:root {
    --color-bg-ads: #020617;
    --color-gold: #fbbf24;
    --color-horror: #991b1b;
    --color-cyber: #0ea5e9;
    --color-glitch: #a855f7;
    --color-surface-ads: rgba(15, 23, 42, 0.8);
    --font-heading: system-ui, -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100% !important;
    width: 100% !important;
    overflow: hidden !important;
    margin: 0;
    padding: 0;
}

.boton-volver {
    position: absolute;
    top: 2rem;
    left: 2rem;
    color: var(--color-text-dim);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    transition: all 0.2s;
    z-index: 100;
}

.boton-volver:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateX(-5px);
}

body {
    background-color: var(--color-bg-ads);
    color: white;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 1rem 0;
    flex-shrink: 0;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 900;
    margin: 0;
}

header p {
    color: #94a3b8;
    font-size: 1rem;
    margin: 0.2rem 0 0;
}

.grid-promociones {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    padding: 1rem 2rem;
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    flex: 1;
    min-height: 0;
}

.tarjeta-anuncio {
    position: relative;
    border-radius: 1.5rem;
    overflow: hidden;
    height: 100%;
    background: var(--color-surface-ads);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.4s ease, box-shadow 0.4s;
    cursor: pointer;
}

.tarjeta-anuncio:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.imagen-anuncio {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
    transition: opacity 0.4s;
}

.tarjeta-anuncio:hover .imagen-anuncio {
    opacity: 0.7;
    transform: scale(1.1);
}

.contenido-anuncio {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9) 50%);
    z-index: 2;
}

.contenido-anuncio h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.contenido-anuncio p {
    font-size: 0.85rem;
    color: #cbd5e1;
}

.insignia-anuncio {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    padding: 0.4rem 1rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 10;
}

/* Specific Ad Styles */
.anuncio-horror { background: radial-gradient(circle at center, #2b0000, #000); }
.anuncio-cyber { background: radial-gradient(circle at center, #001f3f, #020617); }
.anuncio-lujo { background: radial-gradient(circle at center, #1e1b1e, #000); }
.anuncio-glitch { background: #000; }

.anuncio-horror:hover { border-color: var(--color-horror); box-shadow: 0 0 30px rgba(153, 27, 27, 0.3); }
.anuncio-cyber:hover { border-color: var(--color-cyber); box-shadow: 0 0 30px rgba(14, 165, 233, 0.3); }
.anuncio-lujo:hover { border-color: var(--color-gold); box-shadow: 0 0 30px rgba(251, 191, 36, 0.2); }
.anuncio-glitch:hover { border-color: var(--color-glitch); box-shadow: 0 0 30px rgba(168, 85, 247, 0.3); }

.anuncio-horror .pulso { animation: pulso-sangre 2s infinite; }
@keyframes pulso-sangre {
    0% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.2); opacity: 0.2; }
    100% { transform: scale(1); opacity: 0.6; }
}

.borde-neon {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}
.anuncio-cyber:hover .borde-neon { border-color: var(--color-cyber); box-shadow: inset 0 0 20px var(--color-cyber); }

.texto-glitch { position: relative; }
.anuncio-glitch:hover .texto-glitch::before {
    content: 'ERROR 404';
    position: absolute;
    left: 2px;
    text-shadow: -2px 0 #ff00c1;
    animation: efecto-glitch 0.3s infinite linear alternate-reverse;
}
@keyframes efecto-glitch {
    0% { clip-path: inset(10% 0 50% 0); }
    100% { clip-path: inset(40% 0 10% 0); }
}

.boton-accion {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: 0.6rem;
    font-weight: 700;
    text-decoration: none;
    font-size: 0.85rem;
    transition: all 0.2s;
    background: white;
    color: black;
}

.boton-accion:hover {
    transform: scale(1.05);
    background: #f1f5f9;
}

footer {
    text-align: center;
    padding: 0.75rem 0;
    opacity: 0.5;
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* Forced Responsive No-Scroll */
@media (max-width: 1200px) {
    .grid-promociones { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .contenido-anuncio h2 { font-size: 1.2rem; }
}

@media (max-width: 600px) {
    header h1 { font-size: 1.8rem; }
    .grid-promociones { gap: 0.75rem; padding: 0.5rem; }
    .contenido-anuncio { padding: 1rem; }
    .contenido-anuncio p { display: none; }
}