:root {
      --navy: #0E1222;
      --purple: #5147E5;
      --purple-hover: #4238C9;
      --green: #2EE6A6;
      --bg: #F5F5F8;
      --surface: #FFFFFF;
      --text: #0E1222;
      --muted: #545B70;
      --border: #E2E3EA;
      --soft: #ECEBFC;
      --danger: #B4231A;
      --danger-soft: #FDECEA;
      --ok: #136B4A;
      --ok-soft: #E3F8EF;
      --radius: 14px;
      --shadow: 0 10px 30px rgba(14, 18, 34, .08);
    }
    @media (prefers-color-scheme: dark) {
      :root {
        --bg: #0B0E1A;
        --surface: #141829;
        --text: #EEF0F7;
        --muted: #A3A9BD;
        --border: #262B40;
        --soft: #1E2040;
        --danger: #FF8A80;
        --danger-soft: #3A1714;
        --ok: #5FE3B0;
        --ok-soft: #0F2C22;
        --shadow: 0 10px 30px rgba(0, 0, 0, .35);
      }
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0; background: var(--bg); color: var(--text);
      font: 16px/1.6 "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
    }
    a { color: inherit; }
    img { max-width: 100%; display: block; }
    .wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

    /* Header */
    header { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(10px);
      background: color-mix(in srgb, var(--bg) 85%, transparent); border-bottom: 1px solid var(--border); }
    .nav { display: flex; align-items: center; gap: 24px; height: 64px; }
    .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; text-decoration: none; }
    .brand img { width: 32px; height: 32px; }
    .nav nav { margin-left: auto; display: flex; gap: 20px; font-size: 15px; }
    .nav nav a { text-decoration: none; color: var(--muted); }
    .nav nav a:hover { color: var(--text); }

    .btn { display: inline-flex; align-items: center; gap: 10px; padding: 12px 22px; border-radius: 10px;
      font-weight: 600; text-decoration: none; border: 1px solid transparent; cursor: pointer; font-size: 16px; }
    .btn-primary { background: var(--purple); color: #fff; }
    .btn-primary:hover { background: var(--purple-hover); }
    .btn-ghost { border-color: var(--border); background: var(--surface); }
    .btn-ghost:hover { border-color: var(--purple); }
    .btn:focus-visible, a:focus-visible, input:focus-visible { outline: 3px solid var(--green); outline-offset: 2px; }

    /* Hero */
    .hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; padding: 72px 0 56px; }
    .eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
      color: var(--purple); background: var(--soft); padding: 4px 10px; border-radius: 999px; }
    @media (prefers-color-scheme: dark) { .eyebrow { color: #B9B4FF; } }
    h1 { font-size: clamp(34px, 5vw, 54px); line-height: 1.08; margin: 16px 0; letter-spacing: -.02em; }
    h1 mark { background: none; color: var(--purple); }
    @media (prefers-color-scheme: dark) { h1 mark { color: #9C95FF; } }
    .lead { font-size: 19px; color: var(--muted); max-width: 560px; }
    .actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 12px; }
    .meta { color: var(--muted); font-size: 14px; }
    .hero-art { display: grid; place-items: center; }
    .hero-art .tile { width: min(260px, 70vw); aspect-ratio: 1; border-radius: 28%; background: var(--navy);
      display: grid; place-items: center; box-shadow: var(--shadow); }
    .hero-art .tile img { width: 58%; }

    section { padding: 56px 0; }
    h2 { font-size: clamp(26px, 3.4vw, 36px); margin: 0 0 10px; letter-spacing: -.01em; }
    .section-lead { color: var(--muted); margin: 0 0 32px; max-width: 680px; }

    /* Features */
    .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
    .card h3 { margin: 10px 0 6px; font-size: 18px; }
    .card p { margin: 0; color: var(--muted); font-size: 15px; }
    .icon { width: 40px; height: 40px; border-radius: 10px; background: var(--soft); display: grid; place-items: center; }
    .icon svg { width: 22px; height: 22px; stroke: var(--purple); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
    @media (prefers-color-scheme: dark) { .icon svg { stroke: #A9A3FF; } }

    /* Steps */
    .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; }
    .step { position: relative; padding-top: 52px; }
    .step::before { counter-increment: step; content: counter(step); position: absolute; top: 0; left: 0; width: 38px; height: 38px;
      border-radius: 50%; background: var(--green); color: var(--navy); font-weight: 800; display: grid; place-items: center; }
    .step h3 { margin: 0 0 6px; }
    .step p { margin: 0; color: var(--muted); }

    /* Screens */
    .tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
    .tabs button { font: inherit; padding: 8px 16px; border-radius: 999px; border: 1px solid var(--border);
      background: var(--surface); color: var(--text); cursor: pointer; }
    .tabs button[aria-selected="true"] { background: var(--purple); border-color: var(--purple); color: #fff; }
    .shot { max-width: 760px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
      box-shadow: var(--shadow); background: var(--surface); }
    .shot img { width: 100%; height: auto; }

    /* Safety */
    .safety { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .check { display: flex; gap: 12px; align-items: flex-start; }
    .check span { flex: none; width: 24px; height: 24px; border-radius: 50%; background: var(--ok-soft); color: var(--ok);
      display: grid; place-items: center; font-weight: 800; font-size: 14px; margin-top: 2px; }

    /* Download */
    .download { background: var(--navy); color: #fff; border-radius: 24px; padding: 48px; display: grid;
      grid-template-columns: 1fr auto; gap: 24px; align-items: center; }
    .download p { color: #C3C7D6; margin: 6px 0 0; }
    .download .btn-primary { background: var(--green); color: var(--navy); }
    .download .btn-primary:hover { background: #22CC92; }
    .req { margin-top: 18px; font-size: 14px; color: #A9AEC2; }

    details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin-bottom: 10px; }
    summary { cursor: pointer; font-weight: 600; }
    details p { color: var(--muted); margin: 10px 0 0; }

    footer { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
    footer .wrap { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }

    /* Account callback (email confirmation, new password) */
    .overlay { position: fixed; inset: 0; background: rgba(8, 10, 20, .55); display: none; place-items: center; padding: 16px; z-index: 50; }
    .overlay.open { display: grid; }
    .dialog { width: min(440px, 100%); background: var(--surface); border-radius: 18px; padding: 28px; box-shadow: var(--shadow); }
    .dialog img { width: 72px; margin: 0 auto 12px; }
    .dialog h2 { font-size: 22px; text-align: center; }
    .dialog p { color: var(--muted); text-align: center; margin: 6px 0 16px; }
    .dialog label { display: block; font-weight: 600; font-size: 14px; margin: 12px 0 6px; }
    .dialog input { width: 100%; font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border);
      background: var(--bg); color: var(--text); }
    .dialog .btn { width: 100%; justify-content: center; margin-top: 18px; }
    .alert { border-radius: 10px; padding: 10px 12px; font-size: 14px; margin-top: 12px; display: none; }
    .alert.show { display: block; }
    .alert.error { background: var(--danger-soft); color: var(--danger); }
    .alert.ok { background: var(--ok-soft); color: var(--ok); }

    /* Header account button */
    .nav .account-link { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 10px;
      border: 1px solid var(--border); background: var(--surface); text-decoration: none; font-size: 15px; font-weight: 600;
      max-width: 220px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .nav .account-link:hover { border-color: var(--purple); }
    .nav nav a[aria-current="page"] { color: var(--text); font-weight: 600; }

    /* Account page */
    .account { padding: 48px 0 72px; }
    .panel { width: min(440px, 100%); margin: 0 auto; background: var(--surface); border: 1px solid var(--border);
      border-radius: 18px; padding: 28px; box-shadow: var(--shadow); }
    .panel h1 { font-size: 26px; text-align: center; margin: 4px 0 6px; }
    .panel .sub { color: var(--muted); text-align: center; margin: 0 0 18px; font-size: 15px; }
    .panel .mark { width: 64px; margin: 0 auto 10px; }
    .field { display: block; margin: 12px 0 0; }
    .field span { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
    .field input, select { width: 100%; font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border);
      background: var(--bg); color: var(--text); }
    .check-row { display: flex; align-items: center; gap: 8px; margin-top: 12px; font-size: 14px; color: var(--muted); }
    .panel .btn { width: 100%; justify-content: center; margin-top: 18px; }
    .links { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 16px; margin-top: 16px; font-size: 14px; }
    .linkbtn { background: none; border: 0; padding: 4px 0; font: inherit; color: var(--purple); cursor: pointer; text-decoration: underline; }
    @media (prefers-color-scheme: dark) { .linkbtn { color: #A9A3FF; } }
    .profile { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 6px 0 4px; font-size: 15px; }
    .profile dt { color: var(--muted); }
    .profile dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
    .badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 13px; font-weight: 700; background: var(--soft); color: var(--purple); }
    @media (prefers-color-scheme: dark) { .badge { color: #B9B4FF; } }
    .badge.ok { background: var(--ok-soft); color: var(--ok); }
    .badge.wait { background: var(--danger-soft); color: var(--danger); }

    .users { margin-top: 32px; }
    .users h2 { font-size: 24px; }
    .users .toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; justify-content: space-between; margin-bottom: 12px; }
    .new-user { display: flex; flex-wrap: wrap; gap: 8px; align-items: end; }
    .new-user .field { margin: 0; }
    .new-user input, .new-user select { width: auto; min-width: 170px; }
    .table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
    .table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; vertical-align: middle; }
    .table th { color: var(--muted); font-weight: 600; background: var(--bg); }
    .table tr:last-child td { border-bottom: 0; }
    .table td.email { overflow-wrap: anywhere; font-weight: 600; }
    .table .row-actions { display: flex; flex-wrap: wrap; gap: 6px; }
    .table .row-actions select { width: auto; padding: 6px 8px; }
    .btn-sm { padding: 6px 12px; font-size: 14px; border-radius: 8px; width: auto !important; margin: 0 !important; }
    .muted { color: var(--muted); }

    @media (max-width: 860px) {
      .hero, .download { grid-template-columns: 1fr; }
      .hero { padding-top: 40px; }
      .hero-art { order: -1; }
      .hero-art .tile { width: min(160px, 45vw); }
      .table thead { display: none; }
      .table tr { display: block; border-bottom: 1px solid var(--border); padding: 8px 0; }
      .table td { display: block; border: 0; padding: 4px 12px; }
      .grid, .steps, .safety { grid-template-columns: 1fr; }
      .download { padding: 28px; }
      .nav nav { display: none; }
    }