@font-face{font-family:"Unbounded";src:url(/static/fonts/unbounded-700.woff) format("woff");font-weight:700;font-display:swap}
@font-face{font-family:"Be Vietnam Pro";src:url(/static/fonts/bevietnam-400.woff) format("woff");font-weight:400;font-display:swap}
@font-face{font-family:"Be Vietnam Pro";src:url(/static/fonts/bevietnam-700.woff) format("woff");font-weight:700;font-display:swap}

:root{
  --paper:#F4F6F9; --sheet:#FFFFFF; --ink:#16202E; --muted:#556072; --rule:#D6DCE5;
  --mark:#FFE24A; --mark-ink:#16202E; --link:#1C4ED8; --ok:#0F7B5F; --warn:#B4361F;
  --t-phones:#2563EB; --t-computers:#0F7B5F; --t-home:#8A5A00; --t-money:#B4361F; --t-mindset:#6D3FC0; --t-germany:#C2185B; --t-countries:#0E6E8C; --t-pdf:#D14B0F;
  --display:"Unbounded",system-ui,sans-serif; --body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --measure:66ch; --r:6px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --paper:#10151D; --sheet:#171E29; --ink:#E9EDF3; --muted:#A3AEBE; --rule:#2B3442; --link:#8DB0FF; --mark:#F5D42E; --mark-ink:#10151D;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1.0625rem/1.65 var(--body)}
a{color:var(--link);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--link);outline-offset:2px;border-radius:2px}
img,svg{max-width:100%;height:auto}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--sheet);padding:8px 12px;z-index:9}

/* header */
.top{border-bottom:1px solid var(--rule);background:var(--sheet)}
.top .wrap{display:flex;align-items:center;gap:24px;min-height:64px;flex-wrap:wrap}
.logo{font:700 1.05rem/1 var(--display);color:var(--ink);text-decoration:none;letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.logo i{display:inline-block;width:22px;height:22px;border-radius:50%;background:var(--mark);box-shadow:inset 0 0 0 2px var(--ink)}
.nav{display:flex;gap:18px;flex-wrap:wrap;margin-left:auto}
.nav a{color:var(--ink);text-decoration:none;font-weight:700;font-size:.95rem;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current]{border-color:var(--ink)}

/* type */
h1,h2,h3{line-height:1.15;margin:0 0 .5em}
h1{font:700 clamp(1.7rem,4.2vw,2.75rem)/1.12 var(--display);letter-spacing:-.02em;max-width:24ch}
h2{font:700 1.35rem/1.25 var(--display);letter-spacing:-.01em;margin-top:1.8em}
h3{font-size:1.1rem;font-weight:700}
p{margin:0 0 1em}
.lede{font-size:1.2rem;color:var(--muted);max-width:var(--measure)}
.muted{color:var(--muted)}
small,.small{font-size:.875rem}

/* home hero */
.hero{padding:56px 0 36px}
.hero h1{font-size:clamp(2.2rem,6vw,4.25rem);max-width:none}
.ask{display:flex;align-items:stretch;max-width:720px;margin-top:28px;border:2px solid var(--ink);border-radius:var(--r);background:var(--sheet)}
.ask label{font:700 1.15rem/1 var(--display);padding:0 4px 0 18px;display:flex;align-items:center;white-space:nowrap}
.ask input{flex:1;min-width:0;border:0;background:transparent;font:400 1.15rem var(--body);color:var(--ink);padding:16px 14px}
.ask input:focus{outline:none}
.ask:focus-within{box-shadow:0 0 0 3px var(--link)}
.results{max-width:720px;margin:10px 0 0;padding:0;list-style:none}
.results li a{display:block;padding:10px 14px;border-bottom:1px solid var(--rule);text-decoration:none;color:var(--ink)}
.results li a:hover{background:var(--sheet)}
.results .none{padding:10px 14px;color:var(--muted)}

/* shelves */
.shelf{padding:28px 0;border-top:1px solid var(--rule)}
.shelf-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:10px}
.shelf-head h2{margin:0}
.swatch{display:inline-block;width:12px;height:12px;border-radius:2px;margin-right:10px;vertical-align:middle;background:var(--c,var(--ink))}
.rows{list-style:none;margin:0;padding:0;columns:2 420px;column-gap:40px}
.rows li{break-inside:avoid;border-bottom:1px solid var(--rule)}
.rows a{display:flex;justify-content:space-between;gap:16px;padding:11px 0;color:var(--ink);text-decoration:none}
.rows a:hover span:first-child{text-decoration:underline}
.rows .meta{color:var(--muted);font-size:.875rem;white-space:nowrap}

.toolgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-top:8px}
.tool{display:block;padding:16px;border:1px solid var(--rule);border-radius:var(--r);background:var(--sheet);color:var(--ink);text-decoration:none}
.tool:hover{border-color:var(--ink)}
.tool b{display:block;font-size:1.02rem}
.tool span{color:var(--muted);font-size:.9rem}
.tool.big{grid-column:span 2}
@media (max-width:560px){.tool.big{grid-column:auto}}

/* article */
.crumbs{font-size:.9rem;color:var(--muted);padding:22px 0 8px}
.crumbs a{color:var(--muted)}
.article{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;padding-bottom:64px}
@media (max-width:900px){.article{grid-template-columns:1fr;gap:24px}}
.prose{max-width:var(--measure)}
.answer{background:var(--mark);color:var(--mark-ink);padding:18px 20px;border-radius:var(--r);margin:22px 0 28px}
.answer b{display:block;margin-bottom:4px}
.answer p{margin:0}
.steps{list-style:none;margin:0;padding:0;counter-reset:s}
.steps>li{counter-increment:s;position:relative;padding:18px 0 18px 64px;border-top:1px solid var(--rule)}
.steps>li::before{content:counter(s);position:absolute;left:0;top:16px;font:700 1.35rem/1 var(--display);width:44px;height:44px;display:grid;place-items:center;border:2px solid var(--ink);border-radius:50%}
.steps h3{margin:6px 0 6px;font-size:1.15rem}
.steps label.done{display:inline-flex;gap:8px;align-items:center;font-size:.9rem;color:var(--muted);cursor:pointer;margin-top:4px}
.steps input[type=checkbox]{width:18px;height:18px;accent-color:var(--ink)}
.steps li.is-done::before{background:var(--mark);color:var(--mark-ink)}
.steps li.is-done h3{text-decoration:line-through;text-decoration-thickness:2px;text-decoration-color:var(--mark)}
.recap{border-left:4px solid var(--ink);padding:4px 0 4px 18px;margin:28px 0}
.sources{font-size:.9rem;color:var(--muted);border-top:1px solid var(--rule);padding-top:14px;margin-top:32px}
.side{position:relative}
.side .stick{position:sticky;top:20px;display:grid;gap:18px}
.video{border:1px solid var(--rule);border-radius:var(--r);overflow:hidden;background:var(--sheet)}
.video .frame{aspect-ratio:16/9;background:#0f141c;display:grid;place-items:center;position:relative}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video button{font:700 1rem var(--body);border:0;border-radius:999px;padding:12px 20px;background:var(--mark);color:var(--mark-ink);cursor:pointer;display:flex;gap:8px;align-items:center}
.video .cap{padding:10px 14px;font-size:.85rem;color:var(--muted)}
.video .soon{color:#cfd6e2;padding:20px;text-align:center;font-size:.95rem}
.box{border:1px solid var(--rule);border-radius:var(--r);background:var(--sheet);padding:16px}
.box h2{font-size:1rem;margin:0 0 8px;font-family:var(--body)}
.box ul{margin:0;padding-left:18px}
.box li{margin:6px 0}

/* screen diagrams */
.screens{display:flex;gap:16px;overflow-x:auto;padding:8px 2px 14px;margin:6px 0 4px;scroll-snap-type:x mandatory}
.screens figure{margin:0;flex:0 0 190px;scroll-snap-align:start}
.screens figcaption{font-size:.82rem;color:var(--muted);margin-top:6px}

/* tools */
.toolpage{padding-bottom:64px;max-width:860px}
.panel{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r);padding:22px;margin:20px 0}
.drop{border:2px dashed var(--muted);border-radius:var(--r);padding:34px 18px;text-align:center;cursor:pointer;background:var(--paper)}
.drop.over{border-color:var(--link);background:var(--sheet)}
.drop b{font-size:1.1rem}
.btn{font:700 1rem var(--body);border:2px solid var(--ink);background:var(--ink);color:var(--sheet);border-radius:var(--r);padding:11px 18px;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:14px}
.field{display:grid;gap:6px;margin:12px 0}
.field label{font-weight:700;font-size:.95rem}
.field input,.field select{font:400 1.05rem var(--body);padding:10px 12px;border:1px solid var(--muted);border-radius:var(--r);background:var(--paper);color:var(--ink);max-width:320px}
.files{list-style:none;padding:0;margin:14px 0 0}
.files li{display:flex;gap:10px;align-items:center;padding:8px 10px;border:1px solid var(--rule);border-radius:var(--r);margin-bottom:6px;background:var(--paper)}
.files li span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.files button{border:1px solid var(--rule);background:var(--sheet);color:var(--ink);border-radius:4px;padding:2px 9px;cursor:pointer}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:12px;margin-top:14px}
.thumbs .pg{border:2px solid var(--rule);border-radius:4px;padding:6px;background:#fff;text-align:center;font-size:.8rem;color:#333;cursor:pointer;position:relative}
.thumbs .pg canvas{width:100%;height:auto;display:block}
.thumbs .pg.sel{border-color:var(--warn)}
.thumbs .pg.sel::after{content:"✓";position:absolute;top:4px;right:6px;color:var(--warn);font-weight:700}
.status{margin-top:12px;font-size:.95rem}
.status.err{color:var(--warn)}
.result{font:700 1.6rem var(--display);margin:6px 0}
.bars{display:grid;gap:8px;margin-top:14px}
.bar{display:grid;grid-template-columns:110px 1fr 110px;gap:10px;align-items:center;font-size:.95rem}
.bar i{display:block;height:14px;border-radius:3px;background:var(--c)}
.privacy-note{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;color:var(--muted)}

/* footer */
.foot{border-top:1px solid var(--rule);background:var(--sheet);padding:28px 0;margin-top:40px;font-size:.92rem}
.foot .wrap{display:flex;gap:24px;flex-wrap:wrap;justify-content:space-between}
.foot nav{display:flex;gap:16px;flex-wrap:wrap}
.foot a{color:var(--muted)}
.prosepage{max-width:var(--measure);padding:10px 0 60px}
@media (prefers-reduced-motion:no-preference){.answer{animation:mark .7s ease-out both}@keyframes mark{from{background-size:0 100%}to{background-size:100% 100%}}}

/* ---- v2: tool-first home (cards + chips), tool headers, wikiHow-style steps ---- */
.hero{padding:56px 0 34px;text-align:center;background:linear-gradient(180deg,var(--sheet),var(--paper))}
.hero h1{margin:0 auto .35em;max-width:20ch;font-size:clamp(2rem,5.2vw,3.6rem)}
.hero .lede{margin:0 auto}
.hero.small{padding:40px 0 28px}
.hero .ask{margin:26px auto 0}
.hero .results{margin:10px auto 0;text-align:left}
.tools-home{padding:26px 20px 40px}
.chips{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:22px}
.chip{font:700 .95rem var(--body);padding:8px 16px;border-radius:999px;border:1.5px solid var(--rule);background:var(--sheet);color:var(--ink);cursor:pointer}
.chip.on{background:var(--ink);color:var(--sheet);border-color:var(--ink)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.card{display:flex;flex-direction:column;gap:8px;padding:20px 18px 18px;background:var(--sheet);border:1px solid var(--rule);border-radius:12px;color:var(--ink);text-decoration:none;position:relative;transition:transform .15s,box-shadow .15s,border-color .15s}
.card b{font-size:1.08rem;margin-top:6px}
.card span{color:var(--muted);font-size:.92rem;line-height:1.45}
.card:hover{border-color:var(--c);box-shadow:0 8px 24px -12px var(--c);transform:translateY(-2px)}
.card[hidden]{display:none}
.ic{display:block;flex:none;border-radius:10px}
.band{background:var(--sheet);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:44px 0}
.band h2{margin-top:0;font-size:1.7rem}
.topics{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px;margin:22px 0 8px}
.topic{display:flex;flex-direction:column;gap:6px;padding:16px;border-radius:12px;border:1px solid var(--rule);text-decoration:none;color:var(--ink);background:var(--paper)}
.topic:hover{border-color:var(--c)}
.topic span{color:var(--muted);font-size:.88rem}
.sub{margin:28px 0 12px;font-size:1.1rem}
.gcards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.gcard{display:flex;flex-direction:column;gap:8px;padding:16px 18px;border-radius:12px;border:1px solid var(--rule);border-top:4px solid var(--c);background:var(--paper);color:var(--ink);text-decoration:none}
.gcard:hover b{text-decoration:underline}
.gcard .tag{font-size:.8rem;font-weight:700;color:var(--c)}
.gcard .meta{color:var(--muted);font-size:.85rem;margin-top:auto}
.promise{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;padding:40px 20px}
.promise b{display:block;font-size:1.05rem;margin-bottom:4px}
.promise span{color:var(--muted)}
.toolhead{background:var(--sheet);border-bottom:1px solid var(--rule);text-align:center;padding:0 0 30px}
.toolhead .crumbs{text-align:left}
.toolhead .ic{margin:6px auto 14px}
.toolhead h1{margin:0 auto .3em;max-width:none}
.toolhead .lede{margin:0 auto}
.toolpage{max-width:900px}
.toolpage .drop{background:var(--sheet);border:2px dashed var(--rule);padding:38px 18px;border-radius:14px}
.toolpage .drop b{display:inline-block;background:var(--c);color:#fff;font-size:1.2rem;padding:16px 34px;border-radius:12px;box-shadow:0 10px 24px -12px var(--c);margin-bottom:10px}
.toolpage .drop.over{border-color:var(--c)}
.toolpage .btn:not(.ghost){background:var(--c);border-color:var(--c);color:#fff;font-size:1.05rem;padding:13px 26px;border-radius:10px}
.toolpage .panel{border-radius:14px}
/* wikiHow-style steps */
.steps>li{padding:22px 0 22px 0;border-top:1px solid var(--rule)}
.steps>li::before{position:static;display:inline-grid;margin-bottom:10px;background:var(--ink);color:var(--paper);border-color:var(--ink)}
.steps .shot{margin:4px 0 14px;border-radius:12px;overflow:hidden;border:1px solid var(--rule);background:#0f141c}
.steps .shot img{display:block;width:100%;height:auto}
.steps h3{font-size:1.3rem;margin:0 0 8px}
.steps h3::first-letter{text-transform:uppercase}
.lead{margin:0 0 22px;border-radius:12px;overflow:hidden;border:1px solid var(--rule)}
.lead img{display:block;width:100%;height:auto}

/* v3: real-screenshot steps */
.steps>li.hasphone{display:grid;grid-template-columns:230px 1fr;column-gap:28px;align-items:start}
.steps>li.hasphone::before{grid-column:2;justify-self:start}
.steps>li.hasphone>.phone{grid-column:1;grid-row:1 / span 6;margin:0}
.steps>li.hasphone>*:not(.phone){grid-column:2}
.steps .phone img{display:block;width:100%;height:auto;filter:drop-shadow(0 10px 22px rgba(22,32,46,.18))}
@media (max-width:640px){.steps>li.hasphone{display:block}.steps>li.hasphone>.phone{max-width:250px;margin:0 auto 16px}}
.steps>li.hasphone>.phone.diagram{max-width:200px}
.steps .phone svg{display:block;width:100%;height:auto}

/* v4: articles */
.news .kicker{font:700 .8rem/1 var(--display);letter-spacing:.08em;text-transform:uppercase;color:#2B5BD7;margin:0 0 10px}
.news .dek{font-size:1.2rem;line-height:1.5;color:var(--muted);margin:8px 0 14px}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:12px;overflow:hidden;margin:22px 0 28px}
.facts>div{background:var(--paper);padding:12px 16px}
.facts dt{font-size:.78rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.facts dd{margin:4px 0 0;font-weight:600}
.news h2{margin-top:36px}.news h3{margin-top:22px}
.gcard .dekc{color:var(--muted);font-size:.92rem;line-height:1.45}
.gcards.big{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.diagram{margin:22px 0;padding:18px 18px 12px;background:var(--paper);border:1px solid var(--rule);border-radius:12px}
.diagram svg{display:block;width:100%;height:auto;max-width:560px;margin:0 auto}
.diagram figcaption{font-size:.85rem;color:var(--muted);margin-top:10px;text-align:center}
.article>.prose{min-width:0}.screens{max-width:100%}
.faq{margin-top:36px}.faq details{border-top:1px solid var(--rule);padding:14px 0}.faq details:last-child{border-bottom:1px solid var(--rule)}
.faq summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";font:700 1.3rem/1 var(--display);color:var(--muted)}
.faq details[open] summary::after{content:"–"}.faq details p{margin:10px 0 0}

.tablewrap{overflow-x:auto;margin:18px 0}
table.cmp{border-collapse:collapse;width:100%;font-size:.95rem;min-width:460px}
table.cmp th,table.cmp td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
table.cmp thead th{font:700 .9rem/1.3 var(--display);border-bottom:2px solid var(--ink)}
table.cmp tbody th{font-weight:600;color:var(--muted);width:30%}

.steps>li.hasphone.wide{grid-template-columns:320px 1fr}
.steps>li.hasphone.wide>.phone.diagram{max-width:340px}
@media (max-width:820px){.steps>li.hasphone.wide{display:block}.steps>li.hasphone.wide>.phone{margin:0 0 16px}}

a.chip{text-decoration:none;color:var(--ink)}