* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        background: linear-gradient(135deg, #0a0e27 0%, #1a1a3e 50%, #0f1f3c 100%);
        color: #fff;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        overflow-x: hidden;
        position: relative;
    }

    /* Fondo animado con estrellas */
    .stars {
        position: fixed;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        z-index: 1;
    }

    .star {
        position: absolute;
        width: 2px;
        height: 2px;
        background: #fff;
        border-radius: 50%;
        animation: twinkle 3s infinite;
    }

    @keyframes twinkle {

        0%,
        100% {
            opacity: 0.3;
        }

        50% {
            opacity: 1;
        }
    }

    .container {
        position: relative;
        z-index: 2;
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 20px;
    }

    /* Header */
    header {
        text-align: center;
        margin-bottom: 60px;
        animation: slideDown 1s ease-out;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-30px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    header h1 {
        font-size: 3.5em;
        background: linear-gradient(45deg, #00d4ff, #7c3aed, #00d4ff);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 10px;
        text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    }

    header h1 .title {
        /* background: linear-gradient(45deg, #00ff88, #00cc66); */
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        mix-blend-mode: normal;
    }

    header h1 .icon {
        font-size: 1.2em;
        /* forzar uso de fuentes emoji a color */
        font-family: 'Segoe UI Emoji', 'Apple Color Emoji', 'Noto Color Emoji', sans-serif;
        /* evitar que el gradiente y el text-clip afecten al emoji */
        background: none !important;
        background-clip: border-box;
        -webkit-background-clip: border-box;
        -webkit-text-fill-color: initial;
        color: initial;
        mix-blend-mode: normal;
    }

    header p {
        font-size: 1.2em;
        color: #a0aec0;
        margin-bottom: 20px;
    }

    /* Reloj Digital */
    .reloj-section {
        text-align: center;
        margin-bottom: 50px;
        padding: 30px;
        background: rgba(30, 30, 60, 0.6);
        border-radius: 15px;
        border: 2px solid rgba(0, 212, 255, 0.3);
        backdrop-filter: blur(10px);
        overflow-x: auto;
    }

    .reloj {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 8px;
        margin-top: 20px;
        flex-wrap: nowrap;
        min-width: min-content;
    }

    .reloj img {
        width: 50px;
        height: 75px;
        filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.5));
        flex-shrink: 0;
    }

    /* Secciones temáticas */
    .sections {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
        margin-bottom: 40px;
    }

    .card {
        background: rgba(30, 40, 80, 0.7);
        border: 2px solid rgba(0, 212, 255, 0.2);
        border-radius: 15px;
        padding: 30px;
        cursor: pointer;
        transition: all 0.3s ease;
        backdrop-filter: blur(10px);
        animation: fadeInUp 0.8s ease-out forwards;
        opacity: 0;
    }

    .card:nth-child(1) {
        animation-delay: 0.2s;
    }

    .card:nth-child(2) {
        animation-delay: 0.4s;
    }

    .card:nth-child(3) {
        animation-delay: 0.6s;
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .card:hover {
        transform: translateY(-10px);
        border-color: rgba(0, 212, 255, 0.8);
        box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    }

    .card-icon {
        font-size: 3em;
        margin-bottom: 15px;
    }

    .card h2 {
        font-size: 1.5em;
        margin-bottom: 10px;
        color: #00d4ff;
    }

    .card p {
        color: #cbd5e1;
        line-height: 1.6;
    }

    /* Sección de datos curiosos */
    .facts {
        background: rgba(20, 30, 70, 0.8);
        border: 2px solid rgba(124, 58, 237, 0.4);
        border-radius: 15px;
        padding: 40px;
        margin-bottom: 40px;
        backdrop-filter: blur(10px);
    }

    .facts h2 {
        text-align: center;
        font-size: 2em;
        margin-bottom: 30px;
        color: #7c3aed;
    }

    .facts-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    .fact-item {
        padding: 20px;
        background: rgba(0, 212, 255, 0.1);
        border-left: 4px solid #00d4ff;
        border-radius: 8px;
        transition: all 0.3s ease;
    }

    .fact-item:hover {
        background: rgba(0, 212, 255, 0.2);
        transform: translateX(5px);
    }

    .fact-item strong {
        color: #00d4ff;
    }

    /* Footer */
    footer {
        text-align: center;
        padding: 30px;
        color: #64748b;
        border-top: 1px solid rgba(0, 212, 255, 0.2);
        margin-top: 60px;
    }

    /* Responsive */
    @media (max-width: 1200px) {
        .reloj img {
            width: 45px;
            height: 67.5px;
        }

        .reloj {
            gap: 6px;
        }
    }

    @media (max-width: 1024px) {
        .reloj img {
            width: 40px;
            height: 60px;
        }

        .reloj {
            gap: 5px;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 2em;
        }

        .reloj-section {
            padding: 20px;
        }

        .reloj img {
            width: 35px;
            height: 52.5px;
        }

        .reloj {
            gap: 4px;
        }

        .sections {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 600px) {
        .reloj img {
            width: 28px;
            height: 42px;
        }

        .reloj {
            gap: 2px;
        }

        .reloj-section {
            padding: 15px 10px;
        }
    }

    @media (max-width: 500px) {
        header h1 {
            font-size: 1.8em;
        }

        .reloj img {
            width: 22px;
            height: 33px;
        }

        .reloj {
            gap: 1.5px;
        }

        .reloj-section {
            padding: 12px 8px;
        }
    }

    @media (max-width: 420px) {
        header h1 {
            font-size: 1.5em;
        }

        header p {
            font-size: 0.9em;
        }

        .reloj-section {
            padding: 10px 5px;
            margin: 0 -20px 50px -20px;
        }

        .reloj img {
            width: 18px;
            height: 27px;
        }

        .reloj {
            gap: 1px;
            padding: 10px 5px;
        }

        .card {
            padding: 20px;
        }

        .card h2 {
            font-size: 1.2em;
        }

        .card p {
            font-size: 0.9em;
        }

        .facts {
            padding: 20px;
        }

        .facts h2 {
            font-size: 1.5em;
        }

        .fact-item {
            padding: 15px;
            font-size: 0.9em;
        }
    }

    @media (max-width: 360px) {
        header h1 {
            font-size: 1.3em;
        }

        header p {
            font-size: 0.8em;
        }

        .reloj img {
            width: 16px;
            height: 24px;
        }

        .reloj {
            gap: 0.5px;
        }

        .reloj-section {
            padding: 8px 3px;
        }

        .card {
            padding: 15px;
        }

        .card-icon {
            font-size: 2em;
        }

        .card h2 {
            font-size: 1em;
        }

        .card p {
            font-size: 0.85em;
        }

        .facts h2 {
            font-size: 1.3em;
        }

        .fact-item {
            padding: 10px;
            font-size: 0.8em;
        }
    }