:root {
    --primary: #c0392b;
    --primary-dark: #a93226;
    --secondary: #e67e22;
    --dark: #2c3e50;
    --darker: #1a252f;
    --light: #f8f9fa;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border: #dee2e6;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Vazirmatn', 'IRANSans', Tahoma, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--light);
    color: #333;
    line-height: 1.8;
    direction: rtl;
}

/* ===== HEADER ===== */
.app-header {
    background: linear-gradient(135deg, var(--dark), var(--darker));
    color: #fff;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0,0,0,0.2);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #fff;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.logo-text { font-size: 22px; font-weight: 800; }

.search-box {
    flex: 1;
    max-width: 400px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 12px 45px 12px 15px;
    border: 2px solid transparent;
    border-radius: 25px;
    font-family: var(--font);
    font-size: 14px;
    background: rgba(255,255,255,0.12);
    color: #fff;
    transition: var(--transition);
    outline: none;
}

.search-box input::placeholder { color: rgba(255,255,255,0.5); }

.search-box input:focus {
    background: rgba(255,255,255,0.2);
    border-color: var(--secondary);
}

.search-box .search-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255,255,255,0.5);
    font-size: 18px;
}

.cart-btn {
    position: relative;
    background: var(--primary);
    border: none;
    color: #fff;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-family: var(--font);
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.cart-btn:hover { background: var(--primary-dark); transform: translateY(-2px); }

.cart-count {
    background: #fff;
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== CATEGORY TABS ===== */
.category-bar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 80px;
    z-index: 900;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.category-bar::-webkit-scrollbar { height: 0; }

.category-tabs {
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    gap: 8px;
}

.category-tab {
    padding: 8px 22px;
    border: 2px solid var(--border);
    border-radius: 25px;
    background: #fff;
    color: var(--gray);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.category-tab:hover { border-color: var(--primary); color: var(--primary); }

.category-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ===== MAIN ===== */
.main-content {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

.section-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 5px;
}

.section-subtitle {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 25px;
}

/* ===== MENU GRID ===== */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.menu-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    animation: fadeInUp 0.4s ease both;
}

.menu-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.menu-card .card-img-wrap {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.menu-card .card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.menu-card:hover .card-img { transform: scale(1.08); }

.menu-card .card-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--secondary);
    color: #fff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(230,126,34,0.4);
}

.menu-card .card-body { padding: 20px; }

.menu-card .card-category {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 5px;
}

.menu-card .card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.menu-card .card-desc {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.menu-card .card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--gray-light);
}

.menu-card .price {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary);
}

.menu-card .price .old-price {
    font-size: 14px;
    color: var(--gray);
    text-decoration: line-through;
    font-weight: 400;
    margin-right: 8px;
}

.menu-card .prep-time {
    font-size: 12px;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 4px;
}

.menu-card .add-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.menu-card .add-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.unavailable-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    font-weight: 800;
}

/* ===== MODAL ===== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 2000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.modal-overlay.show { display: flex; align-items: center; justify-content: center; }

.modal {
    background: #fff;
    border-radius: var(--radius);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: scaleIn 0.3s ease;
}

.modal-img {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.modal-body { padding: 25px; }

.modal-body .modal-category {
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
}

.modal-body .modal-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
    margin: 8px 0 12px;
}

.modal-body .modal-desc {
    color: var(--gray);
    line-height: 2;
    margin-bottom: 20px;
}

.modal-body .modal-details {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.modal-body .detail-item {
    background: var(--light);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--dark);
}

.modal-body .detail-item strong { color: var(--primary); }

.modal-body .modal-price {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
}

.modal-close {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(0,0,0,0.5);
    border: none;
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover { background: rgba(0,0,0,0.7); }

.modal-img-wrap { position: relative; }

/* ===== CART ===== */
.cart-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 3000;
    animation: fadeIn 0.3s ease;
}

.cart-overlay.show { display: block; }

.cart-sidebar {
    position: fixed;
    top: 0;
    left: -380px;
    width: 380px;
    height: 100%;
    background: #fff;
    z-index: 3001;
    box-shadow: -5px 0 30px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.cart-sidebar.open { left: 0; }

.cart-header {
    padding: 20px;
    background: var(--dark);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-header h3 { font-size: 18px; }

.cart-close {
    background: none;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.cart-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray);
}

.cart-empty .empty-icon { font-size: 60px; margin-bottom: 15px; }

.cart-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    border-bottom: 1px solid var(--gray-light);
    animation: fadeIn 0.3s ease;
}

.cart-item-img {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.cart-item-info { flex: 1; }

.cart-item-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--dark);
}

.cart-item-price {
    font-size: 14px;
    color: var(--primary);
    font-weight: 700;
}

.cart-item-qty {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 5px;
}

.cart-item-qty button {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.cart-item-qty button:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.cart-item-qty span {
    font-weight: 700;
    min-width: 20px;
    text-align: center;
}

.cart-item-remove {
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 16px;
    padding: 0 5px;
    transition: var(--transition);
}

.cart-item-remove:hover { color: var(--primary); }

.cart-footer {
    padding: 20px;
    border-top: 2px solid var(--gray-light);
    background: var(--light);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 18px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 15px;
}

.cart-total .total-price { color: var(--primary); }

.checkout-btn {
    width: 100%;
    padding: 14px;
    border: none;
    background: var(--primary);
    color: #fff;
    font-family: var(--font);
    font-size: 16px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.checkout-btn:hover { background: var(--primary-dark); }

/* ===== FOOTER ===== */
.app-footer {
    background: var(--dark);
    color: #ccc;
    padding: 30px 0;
    margin-top: 60px;
    text-align: center;
    font-size: 14px;
}

/* ===== LOADING ===== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-text { margin-top: 15px; color: var(--gray); font-size: 14px; }

/* ===== ERROR ===== */
.error-container {
    text-align: center;
    padding: 60px 20px;
}

.error-container .error-icon { font-size: 64px; margin-bottom: 15px; }

.error-container h3 { color: var(--dark); margin-bottom: 8px; }

.error-container p { color: var(--gray); margin-bottom: 20px; }

.retry-btn {
    padding: 10px 30px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.retry-btn:hover { background: var(--primary-dark); }

/* ===== ANIMATIONS ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== TOAST ===== */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 5000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--dark);
    color: #fff;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    animation: slideInLeft 0.3s ease;
    max-width: 350px;
}

.toast.success { background: #27ae60; }
.toast.error { background: #e74c3c; }

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .header-inner { flex-wrap: wrap; }
    .search-box { order: 3; flex: 0 0 100%; max-width: 100%; }
    .logo-text { font-size: 18px; }
    .menu-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 15px; }
    .cart-sidebar { width: 100%; left: -100%; }
    .modal { width: 95%; }
    .modal-img { height: 200px; }
    .section-title { font-size: 20px; }
}

@media (max-width: 480px) {
    .menu-grid { grid-template-columns: 1fr; }
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--light); }
::-webkit-scrollbar-thumb { background: var(--gray-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray); }