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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #e0e0e0;
    background-color: #050805;
    background-image: radial-gradient(circle at 50% 0%, #0d1a12 0%, #050805 70%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* LUZ SEGUIDORA AMBIENTAL */
.luz {
    position: fixed;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(46, 139, 87, 0.15), transparent 70%);
    filter: blur(90px);
    pointer-events: none;
    z-index: -1;
}

/* HEADER */
.header {
    position: sticky;
    top: 0;
    padding: 15px 20px;
    background: rgba(5, 8, 5, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(46, 139, 87, 0.15);
    transition: 0.4s;
    z-index: 1000;
}

.header.shrink {
    padding: 10px 20px;
    background: rgba(3, 5, 3, 0.95);
    border-bottom: 1px solid rgba(46, 139, 87, 0.3);
}

.header-content {
    display: flex;
    align-items: center;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    width: 65px;
    transition: 0.4s;
    filter: drop-shadow(0 0 8px rgba(46, 139, 87, 0.4));
}

.header.shrink .logo {
    width: 40px;
}

.textos h1 {
    font-size: clamp(15px, 3.5vw, 19px);
    color: #ffffff;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.textos h2 {
    font-size: 14px;
    color: #2e8b57;
    font-weight: 500;
}

.titulo {
    font-size: 13px;
    color: #8fa89b;
}

/* HERO BANNER CON VIDEO EN BUCLE */
.video-banner {
    position: relative;
    width: 100%;
    height: 55vh;
    overflow: hidden;
    border-bottom: 1px solid rgba(46, 139, 87, 0.2);
}

.banner-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 8, 5, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
}

.banner-text h2 {
    font-size: clamp(22px, 5vw, 36px);
    color: #ffffff;
    letter-spacing: 2px;
    margin-bottom: 10px;
    text-shadow: 0 0 15px rgba(46, 139, 87, 0.6);
}

.banner-text p {
    font-size: clamp(14px, 3vw, 18px);
    color: #2e8b57;
    font-weight: 500;
}

/* CONTENEDOR PRINCIPAL */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 50px 20px;
}

/* TARJETAS MINIMALISTAS */
.card {
    background: rgba(10, 18, 13, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(46, 139, 87, 0.2);
    border-radius: 16px;
    padding: 35px;
    margin-bottom: 35px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(30px);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.card h2 {
    color: #2e8b57;
    margin-bottom: 20px;
    font-size: 1.4rem;
    font-weight: 600;
}

.card p {
    line-height: 1.7;
    color: #b8c5be;
}

.card.active {
    transform: translateY(0);
    opacity: 1;
}

/* VISOR PDF Y VIDEO */
.contenedor-pdf {
    width: 100%;
    height: 600px;
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    border: 1px solid rgba(46, 139, 87, 0.3);
}

.video iframe {
    width: 100%;
    height: 450px;
    border: none;
    border-radius: 12px;
}

/* BOTONES */
.btn {
    position: relative;
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    color: #ffffff;
    text-decoration: none;
    background: rgba(46, 139, 87, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(46, 139, 87, 0.4);
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s ease;
    text-align: center;
    letter-spacing: 0.5px;
}

.btn:hover {
    transform: translateY(-2px);
    background: rgba(46, 139, 87, 0.3);
    border-color: #2e8b57;
    box-shadow: 0 5px 20px rgba(46, 139, 87, 0.3);
}

/* FOOTER */
.footer {
    text-align: center;
    padding: 60px 20px;
    background: rgba(3, 5, 3, 0.9);
    border-top: 1px solid rgba(46, 139, 87, 0.15);
    margin-top: 60px;
    color: #8fa89b;
    font-size: 14px;
}

.footer p {
    margin-bottom: 8px;
}

.footer .btn {
    margin-top: 20px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .contenedor-pdf,
    .video iframe {
        height: 350px;
    }

    .video-banner {
        height: 40vh;
    }
}