/**
 * HDMMO.COM - Main Stylesheet
 * Dark Premium Theme với màu xanh cyan neon
 */

/* =====================================================
   1. CSS VARIABLES & RESET
   ===================================================== */
:root {
    /* Colors */
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-input: #1a1a2e;
    --bg-hover: #1f1f3a;
    
    --accent-primary: #00d4ff;
    --accent-secondary: #7b2cbf;
    --accent-success: #00ff88;
    --accent-warning: #ffd93d;
    --accent-danger: #ff4757;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #6b6b8d;
    
    --border-color: #2d2d44;
    --border-hover: #3d3d5c;
    
    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow-success: 0 0 20px rgba(0, 255, 136, 0.3);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 400ms ease-out;
    
    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-toast: 600;
    
    /* Layout */
    --header-height: 70px;
    --sidebar-width: 300px;
    --container-max: 1200px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--text-primary);
}

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

ul, ol {
    list-style: none;
}

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

/* =====================================================
   2. UTILITY CLASSES
   ===================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent-primary); }
.text-success { color: var(--accent-success); }
.text-danger { color: var(--accent-danger); }
.text-warning { color: var(--accent-warning); }

.font-mono { font-family: 'JetBrains Mono', monospace; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* =====================================================
   3. TYPOGRAPHY
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* =====================================================
   4. BUTTONS
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: #00b8e6;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--accent-secondary);
    color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
    background: #6a2599;
    transform: translateY(-2px);
}

.btn-success {
    background: var(--accent-success);
    color: var(--bg-primary);
}

.btn-success:hover:not(:disabled) {
    background: #00dd77;
    box-shadow: var(--shadow-glow-success);
}

.btn-danger {
    background: var(--accent-danger);
    color: var(--text-primary);
}

.btn-danger:hover:not(:disabled) {
    background: #e63946;
}

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

.btn-outline:hover:not(:disabled) {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-label .required {
    color: var(--accent-danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input.error,
.form-textarea.error {
    border-color: var(--accent-danger);
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--accent-danger);
}

.form-hint {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23a0a0a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    padding-right: 44px;
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-check input {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-primary);
}

/* Quantity Input */
.quantity-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.quantity-input button {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.quantity-input button:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.quantity-input input {
    width: 80px;
    height: 40px;
    text-align: center;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
}

.quantity-input input::-webkit-inner-spin-button,
.quantity-input input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* =====================================================
   6. HEADER
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-fixed);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 700;
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.logo:hover {
    color: var(--text-primary);
}

/* Desktop Navigation */
.nav-desktop {
    display: none;
    gap: var(--spacing-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.1);
}

.nav-icon {
    font-size: 1.125rem;
}

/* User Menu Desktop */
.user-menu-desktop {
    display: none;
    align-items: center;
    gap: var(--spacing-md);
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.user-info .user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-info .user-balance {
    font-size: 0.875rem;
    color: var(--accent-primary);
    font-weight: 500;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    padding: var(--spacing-sm);
}

.hamburger {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    bottom: -7px;
}

.menu-toggle.active .hamburger {
    background: transparent;
}

.menu-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.menu-toggle.active .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* =====================================================
   7. SIDEBAR
   ===================================================== */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-modal-backdrop);
}

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

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    max-width: 85%;
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-modal);
    overflow-y: auto;
}

.sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.user-avatar.guest {
    background: var(--bg-card);
    color: var(--text-muted);
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-details .user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-details .user-balance {
    font-size: 0.875rem;
    color: var(--accent-primary);
}

.user-details .link {
    font-size: 0.875rem;
    color: var(--accent-primary);
}

.sidebar-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.sidebar-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-nav {
    padding: var(--spacing-md);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 14px var(--spacing-md);
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.sidebar-link:hover,
.sidebar-link.active {
    background: var(--bg-hover);
    color: var(--accent-primary);
}

.sidebar-link.logout {
    color: var(--accent-danger);
}

.sidebar-link.logout:hover {
    background: rgba(255, 71, 87, 0.1);
}

.sidebar-icon {
    font-size: 1.25rem;
}

.sidebar-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-md) 0;
}

/* =====================================================
   8. MAIN CONTENT
   ===================================================== */
.main-content {
    min-height: calc(100vh - var(--header-height));
    padding-top: calc(var(--header-height) + var(--spacing-lg));
    padding-bottom: var(--spacing-2xl);
}

/* =====================================================
   9. STATS WIDGET
   ===================================================== */
.stats-section {
    margin-bottom: var(--spacing-xl);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

/* =====================================================
   10. CATEGORIES
   ===================================================== */
.categories-section {
    margin-bottom: var(--spacing-xl);
}

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

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.category-card:hover,
.category-card.active {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.category-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-lg);
    object-fit: cover;
    background: var(--bg-secondary);
}

.category-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.category-count {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* =====================================================
   11. PRODUCTS
   ===================================================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.product-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.product-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--bg-secondary);
}

.product-info {
    padding: var(--spacing-lg);
}

.product-category {
    font-size: 0.75rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.product-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-stock {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.product-stock .in-stock {
    color: var(--accent-success);
}

.product-stock .out-of-stock {
    color: var(--accent-danger);
}

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

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.product-btn {
    padding: 10px 20px;
}

/* =====================================================
   12. PRODUCT DETAIL PAGE
   ===================================================== */
.product-detail {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.product-detail-image {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.product-detail-image img {
    width: 100%;
    height: auto;
}

.product-detail-info {
    padding: var(--spacing-lg);
}

.product-detail-info .product-category {
    margin-bottom: var(--spacing-sm);
}

.product-detail-info h1 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
}

.product-detail-info .product-price {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
}

.product-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.product-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.meta-item .icon {
    font-size: 1.125rem;
}

.product-purchase {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.purchase-form {
    margin-top: var(--spacing-lg);
}

.purchase-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.purchase-summary .label {
    color: var(--text-secondary);
}

.purchase-summary .value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary);
}

/* Warranty & Notes */
.product-warranty {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.3);
    border-radius: var(--radius-md);
}

.product-warranty h4 {
    color: var(--accent-success);
    margin-bottom: var(--spacing-sm);
}

.product-notes {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 217, 61, 0.1);
    border: 1px solid rgba(255, 217, 61, 0.3);
    border-radius: var(--radius-md);
}

.product-notes h4 {
    color: var(--accent-warning);
    margin-bottom: var(--spacing-sm);
}

/* =====================================================
   13. AUTH PAGES (Login/Register)
   ===================================================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--bg-primary);
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-xl);
    object-fit: cover;
}

.auth-header h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.auth-header p {
    color: var(--text-secondary);
    margin: 0;
}

.auth-form .btn {
    margin-top: var(--spacing-lg);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* =====================================================
   14. DEPOSIT PAGE
   ===================================================== */
.deposit-page {
    max-width: 800px;
    margin: 0 auto;
}

.bank-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.bank-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.bank-card:hover {
    border-color: var(--accent-primary);
}

.bank-card.active {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.bank-card .bank-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.bank-card .bank-info {
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.bank-card .bank-info p {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    margin: 0;
}

.bank-card .bank-info .label {
    color: var(--text-muted);
}

.bank-card .bank-info .value {
    font-weight: 500;
    color: var(--text-primary);
}

.bank-qr {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    background: var(--text-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    font-size: 0.875rem;
}

.deposit-form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.deposit-notice {
    background: rgba(255, 217, 61, 0.1);
    border: 1px solid rgba(255, 217, 61, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.deposit-notice h4 {
    color: var(--accent-warning);
    margin-bottom: var(--spacing-sm);
}

.deposit-notice ul {
    padding-left: var(--spacing-lg);
    list-style: disc;
}

.deposit-notice li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

/* =====================================================
   15. ADMIN PANEL
   ===================================================== */
.admin-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-xl);
    min-height: calc(100vh - var(--header-height) - 100px);
}

.admin-sidebar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    height: fit-content;
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
}

.admin-sidebar-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.admin-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px var(--spacing-md);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

.admin-nav-item:hover,
.admin-nav-item.active {
    background: var(--bg-hover);
    color: var(--accent-primary);
}

.admin-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.admin-content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.admin-stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.admin-stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.admin-stat-card .label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-secondary);
}

.data-table tbody tr:hover {
    background: var(--bg-hover);
}

.data-table .actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Admin Forms */
.admin-form-section {
    margin-bottom: var(--spacing-2xl);
}

.admin-form-section h3 {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

/* Account Preview Box */
.account-preview {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 300px;
    overflow-y: auto;
}

.account-preview::-webkit-scrollbar {
    width: 8px;
}

.account-preview::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.account-preview::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

/* Stock Input */
.stock-input-area {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.stock-input-area textarea {
    width: 100%;
    min-height: 200px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    resize: vertical;
}

.stock-input-area textarea:focus {
    outline: none;
}

.stock-counter {
    display: flex;
    justify-content: space-between;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.stock-counter .count {
    color: var(--accent-primary);
    font-weight: 600;
}

/* =====================================================
   16. MODALS & POPUPS
   ===================================================== */
.popup-overlay,
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.popup-overlay.active,
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 100%;
    text-align: center;
    transform: translateY(20px);
    transition: transform var(--transition-slow);
}

.popup-overlay.active .popup-content {
    transform: translateY(0);
}

.popup-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.popup-content h3 {
    margin-bottom: var(--spacing-md);
}

.popup-content p {
    margin-bottom: var(--spacing-lg);
}

.popup-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.popup-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Purchase Success Modal */
.modal-accounts {
    text-align: left;
}

.modal-accounts-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.modal-accounts-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.accounts-list {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    max-height: 300px;
    overflow-y: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    white-space: pre-wrap;
    word-break: break-all;
    margin-bottom: var(--spacing-lg);
}

.accounts-list::-webkit-scrollbar {
    width: 8px;
}

.accounts-list::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.accounts-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
}

.modal-actions .btn {
    flex: 1;
}

/* =====================================================
   17. ALERTS & NOTIFICATIONS
   ===================================================== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.alert-success {
    background: rgba(0, 255, 136, 0.15);
    border: 1px solid rgba(0, 255, 136, 0.3);
    color: var(--accent-success);
}

.alert-error {
    background: rgba(255, 71, 87, 0.15);
    border: 1px solid rgba(255, 71, 87, 0.3);
    color: var(--accent-danger);
}

.alert-warning {
    background: rgba(255, 217, 61, 0.15);
    border: 1px solid rgba(255, 217, 61, 0.3);
    color: var(--accent-warning);
}

.alert-info {
    background: rgba(0, 212, 255, 0.15);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--accent-primary);
}

.alert-close {
    font-size: 1.25rem;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    min-width: 280px;
    max-width: 400px;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--accent-success);
}

.toast.error {
    border-left: 4px solid var(--accent-danger);
}

.toast.warning {
    border-left: 4px solid var(--accent-warning);
}

.toast.info {
    border-left: 4px solid var(--accent-primary);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* =====================================================
   18. LOADING STATES
   ===================================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 15, 26, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-hover) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-state .icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

/* =====================================================
   19. FOOTER
   ===================================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer-col p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.1);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.footer-bottom strong {
    color: var(--accent-primary);
}

/* =====================================================
   20. RESPONSIVE DESIGN
   ===================================================== */

/* Tablet */
@media (min-width: 768px) {
    .nav-desktop {
        display: flex;
    }
    
    .user-menu-desktop {
        display: flex;
    }
    
    .menu-toggle {
        display: none;
    }
    
    .product-detail {
        grid-template-columns: 1fr 1fr;
    }
    
    .admin-layout {
        grid-template-columns: 260px 1fr;
    }
    
    .admin-sidebar {
        display: block;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Mobile Only */
@media (max-width: 767px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }
    
    .admin-sidebar {
        display: none;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-detail {
        gap: var(--spacing-lg);
    }
    
    .modal-accounts-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .toast {
        min-width: auto;
        max-width: none;
    }
}

/* Print Styles */
@media print {
    .header,
    .sidebar,
    .footer,
    .btn,
    .modal-overlay {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .main-content {
        padding-top: 0;
    }
}