/* Sistema de Variables Globales (Design Tokens) */
:root {
    --color-surface-dark: #0a0a0c;
    --color-typography-primary: #ffffff;
    --color-typography-muted: #888888;
    --color-brand-accent: #e50914; /* Tonalidad carmesí orientada al streaming de medios */
    --font-family-sans: 'Helvetica Neue', Helvetica, -apple-system, BlinkMacSystemFont, Arial, sans-serif;
    --grid-spacing-unit: 30px;
    --transition-curve: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Reset y Normalización de Documento */
body {
    background-color: var(--color-surface-dark);
    color: var(--color-typography-primary);
    font-family: var(--font-family-sans);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ARQUITECTURA DE LA SECCIÓN HEROICA */
.portfolio-hero-section {
    position: relative;
    height: 85vh; /* Altura relativa al Viewport (Ventana del navegador) */
    background-size: cover;
    background-position: center 20%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Oscurecimiento Inferior para Legibilidad del Texto */
.hero-overlay-gradient {
    background: linear-gradient(to top, rgba(10,10,12,1) 0%, rgba(10,10,12,0.6) 40%, rgba(0,0,0,0) 100%);
    position: absolute;
    inset: 0; /* Sustituye top, right, bottom, left = 0 */
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: 6vw;
    text-align: center;
}

.brand-signature-title {
    font-size: 0.95rem;
    letter-spacing: 0.25em;
    color: var(--color-typography-muted);
    text-transform: uppercase;
    font-weight: 500;
}

.featured-masterpiece-title {
    font-size: clamp(2.5rem, 5vw, 5rem); /* Tipografía fluida que se ajusta a pantallas móviles y escritorio */
    font-weight: 800;
    margin: 15px 0 25px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.masterpiece-synopsis {
    max-width: 600px;
    margin-bottom: 35px;
    font-size: 1.1rem;
    line-height: 1.6;
    color: #cccccc;
}

/* Estilización del Botón de Acción Principal */
.action-btn-play {
    background-color: rgba(0,0,0,0.3);
    color: var(--color-typography-primary);
    border: 2px solid var(--color-typography-primary);
    padding: 16px 48px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(4px);
    transition: all 0.3s var(--transition-curve);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.action-btn-play:hover, .action-btn-play:focus {
    background-color: var(--color-typography-primary);
    color: var(--color-surface-dark);
    transform: scale(1.05);
    outline: none;
}

/* SISTEMA DE CUADRÍCULAS PARA EL CATÁLOGO */
.portfolio-catalog-grids {
    max-width: 1600px;
    margin: 0 auto;
    padding: 60px 4vw;
}

.catalog-category-block {
    margin-bottom: 90px;
}

.catalog-section-title {
    font-size: 1.6rem;
    margin-bottom: 35px;
    font-weight: 600;
    border-left: 5px solid var(--color-brand-accent);
    padding-left: 18px;
    letter-spacing: 0.03em;
}

/* Implementación del CSS Grid fluido para organizar las tarjetas de video */
.dynamic-video-grid {
    display: grid;
    /* La propiedad minmax garantiza que las columnas nunca sean menores de 320px, y permite el auto-relleno del espacio disponible */
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--grid-spacing-unit);
}

.interactive-video-card {
    cursor: pointer;
    transition: transform 0.4s var(--transition-curve);
}

.interactive-video-card:hover, .interactive-video-card:focus {
    transform: translateY(-8px);
    outline: none;
}

.card-thumbnail-container {
    height: 200px;
    background-size: cover;
    background-position: center;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

/* Oscurecimiento sobre el estado Hover */
.card-thumbnail-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.4);
    opacity: 0;
    transition: opacity 0.4s var(--transition-curve);
}

.interactive-video-card:hover .card-thumbnail-container::after,
.interactive-video-card:focus .card-thumbnail-container::after {
    opacity: 1;
}

/* Indicador de Reproducción oculto hasta interacción */
.visual-play-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.6);
    font-size: 3.5rem;
    color: white;
    z-index: 2;
    opacity: 0;
    transition: all 0.4s var(--transition-curve);
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.5));
}

.interactive-video-card:hover .visual-play-indicator,
.interactive-video-card:focus .visual-play-indicator {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.card-metadata-footer {
    padding-top: 18px;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.card-project-title {
    font-size: 1.15rem;
    margin: 0;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 15px;
}

.card-production-year {
    color: var(--color-typography-muted);
    font-size: 0.95rem;
    font-weight: 600;
}

/* SISTEMA ESTRUCTURAL DEL LIGHTBOX (Marco de Reproducción Modal) */
.lightbox-backdrop-layer {
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.95);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px); /* Efecto cristal para profundidad de campo */
}

.lightbox-modal-content {
    width: 90vw;
    max-width: 1400px;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.7);
}

/* Ingeniería geométrica para retener la Proporción 16:9 en Marcos sin dimensión estática */
.aspect-ratio-iframe-container {
    position: relative;
    /* La proporción matemática para un ancho de 16 y un alto de 9 es 9/16 = 0.5625 = 56.25% */
    padding-bottom: 56.25%; 
    height: 0;
    overflow: hidden;
    background-color: #000;
}

.aspect-ratio-iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.modal-close-trigger {
    position: absolute;
    top: -50px;
    right: 0;
    background: none;
    border: none;
    color: rgba(255,255,255,0.7);
    font-size: 3.5rem;
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s ease;
}

.modal-close-trigger:hover, .modal-close-trigger:focus {
    color: white;
    outline: none;
}

/* Responsividad para Dispositivos Móviles */
@media (max-width: 768px) {
    .modal-close-trigger {
        top: 10px;
        right: 10px;
        z-index: 10;
        font-size: 2.5rem;
        text-shadow: 0 2px 4px rgba(0,0,0,0.8);
    }
}