/* School Management System - Main Stylesheet */

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #17a2b8;
    --light-bg: #f8f9fa;
    --dark-text: #2c3e50;
    --border-color: #dee2e6;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Login Page Styles */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.5s ease-out;
}

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

/* Sidebar Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 260px;
    background: var(--primary-color);
    color: white;
    overflow-y: auto;
    transition: all 0.3s;
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h4 {
    margin: 0;
    font-weight: 600;
    font-size: 1.2rem;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    padding-left: 25px;
}

.sidebar-menu a.active {
    background: var(--secondary-color);
    color: white;
}

.sidebar-menu a i {
    width: 25px;
    margin-right: 12px;
    font-size: 1.1rem;
}

/* Main Content Area */
.main-content {
    margin-left: 260px;
    padding: 20px;
    min-height: 100vh;
    background: var(--light-bg);
}

/* Header/Navbar */
.navbar-custom {
    background: white;
    padding: 15px 30px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-custom h3 {
    margin: 0;
    color: var(--dark-text);
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info span {
    color: var(--dark-text);
    font-weight: 500;
}

/* Cards */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.12);
}

.card-header {
    background: linear-gradient(135deg, var(--secondary-color), #5dade2);
    color: white;
    border-radius: 10px 10px 0 0 !important;
    padding: 15px 20px;
    font-weight: 600;
}

.card-body {
    padding: 25px;
}

/* Stats Cards */
.stats-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    border-left: 4px solid;
}

.stats-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
}

.stats-card.primary {
    border-left-color: var(--secondary-color);
}

.stats-card.success {
    border-left-color: var(--success-color);
}

.stats-card.warning {
    border-left-color: var(--warning-color);
}

.stats-card.danger {
    border-left-color: var(--danger-color);
}

.stats-card.info {
    border-left-color: var(--info-color);
}

.stats-card i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    opacity: 0.8;
}

.stats-card h3 {
    font-size: 2rem;
    font-weight: 700;
    margin: 10px 0;
}

.stats-card p {
    color: #6c757d;
    margin: 0;
    font-weight: 500;
}

/* Tables */
.table {
    background: white;
    border-radius: 10px;
    overflow: hidden;
}

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

.table thead th {
    border: none;
    padding: 15px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.table tbody td {
    padding: 15px;
    vertical-align: middle;
    border-top: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background: #f8f9fa;
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.3s;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-primary:hover {
    background: #2980b9;
}

/* Badges */
.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.85rem;
}

/* Forms */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    transition: all 0.3s;
}

.form-control:focus, .form-select:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 8px;
}

/* Status Badges */
.status-paid {
    background: #d4edda;
    color: #155724;
}

.status-pending {
    background: #fff3cd;
    color: #856404;
}

.status-overdue {
    background: #f8d7da;
    color: #721c24;
}

.status-present {
    background: #d4edda;
    color: #155724;
}

.status-absent {
    background: #f8d7da;
    color: #721c24;
}

.status-late {
    background: #fff3cd;
    color: #856404;
}

/* Alert Styles */
.alert {
    border-radius: 8px;
    border: none;
    padding: 15px 20px;
}

/* Notice Board */
.notice-item {
    background: white;
    border-left: 4px solid var(--secondary-color);
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.notice-item:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transform: translateX(5px);
}

.notice-item.high {
    border-left-color: var(--danger-color);
}

.notice-item.medium {
    border-left-color: var(--warning-color);
}

.notice-item.low {
    border-left-color: var(--info-color);
}

/* Exam Card */
.exam-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    border-top: 4px solid var(--secondary-color);
}

.exam-card h5 {
    color: var(--dark-text);
    margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        margin-left: -260px;
    }
    
    .sidebar.show {
        margin-left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-card {
        margin-bottom: 20px;
    }
}

/* Loading Spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Print Styles */
@media print {
    .sidebar, .navbar-custom, .btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}