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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #f8fafc;
    --accent-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

/* Login Styles */
.login-container {
    padding: 3rem;
    max-width: 400px;
    text-align: center;
}

.login-header {
    margin-bottom: 2rem;
}

.login-header .logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.login-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    text-align: left;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group i {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
    z-index: 1;
}

.input-group input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--bg-primary);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.login-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.error-message {
    background: #fef2f2;
    color: var(--danger-color);
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid #fecaca;
    display: none;
    text-align: left;
}

/* Dashboard Layout */
.dashboard {
    display: flex;
    min-height: 100vh;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.dashboard.active {
    opacity: 1;
    visibility: visible;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header .logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.sidebar-header .logo i {
    font-size: 1.5rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-right: 3px solid transparent;
}

.nav-item:hover,
.nav-item.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-right-color: var(--primary-color);
}

.nav-item i {
    font-size: 1.25rem;
    width: 20px;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.logout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
}

.menu-toggle:hover {
    background: var(--bg-secondary);
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    transition: background 0.3s ease;
}

.user-profile:hover {
    background: var(--bg-secondary);
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-info span {
    font-weight: 600;
    color: var(--text-primary);
}

.user-info small {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Content */
.content {
    flex: 1;
    padding: 2rem;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.stat-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Quick Actions */
.quick-actions {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.quick-actions h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.action-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--text-primary);
}

.action-card:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-card i {
    font-size: 2rem;
}

.action-card span {
    font-weight: 600;
}

/* Profile Section */
.profile-container {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.profile-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.profile-avatar img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid rgba(255, 255, 255, 0.2);
    object-fit: cover;
}

.profile-info h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.profile-info p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.profile-badges {
    display: flex;
    gap: 0.5rem;
}

.badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

.profile-details {
    padding: 2rem;
}

.detail-group {
    margin-bottom: 2rem;
}

.detail-group label {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: block;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.detail-item {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.detail-item .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    display: block;
    margin-bottom: 0.25rem;
}

.detail-item .value {
    font-weight: 600;
    color: var(--text-primary);
}

/* Fees Section */
.fees-overview {
    margin-bottom: 2rem;
}

.fees-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.fees-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

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

.fees-card.total .fees-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.fees-card.paid .fees-icon {
    background: linear-gradient(135deg, var(--accent-color), #059669);
}

.fees-card.pending .fees-icon {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.fees-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.fees-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.fees-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.fees-history {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.fees-history h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

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

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

.fees-table th {
    background: var(--bg-secondary);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.fees-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.fees-table tr:hover {
    background: var(--bg-secondary);
}

.fees-table .loading {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

/* Documents Section */
.documents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.document-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.document-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.document-info {
    flex: 1;
}

.document-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.document-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.document-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.document-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ID Card Modal */
.id-card-modal {
    max-width: 600px;
    padding: 0;
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.id-card-container {
    padding: 2rem;
    display: flex;
    justify-content: center;
}

/* ID Card with specified dimensions: 2.63" x 3.88" */
.id-card {
    width: 2.63in;
    height: 3.88in;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    color: white;
    display: flex;
    flex-direction: column;
}

.card-header {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.institute-logo {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 8px;
    font-size: 14px;
}

.institute-info h3 {
    font-size: 8px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 2px;
    text-transform: uppercase;
}

.institute-info p {
    font-size: 6px;
    opacity: 0.9;
    line-height: 1.2;
}

.card-body {
    flex: 1;
    padding: 12px;
    display: flex;
    gap: 8px;
}

.student-photo {
    width: 60px;
    height: 70px;
    flex-shrink: 0;
}

.student-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.student-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.student-details h4 {
    font-size: 9px;
    font-weight: 700;
    margin-bottom: 4px;
    line-height: 1.2;
    text-transform: uppercase;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 6px;
    line-height: 1.2;
}

.detail-row .label {
    font-weight: 600;
    opacity: 0.9;
    min-width: 25px;
}

.detail-row .value {
    font-weight: 500;
    text-align: right;
    flex: 1;
    margin-left: 4px;
}

.card-footer {
    padding: 8px 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.validity {
    font-size: 5px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 6px;
    border-radius: 8px;
}

.qr-code {
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 8px;
}

.card-actions {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.action-btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-btn.primary {
    background: var(--primary-color);
    color: white;
    border: none;
}

.action-btn.primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

.action-btn.secondary:hover {
    background: var(--border-color);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        width: 250px;
        background: var(--sidebar-bg, #fff);
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        z-index: 9999;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    /* Optional overlay when sidebar is open */
    body.mobile-menu-open::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.4);
        z-index: 999;
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle {
        display: block;
    }
}


@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .content {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .actions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .fees-cards {
        grid-template-columns: 1fr;
    }
    
    .documents-grid {
        grid-template-columns: 1fr;
    }
    
    .user-info {
        display: none;
    }
    
    .login-container {
        padding: 2rem 1.5rem;
    }
    
    .id-card {
        transform: scale(0.8);
    }
    
    .card-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .actions-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 1rem;
        max-width: calc(100vw - 2rem);
    }
    
    .id-card {
        transform: scale(0.7);
    }
}

/* Print Styles */
@media print {
    body * {
        visibility: hidden;
    }
    
    .id-card,
    .id-card * {
        visibility: visible;
    }
    
    .id-card {
        position: absolute;
        left: 0;
        top: 0;
        transform: none !important;
    }
    
    .modal,
    .card-actions,
    .modal-header {
        display: none !important;
    }
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Smooth Transitions */
* {
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}