/* Bendri elementų stiliai */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Logo stiliai */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-text {
    font-size: 2rem;
    font-weight: bold;
    color: #7bb3d3;
    letter-spacing: 2px;
}

.owl {
    width: 40px;
    height: 40px;
    background: #ff9500;
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.owl::before {
    content: '🦉';
    font-size: 20px;
}

/* PRISIJUNGIMO PUSLAPIO STILIAI */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    text-align: center;
    animation: slideUp 0.6s ease;
}

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

.logo-section {
    margin-bottom: 2rem;
}

.logo-section h1 {
    color: #4a90e2;
    margin: 1rem 0 0.5rem;
    font-size: 1.8rem;
}

.logo-section p {
    color: #666;
    font-size: 1rem;
}

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

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e1e1;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #4a90e2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.user-type {
    margin-bottom: 1.5rem;
}

.user-type label {
    color: #555;
    font-weight: 500;
    margin-bottom: 0.8rem;
    display: block;
}

.radio-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.radio-option:hover {
    background-color: #f8f9fa;
}

.radio-option input[type="radio"] {
    width: auto;
    margin: 0;
}

.login-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(74, 144, 226, 0.3);
}

.login-help {
    margin-bottom: 2rem;
    color: #666;
}

.login-help a {
    color: #4a90e2;
    text-decoration: none;
    transition: color 0.3s ease;
}

.login-help a:hover {
    color: #357abd;
}

.login-help .separator {
    margin: 0 10px;
    color: #ccc;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: #888;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #4a90e2;
}

.copyright {
    color: #999;
    font-size: 0.8rem;
}

/* DIENYNO PUSLAPIO STILIAI */
.diary-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    color: #666;
}

.user-name {
    font-size: 0.95rem;
}

.separator {
    color: #ccc;
}

.department {
    font-size: 0.9rem;
    color: #888;
}

.logout-btn {
    background: #dc3545;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background: #c82333;
    transform: translateY(-1px);
}

.container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.welcome-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    text-align: center;
}

.welcome-card h1 {
    color: #4a90e2;
    margin-bottom: 1rem;
    font-size: 2.5rem;
}

.welcome-card p {
    color: #666;
    font-size: 1.1rem;
}

.dashboard {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.sidebar {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    height: fit-content;
}

.class-selector {
    margin-bottom: 2rem;
}

.class-selector h3 {
    color: #4a90e2;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.class-list {
    list-style: none;
}

.class-item {
    padding: 1rem;
    margin-bottom: 0.8rem;
    background: #f8f9fa;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
    font-size: 0.95rem;
}

.class-item:hover, .class-item.active {
    background: #e3f2fd;
    border-left-color: #4a90e2;
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.15);
}

.stats-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    text-align: center;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.quick-actions {
    margin-top: 2rem;
}

.quick-actions h4 {
    color: #4a90e2;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.action-btn {
    width: 100%;
    padding: 10px 15px;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 8px;
    transition: all 0.3s ease;
    text-align: left;
    font-size: 0.9rem;
}

.action-btn:hover {
    background: #e9ecef;
    border-color: #4a90e2;
    transform: translateX(3px);
}

.main-content {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.grades-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f0f0f0;
    flex-wrap: wrap;
    gap: 1rem;
}

.grades-header h2 {
    color: #4a90e2;
    font-size: 1.8rem;
}

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

.subject-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.subject-tab {
    padding: 12px 24px;
    background: #f8f9fa;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.95rem;
}

.subject-tab.active {
    background: #4a90e2;
    color: white;
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.subject-tab:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.notification {
    background: #d4edda;
    border-left: 4px solid #28a745;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.table-container {
    overflow-x: auto;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.grades-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    min-width: 800px;
}

.grades-table th,
.grades-table td {
    padding: 12px 8px;
    text-align: center;
    border-bottom: 1px solid #eee;
    vertical-align: middle;
}

.grades-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #4a90e2;
    position: sticky;
    top: 0;
    z-index: 10;
}

.grades-table tr:hover {
    background: #f8f9fa;
}

.student-name {
    text-align: left !important;
    min-width: 180px;
    font-weight: 500;
}

.grade-input {
    width: 60px;
    padding: 6px 8px;
    border: 2px solid #ddd;
    border-radius: 6px;
    text-align: center;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.grade-input:focus {
    outline: none;
    border-color: #4a90e2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
    transform: scale(1.05);
}

.grade-10 { background: #d4edda; color: #155724; border-color: #28a745; }
.grade-9 { background: #d1ecf1; color: #0c5460; border-color: #17a2b8; }
.grade-8 { background: #fff3cd; color: #856404; border-color: #ffc107; }
.grade-7 { background: #f8d7da; color: #721c24; border-color: #dc3545; }
.grade-6 { background: #f5c6cb; color: #721c24; border-color: #dc3545; }

.average-cell {
    font-weight: bold;
    font-size: 1.1rem;
    color: #4a90e2;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    font-size: 0.95rem;
}

.btn-primary {
    background: #4a90e2;
    color: white;
}

.btn-primary:hover {
    background: #357abd;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
    box