/* === SECCIÓN 1: CONFIGURACIÓN INICIAL Y VARIABLES === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

:root {
    --primary-color: #ff6b35; --secondary-color: #ffa726; --accent-color: #ff8f65;
    --success-color: #4caf50; --danger-color: #f44336; --warning-color: #ff9800;
    --info-color: #2196f3; --light-color: #ffffff; --dark-color: #1a1a1a;
    --gray-100: #f8f9fa; --gray-200: #e9ecef; --gray-300: #dee2e6; --gray-400: #ced4da;
    --gray-500: #adb5bd; --gray-600: #6c757d; --gray-700: #495057; --gray-800: #343a40;
    --gray-900: #212529; --shadow: 0 4px 6px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1); --border-radius: 12px;
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
}

[data-theme="dark"] {
    --light-color: #1a1a1a; --dark-color: #ffffff; --gray-100: #2d2d2d; --gray-200: #3a3a3a;
    --gray-300: #4a4a4a; --gray-400: #5a5a5a; --gray-500: #6a6a6a; --gray-600: #7a7a7a;
    --gray-700: #8a8a8a; --gray-800: #9a9a9a; --gray-900: #aaaaaa;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--light-color) 0%, var(--gray-100) 100%);
    color: var(--dark-color);
    transition: background var(--transition-normal), color var(--transition-normal);
    min-height: 100vh;
}

/* REFINAMIENTO UX: Clase para bloquear el scroll cuando hay un panel abierto */
.body-no-scroll {
    overflow: hidden;
}


/* === SECCIÓN 2: COMPONENTES PRINCIPALES (HEADER, SIDEBAR, ETC.) === */
.header {
    background: var(--light-color); padding: 1rem 2rem; box-shadow: var(--shadow);
    position: sticky; top: 0; z-index: 1000; transition: background var(--transition-normal);
}
.header-container {
    display: flex; align-items: center; justify-content: space-between;
    max-width: 1200px; margin: 0 auto;
}
.search-container { flex: 1; max-width: 500px; margin: 0 2rem; position: relative; }
.search-input {
    width: 100%; padding: 0.75rem 1rem 0.75rem 3rem; border: 2px solid var(--gray-300);
    border-radius: 25px; font-size: 1rem; background: var(--gray-100);
    transition: var(--transition-normal); color: var(--dark-color);
}
.search-input:focus {
    outline: none; border-color: var(--primary-color); background: var(--light-color);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.15); /* Efecto de foco mejorado */
}
.search-icon { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--gray-500); font-size: 1.1rem; }

.sidebar {
    position: fixed; left: -300px; top: 0; width: 300px; height: 100vh;
    background: var(--light-color); box-shadow: var(--shadow-lg); z-index: 2000; padding: 2rem 0;
    transition: var(--transition-normal);
}
.sidebar.active { left: 0; }
.sidebar-header { padding: 0 2rem 2rem; border-bottom: 1px solid var(--gray-300); margin-bottom: 1rem; }
.sidebar-title { font-size: 1.5rem; font-weight: 700; color: var(--primary-color); margin-bottom: 0.5rem; }
.sidebar-menu { list-style: none; }
.sidebar-menu li { margin: 0.5rem 0; }
.sidebar-menu a {
    display: flex; align-items: center; padding: 1rem 2rem; color: var(--dark-color);
    text-decoration: none; font-weight: 500; transition: var(--transition-fast);
}
.sidebar-menu a:hover { background: var(--gray-100); color: var(--primary-color); transform: translateX(5px); }
.sidebar-menu i { margin-right: 1rem; font-size: 1.2rem; }
.theme-toggle { display: flex; align-items: center; justify-content: space-between; padding: 1rem 2rem; cursor: pointer; transition: background var(--transition-fast); }
.theme-toggle:hover { background: var(--gray-100); }
.toggle-switch {
    position: relative; width: 50px; height: 25px; background: var(--gray-400);
    border-radius: 15px; cursor: pointer; transition: var(--transition-normal);
}
.toggle-switch::before {
    content: ''; position: absolute; top: 2px; left: 2px; width: 21px; height: 21px;
    background: white; border-radius: 50%; transition: var(--transition-normal);
}
.toggle-switch.active { background: var(--primary-color); }
.toggle-switch.active::before { transform: translateX(25px); }
.overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.5);
    z-index: 1500; opacity: 0; visibility: hidden; transition: opacity var(--transition-normal);
}
.overlay.active { opacity: 1; visibility: visible; }


/* === SECCIÓN 3: BOTONES Y ELEMENTOS INTERACTIVOS === */
.menu-btn {
    background: none; border: none; font-size: 1.5rem; color: var(--primary-color);
    cursor: pointer; padding: 0.5rem; border-radius: var(--border-radius); transition: var(--transition-normal);
}
.menu-btn:hover { background: var(--gray-100); transform: scale(1.1); }

.cart-btn {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color)); color: white; border: none;
    padding: 0.75rem 1.5rem; border-radius: 25px; cursor: pointer; font-size: 1rem; font-weight: 600;
    position: relative; box-shadow: var(--shadow); transition: var(--transition-fast);
}
.cart-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.cart-count {
    position: absolute; top: -8px; right: -8px; background: var(--danger-color); color: white;
    border-radius: 50%; width: 20px; height: 20px; font-size: 0.75rem; display: flex;
    align-items: center; justify-content: center; animation: pulse 2s infinite;
}
.filters-nav { background: var(--light-color); padding: 1rem 2rem; box-shadow: var(--shadow); margin-bottom: 2rem; }
.filters-container { max-width: 1200px; margin: 0 auto; display: flex; gap: 1rem; overflow-x: auto; padding: 0.5rem 0; }
.filter-btn {
    background: var(--gray-100); color: var(--gray-700); border: none; padding: 0.75rem 1.5rem;
    border-radius: 25px; cursor: pointer; font-weight: 500; white-space: nowrap;
    border: 2px solid transparent; transition: var(--transition-fast);
}
.filter-btn:hover, .filter-btn.active {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color)); color: white;
    transform: translateY(-2px); box-shadow: var(--shadow);
}
.quantity-btn {
    background: var(--gray-200); border: none; width: 40px; height: 40px;
    font-size: 1.5rem; border-radius: 50%; cursor: pointer; transition: var(--transition-fast);
}
.quantity-btn:hover { background: var(--gray-300); }

/* REFINAMIENTO UX: Efecto de "presionado" en botones */
.filter-btn:active, .cart-btn:active, .add-to-cart-btn:active, .checkout-btn:active, .quantity-btn:active {
    transform: scale(0.97);
    box-shadow: none;
}


/* === SECCIÓN 4: TARJETAS DE RESTAURANTES Y GRID === */
.restaurants-section { padding: 2rem; max-width: 1200px; margin: 0 auto; }
.section-title { font-size: 2rem; font-weight: 700; color: var(--dark-color); margin-bottom: 1.5rem; text-align: center; }
.restaurants-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 2rem; }
.restaurant-card {
    background: var(--light-color); border-radius: var(--border-radius); box-shadow: var(--shadow);
    overflow: hidden; cursor: pointer; position: relative;
    display: flex; flex-direction: column; opacity: 0; /* Oculta por defecto para animación */
    animation: fadeInUp 0.5s ease-out forwards; /* Animación de entrada */
}
.restaurant-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.card-image { width: 100%; height: 200px; object-fit: cover; transition: transform var(--transition-normal); }
.restaurant-card:hover .card-image { transform: scale(1.05); }
.card-content { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; }
.restaurant-name { font-size: 1.3rem; font-weight: 700; color: var(--dark-color); margin-bottom: 0.5rem; }
.restaurant-type { color: var(--gray-600); font-weight: 500; margin-bottom: 0.75rem; }
.rating { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; }
.stars { display: flex; gap: 0.2rem; }
.star { color: var(--warning-color); font-size: 0.9rem; }
.rating-text { color: var(--gray-600); font-size: 0.9rem; }
.specialties { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.specialty-tag {
    background: var(--gray-100); color: var(--gray-700); padding: 0.3rem 0.8rem;
    border-radius: 15px; font-size: 0.8rem; font-weight: 500;
}
.card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.delivery-info { color: var(--gray-600); font-size: 0.9rem; }
.favorite-btn {
    background: none; border: none; font-size: 1.5rem; color: var(--gray-400);
    cursor: pointer; padding: 0.5rem; border-radius: 50%;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* Curva de rebote */
}
.favorite-btn:hover { transform: scale(1.1); }
.favorite-btn.active { color: var(--danger-color); animation: heartbeat 1.5s infinite ease-in-out; }


/* === SECCIÓN 5: PANELES LATERALES (DETALLE Y CARRITO) === */
.detail-screen, .cart-screen {
    position: fixed; top: 0; width: 100%; height: 100vh;
    background: var(--light-color); z-index: 3000;
    display: flex; flex-direction: column;
    box-shadow: var(--shadow-lg);
    /* REFINAMIENTO UX: Transición de panel mejorada */
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.detail-screen { left: 0; transform: translateX(-100%); }
.cart-screen { right: 0; max-width: 420px; transform: translateX(100%); }
.detail-screen.active, .cart-screen.active { transform: translateX(0); }

/* --- Estilos de Detalle y Carrito --- */
.detail-header, .cart-header { display: flex; align-items: center; padding: 1rem 1.5rem; border-bottom: 1px solid var(--gray-200); flex-shrink: 0; }
.back-btn { background: none; border: none; font-size: 1.5rem; color: var(--primary-color); cursor: pointer; margin-right: 1rem; }
.detail-content, .cart-content { padding: 1.5rem; flex-grow: 1; overflow-y: auto; }
.detail-image { width: 100%; height: 250px; object-fit: cover; border-radius: var(--border-radius); margin-bottom: 1.5rem; }
.detail-title, .cart-title { font-size: 1.5rem; font-weight: 700; }
.detail-title { font-size: 2rem; }
.detail-description { color: var(--gray-700); margin-bottom: 1.5rem; line-height: 1.6; }
.detail-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
.info-item { background: var(--gray-100); padding: 1rem; border-radius: var(--border-radius); text-align: center; }
.info-item i { font-size: 1.5rem; color: var(--primary-color); margin-bottom: 0.5rem; }
.info-item h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.25rem; }
.info-item p { font-size: 0.9rem; color: var(--gray-600); }
.quantity-selector { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-bottom: 1.5rem; }
.quantity-display { font-size: 1.5rem; font-weight: 600; min-width: 30px; text-align: center; }
.pickup-option { text-align: center; font-size: 0.9rem; background: var(--success-color); color: white; padding: 0.75rem; border-radius: var(--border-radius); }
.pickup-option i { margin-right: 0.5rem; }
.detail-footer { padding: 1.5rem; border-top: 1px solid var(--gray-200); background: var(--light-color); flex-shrink: 0; }
.add-to-cart-btn {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white; border: none; width: 100%; padding: 1rem; border-radius: var(--border-radius);
    font-size: 1.2rem; font-weight: 600; cursor: pointer; box-shadow: var(--shadow);
    display: flex; justify-content: space-between; align-items: center; transition: var(--transition-fast);
}
.add-to-cart-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.add-to-cart-btn.in-cart { background: var(--gray-600); cursor: not-allowed; }

.empty-cart { text-align: center; padding: 3rem 0; }
.empty-cart i { font-size: 4rem; color: var(--gray-300); margin-bottom: 1rem; }
.empty-cart h3 { font-size: 1.5rem; color: var(--gray-600); }
.cart-item { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; }
.cart-item-image { width: 70px; height: 70px; object-fit: cover; border-radius: var(--border-radius); }
.cart-item-details { flex-grow: 1; }
.cart-item-name { font-weight: 600; margin-bottom: 0.25rem; }
.cart-item-price { color: var(--gray-600); font-size: 0.9rem; }
.remove-item-btn { background: none; border: none; color: var(--danger-color); font-size: 1.2rem; cursor: pointer; }
.cart-footer-summary { padding: 1.5rem; border-top: 1px solid var(--gray-200); background: var(--light-color); }
.summary-row { display: flex; justify-content: space-between; margin-bottom: 0.75rem; font-size: 1rem; }
.summary-row.total { font-size: 1.3rem; font-weight: 700; margin-top: 1rem; }
.checkout-btn {
    background: linear-gradient(45deg, var(--success-color), #388e3c);
    color: white; border: none; width: 100%; padding: 1rem; border-radius: var(--border-radius);
    font-size: 1.2rem; font-weight: 600; cursor: pointer; box-shadow: var(--shadow);
    margin-top: 1rem; transition: var(--transition-fast);
}
.checkout-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.checkout-btn:disabled { background: var(--gray-400); cursor: not-allowed; box-shadow: none; transform: none; }


/* === SECCIÓN 6: ANIMACIONES Y COMPONENTES DE FEEDBACK === */

/* Animación de entrada para las tarjetas */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* Animación de pulso para el contador del carrito */
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.1); } }

/* REFINAMIENTO UX: Animación de latido para el botón de favorito */
@keyframes heartbeat { 0%, 100% { transform: scale(1); } 10%, 30% { transform: scale(1.2); } 20%, 40% { transform: scale(1); } }

/* REFINAMIENTO UX: Skeleton Loaders */
.skeleton-card { background-color: var(--light-color); border-radius: var(--border-radius); box-shadow: var(--shadow); overflow: hidden; }
.skeleton-card .skeleton-image { width: 100%; height: 200px; background-color: var(--gray-200); }
.skeleton-card .skeleton-content { padding: 1.5rem; }
.skeleton-card .skeleton-line { background-color: var(--gray-200); border-radius: 4px; height: 1.2rem; margin-bottom: 1rem; }
.skeleton-card .skeleton-line.short { width: 60%; height: 1rem; }
.skeleton-card .skeleton-line.medium { width: 80%; }
.skeleton-card .skeleton-image, .skeleton-card .skeleton-line { animation: skeleton-pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite; }
@keyframes skeleton-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }

/* REFINAMIENTO UX: Notificaciones */
.notification {
    position: fixed; top: 20px; left: 50%; transform: translateX(-50%); padding: 1rem 2rem;
    border-radius: 8px; color: white; z-index: 5000; font-weight: 500;
    box-shadow: 0 5px 15px rgba(0,0,0,0.15); display: none;
    animation: slideDown 0.5s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
.notification.show { display: block; }
@keyframes slideDown { from { opacity: 0; transform: translate(-50%, -100px); } to { opacity: 1; transform: translate(-50%, 20px); } }


/* === SECCIÓN 7: RESPONSIVIDAD (MEDIA QUERIES) === */
@media (max-width: 768px) {
    .header { padding: 1rem; }
    .search-container { margin: 0 1rem; }
    .restaurants-section { padding: 1rem; }
    .restaurants-grid { grid-template-columns: 1fr; }
    .detail-screen { transform: translateX(-100vw); } /* Ajuste para pantalla completa */
    .cart-screen, .detail-screen { max-width: 100%; }
}