@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display=swap');

:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --background-color: #f4f7f6;
    --card-background: #ffffff;
    --text-color: #333333;
    --light-text-color: #777777;
    --border-color: #dddddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    --level-1-color: #58D68D; /* 원활 */
    --level-2-color: #F4D03F; /* 보통 */
    --level-3-color: #E67E22; /* 혼잡 */
    --level-4-color: #C0392B; /* 매우 혼잡 */
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 20px;
}

.app-container {
    width: 100%;
    max-width: 600px;
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: 0 8px 25px var(--shadow-color);
    overflow: hidden;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 24px;
    text-align: center;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

main {
    padding: 24px;
}

#congestion-form .form-group {
    margin-bottom: 20px;
}

#congestion-form label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

#congestion-form select,
#congestion-form input[type="date"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: #fff;
}

#congestion-form select {
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23007CB2%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
}


#congestion-form button[type="submit"] {
    width: 100%;
    padding: 14px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#congestion-form button[type="submit"]:hover {
    background-color: #2980b9;
}

#results-container {
    margin-top: 28px;
    padding-top: 28px;
    border-top: 1px solid var(--border-color);
}

#results-title {
    font-size: 1.4rem;
    margin-bottom: 8px;
    text-align: center;
}

#weather-info {
    text-align: center;
    color: var(--light-text-color);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

#results-list {
    list-style: none;
}

#results-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    background-color: var(--background-color);
}

#results-list .level {
    font-weight: 700;
    padding: 6px 12px;
    border-radius: 20px;
    color: white;
    font-size: 0.9rem;
}

.level-1 { background-color: var(--level-1-color); }
.level-2 { background-color: var(--level-2-color); color: var(--text-color);}
.level-3 { background-color: var(--level-3-color); }
.level-4 { background-color: var(--level-4-color); }

.hidden {
    display: none;
}

footer {
    padding: 20px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--light-text-color);
    background-color: #f0f0f0;
}

@media (max-width: 480px) {
    body {
        padding: 0;
    }
    .app-container {
        border-radius: 0;
    }
}