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

body {
    font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 16px;
}

header {
    text-align: center;
    padding: 24px 0 16px;
}

header h1 {
    font-size: 1.6rem;
    margin-bottom: 12px;
}

nav {
    display: flex;
    justify-content: center;
    gap: 16px;
}

nav a {
    color: #4a90d9;
    text-decoration: none;
    font-weight: bold;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

nav a:hover {
    background-color: #e8f0fe;
}

main {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 24px;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

/* Form */
.form-group {
    margin-bottom: 24px;
}

.form-group > label {
    display: block;
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 1.05rem;
}

.radio-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
    font-weight: normal;
}

.radio-label:hover {
    border-color: #4a90d9;
    background-color: #f0f6ff;
}

.radio-label input:checked + span {
    color: #4a90d9;
    font-weight: bold;
}

.radio-label:has(input:checked) {
    border-color: #4a90d9;
    background-color: #e8f0fe;
}

input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

input[type="text"]:focus {
    outline: none;
    border-color: #4a90d9;
}

.btn {
    display: inline-block;
    background-color: #4a90d9;
    color: #fff;
    border: none;
    padding: 14px 32px;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: #357abd;
}

/* Errors */
.errors {
    background-color: #fef2f2;
    border: 1px solid #fca5a5;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 20px;
}

.errors ul {
    list-style: none;
    color: #dc2626;
}

.errors li::before {
    content: "⚠ ";
}

/* Thanks */
.thanks {
    text-align: center;
    padding: 32px 0;
}

.thanks h2 {
    color: #16a34a;
    margin-bottom: 12px;
}

.thanks p {
    margin-bottom: 24px;
    color: #666;
}

/* Charts */
.chart-section {
    margin-bottom: 32px;
}

.chart-section h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: #2c3e50;
}

.chart-wrapper {
    position: relative;
    max-width: 100%;
}

.movie-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.movie-tag {
    display: inline-block;
    background-color: #e8f0fe;
    color: #2c3e50;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.95rem;
}

.no-data {
    color: #999;
    font-style: italic;
}

/* Footer */
footer {
    text-align: center;
    padding: 16px 0;
    color: #999;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 480px) {
    .radio-group {
        grid-template-columns: 1fr 1fr;
    }

    header h1 {
        font-size: 1.3rem;
    }
}