/* =========================================================
   YouTube Thumbnail Downloader (.pk) — shared stylesheet
   Design: light "control-room" workspace, dark hero,
   single coral-red accent, mono type for pixel dimensions.
   ========================================================= */

:root {
  --ink:        #17141f;   /* near-black, plum-tinted */
  --ink-soft:   #2a2536;
  --paper:      #f4f2f7;   /* cool light background */
  --card:       #ffffff;
  --line:       #e3dfec;   /* hairlines */
  --muted:      #6b6580;   /* secondary text */
  --muted-2:    #928ca6;
  --accent:     #ff3d2e;   /* coral-red signature */
  --accent-ink: #c81e10;   /* darker red for hover/links */
  --accent-wash:#ffe9e6;
  --ok:         #159a67;
  --focus:      #2f6bff;

  --radius:     14px;
  --radius-sm:  9px;
  --shadow-sm:  0 1px 2px rgba(23,20,31,.06), 0 2px 8px rgba(23,20,31,.05);
  --shadow-md:  0 10px 30px rgba(23,20,31,.10);
  --maxw:       1120px;

  --f-display: "Space Grotesk", system-ui, sans-serif;
  --f-body:    "Inter", system-ui, -apple-system, sans-serif;
  --f-mono:    "Space Mono", ui-monospace, "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--f-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 22px; }

h1,h2,h3,h4 { font-family: var(--f-display); line-height: 1.12; font-weight: 700; letter-spacing: -0.01em; color: var(--ink); }
h1 { font-size: clamp(2rem, 4.4vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.15rem); margin: 0 0 .5em; }
h3 { font-size: 1.22rem; margin: 1.4em 0 .4em; }
p  { margin: 0 0 1.05em; }

.mono { font-family: var(--f-mono); }
.eyebrow {
  font-family: var(--f-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 .9rem;
  display: inline-block;
}

/* Skip link (a11y) */
.skip { position:absolute; left:-999px; top:0; background:var(--ink); color:#fff; padding:10px 16px; border-radius:0 0 8px 0; z-index:200; }
.skip:focus { left:0; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--f-display); font-weight: 700; font-size: 1.06rem; color: var(--ink); letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.brand svg { width: 34px; height: 34px; display:block; }
.brand small { display:block; font-family:var(--f-mono); font-weight:400; font-size:.6rem; letter-spacing:.14em; color:var(--muted); text-transform:uppercase; }
.brand .brand-name { display:flex; flex-direction:column; line-height:1.05; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  color: var(--ink); font-weight: 500; font-size: .95rem;
  padding: 8px 12px; border-radius: 8px; text-decoration: none;
}
.nav-links a:hover { background: var(--paper); text-decoration:none; }
.nav-links a.active { color: var(--accent-ink); }

.nav-toggle { display:none; background:none; border:1px solid var(--line); border-radius:9px; width:44px; height:40px; cursor:pointer; align-items:center; justify-content:center; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after { content:""; display:block; width:18px; height:2px; background:var(--ink); position:relative; transition:.2s; }
.nav-toggle span::before { position:absolute; top:-6px; }
.nav-toggle span::after  { position:absolute; top:6px; }

@media (max-width: 820px) {
  .nav-toggle { display:inline-flex; }
  .nav-links {
    position:absolute; top:68px; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:2px;
    background:#fff; border-bottom:1px solid var(--line);
    padding:10px 16px 16px; box-shadow:var(--shadow-md);
    display:none;
  }
  .nav-links.open { display:flex; }
  .nav-links a { padding:12px 10px; }
}

/* ---------- Hero + tool ---------- */
.hero {
  background: radial-gradient(120% 130% at 85% -10%, #322b46 0%, var(--ink) 55%);
  color: #fff; padding: 58px 0 46px;
  border-bottom: 1px solid #000;
}
.hero .eyebrow { color: #ff8f86; }
.hero h1 { color: #fff; max-width: 15ch; }
.hero .lede { color: #cfc9df; font-size: 1.08rem; max-width: 54ch; margin-top: .4rem; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
@media (max-width: 900px){ .hero-grid { grid-template-columns:1fr; gap:30px; } }

/* Resolution-ladder signature graphic */
.ladder { display:grid; gap:10px; }
.ladder .frame {
  position:relative; border:1.5px solid rgba(255,255,255,.28);
  border-radius:8px; background:rgba(255,255,255,.04);
  display:flex; align-items:flex-end; justify-content:space-between;
  padding:8px 10px; color:#dcd6ec;
}
.ladder .frame .tag { font-family:var(--f-mono); font-size:.72rem; letter-spacing:.04em; }
.ladder .frame .tag b { color:#fff; font-weight:700; }
.ladder .frame::before {
  content:""; position:absolute; top:8px; left:10px; width:26px; height:26px;
  border-radius:50%; border:2px solid var(--accent);
  background: radial-gradient(circle at 60% 50%, transparent 6px, transparent 6px);
}
.ladder .frame .play { position:absolute; top:15px; left:19px; width:0; height:0;
  border-left:8px solid var(--accent); border-top:5px solid transparent; border-bottom:5px solid transparent; }
.ladder .f1 { aspect-ratio:16/9; }
.ladder .f2 { aspect-ratio:16/9; width:78%; }
.ladder .f3 { aspect-ratio:4/3; width:60%; }
.ladder .f4 { aspect-ratio:16/9; width:46%; }
.ladder .f5 { aspect-ratio:4/3; width:30%; }

/* Tool card */
.tool {
  background: var(--card); color: var(--ink);
  border-radius: var(--radius); box-shadow: var(--shadow-md);
  padding: 22px; margin-top: 26px; border: 1px solid var(--line);
}
.tool .field-label { font-family:var(--f-mono); font-size:.78rem; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); margin-bottom:10px; display:block; }
.input-row { display:flex; gap:10px; }
.input-row input[type="text"]{
  flex:1; min-width:0; font-family:var(--f-body); font-size:1rem;
  padding:15px 16px; border:1.5px solid var(--line); border-radius:var(--radius-sm);
  background:var(--paper); color:var(--ink); transition:border-color .15s, box-shadow .15s;
}
.input-row input:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-wash); }
.input-row input::placeholder { color:var(--muted-2); }

.btn {
  font-family:var(--f-display); font-weight:700; font-size:.98rem;
  border:none; border-radius:var(--radius-sm); padding:15px 22px; cursor:pointer;
  display:inline-flex; align-items:center; gap:8px; white-space:nowrap;
  transition:transform .06s ease, background .15s, box-shadow .15s; text-decoration:none;
}
.btn:active { transform:translateY(1px); }
.btn-primary { background:var(--accent); color:#fff; box-shadow:0 6px 16px rgba(255,61,46,.35); }
.btn-primary:hover { background:var(--accent-ink); text-decoration:none; }
.btn-ghost { background:var(--paper); color:var(--ink); border:1.5px solid var(--line); }
.btn-ghost:hover { background:#ece8f4; text-decoration:none; }
.btn-paste { background:var(--ink); color:#fff; }
.btn-paste:hover { background:var(--ink-soft); text-decoration:none; }

.tool-actions { display:flex; gap:10px; margin-top:12px; flex-wrap:wrap; align-items:center; }
.hint { font-size:.85rem; color:var(--muted); margin:12px 0 0; }
.hint code { font-family:var(--f-mono); background:var(--paper); padding:2px 6px; border-radius:5px; font-size:.82em; }

.msg { margin-top:14px; padding:12px 14px; border-radius:var(--radius-sm); font-size:.92rem; display:none; }
.msg.show { display:block; }
.msg.error { background:#fdecec; color:#a01207; border:1px solid #f6c9c4; }
.msg.info  { background:#eef3ff; color:#1f3d99; border:1px solid #cfdcff; }

/* ---------- Social share ---------- */
.share { display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-top:18px; }
.share .share-label { font-family:var(--f-mono); font-size:.74rem; letter-spacing:.12em; text-transform:uppercase; color:var(--muted); }
.share a, .share button.share-btn {
  width:42px; height:42px; border-radius:11px; border:1px solid var(--line);
  background:#fff; display:inline-flex; align-items:center; justify-content:center;
  color:var(--ink); cursor:pointer; transition:transform .08s, box-shadow .15s, background .15s;
}
.share a:hover, .share button.share-btn:hover { transform:translateY(-2px); box-shadow:var(--shadow-sm); text-decoration:none; }
.share svg { width:19px; height:19px; }
.share .s-fb:hover{ background:#1877f2; color:#fff; }
.share .s-x:hover { background:#000; color:#fff; }
.share .s-wa:hover{ background:#25d366; color:#fff; }
.share .s-in:hover{ background:#0a66c2; color:#fff; }
.share .s-tg:hover{ background:#229ed9; color:#fff; }
.share .s-cp:hover{ background:var(--accent); color:#fff; }

/* ---------- Sections ---------- */
.section { padding: 58px 0; }
.section.alt { background:#fff; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section-head { max-width: 62ch; margin-bottom: 30px; }
.section-head p { color:var(--muted); margin:0; }

/* ---------- Results grid ---------- */
#results { margin-top: 30px; }
.results-head { display:flex; align-items:baseline; justify-content:space-between; gap:16px; flex-wrap:wrap; margin-bottom:18px; }
.results-head h2 { margin:0; }
.results-head .vidmeta { font-family:var(--f-mono); font-size:.8rem; color:var(--muted); }

.thumb-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(240px, 1fr)); gap:20px; }
.thumb-card {
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; box-shadow:var(--shadow-sm); display:flex; flex-direction:column;
  transition:transform .12s ease, box-shadow .15s ease;
}
.thumb-card:hover { transform:translateY(-3px); box-shadow:var(--shadow-md); }
.thumb-card .preview { background:#0f0d16; position:relative; display:flex; align-items:center; justify-content:center; min-height:150px; }
.thumb-card .preview img { width:100%; height:auto; }
.thumb-card .badge {
  position:absolute; top:10px; left:10px; font-family:var(--f-mono); font-size:.68rem;
  letter-spacing:.05em; background:rgba(0,0,0,.72); color:#fff; padding:4px 8px; border-radius:6px;
}
.thumb-card .body { padding:14px 15px 16px; display:flex; flex-direction:column; gap:4px; flex:1; }
.thumb-card .label { font-family:var(--f-display); font-weight:700; font-size:1.02rem; }
.thumb-card .dims { font-family:var(--f-mono); font-size:.82rem; color:var(--muted); }
.thumb-card .card-actions { margin-top:12px; display:flex; gap:8px; }
.thumb-card .btn { flex:1; justify-content:center; padding:11px 12px; font-size:.9rem; }
.thumb-card .btn-sm-ghost { background:var(--paper); border:1.5px solid var(--line); color:var(--ink); flex:0 0 auto; }
.thumb-card .btn-sm-ghost:hover { background:#ece8f4; }
.thumb-card.unavailable .preview::after {
  content:"Not available for this video"; position:absolute; inset:0; display:flex;
  align-items:center; justify-content:center; color:#b9b3c9; font-size:.82rem; background:#0f0d16; text-align:center; padding:12px;
}

/* ---------- Steps ---------- */
.steps { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; counter-reset:step; }
@media (max-width:760px){ .steps { grid-template-columns:1fr; } }
.step { background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:24px; }
.step .num { font-family:var(--f-mono); font-size:.78rem; letter-spacing:.1em; color:var(--accent-ink); }
.step h3 { margin:.4em 0 .3em; }
.step p { color:var(--muted); margin:0; font-size:.95rem; }

/* ---------- Feature list ---------- */
.features { display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:22px; }
.feature h3 { margin-top:0; display:flex; align-items:center; gap:9px; }
.feature .dot { width:10px; height:10px; border-radius:3px; background:var(--accent); display:inline-block; }
.feature p { color:var(--muted); font-size:.95rem; margin:0; }

/* ---------- Article / prose ---------- */
.prose { max-width: 72ch; }
.prose h2 { margin-top: 1.7em; }
.prose h3 { margin-top: 1.4em; }
.prose ul, .prose ol { margin:0 0 1.1em; padding-left:1.3em; }
.prose li { margin:.35em 0; }
.prose table { width:100%; border-collapse:collapse; margin:1.2em 0; font-size:.94rem; }
.prose th, .prose td { border:1px solid var(--line); padding:10px 12px; text-align:left; }
.prose th { background:var(--paper); font-family:var(--f-display); }
.prose td.mono, .prose .mono { font-family:var(--f-mono); }
.prose blockquote { margin:1.2em 0; padding:12px 18px; border-left:3px solid var(--accent); background:#fff; color:var(--muted); border-radius:0 8px 8px 0; }
.callout { background:var(--accent-wash); border:1px solid #f6c9c4; border-radius:var(--radius); padding:18px 20px; margin:1.4em 0; }
.callout p:last-child { margin-bottom:0; }

.page-hero { background:#fff; border-bottom:1px solid var(--line); padding:52px 0 40px; }
.page-hero .lede { color:var(--muted); font-size:1.1rem; max-width:60ch; margin-top:.2rem; }
.crumbs { font-family:var(--f-mono); font-size:.76rem; letter-spacing:.06em; color:var(--muted); margin-bottom:14px; }
.crumbs a { color:var(--muted); }

/* Related posts / silo links */
.related { margin-top:44px; padding-top:30px; border-top:1px solid var(--line); }
.related h2 { font-size:1.3rem; }
.post-cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:18px; margin-top:16px; }
.post-card { display:block; background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:20px; color:var(--ink); transition:transform .12s, box-shadow .15s; }
.post-card:hover { transform:translateY(-3px); box-shadow:var(--shadow-md); text-decoration:none; }
.post-card .kicker { font-family:var(--f-mono); font-size:.7rem; letter-spacing:.1em; text-transform:uppercase; color:var(--accent-ink); }
.post-card h3 { margin:.5em 0 .3em; font-size:1.08rem; }
.post-card p { color:var(--muted); font-size:.9rem; margin:0; }

/* Contact form */
.form-grid { display:grid; gap:16px; max-width:560px; }
.form-grid label { font-family:var(--f-display); font-weight:600; font-size:.92rem; display:block; margin-bottom:6px; }
.form-grid input, .form-grid textarea {
  width:100%; font-family:var(--f-body); font-size:1rem; padding:13px 14px;
  border:1.5px solid var(--line); border-radius:var(--radius-sm); background:#fff; color:var(--ink);
}
.form-grid input:focus, .form-grid textarea:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-wash); }
.form-note { font-size:.85rem; color:var(--muted); }

.contact-cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); gap:18px; margin:26px 0 6px; }
.contact-card { background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:20px; }
.contact-card .k { font-family:var(--f-mono); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); }
.contact-card .v { font-family:var(--f-display); font-weight:700; margin-top:6px; }

/* CTA band */
.cta-band { background:var(--ink); color:#fff; border-radius:var(--radius); padding:34px; display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap; }
.cta-band h2 { color:#fff; margin:0; }
.cta-band p { color:#cfc9df; margin:.4em 0 0; }

/* ---------- Footer ---------- */
.site-footer { background:var(--ink); color:#c9c3da; padding:52px 0 28px; margin-top:64px; }
.footer-grid { display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; }
@media (max-width:760px){ .footer-grid { grid-template-columns:1fr 1fr; gap:26px; } }
.site-footer h4 { color:#fff; font-size:.82rem; font-family:var(--f-mono); letter-spacing:.14em; text-transform:uppercase; margin:0 0 14px; }
.site-footer a { color:#c9c3da; display:block; padding:5px 0; font-size:.94rem; }
.site-footer a:hover { color:#fff; }
.foot-brand { display:inline-flex; align-items:center; gap:10px; color:#fff; font-family:var(--f-display); font-weight:700; margin-bottom:12px; }
.foot-brand svg{ width:30px; height:30px; }
.foot-brand:hover { text-decoration:none; }
.foot-about { font-size:.9rem; color:#9a94ad; max-width:34ch; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.12); margin-top:38px; padding-top:20px; display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap; font-size:.85rem; color:#9a94ad; }
.footer-bottom .mono { color:#8f89a3; }

/* Utilities */
.center { text-align:center; }
.mt-0 { margin-top:0; }
.tag-list { display:flex; flex-wrap:wrap; gap:8px; margin:8px 0 0; }
.tag-list span { font-family:var(--f-mono); font-size:.74rem; background:var(--paper); border:1px solid var(--line); color:var(--muted); padding:5px 10px; border-radius:999px; }

/* Focus visibility */
:focus-visible { outline:3px solid var(--focus); outline-offset:2px; border-radius:4px; }

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

/* Reveal animation for results */
@keyframes rise { from { opacity:0; transform:translateY(10px);} to { opacity:1; transform:none; } }
.rise { animation: rise .4s ease both; }