@font-face{font-family:"Nunito";font-style:normal;font-weight:400;font-display:block;
    src:url(/fonts/nunito-400.woff2) format("woff2");}
  @font-face{font-family:"Nunito";font-style:normal;font-weight:700;font-display:block;
    src:url(/fonts/nunito-700.woff2) format("woff2");}
  @font-face{font-family:"Nunito";font-style:normal;font-weight:900;font-display:block;
    src:url(/fonts/nunito-900.woff2) format("woff2");}

  :root{
    --paper:#faf9f6; --card:#ffffff; --ink:#17151c; --ink-soft:#3a3646;
    --muted:#6f6b7a; --line:#e7e4ec; --line-2:#efedf3;
    --accent:#6c4ce0; --accent-d:#5a3ecb; --accent-w:#efeafc;
    --shadow:0 1px 2px rgba(23,21,28,.04), 0 12px 34px -18px rgba(23,21,28,.22);
    --sans:"Nunito",-apple-system,"Apple SD Gothic Neo","Segoe UI",Roboto,sans-serif;
    --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
    --maxw:1120px;
  }
  @media (prefers-color-scheme:dark){
    :root{
      --paper:#131118; --card:#1c1a24; --ink:#f3f1f7; --ink-soft:#c9c5d4;
      --muted:#948fa2; --line:#2b2833; --line-2:#252230;
      --accent:#8b6cf0; --accent-d:#7a5cea; --accent-w:#241f36;
      --shadow:0 1px 2px rgba(0,0,0,.4), 0 18px 40px -20px rgba(0,0,0,.6);
    }
  }
  :root[data-theme="light"]{
    --paper:#faf9f6; --card:#ffffff; --ink:#17151c; --ink-soft:#3a3646;
    --muted:#6f6b7a; --line:#e7e4ec; --line-2:#efedf3;
    --accent:#6c4ce0; --accent-d:#5a3ecb; --accent-w:#efeafc;
    --shadow:0 1px 2px rgba(23,21,28,.04), 0 12px 34px -18px rgba(23,21,28,.22);
  }
  :root[data-theme="dark"]{
    --paper:#131118; --card:#1c1a24; --ink:#f3f1f7; --ink-soft:#c9c5d4;
    --muted:#948fa2; --line:#2b2833; --line-2:#252230;
    --accent:#8b6cf0; --accent-d:#7a5cea; --accent-w:#241f36;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 18px 40px -20px rgba(0,0,0,.6);
  }

  *{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);
    font-weight:400;line-height:1.6;-webkit-font-smoothing:antialiased;
    font-size:17px;letter-spacing:-0.006em;}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
  a{color:inherit;}
  h1,h2,h3{font-weight:900;line-height:1.05;letter-spacing:-0.025em;text-wrap:balance;margin:0;}
  p{margin:0;}
  .eyebrow{font-family:var(--mono);font-size:12.5px;font-weight:700;letter-spacing:.14em;
    text-transform:uppercase;color:var(--accent);}

  /* ---- staff divider motif (5 lines = a music staff) ---- */
  .staff-rule{height:22px;background:
    repeating-linear-gradient(to bottom,transparent 0 4px,var(--line) 4px 5px);
    opacity:.9;margin:0;border:0;}

  /* ---- header ---- */
  header.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 86%,transparent);
    backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line);}
  .top .wrap{display:flex;align-items:center;gap:16px;height:66px;}
  .brand{display:inline-flex;align-items:center;gap:.34em;font-weight:900;font-size:26px;
    letter-spacing:-0.03em;text-decoration:none;color:var(--ink);}
  .brand svg{width:.92em;height:.92em;display:block;}
  .brand .roller-frame{stroke:var(--ink);}
  .brand .roller-handle{fill:var(--ink);}
  .top nav{margin-left:auto;display:flex;align-items:center;gap:8px;}
  .ghost{font-weight:700;font-size:15px;color:var(--ink-soft);text-decoration:none;
    padding:9px 12px;border-radius:10px;}
  .ghost:hover{color:var(--ink);background:var(--line-2);}
  .btn{font-family:var(--sans);font-weight:800;font-size:15px;cursor:pointer;
    border:0;border-radius:11px;padding:11px 18px;background:var(--accent);color:#fff;
    text-decoration:none;display:inline-flex;align-items:center;gap:8px;
    transition:transform .12s ease,background .12s ease;white-space:nowrap;}
  .btn:hover{background:var(--accent-d);transform:translateY(-1px);}
  .btn:active{transform:translateY(0);}
  .btn:focus-visible,.ghost:focus-visible,input:focus-visible{outline:2.5px solid var(--accent);
    outline-offset:2px;}

  /* ---- hero ---- */
  .hero{padding:78px 0 26px;}
  .hero .wrap{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center;}
  .hero h1{font-size:clamp(40px,5.4vw,64px);}
  .hero h1 .hl{color:var(--accent);}
  .lede{margin-top:22px;font-size:19.5px;color:var(--ink-soft);max-width:30ch;}
  .capture{margin-top:30px;display:flex;gap:10px;max-width:440px;}
  .capture input{flex:1;min-width:0;font-family:var(--sans);font-size:15.5px;color:var(--ink);
    background:var(--card);border:1.5px solid var(--line);border-radius:11px;padding:12px 14px;}
  .capture input::placeholder{color:var(--muted);}
  .microcopy{margin-top:11px;font-size:13.5px;color:var(--muted);}
  .microcopy b{color:var(--ink-soft);font-weight:700;}
  .capture.done .did{display:flex;}
  .did{display:none;align-items:center;gap:9px;font-weight:800;color:var(--accent);
    font-size:16px;padding:6px 0;}

  /* ---- score card visual ---- */
  .scorecard{background:var(--card);border:1px solid var(--line);border-radius:18px;
    box-shadow:var(--shadow);overflow:hidden;}
  .sc-tab{display:flex;align-items:center;gap:9px;padding:12px 16px;border-bottom:1px solid var(--line-2);
    font-family:var(--mono);font-size:12.5px;color:var(--muted);}
  .sc-dot{width:9px;height:9px;border-radius:50%;background:var(--line);}
  .sc-dot.on{background:var(--accent);}
  .sc-file{margin-left:auto;color:var(--ink-soft);}
  .sc-body{padding:26px 22px 24px;}
  .staff-wrap{position:relative;}
  .staff-svg{width:100%;height:auto;display:block;}
  .sc-caption{display:flex;justify-content:space-between;align-items:center;margin-top:18px;
    font-size:13.5px;color:var(--muted);}
  .chip{font-family:var(--mono);font-size:11.5px;font-weight:700;letter-spacing:.04em;
    color:var(--accent);background:var(--accent-w);border-radius:999px;padding:4px 10px;}

  .notehead{fill:var(--ink);transform-box:fill-box;transform-origin:center;}
  .playhead{stroke:var(--accent);stroke-width:2.4;}
  .glow{fill:var(--accent);opacity:0;}

  @keyframes sweep{from{transform:translateX(0);}to{transform:translateX(288px);}}
  @keyframes lightNote{0%{fill:var(--accent);}7%{fill:var(--accent);}22%,100%{fill:var(--ink);}}
  @keyframes lightGlow{0%{opacity:.5;}12%{opacity:0;}100%{opacity:0;}}
  .anim .playhead{animation:sweep 4.4s linear infinite;}
  .anim .notehead{animation:lightNote 4.4s linear infinite;}
  .anim .glow{animation:lightGlow 4.4s linear infinite;}

  /* ---- section shell ---- */
  section{padding:64px 0;}
  .sec-head{max-width:56ch;margin-bottom:40px;}
  .sec-head h2{font-size:clamp(28px,3.6vw,38px);}
  .sec-head p{margin-top:14px;color:var(--ink-soft);font-size:18px;}

  /* ---- steps ---- */
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
  .step{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 24px;}
  .step .n{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--accent);
    font-variant-numeric:tabular-nums;letter-spacing:.1em;}
  .step h3{font-size:20px;margin-top:14px;}
  .step p{margin-top:9px;color:var(--ink-soft);font-size:15.5px;}

  /* ---- features ---- */
  .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
  .feat{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px 22px;}
  .feat .ic{width:40px;height:40px;border-radius:11px;background:var(--accent-w);
    display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
  .feat .ic svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.9;
    stroke-linecap:round;stroke-linejoin:round;}
  .feat h3{font-size:17.5px;}
  .feat p{margin-top:8px;color:var(--ink-soft);font-size:14.5px;line-height:1.55;}

  /* ---- honesty strip ---- */
  .honest{background:#1a1723;color:#faf9f6;border:1px solid rgba(255,255,255,.08);
    border-radius:22px;padding:52px 44px;
    display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
  .honest h2{font-size:clamp(26px,3.2vw,34px);color:#fff;}
  .honest .body{color:rgba(255,255,255,.72);font-size:16.5px;margin-top:16px;line-height:1.6;}
  .honest .demo{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
    border-radius:14px;padding:20px;}
  .flagrow{display:flex;align-items:center;gap:12px;font-size:14.5px;padding:9px 0;
    color:rgba(255,255,255,.85);}
  .flagrow + .flagrow{border-top:1px solid rgba(255,255,255,.1);}
  .flag{width:26px;height:20px;border-radius:5px;flex:none;}
  .flag.warn{background:#ffd9e6;}
  .flag.ok{background:rgba(255,255,255,.16);}
  .flagrow .m{font-family:var(--mono);font-size:12px;color:rgba(255,255,255,.55);margin-left:auto;}

  /* ---- final cta ---- */
  .final{text-align:center;padding:74px 0 40px;}
  .final h2{font-size:clamp(30px,4.4vw,50px);}
  .final p{margin-top:16px;color:var(--ink-soft);font-size:18px;}
  .final .capture{margin:28px auto 0;}
  .final .microcopy{text-align:center;}

  footer{border-top:1px solid var(--line);padding:26px 0 46px;}
  footer .wrap{display:flex;align-items:center;gap:14px;flex-wrap:wrap;
    color:var(--muted);font-size:13.5px;}
  footer .brand{font-size:19px;}
  footer .sp{margin-left:auto;}

  @media (max-width:860px){
    .hero .wrap{grid-template-columns:1fr;gap:38px;}
    .lede{max-width:none;}
    .steps,.grid{grid-template-columns:1fr;}
    .honest{grid-template-columns:1fr;padding:38px 26px;}
    .hero{padding:52px 0 20px;}
    section{padding:50px 0;}
  }
  @media (prefers-reduced-motion:reduce){
    .anim .playhead,.anim .notehead,.anim .glow{animation:none;}
    .anim .notehead{fill:var(--ink);}
    .btn:hover{transform:none;}
  }

/* ---- language switch ---- */
.langsw{display:inline-flex;align-items:center;gap:2px;font-family:var(--mono);font-size:12.5px;
  font-weight:700;margin-right:2px;}
.langsw a{color:var(--muted);text-decoration:none;padding:6px 7px;border-radius:8px;}
.langsw a:hover{color:var(--ink);background:var(--line-2);}
.langsw a.on{color:var(--accent);}
.langsw .div{color:var(--line);}

/* ---- mobile: collapse header, tighten small screens ---- */
@media (max-width:720px){
  .top .wrap{height:60px;}
  .brand{font-size:23px;}
  .top nav .ghost{display:none;}      /* keep only EN/KO + CTA so header can't overflow */
  .top nav{gap:6px;}
  .top .btn{padding:10px 14px;font-size:14px;}
}
@media (max-width:520px){
  .wrap{padding:0 18px;}
  .hero{padding:40px 0 12px;}
  .hero h1{font-size:33px;}
  .hero .lede{font-size:16.5px;margin-top:16px;}
  .capture{flex-direction:column;}
  .capture .btn{width:100%;justify-content:center;}
  .sec-head h2{font-size:26px;}
  .final h2{font-size:30px;}
  .honest{padding:28px 20px;}
}
html,body{overflow-x:hidden;}          /* safety net against sideways scroll */