:root {
    --primary-color: #ff9900; /* Amazonオレンジ */
    --secondary-color: #232f3e; /* Amazonネイビー */
    --bg-color: #f6f6f6;
    --card-bg: #ffffff;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--secondary-color);
}

.container {
    width: 90%;
    max-width: 450px;
}

.card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    text-align: center;
}

h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.badge {
    background: var(--primary-color);
    color: white;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    vertical-align: middle;
}

.description {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 2rem;
}

/* 入力グループのスタイル */
.input-group {
    text-align: left;
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

input[type="text"],
input[type="url"],
input[type="email"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #eee;
    border-radius: 8px;
    box-sizing: border-box;
    transition: border-color 0.3s;
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ラジオボタンをおしゃれに */
.radio-group {
    display: flex;
    gap: 15px;
    background: #f9f9f9;
    padding: 10px;
    border-radius: 8px;
}

/* ボタン */
button {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 14px;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.3s;
    box-shadow: 0 4px 6px rgba(255, 153, 0, 0.2);
}

button:hover {
    background-color: #e68a00;
}

button:active {
    transform: scale(0.98);
}

/* アニメーション */
#form-section {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

#message {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    line-height: 1.4;
}