/* Doubling Time — styles (SPEC §6). Brand knobs: --accent (the ONE accent), fonts. Dark is default. */
@font-face{font-family:"Inter";src:url("../fonts/Inter-var.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url("../fonts/JetBrainsMono-var.woff2") format("woff2");font-weight:100 900;font-display:swap}
:root{
  --accent:#129662;               /* brand green (video template GREEN) */
  --font:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --bg:#0B0F1A;--surface:#131A2A;--surface-2:#1B2442;--border:rgba(255,255,255,.08);--border-2:rgba(255,255,255,.14);
  --text:#F2F4F8;--text-muted:#9AA3B5;--accent-text:#129662;--accent-soft:rgba(18,150,98,.16);--on-accent:#0B0F1A;--accent-btn:#129662;
  --negative:#E85642;--negative-soft:rgba(232,86,66,.16);--series-2:#2C6CCC;--mint:#AAE1C4;--warn:#E0A33A;
  --shadow:none;--radius:20px;--r-sm:12px;--maxw:1120px;--ease:cubic-bezier(.2,.8,.2,1);
  --grid:rgba(255,255,255,.03);color-scheme:dark light;
}
[data-theme="light"]{
  --bg:#FFFFFF;--surface:#F7F8FA;--surface-2:#EEF1F5;--border:rgba(27,36,66,.10);--border-2:rgba(27,36,66,.18);
  --text:#1B2442;--text-muted:#5B6478;--accent-text:#0F8053;--accent-soft:rgba(18,150,98,.10);--on-accent:#FFFFFF;--accent-btn:#0F8053;
  --negative:#BA4535;--negative-soft:rgba(232,86,66,.10);--warn:#9A6A12;--shadow:0 1px 2px rgba(16,24,40,.06);--grid:rgba(27,36,66,.04);
}
[data-theme="dark"] .accent-small{color:var(--mint)}
[hidden]{display:none!important}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:400 16px/1.6 var(--font);font-feature-settings:"cv11" 1;-webkit-font-smoothing:antialiased}
@media(min-width:1024px){body{font-size:17px}}
img,svg{display:block;max-width:100%}
a{color:var(--accent-text);text-underline-offset:3px}
a:hover{color:var(--text)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(28px,6vw,40px);font-weight:750}
h2{font-size:clamp(20px,3vw,24px);font-weight:700}
h3{font-size:18px;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
@media(min-width:640px){.wrap{padding:0 24px}}
.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent-btn);color:var(--on-accent);padding:8px 12px;border-radius:8px;z-index:100}.skip:focus{left:8px}
.muted{color:var(--text-muted)}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}

/* header */
.site-header{position:sticky;top:0;z-index:50;height:56px;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--border)}
.site-header .wrap{display:flex;align-items:center;height:56px;gap:8px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);white-space:nowrap}
.brand img{width:28px;height:28px;border-radius:22%}
.wordmark{font-weight:800;letter-spacing:-.01em;font-size:16px;text-transform:uppercase}
.wordmark b{color:var(--accent);font-weight:800}
.header-nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.header-nav a.navlink{color:var(--text-muted);text-decoration:none;font-weight:600;font-size:14px;padding:0 12px;min-height:44px;display:inline-flex;align-items:center;border-radius:10px}
.header-nav a.navlink:hover{color:var(--text);background:var(--surface)}
.icon-btn{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:12px;border:0;background:transparent;color:var(--text-muted);cursor:pointer;transition:background .2s,color .2s,transform .15s}
.icon-btn:hover{background:var(--surface);color:var(--text)}.icon-btn:active{transform:scale(.94)}
.icon-btn svg{width:20px;height:20px}
.theme-toggle .sun{display:none}[data-theme="light"] .theme-toggle .sun{display:block}[data-theme="light"] .theme-toggle .moon{display:none}

/* buttons & chips */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 20px;border-radius:var(--r-sm);border:1px solid var(--border-2);background:var(--surface);color:var(--text);font:600 15px/1 var(--font);text-decoration:none;cursor:pointer;transition:transform .15s var(--ease),border-color .2s,filter .2s}
.btn:hover{color:var(--text);border-color:var(--text-muted)}.btn:active{transform:scale(.97)}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--accent-btn);border-color:var(--accent-btn);color:var(--on-accent)}
.btn-primary:hover{color:var(--on-accent);border-color:var(--accent-btn);filter:brightness(1.08)}
.chip{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:0 14px;border-radius:999px;border:1px solid var(--border-2);background:transparent;color:var(--text-muted);font:600 13px/1 var(--font);cursor:pointer;white-space:nowrap;text-decoration:none;transition:all .2s var(--ease)}
.chip:hover{color:var(--text);border-color:var(--text-muted)}
.chip[aria-pressed="true"],.chip.on{background:var(--accent-soft);border-color:transparent;color:var(--accent-text)}
[data-theme="dark"] .chip[aria-pressed="true"]{color:var(--mint)}
[data-theme="light"] .chip[aria-pressed="true"],[data-theme="light"] .chip.on{color:#0F8053;background:#FFFFFF;border-color:#0F8053}
.xs-chip{min-height:30px;padding:0 10px;font-size:12px}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--surface-2);color:var(--text-muted)}
.linkish{background:none;border:0;padding:8px 0;color:var(--accent-text);font:600 14px var(--font);cursor:pointer;text-decoration:underline;text-underline-offset:3px;min-height:44px}
[data-theme="dark"] .linkish{color:var(--mint)}

/* home */
.hero{position:relative;padding:40px 0 24px;text-align:center}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px;-webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse at 50% 30%,#000 30%,transparent 75%);pointer-events:none}
.hero>*{position:relative}
.hero .logo{width:96px;height:96px;border-radius:22%;margin:0 auto 18px}
.hero h1{font-size:clamp(32px,8vw,56px);letter-spacing:-.035em;font-weight:800;max-width:14ch;margin:0 auto .3em}
.hero .sub{color:var(--text-muted);font-size:clamp(16px,2.5vw,19px);margin-bottom:22px}
.hero-cta{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-cta .btn{min-width:200px}
@media(min-width:1024px){.hero{padding:88px 0 40px}}
.featured{position:relative;overflow:hidden;background:linear-gradient(150deg,var(--accent-soft),var(--surface) 60%);border:1px solid var(--border);border-radius:24px;padding:24px;display:grid;gap:20px}
@media(min-width:900px){.featured{grid-template-columns:1.2fr 1fr;padding:36px;align-items:center}}
.featured h2{font-size:clamp(24px,4vw,32px)}
.featured .kicker{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-text)}
[data-theme="dark"] .featured .kicker{color:var(--mint)}
.mini{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.mini .res{display:flex;align-items:center;gap:16px;margin-top:14px}
.mini .big{font-size:clamp(40px,10vw,56px);font-weight:800;letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums}
.mini .big small{font-size:.36em;font-weight:600;color:var(--text-muted);letter-spacing:0;margin-left:4px}
.clock{width:76px;height:76px;flex:none}
.clock .rim{fill:none;stroke:var(--text);stroke-width:5}
.clock .wedge{fill:var(--accent-soft)}
.clock .hand{stroke:var(--accent);stroke-width:5;stroke-linecap:round;transform-origin:50px 50px}
.clock .tick{stroke:var(--text);stroke-width:4;stroke-linecap:round}
section.block{padding:48px 0 0}
@media(min-width:1024px){section.block{padding-top:80px}}
.section-head{margin-bottom:18px}
.section-head p{color:var(--text-muted);margin:0}
.grid{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:640px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.grid{grid-template-columns:repeat(3,1fr);gap:16px}}
.tool{position:relative;display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);text-decoration:none;color:var(--text);box-shadow:var(--shadow);transition:transform .25s var(--ease),border-color .25s;min-height:132px}
.tool:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 50%,transparent);color:var(--text)}
.tool h3{margin:0;font-size:17px;padding-right:40px}
.tool p{margin:0;color:var(--text-muted);font-size:14px}
.tool .num{margin-top:auto;padding-top:6px;font-size:13px;color:var(--text);font-variant-numeric:tabular-nums}
.tool .arrow{position:absolute;right:18px;top:18px;color:var(--text-muted);transition:transform .25s var(--ease)}
.tool:hover .arrow{transform:translateX(3px);color:var(--accent)}
.tool .vchip{position:absolute;right:44px;top:17px;font-size:11px;font-weight:700;color:var(--accent-text);background:var(--accent-soft);padding:2px 8px;border-radius:999px}
[data-theme="dark"] .tool .vchip{color:var(--mint)}
/* light mode: #0F8053 text needs a near-white chip to clear 4.5:1 (on the tinted chip it was 4.16:1) */
[data-theme="light"] .tool .vchip,[data-theme="light"] .from-video a{color:#0F8053;background:#FFFFFF;box-shadow:inset 0 0 0 1px rgba(15,128,83,.35)}
.how{display:grid;gap:12px}
@media(min-width:800px){.how{grid-template-columns:repeat(3,1fr)}}
.how .card p{margin:0;color:var(--text-muted);font-size:15px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
@media(min-width:1024px){.card{padding:28px}}

/* calculator page */
.crumbs{font-size:13px;padding-top:20px}
.crumbs a{color:var(--text-muted);text-decoration:none}.crumbs a:hover{color:var(--text)}
.page-head{padding:10px 0 4px}
.page-head .intro{color:var(--text-muted);font-size:17px;max-width:62ch;margin:0 0 14px}
.from-video{display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-muted);background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:8px 10px 8px 14px;margin:0}
.from-video b{color:var(--text);font-weight:600}
.from-video a{display:inline-flex;align-items:center;gap:4px;font-weight:700;background:var(--accent-soft);color:var(--accent-text);border-radius:999px;padding:3px 10px;text-decoration:none}
[data-theme="dark"] .from-video a{color:var(--mint)}
.from-video a.soon,[data-theme="dark"] .from-video a.soon,[data-theme="light"] .from-video a.soon{background:transparent;color:var(--text-muted);box-shadow:inset 0 0 0 1px var(--border-2);font-weight:600;cursor:default}
.calc{display:grid;gap:16px;padding:18px 0 0}
@media(min-width:1024px){.calc{grid-template-columns:5fr 7fr;gap:24px;align-items:start}.results{position:sticky;top:72px}}
.inputs{display:grid;gap:20px;align-content:start}
.presets{display:flex;flex-wrap:wrap;gap:8px;padding:2px}   /* wraps on phones instead of hiding chips off the right edge */
.field{display:grid;gap:8px;min-width:0}
.field[hidden]{display:none}
.field-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.field label,.field .label{font-size:13px;font-weight:500;letter-spacing:.02em;color:var(--text)}
.field .opt{color:var(--text-muted);font-weight:400}
.help{font-size:12.5px;color:var(--text-muted);margin-top:-2px}
.field-row{display:grid;grid-template-columns:1fr 132px;gap:12px;align-items:center}
.field-row:not(:has(input[type=range])){grid-template-columns:1fr}
.input-wrap{position:relative;display:flex;align-items:center;min-height:48px;background:var(--surface-2);border:1px solid transparent;border-radius:var(--r-sm);transition:border-color .2s,box-shadow .2s}
.input-wrap:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.input-wrap .pre{padding-left:12px;color:var(--text-muted);font-weight:600}
.input-wrap .suf{padding-right:12px;color:var(--text-muted);font-weight:600;font-size:14px}
.input-wrap input,.input-wrap select{flex:1;min-width:0;width:100%;background:transparent;border:0;outline:0;color:var(--text);font:600 16px/1.2 var(--font);font-variant-numeric:tabular-nums;padding:12px 10px}
.input-wrap .pre+input{padding-left:4px}
.input-wrap select{appearance:none;-webkit-appearance:none;cursor:pointer;padding-right:34px}
.input-wrap.select::after{content:"";position:absolute;right:16px;top:19px;width:7px;height:7px;border-right:2px solid var(--text-muted);border-bottom:2px solid var(--text-muted);transform:rotate(45deg);pointer-events:none}
.field textarea{width:100%;background:var(--surface-2);border:1px solid transparent;border-radius:var(--r-sm);color:var(--text);font:500 14px/1.5 var(--mono);padding:12px;resize:vertical;min-height:88px}
.field textarea:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field.invalid .input-wrap,.field.invalid textarea{border-color:var(--negative)}
.err{font-size:13px;color:var(--negative);font-weight:500}.err:empty{display:none}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:44px;background:transparent;margin:0;cursor:pointer;--p:50%;touch-action:pan-y}
input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:99px;background:linear-gradient(90deg,var(--accent) var(--p),var(--surface-2) var(--p))}
input[type=range]::-moz-range-track{height:6px;border-radius:99px;background:var(--surface-2)}
input[type=range]::-moz-range-progress{height:6px;border-radius:99px;background:var(--accent)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:24px;height:24px;margin-top:-9px;border-radius:50%;background:#fff;border:0;box-shadow:0 0 0 1px rgba(0,0,0,.08),0 2px 6px rgba(0,0,0,.35);transition:transform .15s var(--ease)}
input[type=range]::-moz-range-thumb{width:24px;height:24px;border-radius:50%;background:#fff;border:0;box-shadow:0 2px 6px rgba(0,0,0,.35)}
input[type=range]:active::-webkit-slider-thumb{transform:scale(1.15)}
input[type=range]:focus-visible{outline:none}
input[type=range]:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 3px var(--bg),0 0 0 5px var(--accent)}
.seg{display:flex;gap:4px;padding:4px;background:var(--surface-2);border-radius:var(--r-sm)}
.seg button{flex:1;min-height:40px;border:0;border-radius:9px;background:transparent;color:var(--text-muted);font:600 14px/1 var(--font);cursor:pointer;transition:background .2s,color .2s}
.seg button[aria-checked="true"]{background:var(--bg);color:var(--text);box-shadow:0 1px 3px rgba(0,0,0,.25)}
.switch{display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;min-height:44px}
.switch input{position:absolute;opacity:0;pointer-events:none}
.switch .track{position:relative;width:46px;height:28px;border-radius:99px;background:var(--surface-2);flex:none;transition:background .2s}
.switch .track::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:transform .25s var(--ease)}
.switch input:checked+.track{background:var(--accent)}
.switch input:checked+.track::after{transform:translateX(18px)}
.switch input:focus-visible+.track{outline:2px solid var(--accent);outline-offset:2px}
.rows{display:grid;gap:10px}
.row-card{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:12px;border-radius:var(--r-sm);background:var(--surface-2)}
.row-card .full{grid-column:1/-1;display:flex;gap:8px;align-items:center}
.row-card input{width:100%;min-width:0;min-height:40px;background:var(--bg);border:1px solid var(--border);border-radius:9px;color:var(--text);font:600 15px var(--font);padding:8px 10px}
.row-card input:focus{outline:0;border-color:var(--accent)}
.row-card label{display:grid;gap:4px;font-size:11px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.reset-row{margin-top:-6px}

/* results */
.results{display:grid;gap:14px;min-width:0}
.result-card{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:opacity .2s}
@media(min-width:1024px){.result-card{padding:28px}}
.result-card::before{content:"";position:absolute;inset:0;background:radial-gradient(420px 180px at 0 0,var(--accent-soft),transparent 70%);pointer-events:none}
.result-card>*{position:relative}
.result-card.dim{opacity:.55}
.hero-label{font-size:14px;color:var(--text-muted);font-weight:500}
.big-number{font-size:clamp(40px,11vw,64px);font-weight:800;letter-spacing:-.02em;line-height:1.05;margin:6px 0 4px;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1,"cv11" 1;min-height:1.05em;overflow-wrap:anywhere}
.big-number.small{font-size:clamp(30px,8vw,48px)}
.big-number.fit{white-space:nowrap;overflow-wrap:normal;overflow:hidden}
.big-number.neg{color:var(--negative)}
.big-number.pos{color:var(--accent)}
.hero-sub{color:var(--text-muted);font-size:15px}
.hero-sub:empty{display:none}
.hero-sub b{color:var(--text)}
.stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 16px;margin:18px 0 0;padding:16px 0 0;border-top:1px solid var(--border)}
.stat{min-width:0}
.stat.wide{grid-column:1/-1}
.stat dt{font-size:12.5px;color:var(--text-muted);font-weight:500;letter-spacing:.01em}
.stat dd{margin:2px 0 0;font-size:clamp(17px,4.4vw,21px);font-weight:700;letter-spacing:-.02em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.stat .s{font-size:12.5px;color:var(--text-muted)}.stat .s:empty{display:none}
.stat.neg dd{color:var(--negative)}.stat.pos dd{color:var(--accent)}
[data-theme="light"] .stat.pos dd,[data-theme="light"] .big-number.pos{color:var(--accent-text)}
.formula{margin-top:16px;font:500 13px/1.7 var(--mono);color:var(--text-muted);overflow-wrap:anywhere}
.formula>div+div{margin-top:4px}
.formula b{color:var(--text);font-weight:650}
.warn{background:color-mix(in srgb,var(--warn) 14%,transparent);border-radius:var(--r-sm);border-left:4px solid var(--warn);padding:12px 14px;font-size:14px;color:var(--text)}
.strip{margin:0;font-size:13px;color:var(--text-muted);line-height:1.55}
.strip strong{color:var(--text)}
.strip .strip-line{display:block;margin-top:4px}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;min-width:0;box-shadow:var(--shadow)}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.panel-head h2{font-size:16px;margin:0}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--text-muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:14px;height:3px;border-radius:2px;background:var(--c)}
.legend i.dash{background:repeating-linear-gradient(90deg,var(--c) 0 4px,transparent 4px 7px)}
.chart-box{position:relative;height:240px;touch-action:pan-y}
@media(min-width:700px){.chart-box{height:300px}}
.chart-box svg{font-family:var(--font);font-variant-numeric:tabular-nums}
.chart-box svg:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.chart-tip{position:absolute;pointer-events:none;opacity:0;background:var(--surface-2);border:1px solid var(--border-2);color:var(--text);border-radius:10px;padding:8px 10px;font-size:12.5px;line-height:1.5;white-space:nowrap;transition:opacity .15s;z-index:2;box-shadow:0 8px 24px -8px rgba(0,0,0,.5)}
.chart-tip .tt{font-weight:700;margin-bottom:2px}
.chart-tip i{display:inline-block;width:8px;height:8px;border-radius:2px;margin-right:6px}
.share-row{display:flex;gap:8px;flex-wrap:wrap}
.share-row .btn{flex:1 1 auto}
@media(min-width:640px){.share-row .btn{flex:0 0 auto}}
details.more summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;min-height:28px}
details.more summary::-webkit-details-marker{display:none}
details.more summary::after{content:"+";font-size:22px;color:var(--text-muted);transition:transform .2s}
details.more[open] summary::after{transform:rotate(45deg)}
details.more[open] summary{margin-bottom:12px}
.table-wrap{overflow:auto;max-height:420px;border-radius:10px;border:1px solid var(--border)}
table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
th,td{padding:9px 12px;text-align:right;white-space:nowrap;border-bottom:1px solid var(--border)}
th:first-child,td:first-child{text-align:left}
thead th{position:sticky;top:0;background:var(--surface-2);color:var(--text-muted);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.03em}
tbody th{font-weight:600}
tbody tr:nth-child(even){background:color-mix(in srgb,var(--surface-2) 45%,transparent)}
tr.hl th,tr.hl td{color:var(--accent-text);font-weight:700}
[data-theme="dark"] tr.hl th,[data-theme="dark"] tr.hl td{color:var(--mint)}
.extra{display:grid;gap:12px}
.video-box{margin-top:14px}
.video-link{display:flex;align-items:center;gap:12px;min-height:52px;padding:10px 12px;border-radius:var(--r-sm);background:var(--surface-2);color:var(--text);text-decoration:none;font-weight:600;font-size:15px;margin-top:8px}
.video-link .play{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--accent-btn);color:var(--on-accent);font-size:12px;flex:none}
.video-link .go,.video-link .badge{margin-left:auto;flex:none}
.video-link.soon{color:var(--text-muted)}.video-link.soon .play{background:var(--border-2);color:var(--text-muted)}
.video-link:hover{color:var(--text);filter:brightness(1.1)}
.cmp{display:grid;gap:10px}
@media(min-width:560px){.cmp{grid-template-columns:1fr 1fr}}
.cmp .card{padding:16px}
.cmp h3{font-size:15px;margin-bottom:8px}
.cmp dl{display:grid;grid-template-columns:auto auto;gap:4px 12px;margin:0;font-size:14px}
.cmp dt{color:var(--text-muted)}.cmp dd{margin:0;text-align:right;font-weight:650;font-variant-numeric:tabular-nums}
.rules{font-size:14px;color:var(--text-muted)}.rules ul{margin:6px 0 0;padding-left:18px}.rules li{margin:3px 0}

/* article + prose */
.article{max-width:68ch;padding:8px 0 0}
.article h2{margin-top:1.6em}.article h3{margin-top:1.3em}
.article p,.article li{color:var(--text-muted);line-height:1.7}
.article strong{color:var(--text)}
.article code{font:500 .88em var(--mono);background:var(--surface-2);padding:2px 6px;border-radius:6px;color:var(--text)}
.article .eq{display:block;font:500 14px/1.6 var(--mono);background:var(--surface);border:1px solid var(--border);border-radius:var(--r-sm);padding:12px 14px;overflow-x:auto;white-space:nowrap;color:var(--text);margin:12px 0}
.sources{font-size:14px}.sources li{color:var(--text-muted)}
.reviewed{font-size:13px;color:var(--text-muted)}
.sep{border:0;border-top:1px solid var(--border);margin:32px 0}
@media(min-width:1024px){.sep{margin:48px 0}}
.related .grid{margin-top:12px}
.prose{max-width:72ch;padding:24px 0 8px}
.prose p,.prose li{color:var(--text-muted);line-height:1.7}
.prose h2{margin-top:1.6em;font-size:20px}
.draft{display:inline-block;font-size:12px;font-weight:700;color:var(--warn);border:1px solid currentColor;border-radius:999px;padding:2px 10px;margin-bottom:10px}

/* email + ads */
.signup{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin:32px 0}
.signup form{display:flex;flex-direction:column;gap:10px}
.signup input[type=email]{min-height:48px;border-radius:var(--r-sm);border:1px solid var(--border-2);background:var(--surface-2);color:var(--text);padding:0 14px;font:500 16px var(--font)}
.signup .fine{font-size:12.5px;color:var(--text-muted);margin:10px 0 0}.signup .msg{font-size:14px;font-weight:600;margin:6px 0 0}.signup .msg.err{color:var(--negative)}
@media(min-width:640px){.signup form{flex-direction:row}.signup input[type=email]{flex:1}}
.ad-slot{margin:32px 0;padding-top:32px;border-top:1px solid var(--border)}
@media(min-width:1024px){.ad-slot{margin:48px 0;padding-top:48px}}
.ad-label{font-size:12px;color:var(--text-muted);margin-bottom:6px;text-align:center}
.ad-box{min-height:280px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:grid;place-items:center;color:var(--text-muted);font-size:13px}
@media(min-width:1024px){.ad-A .ad-box,.ad-C .ad-box{min-height:120px}}

/* footer */
.site-footer{margin-top:56px;border-top:1px solid var(--border);padding:32px 0 40px;color:var(--text-muted);font-size:14px}
.site-footer .disc{max-width:72ch;margin-bottom:18px}
.site-footer .disc strong{color:var(--text)}
.site-footer nav{display:flex;flex-wrap:wrap;gap:4px 18px;margin-bottom:14px}
.site-footer nav a{color:var(--text-muted);text-decoration:none;min-height:32px;display:inline-flex;align-items:center}
.site-footer nav a:hover{color:var(--text)}
.site-footer .meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px}

/* links page */
.links-page{max-width:460px;margin:0 auto;padding:32px 16px 40px;text-align:center}
.links-page .logo{width:72px;height:72px;border-radius:22%;margin:0 auto 12px}
.links-page h1{font-size:26px;margin-bottom:2px}
.links-page .tag{color:var(--text-muted);margin:0}
.links-page .edu{font-size:13px;color:var(--text-muted);margin:6px 0 22px}
.link-stack{display:grid;gap:12px;text-align:left}
.lbtn{display:flex;align-items:center;gap:12px;min-height:56px;padding:12px 16px;border-radius:16px;background:var(--surface);border:1px solid var(--border);color:var(--text);text-decoration:none;font-weight:650;font-size:16px;transition:transform .15s var(--ease),border-color .2s}
.lbtn:hover{color:var(--text);border-color:color-mix(in srgb,var(--accent) 50%,transparent)}
.lbtn:active{transform:scale(.98)}
.lbtn small{display:block;font-size:12.5px;font-weight:500;color:var(--text-muted)}
.lbtn .go{margin-left:auto;color:var(--text-muted)}
.lbtn.pin{background:var(--accent-btn);border-color:var(--accent-btn);color:var(--on-accent);min-height:72px}
.lbtn.pin small{color:inherit;opacity:.8}.lbtn.pin .go{color:inherit}
.stack-label{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin:14px 0 0}
.social-row{display:flex;justify-content:center;gap:12px;margin:22px 0 0}
.social-row a{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 16px;border-radius:999px;border:1px solid var(--border-2);color:var(--text);text-decoration:none;font-weight:600;font-size:14px}
.social-row svg{width:18px;height:18px}

/* printable */
.printable{max-width:800px;margin:0 auto;padding:24px 16px}
.printable table{margin:8px 0 18px}
.printable .ws td{height:34px}
@media print{
  :root,[data-theme]{--bg:#fff;--surface:#fff;--surface-2:#f2f4f7;--text:#1B2442;--text-muted:#58627D;--border:#d6dbe4;--accent-text:#0F8053}
  .site-header,.site-footer nav,.no-print,.ad-slot{display:none!important}
  body{font-size:12pt}.printable{padding:0}.page-break{break-before:page}
}

/* toast, motion */
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,16px);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:999px;font-weight:600;font-size:14px;opacity:0;pointer-events:none;transition:all .3s var(--ease);z-index:90}
.toast.show{opacity:1;transform:translate(-50%,0)}
.reveal{opacity:0;transform:translateY(8px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}
.clock-panel{display:flex;align-items:center;gap:16px}
.clock-panel .clock{width:64px;height:64px}
.clock-panel b{color:var(--text)}
/* mini clocks, split bar */
.mini-clocks{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.mini-clock{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 10px;background:var(--surface-2);border:1px solid var(--border);border-radius:14px;text-align:center;font-size:13px}
.mini-clock svg{width:56px;height:56px}.mini-clock .rim{fill:none;stroke:var(--border-2);stroke-width:5}
.mini-clock .hand{stroke:var(--accent);stroke-width:5;stroke-linecap:round;transform-origin:50px 50px;animation:dt-spin linear infinite}
.mini-clock span{color:var(--text-muted)}
@keyframes dt-spin{to{transform:rotate(360deg)}}
.split-bar{display:flex;height:14px;border-radius:7px;overflow:hidden;margin:10px 0 8px;background:var(--surface-2)}
.split-bar .neg{background:var(--negative)}.split-bar .pos{background:var(--accent)}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:4px;vertical-align:0}.dot.neg{background:var(--negative)}.dot.pos{background:var(--accent)}
.table-wrap th[scope=row]{text-align:left;color:var(--text-muted);font-weight:600}
@media (prefers-reduced-motion:reduce){.mini-clock .hand{animation:none}}
.race{display:grid;grid-template-columns:96px 1fr auto;align-items:center;gap:10px;font-size:14px;margin-top:8px}.race .split-bar{margin:0}
.waterfall{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;font-size:14px}.waterfall span{background:var(--surface-2);border-radius:10px;padding:6px 10px;color:var(--text-muted)}.waterfall b{color:var(--text)}.waterfall .eq{background:var(--accent-soft)}
/* legal, printable extras */
.legal{margin:0 auto}.legal h1{font-size:clamp(28px,5vw,40px)}
.panel .table-wrap td{white-space:normal;text-align:left;min-width:120px}
.sheet-head{display:flex;align-items:center;gap:12px;margin-bottom:10px}.sheet-head .btn{margin-left:auto}
.sheet h1{font-size:30px;margin:12px 0 4px}.sheet h2{font-size:19px;margin:22px 0 8px}
.sheet-clock{display:flex;align-items:center;gap:18px}.formulas,.checklist{padding-left:18px;line-height:1.8}.formulas code{font-family:var(--mono);font-size:13.5px}
.checklist{list-style:"☐  "}.sheet-foot{margin-top:28px;padding-top:10px;border-top:1px solid var(--border);font-size:12.5px;color:var(--text-muted)}
@media print{.sheet .table-wrap{max-height:none;overflow:visible}.sheet h2{break-after:avoid}}
.sheet .table-wrap{max-height:none}
@media print{body[data-page=printable] .site-footer{display:none!important}.sheet th,.sheet td{padding:5px 10px}.sheet .ws td{height:28px}}
.article b{color:var(--text)}