:root {
    --primary-color: #0056b3;
    --secondary-color: #f8f9fa;
    --text-color: #333;
    --border-radius: 8px;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #e9ecef;
    color: var(--text-color);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

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

header h1 {
    color: var(--primary-color);
    margin: 0;
}

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

.search-box {
    position: relative;
    display: flex;
    flex-direction: column;
}

input[type="text"] {
    width: 100%;
    padding: 15px;
    font-size: 18px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.3s;
}

input[type="text"]:focus {
    border-color: var(--primary-color);
}

.suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid #ddd;
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    z-index: 10;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.suggestion-item {
    padding: 10px 15px;
    cursor: pointer;
}

.suggestion-item:hover {
    background-color: var(--secondary-color);
}

.keywords {
    margin-top: 15px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.kw-btn {
    background: var(--secondary-color);
    border: 1px solid #ddd;
    padding: 5px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

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

.results-section {
    display: grid;
    gap: 15px;
}

.module-header {
    background: #f1f3f5;
    padding: 10px 15px;
    border-radius: 4px;
    font-weight: bold;
    color: #495057;
    margin-top: 10px;
}

.class-card {
    border: 1px solid #eee;
    padding: 15px;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s;
}

.class-card:hover {
    transform: translateX(5px);
    border-left: 4px solid var(--primary-color);
}

.class-info h3 {
    margin: 0;
    font-size: 16px;
}

.class-info p {
    margin: 5px 0 0;
    font-size: 12px;
    color: #6c757d;
    text-transform: uppercase;
}

.duration {
    background: #e7f1ff;
    color: var(--primary-color);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 14px;
    font-weight: bold;
}

.no-results {
    text-align: center;
    color: #6c757d;
    padding: 40px;
}