:root {
    --primary-dark: #697d60;
    --primary-green: #41634d;
    --light-green: #d1e0ad;
    --soft-yellow: #fff2c1;
    --soft-red: #ed9595;
    --gray: #A9A9A9;
    --peach: #FECDA6;
    --orange: #FF9130;
    --deep-orange: #FF5B22;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-dark) 100%);
    min-height: 100vh;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Login Page Styles */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 20px 60px rgba(65, 99, 77, 0.3);
    max-width: 450px;
    width: 100%;
    animation: slideUp 0.6s ease-out;
    border-top: 4px solid var(--primary-green);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card h1 {
    font-size: 32px;
    color: var(--primary-dark);
    margin-bottom: 10px;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 30px;
    font-size: 14px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary-dark);
    font-weight: 500;
    font-size: 14px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--light-green);
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    outline: none;
    background: var(--soft-yellow);
}

.input-group input:focus {
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(65, 99, 77, 0.1);
    background: white;
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(65, 99, 77, 0.4);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-green) 100%);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Dashboard Styles */
.navbar {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-dark) 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-content h2 {
    color: white;
    font-size: 24px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.staff-email {
    color: var(--soft-yellow);
    font-size: 14px;
    font-weight: 500;
}

.btn-secondary {
    padding: 10px 24px;
    background: var(--soft-yellow);
    color: var(--primary-dark);
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--peach);
    transform: translateY(-2px);
}

.dashboard-container {
    max-width: 1400px;
    margin: 30px auto;
    padding: 0 30px;
}

/* Form Section */
.form-section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-left: 5px solid var(--primary-green);
}

.form-section h3 {
    color: var(--primary-dark);
    margin-bottom: 25px;
    font-size: 22px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.btn-cancel {
    padding: 14px 30px;
    background: var(--light-green);
    color: var(--primary-dark);
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-cancel:hover {
    background: var(--peach);
    transform: translateY(-2px);
}

/* Students Section */
.students-section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-left: 5px solid var(--orange);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.section-header h3 {
    color: var(--primary-dark);
    font-size: 22px;
}

.search-box input {
    padding: 10px 16px;
    border: 2px solid var(--light-green);
    border-radius: 8px;
    font-size: 14px;
    width: 300px;
    outline: none;
    transition: all 0.3s ease;
    background: var(--soft-yellow);
}

.search-box input:focus {
    border-color: var(--primary-green);
    background: white;
}

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

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

.students-table thead {
    background: linear-gradient(135deg, var(--light-green) 0%, var(--soft-yellow) 100%);
}

.students-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--primary-dark);
    font-size: 14px;
    border-bottom: 2px solid var(--primary-green);
}

.students-table td {
    padding: 15px;
    border-bottom: 1px solid var(--light-green);
    color: #555;
    font-size: 14px;
}

.students-table tbody tr {
    transition: background 0.2s ease;
}

.students-table tbody tr:hover {
    background: var(--soft-yellow);
}

.action-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 8px;
}

.edit-btn {
    background: var(--orange);
    color: white;
}

.edit-btn:hover {
    background: var(--deep-orange);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 145, 48, 0.4);
}

.delete-btn {
    background: var(--soft-red);
    color: white;
}

.delete-btn:hover {
    background: #e07373;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(237, 149, 149, 0.4);
}

.error-message {
    color: var(--soft-red);
    font-size: 14px;
    margin-top: 15px;
    text-align: center;
    font-weight: 500;
}

.loading,
.no-data {
    text-align: center;
    padding: 40px;
    color: var(--gray);
    font-size: 16px;
}

.loading {
    display: none;
}

.no-data {
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-card {
        padding: 30px;
    }

    .nav-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        gap: 15px;
    }

    .search-box input {
        width: 100%;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn-primary,
    .btn-cancel {
        width: 100%;
    }
}