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

:root {
    --primary-color: #1e3a8a;
    --secondary-color: #14b8a6;
    --accent-color: #0ea5e9;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f9fafb;
    --white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    padding: 40px 30px;
    text-align: center;
    color: var(--white);
}

.logo-container {
    margin-bottom: 20px;
}

.logo {
    max-width: 200px;
    height: auto;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.2));
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

main {
    padding: 40px 30px;
}

.search-section {
    margin-bottom: 30px;
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-group label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 1rem;
}

.input-group input {
    padding: 15px 20px;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    transition: all 0.3s ease;
    width: 100%;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.btn-search {
    padding: 15px 30px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    box-shadow: var(--shadow);
}

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

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

.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error {
    background: #fee2e2;
    color: var(--danger-color);
    padding: 15px 20px;
    border-radius: 10px;
    margin: 20px 0;
    border-left: 4px solid var(--danger-color);
}

.student-info {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    border-left: 5px solid var(--accent-color);
}

.student-info h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.student-info p {
    color: var(--text-light);
    font-size: 1.1rem;
    margin: 5px 0;
}

.exam-count {
    color: var(--accent-color) !important;
    font-weight: 600;
    margin-top: 10px !important;
}

.table-container {
    overflow-x: auto;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: var(--white);
}

th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}

tbody tr:hover {
    background-color: #f9fafb;
}

tbody tr:last-child {
    border-bottom: none;
}

td {
    padding: 15px;
    color: var(--text-color);
}

.status-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-eligible {
    background: #d1fae5;
    color: #065f46;
}

.status-not-eligible {
    background: #fee2e2;
    color: #991b1b;
}

.status-warning {
    background: #fef3c7;
    color: #92400e;
}

.no-results {
    text-align: center;
    padding: 60px 20px;
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.no-results h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.no-results p {
    color: var(--text-light);
    font-size: 1.1rem;
}

footer {
    background: var(--bg-color);
    padding: 20px;
    text-align: center;
    color: var(--text-light);
    border-top: 1px solid var(--border-color);
}

.hidden {
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header {
        padding: 30px 20px;
    }

    header h1 {
        font-size: 2rem;
    }

    .logo {
        max-width: 150px;
    }

    main {
        padding: 30px 20px;
    }

    .input-group input {
        font-size: 1rem;
    }

    .btn-search {
        width: 100%;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 10px 8px;
    }

    .student-info h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    table {
        font-size: 0.85rem;
    }

    th, td {
        padding: 8px 5px;
    }
}