:root {
    --primary-color: #23b5d3;
    --secondary-color: #23b5d3;
    --background-color: #f7f5f0;
    --text-color: #333;
    --error-color: #e74c3c;
}

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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
}
.logo a{
    color: #fff;
    text-decoration: none;
}
.logo i {
    margin-right: 0.5rem;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #ecf0f1;
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 2rem;
}

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

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.calculator {
    background-color: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.calculator h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

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

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

input[type="number"] {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ccc;
    border-radius: 10px;
    font-size: 1rem;
}

.btn-calculate {
    display: block;
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-calculate:hover {
    background-color: var(--secondary-color);
}

.error-message {
    background-color: var(--error-color);
    color: white;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

.error-message i {
    margin-right: 0.5rem;
}

footer {
    text-align: center;
    padding: 1rem 0;
    background-color: var(--primary-color);
    color: white;
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
    }

    nav ul {
        margin-top: 1rem;
    }

    nav ul li {
        margin-left: 0;
        margin-right: 1.5rem;
    }

    .hero h1 {
        font-size: 2rem;
    }
}

.shipping-methods {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    background: #fff;
}

.shipping-methods th,
.shipping-methods td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

.shipping-methods th {
    background-color: #f2f2f2;
    font-weight: bold;
}

.shipping-methods tr:nth-child(even) {
    background-color: #f9f9f9;
}

.shipping-methods tr:hover {
    background-color: #f5f5f5;
}

.shipping-methods tr.recommended {
    background-color: #e1f5fe;
}

.shipping-methods tr.recommended:hover {
    background-color: #b3e5fc;
}

.recommended-badge {
    background-color: #4CAF50;
    color: white;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 0.8em;
    margin-left: 10px;
}

.btn-details {
    display: inline-block;
    padding: 5px 10px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.btn-details:hover {
    background-color: var(--secondary-color);
}

.shipping-methods.unavailable {
    opacity: 0.7;
    
}

.shipping-methods.unavailable th {
    background-color: #ffcdd2;
}

.shipping-methods.unavailable tr:nth-child(even) {
    background-color: #ffebee;
}

.shipping-methods.unavailable tr:hover {
    background-color: #ffcdd2;
}

@media screen and (max-width: 600px) {
    .shipping-methods {
        font-size: 14px;
    }

    .shipping-methods th,
    .shipping-methods td {
        padding: 8px;
    }

    .btn-details {
        padding: 3px 6px;
        font-size: 12px;
    }
}

.method-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.method-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.shipping-methods td:first-child {
    font-weight: bold;
}
.shipping-methods th,
.shipping-methods td {
    text-align: center;
}
.shipping-methods td:nth-child(1),
.shipping-methods td:nth-child(3) {
    text-align: left;
}
.recommended-info{
    background: #e79d9d;
    margin: 1em 0;
    padding: 1em;
    color: #fff;
    border-radius: 10px;
    
}
.recommended-info .way{
    text-align: center;
    font-size: 1.2em;
    font-weight: bold;
    padding: 1em 0;
}
.recommended-info .intro{
    text-align: center;
    font-size: 1em;
}
.recommended-info .notice{
    font-size: 0.7em;
}
.package-info{
    margin: 2em 0;
    font-size: 0.8em;
    line-height: 1.5;
}
/* 新着情報のスタイル */
.news-section {
    margin: 20px 0;
    padding: 15px;
    background: #f5f5f5;
    border-radius: 8px;
}

.news-section h2 {
    font-size: 1.2em;
    color: #333;
    margin-bottom: 10px;
    padding-bottom: 5px;
    border-bottom: 2px solid #4a90e2;
}

.news-item {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.news-date {
    color: #666;
    font-size: 0.9em;
}

.news-badge {
    background: #4a90e2;
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8em;
}

.news-text {
    color: #333;
}

/* レスポンシブ対応 */
@media screen and (max-width: 600px) {
    .news-item {
        font-size: 0.9em;
    }
}