/* ========== Variables ========== */
:root {
    --primary: #023265;
    --primary-hover: #0056b3;
    --primary-light: #e8f0fb;
    --success: #27ae60;
    --danger: #e74c3c;
    --bg: #f9f9f9;
    --surface: #ffffff;
    --text: #333333;
    --text-muted: #666666;
    --border: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(2, 50, 101, 0.08);
    --shadow: 0 4px 12px rgba(2, 50, 101, 0.1);
    --radius: 10px;
    --radius-sm: 8px;
    --section-gap: 80px;
}

/* ========== Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg);
    padding: 20px;
    color: var(--text);
}

h1 {
    font-family: 'Playfair Display', Georgia, serif;
    color: var(--primary);
    text-align: center;
    font-size: clamp(1.5em, 4vw, 2.5em);
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 0.9em;
}

.subtitle a { color: var(--primary); }

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ========== Back link ========== */
.back-link {
    display: inline-block;
    margin-bottom: 20px;
    padding: 10px 20px;
    background-color: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.back-link:hover { background-color: var(--primary-dark); }

/* ========== Filtros de categoría ========== */
.cat-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-bottom: 12px;
}

.cat-btn {
    padding: 5px 12px;
    border: 2px solid var(--primary);
    background-color: var(--surface);
    color: var(--primary);
    border-radius: 25px;
    cursor: pointer;
    font-size: clamp(0.7em, 1.6vw, 0.85em);
    font-weight: 600;
    transition: all 0.2s ease;
    user-select: none;
}

.cat-btn:hover { background-color: var(--primary-light); }
.cat-btn.active { background-color: var(--primary); color: white; }

/* ========== Dropdown de subcategorías ========== */
.subcat-dropdown {
    position: relative;
    margin-bottom: 20px;
}

.subcat-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
    background-color: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    color: var(--text);
    box-shadow: var(--shadow-sm);
    transition: border-color 0.3s;
    user-select: none;
}

.subcat-toggle:hover { border-color: var(--primary); }

.subcat-toggle .arrow {
    transition: transform 0.3s;
    font-size: 0.8em;
    color: var(--text-muted);
}

.subcat-dropdown.open .subcat-toggle .arrow { transform: rotate(180deg); }

.subcat-panel {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    z-index: 100;
    padding: 12px;
}

.subcat-dropdown.open .subcat-panel { display: block; }

.subcat-search {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    margin-bottom: 10px;
    transition: border-color 0.3s;
    outline: none;
}

.subcat-search:focus { border-color: var(--primary); }

.subcat-list {
    max-height: 260px;
    overflow-y: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 4px 0;
}

.subcat-list::-webkit-scrollbar { width: 6px; }
.subcat-list::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }

.filter-checkbox { display: none; }

.filter-label {
    display: inline-block;
    padding: 6px 14px;
    border: 2px solid var(--primary);
    background-color: var(--surface);
    color: var(--primary);
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: 500;
    user-select: none;
    transition: all 0.2s ease;
}

.filter-label:hover { background-color: var(--primary-light); }
.filter-checkbox:checked + .filter-label { background-color: var(--primary); color: white; }

.filter-item { display: inline; }
.filter-item.hidden { display: none; }

.subcat-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #eee;
}

.subcat-actions button {
    flex: 1;
    padding: 7px 12px;
    border: 1px solid #ccc;
    background: #f5f5f5;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85em;
    transition: background 0.2s;
}

.subcat-actions button:hover { background: #e0e0e0; }

.subcat-no-results {
    padding: 12px;
    text-align: center;
    color: #999;
    font-size: 0.9em;
}

.subcat-selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 10px;
}

.subcat-selected-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background-color: var(--primary);
    color: white;
    border-radius: 20px;
    font-size: 0.8em;
    font-weight: 500;
}

.subcat-selected-tag .remove-tag {
    cursor: pointer;
    font-weight: 700;
    font-size: 1.1em;
    line-height: 1;
    opacity: 0.8;
}

.subcat-selected-tag .remove-tag:hover { opacity: 1; }

/* ========== Búsqueda ========== */
.search-box {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.search-input {
    padding: 10px 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    width: 300px;
    transition: border-color 0.3s;
    outline: none;
}

.search-input:focus { border-color: var(--primary); }

.sort-select {
    padding: 10px 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    background-color: var(--surface);
    cursor: pointer;
    transition: border-color 0.3s;
    outline: none;
}

.sort-select:focus { border-color: var(--primary); }

/* ========== Tabla ========== */
table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--surface);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
    overflow: hidden;
}

thead { background-color: var(--primary); color: white; }

th {
    padding: 15px 10px;
    text-align: left;
    font-size: clamp(0.8em, 2vw, 1em);
}

td {
    padding: 12px 10px;
    border-bottom: 1px solid #eee;
    font-size: clamp(0.8em, 2vw, 0.95em);
    vertical-align: middle;
}

tr:hover { background-color: var(--primary-light); }
tr:last-child td { border-bottom: none; }

.product-image {
    width: 70px;
    height: 70px;
    object-fit: contain;
    border-radius: 8px;
    background-color: #f5f5f5;
}

.product-name { font-weight: 600; color: var(--text); }

.category-tag {
    display: inline-block;
    padding: 2px 8px;
    background-color: var(--primary-light);
    color: var(--primary);
    border-radius: 15px;
    font-size: 0.75em;
    font-weight: 500;
    margin: 1px 2px;
}

.price-tag { font-weight: 700; color: var(--success); font-size: 1.1em; }

.price-original {
    text-decoration: line-through;
    color: #999;
    font-size: 0.85em;
    font-weight: 400;
}

.sale-badge {
    display: inline-block;
    padding: 2px 6px;
    background-color: var(--danger);
    color: white;
    border-radius: 4px;
    font-size: 0.7em;
    font-weight: 700;
    margin-left: 4px;
}

.stock-text { font-size: 0.8em; color: var(--text-muted); }
.stock-text.out { color: var(--danger); font-weight: 600; }

.buy-link {
    display: inline-block;
    padding: 8px 16px;
    background-color: #ff6600;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.85em;
    font-weight: 500;
    transition: background-color 0.3s, transform 0.2s;
}

.buy-link:hover { background-color: #cc5200; transform: translateY(-1px); }

/* ========== Estados ========== */
.loading {
    text-align: center;
    padding: 40px;
    font-size: 1.2em;
    color: var(--text-muted);
}

.loading::after {
    content: '';
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20%  { content: '.'; }
    40%      { content: '..'; }
    60%, 100%{ content: '...'; }
}

.error {
    text-align: center;
    padding: 40px;
    font-size: 1.2em;
    color: #ff5c5c;
    background-color: #ffe6e6;
    border-radius: var(--radius);
}

.no-results {
    text-align: center;
    padding: 40px;
    font-size: 1.1em;
    color: var(--text-muted);
    background-color: #f0f0f0;
    border-radius: var(--radius);
}

.results-count {
    text-align: center;
    margin-bottom: 15px;
    color: var(--text-muted);
    font-size: 0.95em;
}

/* ========== Responsive ========== */

/* Tablet */
@media (max-width: 900px) {
    body { padding: 16px; }
    .container { padding: 0; }
    .search-input { width: 220px; }

    /* Ocultar columna imagen en tablet para ganar espacio */
    th:first-child, td:first-child { display: none; }
}

/* Mobile */
@media (max-width: 600px) {
    body { padding: 12px; }
    h1 { font-size: 1.4em; margin-bottom: 6px; }

    /* Filtros */
    .cat-btn { padding: 4px 10px; font-size: 0.75em; }
    .filter-label { padding: 5px 10px; font-size: 0.8em; }

    /* Subcategorías: bottom sheet en mobile */
    .subcat-panel {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        border-radius: 16px 16px 0 0;
        max-height: 75vh;
        overflow-y: auto;
    }
    .subcat-list { max-height: 45vh; }

    /* Búsqueda */
    .search-box {
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        gap: 8px;
    }
    .search-input,
    .sort-select {
        width: 100%;
        font-size: 16px; /* Evita zoom en iOS */
    }

    /* Tabla: ocultar columnas no esenciales */
    th:first-child, td:first-child { display: none; } /* imagen */
    th:nth-child(3), td:nth-child(3) { display: none; } /* categoría */
    th, td { padding: 8px 6px; }

    /* Precios y acciones */
    .buy-link { padding: 6px 10px; font-size: 0.78em; }
    .price-tag { font-size: 0.95em; }

    /* Back link */
    .back-link { padding: 8px 14px; font-size: 0.88em; }
}

/* ========== Estilos exclusivos de fundas-lanzadas ========== */

/* Filtros de marca */
.filter-btn {
    padding: 10px 20px;
    border: 2px solid var(--primary);
    background-color: var(--surface);
    color: var(--primary);
    border-radius: 25px;
    cursor: pointer;
    font-size: clamp(0.8em, 2vw, 1em);
    font-weight: 500;
    transition: all 0.2s ease;
}

.filter-btn:hover { background-color: var(--primary-light); }
.filter-btn.active { background-color: var(--primary); color: white; }

/* Tabs de fuente */
.source-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.source-tab {
    padding: 12px 25px;
    border: 2px solid var(--primary);
    background-color: var(--surface);
    color: var(--primary);
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.2s ease;
}

.source-tab:first-child { border-radius: 8px 0 0 8px; }
.source-tab:last-child  { border-radius: 0 8px 8px 0; border-left: none; }
.source-tab:hover       { background-color: var(--primary-light); }
.source-tab.active      { background-color: var(--primary); color: white; }

/* Botón de búsqueda */
.search-btn {
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, transform 0.15s;
}

.search-btn:hover    { background: var(--primary-hover); transform: translateY(-1px); }
.search-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Paginación */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-top: 20px;
    padding: 15px;
    background-color: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.pagination-btn {
    padding: 10px 25px;
    border: none;
    background-color: var(--primary);
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: background 0.2s;
}

.pagination-btn:hover:not(:disabled) { background-color: var(--primary-hover); }
.pagination-btn:disabled             { background-color: #ccc; cursor: not-allowed; }

.pagination-info { font-size: 1em; color: var(--text); font-weight: 500; }

/* Celulares */
.phone-image {
    width: 60px;
    height: 80px;
    object-fit: contain;
    border-radius: 5px;
    background-color: #f5f5f5;
}

.phone-name  { font-weight: 600; color: var(--text); }

.brand-tag {
    display: inline-block;
    padding: 3px 10px;
    background-color: var(--primary-light);
    color: var(--primary);
    border-radius: 15px;
    font-size: 0.85em;
    font-weight: 500;
}

.release-date  { font-size: 0.9em; color: #555; }
.loading-date  { color: #999; font-style: italic; }

.gsm-link {
    display: inline-block;
    padding: 5px 12px;
    background-color: #ff6600;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.85em;
    font-weight: 500;
    transition: background-color 0.2s;
}

.gsm-link:hover { background-color: #cc5200; }

/* Responsive fundas-lanzadas */
@media (max-width: 600px) {
    .phone-image { width: 45px; height: 60px; }
    .filter-btn  { padding: 8px 15px; font-size: 0.85em; }
    .source-tab  { padding: 10px 16px; font-size: 0.88em; }
    .pagination  { flex-wrap: wrap; }
    .search-btn  { width: 100%; max-width: 280px; }
}