:root {
            --gold: #c5a059;
            --dark: #0a0a0a;
            --light: #f5f5f5;
        }

        body, html {
            margin: 0; padding: 0;
            font-family:cursive;
            background: var(--dark);
            color: var(--light);
            overflow: hidden;
        }

        .main-background {
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background:linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.75)),
                        url("img/cesar_tenerife.jpg");
            background-size: cover;
            background-position: center;
            z-index: -1;
        }

        .slider-container {
            display: flex;
            width: 300vw;
            height: 100vh;
            transition: transform 0.8s cubic-bezier(0.65, 0, 0.35, 1);
        }

        section {
            width: 100vw;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            box-sizing: border-box;
        }

        .content-box {
            max-width: 900px;
            background: rgba(0, 0, 0, 0.5);
            padding: 50px;
            border: 1px solid rgba(197, 160, 89, 0.3) ;
            border-radius:15px ;
            box-shadow: 9px 9px 15px 0px rgba(197,160,89,0.75);
            backdrop-filter: blur(10px);
            text-align: center;
            background-image: url("img/cesar_tenerife.jpg");
            background-size: cover;
            background-position: center;            
        }

        h1 { color: var(--gold); font-size: 2.5rem; margin-bottom: 25px; letter-spacing: 2px; }
        p { line-height: 1.8; font-size: 1rem; text-align: justify; color: #ddd; }

        /* REPRODUCTOR */
        .audio-player {
            position: fixed;
            bottom: 30px;
            left: 30px;
            z-index: 100;
            background: rgba(0,0,0,0.8);
            padding: 10px 20px;
            border-radius: 50px;
            border: 1px solid var(--gold);
            display: flex;
            align-items: center;
            gap: 15px;
        }

        audio { height: 30px; width: 200px; filter: invert(100%) sepia(20%) saturate(70%) grayscale(1); }

        /* BOTONES DE IDIOMA CON TRANSFORMACIÓN */
        .lang-switch {
            position: fixed;
            top: 30px;
            right: 30px;
            z-index: 100;
            display: flex;
            gap: 20px;
        }

        .flag-btn {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            border: 2px solid rgba(197, 160, 89, 0.3);
            cursor: pointer;
            background-size: cover;
            background-position: center;
            transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            filter: grayscale(40%) brightness(0.8);
            box-shadow: 0 4px 15px rgba(0,0,0,0.5);
        }

        /* Efecto de transformación al pasar el ratón */
        .flag-btn:hover {
            transform: scale(1.3) rotate(10deg);
            filter: grayscale(0%) brightness(1.1);
            border-color: var(--gold);
            box-shadow: 0 8px 25px rgba(197, 160, 89, 0.4);
        }

        .flag-btn:active {
            transform: scale(0.9) rotate(-5deg);
        }

        .es { background-image: url("img/bandera_es.png"); }
        .en { background-image: url("img/bandera_en.png"); }

        /* CV Flotante */
        .cv-floating {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 100;
            background: transparent;
            border: 1px solid var(--gold);
            color: var(--gold);
            padding: 12px 20px;
            text-decoration: none;
            border-radius: 4px;
            font-size: 0.8rem;
            transition: 0.4s;
        }

        .cv-floating:hover { background: var(--gold); color: var(--dark); }

        /* Navegación */
        .controls {
            position: fixed;
            bottom: 40px;
            width: 100%;
            display: flex;
            justify-content: center;
            gap: 80px;
            z-index: 10;
        }

        .nav-arrow {
            background: none; border: none;
            color: var(--gold);
            font-size: 3rem;
            cursor: pointer;
            opacity: 0.4;
            transition: 0.3s;
        }

        .nav-arrow:hover:not(:disabled) { opacity: 1; transform: scale(1.1); }
        .nav-arrow:disabled { color: #333; }