:root {
    /* Nueva paleta más vibrante y profunda */
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.4);
    --text-dark: #1a202c;
    --text-muted: #4a5568;
    --accent-1: #4ecdc4;
    --accent-2: #ff6b6b;
    --shadow-soft: 0 10px 40px rgba(0, 0, 0, 0.1);
}

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

body.contenido {
    font-family: 'Inter', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-gradient);
    background-attachment: fixed;
    min-height: 100vh;
    padding: 20px;
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    gap: 25px;
    max-width: 1300px;
    margin: 0 auto;
}

/* --- Header --- */
header {
    text-align: center;
    background: var(--glass-bg);
    padding: 50px 30px;
    border-radius: 30px;
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
}

header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -1.5px;
    background: linear-gradient(to right, #4a5568, #1a202c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Navegación Flotante --- */
nav {
    background: var(--glass-bg);
    padding: 8px;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
    position: sticky;
    top: 20px;
    z-index: 100;
    width: fit-content;
    margin: 0 auto;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 5px;
}

nav a {
    text-decoration: none;
    color: var(--text-muted);
    padding: 12px 25px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 50px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

nav a:hover {
    background: white;
    color: #667eea;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transform: translateY(-2px);
}

/* --- Grid de Contenido --- */
.galeria {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 30px;
}

section {
    background: var(--glass-bg);
    border-radius: 35px;
    padding: 45px;
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

section:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}

section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 35px;
    text-align: center;
}

section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 6px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    margin: 15px auto 0;
    border-radius: 10px;
}

/* --- Items del Submenú --- */
.submenu li {
    margin-bottom: 15px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.submenu li:hover {
    background: white;
    border-color: var(--accent-1);
    transform: scale(1.02);
}

.submenu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.15rem;
}

.descripcion {
    color: var(--text-muted);
    font-style: normal;
    font-size: 0.9rem;
    font-weight: 400;
    max-width: 65%;
    text-align: right;
    line-height: 1.5;
}

/* --- Footer --- */
.pie {
    background: rgba(26, 32, 44, 0.95);
    color: white;
    padding: 60px 30px;
    border-radius: 40px 40px 10px 10px;
    text-align: center;
}

/* --- Animación --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

section {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Responsive */
@media (max-width: 768px) {
    .galeria { grid-template-columns: 1fr; }
    .submenu li { flex-direction: column; text-align: center; gap: 10px; }
    .descripcion { max-width: 100%; text-align: center; }
}