:root{
    --bg:#14171c;
    --bg-elev:#1b1f26;
    --surface:#20242c;
    --border:#2a2f38;
    --border-soft:#252a32;
    --text:#e7e9ec;
    --text-muted:#8b92a0;
    --text-faint:#5c6270;
    --amber:#e8a33d;
    --amber-dim:#a8792f;
    --teal:#5eead4;
    --danger:#e2685a;
    --serif: 'Fraunces', Georgia, 'Noto Serif Bengali', serif;
    --sans: 'IBM Plex Sans', 'Noto Sans Bengali', -apple-system, sans-serif;
    --mono: 'IBM Plex Mono', 'Courier New', monospace;
    --maxw:1120px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0; background:var(--bg); color:var(--text);
    font-family:var(--sans); font-size:16px; line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;}
  .wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px;}
  @media (max-width:640px){ .wrap{padding:0 18px;} }

  /* ---------- Header ---------- */
  .site-header{
    position:sticky; top:0; z-index:60;
    background:rgba(20,23,28,0.82);
    backdrop-filter:saturate(140%) blur(14px); -webkit-backdrop-filter:saturate(140%) blur(14px);
    border-bottom:1px solid var(--border-soft);
  }
  .site-header::after{
    content:""; position:absolute; left:0; right:0; bottom:-1px; height:1px; pointer-events:none;
    background:linear-gradient(90deg, transparent, var(--amber-dim), transparent); opacity:.5;
  }
  .hb{display:flex; align-items:center; gap:20px; height:68px;}
  .brand{display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--text); flex-shrink:0; min-width:0;}
  .brand img{height:34px; width:auto; max-width:200px; display:block; object-fit:contain;}
  .brand-text{
    font-family:var(--serif); font-size:21px; font-weight:600; letter-spacing:0.2px;
    display:flex; align-items:center; gap:9px; white-space:nowrap;
  }
  .brand-text .dot{
    width:9px; height:9px; border-radius:50%; background:var(--amber); flex-shrink:0;
    box-shadow:0 0 0 4px rgba(232,163,61,0.16);
  }
  .brand-tag{display:none; font-family:var(--mono); font-size:11px; color:var(--text-faint); padding-left:10px; border-left:1px solid var(--border); white-space:nowrap;}
  @media(min-width:1040px){ .brand-tag{display:inline-block;} }

  .main-nav{margin-left:auto; display:flex; align-items:center; gap:4px;}
  .main-nav a{
    position:relative; padding:8px 13px; font-size:14px; color:var(--text-muted);
    text-decoration:none; border-radius:8px; transition:color .15s, background .15s; white-space:nowrap;
  }
  .main-nav a:hover{color:var(--text); background:var(--surface);}
  .main-nav a.active{color:var(--text);}
  .main-nav a.active::after{
    content:""; position:absolute; left:13px; right:13px; bottom:2px; height:2px; border-radius:2px; background:var(--amber);
  }
  .main-nav a.nav-cta{
    margin-left:8px; background:var(--amber); color:#14171c; font-weight:600; padding:8px 18px; border-radius:999px;
  }
  .main-nav a.nav-cta:hover{background:#f0b356; color:#14171c;}
  .main-nav a.nav-cta::after{display:none;}

  .nav-toggle{
    display:none; margin-left:auto; width:42px; height:42px; border:1px solid var(--border);
    background:var(--bg-elev); border-radius:10px; cursor:pointer; padding:0;
    flex-direction:column; align-items:center; justify-content:center; gap:5px;
  }
  .nav-toggle span{display:block; width:18px; height:2px; border-radius:2px; background:var(--text); transition:transform .2s, opacity .2s;}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  @media(max-width:860px){
    .hb{height:62px;}
    .nav-toggle{display:flex;}
    .main-nav{
      display:none; position:absolute; top:100%; left:0; right:0; margin-left:0;
      flex-direction:column; align-items:stretch; gap:2px;
      background:#14171c; border-bottom:1px solid var(--border); padding:10px 18px 18px; box-shadow:0 18px 30px rgba(0,0,0,0.35);
    }
    .main-nav.open{display:flex;}
    .main-nav a{padding:13px 14px; font-size:15px;}
    .main-nav a.active::after{left:14px; right:auto; width:22px; bottom:6px;}
    .main-nav a.nav-cta{margin:10px 0 0; text-align:center; padding:12px 18px;}
  }

  /* footer wordmark (text logo) */
  .wordmark{
    font-family:var(--serif); font-size:20px; font-weight:600; letter-spacing:0.2px;
    display:flex; align-items:center; gap:8px; white-space:nowrap;
  }
  .wordmark .dot{width:8px; height:8px; border-radius:50%; background:var(--amber); display:inline-block; flex-shrink:0;}
  .wordmark img{height:30px; width:auto; max-width:180px; display:block;}
  #tool{scroll-margin-top:90px;}

  /* ---------- Hero ---------- */
  .hero{padding:64px 0 40px;}
  .hero-grid{display:grid; grid-template-columns:1.15fr 0.95fr; gap:56px; align-items:start;}
  @media(max-width:880px){ .hero-grid{grid-template-columns:1fr; gap:36px;} }
  h1{
    font-family:var(--serif); font-weight:470; font-size:44px; line-height:1.12;
    margin:0 0 18px; letter-spacing:-0.5px;
  }
  @media(max-width:640px){ h1{font-size:32px;} }
  .hero p.lede{color:var(--text-muted); font-size:17px; max-width:52ch; margin:0 0 26px;}
  .hero-facts{display:flex; flex-wrap:wrap; gap:22px; margin-top:30px;}
  .fact{font-family:var(--mono); font-size:13px; color:var(--text-muted); border-left:2px solid var(--border); padding-left:10px;}
  .fact b{color:var(--text); font-weight:500; display:block; font-size:13px;}

  /* ---------- Upload panel ---------- */
  .panel{
    background:var(--bg-elev); border:1px solid var(--border); border-radius:10px;
    padding:22px; position:relative;
  }
  .dropzone{
    border:1.5px dashed var(--border); border-radius:8px; padding:38px 20px;
    text-align:center; cursor:pointer; transition:border-color .15s, background .15s;
  }
  .dropzone.drag{border-color:var(--amber); background:rgba(232,163,61,0.06);}
  .dropzone .glyph{font-family:var(--mono); font-size:12px; color:var(--text-faint); margin-bottom:14px;}
  .dropzone .cta-line{font-size:15px; margin-bottom:6px;}
  .dropzone .sub{font-size:12.5px; color:var(--text-faint);}
  .dropzone input{display:none;}
  .browse-btn{
    display:inline-block; margin-top:16px; background:var(--surface); border:1px solid var(--border);
    color:var(--text); font-family:var(--sans); font-size:13.5px; padding:9px 18px; border-radius:6px;
  }

  .filecard{display:none; align-items:center; gap:14px; margin-top:16px; padding:12px; background:var(--surface); border-radius:8px; border:1px solid var(--border-soft);}
  .filecard.show{display:flex;}
  .thumb{width:52px;height:52px;border-radius:6px;object-fit:cover;background:#000;flex-shrink:0;}
  .filecard .meta{font-size:13px; color:var(--text-muted); overflow:hidden;}
  .filecard .meta .name{color:var(--text); font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:220px;}
  .filecard .clear{margin-left:auto; background:none; border:none; color:var(--text-faint); cursor:pointer; font-size:18px; line-height:1;}

  .error-box{display:none; margin-top:14px; padding:10px 12px; border-radius:6px; background:rgba(226,104,90,0.1); border:1px solid rgba(226,104,90,0.35); color:#f0a89e; font-size:13px;}
  .error-box.show{display:block;}

  /* ---------- Mode panels ---------- */
  .mode-panel{display:none;}
  .mode-panel.active{display:block;}

  .scan-status{font-family:var(--mono); font-size:12.5px; color:var(--amber); margin-top:16px; display:none; align-items:center; gap:8px;}
  .scan-status.show{display:flex;}
  .pulse{width:6px;height:6px;border-radius:50%;background:var(--amber); animation:pulse 1s infinite ease-in-out;}
  @keyframes pulse{0%,100%{opacity:.3;} 50%{opacity:1;}}

  table.tagtable{width:100%; border-collapse:collapse; margin-top:16px; font-family:var(--mono); font-size:12.5px;}
  table.tagtable th{text-align:left; color:var(--text-faint); font-weight:500; padding:6px 8px; border-bottom:1px solid var(--border); font-size:11.5px;}
  table.tagtable td{padding:7px 8px; border-bottom:1px solid var(--border-soft); color:var(--text-muted);}
  table.tagtable td.name{color:var(--text);}
  table.tagtable td.flag{color:var(--amber);}
  .tag-empty{font-family:var(--mono); font-size:12.5px; color:var(--teal); margin-top:16px;}

  /* ---------- C2PA breakdown ---------- */
  .c2pa-card{margin-top:18px; border:1px solid var(--border); border-radius:8px; overflow:hidden;}
  .c2pa-card .c2pa-head{display:flex; align-items:center; gap:8px; padding:10px 14px; background:var(--surface); border-bottom:1px solid var(--border);}
  .c2pa-card .c2pa-head .icon{font-size:14px;}
  .c2pa-card .c2pa-head h4{margin:0; font-size:13px; font-weight:600; color:var(--text);}
  .c2pa-card.status-detected .c2pa-head{background:rgba(232,163,61,0.1);}
  .c2pa-card.status-clean .c2pa-head{background:rgba(94,234,212,0.08);}
  .c2pa-row{display:grid; grid-template-columns:150px 1fr; gap:10px; padding:9px 14px; border-bottom:1px solid var(--border-soft); font-size:13px;}
  .c2pa-row:last-child{border-bottom:none;}
  .c2pa-row .k{font-family:var(--mono); color:var(--text-faint); font-size:11.5px; align-self:start; padding-top:1px;}
  .c2pa-row .v{color:var(--text); word-break:break-word;}
  .c2pa-row .v.mono{font-family:var(--mono); font-size:12px; color:var(--text-muted);}
  .c2pa-pill{display:inline-block; padding:2px 8px; border-radius:20px; font-size:11px; font-family:var(--mono);}
  .c2pa-pill.amber{background:rgba(232,163,61,0.15); color:var(--amber);}
  .c2pa-pill.teal{background:rgba(94,234,212,0.15); color:var(--teal);}
  .c2pa-action-item{padding:8px 0; border-bottom:1px dashed var(--border-soft);}
  .c2pa-action-item:last-child{border-bottom:none;}
  .c2pa-action-item .a-name{font-family:var(--mono); font-size:12.5px; color:var(--amber);}
  .c2pa-action-item .a-detail{font-size:12px; color:var(--text-muted); margin-top:2px;}
  .other-data-toggle{width:100%; text-align:left; background:var(--surface); border:1px solid var(--border); color:var(--text); font-family:var(--sans); font-size:13px; font-weight:500; padding:10px 14px; border-radius:8px; cursor:pointer; margin-top:14px; display:flex; justify-content:space-between; align-items:center;}
  .other-data-body{display:none; margin-top:8px;}
  .other-data-body.open{display:block;}

  .action-row{display:flex; gap:10px; margin-top:20px; flex-wrap:wrap;}
  .btn{
    font-family:var(--sans); font-size:14.5px; font-weight:500; padding:11px 20px; border-radius:7px;
    border:1px solid transparent; cursor:pointer; transition:transform .1s, opacity .15s;
  }
  .btn:active{transform:scale(0.98);}
  .btn:disabled{opacity:0.4; cursor:not-allowed;}
  .btn-primary{background:var(--amber); color:#181205;}
  .btn-primary:hover:not(:disabled){opacity:0.92;}
  .btn-success{background:var(--teal); color:#0d1f1c;}
  .btn-ghost{background:none; border-color:var(--border); color:var(--text-muted);}
  .btn-ghost:hover{color:var(--text); border-color:var(--text-faint);}

  .result-box{display:none; margin-top:18px; padding:16px; border-radius:8px; background:rgba(94,234,212,0.06); border:1px solid rgba(94,234,212,0.3);}
  .result-box.show{display:block;}
  .result-box .headline{color:var(--teal); font-family:var(--mono); font-size:13px; margin-bottom:4px;}
  .result-box .note{font-size:12.5px; color:var(--text-muted);}

  .edit-fields{display:grid; gap:12px; margin-top:16px;}
  .edit-fields label{font-size:12.5px; color:var(--text-muted); display:block; margin-bottom:5px;}
  .edit-fields input{
    width:100%; background:var(--surface); border:1px solid var(--border); border-radius:6px;
    padding:9px 11px; color:var(--text); font-family:var(--sans); font-size:14px;
  }
  .edit-fields input:focus{outline:none; border-color:var(--amber);}
  .edit-note{font-size:12px; color:var(--text-faint); margin-top:10px;}

  /* ---------- Sections ---------- */
  section{padding:56px 0; border-top:1px solid var(--border-soft);}
  h2{font-family:var(--serif); font-size:28px; font-weight:470; margin:0 0 8px; letter-spacing:-0.3px;}
  .section-sub{color:var(--text-muted); font-size:15px; max-width:60ch; margin:0 0 34px;}

  .spec-row{
    display:grid; grid-template-columns:220px 1fr; gap:24px; padding:20px 0;
    border-bottom:1px solid var(--border-soft);
  }
  .spec-row:first-of-type{border-top:1px solid var(--border-soft);}
  @media(max-width:680px){ .spec-row{grid-template-columns:1fr; gap:6px;} }
  .spec-row .label{font-family:var(--mono); font-size:13px; color:var(--amber);}
  .spec-row .desc{color:var(--text-muted); font-size:14.5px; max-width:62ch;}
  .spec-row .desc b{color:var(--text); font-weight:500;}

  .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:24px;}
  @media(max-width:880px){ .steps{grid-template-columns:1fr 1fr;} }
  @media(max-width:520px){ .steps{grid-template-columns:1fr;} }
  .step .num{font-family:var(--mono); font-size:13px; color:var(--text-faint); margin-bottom:10px;}
  .step h3{font-family:var(--sans); font-size:15.5px; font-weight:600; margin:0 0 8px;}
  .step p{font-size:13.5px; color:var(--text-muted); margin:0;}

  .faq-item{border-bottom:1px solid var(--border-soft);}
  .faq-q{
    width:100%; text-align:left; background:none; border:none; color:var(--text);
    font-family:var(--sans); font-size:15.5px; font-weight:500; padding:18px 0; cursor:pointer;
    display:flex; justify-content:space-between; align-items:center; gap:16px;
  }
  .faq-q .ind{font-family:var(--mono); color:var(--text-faint); font-size:16px; flex-shrink:0;}
  .faq-a{max-height:0; overflow:hidden; transition:max-height .25s ease;}
  .faq-a p{color:var(--text-muted); font-size:14.5px; margin:0 0 18px; max-width:70ch;}
  .faq-item.open .faq-a{max-height:220px;}

  footer{border-top:1px solid var(--border-soft); padding:40px 0 30px;}
  .foot-grid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:28px;}
  @media(max-width:680px){ .foot-grid{grid-template-columns:1fr; gap:24px;} }
  footer h4{font-size:12.5px; color:var(--text-faint); font-weight:500; margin:0 0 12px;}
  footer p{font-size:13.5px; color:var(--text-muted); max-width:44ch; margin:0;}
  footer ul{list-style:none; padding:0; margin:0; display:grid; gap:9px;}
  footer a{font-size:13.5px; color:var(--text-muted); text-decoration:none;}
  footer a:hover{color:var(--text);}
  .foot-bottom{margin-top:32px; padding-top:20px; border-top:1px solid var(--border-soft); font-size:12.5px; color:var(--text-faint); display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}

  .sr-only{position:absolute; width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);}
  :focus-visible{outline:2px solid var(--amber); outline-offset:2px;}

  /* ---------- Static content pages (legal/guide/about) ---------- */
  .page-hero{padding:48px 0 24px; border-top:none;}
  .page-hero h1{margin-bottom:10px;}
  .page-hero .meta{font-family:var(--mono); font-size:12px; color:var(--text-faint);}
  .prose{max-width:74ch;}
  .prose h2{font-size:22px; margin:36px 0 12px;}
  .prose h3{font-family:var(--sans); font-size:16px; font-weight:600; margin:24px 0 8px; color:var(--text);}
  .prose p{color:var(--text-muted); font-size:15px; margin:0 0 16px;}
  .prose ul, .prose ol{color:var(--text-muted); font-size:15px; padding-left:22px; margin:0 0 16px;}
  .prose li{margin-bottom:6px;}
  .prose a{color:var(--amber);}
  .prose code{font-family:var(--mono); font-size:13px; background:var(--surface); padding:2px 6px; border-radius:4px;}
  .back-link{display:inline-block; margin-bottom:24px; font-family:var(--mono); font-size:13px; color:var(--text-muted); text-decoration:none;}
  .back-link:hover{color:var(--text);}
  .guide-grid{display:grid; grid-template-columns:1fr 1fr; gap:20px; margin-top:8px;}
  @media(max-width:680px){ .guide-grid{grid-template-columns:1fr;} }
  .guide-card{border:1px solid var(--border); border-radius:8px; padding:18px; text-decoration:none; display:block;}
  .guide-card:hover{border-color:var(--text-faint);}
  .guide-card h3{margin:0 0 6px; font-family:var(--sans); font-size:15px; color:var(--text);}
  .guide-card p{margin:0; font-size:13px; color:var(--text-muted);}
  .ad-slot{margin:32px 0; padding:14px; border:1px dashed var(--border); border-radius:8px; text-align:center; font-family:var(--mono); font-size:11px; color:var(--text-faint);}
  .contact-card{border:1px solid var(--border); border-radius:8px; padding:20px; margin-top:20px; max-width:60ch;}
  .contact-card .row{display:flex; gap:10px; margin-bottom:10px; font-size:14px;}
  .contact-card .row .k{color:var(--text-faint); width:90px; flex-shrink:0; font-family:var(--mono); font-size:12px;}

  /* ---------- Tool mode tabs (inside tool panel) ---------- */
  .mode-tabs{display:flex; gap:4px; padding:4px; margin-bottom:16px; background:var(--bg); border:1px solid var(--border); border-radius:10px;}
  .mode-tabs button{
    flex:1; background:none; border:none; color:var(--text-muted); font-family:var(--sans);
    font-size:14px; padding:9px 10px; cursor:pointer; border-radius:7px; transition:color .15s, background .15s;
  }
  .mode-tabs button:hover{color:var(--text); background:var(--surface);}
  .mode-tabs button.active{color:var(--bg); background:var(--amber); font-weight:600;}


  /* ---------- Blog ---------- */
  .blog-intro{max-width:62ch; color:var(--text-muted); font-size:17px; margin:0;}
  .post-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:22px; margin-top:8px;}
  @media(max-width:980px){ .post-grid{grid-template-columns:1fr 1fr;} }
  @media(max-width:640px){ .post-grid{grid-template-columns:1fr;} }
  .post-card{
    display:flex; flex-direction:column; border:1px solid var(--border); border-radius:12px; overflow:hidden;
    text-decoration:none; color:inherit; background:var(--bg-elev); transition:border-color .15s, transform .15s;
  }
  .post-card:hover{border-color:var(--amber-dim); transform:translateY(-2px);}
  .post-cover{aspect-ratio:16/9; background:var(--surface); overflow:hidden;}
  .post-cover img{width:100%; height:100%; object-fit:cover; display:block;}
  .post-cover.ph{
    display:flex; align-items:center; justify-content:center;
    background:linear-gradient(135deg, var(--surface), var(--bg-elev));
  }
  .post-cover.ph span{width:34px; height:34px; border:2px solid var(--amber-dim); border-radius:8px; position:relative;}
  .post-cover.ph span::after{content:""; position:absolute; inset:9px; border-radius:50%; background:var(--amber);}
  .post-body{padding:18px 18px 20px; display:flex; flex-direction:column; gap:8px; flex:1;}
  .post-body h3{margin:0; font-family:var(--serif); font-size:20px; line-height:1.25; color:var(--text);}
  .post-body p{margin:0; font-size:14px; color:var(--text-muted);}
  .post-meta{font-family:var(--mono); font-size:11.5px; color:var(--text-faint); margin-top:auto; padding-top:6px;}
  .tag-row{display:flex; flex-wrap:wrap; gap:6px;}
  .tag{font-family:var(--mono); font-size:11px; color:var(--amber); border:1px solid rgba(232,163,61,0.35); padding:2px 8px; border-radius:999px;}
  .post-hero-cover{margin:8px 0 0; border-radius:12px; overflow:hidden; border:1px solid var(--border);}
  .post-hero-cover img{width:100%; display:block; max-height:460px; object-fit:cover;}
  .empty-state{border:1px dashed var(--border); border-radius:12px; padding:40px 24px; text-align:center; color:var(--text-muted);}
  .cta-box{
    margin-top:36px; padding:22px 24px; border:1px solid var(--border); border-radius:12px; background:var(--bg-elev);
    display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  }
  .cta-box p{margin:0; color:var(--text-muted); font-size:15px; max-width:50ch;}
  .cta-box a{background:var(--amber); color:#14171c; font-weight:600; text-decoration:none; padding:10px 20px; border-radius:999px; font-size:14px;}
  .prose img{max-width:100%; height:auto; border-radius:8px;}
  .prose figure{margin:24px 0;}
  .prose figcaption{font-size:13px; color:var(--text-faint); margin-top:8px; text-align:center;}
  .prose blockquote{margin:20px 0; padding:4px 18px; border-left:3px solid var(--amber-dim); color:var(--text-muted);}
  .prose pre{background:var(--bg-elev); border:1px solid var(--border); border-radius:8px; padding:14px 16px; overflow-x:auto; font-size:13px; line-height:1.55;}
  .prose code{font-family:var(--mono); font-size:0.9em;}
  .prose :not(pre) > code{background:var(--surface); padding:1px 6px; border-radius:4px;}
  .prose hr{border:none; border-top:1px solid var(--border); margin:32px 0;}
  .prose .table-wrap{overflow-x:auto; margin:20px 0;}
  .prose table{border-collapse:collapse; width:100%; font-size:14px;}
  .prose th, .prose td{border:1px solid var(--border); padding:8px 12px; text-align:left;}
  .prose th{background:var(--bg-elev);}