* {
    box-sizing: border-box;
    font-family: 'NanumSquareRound', sans-serif;
}

body {
    margin: 0;
    background: #f8f9fa;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
    padding: 20px;
}

.error-title {
    font-size: 36px;
    margin-bottom: 10px;
    color: #ff4757;
    font-weight: 800;
}

.subtitle {
    color: #666;
    font-size: 16px;
    margin-bottom: 40px;
}

.card-list {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap; 
}

.card {
    text-decoration: none;
    background: white;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
    transition: 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 280px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}

.card-title {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 15px;
    color: #2f3542;
}

.card-url {
    font-size: 14px;
    color: #2c7be5;
    background-color: #f1f4f9;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: bold;
    letter-spacing: 0.5px;
}