:root {
            --bg: #06131b;
            --panel: rgba(8, 22, 31, 0.93);
            --text: #eff8ff;
            --muted: #a9c4d4;
            --cyan: #17c9ff;
            --green: #65d340;
            --orange: #f47628;
            --line: rgba(23, 201, 255, 0.28);
        }

        * { box-sizing: border-box; }

        body {
            margin: 0;
            min-height: 100vh;
            color: var(--text);
            font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.65;
            background:
                linear-gradient(rgba(23, 201, 255, 0.045) 1px, transparent 1px),
                linear-gradient(90deg, rgba(23, 201, 255, 0.045) 1px, transparent 1px),
                radial-gradient(circle at top left, rgba(23, 201, 255, 0.18), transparent 34rem),
                linear-gradient(135deg, #031018 0%, #081923 58%, #02080d 100%);
            background-size: 28px 28px, 28px 28px, auto, auto;
            padding: 24px;
        }

        .shell { max-width: 1100px; margin: 0 auto; }
        .hero, .section, .image-band {
            border: 1px solid var(--line);
            border-radius: 24px;
            background: var(--panel);
            box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
        }

        .hero { overflow: hidden; padding: 32px; }
        .topbar, .hero-grid, .image-band {
            display: grid;
            gap: 24px;
            align-items: center;
        }

        .topbar {
            grid-template-columns: 1fr auto;
            margin-bottom: 34px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 14px;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .brand-mark {
            display: grid;
            place-items: center;
            width: 54px;
            height: 54px;
            border: 1px solid rgba(23, 201, 255, 0.35);
            border-radius: 16px;
            color: var(--cyan);
            background: rgba(23, 201, 255, 0.08);
            font-weight: 900;
        }

        .language-switcher { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
        .lang-btn {
            border: 1px solid var(--line);
            border-radius: 999px;
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
            padding: 10px 14px;
            text-decoration: none;
        }

        .lang-btn.active {
            color: #031018;
            background: var(--cyan);
            border-color: var(--cyan);
            font-weight: 700;
        }

        .hero-grid { grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr); }
        .image-band { grid-template-columns: 0.95fr 1.05fr; margin-top: 22px; padding: 24px; }
        .hero-image, .image-band img {
            width: 100%;
            display: block;
            border: 1px solid rgba(23, 201, 255, 0.3);
            border-radius: 20px;
            background: #031018;
        }

        .eyebrow {
            display: inline-flex;
            margin-bottom: 18px;
            padding: 7px 12px;
            border: 1px solid rgba(244, 118, 40, 0.45);
            border-radius: 999px;
            color: var(--orange);
            background: rgba(244, 118, 40, 0.08);
            font-weight: 700;
        }

        h1 {
            margin: 0 0 18px;
            font-size: clamp(2.25rem, 6vw, 5rem);
            line-height: 0.96;
            letter-spacing: -0.055em;
        }

        h1 span, h3 { color: var(--cyan); }
        h2 { margin: 0 0 12px; font-size: 1.34rem; }
        h3 { margin: 18px 0 8px; font-size: 1rem; }
        p { margin: 0 0 14px; color: var(--muted); }
        ul { margin: 0; padding-left: 1.15rem; color: var(--muted); }
        li { margin-bottom: 10px; }
        strong { color: var(--text); }
        a { color: var(--cyan); text-decoration: none; }
        a:hover { text-decoration: underline; }
        .lead { max-width: 680px; font-size: 1.1rem; }
        [data-lang-panel] { display: none; }
        body[data-lang="cs"] [data-lang-panel="cs"],
        body[data-lang="en"] [data-lang-panel="en"] { display: block; }
        .content {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 18px;
            margin-top: 22px;
        }

        .section { padding: 24px; }
        .section.wide { grid-column: 1 / -1; }
        .notice { border-color: rgba(101, 211, 64, 0.42); background: linear-gradient(135deg, rgba(101, 211, 64, 0.11), var(--panel)); }
        .warning { border-color: rgba(244, 118, 40, 0.42); background: linear-gradient(135deg, rgba(244, 118, 40, 0.1), var(--panel)); }
        footer { margin: 28px 0 0; padding: 22px; color: var(--muted); text-align: center; font-size: 0.92rem; }

        @media (max-width: 860px) {
            body { padding: 12px; }
            .hero { padding: 22px; }
            .topbar, .hero-grid, .image-band, .content { grid-template-columns: 1fr; }
            .language-switcher { justify-content: flex-start; }
        }