/* ==========================================================================
   TOOLKIT — shared design system
   Palette:  paper #F7F8FA · ink #14171F · slate #5B6472 · line #E4E7EC
             signal (accent) #2F6FED · signal-deep #1E4FC4 · good #16A34A · warn #D97706
   Type:     display = "Space Grotesk"  body = "Inter"  mono = "JetBrains Mono"
   Signature: the "spec plate" readout under every tool title, styled like an
   instrument nameplate (mono, tracked-out, bracketed).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  --paper:#F7F8FA;
  --paper-raised:#FFFFFF;
  --ink:#14171F;
  --slate:#5B6472;
  --slate-soft:#8890A0;
  --line:#E4E7EC;
  --line-soft:#EEF0F3;
  --signal:#2F6FED;
  --signal-deep:#1E4FC4;
  --signal-soft:#EAF1FE;
  --good:#16A34A;
  --good-soft:#E9F8EF;
  --warn:#D97706;
  --warn-soft:#FEF3E2;
  --danger:#DC2626;
  --danger-soft:#FDECEC;
  --radius-sm:6px;
  --radius:10px;
  --radius-lg:16px;
  --shadow-sm:0 1px 2px rgba(20,23,31,0.05);
  --shadow:0 4px 16px rgba(20,23,31,0.06), 0 1px 2px rgba(20,23,31,0.04);
  --shadow-lg:0 16px 40px rgba(20,23,31,0.10);
  color-scheme:light;
}

[data-theme="dark"]{
  --paper:#111318;
  --paper-raised:#191c23;
  --ink:#F3F4F6;
  --slate:#A7AFBD;
  --slate-soft:#7F8998;
  --line:#303641;
  --line-soft:#252A33;
  --signal-soft:#1B376F;
  --good-soft:#123D25;
  --warn-soft:#4A3210;
  --danger-soft:#4B1D1D;
  --shadow-sm:0 1px 2px rgba(0,0,0,0.25);
  --shadow:0 4px 16px rgba(0,0,0,0.28), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-lg:0 16px 40px rgba(0,0,0,0.45);
  color-scheme:dark;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
h1,h2,h3,h4,.font-display{
  font-family:'Space Grotesk',system-ui,sans-serif;
  letter-spacing:-0.01em;
}
.font-mono{font-family:'JetBrains Mono',ui-monospace,monospace;}
a{color:inherit;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important;}
}

:focus-visible{
  outline:2.5px solid var(--signal);
  outline-offset:2px;
  border-radius:4px;
}

/* ---------- layout shell ---------- */
.tk-header{
  position:sticky; top:0; z-index:40;
  background:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.tk-header-inner{
  max-width:1180px; margin:0 auto;
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 24px;
}
.tk-logo{
  display:flex; align-items:center; gap:10px;
  font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:18px;
  text-decoration:none; color:var(--ink);
}
.tk-logo-mark{
  width:30px; height:30px; border-radius:8px;
  background:linear-gradient(155deg,var(--signal),var(--signal-deep));
  position:relative; flex:none;
}
.tk-logo-mark::before, .tk-logo-mark::after{
  content:""; position:absolute; background:#fff; border-radius:1px;
}
.tk-logo-mark::before{ width:12px; height:2px; top:11px; left:9px; }
.tk-logo-mark::after{ width:2px; height:12px; top:9px; left:14px; }
.tk-logo small{
  font-family:'JetBrains Mono',monospace; font-weight:500; font-size:10px;
  letter-spacing:0.14em; color:var(--slate-soft); display:block; margin-top:1px;
}
.tk-nav{display:flex; align-items:center; gap:4px;}
.tk-nav a{
  font-size:14px; font-weight:500; color:var(--slate);
  text-decoration:none; padding:8px 12px; border-radius:8px;
}
.tk-nav a:hover{ color:var(--ink); background:var(--line-soft); }
.tk-breadcrumb{
  max-width:1180px; margin:0 auto; padding:16px 24px 0;
  font-family:'JetBrains Mono',monospace; font-size:12px;
  letter-spacing:0.03em; color:var(--slate-soft);
}
.tk-breadcrumb a{ color:var(--slate); text-decoration:none; }
.tk-breadcrumb a:hover{ color:var(--signal); }

.tk-footer{
  border-top:1px solid var(--line); margin-top:80px;
  padding:36px 24px 48px; color:var(--slate-soft);
}
.tk-footer-inner{
  max-width:1180px; margin:0 auto; display:flex; justify-content:space-between;
  align-items:center; flex-wrap:wrap; gap:12px; font-size:13px;
}

/* ---------- spec plate (signature element) ---------- */
.spec-plate{
  display:inline-flex; align-items:center; gap:0;
  font-family:'JetBrains Mono',monospace; font-size:11.5px; letter-spacing:0.04em;
  color:var(--slate); background:var(--paper-raised);
  border:1px solid var(--line); border-radius:999px; overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.spec-plate span{ padding:7px 13px; }
.spec-plate span + span{ border-left:1px dashed var(--line); }
.spec-plate .spec-io{ color:var(--ink); font-weight:600; }
.spec-plate .spec-dot{
  width:6px; height:6px; border-radius:50%; background:var(--good);
  display:inline-block; margin-right:7px; box-shadow:0 0 0 3px var(--good-soft);
}

/* ---------- generic page shell ---------- */
.tk-main{ max-width:920px; margin:0 auto; padding:28px 24px 64px; }
.tk-hero{ padding:8px 0 28px; }
.tk-hero h1{ font-size:30px; font-weight:700; margin:14px 0 10px; }
.tk-hero p{ color:var(--slate); font-size:15px; max-width:60ch; }

/* ---------- panel / cards ---------- */
.panel{
  background:var(--paper-raised); border:1px solid var(--line);
  border-radius:var(--radius-lg); box-shadow:var(--shadow-sm);
  padding:28px;
}
.card{
  background:var(--paper-raised); border:1px solid var(--line);
  border-radius:var(--radius); padding:18px; text-decoration:none; color:var(--ink);
  display:flex; flex-direction:column; gap:8px; transition:border-color .15s, transform .15s, box-shadow .15s;
}
.card:hover{ border-color:var(--signal); transform:translateY(-2px); box-shadow:var(--shadow); }
.card-icon{
  width:38px; height:38px; border-radius:9px; background:var(--signal-soft);
  color:var(--signal-deep); display:flex; align-items:center; justify-content:center;
  font-family:'Space Grotesk',monospace; font-weight:700; font-size:15px;
}
.card-icon svg{ width:20px; height:20px; }
.card h3{ font-size:15px; margin:0; font-weight:600; }
.card p{ font-size:12.5px; color:var(--slate); margin:0; line-height:1.45; }

/* ---------- dropzone ---------- */
.dropzone{
  border:1.5px dashed var(--line); border-radius:var(--radius-lg);
  padding:38px 20px; text-align:center; cursor:pointer;
  background:var(--paper); transition:border-color .15s, background .15s;
}
.dropzone.drag{ border-color:var(--signal); background:var(--signal-soft); }
.dropzone .dz-icon{
  width:46px; height:46px; margin:0 auto 12px; border-radius:12px;
  background:var(--signal-soft); color:var(--signal-deep);
  display:flex; align-items:center; justify-content:center; font-size:20px;
}
.dropzone strong{ font-size:14.5px; }
.dropzone .dz-sub{ font-size:12.5px; color:var(--slate-soft); margin-top:4px; }

/* ---------- form controls ---------- */
label.field-label{
  display:block; font-size:12.5px; font-weight:600; color:var(--slate);
  margin-bottom:6px; letter-spacing:0.01em;
}
input[type=text], input[type=number], input[type=password], input[type=tel], input[type=email], textarea, select{
  width:100%; border:1px solid var(--line); background:var(--paper-raised);
  border-radius:var(--radius-sm); padding:10px 12px; font-size:14px; color:var(--ink);
  font-family:inherit;
}
textarea{ resize:vertical; }
input:focus, textarea:focus, select:focus{ border-color:var(--signal); }

input[type=range]{
  -webkit-appearance:none; width:100%; height:5px; border-radius:3px;
  background:var(--line); outline:none;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; width:18px; height:18px; border-radius:50%;
  background:var(--signal); border:3px solid #fff; box-shadow:0 0 0 1px var(--line);
  cursor:pointer; margin-top:-6.5px;
}
input[type=range]::-moz-range-thumb{
  width:18px; height:18px; border-radius:50%; background:var(--signal);
  border:3px solid #fff; box-shadow:0 0 0 1px var(--line); cursor:pointer;
}

.checkline{ display:flex; align-items:center; gap:9px; font-size:13.5px; color:var(--ink); }
.checkline input{ width:16px; height:16px; accent-color:var(--signal); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:14px;
  border-radius:var(--radius-sm); padding:11px 20px; border:1px solid transparent;
  cursor:pointer; text-decoration:none; transition:filter .12s, transform .05s;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--signal); color:#fff; box-shadow:0 6px 16px rgba(47,111,237,0.28); }
.btn-primary:hover{ filter:brightness(1.06); }
.btn-primary:disabled{ background:var(--slate-soft); box-shadow:none; cursor:not-allowed; }
.btn-ghost{ background:var(--paper-raised); border-color:var(--line); color:var(--ink); }
.btn-ghost:hover{ border-color:var(--signal); color:var(--signal-deep); }
.btn-sm{ padding:7px 13px; font-size:12.5px; }
.btn-block{ width:100%; }

/* ---------- misc ---------- */
.badge{
  display:inline-flex; align-items:center; font-family:'JetBrains Mono',monospace;
  font-size:10.5px; letter-spacing:0.05em; padding:3px 8px; border-radius:5px;
  background:var(--good-soft); color:#0F7A38; font-weight:600;
}
.hr{ height:1px; background:var(--line); margin:22px 0; border:0; }
.result-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 0; border-bottom:1px solid var(--line-soft); font-size:13.5px;
}
.result-row:last-child{ border-bottom:0; }
.stat-compare{
  display:grid; grid-template-columns:1fr auto 1fr; align-items:center; gap:14px;
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:16px 20px; margin-top:16px;
}
.stat-compare .stat{ text-align:center; }
.stat-compare .stat .n{ font-family:'JetBrains Mono',monospace; font-weight:600; font-size:19px; }
.stat-compare .stat .l{ font-size:11px; color:var(--slate-soft); text-transform:uppercase; letter-spacing:0.08em; margin-top:2px;}
.stat-compare .arrow{ color:var(--signal); font-size:18px; }
.stat-saved{ color:var(--good); font-weight:700; }

.file-chip{
  display:flex; align-items:center; gap:10px; background:var(--paper);
  border:1px solid var(--line); border-radius:var(--radius-sm); padding:9px 12px;
  font-size:13px; margin-top:8px;
}
.file-chip .fc-icon{ color:var(--signal-deep); font-family:'JetBrains Mono',monospace; font-weight:700; font-size:11px; background:var(--signal-soft); padding:4px 6px; border-radius:5px; }
.file-chip .fc-name{ flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.file-chip .fc-remove{ color:var(--slate-soft); cursor:pointer; background:none; border:none; font-size:15px; }
.file-chip .fc-remove:hover{ color:var(--danger); }

/* ---------- ad slots ---------- */
.ad-slot{
  border:1px dashed var(--line); border-radius:var(--radius);
  background:repeating-linear-gradient(135deg, var(--line-soft), var(--line-soft) 10px, var(--paper) 10px, var(--paper) 20px);
  color:var(--slate-soft); font-family:'JetBrains Mono',monospace; font-size:11px;
  letter-spacing:0.08em; text-transform:uppercase;
  display:flex; align-items:center; justify-content:center;
  min-height:90px; margin:20px 0;
}

/* ---------- ad modal (interstitial simulation) ---------- */
.adm-overlay{
  position:fixed; inset:0; background:rgba(14,16,22,0.72); backdrop-filter:blur(3px);
  display:flex; align-items:center; justify-content:center; z-index:100; padding:20px;
}
.adm-box{
  background:var(--paper-raised); border-radius:var(--radius-lg); width:100%; max-width:420px;
  overflow:hidden; box-shadow:var(--shadow-lg); text-align:center;
}
.adm-canvas{
  height:220px; background:linear-gradient(150deg,var(--signal),var(--signal-deep));
  display:flex; flex-direction:column; align-items:center; justify-content:center; color:#fff; gap:10px;
}
.adm-ring{
  width:46px; height:46px; border-radius:50%; border:3px solid rgba(255,255,255,0.35);
  border-top-color:#fff; animation:spin 0.9s linear infinite;
}
@keyframes spin{ to{ transform:rotate(360deg); } }
.adm-body{ padding:22px 24px 26px; }
.adm-body .adm-label{ font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:0.1em; color:var(--slate-soft); text-transform:uppercase; }
.adm-body h4{ margin:8px 0 4px; font-size:16px; }
.adm-body p{ color:var(--slate); font-size:13px; margin:0 0 18px; }

/* ---------- index page ---------- */
.hero-index{
  max-width:1180px; margin:0 auto; padding:64px 24px 30px; text-align:center;
}
.hero-index h1{ font-size:44px; font-weight:700; margin:0 0 14px; }
.hero-index p{ color:var(--slate); font-size:16px; max-width:52ch; margin:0 auto; }
.search-wrap{ max-width:560px; margin:34px auto 0; position:relative; }
.search-wrap input{
  width:100%; padding:15px 18px 15px 46px; border-radius:999px;
  border:1.5px solid var(--line); font-size:15px; background:var(--paper-raised);
  box-shadow:var(--shadow-sm);
}
.search-wrap input:focus{ border-color:var(--signal); }
.search-wrap .si{ position:absolute; left:18px; top:50%; transform:translateY(-50%); color:var(--slate-soft); }

.cat-section{ max-width:1180px; margin:0 auto; padding:34px 24px 0; }
.cat-head{ display:flex; align-items:baseline; gap:10px; margin-bottom:16px; }
.cat-head .cat-idx{ font-family:'JetBrains Mono',monospace; color:var(--signal); font-weight:600; font-size:13px; }
.cat-head h2{ font-size:19px; margin:0; }
.cat-head .cat-count{ font-family:'JetBrains Mono',monospace; font-size:11.5px; color:var(--slate-soft); }
.cat-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:14px; }
.no-results{ text-align:center; padding:60px 20px; color:var(--slate-soft); display:none; }
.category-main{ max-width:1180px; margin:0 auto; padding:28px 24px 64px; }
.category-hero{ padding:8px 0 30px; }
.category-hero h1{ font-size:36px; margin:16px 0 8px; }
.category-hero p{ color:var(--slate); max-width:58ch; margin:0; }

@media (max-width:640px){
  .tk-nav{ display:none; position:absolute; top:100%; left:0; right:0; padding:8px 24px 14px; background:var(--paper-raised); border-bottom:1px solid var(--line); flex-direction:column; align-items:stretch; }
  .tk-nav.tk-nav-open{ display:flex; }
  .hero-index h1{ font-size:30px; }
  .tk-hero h1{ font-size:24px; }
  .stat-compare{ grid-template-columns:1fr; }
  .stat-compare .arrow{ transform:rotate(90deg); }
  .category-hero h1{ font-size:28px; }
}

.tk-header-actions{display:flex;align-items:center;gap:8px;}
.tk-theme-toggle,.tk-nav-toggle{border:1px solid var(--line);background:var(--paper-raised);color:var(--ink);border-radius:8px;min-width:36px;height:36px;cursor:pointer;font-size:16px;}
.tk-nav-toggle{display:none;}
@media (max-width:640px){.tk-nav-toggle{display:inline-flex;align-items:center;justify-content:center;}.tk-header-inner{position:relative;}}

/* ---------- SEO content block (How to Use + FAQ) ---------- */
.tk-seo{ margin-top:32px; }
.tk-seo h2{ font-size:20px; margin:0 0 14px; }
.tk-seo-block{ margin-bottom:26px; }
.howto-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; }
.howto-list li{ display:flex; gap:12px; align-items:flex-start; font-size:14px; color:var(--slate); line-height:1.55; }
.howto-num{
  flex:none; width:24px; height:24px; border-radius:50%; background:var(--signal-soft);
  color:var(--signal-deep); font-family:'JetBrains Mono',monospace; font-weight:700; font-size:12px;
  display:flex; align-items:center; justify-content:center; margin-top:1px;
}
.faq-item{ border-top:1px solid var(--line); padding:14px 0; }
.faq-item:first-child{ border-top:none; padding-top:0; }
.faq-item dt{ font-weight:600; font-size:14.5px; color:var(--ink); margin-bottom:6px; }
.faq-item dd{ margin:0; font-size:14px; color:var(--slate); line-height:1.55; }

/* ---------- downloader (Instagram / TikTok) ---------- */
.dl-tabs{ display:flex; gap:8px; flex-wrap:wrap; margin-bottom:22px; }
.dl-tabs a{
  font-size:13px; font-weight:600; padding:8px 14px; border-radius:999px;
  border:1px solid var(--line); color:var(--slate); text-decoration:none; background:var(--paper-raised);
  transition:border-color .15s, color .15s;
}
.dl-tabs a:hover{ border-color:var(--signal); color:var(--signal-deep); }
.dl-tabs a.active{ background:var(--signal); border-color:var(--signal); color:#fff; }
.dl-input-row{ display:flex; gap:10px; flex-wrap:wrap; }
.dl-input-row input[type="text"]{
  flex:1; min-width:200px; padding:14px 16px; border-radius:10px; border:1.5px solid var(--line);
  font-size:14px; font-family:inherit; background:var(--paper);
}
.dl-input-row input[type="text"]:focus{ outline:none; border-color:var(--signal); }
.dl-input-row .btn{ flex:none; }
.dl-results{ display:none; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:16px; margin-top:24px; }
.dl-result-card{
  border:1px solid var(--line); border-radius:var(--radius); padding:12px; background:var(--paper-raised);
}
.dl-thumb{ width:100%; border-radius:8px; display:block; background:#000; max-height:280px; object-fit:contain; }
.dl-status{ font-size:13px; color:var(--slate-soft); margin-top:10px; min-height:18px; }
.dl-note{
  margin-top:16px; font-size:12.5px; color:var(--slate-soft); background:var(--paper);
  border:1px dashed var(--line); border-radius:8px; padding:10px 12px;
}