:root{
    --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
    --paper:#F7F8F4; --card:#FFFFFF; --ink:#1D2B4F; --ink2:#28407A; --ink-soft:#4A5578; --line:#D8DCCE;
    --green:#2F8F6E; --green-soft:#E4F2EB; --red:#C1443C; --red-soft:#FBE9E7; --amber:#D9622B;
    --blue:#2C7DA0; --blue-soft:#E4EFF3; --indigo:#5B4B8A; --indigo-soft:#ECE8F5;
    --gridline: rgba(29,43,79,0.045); --radius:14px; --opt-bg:var(--paper);
  }
  :root[data-theme="dark"]{
    --paper:#12141C; --card:#1B1E2B; --ink:#EDEFF7; --ink2:#8FB3FF; --ink-soft:#A9AFC7; --line:#2E3245;
    --green-soft:rgba(47,143,110,0.18); --red-soft:rgba(193,68,60,0.18);
    --blue-soft:rgba(44,125,160,0.18); --indigo-soft:rgba(91,75,138,0.22);
    --gridline: rgba(255,255,255,0.04); --opt-bg:#232842;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background:
      radial-gradient(circle at 12% 0%, rgba(217,98,43,0.06), transparent 40%),
      radial-gradient(circle at 88% 8%, rgba(44,125,160,0.07), transparent 42%),
      linear-gradient(var(--paper), var(--paper)),
      repeating-linear-gradient(0deg, transparent, transparent 27px, var(--gridline) 28px);
    color:var(--ink); font-family:var(--font-display); min-height:100vh;
    display:flex; justify-content:center; padding:78px 16px 0; overflow-x:hidden;
    transition:background .3s ease, color .3s ease;
  }
  .wrap{width:100%; max-width:720px; position:relative; padding-bottom:60px;}

  /* ---------- settings ---------- */
  .settings-btn{position:fixed; top:16px; left:16px; z-index:120; width:44px; height:44px; border-radius:50%; background:var(--card); border:1px solid var(--line); cursor:pointer; display:flex; align-items:center; justify-content:center; box-shadow:0 4px 14px rgba(29,43,79,0.12); transition:transform .3s ease, box-shadow .2s ease;}
  .settings-btn:hover{box-shadow:0 6px 18px rgba(29,43,79,0.18);}
  .settings-btn.spin svg{animation:spin360 .5s ease;}
  @keyframes spin360{to{transform:rotate(180deg);}}
  .settings-btn svg{width:22px; height:22px; stroke:var(--ink); fill:none; stroke-width:2;}

  .settings-panel{position:fixed; top:66px; left:16px; z-index:120; width:220px; background:var(--card); border:1px solid var(--line); border-radius:14px; padding:16px; box-shadow:0 16px 40px rgba(29,43,79,0.18); opacity:0; transform:translateY(-8px) scale(.96); pointer-events:none; transition:opacity .2s ease, transform .22s cubic-bezier(.3,.9,.3,1.3);}
  .settings-panel.open{opacity:1; transform:translateY(0) scale(1); pointer-events:auto;}
  .settings-group{margin-bottom:14px;}
  .settings-group:last-child{margin-bottom:0;}
  .settings-label{font-family:var(--font-mono); font-size:10.5px; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-soft); margin-bottom:8px; font-weight:600;}
  .lang-row, .theme-row{display:grid; grid-template-columns:1fr 1fr; gap:6px;}
  .lang-btn, .theme-btn{font-family:var(--font-display); font-size:12.5px; font-weight:500; color:var(--ink); background:var(--paper); border:1.5px solid var(--line); border-radius:8px; padding:7px 6px; cursor:pointer; transition:all .15s ease;}
  .lang-btn:hover, .theme-btn:hover{border-color:var(--ink-soft);}
  .lang-btn.active, .theme-btn.active{background:var(--ink); color:var(--paper); border-color:var(--ink);}

  /* ---------- header / brand ---------- */
  .site-header{text-align:center; margin-bottom:6px;}
  .brand-name{font-family:var(--font-display); font-weight:700; font-size:clamp(26px,6vw,36px); letter-spacing:.02em; color:var(--ink);}
  .blood-wrap{position:relative; display:inline-block; padding-bottom:10px;}
  .blood-text{background:linear-gradient(180deg, #E23A34 0%, #9A1015 65%, #5C070B 100%); -webkit-background-clip:text; background-clip:text; color:transparent; font-weight:700; filter:drop-shadow(0 2px 1px rgba(94,8,10,0.35));}
  .blood-red-text{color:#F16C67; font-weight:700;}
  .blood-wrap::before, .blood-wrap::after{content:""; position:absolute; bottom:-2px; width:6px; height:10px; background:linear-gradient(180deg, #C21F26, #6E0C10); border-radius:50% 50% 45% 45% / 60% 60% 40% 40%;}
  .blood-wrap::before{left:26%; animation:dripGrow 3s ease-in-out infinite;}
  .blood-wrap::after{left:66%; animation:dripGrow 3.6s ease-in-out infinite .8s;}
  @keyframes dripGrow{0%,55%{height:7px; opacity:.65;}80%{height:15px; opacity:1;}100%{height:7px; opacity:.65;}}
  .brand-sub{font-family:var(--font-mono); font-size:13px; letter-spacing:.04em; margin-top:2px;}

  /* ---------- nav menu ---------- */
  .menu{display:flex; flex-wrap:wrap; justify-content:center; gap:7px; margin:20px 0 28px;}
  .menu-btn{background:transparent; border:1.5px solid var(--line); color:var(--ink-soft); font-family:var(--font-display); font-weight:600; font-size:12.5px; padding:9px 15px; border-radius:999px; cursor:pointer; transition:all .2s ease;}
  .menu-btn:hover{border-color:var(--ink-soft); color:var(--ink); transform:translateY(-1px);}
  .menu-btn.active{background:var(--ink); color:var(--paper); border-color:var(--ink); box-shadow:0 4px 14px rgba(29,43,79,.25);}

  .view{display:none; animation:viewIn .35s cubic-bezier(.2,.85,.3,1) both;}
  .view.active{display:block;}
  @keyframes viewIn{0%{opacity:0; transform:translateY(8px);}100%{opacity:1; transform:translateY(0);}}

  /* ---------- hero ---------- */
  .hero{position:relative; text-align:center; padding:26px 10px 34px; overflow:hidden; border-radius:18px;}
  .hero-flask{width:150px; height:auto; display:block; margin:0 auto 6px; position:relative; z-index:1;}
  .bubble{animation:bubbleRise 3s ease-in infinite;}
  .b2{animation-delay:.6s;} .b3{animation-delay:1.2s;} .b4{animation-delay:1.8s;}
  @keyframes bubbleRise{0%{transform:translateY(0); opacity:.6;}80%{opacity:.4;}100%{transform:translateY(-70px); opacity:0;}}
  .hero-title{font-family:var(--font-display); font-size:clamp(28px,7vw,42px); font-weight:700; position:relative; z-index:1;}
  .hero-sub{color:var(--ink-soft); font-size:15px; line-height:1.55; max-width:440px; margin:12px auto 22px; position:relative; z-index:1;}
  .hero-cta{position:relative; z-index:1;}

  @media (prefers-reduced-motion: reduce){ .bubble, .blood-wrap::before, .blood-wrap::after{animation:none !important;} }

  /* ---------- shared card / quiz styles ---------- */
  .eyebrow{font-family:var(--font-mono); font-size:12px; letter-spacing:0.14em; text-transform:uppercase; color:var(--amber); font-weight:600;}
  .section-head{text-align:center; margin-bottom:20px;}
  .section-title{font-family:var(--font-display); font-size:clamp(22px,5vw,28px); margin:6px 0 4px; color:var(--ink);}
  .section-sub{color:var(--ink-soft); font-size:14px;}

  .progress{display:flex; gap:5px; justify-content:center; flex-wrap:wrap; margin:0 0 24px;}
  .dot{width:9px;height:9px;border-radius:50%; background:var(--line); transition:background .2s ease;}
  .dot.current{transform:scale(1.4); background:var(--ink-soft);}
  .dot.pop{animation:dotPop .35s ease;}
  .dot.correct{background:var(--green);}
  .dot.wrong{background:var(--red);}
  @keyframes dotPop{0%{transform:scale(1);}45%{transform:scale(1.9);}100%{transform:scale(1);}}

  .card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:28px 26px; box-shadow:0 1px 2px rgba(29,43,79,0.05); transition:opacity .18s ease, transform .18s ease, background .3s ease, border-color .3s ease;}
  .card.fading{opacity:0; transform:translateY(6px);}

  .stats{display:flex; justify-content:space-between; font-family:var(--font-mono); font-size:12px; color:var(--ink-soft); margin-bottom:16px;}
  .stats b{color:var(--ink); display:inline-block;}
  .stats b.bump{animation:bump .3s ease;}
  @keyframes bump{0%{transform:scale(1);}40%{transform:scale(1.35); color:var(--green);}100%{transform:scale(1);}}

  .kind-tag{display:inline-block; font-family:var(--font-mono); font-size:10.5px; font-weight:600; letter-spacing:.08em; text-transform:uppercase; color:var(--amber); background:var(--red-soft); border:1px solid var(--amber); border-radius:20px; padding:3px 10px; margin-bottom:14px;}

  .label-area{display:flex; align-items:center; justify-content:center; gap:10px; padding:18px 10px 14px; margin-bottom:14px; flex-wrap:wrap;}
  .pictogram{width:80px; height:80px; flex-shrink:0; overflow:visible;}
  .pictogram.small{width:58px; height:58px;}
  .pictogram.enter{animation:pictoIn .45s cubic-bezier(.2,.9,.3,1.35) both;}
  @keyframes pictoIn{0%{opacity:0; transform:scale(.4) rotate(-18deg);}100%{opacity:1; transform:scale(1) rotate(0deg);}}
  /* Pictograms are always a white diamond with a red border and BLACK artwork,
     regardless of site theme — this matches the real GHS standard and keeps
     the icons visible in dark mode. Never bind this fill to a theme variable. */
  .diamond{fill:#ffffff; stroke:#C1443C; stroke-width:6;}

  .ico-flame{transform-origin:50% 68px; animation:flicker 1.6s ease-in-out infinite alternate;}
  @keyframes flicker{0%{transform:scale(1,1) rotate(0deg);}50%{transform:scale(1.04,1.07) rotate(-1.5deg);}100%{transform:scale(0.98,1.03) rotate(1.5deg);}}
  .ico-explosive-burst{transform-origin:46px 58px; animation:burstPulse 1.3s ease-in-out infinite;}
  @keyframes burstPulse{0%,100%{transform:scale(1); opacity:1;}50%{transform:scale(1.12); opacity:.75;}}
  .ico-spark{animation:sparkFlicker .5s steps(2) infinite;}
  @keyframes sparkFlicker{0%,100%{opacity:1;}50%{opacity:.3;}}
  .drop{animation:drip 1.8s ease-in infinite;}
  .drop-r{animation-delay:.6s;}
  @keyframes drip{0%{transform:translateY(0); opacity:1;}70%{opacity:1;}100%{transform:translateY(14px); opacity:0;}}
  .ico-skull{transform-origin:50px 55px; animation:sway 3s ease-in-out infinite;}
  @keyframes sway{0%,100%{transform:rotate(-2.5deg);}50%{transform:rotate(2.5deg);}}
  .ico-gas{transform-origin:50px 50px; animation:pressure 1.4s ease-in-out infinite;}
  @keyframes pressure{0%,100%{transform:scale(1);}50%{transform:scale(1.035);}}
  .ico-burst-star{transform-origin:50px 55px; animation:burstPulse 1.1s ease-in-out infinite;}
  .ico-wave{animation:waveFlow 2.6s linear infinite;}
  @keyframes waveFlow{0%{stroke-dashoffset:0;}100%{stroke-dashoffset:-24;}}
  .ico-fish{animation:fishBob 2.2s ease-in-out infinite;}
  @keyframes fishBob{0%,100%{transform:translateY(0);}50%{transform:translateY(-2.5px);}}
  .ico-exclaim{transform-origin:50px 50px; animation:pulseSlow 1.8s ease-in-out infinite;}
  @keyframes pulseSlow{0%,100%{transform:scale(1);}50%{transform:scale(1.06);}}

  @media (prefers-reduced-motion: reduce){
    .pictogram.enter, .ico-flame, .ico-explosive-burst, .ico-spark, .drop, .ico-skull,
    .ico-gas, .ico-burst-star, .ico-wave, .ico-fish, .ico-exclaim, .dot.pop, .stats b.bump{animation:none !important;}
  }

  .product-name{text-align:center; font-family:var(--font-display); font-weight:600; font-size:17px; margin-bottom:16px; color:var(--ink);}
  .prompt{font-size:15px; line-height:1.45; text-align:center; margin-bottom:20px; padding:0 4px; color:var(--ink);}

  .options{display:flex; flex-direction:column; gap:10px; margin-bottom:8px;}
  .opt{font-family:var(--font-display); font-size:14px; font-weight:500; color:var(--ink); background:var(--opt-bg); border:1.5px solid var(--line); border-radius:10px; padding:13px 16px; text-align:left; cursor:pointer; line-height:1.4; transition:border-color .15s ease, background .15s ease, transform .1s ease, box-shadow .15s ease; position:relative; overflow:hidden;}
  .opt:hover:not(:disabled){border-color:var(--ink-soft); transform:translateY(-1px);}
  .opt:focus-visible{outline:2px solid var(--ink); outline-offset:2px;}
  .opt:disabled{cursor:default;}
  .opt.correct{background:var(--green-soft); border-color:var(--green); color:var(--green); animation:correctPop .35s ease;}
  .opt.wrong{background:var(--red-soft); border-color:var(--red); color:var(--red); animation:shake .4s ease;}
  .opt.fade{opacity:.45;}
  @keyframes correctPop{0%{transform:scale(1);}40%{transform:scale(1.025); box-shadow:0 0 0 4px var(--green-soft);}100%{transform:scale(1);}}
  @keyframes shake{0%,100%{transform:translateX(0);}20%{transform:translateX(-6px);}40%{transform:translateX(5px);}60%{transform:translateX(-4px);}80%{transform:translateX(3px);}}
  @media (prefers-reduced-motion: reduce){ .opt.correct, .opt.wrong{animation:none;} }

  .explain{margin-top:16px; padding-top:16px; border-top:1px dashed var(--line); font-size:14px; line-height:1.55; color:var(--ink-soft); max-height:0; opacity:0; overflow:hidden; transition:max-height .35s ease, opacity .3s ease, margin-top .35s ease, padding-top .35s ease;}
  .explain.show{max-height:240px; opacity:1;}
  .explain b{color:var(--ink);}

  .next-row{margin-top:20px; display:flex; justify-content:flex-end; height:0; overflow:hidden; opacity:0; transition:opacity .2s ease, height .2s ease;}
  .next-row.show{height:44px; opacity:1;}
  .btn{font-family:var(--font-display); font-weight:600; font-size:14px; color:#fff; background:linear-gradient(135deg, #1D2B4F, #28407A); border:none; border-radius:9px; padding:11px 20px; cursor:pointer; transition:opacity .15s ease, transform .1s ease, box-shadow .15s ease;}
  .btn:hover{opacity:.92; transform:translateY(-1px); box-shadow:0 6px 16px rgba(29,43,79,0.25);}
  .btn:active{transform:translateY(0);}
  .btn:focus-visible{outline:2px solid var(--ink); outline-offset:2px;}

  .summary{text-align:center; position:relative;}
  .summary .big{font-family:var(--font-display); font-size:44px; font-weight:700; margin:10px 0 4px; animation:pictoIn .5s cubic-bezier(.2,.9,.3,1.35) both; color:var(--ink);}
  .summary .big span{color:var(--green);}
  .summary p{color:var(--ink-soft); font-size:14px; margin-bottom:22px;}

  .legend{margin-top:26px; border-top:1px solid var(--line); padding-top:18px;}
  .legend summary{cursor:pointer; font-family:var(--font-display); font-weight:600; font-size:13px; color:var(--ink-soft);}
  .legend-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:14px;}
  @media (max-width:460px){ .legend-grid{grid-template-columns:repeat(2,1fr);} }
  .legend-item{text-align:center;}
  .legend-item .pictogram{width:44px; height:44px;}
  .legend-item div{font-size:10.5px; color:var(--ink-soft); margin-top:5px; line-height:1.3;}

  .confetti{position:fixed; top:-10px; width:8px; height:14px; z-index:80; pointer-events:none; border-radius:2px;}
  @keyframes fall{0%{transform:translateY(0) rotate(0deg); opacity:1;}100%{transform:translateY(100vh) rotate(540deg); opacity:0;}}

  /* ---------- equipment accordion ---------- */
  .eq-intro{text-align:center; color:var(--ink-soft); font-size:14px; margin-bottom:20px;}
  .equip-list{display:flex; flex-direction:column; gap:10px;}
  .equip-cat{background:var(--card); border:1px solid var(--line); border-radius:14px; overflow:hidden; transition:border-color .2s ease;}
  .equip-cat.open{border-color:var(--cat-color, var(--ink-soft));}
  .equip-head{display:flex; align-items:center; gap:12px; padding:14px 16px; cursor:pointer; user-select:none; background:none; border:none; width:100%; text-align:left; font-family:inherit;}
  .equip-icon{width:36px; height:36px; border-radius:50%; display:flex; align-items:center; justify-content:center; flex-shrink:0;}
  .equip-icon svg{width:19px; height:19px;}
  .equip-titlewrap{flex:1; min-width:0;}
  .equip-num{font-family:var(--font-mono); font-size:10px; color:var(--ink-soft);}
  .equip-title{font-family:var(--font-display); font-weight:600; font-size:14px; line-height:1.3; color:var(--ink);}
  .equip-count{font-family:var(--font-mono); font-size:10.5px; color:var(--ink-soft); flex-shrink:0;}
  .equip-chevron{width:16px; height:16px; stroke:var(--ink-soft); fill:none; stroke-width:2.2; transition:transform .3s ease; flex-shrink:0;}
  .equip-cat.open .equip-chevron{transform:rotate(180deg);}
  .equip-body{max-height:0; overflow:hidden; transition:max-height .4s ease;}
  .equip-cat.open .equip-body{max-height:1200px;}
  .equip-chips{display:flex; flex-wrap:wrap; gap:7px; padding:2px 16px 16px;}
  .chip{background:var(--opt-bg); border:1px solid var(--line); border-radius:8px; padding:6px 10px; font-size:12px; color:var(--ink); line-height:1.3;}

  /* ---------- about ---------- */
  .about-body{font-size:15px; line-height:1.7; color:var(--ink-soft);}
  .about-signoff{margin-top:22px; font-family:var(--font-mono); font-size:12px; color:var(--ink-soft);}

  /* ---------- modal (privacy) ---------- */
  .modal-overlay{position:fixed; inset:0; background:rgba(10,12,20,0.45); backdrop-filter:blur(3px); display:flex; align-items:center; justify-content:center; padding:20px; opacity:0; pointer-events:none; transition:opacity .25s ease; z-index:100;}
  .modal-overlay.open{opacity:1; pointer-events:auto;}
  .modal{background:var(--card); border-radius:18px; max-width:400px; width:100%; padding:30px 26px 26px; position:relative; text-align:center; transform:scale(.75) translateY(10px); opacity:0; transition:transform .38s cubic-bezier(.2,.85,.3,1.4), opacity .25s ease; box-shadow:0 24px 60px rgba(10,12,20,0.35); max-height:80vh; overflow-y:auto;}
  .modal-overlay.open .modal{transform:scale(1) translateY(0); opacity:1;}
  .modal-close{position:absolute; top:14px; right:14px; width:30px; height:30px; border-radius:50%; border:none; background:var(--opt-bg); color:var(--ink-soft); font-size:16px; cursor:pointer; transition:background .15s ease, color .15s ease, transform .15s ease;}
  .modal-close:hover{background:var(--line); color:var(--ink); transform:rotate(90deg);}
  .modal-title{font-family:var(--font-display); font-weight:700; font-size:20px; margin-bottom:10px; color:var(--ink);}
  .modal-desc{font-size:14px; line-height:1.6; color:var(--ink-soft); text-align:center;}

  @media (prefers-reduced-motion: reduce){ .modal, .modal-overlay{animation:none !important; transition:none !important;} }

  /* ---------- footer ---------- */
  .site-footer{margin-top:50px; padding-top:22px; border-top:1px solid var(--line); text-align:center; display:flex; flex-direction:column; gap:8px; align-items:center;}
  .footer-link{background:none; border:none; color:var(--ink-soft); font-family:var(--font-mono); font-size:12px; text-decoration:underline; cursor:pointer; padding:0;}
  .footer-link:hover{color:var(--ink);}
  .footer-copy{font-family:var(--font-mono); font-size:11px; color:var(--ink-soft);}