/* ResizeMate — design system (ui-ux-pro-max rules: AA contrast, 8px scale,
   semantic tokens, light+dark, SVG icons, visible focus, reduced-motion). */

/* ---------- tokens ---------- */
/* Minimal black + gold accent (ui-ux-pro-max recommendation for minimal tools). */
:root{
  --bg:#fafafa; --surface:#ffffff; --card:#ffffff;
  --line:#e5e5e5; --line-strong:#d4d4d4;
  --ink:#171717; --muted:#525252; --faint:#8a8a8a;
  --brand:#A16207; --brand-2:#854d0e; --brand-weak:#fbf3e3; --brand-ink:#fff;
  --ok:#0e9f6e; --danger:#dc2626; --ring:rgba(161,98,7,.45);
  --shadow:0 1px 2px rgba(23,23,23,.06),0 10px 28px rgba(23,23,23,.08);
  --radius:14px; --radius-sm:10px; --maxw:960px;
  --check1:#ededed; --check2:#f7f7f7;
}
[data-theme="dark"]{
  --bg:#0d0d0d; --surface:#151515; --card:#1a1a1a;
  --line:#2a2a2a; --line-strong:#3a3a3a;
  --ink:#f5f5f5; --muted:#a3a3a3; --faint:#6e6e6e;
  --brand:#e0a82e; --brand-2:#c98f1f; --brand-weak:#241d0e; --brand-ink:#171717;
  --ok:#34d399; --danger:#f87171; --ring:rgba(224,168,46,.5);
  --shadow:0 1px 2px rgba(0,0,0,.5),0 14px 34px rgba(0,0,0,.45);
  --check1:#262626; --check2:#1a1a1a;
}

/* ---------- base ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:400 16px/1.65 "Plus Jakarta Sans",system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;font-feature-settings:"cv02","cv03","ss01";
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1{font-weight:800;letter-spacing:-.02em;font-size:clamp(1.9rem,4.5vw,2.6rem);line-height:1.12;margin:.5em 0 .25em}
h2{font-weight:700;letter-spacing:-.01em;font-size:1.4rem;margin:1.8em 0 .6em}
h3{font-weight:600;font-size:1.05rem;margin:.4em 0}
p{color:var(--muted)}
.lead{font-size:1.12rem;color:var(--muted);max-width:62ch;margin:.2em 0 0}
.muted{color:var(--muted)}
strong{color:var(--ink);font-weight:600}
.svg,.ic{width:24px;height:24px;flex:none}
.ic-xs{width:15px;height:15px;vertical-align:-2px;color:var(--ok)}
:where(a,button,input,[tabindex]):focus-visible{outline:3px solid var(--ring);outline-offset:2px;border-radius:8px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:var(--brand);color:#fff;padding:10px 14px;border-radius:10px;z-index:20}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:16px;min-height:62px}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:1.18rem;color:var(--ink);letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.brand-mark{width:26px;height:26px;color:var(--brand)}
.nav{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto;font-size:.93rem}
.nav a{color:var(--muted);padding:7px 11px;border-radius:9px;font-weight:500}
.nav a:hover{color:var(--ink);background:var(--brand-weak);text-decoration:none}
.nav a[aria-current=page]{color:var(--brand);background:var(--brand-weak);font-weight:600}
.theme-toggle{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;cursor:pointer;
  background:var(--surface);border:1px solid var(--line);color:var(--muted)}
.theme-toggle:hover{color:var(--ink);border-color:var(--line-strong)}
.ic-sun{display:none}.ic-moon{display:block}
[data-theme="dark"] .ic-sun{display:block}[data-theme="dark"] .ic-moon{display:none}

/* ---------- tool ---------- */
.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;margin:22px 0;box-shadow:var(--shadow)}
.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  min-height:188px;padding:26px;text-align:center;cursor:pointer;border-radius:var(--radius);
  border:2px dashed var(--line-strong);background:var(--surface);transition:border-color .18s,background .18s,transform .18s}
.dropzone:hover{border-color:var(--brand)}
.dropzone.over{border-color:var(--brand);background:var(--brand-weak);transform:scale(1.005)}
.dz-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:14px;background:var(--brand-weak);color:var(--brand)}
.dz-icon .ic{width:26px;height:26px}
.dz-text{font-size:1.02rem;color:var(--ink)}
.dz-sub{font-size:.86rem;color:var(--faint);display:inline-flex;align-items:center;gap:6px}

/* selected-image preview (shown immediately on pick) */
.selected{margin-top:16px}
.sel-card{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px}
.sel-thumb{width:84px;height:84px;object-fit:contain;border-radius:8px;border:1px solid var(--line);
  background-image:linear-gradient(45deg,var(--check1) 25%,transparent 25%),linear-gradient(-45deg,var(--check1) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,var(--check1) 75%),linear-gradient(-45deg,transparent 75%,var(--check1) 75%);
  background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;background-color:var(--check2)}
.sel-info{display:flex;flex-direction:column;gap:3px;min-width:0}
.sel-info strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sel-info .muted{font-size:.88rem;font-variant-numeric:tabular-nums}
.sel-count{margin:0 0 10px;font-weight:600;color:var(--ink)}
.sel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.sel-grid-item{margin:0;display:flex;flex-direction:column;gap:5px}
.sel-grid-item img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.sel-grid-item figcaption{font-size:.74rem;color:var(--faint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.controls{margin-top:18px;display:flex;flex-direction:column;gap:14px}
.ctl-row{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.ctl-row label{display:inline-flex;gap:8px;align-items:center;color:var(--muted);font-size:.92rem;font-weight:500}
.ctl-row .chk{gap:7px}
input[type=number]{width:96px;background:var(--surface);border:1px solid var(--line-strong);color:var(--ink);
  border-radius:9px;padding:9px 10px;font:inherit;font-variant-numeric:tabular-nums}
input[type=number]:focus{border-color:var(--brand)}
input[type=range]{accent-color:var(--brand);height:6px}
input[type=checkbox]{accent-color:var(--brand);width:17px;height:17px}
.actions{margin-top:4px;gap:10px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;font:inherit;font-weight:600;
  background:var(--surface);color:var(--ink);border:1px solid var(--line-strong);border-radius:var(--radius-sm);
  padding:11px 18px;transition:transform .12s,background .15s,border-color .15s}
.btn:hover{border-color:var(--brand);text-decoration:none}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.btn.primary:hover{background:var(--brand-2);border-color:var(--brand-2)}
.btn.small{padding:7px 13px;font-size:.85rem}
.btn:disabled{opacity:.55;cursor:wait}

.result{margin-top:18px;border-top:1px solid var(--line);padding-top:18px}
.preview img{max-width:100%;max-height:340px;border-radius:12px;border:1px solid var(--line);
  background-image:linear-gradient(45deg,var(--check1) 25%,transparent 25%),linear-gradient(-45deg,var(--check1) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,var(--check1) 75%),linear-gradient(-45deg,transparent 75%,var(--check1) 75%);
  background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0;background-color:var(--check2)}
.meta{margin-top:12px;display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.meta p{margin:0;font-variant-numeric:tabular-nums}
.hint{font-size:.82rem}
.ok-note{color:var(--ok);font-weight:600}
.warn-note{color:var(--danger);font-weight:600}
.bulk-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.bulk-status{color:var(--muted);font-size:.9rem;font-variant-numeric:tabular-nums}
.bulk-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.bulk-list li{display:flex;align-items:center;gap:12px;font-size:.9rem;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:9px 11px}
.bulk-thumb{width:46px;height:46px;flex:none;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.bulk-meta{flex:1;min-width:0;line-height:1.35}
.bulk-meta .muted{font-size:.82rem;font-variant-numeric:tabular-nums}
/* click-to-zoom affordance */
.preview img,.sel-thumb,.sel-grid-item img,.bulk-thumb{cursor:zoom-in}

/* lightbox */
.lightbox{position:fixed;inset:0;z-index:1000;display:none;place-items:center;padding:24px;
  background:rgba(0,0,0,.82)}
.lightbox.open{display:grid}
.lightbox img{max-width:92vw;max-height:86vh;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.5);
  background-image:linear-gradient(45deg,#888 25%,transparent 25%),linear-gradient(-45deg,#888 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#888 75%),linear-gradient(-45deg,transparent 75%,#888 75%);
  background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0;background-color:#aaa}
.lb-close{position:fixed;top:16px;right:22px;width:44px;height:44px;border:0;border-radius:50%;cursor:pointer;
  background:rgba(255,255,255,.12);color:#fff;font-size:1.7rem;line-height:1;display:grid;place-items:center}
.lb-close:hover{background:rgba(255,255,255,.22)}

/* ---------- content ---------- */
.howto{counter-reset:step;list-style:none;padding:0;margin:.5em 0}
.howto li{position:relative;padding:10px 0 10px 46px;color:var(--muted)}
.howto li::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:8px;
  width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.9rem}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:16px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.tool-card{display:block;transition:transform .14s,border-color .14s,box-shadow .14s}
.tool-card:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--shadow);text-decoration:none}
.tool-card h3{color:var(--ink)}
.ibadge{display:grid;place-items:center;width:42px;height:42px;border-radius:11px;background:var(--brand-weak);color:var(--brand);margin-bottom:10px}
.features .card{text-align:left}

table{width:100%;border-collapse:collapse;margin:12px 0;font-variant-numeric:tabular-nums}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}
th{color:var(--ink);font-weight:600}
td{color:var(--muted)}

.faq dt{font-weight:600;color:var(--ink);margin-top:18px}
.faq dd{margin:5px 0 0;color:var(--muted)}

.related{margin:34px auto}
.tool-links{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0}
.tool-links a{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:9px 15px;color:var(--ink);font-weight:500}
.tool-links a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}

.site-footer{border-top:1px solid var(--line);margin-top:48px;padding:30px 0;color:var(--faint);font-size:.9rem}
.footer-nav{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.footer-nav a{color:var(--muted)}

/* ---------- responsive ---------- */
@media(max-width:600px){
  .site-header .wrap{flex-wrap:wrap;gap:8px;padding:10px 20px}
  .nav{order:3;width:100%;margin:0;justify-content:flex-start;overflow-x:auto}
  .theme-toggle{margin-left:auto}
  h2{font-size:1.25rem}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}