/* ============================================
   Colecciones y Diarios — Estilos
   Modo claro/oscuro + responsive mobile-first
   ============================================ */

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

/* ---- Variables: Tema Claro (default) ---- */
:root {
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-bg: #f1f5f9;
    --color-card: #ffffff;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-danger: #dc2626;
    --color-danger-hover: #b91c1c;
    --color-danger-bg: #fef2f2;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-warning: #f59e0b;
    --color-warning-hover: #d97706;
    --color-tab-active: #2563eb;
    --color-tab-inactive: #e2e8f0;
    --color-tab-inactive-hover: #cbd5e1;
    --color-lanzamiento: #16a34a;
    --color-lanzamiento-bg: #dcfce7;
    --color-recirculada: #ea580c;
    --color-recirculada-bg: #fff7ed;
    --color-tier-bg: #f8fafc;
    --color-placeholder: #e2e8f0;
    --color-overlay: rgba(0, 0, 0, 0.5);
    --color-header-text: #ffffff;
    --color-btn-edit: #f59e0b;
    --color-btn-edit-hover: #d97706;
    --radius: 8px;
    --radius-sm: 6px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

/* ---- Tema Oscuro (manual o auto) ---- */
[data-theme="dark"] {
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-primary-light: #1e3a5f;
    --color-bg: #0f172a;
    --color-card: #1e293b;
    --color-text: #e2e8f0;
    --color-text-light: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-border-light: #1e293b;
    --color-danger: #ef4444;
    --color-danger-hover: #f87171;
    --color-danger-bg: #450a0a;
    --color-success: #22c55e;
    --color-success-bg: #052e16;
    --color-warning: #fbbf24;
    --color-warning-hover: #fcd34d;
    --color-tab-active: #3b82f6;
    --color-tab-inactive: #334155;
    --color-tab-inactive-hover: #475569;
    --color-lanzamiento: #4ade80;
    --color-lanzamiento-bg: #052e16;
    --color-recirculada: #fb923c;
    --color-recirculada-bg: #431407;
    --color-tier-bg: #1e293b;
    --color-placeholder: #334155;
    --color-overlay: rgba(0, 0, 0, 0.7);
    --color-header-text: #e2e8f0;
    --color-btn-edit: #f59e0b;
    --color-btn-edit-hover: #fbbf24;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
}

/* Auto-detección OS (si no hay preferencia manual guardada) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-primary: #3b82f6;
        --color-primary-hover: #60a5fa;
        --color-primary-light: #1e3a5f;
        --color-bg: #0f172a;
        --color-card: #1e293b;
        --color-text: #e2e8f0;
        --color-text-light: #94a3b8;
        --color-text-muted: #64748b;
        --color-border: #334155;
        --color-border-light: #1e293b;
        --color-danger: #ef4444;
        --color-danger-hover: #f87171;
        --color-danger-bg: #450a0a;
        --color-success: #22c55e;
        --color-success-bg: #052e16;
        --color-warning: #fbbf24;
        --color-warning-hover: #fcd34d;
        --color-tab-active: #3b82f6;
        --color-tab-inactive: #334155;
        --color-tab-inactive-hover: #475569;
        --color-lanzamiento: #4ade80;
        --color-lanzamiento-bg: #052e16;
        --color-recirculada: #fb923c;
        --color-recirculada-bg: #431407;
        --color-tier-bg: #1e293b;
        --color-placeholder: #334155;
        --color-overlay: rgba(0, 0, 0, 0.7);
        --color-header-text: #e2e8f0;
        --color-btn-edit: #f59e0b;
        --color-btn-edit-hover: #fbbf24;
        --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
    }
}

/* ---- Base ---- */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.5;
    transition: background-color 0.3s, color 0.3s;
}

/* ---- Header ---- */
header {
    background-color: var(--color-primary);
    color: var(--color-header-text);
    text-align: center;
    padding: 1rem 1rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: background-color 0.3s;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    flex: 1;
}

/* Toggle tema */
.theme-toggle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s, border-color 0.2s;
    line-height: 1;
}
.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.7);
}
.theme-toggle:active { transform: scale(0.92); }

/* ---- Navegación ---- */
nav {
    display: flex;
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    padding: 0.5rem;
    gap: 0.5rem;
    justify-content: center;
    position: sticky;
    top: 0;
    z-index: 50;
    transition: background-color 0.3s, border-color 0.3s;
}

.tab-btn {
    padding: 0.5rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    background: var(--color-tab-inactive);
    color: var(--color-text);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    min-height: 42px;
}
.tab-btn:hover { background: var(--color-tab-inactive-hover); }
.tab-btn.active {
    background: var(--color-tab-active);
    color: white;
}

/* ---- Main ---- */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem;
    transition: background-color 0.3s;
}

/* ---- Búsqueda ---- */
.search-container { margin-bottom: 0.75rem; }
.search-container input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    outline: none;
    background: var(--color-card);
    color: var(--color-text);
    transition: border-color 0.2s, background-color 0.3s, color 0.3s;
    -webkit-appearance: none;
}
.search-container input::placeholder { color: var(--color-text-muted); }
.search-container input:focus { border-color: var(--color-primary); }

/* ---- Product Grid ---- */
.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.625rem;
    margin-bottom: 0.75rem;
}

.product-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.875rem;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, background-color 0.3s, border-color 0.3s;
    text-align: center;
    -webkit-tap-highlight-color: transparent;
}
.product-card:active { transform: scale(0.97); }

.product-card h3 {
    font-size: 1rem;
    margin: 0.5rem 0;
    color: var(--color-text);
}

.product-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.product-badge.lanzamiento { background: var(--color-lanzamiento-bg); color: var(--color-lanzamiento); }
.product-badge.recirculada { background: var(--color-recirculada-bg); color: var(--color-recirculada); }

.product-tiers {
    margin-top: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.12rem;
}
.product-tier {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    padding: 0.2rem 0.6rem;
    background: var(--color-tier-bg);
    border-radius: 4px;
    transition: background-color 0.3s;
}
.product-tier .tier-label { color: var(--color-text-light); font-weight: 500; }
.product-tier .tier-price { font-weight: 700; color: var(--color-primary); }

/* ---- Selection Area ---- */
.selection-area {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.875rem;
    text-align: center;
    min-height: 3rem;
    color: var(--color-text-light);
    transition: background-color 0.3s, border-color 0.3s;
}
.selection-area .selected-name { font-weight: 700; color: var(--color-text); font-size: 1.05rem; }
.selection-area .selected-tiers {
    margin-top: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1rem;
}
.selection-area .selected-tier { font-size: 0.85rem; }
.selection-area .selected-tier span { font-weight: 700; color: var(--color-primary); }

/* ---- Diary Month Selector ---- */
.diary-month-selector { margin-bottom: 1rem; }
.diary-month-selector label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
}
.diary-month-selector select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    background: var(--color-card);
    color: var(--color-text);
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
    transition: border-color 0.2s, background-color 0.3s, color 0.3s;
    min-height: 44px;
}
.diary-month-selector select:focus { border-color: var(--color-primary); }

/* ---- Diary Grid ---- */
.diary-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.625rem;
}

.diary-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.875rem;
    box-shadow: var(--shadow);
    transition: box-shadow 0.15s, background-color 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
}
.diary-card:active { box-shadow: var(--shadow-md); }

.diary-card-header {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 0.625rem;
}

.diary-card-logo {
    width: 44px;
    height: 44px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: #f8fafc;
    flex-shrink: 0;
}

.diary-card-logo-placeholder {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--color-placeholder);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text-light);
    flex-shrink: 0;
    transition: background-color 0.3s;
}

.diary-card-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.25;
}

/* Precios */
.diary-card-prices {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 0.75rem;
    margin-bottom: 0.625rem;
    flex: 1;
}

.diary-card-price {
    font-size: 0.82rem;
    color: var(--color-text);
    white-space: nowrap;
}
.diary-card-price .dl { color: var(--color-text-light); font-weight: 500; }
.diary-card-price .dp { font-weight: 700; color: var(--color-primary); }
.diary-card-price .ns { font-weight: 600; color: var(--color-danger); }

.diary-card-footer {
    font-size: 0.72rem;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    padding-top: 0.5rem;
    text-align: right;
    transition: border-color 0.3s;
    margin-top: auto;
}

/* ---- Modal / Login ---- */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--color-overlay);
    z-index: 100;
}
.modal-overlay.visible { display: block; }

.modal {
    display: none;
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    width: 92%;
    max-width: 380px;
    z-index: 101;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    transition: background-color 0.3s;
}
.modal.visible { display: block; }
.modal-content h2 {
    margin-bottom: 1rem;
    text-align: center;
    font-size: 1.15rem;
    color: var(--color-text);
}
.modal-content input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    margin-bottom: 0.625rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    outline: none;
    background: var(--color-card);
    color: var(--color-text);
    transition: border-color 0.2s, background-color 0.3s, color 0.3s;
    min-height: 44px;
    -webkit-appearance: none;
}
.modal-content input:focus { border-color: var(--color-primary); }
.login-error {
    color: var(--color-danger);
    text-align: center;
    margin-top: 0.4rem;
    font-weight: 600;
    min-height: 1.25rem;
    font-size: 0.85rem;
}

/* ---- Admin ---- */
.admin-section {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 0.875rem;
    transition: background-color 0.3s, border-color 0.3s;
}
.admin-section h3 {
    margin-bottom: 0.75rem;
    font-size: 1rem;
    color: var(--color-text);
}

/* Formulario admin */
.admin-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.75rem;
}
.admin-form input,
.admin-form select {
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    outline: none;
    width: 100%;
    background: var(--color-card);
    color: var(--color-text);
    transition: border-color 0.2s, background-color 0.3s, color 0.3s;
    min-height: 42px;
    -webkit-appearance: none;
}
.admin-form input:focus,
.admin-form select:focus { border-color: var(--color-primary); }
.admin-form select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}
.admin-form-buttons { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Botones */
.btn-primary {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: 0.5rem 1.125rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
    min-height: 42px;
    white-space: nowrap;
}
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:active { opacity: 0.85; }

.btn-secondary {
    background: var(--color-tab-inactive);
    color: var(--color-text);
    border: none;
    padding: 0.5rem 1.125rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.3s;
    min-height: 42px;
    white-space: nowrap;
}
.btn-secondary:hover { background: var(--color-tab-inactive-hover); }

.btn-danger {
    background: var(--color-danger);
    color: white;
    border: none;
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    min-height: 36px;
    -webkit-tap-highlight-color: transparent;
}
.btn-danger:hover { background: var(--color-danger-hover); }

.btn-edit {
    background: var(--color-btn-edit);
    color: white;
    border: none;
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    margin-right: 0.25rem;
    min-height: 36px;
    -webkit-tap-highlight-color: transparent;
}
.btn-edit:hover { background: var(--color-btn-edit-hover); }

/* Lista de productos admin */
.admin-product-list { display: flex; flex-direction: column; gap: 0.4rem; }
.admin-product-item {
    display: flex;
    flex-direction: column;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    gap: 0.4rem;
    transition: border-color 0.3s, background-color 0.3s;
    background: var(--color-card);
}
.admin-product-item .prod-info { font-weight: 600; display: flex; flex-direction: column; gap: 0.1rem; }
.admin-product-item .prod-info .prod-name { color: var(--color-text); font-size: 0.9rem; }
.admin-product-item .prod-info .prod-prices { font-size: 0.75rem; color: var(--color-text-light); font-weight: 400; line-height: 1.4; }
.admin-product-item .prod-info .prod-prices span { color: var(--color-primary); font-weight: 600; }
.admin-product-item .prod-actions { display: flex; gap: 0.25rem; }

/* Selector mes admin */
.admin-section .diary-month-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}
.admin-section .diary-month-selector select {
    flex: 1 1 auto;
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    background: var(--color-card);
    color: var(--color-text);
    outline: none;
    cursor: pointer;
    min-width: 160px;
    min-height: 40px;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
    transition: border-color 0.2s, background-color 0.3s, color 0.3s;
}
.admin-section .diary-month-selector select:focus { border-color: var(--color-primary); }

/* Grupo edición diario */
.diary-edit-group {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.625rem 0.75rem;
    margin-bottom: 0.625rem;
    transition: border-color 0.3s, background-color 0.3s;
}
.diary-edit-group h4 { margin-bottom: 0.4rem; font-size: 0.95rem; color: var(--color-primary); }
.diary-edit-logo { margin-bottom: 0.4rem; }
.diary-edit-logo label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-light);
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}
.diary-edit-logo input {
    padding: 0.4rem 0.5rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    outline: none;
    background: var(--color-card);
    color: var(--color-text);
    transition: border-color 0.2s, background-color 0.3s, color 0.3s;
    min-height: 38px;
    -webkit-appearance: none;
}
.diary-edit-logo input:focus { border-color: var(--color-primary); }

.diary-edit-fields {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

/* Fila: [☑ día] [precio] */
.day-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.day-check {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-light);
    min-width: 90px;
    cursor: pointer;
    white-space: nowrap;
}
.day-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--color-primary);
    flex-shrink: 0;
}
.day-price {
    flex: 1;
    padding: 0.35rem 0.5rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    outline: none;
    background: var(--color-card);
    color: var(--color-text);
    transition: border-color 0.2s, background-color 0.3s, color 0.3s;
    min-height: 36px;
    max-width: 120px;
    -webkit-appearance: none;
}
.day-price:focus { border-color: var(--color-primary); }

.day-feriado { border-top: 1px dashed var(--color-border); padding-top: 0.35rem; margin-top: 0.1rem; }
.feriado-plus {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 0.9rem;
}

.btn-save-all { margin-top: 0.5rem; width: 100%; }

.admin-msg { text-align: center; margin-top: 0.4rem; font-weight: 600; min-height: 1.5rem; font-size: 0.85rem; }
.admin-msg.success { color: var(--color-success); }
.admin-msg.error { color: var(--color-danger); }

.admin-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1.25rem;
    flex-wrap: wrap;
}

/* ---- No data ---- */
.no-data {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--color-text-light);
    font-style: italic;
    font-size: 0.95rem;
}

/* ============================================
   RESPONSIVE BREAKPOINTS (mobile-first)
   ============================================ */

/* ≥ 400px — Phones grandes */
@media (min-width: 400px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .diary-grid { grid-template-columns: repeat(2, 1fr); }
    .diary-card { padding: 1rem; }
}

/* ≥ 480px */
@media (min-width: 480px) {
    header h1 { font-size: 1.35rem; }
    main { padding: 1rem; }
    .product-card { padding: 1rem; }
    .product-card h3 { font-size: 1.05rem; }
    .product-tier { font-size: 0.88rem; }
    .diary-card { padding: 1.125rem; }
    .diary-card-name { font-size: 1rem; }
    .diary-card-price { font-size: 0.85rem; }
    .diary-card-footer { font-size: 0.75rem; }
    .modal { padding: 2rem; }
    .admin-product-item { flex-direction: row; align-items: center; justify-content: space-between; }
}

/* ≥ 600px */
@media (min-width: 600px) {
    nav { gap: 0.75rem; }
    .tab-btn { padding: 0.5rem 1.5rem; font-size: 0.95rem; min-width: 120px; }
    .diary-edit-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 0.75rem; }
    .admin-section { padding: 1.25rem; }
    .day-check { min-width: 80px; }
}

/* ≥ 768px — Tablets */
@media (min-width: 768px) {
    header h1 { font-size: 1.6rem; }
    main { padding: 1.5rem; }
    .product-grid { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
    .product-card { padding: 1.25rem; }
    .product-card:active { transform: none; }
    .product-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
    .product-card h3 { font-size: 1.15rem; }
    .product-tier { font-size: 0.92rem; }
    .search-container input { font-size: 1rem; padding: 0.75rem 1rem; }
    .diary-month-selector select { width: 50%; }
    .diary-grid { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
    .diary-card { padding: 1.25rem; }
    .diary-card:active { box-shadow: var(--shadow); }
    .diary-card:hover { box-shadow: var(--shadow-lg); }
    .diary-card-name { font-size: 1.05rem; }
    .diary-card-price { font-size: 0.88rem; }
    .diary-card-footer { font-size: 0.78rem; }
    .diary-card-logo,
    .diary-card-logo-placeholder { width: 48px; height: 48px; font-size: 1.3rem; }
    .admin-form { flex-direction: row; flex-wrap: wrap; align-items: flex-end; }
    .admin-form input,
    .admin-form select { flex: 1 1 140px; width: auto; }
    .admin-form-buttons { flex: 0 0 auto; }
    .diary-edit-fields { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0.5rem 0.75rem; }
}

/* ≥ 1024px */
@media (min-width: 1024px) {
    .product-grid { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
    .diary-grid { grid-template-columns: repeat(4, 1fr); gap: 1.125rem; }
    .diary-card-name { font-size: 1.1rem; }
    .diary-card-price { font-size: 0.92rem; }
}

/* ≥ 1200px — Desktop */
@media (min-width: 1200px) {
    header h1 { font-size: 1.8rem; }
    .product-grid { gap: 1.5rem; }
    .product-card { padding: 1.5rem; }
    .product-card h3 { font-size: 1.2rem; }
    .product-tier { font-size: 0.95rem; }
    .diary-grid { grid-template-columns: repeat(5, 1fr); gap: 1.25rem; }
    .diary-card { padding: 1.5rem; }
    .diary-card-name { font-size: 1.15rem; }
    .diary-card-price { font-size: 0.95rem; }
    .diary-card-footer { font-size: 0.8rem; }
    .diary-card-logo,
    .diary-card-logo-placeholder { width: 52px; height: 52px; font-size: 1.4rem; }
    .diary-edit-fields { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 0.5rem 0.75rem; }
    .admin-section { padding: 1.5rem; }
}

/* ============================================
   MOBILE DEVICE (touch-specific)
   ============================================ */

/* Dispositivo táctil: sin efectos hover */
.mobile-device .product-card:hover { transform: none; box-shadow: var(--shadow); }
.mobile-device .diary-card:hover { box-shadow: var(--shadow); }
.mobile-device .btn-primary:hover,
.mobile-device .btn-secondary:hover,
.mobile-device .btn-danger:hover,
.mobile-device .btn-edit:hover { opacity: 1; }

/* Aumentar área táctil */
.mobile-device .tab-btn { min-height: 44px; }
.mobile-device .btn-primary,
.mobile-device .btn-secondary { min-height: 44px; }
.mobile-device .btn-danger,
.mobile-device .btn-edit { min-height: 40px; }
.mobile-device .search-container input { min-height: 44px; }
.mobile-device .diary-month-selector select { min-height: 44px; }

/* Precios más grandes en mobile */
.mobile-device .diary-card-price { font-size: 0.88rem; }
.mobile-device .product-tier { font-size: 0.85rem; padding: 0.2rem 0.6rem; }
.mobile-device .product-tier .tier-label { font-size: 0.82rem; }
.mobile-device .product-tier .tier-price { font-size: 0.9rem; }

/* Ajuste de modal en mobile */
.mobile-device .modal-content input { font-size: 1rem; }