:root{
  --bg:#f3f5f9; --surface:#fff; --ink:#121826; --muted:#5a6478; --line:#dde2ec;
  --accent:#2748e8; --accent-ink:#fff; --mark:#ffb703; --danger:#b3261e;
  --radius:10px; --max:1040px;
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e121b;--surface:#171c28;--ink:#eef1f7;--muted:#9aa4b8;--line:#2a3142;--accent:#6c88ff;--accent-ink:#0e121b;--danger:#ff8a80}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 var(--font)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--mark);outline-offset:2px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:8px 14px;z-index:99}
.skip:focus{left:8px;top:8px}

.site-header{background:var(--surface);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;letter-spacing:-.02em;color:var(--ink);text-decoration:none}
.brand-mark{width:26px;height:18px;border:3px solid var(--accent);border-radius:3px;position:relative}
.brand-mark:after{content:"";position:absolute;left:5px;top:1px;border-left:8px solid var(--mark);border-top:5px solid transparent;border-bottom:5px solid transparent}
.site-header nav{display:flex;gap:4px;flex-wrap:wrap}
.site-header nav a{padding:6px 12px;border-radius:999px;text-decoration:none;color:var(--muted);font-size:.95rem}
.site-header nav a:hover{color:var(--ink)}
.site-header nav a[aria-current]{background:var(--ink);color:var(--bg)}

h1,h2,h3{line-height:1.2;letter-spacing:-.02em;margin:0 0 .6em}
h1{font-size:clamp(1.9rem,4.5vw,2.9rem);font-weight:800}
h2{font-size:1.5rem;font-weight:750;margin-top:2.2em}
h3{font-size:1.15rem;font-weight:700;margin-top:1.6em}
p{margin:0 0 1.1em}
.hero{padding:44px 0 10px}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:62ch}

.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:22px 0}
.tool form{display:flex;gap:10px;flex-wrap:wrap}
input[type=url],input[type=text],input[type=email],textarea,select{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:12px 14px;width:100%}
.tool input[type=url]{flex:1 1 320px;width:auto}
.btn{font:inherit;font-weight:700;background:var(--accent);color:var(--accent-ink);border:0;border-radius:8px;padding:12px 22px;cursor:pointer;text-decoration:none;display:inline-block}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn[disabled]{opacity:.6;cursor:wait}
.hint{color:var(--muted);font-size:.9rem;margin:10px 0 0}
.msg{margin-top:14px;padding:10px 14px;border-radius:8px;background:rgba(179,38,30,.1);color:var(--danger);display:none}
.msg.show{display:block}

/* Results: contact-sheet style frames with crop marks */
.results{display:grid;gap:22px;margin-top:22px}
.frame{display:grid;gap:14px;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:center;padding:18px 0;border-top:1px dashed var(--line)}
.frame:first-child{border-top:0}
.shot{position:relative;background:#000;border-radius:2px}
.shot img{width:100%}
.shot:before,.shot:after{content:"";position:absolute;width:14px;height:14px;border:2px solid var(--mark);pointer-events:none}
.shot:before{left:-6px;top:-6px;border-right:0;border-bottom:0}
.shot:after{right:-6px;bottom:-6px;border-left:0;border-top:0}
.frame h3{margin:0 0 4px;font-size:1.05rem}
.frame .dim{color:var(--muted);margin:0 0 12px;font-size:.92rem}
.frame .actions{display:flex;gap:8px;flex-wrap:wrap}
.frame .btn{padding:9px 16px;font-size:.92rem}
@media (max-width:640px){.frame{grid-template-columns:1fr}}

table{border-collapse:collapse;width:100%;font-size:.95rem;background:var(--surface);border:1px solid var(--line)}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left}
th{background:var(--bg)}
.table-scroll{overflow-x:auto}

.prose{max-width:72ch}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin-bottom:.4em}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;padding-left:46px;position:relative;margin-bottom:14px}
.steps li:before{content:counter(s);position:absolute;left:0;top:-2px;width:32px;height:32px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-weight:700}
details{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin-bottom:10px}
summary{cursor:pointer;font-weight:650}
details[open] summary{margin-bottom:8px}

.cards{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));margin:18px 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--ink);display:block}
.card:hover{border-color:var(--accent)}
.card h3{margin:0 0 6px;font-size:1.1rem}
.card p{color:var(--muted);font-size:.95rem;margin:0}
.meta{color:var(--muted);font-size:.9rem}

.ad{margin:26px 0;text-align:center;min-height:90px}
.ad-label{display:block;font-size:.7rem;color:var(--muted);margin-bottom:4px}

/* resize tool */
.opts{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin:14px 0}
.opts label{display:block;font-weight:600;font-size:.92rem;margin-bottom:4px}
.opts input[type=color]{width:100%;height:44px;padding:2px;border:1px solid var(--line);border-radius:8px;background:var(--bg)}
.rz{display:grid;gap:18px;margin-top:18px}
.rz-item{border-top:1px dashed var(--line);padding-top:16px}
.rz-item canvas{width:100%;max-width:640px;height:auto;display:block;border-radius:2px;background:#000;margin:8px 0 12px}
.rz-head{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-weight:650}
.rz-head span:last-child{color:var(--muted);font-weight:500}

.form-row{margin-bottom:14px}
.form-row label{display:block;font-weight:600;margin-bottom:4px}
.hp{position:absolute;left:-5000px}
.notice{padding:12px 16px;border-radius:8px;margin-bottom:16px}
.notice.ok{background:rgba(30,140,70,.12)}
.notice.err{background:rgba(179,38,30,.1);color:var(--danger)}

.site-footer{margin-top:60px;border-top:1px solid var(--line);background:var(--surface);padding:26px 0;font-size:.92rem;color:var(--muted)}
.site-footer nav{display:flex;gap:6px 18px;flex-wrap:wrap;margin:10px 0}
.site-footer a{color:var(--ink)}
.foot-note{max-width:70ch;margin:0}
.copy{margin:8px 0 0}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.fmt-row{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:.92rem;color:var(--muted)}
.fmt-row select{width:auto;padding:6px 10px}
.zip-row{padding-top:6px;border-top:1px dashed var(--line)}
.lang-switch{font-size:.9rem}