/* MainStream Shop - Минималистичный дизайн */

:root {
    /* Цвета из логотипа */
    --primary-blue: #1e3a8a;      /* Темно-синий из "Main" */
    --accent-cyan: #06b6d4;       /* Светло-голубой из "Stream" */
    --light-blue: #e0f2fe;        /* Очень светлый голубой */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Тени */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Радиусы */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Переходы */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Навигация */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo .logo {
    height: 240px;
    width: auto;
    transition: var(--transition);
}

.nav-logo .logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--gray-600);
    margin: 3px 0;
    transition: var(--transition);
}

/* Основной контент */
.main-content {
    min-height: calc(100vh - 140px);
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Карточки */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* Формы */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-input::placeholder {
    color: var(--gray-400);
}

/* Сетка */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Утилиты */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }
.p-5 { padding: 3rem; }

/* Заголовки */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

/* Футер */
.footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.footer-logo .logo {
    height: 180px;
    width: auto;
}

.footer-text {
    text-align: right;
    color: var(--gray-600);
    font-size: 0.9rem;
}

.footer-text p {
    margin-bottom: 0.25rem;
}

/* Адаптивность */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 1rem;
    }

    .nav-menu.active {
        left: 0;
    }
    
    .cart-link {
        justify-content: center;
        padding: 0.5rem;
    }
    
    .cart-counter {
        position: relative;
        top: auto;
        right: auto;
        margin-left: 0.5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .container {
        padding: 0 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-text {
        text-align: center;
    }
}

/* Анимации */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Загрузка */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-200);
    border-radius: 50%;
    border-top-color: var(--accent-cyan);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Уведомления */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    border-left: 4px solid;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.alert-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.25rem;
    margin-left: 1rem;
    opacity: 0.7;
    transition: var(--transition);
    color: inherit;
}

.alert-close:hover {
    opacity: 1;
    transform: scale(1.1);
}

.alert-success {
    background: #f0fdf4;
    border-color: #22c55e;
    color: #166534;
}

.alert-error {
    background: #fef2f2;
    border-color: #ef4444;
    color: #991b1b;
}

.alert-info {
    background: #eff6ff;
    border-color: var(--accent-cyan);
    color: var(--primary-blue);
}

/* ===== КОРЗИНА ===== */

/* Кнопка корзины в навигации */
.cart-link {
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: var(--radius-md);
}

.cart-link i {
    font-size: 1.1rem;
    transition: var(--transition);
}

.cart-link:hover {
    color: var(--primary-blue);
    background: var(--light-blue);
}

.cart-link:hover i {
    transform: scale(1.1);
}

.cart-text {
    white-space: nowrap;
}

.cart-counter {
    background: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    box-shadow: 0 2px 4px rgba(30, 58, 138, 0.2);
    border: 2px solid var(--white);
    z-index: 10;
}


/* Модальное окно корзины */
.cart-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.cart-modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.cart-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.cart-modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.cart-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.cart-modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.cart-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

/* Элементы корзины */
.cart-items {
    margin-bottom: 1.5rem;
}

.cart-empty {
    text-align: center;
    padding: 2rem;
    color: var(--gray-500);
    font-style: italic;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    background: var(--white);
    transition: var(--transition);
}

.cart-item:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-sm);
}

.cart-item-info h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.cart-item-price {
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 0.9rem;
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quantity-btn {
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-weight: 600;
    color: var(--gray-700);
    transition: var(--transition);
}

.quantity-btn:hover {
    background: var(--gray-200);
    border-color: var(--gray-400);
}

.quantity {
    min-width: 30px;
    text-align: center;
    font-weight: 600;
    color: var(--gray-900);
}

.remove-from-cart {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #dc2626;
    transition: var(--transition);
}

.remove-from-cart:hover {
    background: #fee2e2;
    border-color: #fca5a5;
}

/* Итоги корзины */
.cart-summary {
    border-top: 1px solid var(--gray-200);
    padding-top: 1.5rem;
}

.cart-total {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.total-amount {
    color: var(--primary-blue);
    font-size: 1.3rem;
}

.checkout-btn {
    width: 100%;
    justify-content: center;
}

/* Адаптивность корзины */
@media (max-width: 768px) {
    .cart-modal {
        padding: 0.5rem;
    }
    
    .cart-modal-content {
        max-height: 90vh;
    }
    
    .cart-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .cart-item-controls {
        width: 100%;
        justify-content: space-between;
    }
    
    .cart-modal-header,
    .cart-modal-body {
        padding: 1rem;
    }
}