/**
 * Speakerplan Venue - Stylesheet
 * Modern, accessible, responsive design with dark mode support
 */

/* ============================================
   CSS Custom Properties (Light Theme)
   ============================================ */
:root {
    /* Colors */
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --info-color: #17a2b8;
    
    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #ecf0f1;
    
    /* Text */
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-muted: #95a5a6;
    
    /* Grays */
    --light-gray: #ecf0f1;
    --medium-gray: #bdc3c7;
    --dark-gray: #7f8c8d;
    --white: #ffffff;
    --black: #000000;
    
    /* Borders */
    --border-color: #dee2e6;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-sm: 4px;
    
    /* Shadows */
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-fast: all 0.15s ease;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* Navbar */
    --navbar-height: 70px;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-navbar: 1100;
    --z-modal: 1200;
    --z-toast: 1300;
}

/* ============================================
   Dark Theme
   ============================================ */
[data-theme="dark"] {
    --primary-color: #ecf0f1;
    --secondary-color: #5dade2;
    --accent-color: #e74c3c;
    
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    
    --text-primary: #ecf0f1;
    --text-secondary: #bdc3c7;
    --text-muted: #7f8c8d;
    
    --light-gray: #2d3436;
    --medium-gray: #636e72;
    --dark-gray: #b2bec3;
    --white: #1a1a2e;
    
    --border-color: #2d3436;
    
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    
    --navbar-bg: rgba(26, 26, 46, 0.95);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility: Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--secondary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-toast);
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-navbar);
    transition: var(--transition);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.navbar-logo {
    color: var(--secondary-color);
}

.navbar-brand-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="dark"] .navbar-brand-text {
    background: linear-gradient(135deg, var(--text-primary), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
}

.navbar-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: calc(var(--z-navbar) + 1);
}

.navbar-toggle-icon {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: var(--transition);
}

.navbar-toggle-icon::before,
.navbar-toggle-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--text-primary);
    transition: var(--transition);
}

.navbar-toggle-icon::before { top: -7px; }
.navbar-toggle-icon::after { top: 7px; }

.navbar-toggle[aria-expanded="true"] .navbar-toggle-icon {
    background: transparent;
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-icon::before {
    transform: rotate(45deg);
    top: 0;
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-icon::after {
    transform: rotate(-45deg);
    top: 0;
}

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

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: var(--transition-fast);
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
    background: rgba(52, 152, 219, 0.1);
}

.nav-link.active {
    font-weight: 600;
}

.nav-btn {
    margin-left: var(--spacing-sm);
}

/* User Avatar */
.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.user-name {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.dropdown-toggle::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: var(--spacing-xs);
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    transition: var(--transition-fast);
}

.dropdown-toggle[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 180px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xs) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-fast);
    list-style: none;
    z-index: var(--z-dropdown);
}

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

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--bg-secondary);
}

.dropdown-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: var(--spacing-xs) 0;
}

.text-danger {
    color: var(--accent-color) !important;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    margin-left: var(--spacing-md);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.theme-toggle.rotating {
    animation: rotate 0.3s ease;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.theme-icon {
    color: var(--text-primary);
}

.theme-icon.moon { display: none; }
[data-theme="dark"] .theme-icon.sun { display: none; }
[data-theme="dark"] .theme-icon.moon { display: block; }

/* ============================================
   Main Content
   ============================================ */
.main-content {
    padding-top: calc(var(--navbar-height) + var(--spacing-lg));
    min-height: calc(100vh - var(--navbar-height));
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ============================================
   Title & Headers
   ============================================ */
.title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
    color: var(--text-primary);
}

.title h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.title p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

/* ============================================
   Breadcrumbs
   ============================================ */
.breadcrumbs {
    margin-bottom: var(--spacing-lg);
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
    padding: 0;
    margin: 0;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: var(--spacing-sm);
    color: var(--text-muted);
}

.breadcrumb-item a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   Links
   ============================================ */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    color: var(--secondary-color);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.back-link:hover {
    color: var(--accent-color);
}

/* ============================================
   Countries & Regions Grid
   ============================================ */
.countries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.country-box {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    box-shadow: var(--shadow);
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-primary);
}

.country-box:hover {
    border-color: var(--secondary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.country-box:focus-visible {
    border-color: var(--secondary-color);
}

.country-box.selected {
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
    color: white;
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

.regions-section {
    max-width: 900px;
    margin: 0 auto;
}

.regions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.region-item {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--secondary-color);
    cursor: pointer;
}

.region-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow);
}

/* ============================================
   Form Cards
   ============================================ */
.form-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    margin-top: var(--spacing-lg);
}

.form-card h2 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.form-group input.is-invalid,
.form-group select.is-invalid {
    border-color: var(--accent-color);
}

.form-group input.is-valid,
.form-group select.is-valid {
    border-color: var(--success-color);
}

.form-group .error-message {
    display: block;
    color: var(--accent-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    box-shadow: var(--shadow);
}

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

.btn-danger:hover {
    background: #c0392b;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.4);
}

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

.btn-success:hover {
    background: #219a52;
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.4);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: var(--font-size-lg);
}

/* ============================================
   Messages & Alerts
   ============================================ */
.message {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-weight: 500;
}

.success {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.info {
    background: rgba(23, 162, 184, 0.1);
    color: var(--info-color);
    border: 1px solid var(--info-color);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    top: calc(var(--navbar-height) + var(--spacing-md));
    right: var(--spacing-md);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
    pointer-events: none;
}

.toast {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    transform: translateX(120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: auto;
    border-left: 4px solid var(--info-color);
}

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

.toast.hiding {
    transform: translateX(120%);
    opacity: 0;
}

.toast-success { border-left-color: var(--success-color); }
.toast-error { border-left-color: var(--accent-color); }
.toast-warning { border-left-color: var(--warning-color); }
.toast-info { border-left-color: var(--info-color); }

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toast-icon {
    flex-shrink: 0;
}

.toast-success .toast-icon { color: var(--success-color); }
.toast-error .toast-icon { color: var(--accent-color); }
.toast-warning .toast-icon { color: var(--warning-color); }
.toast-info .toast-icon { color: var(--info-color); }

.toast-message {
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: var(--transition-fast);
}

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

/* ============================================
   Calendar
   ============================================ */
.calendar {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
}

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

.calendar-title {
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.calendar-nav {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--text-primary);
}

.calendar-nav:hover {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--spacing-xs);
}

.calendar-day-header {
    text-align: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    padding: var(--spacing-sm);
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 500;
    color: var(--text-primary);
}

.calendar-day:not(.empty):not(.disabled):not(.booked):hover {
    background: var(--bg-secondary);
}

.calendar-day.empty {
    cursor: default;
}

.calendar-day.disabled {
    color: var(--text-muted);
    cursor: not-allowed;
}

.calendar-day.booked {
    background: rgba(231, 76, 60, 0.1);
    color: var(--accent-color);
    cursor: not-allowed;
    text-decoration: line-through;
}

.calendar-day.today {
    border: 2px solid var(--secondary-color);
}

.calendar-day.selected {
    background: var(--secondary-color);
    color: white;
}

.calendar-day.in-range {
    background: rgba(52, 152, 219, 0.2);
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xl);
}

.pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.pagination-btn:hover:not(.active) {
    background: var(--bg-secondary);
    border-color: var(--secondary-color);
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xxl);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-subtitle {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-3px);
}

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

/* ============================================
   Image Lazy Loading
   ============================================ */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img.loaded {
    opacity: 1;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .navbar-toggle {
        display: block;
    }
    
    .navbar-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--bg-primary);
        flex-direction: column;
        align-items: stretch;
        padding: calc(var(--navbar-height) + var(--spacing-lg)) var(--spacing-lg) var(--spacing-lg);
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .navbar-menu.show {
        right: 0;
    }
    
    .navbar-nav {
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-link {
        padding: var(--spacing-md);
        border-radius: var(--border-radius);
    }
    
    .nav-btn {
        margin: var(--spacing-md) 0 0;
        text-align: center;
    }
    
    .theme-toggle {
        margin: var(--spacing-md) 0 0;
        align-self: center;
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background: var(--bg-secondary);
        margin-top: var(--spacing-sm);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
    }
    
    .container {
        padding: var(--spacing-md);
    }
    
    .countries-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: var(--spacing-md);
    }

    .country-box {
        height: 80px;
        font-size: var(--font-size-sm);
    }

    .title h1 {
        font-size: var(--font-size-3xl);
    }
    
    .form-card {
        padding: var(--spacing-lg);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }

    .countries-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: var(--spacing-sm);
    }

    .country-box {
        height: 70px;
        font-size: var(--font-size-xs);
        padding: var(--spacing-sm);
    }

    .regions-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        width: 100%;
    }
    
    .form-card {
        padding: var(--spacing-md);
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .navbar,
    .footer,
    .toast-container,
    .theme-toggle {
        display: none !important;
    }
    
    .main-content {
        padding-top: 0;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Equipment Grid & Cards - Modern Listing Style
   ============================================ */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.equipment-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

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

.equipment-card .equipment-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    background: var(--bg-tertiary);
    transition: transform 0.3s ease;
}

.equipment-card .equipment-image-placeholder {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.equipment-card .equipment-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background: var(--secondary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.equipment-card .favorite-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
}

.equipment-card .favorite-btn:hover {
    background: white;
    transform: scale(1.1);
}

.equipment-card .favorite-btn.active {
    color: var(--accent-color);
}

.equipment-card .equipment-info {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.equipment-card .equipment-info h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    line-height: 1.3;
}

.equipment-card .equipment-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.equipment-card .equipment-meta span {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: 2px 8px;
    border-radius: 4px;
}

.equipment-card .equipment-location {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.equipment-card .equipment-location::before {
    content: "📍";
    font-size: 12px;
}

.equipment-card .equipment-owner {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.equipment-card .equipment-price {
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.equipment-card .price-amount {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--secondary-color);
}

.equipment-card .price-period {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 400;
}

.equipment-card .equipment-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.equipment-card .equipment-actions .btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Equipment Grid Responsive */
@media (max-width: 1400px) {
    .equipment-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1024px) {
    .equipment-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .equipment-card-image {
        height: 200px;
    }
}

@media (max-width: 640px) {
    .equipment-grid {
        grid-template-columns: 1fr;
    }
    
    .equipment-card-image {
        height: 220px;
    }
}

/* Equipment Card Image Container */
.equipment-card-image {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.equipment-card-image .equipment-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.3s ease;
}

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

.equipment-card-image .equipment-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--secondary-color);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.equipment-card-image .favorite-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    width: 42px;
    height: 42px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    color: var(--text-secondary);
    z-index: 2;
    font-size: 18px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.equipment-card-image .favorite-btn:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.equipment-card-image .favorite-btn.active {
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
}

.favorite-icon {
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
}

.favorite-text {
    white-space: nowrap;
    font-size: 12px;
    font-weight: 500;
}

.equipment-status {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    z-index: 2;
}

.equipment-status.status-active {
    background: var(--success-color);
    color: white;
}

.equipment-status.status-inactive {
    background: var(--text-muted);
    color: white;
}

.equipment-card.equipment-inactive {
    opacity: 0.7;
}

.equipment-card.equipment-inactive .equipment-card-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
}

/* Equipment Info Styles */
.equipment-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}

.equipment-location,
.equipment-owner {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.location-icon,
.owner-icon {
    font-size: 14px;
}

.equipment-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    line-height: 1.4;
}

.equipment-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.price-amount {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.price-period {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.equipment-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.equipment-actions .btn {
    flex: 1;
    min-width: 0;
    padding: 8px 12px;
    font-size: 0.8rem;
    text-align: center;
}

.btn-block {
    width: 100%;
}

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

.btn-danger:hover {
    background: #c0392b;
}

/* Dashboard Stats Cards */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.dashboard-stat-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.dashboard-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.stat-icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon-wrapper svg {
    stroke-width: 2;
}

.stat-icon-primary {
    background: rgba(52, 152, 219, 0.15);
    color: var(--secondary-color);
}

.stat-icon-warning {
    background: rgba(243, 156, 18, 0.15);
    color: var(--warning-color);
}

.stat-icon-success {
    background: rgba(46, 204, 113, 0.15);
    color: var(--success-color);
}

.stat-icon-danger {
    background: rgba(231, 76, 60, 0.15);
    color: #e74c3c;
}

.stat-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dashboard-stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.dashboard-stat-card .stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* Quick Actions Grid */
.quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.quick-actions .btn {
    flex: 1;
    min-width: 150px;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.info-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.info-value {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 600;
}