/**
 * GreenTech E-Commerce - Main Styles
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Colors */
    --color-primary: #10B981;
    --color-primary-dark: #059669;
    --color-primary-light: #D1FAE5;
    --color-secondary: #2DD4BF;
    --color-secondary-light: #CCFBF1;
    
    /* Grays */
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Status Colors */
    --color-danger: #EF4444;
    --color-danger-light: #FEE2E2;
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-success: #10B981;
    --color-success-light: #D1FAE5;
    --color-info: #3B82F6;
    --color-info-light: #DBEAFE;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Container */
    --container-max: 1400px;
    --container-padding: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

ul, ol {
    list-style: none;
}

/* ============================================
   UTILITIES
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   ANNOUNCEMENT BAR
   ============================================ */
.announcement-bar {
    padding: var(--space-2) 0;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
}

.announcement-bar p {
    margin: 0;
}

/* ============================================
   HEADER
   ============================================ */
.main-header {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: transform var(--transition-normal);
}

.main-header.hidden {
    transform: translateY(-100%);
}

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: var(--space-6);
}

.logo {
    flex-shrink: 0;
}

.logo img {
    height: 110px !important;
    width: auto;
}

/* Search Box */
.search-box {
    flex: 1;
    max-width: 500px;
}

.search-box form {
    display: flex;
    position: relative;
}

.search-box input {
    width: 100%;
    height: 44px;
    padding: 0 var(--space-12) 0 var(--space-4);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    background: var(--color-gray-100);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: white;
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.search-box button {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.search-box button:hover {
    background: var(--color-primary-dark);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.header-link,
.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-700);
    transition: all var(--transition-fast);
}

.header-link:hover,
.dropdown-toggle:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.header-link i,
.dropdown-toggle i {
    font-size: 18px;
}

.header-link.icon-only {
    position: relative;
    padding: var(--space-2);
    width: 40px;
    height: 40px;
    justify-content: center;
}

/* Badge */
.badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: var(--color-danger);
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 220px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    z-index: 100;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-gray-700);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.dropdown-item i {
    width: 20px;
    text-align: center;
}

.dropdown-divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: var(--space-2) 0;
}

/* Submenu */
.dropdown-item.has-submenu {
    position: relative;
}

.dropdown-item.has-submenu > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.submenu {
    position: absolute;
    top: 0;
    left: 100%;
    min-width: 200px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-10px);
    transition: all var(--transition-fast);
}

.dropdown-item.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.submenu a {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-gray-700);
}

.submenu a:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--color-gray-700);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    background: white;
    z-index: 1100;
    transition: left var(--transition-normal);
    overflow-y: auto;
}

.mobile-menu.active {
    left: 0;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-menu-header .logo img {
    height: 110px !important;
}

.mobile-menu-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--color-gray-600);
}

.mobile-menu-body {
    padding: var(--space-4);
}

.mobile-search {
    margin-bottom: var(--space-6);
}

.mobile-search form {
    display: flex;
    position: relative;
}

.mobile-search input {
    width: 100%;
    height: 44px;
    padding: 0 var(--space-12) 0 var(--space-4);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: var(--color-gray-100);
}

.mobile-search button {
    position: absolute;
    right: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: white;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mobile-nav a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-gray-700);
}

.mobile-nav a:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.mobile-nav a i {
    width: 24px;
    text-align: center;
    color: var(--color-primary);
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   FLASH MESSAGES
   ============================================ */
.flash-messages {
    margin-top: var(--space-4);
}

.alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.alert-success {
    background: var(--color-success-light);
    color: var(--color-primary-dark);
    border: 1px solid var(--color-primary);
}

.alert-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

.alert-info {
    background: var(--color-info-light);
    color: var(--color-info);
    border: 1px solid var(--color-info);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 600;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.btn-secondary:hover {
    background: var(--color-gray-200);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    background: #DC2626;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 16px;
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-700);
}

.form-label.required::after {
    content: ' *';
    color: var(--color-danger);
}

.form-control {
    width: 100%;
    height: 48px;
    padding: 0 var(--space-4);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-size: 15px;
    transition: all var(--transition-fast);
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

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

textarea.form-control {
    height: auto;
    padding: var(--space-3) var(--space-4);
    resize: vertical;
    min-height: 120px;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236B7280' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-text {
    font-size: 13px;
    color: var(--color-gray-500);
    margin-top: var(--space-1);
}

.form-error {
    font-size: 13px;
    color: var(--color-danger);
    margin-top: var(--space-1);
}

.input-group {
    display: flex;
}

.input-group .form-control {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group .btn {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--color-gray-100);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-body {
    padding: var(--space-4);
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-text {
    font-size: 14px;
    color: var(--color-gray-600);
}

/* ============================================
   BADGES & LABELS
   ============================================ */
.badge-label {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-new {
    background: var(--color-success);
    color: white;
}

.badge-discount {
    background: var(--color-danger);
    color: white;
}

.badge-outlet {
    background: var(--color-warning);
    color: white;
}

.badge-excellent {
    background: var(--color-success-light);
    color: var(--color-primary-dark);
}

.badge-very-good {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

/* ============================================
   PRICE
   ============================================ */
.price {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.price-current {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-gray-900);
}

.price-old {
    font-size: 14px;
    color: var(--color-gray-400);
    text-decoration: line-through;
}

.price-discount {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-danger);
    background: var(--color-danger-light);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.installment {
    font-size: 12px;
    color: var(--color-primary);
    margin-top: var(--space-1);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: var(--space-16) 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-gray-900);
}

.section-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
}

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

/* ============================================
   GRID
   ============================================ */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-6 {
    grid-template-columns: repeat(6, 1fr);
}

/* ============================================
   FOOTER
   ============================================ */
.main-footer {
    background: var(--color-gray-900);
    color: white;
    padding-top: var(--space-16);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
    padding-bottom: var(--space-10);
}

.footer-logo img {
    height: 110px !important;
    margin-bottom: var(--space-4);
}

.footer-desc {
    font-size: 14px;
    color: var(--color-gray-400);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-gray-800);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-400);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-4px);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--space-5);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-col ul li a {
    font-size: 14px;
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
    color: var(--color-primary);
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: 14px;
    color: var(--color-gray-400);
}

.contact-info i {
    color: var(--color-primary);
    margin-top: 2px;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6) 0;
    border-top: 1px solid var(--color-gray-800);
}

.footer-bottom p {
    font-size: 14px;
    color: var(--color-gray-500);
}

.payment-methods {
    display: flex;
    gap: var(--space-4);
    font-size: 24px;
    color: var(--color-gray-500);
}

/* ============================================
   TOAST
   ============================================ */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--color-gray-900);
    color: white;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast i {
    color: var(--color-success);
    font-size: 20px;
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-10);
}

.pagination a,
.pagination span {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-3);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination a {
    background: white;
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-200);
}

.pagination a:hover {
    background: var(--color-gray-100);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination .active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.pagination .disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
}

.empty-state i {
    font-size: 64px;
    color: var(--color-gray-300);
    margin-bottom: var(--space-6);
}

.empty-state h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
}

.empty-state p {
    font-size: 14px;
    color: var(--color-gray-500);
    margin-bottom: var(--space-6);
}