/* =========================================
   1. VARIABLES Y RESET (VERDE ESMERALDA)
   ========================================= */
:root {
    --bg-dark: #030504;
    --accent: #2ecc71; 
    --text: #ffffff;
    --dim: rgba(255, 255, 255, 0.4);
    --neon: 0 0 30px rgba(46, 204, 113, 0.2);
    --transition: all 0.7s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
}

/* =========================================
   2. NAVBAR FIJA (UNIFICADA)
   ========================================= */
.navbar {
    position: fixed;
    top: 0; left: 0; width: 100%; z-index: 9999;
    padding: 30px 6%; /* Volvemos al padding estándar */
    background: rgba(3, 5, 4, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex; 
    justify-content: flex-end; /* Alineado a la derecha como Tandil/CABA */
    align-items: center;
}

.nav-links { 
    list-style: none; 
    display: flex; 
    gap: 40px; 
}

.nav-links a {
    text-decoration: none; 
    color: var(--dim);
    font-size: 0.75rem; /* Tamaño estándar de tu portfolio */
    letter-spacing: 4px; 
    text-transform: uppercase;
    font-weight: 800; /* Negrita consistente */
    transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active { 
    color: var(--accent); 
    text-shadow: var(--neon);
}

/* =========================================
   3. CABECERA (PROPORCIONES ESTÁNDAR)
   ========================================= */
.album-header-especifico {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 0 10%;
}

.album-header-especifico h1 {
    font-size: clamp(3.5rem, 12vw, 7.5rem); /* Volvemos al tamaño de CABA */
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 25px; 
    margin-left: 25px; /* Centrado óptico */
    background: linear-gradient(to right, #fff, var(--accent), #fff);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shineNature 8s linear infinite;
}

.album-header-especifico p {
    color: var(--accent);
    letter-spacing: 8px;
    text-transform: uppercase;
    font-size: 0.8rem;
    font-weight: 800;
    margin-top: 20px;
    opacity: 0.8;
}
/* =========================================
   3. CABECERA DE IMPACTO (BARRERA DE ENTRADA)
   ========================================= */
.album-header-especifico {
    height: 100vh; /* Ocupa toda la pantalla */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 0 10%;
}

.album-header-especifico h1 {
    font-size: clamp(3rem, 10vw, 6.5rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 25px;
    /* Animación de brillo infinito */
    background: linear-gradient(to right, #fff, var(--accent), #fff);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shineNature 8s linear infinite;
}

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

.album-header-especifico p {
    color: var(--accent);
    letter-spacing: 8px;
    text-transform: uppercase;
    font-size: 0.8rem;
    margin-top: 20px;
    opacity: 0.7;
}

/* FLECHA INDICADORA DE SCROLL */
.album-header-especifico::after {
    content: "";
    position: absolute;
    bottom: 60px;
    width: 1px;
    height: 80px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); opacity: 0; transform-origin: top; }
    50% { transform: scaleY(1); opacity: 1; transform-origin: top; }
    100% { transform: scaleY(0); opacity: 0; transform-origin: bottom; }
}

/* =========================================
   4. GRILLA DE FOTOS (SCROLL HACIA ABAJO)
   ========================================= */
.photo-stream-container {
    max-width: 1900px;
    margin: 0 auto;
    padding: 0 5% 100px;
}

.photo-group { margin-bottom: 120px; }

.group-title {
    font-size: 0.8rem;
    letter-spacing: 10px;
    text-transform: uppercase;
    color: var(--dim);
    margin-bottom: 40px;
    text-align: center;
}

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

.stream-item { 
    overflow: hidden; 
    background: #000;
    position: relative;
}

.stream-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: brightness(0.7);
    transition: var(--transition);
}

/* Configuración de celdas */
.stream-item.horizontal { 
    grid-column: span 3; 
    aspect-ratio: 16 / 9; 
}

.stream-item.vertical { 
    grid-column: span 2; 
    aspect-ratio: 2 / 3; 
}

/* Efectos Hover */
.stream-item:hover img {
    filter: brightness(1);
    transform: scale(1.05);
}

.stream-item:hover {
    box-shadow: var(--neon);
    z-index: 10;
}

/* =========================================
   5. FOOTER
   ========================================= */
.navigation-footer {
    display: flex;
    justify-content: center;
    padding: 100px 0;
}

.btn-back {
    padding: 20px 60px;
    border: 1px solid #222;
    color: var(--dim);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 5px;
    transition: var(--transition);
}

.btn-back:hover {
    border-color: var(--accent);
    color: var(--text);
    background: rgba(46, 204, 113, 0.05);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .stream-grid-mixed { grid-template-columns: repeat(2, 1fr); }
    .stream-item.horizontal, .stream-item.vertical { 
        grid-column: span 2; 
    }
    .album-header-especifico h1 { letter-spacing: 10px; }
}