:root {
    --bg: #FAFAF9;
    --surface: #FFFFFF;
    --surface-raised: #F3F3F1;
    --text: #1C1C1E;
    --text-secondary: #6B6B70;
    --border: #E4E4E1;
    --accent: #2F5D5A;
    --accent-soft: #E4EEEC;
    --radius: 14px;
    --capsule-radius: 999px;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #0C0E11;
      --surface: #15181C;
      --surface-raised: #1B1F24;
      --text: #F0F1F0;
      --text-secondary: #9A9DA1;
      --border: #272B31;
      --accent: #6FBBB3;
      --accent-soft: #17282A;
    }
  }

  * { box-sizing: border-box; }

  html {
    -webkit-text-size-adjust: 100%;
  }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
  }

  .wrap {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ---------- Header ---------- */

  header.hero {
    padding: 72px 0 48px;
    text-align: center;
  }

  .mark {
    width: 56px;
    height: 34px;
    margin: 0 auto 28px;
    border-radius: var(--capsule-radius);
    background: linear-gradient(135deg, var(--accent), var(--accent-soft));
    position: relative;
    box-shadow: 0 1px 0 rgba(0,0,0,0.04);
  }
  .mark::after {
    content: "";
    position: absolute;
    inset: 6px 6px 6px auto;
    width: 12px;
    border-radius: var(--capsule-radius);
    background: var(--surface);
    opacity: 0.55;
  }

  h1 {
    font-size: clamp(28px, 5vw, 36px);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 10px;
  }

  .subtitle {
    color: var(--text-secondary);
    font-size: 17px;
    margin: 0;
    font-weight: 450;
  }

  /* ---------- Sections ---------- */

  section {
    padding: 40px 0;
    border-top: 1px solid var(--border);
  }

  .eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 5px 14px;
    border-radius: var(--capsule-radius);
    margin-bottom: 18px;
  }

  h2 {
    font-size: 22px;
    font-weight: 650;
    letter-spacing: -0.01em;
    margin: 0 0 18px;
  }

  /* ---------- FAQ ---------- */

  .faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    margin-bottom: 10px;
    overflow: hidden;
  }

  .faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 16px 20px;
    font-weight: 550;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .faq-item summary::-webkit-details-marker { display: none; }

  .faq-item summary::after {
    content: "+";
    flex: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--surface-raised);
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 22px;
    text-align: center;
    transition: transform 0.15s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
  }

  .faq-item .body {
    padding: 0 20px 18px;
    color: var(--text-secondary);
    font-size: 15px;
  }

  .faq-item .body p { margin: 0 0 10px; }
  .faq-item .body p:last-child { margin-bottom: 0; }
  .faq-item .body code {
    background: var(--surface-raised);
    padding: 2px 6px;
    border-radius: 5px;
    font-size: 13px;
  }

  /* ---------- Contact ---------- */

  .contact-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
  }

  .contact-card p {
    margin: 4px 0 0;
    color: var(--text-secondary);
    font-size: 14px;
  }

  .btn {
    display: inline-block;
    background: var(--accent);
    color: var(--bg);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    padding: 11px 22px;
    border-radius: var(--capsule-radius);
    white-space: nowrap;
  }

  @media (prefers-color-scheme: dark) {
    .btn { color: #0C0E11; }
  }

  /* ---------- Privacy ---------- */

  .privacy-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
  }

  .privacy-list li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    font-size: 15px;
    color: var(--text-secondary);
  }

  .privacy-list li .dot {
    flex: none;
    width: 8px;
    height: 8px;
    margin-top: 7px;
    border-radius: 50%;
    background: var(--accent);
  }

  .privacy-list li strong {
    color: var(--text);
  }

  /* ---------- Footer ---------- */

  footer {
    padding: 32px 0 56px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    border-top: 1px solid var(--border);
  }

  footer p { margin: 4px 0; }

  a { color: var(--accent); }

  @media (max-width: 480px) {
    header.hero { padding: 56px 0 36px; }
    section { padding: 32px 0; }
    .contact-card { flex-direction: column; align-items: flex-start; }
    .btn { width: 100%; text-align: center; }
  }