/* =========================================
   1. ESTILOS PRINCIPALES Y ESTRUCTURA BASE
   ========================================= */

body {
    background-color: #2A2A3A;
    color: #f4f4f4;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    line-height: 1.6;
}

header {
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid #333;
}

nav a {
    color: #999;
    text-decoration: none;
    margin: 0 15px;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: 0.3s;
}

nav a:hover {
    color: #fff;
}

.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 20px;
}

footer {
    text-align: center;
    padding: 3rem;
    color: #666;
    font-size: 0.8rem;
}

/* =========================================
   2. ESTILOS DE LA GALERÍA (REJILLA)
   ========================================= */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.gallery-item img {
    width: 100%;
    height: auto;
    filter: grayscale(20%);
    transition: 0.5s ease;
    cursor: pointer;
}

.gallery-item img:hover {
    filter: grayscale(0%);
    transform: scale(1.02);
}

/* =========================================
   3. ESTILOS PARA EL DOSSIER DEL PROYECTO
   ========================================= */

.dossier-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    font-size: 1.05rem;
    color: #ccc;
}

.dossier-content h2 {
    color: #fff;
    margin-top: 3rem;
    font-size: 2rem;
    text-align: center;
}

.dossier-content h3 {
    color: #eee;
    margin-top: 2.5rem;
    border-bottom: 1px solid #444;
    padding-bottom: 10px;
}

.dossier-content p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.dossier-img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 2rem 0 0.5rem 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.dossier-caption {
    font-size: 0.85rem;
    color: #888;
    text-align: center;
    margin-bottom: 2.5rem;
    font-style: italic;
}