/* Modern Gradient Theme */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #3f93ff 0%, #3f93ff 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --danger-gradient: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
    --info-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    --primary: #667eea;
    --secondary: #f093fb;
    --success: #38ef7d;
    --warning: #fee140;
    --danger: #f45c43;
    --info: #00f2fe;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
}

html[data-theme="dark"],
html.dark-mode {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --text-primary: #eaeaea;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
}

body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navbar */
.navbar {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 0;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.navbar-menu {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

.navbar-menu a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
    font-weight: 500;
}

.navbar-menu a:hover,
.navbar-menu a.active {
    opacity: 0.8;
    border-bottom: 2px solid white;
    padding-bottom: 0.25rem;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.theme-toggle-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.2rem;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.menu-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

h1 {
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-size: 2.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
}

/* Cards */
.card {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.card-title {
    margin: 0 0 1.5rem 0;
    color: var(--text-primary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    padding: 1rem;
    border-radius: 8px;
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.stat-card.success {
    background: var(--success-gradient);
}

.stat-card.warning {
    background: var(--warning-gradient);
}

.stat-card.danger {
    background: var(--danger-gradient);
}

.stat-card {
    background: var(--primary-gradient);
}

.stat-label {
    font-size: 0.8rem;
    opacity: 0.9;
    margin-bottom: 0.3rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: 8px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.table thead {
    background: var(--secondary-gradient);
    color: white;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background: var(--bg-secondary);
    transition: background-color 0.3s;
}

.table-striped tbody tr:nth-child(odd) {
    background: rgba(102, 126, 234, 0.05);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(240, 147, 251, 0.4);
}

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

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 239, 125, 0.4);
}

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

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 92, 67, 0.4);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge.success {
    background: rgba(56, 239, 125, 0.2);
    color: #11998e;
}

.badge.danger {
    background: rgba(245, 92, 67, 0.2);
    color: #eb3349;
}

.badge.warning {
    background: rgba(254, 225, 64, 0.2);
    color: #fa709a;
}

.badge.info {
    background: rgba(0, 242, 254, 0.2);
    color: #4facfe;
}

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: slideIn 0.3s ease;
    z-index: 2000;
}

.toast.success {
    background: var(--success-gradient);
}

.toast.error {
    background: var(--danger-gradient);
}

.toast.warning {
    background: var(--warning-gradient);
}

.toast.info {
    background: var(--info-gradient);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Mobile Action Bar */
.mobile-action-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 0.5rem;
    gap: 0.5rem;
    z-index: 999;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

body.with-action-bar {
    padding-bottom: 60px;
}

body.with-action-bar .mobile-action-bar {
    display: flex;
}

/* Text utilities */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-secondary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .navbar-menu {
        display: none;
        flex-direction: column;
        gap: 1rem;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-gradient);
        padding: 1rem;
        width: 100%;
    }

    .navbar-menu.active {
        display: flex;
    }

    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.50rem;
        margin-bottom: 1rem;
    }

    .stat-card {
        padding: 0.75rem;
    }

    .stat-label {
        font-size: 0.9rem;
        margin-bottom: 0.2rem;
    }

    .stat-value {
        font-size: 1.2rem;
    }

    .table {
        font-size: 0.9rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
    }

    .navbar-container {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .navbar-brand {
        font-size: 1.2rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 1rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
}
/* Theme Preview Buttons */
.theme-preview-btn {
    padding: 0.75rem 1rem;
    border: 2px solid var(--primary);
    background: transparent;
    color: var(--primary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.theme-preview-btn:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

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