/* リセットCSS */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f8f8;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* フォーム全体を白背景に */
#contactForm {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #2C3E50;
    text-align: center;
}

.form-description {
    margin-bottom: 2rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
    padding: 0;
    padding-bottom: 1.5rem;
}

.form-group:last-child {
    border-bottom: none;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.form-col {
    flex: 1;
    min-width: 200px;
}

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

.required::after {
    content: " *";
    color: #e74c3c;
}

input,
select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus,
select:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.error {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    display: none;
}

.button-container {
    margin-top: 2rem;
    text-align: center;
    border-bottom: none !important;
}

button {
    background-color: #3498db;
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

button:active {
    transform: translateY(1px);
}

/* 完了ページ用スタイル */
.complete-message {
    margin: 2rem auto;
    padding: 2rem;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.complete-message h1 {
    color: #2ecc71;
}

.button {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 0.8rem 1.5rem;
    margin-top: 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
}

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

/* レスポンシブ対応 */
@media (max-width: 768px) {
    h1 {
        font-size: 1.75rem;
    }

    #contactForm {
        padding: 1.5rem;
    }

    button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 1.5rem;
    }

    #contactForm {
        padding: 1rem;
    }

    .form-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    input,
    select {
        padding: 0.7rem;
    }
}