/* ==========================================================================
   MÓDULO: PÁGINAS ESPECIALES, BOTONES DE FILTRO Y RESPONSIVE DESIGN
   ========================================================================== */
.about-section { 
    margin-top: 80px; 
    border-top: 1px solid var(--line-museum); 
    padding-top: 60px; 
    max-width: 750px; /* Un toque más estrecho para mejorar legibilidad */
    margin-left: auto; 
    margin-right: auto; 
}
.section-subtitle { 
    font-size: 0.75rem; 
    color: var(--gold-premium); 
    text-transform: uppercase; 
    letter-spacing: 3px; 
    display: block; 
    margin-bottom: 12px; 
    text-align: center; 
}
.section-title-center { 
    font-family: 'Playfair Display', serif; /* Aplicada fuente premium */
    color: var(--text-pure);
    text-align: center; 
    font-size: 2.2rem; 
    margin-bottom: 35px; 
    letter-spacing: 1px;
}
.about-text { 
    color: var(--text-muted); 
    line-height: 1.9; /* Más aire al bloque de lectura */
    font-size: 1rem; 
    font-weight: 300; 
    text-align: justify; 
    display: flex;
    flex-direction: column;
    gap: 20px; /* Separación limpia entre párrafos */
}

.purchase-experience-section { margin-top: 80px; border-top: 1px solid var(--line-museum); padding-top: 60px; }
.steps-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-top: 40px; }
.step-card { background-color: var(--bg-card); border: 1px solid var(--line-museum); padding: 30px; text-align: left; }
.step-card:hover { border-color: var(--gold-premium); }
.step-number { font-family: 'Playfair Display', serif; font-size: 2.5rem; color: var(--gold-premium); display: block; margin-bottom: 15px; line-height: 1; }
.step-title { font-size: 1.2rem; margin-bottom: 10px; color: var(--text-pure); }
.step-desc { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; margin: 0; }

/* 🎯 REDISEÑO PREMIUM DE LA SECCIÓN DE CONTACTO */
.contact-section { 
    margin-top: 90px; 
    border-top: 1px solid var(--line-museum); 
    padding-top: 60px; 
    text-align: center; 
}
.contact-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 550px;
    margin: 0 auto 35px auto;
    line-height: 1.6;
}
.contact-grid { 
    display: flex; 
    justify-content: center; 
    align-items: center;
    gap: 20px; 
    margin-top: 30px; 
    flex-wrap: wrap; 
}
.contact-item { 
    text-decoration: none; 
    color: var(--gold-premium); 
    background-color: #050505;
    border: 1px solid var(--line-museum);
    padding: 14px 28px;
    font-size: 0.85rem; 
    text-transform: uppercase;
    letter-spacing: 2px;
    display: inline-flex; 
    align-items: center; 
    gap: 10px; 
    transition: all 0.3s ease;
}
.contact-item:hover {
    border-color: var(--gold-premium);
    background-color: var(--gold-premium);
    color: #000000;
}
.contact-item.muted {
    border: none;
    background-color: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 14px 10px;
}

.hero-section { text-align: center; padding: 40px 0 30px 0; max-width: 850px; margin: 0 auto; }
.hero-subtitle { color: var(--gold-premium); text-transform: uppercase; letter-spacing: 3px; font-size: 0.75rem; }
.hero-title { font-size: clamp(2.2rem, 6vw, 4rem); margin-top: 15px; margin-bottom: 20px; }
.hero-description { color: var(--text-muted); line-height: 1.8; font-size: 1.05rem; font-weight: 300; }

.page-intro { text-align: center; max-width: 800px; margin: 0 auto 40px auto; }
.page-description { color: var(--text-muted); line-height: 1.8; font-size: 1rem; font-weight: 300; }

/* Maquetación de Períodos */
.periods-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 20px; }
.period-category-card { text-decoration: none; color: inherit; display: block; }
.period-card-frame { background-color: var(--bg-card); border: 1px solid var(--line-museum); padding: 35px 25px; text-align: center; min-height: 160px; display: flex; flex-direction: column; justify-content: center; align-items: center; }
.period-card-frame:hover { border-color: var(--gold-premium); transform: translateY(-2px); }
.period-card-subtitle { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 2px; color: var(--gold-premium); margin-bottom: 10px; }
.period-card-title { font-size: 1.6rem; color: var(--text-pure); margin: 0 0 12px 0; }
.period-card-desc { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; margin: 0; }

/* Botones Ergonómicos de Lista de Markdown (Catálogo) */
.page-description ul { list-style: none; padding: 0; margin: 30px 0 0 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
.page-description li a { display: block; color: var(--gold-premium); background-color: #050505; border: 1px solid var(--line-museum); padding: 12px 20px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1.5px; text-decoration: none; text-align: center; }
.page-description li a:hover { border-color: var(--gold-premium); background-color: var(--bg-card); color: var(--text-pure); }

/* 📱 ADAPTACIÓN SMARTPHONE (MEDIA QUERIES) */
@media (max-width: 768px) {
    .gallery-container { padding: 20px 12px; }
    .hero-section + main .mosaic-grid, .home-grid-selector .mosaic-grid {
        display: flex; gap: 16px; overflow-x: auto; overflow-y: hidden; scroll-behavior: smooth; -webkit-overflow-scrolling: touch; padding-bottom: 16px; min-height: auto;
        mask-image: linear-gradient(to right, #000 85%, transparent 100%); -webkit-mask-image: linear-gradient(to right, #000 85%, transparent 100%);
    }
    .page-intro + main .mosaic-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; min-height: auto; }
    .museum-card { flex: 0 0 82vw; max-width: 100%; }
    .page-description ul { flex-direction: column; align-items: center; width: 100%; gap: 12px; }
    .page-description li { width: 100%; max-width: 320px; }
    .periods-grid { grid-template-columns: 1fr; gap: 16px; }
    .contact-grid { flex-direction: column; width: 100%; max-width: 300px; margin: 20px auto 0 auto; gap: 12px; }
    .contact-item { width: 100%; justify-content: center; box-sizing: border-box; }
}

@media (max-width: 480px) {
    .page-intro + main .mosaic-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 2rem; }
    .section-title-center { font-size: 1.6rem; }
}