/* =========================================
   1. VARIABLES Y CONFIGURACIÓN MAESTRA
   ========================================= */
:root {
    --bg-social: #050505;
    --accent-social: #d30000; /* Rojo principal */
    --accent-glow: #6a0dad;   /* Violeta de apoyo */
    --text-main: #ffffff;
    --text-dim: rgba(255, 255, 255, 0.4);
    --neon-shadow: 0 10px 40px rgba(211, 0, 0, 0.2);
    --transition-smooth: all 0.7s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
    background-color: var(--bg-social);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
}

/* =========================================
   2. NAVBAR (GLASSMORPHISM)
   ========================================= */
.navbar {
    position: fixed;
    top: 0; left: 0; width: 100%; z-index: 9999;
    padding: 25px 5%;
    background: rgba(5, 5, 5, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    display: flex; justify-content: flex-end; align-items: center;
}

.nav-links { list-style: none; display: flex; gap: 45px; }
.nav-links li a {
    text-decoration: none; color: var(--text-dim);
    font-size: 0.7rem; font-weight: 800; text-transform: uppercase;
    letter-spacing: 5px; transition: var(--transition-smooth);
    position: relative;
}

.nav-links li a::after {
    content: ''; position: absolute; bottom: -10px; left: 50%;
    width: 0; height: 1px; background: var(--accent-social);
    transition: var(--transition-smooth); transform: translateX(-50%);
}

.nav-links li a:hover { color: var(--text-main); letter-spacing: 7px; }
.nav-links li a:hover::after { width: 100%; }

/* =========================================
   3. CABECERA (ANIMACIÓN ROJO Y VIOLETA)
   ========================================= */
.category-header-social {
    text-align: center;
    height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 10% 0;
    position: relative; /* Necesario para posicionar la flecha */
}

.category-header-social h1 {
    font-size: clamp(3rem, 10vw, 6.5rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 25px;
    margin: 0;
    line-height: 1.1;
    background: linear-gradient(
        to right, 
        #ffffff 20%, 
        var(--accent-social) 40%, 
        var(--accent-glow) 60%, 
        #ffffff 80%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shineText 6s linear infinite;
}

@keyframes shineText {
    to { background-position: 200% center; }
}

.category-tagline {
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 12px;
    font-size: 0.8rem;
    margin-top: 40px;
    max-width: 800px;
}

/* Indicador de Scroll Animado (Flecha) */
.category-header-social::after {
    content: "";
    position: absolute;
    bottom: 50px;
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent-social), var(--accent-glow), transparent);
    animation: scrollMoveSocial 2s ease-in-out infinite;
}

@keyframes scrollMoveSocial {
    0% { transform: translateY(0); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(20px); opacity: 0; }
}

/* =========================================
   4. GRILLA DE CATEGORÍA (TARJETAS)
   ========================================= */
.projects-grid-social {
    display: grid;
    grid-template-columns: 1fr;
    gap: 120px;
    padding: 100px 8%;
    max-width: 1800px;
    margin: 0 auto;
}

.project-card-social a {
    text-decoration: none;
    color: #ffffff;
    display: block;
}

.project-card-social {
    position: relative;
    background: #000;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.02);
    transition: var(--transition-smooth);
}

.image-wrapper-social {
    width: 100%;
    height: 750px;
    overflow: hidden;
}

.image-wrapper-social img {
    width: 100%; height: 100%; object-fit: cover;
    filter: brightness(0.35) grayscale(100%);
    transition: var(--transition-smooth);
}

.project-card-social:hover {
    transform: translateY(-15px);
    border-color: var(--accent-social);
    box-shadow: 0 40px 80px rgba(0,0,0,0.9), var(--neon-shadow);
}

.project-card-social:hover img {
    filter: brightness(0.9) grayscale(0%);
    transform: scale(1.05);
}

.project-label-social {
    position: absolute; bottom: 0; left: 0; width: 100%;
    padding: 80px 60px;
    background: linear-gradient(to top, rgba(0,0,0,1) 30%, transparent);
    z-index: 2; pointer-events: none;
}

.project-label-social h3 {
    font-size: 3.5rem; letter-spacing: 10px; text-transform: uppercase;
    margin: 0; font-weight: 900;
    color: #ffffff;
}

.label-action {
    font-size: 0.8rem; color: var(--accent-social);
    text-transform: uppercase; letter-spacing: 8px;
    font-weight: 900; margin-top: 15px; display: block;
}

/* =========================================
   5. ÁLBUM DINÁMICO (GRID 6 COL)
   ========================================= */
.photo-stream-container {
    max-width: 1900px; margin: 0 auto; padding: 0 5% 100px;
}

.stream-grid-mixed {
    display: grid; grid-template-columns: repeat(6, 1fr); 
    gap: 50px 30px; align-items: start;
}

.stream-item img {
    width: 100%; height: auto; display: block; object-fit: cover;
    box-shadow: 0 30px 60px rgba(0,0,0,0.7);
    border: 1px solid rgba(255, 255, 255, 0.02);
    filter: brightness(0.8); transition: var(--transition-smooth);
}

.stream-item.horizontal { grid-column: span 3; } 
.stream-item.vertical { grid-column: span 2; }

.stream-item:hover img {
    filter: brightness(1); transform: translateY(-10px);
    border-color: var(--accent-social);
    box-shadow: 0 40px 100px rgba(211, 0, 0, 0.2);
}

/* =========================================
   6. FOOTER Y RESPONSIVE
   ========================================= */
.navigation-footer { display: flex; justify-content: center; padding: 150px 0; }
.btn-back {
    padding: 25px 80px; border: 1px solid #1a1a1a;
    color: var(--text-dim); text-decoration: none;
    text-transform: uppercase; letter-spacing: 8px;
    font-size: 0.75rem; font-weight: 800; transition: var(--transition-smooth);
}
.btn-back:hover { border-color: var(--accent-social); color: #fff; letter-spacing: 10px; }

@media (max-width: 1024px) {
    .stream-grid-mixed { grid-template-columns: repeat(2, 1fr); }
    .stream-item.horizontal, .stream-item.vertical { grid-column: span 1; }
}

@media (max-width: 768px) {
    .category-header-social h1 { letter-spacing: 10px; font-size: 2.5rem; }
    .projects-grid-social { gap: 60px; padding: 50px 5%; }
    .image-wrapper-social { height: 450px; }
}