style.css (디자인 담당)
CSS
/* 전체 기본 스타일 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif;
}

body {
    background-color: #f4f7f6;
    color: #333;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 5px;
}

.subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 30px;
}

/* 메인 레이아웃 (좌우 분할) */
.main-layout {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.input-section {
    flex: 1;
    min-width: 300px;
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.result-section {
    flex: 2;
    min-width: 500px;
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 입력 양식 스타일 */
h3 {
    margin-bottom: 15px;
    color: #34495e;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
}

.notice {
    font-size: 12px;
    color: #e74c3c;
    margin-bottom: 15px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #555;
}

textarea {
    width: 100%;
    height: 100px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    resize: vertical;
}

input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

.btn {
    width: 100%;
    padding: 15px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background-color: #2980b9;
}

/* 교실 및 칠판 디자인 */
.blackboard {
    width: 80%;
    background-color: #2d5a27;
    color: white;
    text-align: center;
    padding: 15px;
    font-weight: bold;
    border: 5px solid #8B4513;
    border-radius: 4px;
    margin-bottom: 40px;
    box-shadow: 0 4px 5px rgba(0,0,0,0.2);
}

.classroom-grid {
    width: 100%;
    display: grid;
    gap: 15px;
    justify-content: center;
}

.empty-msg {
    color: #aaa;
    grid-column: 1 / -1;
    text-align: center;
    margin-top: 5px;
}

/* 책상(자리) 스타일 */
.desk {
    background-color: #ecf0f1;
    border: 2px solid #bdc3c7;
    border-radius: 8px;
    padding: 15px 5px;
    text-align: center;
    font-weight: bold;
    font-size: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

/* 남/여 자리 색상 구분 (시각적 편의) */
.desk.male {
    background-color: #e8f4fd;
    border-color: #3498db;
    color: #2980b9;
}

.desk.female {
    background-color: #fde8ec;
    border-color: #e74c3c;
    color: #c0392b;
}

.desk.empty {
    background-color: #f9f9f9;
    border-style: dashed;
    color: #ccc;
}