/* Ssstikio design system v1 — tokens, components, layout. No external fonts. */
:root{
  --bg:#F5F8F7;--surface:#FFFFFF;--surface-2:#EDF2F1;--ink:#0D1917;--muted:#4A5B57;--line:#D9E2E0;--line-strong:#B6C5C2;
  --brand:#00C2A8;--brand-strong:#00A690;--on-brand:#03231F;--brand-tint:#DDF6F1;--brand-deep:#006B5E;
  --link:#00786A;--focus:#00786A;
  --ok:#16703F;--ok-bg:#E1F4E9;--err:#B3261E;--err-bg:#FCEAE8;--warn:#8A5700;--warn-bg:#FFF2D6;
  --radius:14px;--shadow:0 1px 2px rgb(0 0 0/.04),0 12px 32px -16px rgb(0 50 42/.22);
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:light
}
[data-theme=dark]{
  --bg:#0A100F;--surface:#111A18;--surface-2:#18231F;--ink:#E7F0EE;--muted:#9FB2AE;--line:#22302D;--line-strong:#34453F;
  --brand:#19D3B9;--brand-strong:#45E2CB;--on-brand:#02201C;--brand-tint:#0F2B26;--brand-deep:#6FEAD6;
  --link:#55E4CF;--focus:#55E4CF;
  --ok:#6BD99D;--ok-bg:#10281B;--err:#FF8F85;--err-bg:#2E1513;--warn:#F2C35B;--warn-bg:#2B2210;
  --shadow:0 1px 2px rgb(0 0 0/.3),0 12px 32px -16px rgb(0 0 0/.6);
  color-scheme:dark
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-padding-top:88px}
body{margin:0;font-family:var(--font);font-size:1rem;line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:var(--link);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--ink)}
h1,h2,h3{line-height:1.18;margin:0 0 .5em;font-weight:700;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(1.95rem,1.2rem + 3.2vw,3.25rem);letter-spacing:-.035em}
h2{font-size:clamp(1.4rem,1.1rem + 1.2vw,1.95rem)}
h3{font-size:1.08rem;letter-spacing:-.01em}
p{margin:0 0 1em;text-wrap:pretty}
ul,ol{margin:0 0 1em}
code{font-family:var(--mono);font-size:.9em;background:var(--surface-2);padding:.1em .35em;border-radius:5px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:12px;top:-80px;z-index:200;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-weight:700}
.skip:focus{top:12px;color:var(--bg)}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}
.narrow{max-width:780px}
.muted{color:var(--muted)}

/* Header */
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in oklab,var(--bg) 88%,transparent);-webkit-backdrop-filter:saturate(1.4) blur(12px);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.hdr-in{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:4px 20px;min-height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;font-size:1.22rem;letter-spacing:-.035em}
.logo:hover{color:var(--ink)}
.logo svg{width:32px;height:32px}
.nav{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{padding:8px 13px;border-radius:999px;color:var(--muted);text-decoration:none;font-size:.95rem;white-space:nowrap}
.nav a:hover{color:var(--ink);background:var(--surface-2)}
.nav a[aria-current=page]{color:var(--ink);background:var(--surface-2);font-weight:700}
.hdr-act{display:flex;gap:8px;align-items:center;justify-self:end}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:var(--surface)}
.lang a{min-width:40px;height:34px;display:grid;place-items:center;border-radius:999px;font-size:.8rem;font-weight:700;color:var(--muted);text-decoration:none}
.lang a:hover{color:var(--ink)}
.lang a[aria-current]{background:var(--ink);color:var(--bg)}
.icon-btn{width:42px;height:42px;display:grid;place-items:center;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;padding:0}
.icon-btn:hover{border-color:var(--line-strong)}
.icon-btn .ic{width:20px;height:20px}
.i-sun{display:none}[data-theme=dark] .i-sun{display:block}[data-theme=dark] .i-moon{display:none}
@media (max-width:759px){
  .hdr-in{grid-template-columns:1fr auto}
  .nav{grid-column:1/-1;order:3;margin:0 -20px;padding:0 14px 8px}
}

/* Hero + tool */
.hero{padding:44px 0 28px;text-align:center}
.hero h1{max-width:900px;margin-inline:auto}
.lead{font-size:1.1rem;color:var(--muted);max-width:680px}
.hero .lead{margin:0 auto 26px}
.tool{max-width:780px;margin:0 auto;text-align:left}
.tool-form{display:grid;gap:10px;padding:10px;background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
@media (min-width:640px){.tool-form{grid-template-columns:minmax(0,1fr) auto}}
.field{position:relative;display:flex;align-items:center;background:var(--surface-2);border-radius:14px;border:2px solid transparent;min-height:60px}
.field:focus-within{border-color:var(--brand);background:var(--surface)}
.field-ic{position:absolute;left:16px;color:var(--muted);width:20px;height:20px;pointer-events:none}
.field input{flex:1;min-width:0;height:56px;border:0;background:transparent;font:inherit;font-size:1.05rem;color:var(--ink);padding:0 8px 0 46px;outline:none}
.field input::placeholder{color:var(--muted);opacity:1}
.btn-paste{margin-right:6px}
.tool-note{text-align:center;font-size:.85rem;color:var(--muted);margin:10px 0 0}
.trust{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-wrap:wrap;justify-content:center;gap:6px 16px;color:var(--muted);font-size:.9rem}
.trust li{display:flex;gap:6px;align-items:center}
.trust .ic{width:16px;height:16px;color:var(--brand-deep)}
.out{margin-top:16px}
.out:empty{display:none}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:12px;border:1px solid transparent;font:inherit;font-weight:700;font-size:.98rem;line-height:1.2;cursor:pointer;text-decoration:none;transition:background-color .15s,border-color .15s,transform .1s;-webkit-tap-highlight-color:transparent}
.btn:active{transform:translateY(1px)}
.btn .ic{width:20px;height:20px;flex:none}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn-primary{background:var(--brand);color:var(--on-brand)}
.btn-primary:hover{background:var(--brand-strong);color:var(--on-brand)}
.btn-secondary{background:var(--surface);color:var(--ink);border-color:var(--line-strong)}
.btn-secondary:hover{border-color:var(--ink);color:var(--ink)}
.btn-soft{background:var(--surface);color:var(--ink);border-color:var(--line);padding:0 14px}
.btn-soft:hover{border-color:var(--line-strong)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--surface-2)}
.btn-xl{min-height:60px;padding:0 28px;font-size:1.08rem;border-radius:14px}
.btn small{font-weight:400;font-size:.8rem;opacity:.85}

/* Card / result */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.result{display:grid;gap:16px 20px;grid-template-columns:100px minmax(0,1fr);align-items:start}
@media (min-width:640px){.result{grid-template-columns:150px minmax(0,1fr)}}
.thumb,.ph{background:repeating-linear-gradient(135deg,var(--surface-2) 0 8px,var(--bg) 8px 16px);border:1px solid var(--line);display:grid;place-items:center;font:500 .66rem/1.3 var(--mono);color:var(--muted);text-align:center;padding:6px}
.thumb{aspect-ratio:9/16;border-radius:10px;position:relative}
.thumb:has(img),.ph:has(img),.avatar:has(img){padding:0;overflow:hidden}
.thumb img,.ph img,.avatar img{width:100%;height:100%;object-fit:cover;display:block}
.thumb .dur{position:absolute;right:6px;bottom:6px;background:rgb(0 0 0/.75);color:#fff;border-radius:6px;padding:1px 6px;font:700 .72rem var(--font)}
.author{display:flex;gap:10px;align-items:center;font-weight:700;line-height:1.25}
.avatar{width:38px;height:38px;border-radius:50%;flex:none;background:var(--brand-tint);color:var(--brand-deep);display:grid;place-items:center;font-weight:700}
.handle{display:block;color:var(--muted);font-weight:400;font-size:.88rem}
.caption{margin:10px 0 12px;font-size:.95rem}
.badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:4px}
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:700;background:var(--surface-2);color:var(--ink)}
.badge-ok{background:var(--ok-bg);color:var(--ok)}
.badge-brand{background:var(--brand-tint);color:var(--brand-deep)}
.dl-list{display:grid;gap:8px;grid-column:1/-1}
@media (min-width:640px){.dl-list,.photos{grid-column:2}}
.dl-list .btn{justify-content:space-between;width:100%;min-height:54px;text-align:left}
.dl-list .btn span{display:flex;align-items:center;gap:10px}
.photos{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;grid-column:1/-1}
.photos .ph{aspect-ratio:3/4;border-radius:8px}
.result-foot{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;align-items:center;font-size:.85rem;color:var(--muted);border-top:1px solid var(--line);padding-top:12px}
.sk{background:linear-gradient(90deg,var(--surface-2) 25%,var(--line) 50%,var(--surface-2) 75%);background-size:200% 100%;animation:sk 1.2s linear infinite;border-radius:8px}
@keyframes sk{to{background-position:-200% 0}}
.sk-line{height:14px;margin-bottom:10px}
.progress{height:6px;background:var(--surface-2);border-radius:999px;overflow:hidden;margin:14px 0 8px;grid-column:1/-1}
.progress i{display:block;height:100%;width:6%;background:var(--brand);border-radius:inherit;transition:width .5s ease}
.load-text{grid-column:1/-1;font-size:.9rem;color:var(--muted);margin:0}
.alert{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;border-color:var(--err);background:var(--err-bg)}
.alert>.ic{width:26px;height:26px;color:var(--err)}
.alert.warn{border-color:var(--warn);background:var(--warn-bg)}
.alert.warn>.ic{color:var(--warn)}
.alert h3{margin:.1em 0 .35em}
.alert p{margin:0 0 .6em}
.alert ul{margin:0 0 14px;padding-left:1.1em;font-size:.93rem}

/* Ads — sizes reserved to prevent layout shift */
.ad{display:grid;place-items:center;margin:20px auto;border:1px dashed var(--line-strong);border-radius:12px;background:repeating-linear-gradient(45deg,transparent 0 10px,var(--surface-2) 10px 20px);color:var(--muted);font:700 .68rem/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;overflow:hidden}
.ad-result,.ad-content{width:100%;max-width:336px;height:280px}
@media (min-width:760px){.ad-result,.ad-content{max-width:728px;height:90px}}
.ad-side{width:300px;height:600px;display:none;margin:0}
@media (min-width:1024px){.ad-side{display:grid}}

/* Sections */
.block{padding:44px 0;border-top:1px solid var(--line)}
.block:first-child{border-top:0}
.block>h2{max-width:760px}
.answer{font-size:1.06rem;max-width:760px}
.block>p{max-width:760px}
.list{padding-left:1.2em;max-width:760px}
.list li{margin:.35em 0}
.eyebrow{font:700 .78rem var(--font);letter-spacing:.08em;text-transform:uppercase;color:var(--brand-deep);margin-bottom:8px}
.steps{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.steps li{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.step-n{width:36px;height:36px;border-radius:50%;background:var(--brand);color:var(--on-brand);display:grid;place-items:center;font-weight:700}
.steps h3{margin:.35em 0 .3em}
.steps p{margin:0;color:var(--muted)}
.steps.cols li{grid-template-columns:1fr}
@media (min-width:760px){.steps.cols{grid-template-columns:repeat(3,minmax(0,1fr))}}
.ill{height:112px;border-radius:10px;background:var(--brand-tint);display:grid;place-items:center;position:relative}
.ill .ic{width:44px;height:44px;color:var(--brand-deep);stroke-width:1.6}
.ill .step-n{position:absolute;left:12px;top:12px;width:30px;height:30px;font-size:.9rem}
.grid-3{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr))}
.feat h3{margin:14px 0 6px}
.feat p{margin:0;color:var(--muted);font-size:.96rem}
.ic-box{width:44px;height:44px;border-radius:12px;background:var(--brand-tint);color:var(--brand-deep);display:grid;place-items:center}
.ic-box .ic{width:22px;height:22px}
.define{background:var(--brand-tint);border:1px solid color-mix(in oklab,var(--brand) 35%,transparent);border-radius:20px;padding:28px}
.define p{font-size:1.14rem;margin:0;max-width:760px}

/* Table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin:8px 0 0}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:540px}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--surface-2);font-size:.85rem}
tbody th{font-weight:700}
tbody tr:last-child>*{border-bottom:0}
.hl{background:color-mix(in oklab,var(--brand-tint) 70%,transparent)}
thead .hl{background:var(--brand-tint);color:var(--brand-deep)}

/* Accordion */
.acc{display:grid;gap:8px;max-width:820px}
.acc details{background:var(--surface);border:1px solid var(--line);border-radius:12px}
.acc details[open]{border-color:var(--line-strong)}
.acc summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:16px;align-items:center;padding:14px 18px;min-height:56px;border-radius:12px}
.acc summary::-webkit-details-marker{display:none}
.acc summary h3{margin:0;font-size:1rem}
.acc summary::after{content:"";width:9px;height:9px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .2s;flex:none;margin-top:-4px}
.acc details[open] summary::after{transform:rotate(-135deg);margin-top:4px}
.acc-body{padding:0 18px 16px;color:var(--muted)}
.acc-body p{margin:0}

/* Tabs */
.tablist{display:inline-flex;flex-wrap:wrap;gap:4px;padding:4px;background:var(--surface-2);border-radius:12px;margin-bottom:14px}
.tab{font:inherit;font-weight:700;border:0;background:transparent;padding:0 16px;min-height:44px;border-radius:9px;color:var(--muted);cursor:pointer;display:flex;gap:8px;align-items:center}
.tab .ic{width:18px;height:18px}
.tab[aria-selected=true]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgb(0 0 0/.12)}
.tabpanel ol{margin:0 0 14px;padding-left:1.2em}
.tabpanel li{margin:.3em 0}

/* Toast + hint */
.toasts{position:fixed;left:50%;bottom:calc(16px + env(safe-area-inset-bottom));transform:translateX(-50%);display:grid;gap:8px;z-index:100;width:min(92vw,440px);pointer-events:none}
.toast{background:var(--ink);color:var(--bg);padding:12px 16px;border-radius:12px;font-size:.93rem;box-shadow:var(--shadow);opacity:0;transform:translateY(8px);transition:opacity .25s,transform .25s;display:flex;gap:10px;align-items:center}
.toast.in{opacity:1;transform:none}
.toast::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--muted);flex:none}
.toast-success::before{background:var(--brand)}
.toast-error::before{background:#FF6B5E}
.hint{position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));z-index:90;max-width:460px;margin:0 auto;display:flex;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line-strong);border-radius:16px;padding:12px 12px 12px 16px;box-shadow:var(--shadow);font-size:.92rem}
.hint[hidden]{display:none}
.hint p{margin:0;flex:1}
.hint .icon-btn{width:40px;height:40px;flex:none}

/* Breadcrumbs, page hero, meta */
.crumbs{padding-top:18px;font-size:.87rem}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px}
.crumbs li+li::before{content:"/";margin-right:4px;color:var(--line-strong)}
.crumbs a{color:var(--muted)}
.crumbs [aria-current]{color:var(--ink)}
.page-hero{padding:26px 0 30px}
.page-hero .lead{margin-bottom:0}
.meta-line{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:.88rem;color:var(--muted);margin-top:16px}
.hero .meta-line{justify-content:center}

/* Article layout */
.layout{display:grid;gap:40px;align-items:start}
@media (min-width:1024px){.layout{grid-template-columns:minmax(0,1fr) 300px}}
.aside{display:none}
@media (min-width:1024px){.aside{display:grid;gap:20px;position:sticky;top:84px}}
.toc{font-size:.92rem}
.toc h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.toc ol{margin:0;padding-left:1.1em;display:grid;gap:6px}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--link);text-decoration:underline}
.author-box{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:start;margin:8px 0}
.author-box svg{width:44px;height:44px}
.author-box p{margin:0;font-size:.93rem;color:var(--muted)}
.author-box strong{display:block;color:var(--ink)}

/* Cards: posts, related */
.post{padding:0;overflow:hidden;display:flex;flex-direction:column}
.post .ph{aspect-ratio:16/9;border:0;border-bottom:1px solid var(--line)}
.post-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1}
.post h3{margin:0;font-size:1.05rem}
.post h3 a{color:var(--ink);text-decoration:none}
.post h3 a:hover{text-decoration:underline}
.post p{margin:0;color:var(--muted);font-size:.93rem}
.post small{color:var(--muted);margin-top:auto}
.rel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr));gap:8px}
.rel-card{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 16px;min-height:54px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);text-decoration:none;font-weight:700}
.rel-card:hover{border-color:var(--brand);color:var(--ink)}
.rel-card .ic{width:18px;height:18px;color:var(--muted)}

/* Forms */
.form{display:grid;gap:14px;max-width:620px}
.form label{font-weight:700;font-size:.9rem;display:grid;gap:6px}
.input{min-height:48px;padding:10px 14px;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface);color:var(--ink);font:inherit;font-weight:400;width:100%}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in oklab,var(--brand) 25%,transparent)}
textarea.input{min-height:140px;resize:vertical}

/* Footer */
.ftr{margin-top:56px;border-top:1px solid var(--line);background:var(--surface);padding:44px 0 28px;font-size:.92rem}
.ftr-grid{display:grid;gap:28px;grid-template-columns:repeat(2,minmax(0,1fr))}
.ftr-brand{grid-column:1/-1}
@media (min-width:900px){.ftr-grid{grid-template-columns:1.7fr repeat(5,minmax(0,1fr))}.ftr-brand{grid-column:auto}}
.ftr-brand p{color:var(--muted);margin:12px 0 0;max-width:280px}
.ftr h2{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:12px}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ftr a{color:var(--ink);text-decoration:none}
.ftr a:hover{text-decoration:underline}
.ftr-bottom{margin-top:32px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;color:var(--muted);font-size:.85rem}
.ftr-bottom p{margin:0}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}