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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        /* ============================================ Sección de Bienvenida ========================================= */
        #welcome {
            position: relative;
            width: 100%;
            height: 100vh;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Video de fondo */
        .video-background {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
        }

        .video-background video {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: brightness(0.6);
        }

        /* Overlay con gradiente */
        .video-background::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                135deg,
                rgba(130, 131, 134, 0.7) 0%,
                rgba(73, 81, 95, 0.6) 50%,
                rgba(22, 22, 24, 0.5) 100%
            );
            z-index: 2;
        }

        /* Patrón decorativo */
        .video-background::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.03)"/></svg>');
            z-index: 3;
            opacity: 0.5;
        }

        /* Contenido de bienvenida */
        .welcome-content {
            position: relative;
            z-index: 10;
            text-align: center;
            color: white;
            padding: 40px;
            max-width: 1000px;
            margin: 0 auto;
        }

        /* Logo animado */
        .welcome-logo {
            width: 150px;
            height: 150px;
            margin: 0 auto 40px;
            position: relative;
            animation: fadeInScale 1s ease;
        }

        .welcome-logo img {
            width: 100%;
            height: 100%;
            border-radius: 30px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.5);
        }

        .welcome-logo::before {
            content: '';
            position: absolute;
            top: -20px;
            left: -20px;
            right: -20px;
            bottom: -20px;
            border: 3px solid rgba(255,255,255,0.2);
            border-radius: 40px;
            animation: pulse 2s ease infinite;
        }

        /* Título principal */
        .welcome-content h1 {
            font-size: 4em;
            font-weight: 800;
            margin-bottom: 20px;
            text-shadow: 3px 3px 10px rgba(0,0,0,0.5);
            animation: fadeInUp 1s ease 0.3s backwards;
            line-height: 1.2;
        }

        .welcome-content h1 .highlight {
            background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Subtítulo */
        .welcome-content p {
            font-size: 1.5em;
            margin-bottom: 40px;
            color: rgba(255,255,255,0.95);
            text-shadow: 2px 2px 8px rgba(0,0,0,0.4);
            animation: fadeInUp 1s ease 0.5s backwards;
            line-height: 1.6;
            font-weight: 300;
        }

        /* Información de frecuencia */
        .frequency-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(10px);
            padding: 15px 40px;
            border-radius: 50px;
            margin-bottom: 40px;
            border: 2px solid rgba(255,255,255,0.3);
            animation: fadeInUp 1s ease 0.7s backwards;
        }

        .frequency-badge i {
            color: #4facfe;
            font-size: 1.5em;
            margin-right: 15px;
        }

        .frequency-badge span {
            font-size: 2em;
            font-weight: 700;
            color: white;
        }

        /* Botones de acción */
        .welcome-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            animation: fadeInUp 1s ease 0.9s backwards;
        }

        .btn {
            padding: 18px 45px;
            border: none;
            border-radius: 50px;
            font-size: 1.1em;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }

        .btn-primary {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(79, 172, 254, 0.5);
        }

        .btn-secondary {
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(10px);
            color: white;
            border: 2px solid rgba(255,255,255,0.3);
        }

        .btn-secondary:hover {
            background: rgba(255,255,255,0.25);
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(255,255,255,0.2);
        }

        .btn i {
            font-size: 1.2em;
        }

        /* Indicador de scroll */
        .scroll-indicator {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 10;
            animation: fadeInUp 1s ease 1.1s backwards;
        }

        .scroll-indicator .mouse {
            width: 30px;
            height: 50px;
            border: 3px solid rgba(255,255,255,0.5);
            border-radius: 20px;
            position: relative;
            margin: 0 auto 10px;
        }

        .scroll-indicator .mouse::before {
            content: '';
            position: absolute;
            top: 10px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 10px;
            background: rgba(255,255,255,0.8);
            border-radius: 2px;
            animation: scroll 2s ease infinite;
        }

        .scroll-indicator p {
            color: rgba(255,255,255,0.8);
            font-size: 0.9em;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-weight: 600;
        }

        /* Elementos decorativos flotantes */
        .floating-elements {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 5;
            pointer-events: none;
        }

        .floating-icon {
            position: absolute;
            color: rgba(255,255,255,0.1);
            font-size: 3em;
            animation: float 6s ease-in-out infinite;
        }

        .floating-icon:nth-child(1) {
            top: 20%;
            left: 10%;
            animation-delay: 0s;
        }

        .floating-icon:nth-child(2) {
            top: 60%;
            left: 85%;
            animation-delay: 1s;
        }

        .floating-icon:nth-child(3) {
            top: 40%;
            right: 15%;
            animation-delay: 2s;
        }

        .floating-icon:nth-child(4) {
            bottom: 30%;
            left: 20%;
            animation-delay: 1.5s;
        }

        /* Animaciones */
        @keyframes fadeInScale {
            from {
                opacity: 0;
                transform: scale(0.8);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(40px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
                opacity: 0.5;
            }
            50% {
                transform: scale(1.1);
                opacity: 0.8;
            }
        }

        @keyframes scroll {
            0% {
                opacity: 1;
                transform: translateX(-50%) translateY(0);
            }
            100% {
                opacity: 0;
                transform: translateX(-50%) translateY(20px);
            }
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0) rotate(0deg);
            }
            50% {
                transform: translateY(-30px) rotate(10deg);
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            #welcome {
                height: 100vh;
            }

            .welcome-logo {
                width: 100px;
                height: 100px;
                margin-bottom: 30px;
            }

            .welcome-content h1 {
                font-size: 2.5em;
            }

            .welcome-content p {
                font-size: 1.2em;
            }

            .frequency-badge {
                padding: 12px 30px;
            }

            .frequency-badge span {
                font-size: 1.5em;
            }

            .welcome-buttons {
                flex-direction: column;
                gap: 15px;
            }

            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }

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

        @media (max-width: 480px) {
            .welcome-content h1 {
                font-size: 2em;
            }

            .welcome-content p {
                font-size: 1em;
            }

            .frequency-badge {
                padding: 10px 25px;
            }

            .frequency-badge i {
                font-size: 1.2em;
                margin-right: 10px;
            }

            .frequency-badge span {
                font-size: 1.3em;
            }
        }

        /* Controles de video (opcional) */
        .video-controls {
            position: absolute;
            bottom: 20px;
            right: 20px;
            z-index: 10;
            display: flex;
            gap: 10px;
        }

        .video-control-btn {
            width: 45px;
            height: 45px;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(10px);
            border: 2px solid rgba(255,255,255,0.3);
            border-radius: 50%;
            color: white;
            font-size: 1.2em;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .video-control-btn:hover {
            background: rgba(255,255,255,0.25);
            transform: scale(1.1);
        }