:root {
    --primary-color: #1a4b8c;
    --secondary-color: #2e7d32;
    --accent-color: #ff9800;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --card-color-1: #2196F3;
    --card-color-2: #FF5722;
    --card-color-3: #4CAF50;
    --card-color-4: #9C27B0;
    --header-height: 70px;
    --transition: all 0.3s ease;
    --card-radius: 50%;
    --shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
    max-width: 100%;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Login Page Styles */
#login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), #0d2b4f);
}

.login-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
    padding: 40px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    /* background-color: var(--primary-color); */
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-logo img {
    width: 150px;
    height: auto;
    margin-bottom: 10px;
}

.login-header h1 {
    margin-top: 40px;
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-header p {
    color: #666;
    font-size: 1rem;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.login-form input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.login-form input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(26, 75, 140, 0.2);
}

.login-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
}

.login-btn:hover {
    background-color: #0d2b4f;
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: #666;
    font-size: 0.9rem;
}

/* Header Styles */
header {
    background-color: white;
    color: var(--dark-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 10px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

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

.logo-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    /* background-color: var(--primary-color); */
}

.logo-icon img {
    width: 70px;
    height: auto;
}

.logo-text h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-text p {
    font-size: 0.8rem;
    color: #666;
}

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

.notification-icon {
    background: none;
    border: none;
    color: #666;
    font-size: 1.3rem;
    cursor: pointer;
    position: relative;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: #ff4757;
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    cursor: pointer;
}

/* Main Dashboard */
.dashboard {
    padding: 30px 0;
    min-height: calc(100vh - var(--header-height) - 80px);
}

.welcome-section {
    margin-bottom: 40px;
    text-align: center;
}

.welcome-section h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.welcome-section p {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Circular Cards Grid */
.portal-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

/* Card default responsive */
    .portal-card {
        background: white;
        border-radius: var(--card-radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        transition: var(--transition);
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 30px 20px;
        justify-content: center;
        margin: 0 auto;
        position: relative;

        width: 100%;
        max-width: 280px; /* max width on big screen */
        height: auto;
        aspect-ratio: 1 / 1; /* keep square shape */
    }

    /* ✅ Mobile size 258 × 248 only on small screen */
 

.portal-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
}

.portal-card.teacher-attendance {
    border: 3px solid var(--card-color-1);
}

.portal-card.expense-management {
    border: 3px solid var(--card-color-2);
}

.portal-card.result-management {
    border: 3px solid var(--card-color-3);
}

.portal-card.fee-management {
    border: 3px solid var(--card-color-4);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: white;
}

.portal-card.teacher-attendance .card-icon {
    background-color: var(--card-color-1);
}

.portal-card.expense-management .card-icon {
    background-color: var(--card-color-2);
}

.portal-card.result-management .card-icon {
    background-color: var(--card-color-3);
}

.portal-card.fee-management .card-icon {
    background-color: var(--card-color-4);
}

.card-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.card-content p {
    margin-bottom: 20px;
    color: #666;
    font-size: 0.9rem;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    background-color: #0d2b4f;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.portal-card.teacher-attendance .btn {
    background-color: var(--card-color-1);
}

.portal-card.teacher-attendance .btn:hover {
    background-color: #0b7dda;
}

.portal-card.expense-management .btn {
    background-color: var(--card-color-2);
}

.portal-card.expense-management .btn:hover {
    background-color: #e64a19;
}

.portal-card.result-management .btn {
    background-color: var(--card-color-3);
}

.portal-card.result-management .btn:hover {
    background-color: #388E3C;
}

.portal-card.fee-management .btn {
    background-color: var(--card-color-4);
}

.portal-card.fee-management .btn:hover {
    background-color: #7B1FA2;
}

@media (max-width: 768px) {
    .portal-card {
        width: 258px !important;
        height: 248px !important;
        aspect-ratio: auto;
    }

    /* Grid center on tablet/mobile */
    .portal-cards {
        justify-content: center;
    }
}

/* Module Detail Pages */
.module-page {
    display: none;
    padding: 30px 0;
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.module-title {
    display: flex;
    align-items: center;
    gap: 15px;
}

.module-title i {
    font-size: 2rem;
    color: var(--primary-color);
}

.module-title h2 {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.module-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    padding: 10px 20px;
    background: #f5f5f5;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    font-weight: 500;
}

.action-btn:hover {
    background: #e0e0e0;
}

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

.action-btn.primary:hover {
    background: #0d2b4f;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 20px;
    transition: var(--transition);
}

.back-btn:hover {
    color: #0d2b4f;
}

/* Advanced Filter Section */
.advanced-filters {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 30px;
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.filter-header h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.filter-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
}

.filter-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.filter-group {
    display: flex;
    flex-direction: column;
}

.filter-group label {
    font-size: 0.9rem;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.filter-group select, .filter-group input {
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.filter-group select:focus, .filter-group input:focus {
    border-color: var(--primary-color);
    outline: none;
}

/* Data Visualization */
.data-visualization {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.chart-card {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 20px;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.chart-header h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
}

.chart-container {
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f9f9f9;
    border-radius: 8px;
    position: relative;
}

/* Data Table */
.data-table-container {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table-responsive {
    overflow-x: auto;
}

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

.data-table th, .data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--primary-color);
    position: sticky;
    top: 0;
}

.data-table tr:hover {
    background-color: #f9f9f9;
}

.status-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-present {
    background: #e8f5e9;
    color: #2e7d32;
}

.status-absent {
    background: #ffebee;
    color: #c62828;
}

.status-pending {
    background: #fff3e0;
    color: #ef6c00;
}

.status-paid {
    background: #e8f5e9;
    color: #2e7d32;
}

.status-unpaid {
    background: #ffebee;
    color: #c62828;
}

.amount-positive {
    color: #2e7d32;
    font-weight: 600;
}

.amount-negative {
    color: #c62828;
    font-weight: 600;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding: 15px 20px;
    background: #f8f9fa;
    border-top: 1px solid #eee;
}

.pagination-info {
    font-size: 0.9rem;
    color: #666;
}

.pagination-controls {
    display: flex;
    gap: 8px;
}

.pagination-btn {
    padding: 8px 12px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.pagination-btn:hover {
    background: #f0f0f0;
}

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

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.copyright {
    margin-top: 15px;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .portal-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .portal-card {
        height: 200px;
        width: 200px;
        padding: 20px 15px;
    }
    
    .card-icon {
        font-size: 2.5rem;
        width: 60px;
        height: 60px;
    }
    
    .filter-content {
        grid-template-columns: 1fr;
    }
    
    .data-visualization {
        grid-template-columns: 1fr;
    }
    
    .module-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .module-actions {
        width: 100%;
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .portal-cards {
        grid-template-columns: 1fr;
    }
    
    .portal-card {
        height: 180px;
        width: 180px;
    }
    
    .logo-text h1 {
        font-size: 1.1rem;
    }
    
    .welcome-section h2 {
        font-size: 1.6rem;
    }
    
    .login-container {
        padding: 30px 20px;
    }
}