:root {
    --bg: #ffffff;
    --bg-soft: #f6f7fb;
    --text: #0f172a;
    --muted: #556070;
    --line: #e5e7ef;
    --brand: #4f46e5;
    --brand-2: #7c3aed;
    --brand-soft: #eef0ff;
    --card: #ffffff;
    --ok: #059669; --ok-soft: #e7f8f1;
    --warn: #c2410c; --warn-soft: #fff1e7;
    --shadow: 0 24px 60px -24px rgba(30, 27, 75, .25);
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #0b0e17;
      --bg-soft: #121726;
      --text: #e8ebf4;
      --muted: #9aa3b5;
      --line: #232a3d;
      --brand: #8b85ff;
      --brand-2: #b18cff;
      --brand-soft: #1b1f3a;
      --card: #141a2b;
      --ok: #34d399; --ok-soft: #0f2a22;
      --warn: #fb923c; --warn-soft: #2d1a0e;
      --shadow: 0 24px 60px -24px rgba(0, 0, 0, .6);
    }
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0; background: var(--bg); color: var(--text);
    font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
    line-height: 1.65; -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  .wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

  /* Nav */
  header {
    position: sticky; top: 0; z-index: 20;
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
  }
  .nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
  .logo { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 20px; letter-spacing: -0.02em; }
  .logo-mark {
    width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
  }
  .nav-links { display: flex; gap: 28px; font-size: 15px; color: var(--muted); }
  .nav-links a:hover { color: var(--text); }
  .btn {
    display: inline-block; padding: 12px 22px; border-radius: 10px; border: 0; cursor: pointer;
    font: inherit; font-weight: 700; font-size: 15px; transition: transform .15s, opacity .15s;
  }
  .btn:hover { transform: translateY(-1px); }
  .btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; }
  .btn-ghost { border: 1px solid var(--line); background: var(--card); color: var(--text); }
  .nav .btn { padding: 9px 16px; font-size: 14px; }

  /* Hero */
  .hero { padding: 80px 0 88px; position: relative; overflow: hidden; }
  .hero::before {
    content: ""; position: absolute; inset: -30% -10% auto; height: 700px; z-index: -1;
    background: radial-gradient(closest-side, color-mix(in srgb, var(--brand) 16%, transparent), transparent);
  }
  .hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
  .badge {
    display: inline-block; padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
    background: var(--brand-soft); color: var(--brand); font-size: 13px; font-weight: 700;
  }
  h1 { font-size: clamp(38px, 5.6vw, 62px); line-height: 1.08; letter-spacing: -0.035em; margin: 0 0 20px; font-weight: 900; }
  .grad { background: linear-gradient(135deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .lead { font-size: clamp(16px, 2vw, 19px); color: var(--muted); max-width: 560px; margin: 0 0 32px; }
  .cta { display: flex; gap: 12px; flex-wrap: wrap; }
  .hero-note { margin-top: 18px; font-size: 13px; color: var(--muted); }

  /* Product mockup */
  .mock {
    background: var(--card); border: 1px solid var(--line); border-radius: 18px;
    box-shadow: var(--shadow); overflow: hidden; font-size: 13px;
  }
  .mock-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--bg-soft); }
  .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
  .mock-title { margin-left: 10px; font-weight: 600; color: var(--muted); }
  .mock-body { padding: 16px; }
  .mock-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 12px; }
  .mock-head strong { font-size: 15px; }
  .mock-head span { color: var(--muted); font-size: 12px; }
  .tx { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; }
  .tx .v { font-weight: 600; }
  .tx .a { font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
  .tx .meta { color: var(--muted); font-size: 12px; display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
  .chip { padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 700; }
  .chip.ok { background: var(--ok-soft); color: var(--ok); }
  .chip.warn { background: var(--warn-soft); color: var(--warn); }
  .chip.ai { background: var(--brand-soft); color: var(--brand); }
  .tx.flag { border-color: color-mix(in srgb, var(--warn) 45%, var(--line)); }
  .mock-sum { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
  .sum { background: var(--bg-soft); border-radius: 10px; padding: 10px 12px; }
  .sum small { display: block; color: var(--muted); font-size: 11px; }
  .sum b { font-size: 15px; font-variant-numeric: tabular-nums; }
  .mock-caption { text-align: center; color: var(--muted); font-size: 12px; margin-top: 12px; }

  /* Sections */
  section { padding: 88px 0; }
  .soft { background: var(--bg-soft); }
  .eyebrow { color: var(--brand); font-weight: 700; font-size: 13px; letter-spacing: 0.08em; margin-bottom: 10px; }
  h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.2; letter-spacing: -0.025em; margin: 0 0 16px; font-weight: 800; }
  .sub { color: var(--muted); font-size: 17px; max-width: 640px; margin: 0 0 48px; }
  .grid { display: grid; gap: 20px; }
  .g3 { grid-template-columns: repeat(3, 1fr); }
  .g2 { grid-template-columns: repeat(2, 1fr); }
  .g4 { grid-template-columns: repeat(4, 1fr); }
  .card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
  .card h3 { margin: 14px 0 8px; font-size: 19px; letter-spacing: -0.01em; }
  .card p { margin: 0; color: var(--muted); font-size: 15px; }
  .icon { width: 44px; height: 44px; border-radius: 12px; background: var(--brand-soft); color: var(--brand); display: grid; place-items: center; }
  .icon svg { width: 22px; height: 22px; }

  .pain { display: flex; gap: 14px; align-items: flex-start; }
  .pain .num { font-weight: 900; font-size: 28px; color: var(--brand); line-height: 1; min-width: 40px; }
  .pain h3 { margin-top: 0; }

  /* Audience */
  .aud h3 { margin-top: 0; font-size: 22px; }
  .aud .who { color: var(--brand); font-weight: 700; font-size: 13px; letter-spacing: .06em; }
  .checks { list-style: none; padding: 0; margin: 18px 0 0; }
  .checks li { position: relative; padding-left: 28px; margin-bottom: 10px; color: var(--muted); font-size: 15px; }
  .checks li::before {
    content: ""; position: absolute; left: 0; top: 4px; width: 18px; height: 18px; border-radius: 50%;
    background: var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237c3aed' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/12px no-repeat;
  }

  .step .n { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; font-weight: 800; }

  /* Principles */
  .principle h3 { margin-top: 0; font-size: 17px; }
  .principle p { font-size: 14px; }

  /* Roadmap */
  .road { position: relative; }
  .road .phase { font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: .06em; }
  .road .status { display: inline-block; margin-top: 14px; }
  .road h3 { margin-top: 6px; }
  .road.now { border-color: color-mix(in srgb, var(--brand) 55%, var(--line)); box-shadow: 0 0 0 3px var(--brand-soft); }

  /* FAQ */
  .faq { max-width: 820px; }
  details { border-bottom: 1px solid var(--line); padding: 18px 0; }
  summary { cursor: pointer; font-weight: 700; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
  summary::-webkit-details-marker { display: none; }
  summary::after { content: "+"; color: var(--brand); font-size: 22px; line-height: 1; transition: transform .2s; }
  details[open] summary::after { transform: rotate(45deg); }
  details p { color: var(--muted); margin: 12px 0 0; }

  /* Contact */
  .contact-box {
    background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff;
    border-radius: 24px; padding: 56px 32px; text-align: center;
  }
  .contact-box h2 { color: #fff; }
  .contact-box p { color: rgba(255,255,255,.88); margin: 0 auto 28px; max-width: 560px; }
  .contact-box .btn { background: #fff; color: #3b2fc9; }
  .mail { display: block; margin-top: 18px; font-size: 15px; color: rgba(255,255,255,.9); }

  footer { border-top: 1px solid var(--line); padding: 36px 0; color: var(--muted); font-size: 14px; }
  .foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
  .foot a:hover { color: var(--text); }

  @media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .g4 { grid-template-columns: repeat(2, 1fr); }
  }
  @media (max-width: 760px) {
    .g3, .g2, .g4 { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    section { padding: 64px 0; }
    .hero { padding: 48px 0 64px; }
    .mock-sum { grid-template-columns: 1fr 1fr; }
  }

/* Language switch */
.nav-right { display: flex; align-items: center; gap: 14px; }
.lang { font-size: 14px; color: var(--muted); display: flex; gap: 6px; }
.lang a { padding: 2px 4px; border-radius: 6px; }
.lang a:hover { color: var(--text); }
.lang a[aria-current="true"] { color: var(--text); font-weight: 700; }

/* Waitlist form */
.wl { display: flex; gap: 10px; max-width: 520px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.wl input[type="email"] {
  flex: 1 1 260px; min-width: 0; padding: 13px 16px; border-radius: 10px; border: 0;
  font: inherit; font-size: 15px; color: #0f172a; background: #fff;
}
.wl input[type="email"]:focus { outline: 3px solid rgba(255,255,255,.55); }
.wl .btn { flex: 0 0 auto; }
.wl .btn[disabled] { opacity: .7; cursor: wait; transform: none; }
.wl .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.wl-role { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin: 14px 0 0; font-size: 14px; color: rgba(255,255,255,.9); }
.wl-role label { display: flex; gap: 6px; align-items: center; cursor: pointer; }
.wl-msg { min-height: 24px; margin-top: 14px; font-size: 15px; font-weight: 600; }
.wl-msg.ok { color: #fff; }
.wl-msg.err { color: #ffe1e1; }
body.ko { font-family: "Noto Sans KR", "Inter", system-ui, sans-serif; word-break: keep-all; }
@media (max-width: 420px) {
  .nav-right .btn { display: none; }
}