/* ByteSized Dentistry brand: crimson #AC1F2D · navy #022135 · cream #EBDECE */
:root{
  --crimson:#ac1f2d;--navy:#022135;--cream:#ebdece;
  --bg:#f7f1e8;--panel:#fffdf9;--ink:#022135;--muted:#4f5f6c;--line:#e4d8c6;
  --accent:#ac1f2d;--accent-ink:#fff;--accent-soft:#f6e1df;--blue:#1f4f8a;--blue-soft:#e2ebf5;
  --good:#1f7a3f;--mid:#8a5a0e;--warn:#c0392b;--good-soft:#e2f2e7;--mid-soft:#f8ecd6;--warn-soft:#f8e1dd;
  --display:"Saira Condensed","Arial Narrow",system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#011824;--panel:#062a40;--ink:#ebdece;--muted:#a9b4bc;--line:#164058;
  --accent:#e2505c;--accent-ink:#011824;--accent-soft:#3a1a22;--blue:#8fb6ea;--blue-soft:#12324d;
  --good:#6cd18f;--mid:#e0a64a;--warn:#ff8a7a;--good-soft:#123a2a;--mid-soft:#3a2f1b;--warn-soft:#45222a;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
h1{font:800 22px/1.05 var(--display);margin:0;text-transform:uppercase;letter-spacing:.03em;color:var(--cream)}h1 span{font-weight:600;opacity:.75}
h2{font:700 14px/1.2 var(--display);text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin:0 0 10px}
h3{font:700 19px/1.2 var(--display);margin:0 0 6px;letter-spacing:.01em}
.m0{margin:0}
.sub{color:var(--muted);font-size:12.5px;margin:0}
.hint{color:var(--muted);font-size:13px;margin:8px 0 0}
button,.filebtn{font:inherit;cursor:pointer;border-radius:10px;padding:10px 14px;min-height:44px;font-weight:600;border:1px solid var(--line);background:var(--panel);color:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:6px}
button:disabled{opacity:.45;cursor:not-allowed}
.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.ghost{background:transparent}
.big{flex:1;min-height:52px;font-size:16px}
.danger-btn{background:transparent;color:var(--warn);border-color:var(--warn)}
.row{display:flex;gap:10px;align-items:flex-end}
.wrap-row{flex-wrap:wrap;align-items:center}
.between{justify-content:space-between}
.grow{flex:1;min-width:0}
.field{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted);margin-bottom:10px}
.field input,.field select{font:inherit;font-size:16px;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px;min-height:44px;width:100%}
.row .field{margin-bottom:0}

.top{background:var(--navy);border-bottom:4px solid var(--crimson);position:sticky;top:0;z-index:5;color:var(--cream)}
.top-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none}
.logo{width:44px;height:44px;border-radius:50%;flex:none}
.top .sub{color:var(--cream);opacity:.8;font:600 12px/1.2 var(--display);text-transform:uppercase;letter-spacing:.12em;margin-top:2px}
.tabs{display:flex;background:rgba(235,222,206,.08);border:1px solid rgba(235,222,206,.22);border-radius:999px;padding:3px;max-width:100%;overflow-x:auto;scrollbar-width:none}
.tabs button{border:0;background:none;border-radius:999px;padding:7px 18px;min-height:38px;color:var(--cream);white-space:nowrap;font:700 15px var(--display);text-transform:uppercase;letter-spacing:.06em}
.tabs button.on{background:var(--crimson);color:#fff}

main{padding-top:16px;padding-bottom:24px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:12px}
.grid{display:grid;grid-template-columns:1.1fr 1fr;gap:12px;align-items:start}
@media (max-width:820px){.grid{grid-template-columns:1fr}}

.stage{position:relative;aspect-ratio:4/3;background:#0b0d10;border-radius:12px;overflow:hidden}
.stage video{width:100%;height:100%;object-fit:cover;display:block}
.ring{position:absolute;left:50%;top:50%;width:36%;aspect-ratio:1;transform:translate(-50%,-50%);border:3px solid rgba(255,255,255,.85);border-radius:50%;box-shadow:0 0 0 2000px rgba(0,0,0,.28);pointer-events:none}
.ring::after{content:"";position:absolute;left:50%;top:50%;width:8px;height:8px;margin:-4px;border-radius:50%;background:#fff}
.stage-msg{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;text-align:center;padding:20px;color:#e9e7e2;background:#0b0d10}
.stage-msg span{color:#9aa1ab;font-size:13px;max-width:34ch}
.stage-msg button{margin-top:6px}
.overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(5,8,12,.62);color:#fff;text-align:center;padding:16px}
.overlay b{font-size:56px;line-height:1}
.overlay span{font-size:17px;margin-top:8px;max-width:26ch}
.live{margin-top:10px}
.live-row{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.lvl{flex:1;height:10px;border-radius:99px;background:var(--line);overflow:hidden}
.lvl i{display:block;height:100%;width:0;background:var(--blue);transition:width .15s}
.live-row b{min-width:3.5ch;text-align:right;color:var(--ink);font-variant-numeric:tabular-nums}
.badges{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.badge{font-size:12px;padding:4px 10px;border-radius:999px;background:var(--bg);border:1px solid var(--line);color:var(--muted)}
.badge[data-tone="good"]{background:var(--good-soft);color:var(--good);border-color:transparent}
.badge[data-tone="mid"]{background:var(--mid-soft);color:var(--mid);border-color:transparent}
.badge[data-tone="warn"]{background:var(--warn-soft);color:var(--warn);border-color:transparent}

.verdict{border-radius:12px;padding:14px;background:var(--bg);display:flex;flex-direction:column;gap:4px}
.verdict b{font-size:24px;line-height:1.2}
.verdict span{font-size:14px;color:var(--muted)}
.verdict[data-tone="good"]{background:var(--good-soft)}.verdict[data-tone="good"] b{color:var(--good)}
.verdict[data-tone="mid"]{background:var(--mid-soft)}.verdict[data-tone="mid"] b{color:var(--mid)}
.verdict[data-tone="warn"]{background:var(--warn-soft)}.verdict[data-tone="warn"] b{color:var(--warn)}
.verdict[data-tone="info"]{background:var(--blue-soft)}.verdict[data-tone="info"] b{color:var(--blue)}
.gauge{position:relative;display:flex;height:12px;border-radius:99px;overflow:visible;margin:16px 0 4px}
.zone{height:100%}.z1{flex:70;background:var(--warn);border-radius:99px 0 0 99px;opacity:.75}.z2{flex:15;background:var(--mid);opacity:.75}.z3{flex:35;background:var(--good);border-radius:0 99px 99px 0;opacity:.75}
.gauge u{position:absolute;top:-5px;bottom:-5px;width:4px;margin-left:-2px;border-radius:2px;background:var(--ink);left:0;display:none}
.gauge-l{display:flex;justify-content:space-between;font-size:11.5px;color:var(--muted)}
.gauge-l span:nth-child(1){flex:70}.gauge-l span:nth-child(2){flex:15}.gauge-l span:nth-child(3){flex:35;text-align:right}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:14px 0}
.stats div{background:var(--bg);border-radius:10px;padding:10px}
.stats span{display:block;font-size:12px;color:var(--muted)}
.stats b{font-size:19px;font-variant-numeric:tabular-nums}
.dose{border:1px dashed var(--line);border-radius:10px;padding:10px 12px;margin-bottom:12px}
.dose .hint{margin:0}
.checks{list-style:none;padding:0;margin:0 0 12px;font-size:13.5px}
.checks li{padding:6px 0;border-bottom:1px solid var(--line);display:flex;gap:8px}
.checks li:last-child{border-bottom:0}
.checks li::before{content:"✓";color:var(--good);font-weight:700}
.checks li.bad::before{content:"!";color:var(--warn)}
.checks li.so::before{content:"~";color:var(--mid)}
.steps article{padding:10px 0;border-bottom:1px solid var(--line)}
.steps article:last-child{border-bottom:0}
.steps p{margin:4px 0;color:var(--muted);font-size:14px}
.steps ol{margin:6px 0 0;padding-left:20px;font-size:14px}
.steps a{display:inline-flex;margin-top:8px;color:var(--accent);font-weight:600}

/* lights */
.light-card .head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;flex-wrap:wrap}
.light-card .meta{color:var(--muted);font-size:13px}
.pill{display:inline-block;font-size:12px;font-weight:650;padding:3px 10px;border-radius:999px}
.pill.good{background:var(--good-soft);color:var(--good)}.pill.mid{background:var(--mid-soft);color:var(--mid)}.pill.warn{background:var(--warn-soft);color:var(--warn)}.pill.none{background:var(--bg);color:var(--muted)}
.spark{width:100%;height:70px;margin:10px 0;display:block}
.tbl{width:100%;border-collapse:collapse;font-size:13px;font-variant-numeric:tabular-nums}
.tbl th,.tbl td{text-align:left;padding:7px 6px;border-bottom:1px solid var(--line)}
.tbl th{color:var(--muted);font-weight:600;font-size:12px}
.tbl-wrap{overflow-x:auto}
.tbl .x{border:0;background:none;color:var(--muted);min-height:32px;padding:4px 8px}
.empty{color:var(--muted);text-align:center;padding:28px 12px}

/* learn */
.learn{columns:2 360px;column-gap:12px}
.learn .card{break-inside:avoid}
.learn p,.learn li{font-size:14.5px}
.learn ul,.learn ol{padding-left:20px;margin:6px 0}
.refs li{font-size:13px;color:var(--muted);margin-bottom:4px}
.warn-card{border-color:var(--mid)}
.calc{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;align-items:end;margin-top:8px}
.calc .field{margin:0}
.calc-out{background:var(--accent-soft);border-radius:10px;padding:8px 10px;min-height:44px}
.calc-out span{display:block;font-size:12px;color:var(--muted)}
.calc-out b{font-size:17px}
@media (max-width:480px){.calc{grid-template-columns:1fr 1fr}.calc-out{grid-column:1/-1}}

dialog{border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--ink);padding:18px;width:min(460px,calc(100vw - 32px))}
dialog::backdrop{background:rgba(0,0,0,.45)}
.foot{color:var(--muted);font-size:12.5px;text-align:center;padding:8px 0 24px}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;z-index:20;max-width:calc(100vw - 32px)}

.print-only{display:none}
@media print{
  body{background:#fff;color:#000}
  .top,main,dialog,.toast{display:none!important}
  .print-only{display:block;font:12px/1.4 system-ui,sans-serif;padding:0}
  .print-only h1{font-size:18px}.print-only h2{font-size:14px;color:#000;margin:16px 0 6px;text-transform:none;letter-spacing:0}
  .print-only table{width:100%;border-collapse:collapse}
  .print-only th,.print-only td{border:1px solid #bbb;padding:4px 6px;text-align:left}
  .print-only section{break-inside:avoid}
}

/* brand display type on key numbers & actions */
.verdict b,.stats b,.calc-out b{font-family:var(--display);font-weight:800;letter-spacing:.01em}
.verdict b{font-size:30px;text-transform:uppercase}
.stats b{font-size:24px}
.big{font:700 17px var(--display);text-transform:uppercase;letter-spacing:.06em}
.card{box-shadow:0 1px 0 rgba(2,33,53,.04)}
.foot{border-top:1px solid var(--line);margin-top:8px;padding-top:16px}
.foot a{color:var(--accent);font-weight:600}
.foot .stamp{display:inline-flex;align-items:center;gap:8px;font:700 13px var(--display);text-transform:uppercase;letter-spacing:.1em;color:var(--ink);text-decoration:none;margin-bottom:6px}
.foot .stamp img{width:28px;height:28px;border-radius:50%}
@media (max-width:480px){h1{font-size:19px}.logo{width:38px;height:38px}.tabs{width:100%}.tabs button{flex:1;padding:7px 8px}}
[hidden]{display:none!important}
a{color:var(--accent)}
.tbl td,.tbl th{white-space:nowrap}