/* ============================================================
   SECCIÓN: GRADUACIONES - DISEÑO GALA PREMIUM (FONDO LISO)
   ============================================================ */

:root {
    --grad-navy: #0f172a;
    /* Azul noche profundo */
    --grad-navy-light: #1e293b;
    --grad-gold: #c5a059;
    /* Oro base */
    --grad-gold-bright: #e2c27d;
    /* Oro brillante */
    --grad-soft-bg: #f8fafc;
}

/* 1. Hero Section: Fondo Liso y Elegante (Sin textura) */
.grad-hero-unique {
    background: linear-gradient(135deg, var(--grad-navy), #1e1b4b);
    padding: 45px 20px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 30px;
    color: white;
    border-bottom: 5px solid var(--grad-gold);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.grad-hero-unique h1 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 2.2rem;
    margin: 0;
}

.grad-hero-unique p {
    font-size: 1rem;
    font-weight: 300;
    font-style: italic;
    color: var(--grad-gold-bright);
    margin-top: 10px;
    letter-spacing: 1px;
}

/* 2. Barra de Menú (Acordeón) */
.filter-toggle-btn {
    width: 100%;
    background: var(--grad-navy) !important;
    color: white !important;
    padding: 20px 25px;
    border: none;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.85rem;
    box-shadow: 0 5px 15px rgba(15, 23, 42, 0.2);
}

/* 3. Contenedor de Filtros (Efecto Contraíble) */
.filters-content {
    max-height: 0;
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.filters-content.open {
    max-height: 1000px;
    padding: 25px 0;
}

/* 4. Botones de Categorías con el "Plus" (Luxury Badges) */
#category-filters {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
    padding: 10px 20px;
}

.category-filter-grad {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px 20px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--grad-navy);
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.category-filter-grad i {
    margin-right: 15px;
    font-size: 1.2rem;
    color: var(--grad-gold);
}

/* HOVER Y ACTIVO: Brillo Dorado y Elevación */
.category-filter-grad:hover,
.category-filter-grad.active {
    background: linear-gradient(135deg, #c5a059 0%, #e2c27d 100%) !important;
    color: white !important;
    border-color: transparent;
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(197, 160, 89, 0.4);
}

.category-filter-grad:hover i,
.category-filter-grad.active i {
    color: white;
    transform: scale(1.2);
}

/* Destello metálico al pasar el mouse */
.category-filter-grad::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: rotate(45deg);
    transition: 0.6s;
}

.category-filter-grad:hover::after {
    left: 120%;
}

/* 5. BOTÓN MAESTRO (CTA) */
.btn-master {
    display: block;
    text-align: center;
    padding: 16px 20px;
    border-radius: 10px;
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1.5px;
    margin-top: 15px;
    transition: all 0.4s ease;
    cursor: pointer;
    background: var(--grad-navy) !important;
    color: white !important;
    border: 1px solid var(--grad-gold);
}

.btn-master:hover {
    background: var(--grad-gold) !important;
    color: white !important;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(197, 160, 89, 0.3);
}

/* 6. Tarjetas de Proveedores */
.provider-card-grad {
    background: #fff;
    border-radius: 15px;
    border: 1px solid #f1f5f9;
    overflow: hidden;
    transition: 0.4s;
    padding: 20px;
}