/* ===== MAIN THEME STYLES ===== */

:root {
    /* Primary Colors */
    --primary-color: #667eea;
    --primary-dark: #5a6fd8;
    --primary-light: #8fa4f0;
    
    /* Secondary Colors */
    --secondary-color: #764ba2;
    --secondary-dark: #6a4190;
    --secondary-light: #8f5bb8;
    
    /* Accent Colors */
    --accent-color: #f093fb;
    --accent-dark: #e67ee0;
    --accent-light: #f4b0fc;
    
    /* Status Colors */
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    
    /* Neutral Colors */
    --light-color: #f8f9fa;
    --dark-color: #2c3e50;
    --gray-color: #6c757d;
    --white-color: #ffffff;
    
    /* Gradients */
    --primary-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --accent-gradient: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 25px rgba(0,0,0,0.15);
    
    /* Border Radius */
    --border-radius-sm: 5px;
    --border-radius-md: 10px;
    --border-radius-lg: 15px;
    --border-radius-xl: 20px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== GLOBAL STYLES ===== */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
}

/* ===== SIDEBAR STYLES ===== */

.sidebar {
    background: var(--dark-color);
    min-height: 100vh;
    color: var(--white-color);
    box-shadow: var(--shadow-md);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    transition: var(--transition-normal);
}

.sidebar .nav-link {
    color: #ecf0f1;
    padding: 12px 20px;
    border-radius: var(--border-radius-md);
    margin: 5px 0;
    transition: var(--transition-fast);
    text-decoration: none;
    display: flex;
    align-items: center;
    font-weight: 500;
}

.sidebar .nav-link:hover {
    background: #34495e;
    color: var(--white-color);
    transform: translateX(5px);
}

.sidebar .nav-link.active {
    background: var(--primary-color);
    color: var(--white-color);
    box-shadow: var(--shadow-sm);
}

.sidebar .nav-link i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}

/* ===== MAIN CONTENT STYLES ===== */

.main-content {
    background: var(--light-color);
    min-height: 100vh;
    padding: 20px;
    margin-left: 0;
    transition: var(--transition-normal);
}

@media (min-width: 768px) {
    .main-content {
        margin-left: 16.666667%;
    }
}

@media (min-width: 992px) {
    .main-content {
        margin-left: 16.666667%;
    }
}

/* ===== CARD STYLES ===== */

.card {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    overflow: hidden;
}

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

.card-header {
    background: var(--white-color);
    border-bottom: 1px solid #e9ecef;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
}

/* ===== STATISTICS CARDS ===== */

.stat-card {
    background: var(--primary-gradient);
    color: var(--white-color);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: var(--transition-slow);
}

.stat-card:hover::before {
    transform: translateX(100%);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card h3 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.stat-card p {
    margin: 0;
    opacity: 0.9;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== BUTTON STYLES ===== */

.btn {
    border-radius: var(--border-radius-md);
    font-weight: 500;
    transition: var(--transition-fast);
    border: none;
    padding: 0.5rem 1rem;
}

.btn-primary {
    background: var(--primary-gradient);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
}

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

.btn-warning:hover {
    background: #e0a800;
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-2px);
}

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

.btn-info:hover {
    background: #138496;
    transform: translateY(-2px);
}

/* ===== FORM STYLES ===== */

.form-control {
    border-radius: var(--border-radius-md);
    border: 2px solid #e9ecef;
    transition: var(--transition-fast);
    padding: 0.75rem 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-select {
    border-radius: var(--border-radius-md);
    border: 2px solid #e9ecef;
    transition: var(--transition-fast);
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* ===== TABLE STYLES ===== */

.table {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead th {
    background: var(--light-color);
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: var(--dark-color);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0,0,0,.02);
}

/* ===== BADGE STYLES ===== */

.badge {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    padding: 0.5em 0.75em;
}

/* ===== MODAL STYLES ===== */

.modal-content {
    border-radius: var(--border-radius-lg);
    border: none;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    background: var(--light-color);
    border-bottom: 1px solid #e9ecef;
}

.modal-footer {
    background: var(--light-color);
    border-top: 1px solid #e9ecef;
}

/* ===== ALERT STYLES ===== */

.alert {
    border-radius: var(--border-radius-md);
    border: none;
    box-shadow: var(--shadow-sm);
}

.alert-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
    color: #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    color: #856404;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    color: #0c5460;
}

/* ===== UTILITY CLASSES ===== */

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.bg-gradient-accent {
    background: var(--accent-gradient);
}

.shadow-custom {
    box-shadow: var(--shadow-md);
}

.rounded-custom {
    border-radius: var(--border-radius-lg);
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 767.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stat-card h3 {
        font-size: 2rem;
    }
}

/* ===== ANIMATIONS ===== */

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

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

/* ===== LOADING STATES ===== */

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}