:root{
  --bg:#07061A;--surface:#100E2C;--surface-2:#1A1745;--ink:#F6F5FF;--ink-2:#C6C2EE;--ink-3:#908CC0;--line:#2D2960;
  --brand:#5CE1FF;--brand-2:#A5F3FF;--key:#00E5FF;--key-2:#5B3FD9;--on-key:#FFFFFF;
  --grad:linear-gradient(120deg,#00E5FF 0%,#7C4DFF 50%,#FF3DCB 100%);
  --btn-grad:linear-gradient(120deg,#5B6CFF 0%,#A43DFF 55%,#FF3DCB 100%);
  --gold-grad:var(--btn-grad);
  --lcd:#050416;--lcd-ink:#72F4FF;--lcd-line:#2E2A78;--lcd-dim:#9B97E0;--glow:0 0 16px rgba(0,229,255,.6),0 0 40px rgba(124,77,255,.4);
  --fin:#00F5A0;--hea:#FF3D7F;--mat:#9A86FF;--con:#00D4FF;
  --k1:#00E5FF;--k2:#FF3DCB;--k3:#00F5A0;--k4:#9A86FF;--k5:#FFB020;
  --shadow:0 20px 44px -22px rgba(0,0,0,.95);
  --r-sm:10px;--r-md:14px;--r-lg:22px;
  --f:"Schibsted Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"Chivo Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:dark;
  box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
}
:root[data-theme="light"]{
  --bg:#F5F4FF;--surface:#FFFFFF;--surface-2:#EEECFF;--ink:#14122E;--ink-2:#4A4775;--ink-3:#77749C;--line:#DEDBF5;
  --brand:#5B3FD9;--brand-2:#3F27B0;--key:#6A4DFF;--key-2:#4B2FD9;--on-key:#FFFFFF;
  --lcd:#0A0826;--lcd-ink:#72F4FF;--lcd-line:#2E2A78;--lcd-dim:#9B97E0;
  --fin:#00A870;--hea:#E0245E;--mat:#5B4DE0;--con:#0096C7;
  --k1:#00A8C7;--k2:#E0249E;--k3:#00A870;--k4:#6A4DFF;--k5:#E08A00;
  --shadow:0 16px 36px -22px rgba(40,30,120,.45);color-scheme:light}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 80px)}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--f);-webkit-font-smoothing:antialiased}
body.has-sticky{padding-bottom:70px}
img,svg{max-width:100%}
a{color:var(--brand)}
a:hover{color:var(--brand-2)}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:6px}
h1,h2,h3{line-height:1.12;letter-spacing:-.018em;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.4vw,3.3rem);font-weight:800}
h2{font-size:clamp(1.35rem,2.4vw,1.75rem);font-weight:700}
h3{font-size:1.1rem;font-weight:700}
p{margin:0 0 1em;max-width:70ch}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.muted{color:var(--ink-3)}
.skip{position:absolute;left:-999px;top:8px;z-index:100;background:var(--surface);padding:8px 12px;border:1px solid var(--line);border-radius:8px;font:inherit}
.skip:focus{left:12px}

/* header */
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hbar{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;letter-spacing:-.03em;color:var(--ink);text-decoration:none;flex:none}
.logo svg{width:32px;height:32px}
.nav{display:flex;gap:2px;align-items:center}
.nav a{color:var(--ink-2);text-decoration:none;font-weight:500;font-size:.95rem;padding:8px 10px;border-radius:8px;white-space:nowrap}
.nav a:hover{background:var(--surface-2);color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);background:var(--surface-2)}
.hsearch{margin-left:auto;position:relative;width:240px}
.hsearch input{width:100%;height:40px;border:1.5px solid var(--line);border-radius:999px;padding:0 14px 0 36px;background:var(--bg);color:var(--ink);font:inherit;font-size:.92rem}
.hsearch svg{position:absolute;left:12px;top:11px;width:18px;height:18px;color:var(--ink-3)}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border:1.5px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);cursor:pointer;flex:none}
.icon-btn svg{width:20px;height:20px}
.menu-btn{display:none}
.drawer{display:none;border-top:1px solid var(--line);padding:14px 20px 20px;background:var(--surface)}
.drawer.open{display:block}
.drawer nav a{display:block;padding:12px 4px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none;font-weight:500}
.drawer .hsearch{width:100%;margin:0 0 8px}
@media (max-width:1180px){#theme{margin-left:auto}}
@media (max-width:900px){.hbar .nav{display:none}.menu-btn{display:grid}}
/* quick shortcuts bar */
.quickbar{border-top:1px solid var(--line)}
.qb{display:flex;gap:8px;overflow-x:auto;padding:9px 20px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.qb::-webkit-scrollbar{display:none}
.qb a{flex:none;display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);color:var(--ink);text-decoration:none;font-size:.86rem;font-weight:500;white-space:nowrap}
.qb a i{width:7px;height:7px;border-radius:50%;background:var(--cat);box-shadow:0 0 8px var(--cat)}
.qb a:hover{border-color:var(--cat);box-shadow:0 0 14px -4px var(--cat)}
.qb a[aria-current="page"]{border-color:var(--cat);background:color-mix(in srgb,var(--cat) 18%,var(--surface-2))}
@media (max-width:1180px){.hbar .hsearch{display:none}}


/* search suggestions */
.suggest{position:absolute;left:0;right:0;top:calc(100% + 6px);list-style:none;margin:0;padding:6px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow);z-index:60;max-height:360px;overflow:auto}
.suggest[hidden]{display:none}
.suggest a{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;border-radius:8px;color:var(--ink);text-decoration:none}
.suggest li[aria-selected="true"] a,.suggest a:hover{background:var(--surface-2)}
.suggest small{color:var(--ink-3)}
.suggest .none{padding:10px 12px;color:var(--ink-2);font-size:.92rem}

/* ads */
.ad{display:grid;place-items:center;text-align:center;border:1.5px dashed var(--line);border-radius:var(--r-sm);color:var(--ink-3);font-size:.8rem;background:repeating-linear-gradient(135deg,transparent 0 10px,color-mix(in srgb,var(--surface-2) 60%,transparent) 10px 20px);padding:10px}
.ad b{display:block;color:var(--ink-2);font-weight:600;font-size:.85rem}
.ad-leader{min-height:90px;margin:16px auto}
.ad-content{min-height:250px;margin:32px 0}
.ad-side{min-height:600px}
.ad-foot{min-height:90px;margin:40px auto 0}
.sticky-ad{position:fixed;left:0;right:0;bottom:0;z-index:40;display:none;align-items:center;gap:8px;background:var(--surface);border-top:1px solid var(--line);padding:8px 10px calc(8px + env(safe-area-inset-bottom,0px))}
.sticky-ad .ad{flex:1;min-height:50px;padding:4px}
@media (max-width:760px){.sticky-ad.show{display:flex}}

/* breadcrumbs */
.crumbs{margin:18px auto 8px;font-size:.88rem;color:var(--ink-3)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--ink-2);text-decoration:none}
.crumbs a:hover{text-decoration:underline}

/* LCD — the signature element */
.lcd{background:var(--lcd);color:var(--lcd-ink);border-radius:var(--r-md);padding:18px 20px;box-shadow:inset 0 2px 0 rgba(0,0,0,.06),inset 0 0 0 1px var(--lcd-line);position:relative;overflow:hidden}
.lcd::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.14),transparent 40%);pointer-events:none}
.lcd-label{display:block;font-size:.9rem;color:var(--lcd-dim);font-weight:500}
.lcd-value{display:block;font-family:var(--mono);font-size:clamp(2rem,6vw,3.1rem);line-height:1.15;letter-spacing:-.03em;font-weight:500;word-break:break-word;font-variant-numeric:tabular-nums}
.lcd-sub{display:block;margin-top:6px;font-size:.95rem;color:var(--lcd-dim)}

/* keycaps */
.key{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 14px;border-radius:var(--r-sm);background:var(--surface);color:var(--ink);text-decoration:none;font-weight:500;font-size:.94rem;border:1px solid var(--line);border-bottom-width:3px;transition:transform .06s,border-bottom-width .06s;cursor:pointer;font-family:inherit}
.key:hover{color:var(--ink);border-color:color-mix(in srgb,var(--cat,var(--brand)) 50%,var(--line))}
.key:active{transform:translateY(2px);border-bottom-width:1px}
.keys-flow{display:flex;flex-wrap:wrap;gap:8px}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:48px;align-items:center;padding:40px 0 24px}
.hero h1{max-width:15ch}
.hero p.lede{font-size:1.15rem;color:var(--ink-2);max-width:48ch}
.device{background:var(--ink);border-radius:28px;padding:18px;box-shadow:var(--shadow)}
:root[data-theme="dark"] .device{background:#0C0E10}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .device{background:#0C0E10}}
.device .lcd{padding:16px 18px}
.device .hs{position:relative}
.device input{width:100%;border:0;background:transparent;color:var(--lcd-ink);font-family:var(--mono);font-size:clamp(1.3rem,3vw,1.8rem);padding:6px 0;outline:none}
.device input::placeholder{color:var(--lcd-dim);opacity:.8}
.device .lcd:focus-within{box-shadow:inset 0 2px 0 rgba(0,0,0,.06),inset 0 0 0 2px var(--key)}
.device .suggest{top:calc(100% + 14px)}
.devkeys{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}
.devkeys a{display:flex;flex-direction:column;gap:2px;padding:12px 14px;border-radius:12px;background:#2C3238;color:#EEF1F3;text-decoration:none;font-weight:600;border-bottom:3px solid #1A1E22;transition:transform .06s}
.devkeys a small{color:#A7B0B8;font-weight:400;font-size:.8rem}
.devkeys a:active{transform:translateY(2px)}
.devkeys a.eq{background:var(--key);border-bottom-color:var(--key-2);color:#fff}
.devkeys a.eq small{color:rgba(255,255,255,.8)}
@media (max-width:900px){.hero{grid-template-columns:1fr;gap:28px;padding-top:24px}}

section.block{padding:36px 0}
.sec-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.sec-head p{margin:0;color:var(--ink-2)}

/* featured */
.feat{display:grid;grid-template-columns:1.4fr 1fr 1fr;grid-template-rows:auto auto;gap:14px}
.feat a{display:flex;flex-direction:column;justify-content:space-between;gap:18px;padding:20px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);color:var(--ink);text-decoration:none;min-height:150px;position:relative}
.feat a:hover{border-color:var(--cat)}
.feat a:first-child{grid-row:span 2;background:var(--ink);color:var(--bg);border-color:var(--ink)}
.feat a:first-child p{color:color-mix(in srgb,var(--bg) 75%,transparent)}
.feat h3{font-size:1.25rem;margin:0}
.feat p{margin:0;color:var(--ink-2);font-size:.95rem}
.feat .tag{font-size:.82rem;font-weight:600;color:var(--cat)}
.feat a:first-child .tag{color:var(--key)}
.feat .big{font-family:var(--mono);font-size:clamp(2rem,4vw,2.8rem);letter-spacing:-.03em}
@media (max-width:820px){.feat{grid-template-columns:1fr 1fr}.feat a:first-child{grid-column:span 2;grid-row:auto}}
@media (max-width:520px){.feat{grid-template-columns:1fr}.feat a:first-child{grid-column:auto}}

/* category keypads */
.pads{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.pad{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;border-top:5px solid var(--cat)}
.pad h3{font-size:1.3rem;display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.pad h3 a{color:var(--ink);text-decoration:none}
.pad h3 a:hover{color:var(--cat)}
.pad h3 span{font-size:.85rem;font-weight:500;color:var(--ink-3)}
.pad p{color:var(--ink-2);font-size:.95rem}
.pad .key{font-size:.88rem;padding:7px 11px}
@media (max-width:820px){.pads{grid-template-columns:1fr}}
.soon{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;align-items:center}
.soon span{padding:6px 12px;border-radius:999px;border:1.5px dashed var(--line);color:var(--ink-3);font-size:.88rem}

.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:820px){.two{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px}
.rank{list-style:none;margin:0;padding:0;counter-reset:r}
.rank li{counter-increment:r;border-top:1px solid var(--line)}
.rank li:first-child{border-top:0}
.rank a{display:flex;align-items:center;gap:14px;padding:11px 2px;color:var(--ink);text-decoration:none}
.rank a:hover{color:var(--brand)}
.rank.num a::before{content:counter(r);font-family:var(--mono);color:var(--ink-3);width:1.4em}
.rank small{margin-left:auto;color:var(--ink-3);font-size:.82rem}
.dot{width:8px;height:8px;border-radius:50%;background:var(--cat);flex:none}

.edu{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:start}
@media (max-width:820px){.edu{grid-template-columns:1fr}}
.posts{display:grid;gap:12px}
.post-row{display:grid;grid-template-columns:92px 1fr;gap:16px;align-items:center;padding:12px;border-radius:var(--r-md);background:var(--surface);border:1px solid var(--line);color:var(--ink);text-decoration:none}
.post-row:hover{border-color:var(--cat)}
.post-row h3{margin:0 0 4px;font-size:1.02rem}
.post-row p{margin:0;font-size:.9rem;color:var(--ink-2)}
.thumb{aspect-ratio:1;border-radius:10px;overflow:hidden}

.faq details{border-top:1px solid var(--line);padding:4px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--ink-3);font-size:1.2rem;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--ink-2)}

/* page grid */
.page-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:start;padding-bottom:20px}
.sidebar{display:grid;gap:18px;position:sticky;top:calc(env(safe-area-inset-top,0px) + 80px)}
@media (max-width:980px){.page-grid{grid-template-columns:minmax(0,1fr)}.sidebar{position:static}.sidebar .ad-side{display:none}}
.side-list h2{font-size:1.05rem}
.side-list a{display:block;padding:7px 0;color:var(--ink-2);text-decoration:none;border-top:1px solid var(--line);font-size:.94rem}
.side-list a:hover{color:var(--brand)}
.side-list a[aria-current="page"]{color:var(--ink);font-weight:600}

.calc-head{margin:6px 0 20px;padding-left:16px;border-left:5px solid var(--cat)}
.calc-head p{color:var(--ink-2);font-size:1.08rem;margin:0}
.tool{margin-bottom:16px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px 18px}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.inwrap{position:relative;display:flex;align-items:center}
.inwrap .pre,.inwrap .suf{position:absolute;color:var(--ink-3);font-size:.92rem;pointer-events:none}
.inwrap .pre{left:12px}.inwrap .suf{right:12px}
.field input,.field select,.field textarea{width:100%;min-height:48px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:var(--bg);color:var(--ink);font:inherit;padding:10px 12px;font-variant-numeric:tabular-nums}
.field textarea{min-height:90px;resize:vertical;font-family:var(--mono);font-size:.95rem}
.field.wide{grid-column:1/-1}
.field input.has-pre{padding-left:28px}
.field input.has-suf{padding-right:52px}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 22%,transparent)}
.field [aria-invalid="true"]{border-color:var(--hea)}
.err{display:block;color:var(--hea);font-size:.84rem;min-height:0;margin-top:4px}
.err:empty{display:none}
.actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:var(--r-sm);font:inherit;font-weight:600;cursor:pointer;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);text-decoration:none}
.btn.primary{background:var(--key);border-color:var(--key);color:var(--on-key);border-bottom:3px solid var(--key-2)}
.btn.primary:active{transform:translateY(2px);border-bottom-width:1.5px}
.btn:hover{border-color:var(--ink-3)}
.btn.primary:hover{border-color:var(--key-2)}

.result{padding:0;overflow:hidden}
.result .lcd{border-radius:0;padding:22px 22px 20px}
.res-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;padding:22px}
.res-body.solo{grid-template-columns:1fr}
@media (max-width:700px){.res-body{grid-template-columns:1fr}}
.rows{margin:0;display:grid;align-content:start}
.rows div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid var(--line)}
.rows dt{color:var(--ink-2)}
.rows dd{margin:0;font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
.res-error{padding:22px;margin:0;color:var(--hea);font-weight:500}
.res-note{padding:0 22px 20px;margin:0;color:var(--ink-3);font-size:.88rem}
.chart{margin:0}
.chart svg{width:100%;height:auto;display:block}
.chart text{fill:var(--ink-3);font:12px var(--f)}
.donut{display:grid;grid-template-columns:140px 1fr;gap:16px;align-items:center}
.donut figcaption,.legend{display:grid;gap:6px;font-size:.88rem;color:var(--ink-2)}
.legend{grid-auto-flow:column;justify-content:start;gap:16px;margin-top:6px}
.donut i,.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:7px;vertical-align:0}
.donut b{color:var(--ink)}
.chart-wide{padding:0 22px 22px}
.tbl{overflow-x:auto;padding:0 22px 22px}
.tbl table{width:100%;border-collapse:collapse;font-size:.9rem;font-variant-numeric:tabular-nums;min-width:420px}
.tbl th,.tbl td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.tbl th:first-child,.tbl td:first-child{text-align:left}
.tbl th{color:var(--ink-3);font-weight:600;font-size:.84rem}

.explain{margin-top:8px}
.explain h2{margin-top:1.4em}
.explain h3{margin-top:1.2em}
.formula{font-family:var(--mono);font-size:.95rem;background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--cat);padding:14px 16px;border-radius:var(--r-sm);max-width:none;overflow-x:auto}
.explain ul{padding-left:1.2em}
.explain li{margin:.3em 0}

.aff{margin:28px 0}
.aff-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.aff-card{border:1px solid var(--line);border-radius:var(--r-md);padding:16px;background:var(--surface);display:flex;flex-direction:column;gap:10px}
.aff-card small{color:var(--ink-3)}
.aff-card h3{margin:0;font-size:1rem}
.aff-card p{margin:0;font-size:.9rem;color:var(--ink-2)}
.aff-card .btn{min-height:38px;font-size:.9rem;margin-top:auto}

/* category page */
.cat-hero{padding:8px 0 22px;border-bottom:1px solid var(--line);margin-bottom:24px}
.cat-hero p{font-size:1.1rem;color:var(--ink-2)}
.calc-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.calc-card{display:flex;flex-direction:column;gap:6px;padding:16px 18px;border-radius:var(--r-md);background:var(--surface);border:1px solid var(--line);border-bottom-width:3px;color:var(--ink);text-decoration:none;transition:transform .06s}
.calc-card:hover{border-color:color-mix(in srgb,var(--cat) 55%,var(--line));color:var(--ink)}
.calc-card:active{transform:translateY(2px)}
.calc-card b{font-size:1.02rem}
.calc-card span{font-size:.88rem;color:var(--ink-2);line-height:1.45}

/* scientific */
.sci{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:18px}
.sci .lcd{grid-column:1/-1}
.sci-top{display:flex;justify-content:space-between;align-items:center;gap:10px;min-height:28px}
.sci-top .lcd-label{font-family:var(--mono);overflow-x:auto;white-space:nowrap}
.mode{font:600 .78rem var(--mono);background:transparent;border:1.5px solid var(--lcd-dim);color:var(--lcd-ink);border-radius:6px;padding:3px 8px;cursor:pointer}
.sci-keys{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.sci-keys .key{padding:13px 4px;font-size:1rem;font-family:var(--mono)}
.sci-keys .fn{background:var(--surface-2);font-size:.9rem}
.sci-keys .op{color:var(--brand);font-weight:600}
.sci-keys .eq{background:var(--key);border-color:var(--key);border-bottom-color:var(--key-2);color:var(--on-key)}
.sci-keys .clr{color:var(--hea)}
.sci-hist h3{font-size:.95rem}
.sci-hist ol{list-style:none;margin:0;padding:0;font-family:var(--mono);font-size:.88rem;max-height:340px;overflow:auto}
.sci-hist li{padding:7px 0;border-bottom:1px solid var(--line);word-break:break-all}
.sci-hist li button{all:unset;cursor:pointer;display:block;width:100%}
.sci-hist li button:hover{color:var(--brand)}
@media (max-width:700px){.sci{grid-template-columns:1fr}}

/* blog */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.blog-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;color:var(--ink);text-decoration:none;display:flex;flex-direction:column}
.blog-card:hover{border-color:var(--cat)}
.blog-card .thumb{aspect-ratio:16/9;border-radius:0}
.blog-card div.t{padding:16px 18px 20px}
.blog-card h2{font-size:1.15rem;margin:6px 0}
.blog-card p{font-size:.92rem;color:var(--ink-2);margin:0}
.meta{font-size:.85rem;color:var(--ink-3)}
.article{max-width:720px}
.article .hero-img{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:21/9;margin:10px 0 18px}
.article .body{font-size:1.07rem;line-height:1.72}
.article .body h2{margin-top:1.6em}
.body .tbl-wrap{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);border-radius:var(--r-md)}
.body table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:420px;font-variant-numeric:tabular-nums}
.body th,.body td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left}
.body th{background:var(--surface-2);font-weight:600;color:var(--ink-2)}
.body tr:last-child td{border-bottom:0}html.embed .site-header,html.embed footer.site,html.embed .ad,html.embed .sticky-ad,html.embed .wrap:has(>.ad){display:none!important}html.embed body{background:var(--bg)}.embed-wrap{max-width:720px;margin:0 auto;padding:14px 12px}.embed-title{font-size:1.15rem;margin:0 0 10px}.embed-by{text-align:center;font-size:.85rem;color:var(--ink-3);margin:12px 0 0}.embed-box{margin-top:24px}.embed-box summary{cursor:pointer;font-weight:700}.embed-box textarea{width:100%;min-height:110px;font:12px/1.5 var(--mono);background:var(--lcd);color:var(--lcd-ink);border:1px solid var(--line);border-radius:var(--r-sm);padding:10px;margin:10px 0;resize:vertical;box-sizing:border-box}.mtc{margin:1.4em 0}.mtc h2{margin-top:0}.mtc .form-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}.mtc .tbl-wrap{margin:1em 0 .6em}.body caption{caption-side:top;text-align:left;padding:10px 14px;font-size:.82rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-3);background:var(--surface);border-bottom:1px solid var(--line)}.body h3{font-size:1.08rem;margin:1.3em 0 .4em;color:var(--ink)}.body .tnote{font-size:.85rem;color:var(--ink-3);margin-top:-.6em}.tbl-wrap.t-cmp th{background:color-mix(in srgb,var(--cat,var(--key)) 18%,var(--surface))}.tbl-wrap.t-cmp td:first-child{font-weight:600;color:var(--ink)}.tbl-wrap.t-cmp .hi{background:color-mix(in srgb,var(--cat,var(--key)) 12%,transparent);font-weight:700}.tbl-wrap.t-cmp th.hi{background:color-mix(in srgb,var(--cat,var(--key)) 32%,var(--surface));color:var(--ink)}.tbl-wrap.t-ref table{font-size:.88rem}.tbl-wrap.t-ref th,.tbl-wrap.t-ref td{padding:7px 12px;text-align:center}.tbl-wrap.t-ref tbody tr:nth-child(even) td{background:color-mix(in srgb,var(--surface-2) 55%,transparent)}.tbl-wrap.t-ref th{background:transparent;border-bottom:2px solid var(--cat,var(--key));color:var(--ink)}.tbl-wrap.t-steps{counter-reset:st;border-style:dashed}.tbl-wrap.t-steps tbody tr{counter-increment:st}.tbl-wrap.t-steps tbody td:first-child::before{content:counter(st);display:inline-grid;place-items:center;width:1.6em;height:1.6em;margin-right:.6em;border-radius:50%;background:var(--cat,var(--key));color:#05040f;font-weight:800;font-size:.78rem;vertical-align:middle}.tbl-wrap.t-steps tbody tr:last-child td{font-weight:700;border-top:2px solid var(--line)}.tbl-wrap.t-steps th{background:transparent;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-3)}.tbl-wrap.t-check td.y{color:var(--fin);font-weight:700}.tbl-wrap.t-check td.n{color:var(--hea);font-weight:700}.tbl-wrap.t-check th{background:transparent;border-bottom:2px solid var(--line)}.tbl-wrap.t-kv{max-width:560px;border-left:4px solid var(--cat,var(--key))}.tbl-wrap.t-kv table{min-width:0}.tbl-wrap.t-kv th{background:transparent;width:46%;font-weight:500;color:var(--ink-3)}.tbl-wrap.t-kv td{font-weight:700;font-variant-numeric:tabular-nums}.tbl-wrap.t-scale td:first-child{border-left:5px solid var(--cat,var(--key))}.tbl-wrap.t-scale tbody tr:nth-child(1) td:first-child{border-left-color:#00D4FF}.tbl-wrap.t-scale tbody tr:nth-child(2) td:first-child{border-left-color:#00F5A0}.tbl-wrap.t-scale tbody tr:nth-child(3) td:first-child{border-left-color:#FFB020}.tbl-wrap.t-scale tbody tr:nth-child(4) td:first-child{border-left-color:#FF7A3D}.tbl-wrap.t-scale tbody tr:nth-child(n+5) td:first-child{border-left-color:#FF3D7F}.tbl-wrap.t-scale th{background:var(--surface);border-bottom:2px solid var(--line)}.tbl-wrap.t-min{border:0;border-radius:0;border-top:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3)}.tbl-wrap.t-min th{background:transparent;border-bottom:1px solid var(--ink-3)}.tbl-wrap.t-min td{padding:8px 14px}
.body ul{padding-left:1.2em}.body li{margin:.35em 0}
.author{display:flex;gap:12px;align-items:center;margin:4px 0 8px}
.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);font-weight:700;color:var(--ink-2)}
.author-box{display:flex;gap:16px;align-items:flex-start;margin-top:28px}
.author-box p{margin:4px 0 0;color:var(--ink-2);font-size:.95rem}

.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.contact-grid .wide{grid-column:1/-1}
@media (max-width:600px){.contact-grid{grid-template-columns:1fr}}
.notice{padding:12px 14px;border-radius:var(--r-sm);background:var(--surface-2);color:var(--ink-2);font-size:.92rem;margin-top:14px}

/* footer */
footer.site{margin-top:40px;background:var(--surface);border-top:1px solid var(--line);padding:40px 0 28px}
.fgrid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:28px}
.fgrid h3{font-size:.95rem}
.fgrid a{display:block;color:var(--ink-2);text-decoration:none;font-size:.9rem;padding:3px 0}
.fgrid a:hover{color:var(--brand)}
.fgrid p{font-size:.9rem;color:var(--ink-2)}
.fbase{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:28px;padding-top:18px;font-size:.85rem;color:var(--ink-3)}
@media (max-width:900px){.fgrid{grid-template-columns:1fr 1fr}.fgrid>div:first-child{grid-column:1/-1}}


/* ---- dark luxury layer ---- */
body{background:radial-gradient(1100px 520px at 78% -8%,rgba(212,175,55,.13),transparent 62%),radial-gradient(700px 400px at -5% 30%,rgba(108,147,255,.06),transparent 60%),var(--bg);background-attachment:fixed}
:root[data-theme="light"] body{background:radial-gradient(1100px 520px at 78% -8%,rgba(212,175,55,.16),transparent 62%),var(--bg)}
.site-header{background:color-mix(in srgb,var(--bg) 82%,transparent);border-bottom-color:color-mix(in srgb,var(--key) 22%,var(--line))}
.hero h1{background:linear-gradient(180deg,var(--ink) 30%,color-mix(in srgb,var(--key) 70%,var(--ink)));-webkit-background-clip:text;background-clip:text;color:transparent}
.lcd-value{text-shadow:var(--glow)}
.lcd{box-shadow:inset 0 0 0 1px var(--lcd-line),inset 0 12px 30px rgba(0,0,0,.45)}
.lcd::after{background:linear-gradient(180deg,rgba(255,235,180,.06),transparent 45%)}
.device{background:#050506!important;border:1px solid rgba(212,175,55,.35);box-shadow:0 0 0 1px rgba(0,0,0,.6),0 30px 70px -30px rgba(212,175,55,.35)}
.devkeys a{background:#17171B;border-bottom-color:#0B0B0D;color:#F1F1F3;box-shadow:inset 0 1px 0 rgba(255,255,255,.05)}
.devkeys a:hover{color:#F7E09A}
.devkeys a.eq{background:var(--gold-grad);border-bottom-color:#8A6A1A;color:#141008}
.devkeys a.eq small{color:rgba(20,16,8,.75)}
.btn.primary{background:var(--gold-grad);border-color:#B8902C;border-bottom-color:var(--key-2);color:var(--on-key);box-shadow:0 8px 24px -10px rgba(212,175,55,.6)}
.sci-keys .eq{background:var(--gold-grad);border-color:#B8902C;border-bottom-color:var(--key-2)}
.feat a:first-child{background:linear-gradient(150deg,#211C10,#0E0D0A 70%);color:var(--ink);border-color:rgba(212,175,55,.45)}
:root[data-theme="light"] .feat a:first-child{color:#F3F3F5}
.feat a:first-child p{color:#C9C3B2}
.feat a:first-child .big{color:#F3D27A;text-shadow:var(--glow)}
.panel,.pad,.calc-card,.feat a,.post-row,.blog-card,.aff-card{box-shadow:var(--shadow)}
.pad{background:linear-gradient(180deg,color-mix(in srgb,var(--cat) 7%,var(--surface)),var(--surface) 40%)}
.key{background:var(--surface-2);border-color:var(--line)}
.key:hover{color:var(--brand-2)}
:root[data-theme="light"] .key:hover{color:var(--brand)}
.rank.num a::before{color:var(--key)}
.formula{background:var(--surface-2)}
.calc-head h1,.cat-hero h1{letter-spacing:-.025em}

/* ---- neon layer ---- */
body{background:radial-gradient(900px 520px at 85% -10%,rgba(124,77,255,.35),transparent 60%),radial-gradient(700px 420px at 10% 5%,rgba(0,229,255,.18),transparent 60%),radial-gradient(800px 500px at 50% 110%,rgba(255,61,203,.14),transparent 60%),var(--bg);background-attachment:fixed}
:root[data-theme="light"] body{background:radial-gradient(900px 520px at 85% -10%,rgba(124,77,255,.18),transparent 60%),radial-gradient(700px 420px at 10% 5%,rgba(0,229,255,.14),transparent 60%),var(--bg)}
.site-header{border-bottom:1px solid transparent;border-image:var(--grad) 1}
.hero h1{background:linear-gradient(95deg,#FFFFFF 0%,#A5F3FF 38%,#B9A4FF 68%,#FF8BE0 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
:root[data-theme="light"] .hero h1{background:linear-gradient(95deg,#14122E 0%,#5B3FD9 55%,#D6249E 100%);-webkit-background-clip:text;background-clip:text}
.device{border:1.5px solid transparent!important;background:linear-gradient(#06051A,#06051A) padding-box,var(--grad) border-box!important;box-shadow:0 0 70px -12px rgba(124,77,255,.6),0 0 30px -10px rgba(0,229,255,.4)}
.device .lcd:focus-within{box-shadow:inset 0 0 0 2px var(--key),0 0 24px -4px var(--key)}
.devkeys a{background:#151242;border-bottom-color:#0A0826;color:#F6F5FF}
.devkeys a:hover{box-shadow:0 0 0 1px var(--key),0 0 18px -4px var(--key);color:#fff}
.devkeys a.eq{background:var(--btn-grad);border-bottom-color:#4B2FD9;color:#fff}
.devkeys a.eq small{color:rgba(255,255,255,.85)}
.btn.primary{background:var(--btn-grad);border:0;border-bottom:3px solid #3F27B0;color:#fff;box-shadow:0 10px 30px -8px rgba(164,61,255,.75)}
.sci-keys .eq{background:var(--btn-grad);border-color:transparent;border-bottom-color:#3F27B0;color:#fff}
.lcd{box-shadow:inset 0 0 0 1px var(--lcd-line),inset 0 14px 34px rgba(0,0,0,.55),0 0 0 0 transparent}
.lcd::after{background:linear-gradient(180deg,rgba(160,240,255,.07),transparent 45%)}
.result{border:1.5px solid transparent;background:linear-gradient(var(--surface),var(--surface)) padding-box,var(--grad) border-box;box-shadow:0 0 50px -20px rgba(124,77,255,.7)}
.feat a{background:linear-gradient(160deg,color-mix(in srgb,var(--cat) 24%,var(--surface)),var(--surface) 72%);border-color:color-mix(in srgb,var(--cat) 45%,var(--line))}
.feat a:hover{box-shadow:0 0 34px -8px var(--cat)}
.feat a:first-child{background:linear-gradient(145deg,#5B6CFF 0%,#8A3DFF 45%,#E0249E 100%);border:0;color:#fff}
.feat a:first-child p{color:rgba(255,255,255,.85)}
.feat a:first-child .tag{color:#fff;opacity:.9}
.feat a:first-child .big{color:#fff;text-shadow:0 0 24px rgba(255,255,255,.55)}
.feat .big{color:var(--cat);text-shadow:0 0 18px color-mix(in srgb,var(--cat) 60%,transparent)}
.pad{background:linear-gradient(180deg,color-mix(in srgb,var(--cat) 20%,var(--surface)),var(--surface) 55%);box-shadow:0 0 50px -24px var(--cat)}
.pad .key:hover,.keys-flow .key:hover{border-color:var(--cat,var(--key));box-shadow:0 0 16px -4px var(--cat,var(--key));color:var(--ink)}
.calc-card{background:linear-gradient(160deg,color-mix(in srgb,var(--cat) 14%,var(--surface)),var(--surface) 70%);border-color:color-mix(in srgb,var(--cat) 30%,var(--line))}
.calc-card:hover{box-shadow:0 0 26px -8px var(--cat);border-color:var(--cat)}
.calc-head{border-left:5px solid var(--cat)}
.post-row:hover,.blog-card:hover{box-shadow:0 0 26px -8px var(--cat)}
.rank.num a::before{color:var(--key);text-shadow:0 0 10px var(--key)}
.dot{box-shadow:0 0 8px var(--cat)}
.ad{border-color:color-mix(in srgb,var(--line) 70%,transparent);opacity:.75}
.nav a[aria-current="page"]{background:color-mix(in srgb,var(--key) 14%,transparent);color:var(--ink);box-shadow:inset 0 -2px 0 var(--key)}
.faq summary::after{color:var(--key)}

/* Ads are hidden until AdSense approval. To show them, change data-ads="off" to data-ads="on" on the <html> tag. */
html[data-ads="off"] .ad,html[data-ads="off"] .sticky-ad,html[data-ads="off"] .aff{display:none!important}
.page-grid>*,.two>*,.edu>*,.pads>*,.hero>*{min-width:0}
.callout{background:color-mix(in srgb,var(--con) 12%,var(--surface));border:1px solid color-mix(in srgb,var(--con) 40%,var(--line));border-left:4px solid var(--con);padding:12px 16px;border-radius:var(--r-sm)}
.qconv{margin-bottom:22px}
.qconv .form-grid{grid-template-columns:repeat(auto-fill,minmax(165px,1fr))}
.fade-in{animation:fi .35s ease-out}
@keyframes fi{from{opacity:.001;transform:translateY(4px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}