:root {
            --bg-gradient: radial-gradient(circle at top, #2b3562 0%, #050515 55%, #020109 100%);
            --accent: #ffb86c;
            --accent-strong: #ff9a3c;
            --glass-bg: rgba(9, 9, 20, 0.75);
            --glass-border: rgba(255, 255, 255, 0.08);
            --text-main: #f9f9ff;
            --text-muted: #b0b3c6;
        }

        * {
            box-sizing: border-box;
        }

        body, html {
            margin: 0;
            padding: 0;
            overflow: hidden;
            width: 100%;
            height: 100%;
            font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            color: var(--text-main);
            background: var(--bg-gradient);
        }

        canvas {
            display: block;
        }

        /* Jemná animace pozadí, aby to žilo i bez interakce */
        body::before {
            content: "";
            position: fixed;
            inset: -50%;
            background:
                radial-gradient(circle at 10% 20%, rgba(255, 184, 108, 0.12) 0, transparent 40%),
                radial-gradient(circle at 80% 80%, rgba(130, 87, 230, 0.18) 0, transparent 45%);
            opacity: 0.8;
            mix-blend-mode: screen;
            pointer-events: none;
            animation: bgPulse 18s ease-in-out infinite alternate;
        }

        @keyframes bgPulse {
            0% { transform: translate3d(0, 0, 0) scale(1); }
            100% { transform: translate3d(-5%, -3%, 0) scale(1.05); }
        }

        /* 3D kontejner přes celou obrazovku */
        #container {
            position: fixed;
            inset: 0;
            z-index: 0;
        }

        /* Horní „hero“ vrstva (osobní stránka / info karta) */
        .ui-layer {
            position: fixed;
            inset: 0;
            display: flex;
            align-items: flex-start;   /* místo center */
            justify-content: center;
            padding: 24px;
            padding-top: 32px;         /* trochu dolů od horního okraje */
            pointer-events: none;      /* 3D scéna zůstane ovladatelná */
            z-index: 10;
        }

        .hero-card {
            pointer-events: auto;
            max-width: 960px;
            width: 100%;
            padding: 16px 22px 14px;   /* nižší karta */
            border-radius: 20px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(20px) saturate(130%);
            box-shadow:
                0 18px 48px rgba(0, 0, 0, 0.6),
                0 0 0 1px rgba(255, 255, 255, 0.01);
            display: grid;
            grid-template-columns: minmax(0, 3fr) minmax(0, 2.2fr);
            gap: 16px;
        }

        @media (max-width: 800px) {
            body, html {
                overflow: hidden;
            }

            .ui-layer {
                align-items: flex-end;          /* karta dolů místo nahoru */
                justify-content: center;
                padding: 10px;
                padding-bottom: 14px;
            }

            .hero-card {
                grid-template-columns: 1fr;
                padding: 10px 12px 9px;
                border-radius: 16px;
                max-width: 100%;
            }

            .hero-main {
                gap: 4px;
            }

            .hero-title {
                font-size: 1.35rem;
            }

            .hero-subtitle {
                font-size: 0.8rem;
            }

            #title {
                font-size: 0.8rem;
                min-height: 1.1em;
            }

            .hero-footer {
                margin-top: 8px;
                gap: 6px;
            }

            .pill {
                font-size: 0.7rem;
                padding: 4px 8px;
            }

            .hero-cta-row {
                margin-top: 6px;
                gap: 6px;
            }

            .btn-primary,
            .btn-ghost {
                padding: 6px 10px;
                font-size: 0.78rem;
            }

            .hero-side {
                display: none;   /* pravý sloupec (tagy, malá poznámka) na mobilu skryjeme */
            }
        }

        .hero-main {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .hero-label {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.22em;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-label-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 14px var(--accent);
        }

        .hero-title-row {
            display: flex;
            align-items: baseline;
            gap: 8px;
            flex-wrap: wrap;
        }

        .hero-title {
            font-size: clamp(1.6rem, 2.6vw, 2.1rem);
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        .hero-badge {
            font-size: 0.8rem;
            padding: 4px 10px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(30, 30, 60, 0.7));
            color: var(--text-muted);
        }

        .hero-subtitle {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 32rem;
        }

        #title {
            margin-top: 6px;
            min-height: 1.2em;
            font-size: 0.9rem;
            font-weight: 300;
            color: var(--text-main);
            opacity: 0;
            transition: opacity 0.9s ease-in-out;
            text-shadow: 0 0 8px rgba(0, 0, 0, 0.8);
        }

        .hero-footer {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
            flex-wrap: wrap;
        }

        .pill {
            font-size: 0.78rem;
            padding: 6px 12px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-muted);
        }

        .dot-separator {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.5);
        }

        .hero-cta-row {
            margin-top: 10px;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .btn-primary {
            pointer-events: auto;
            padding: 8px 16px;
            border-radius: 999px;
            border: none;
            background: linear-gradient(135deg, var(--accent-strong), #ff6a88);
            color: #1b0f1a;
            font-size: 0.9rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            box-shadow: 0 10px 30px rgba(255, 138, 76, 0.4);
            transition: transform 0.12s ease-out, box-shadow 0.12s ease-out, filter 0.15s ease-out;
        }

        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 16px 46px rgba(255, 138, 76, 0.55);
            filter: brightness(1.05);
        }

        .btn-ghost {
            pointer-events: auto;
            padding: 8px 14px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            background: rgba(10, 10, 25, 0.7);
            color: var(--text-main);
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: background 0.12s ease-out, transform 0.12s ease-out;
        }

        .btn-ghost:hover {
            background: rgba(30, 30, 60, 0.9);
            transform: translateY(-1px);
        }

        .hero-side {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            justify-content: space-between;
            gap: 10px;
        }

        .hero-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: flex-end;
        }

        .tag {
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-muted);
        }

        .hero-small-note {
            font-size: 0.72rem;
            color: var(--text-muted);
            opacity: 0.8;
            text-align: right;
        }

        @media (max-width: 800px) {
            .hero-side {
                align-items: flex-start;
            }
            .hero-tag-list {
                justify-content: flex-start;
            }
            .hero-small-note {
                text-align: left;
            }
        }

        /* Nové styly pro tlačítko a skrytí karty */
        .hero-toggle {
            position: fixed;
            bottom: 16px;
            right: 16px;
            z-index: 12;
            padding: 6px 12px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(5, 5, 20, 0.8);
            color: var(--text-main);
            font-size: 0.8rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            cursor: pointer;
            display: none; /* defaultně skryté, ukáže se po zavření panelu */
            transition: background 0.15s ease-out, transform 0.12s ease-out, opacity 0.2s ease-out;
        }

        .hero-toggle:hover {
            background: rgba(30, 30, 60, 0.95);
            transform: translateY(-1px);
        }

        /* Close button v pravém horním rohu karty */
        .hero-close {
            position: absolute;
            top: 10px;
            right: 12px;
            width: 26px;
            height: 26px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(5, 5, 20, 0.8);
            color: var(--text-main);
            font-size: 0.9rem;
            line-height: 1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            padding: 0;
            opacity: 0.8;
            transition: background 0.15s ease-out, opacity 0.15s ease-out, transform 0.12s ease-out;
        }

        .hero-close:hover {
            background: rgba(30, 30, 60, 0.95);
            opacity: 1;
            transform: translateY(-1px);
        }

        /* Animace otevření / zavření karty */
        .ui-layer {
            transition: opacity 0.25s ease-out, transform 0.25s ease-out;
        }

        .ui-layer.hidden {
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
        }

        .ui-layer.hidden .hero-card {
            pointer-events: none; /* přidej tohle */
        }