }

@media (max-width: 640px) {
  .wrap { padding-left: 16px; padding-right: 16px; }
  .wm-sub { display: none; }
  .theme-btn span { display: none; }
  .hero { padding-top: 28px; }
  .cards { grid-template-columns: 1fr; }
  .controls { position: static; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }