@charset "utf-8";
/* CSS Document */

/* --- リセット & 全体設定 --- */
html {
    scroll-behavior: smooth;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    color: #333333;
    background-color: #faf9f6;
    line-height: 1.8;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}


/* 共通の設定
================================================== */

.margin_bottom_20 {
  margin-bottom: 20px;
}
.margin_bottom_30 {
  margin-bottom: 30px;
}
.margin_bottom_50 {
  margin-bottom: 50px;
}
.margin_bottom_80 {
  margin-bottom: 80px;
}
.margin_bottom_100 {
  margin-bottom: 100px;
}
.margin_bottom_120 {
  margin-bottom: 120px;
}
.margin_bottom_200 {
  margin-bottom: 200px;
}
.margin_bottom_300 {
  margin-bottom: 300px;
}

/* --- ヒーローエリア --- */
.hero-section {
    background-color: #e2e8f0;
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url("https://www.by-the-sea.info/allergy_free/images/title.webp");
    background-size: cover;
    background-position: center;
    height: 70vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.hero-content {
    max-width: 600px;
    padding: 20px;
}
.hero-content .sub-title {
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: #fff;
    text-transform: uppercase;
    display: block;
    margin-bottom: 10px;
}
.hero-content h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    line-height: 1.4;
    color: #fff;
    margin-bottom: 20px;
}
.hero-content p {
    font-size: 0.9rem;
    color: #fff;
    margin-bottom: 30px;
}
.btn {
    display: inline-block;
    background-color: #000;
    color: #ffffff;
    padding: 12px 40px;
    text-decoration: none;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}
.btn:hover {
    background-color: #4a5568;
}
.note{
    font-size:0.75rem;
    font-weight: 700;
}

/* --- 共通セクションタイトル --- */
.section-title {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: 10px;
    position: relative;
    color: #1a202c;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 1px;
    background-color: #a0aec0;
    display: none;
}
.section-subtitle {
    text-align: center;
    font-size: 0.9rem;
    color: #718096;
    letter-spacing: 0.05em;
    margin-bottom: 50px;
    position: relative;
}
.section-subtitle::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 1px;
    background-color: #a0aec0;
}

/* --- 特集イントロ/こだわり --- */
.features-section {
    padding: 80px 0;
    background-color: #ffffff;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}
.feature-card {
    text-align: center;
    padding: 20px;
}
.feature-images {
    width: 100%;
    margin: 0 auto 15px; 
    display: flex;
    align-items: center;
    justify-content: center;
}
.feature-images img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 15px;
    color: #2d3748;
}
.feature-card p {
    font-size: 0.9rem;
    color: #718096;
    text-align: justify;
}
.features-btn-area {
    text-align: center;
    margin-top: 50px; 
}

/* 枠線タイプのボタンデザイン */
.btn-outline {
    background-color: #ffffff;
    color: #2d3748;
    border: 1px solid #2d3748;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background-color: #2d3748;
    color: #ffffff;
}


/* アピールポイント
================================================== */
.item-box {
    display: flex;
    align-items: center;
    gap: 60px;
    margin: 0 auto 50px;
}
.item-box.reverse {
    flex-direction: row-reverse;
}
.item-img {
    max-width: 500px;
    flex: 1;
}
.item-img img {
    width: 100%;
    object-fit: cover;
    border-radius: 20px;
}
.item-text {
    flex: 1;
}
.item-jp {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 20px;
}
.item-desc {
    font-size: 0.9rem;
    color: #666;
    line-height: 2;
    margin-bottom: 30px;
}
.fade-in-image{
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    aspect-ratio: 1/1;
    object-fit: cover;
}
.fade-in-image.visible {
    opacity: 1;
    transform: translateY(0);
}


/* --- 商品一覧 --- */
.products-section {
    padding: 80px 0;
    scroll-margin-top: 40px;
}
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}
.product-item {
    background-color: #ffffff;
    border: 1px solid #edf2f7;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 20px;
}
.product-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}
.product-image img {
    width: 100%;
    height: auto;
    display: block;
}
.product-info {
    padding: 25px;
    text-align: center;
}
.product-info .product-name {
    font-size: 0.8rem;
    font-weight: 400;
    color: #2d3748;
    min-height: 2.8em;
}
.product-info .amount {
    font-size: 1.2rem;
    font-weight: 500;
    color: #718096;
    margin-bottom: 20px;
}
.yen{
    font-size: 0.75rem;
    font-weight: 500;
    color: #718096;
}
.detail-link {
    display: inline-block;
    font-size: 0.85rem;
    color: #2d3748;
    text-decoration: none;
    border-bottom: 1px solid #2d3748;
    padding-bottom: 2px;
    transition: color 0.3s, border-color 0.3s;
}
.detail-link:hover {
    color: #a0aec0;
    border-color: #a0aec0;
}

/* --- 当店のチタンジュエリーのこだわり --- */
.concept-section {
    padding: 90px 0;
    background-color: #ffffff;
}
.concept-wrapper {
    max-width: 800px;
    margin: 0 auto;
}
.concept-block {
    margin-bottom: 45px;
    padding-bottom: 40px;
    border-bottom: 1px dashed #e2e8f0;
}
.concept-block:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}
.concept-block h3 {
    font-size: 1.25rem;
    font-weight: 500;
    color: #1a202c;
    margin-bottom: 15px;
    letter-spacing: 0.05em;
    position: relative;
    padding-left: 15px;
}
.concept-block h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 70%;
    background-color: #718096;
}
.concept-block p {
    font-size: 0.95rem;
    color: #4a5568;
    line-height: 1.9;
    text-align: justify;
}


/* --- 純チタンジュエリーをお楽しみ頂くために --- */
.columns-section {
    padding: 90px 0;
    background-color: #f8fafc;
}
.columns-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
}
.column-card {
    display: block;
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}
.column-card:hover {
    transform: translateY(-5px);
    border-color: #cbd5e1;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}
.column-card-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    height: 100%;
}
.column-tag {
    font-size: 0.7rem;
    font-weight: 600;
    color: #718096;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    text-transform: uppercase;
}
.column-img {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    margin-bottom: 16px;
    background-color: #edf2f7;
}
.column-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.column-card:hover .column-img img {
    transform: scale(1.05);
}
.column-card h3 {
    font-size: 1.05rem;
    font-weight: 500;
    color: #1a202c;
    line-height: 1.5;
    margin-bottom: 12px;
}
.column-card p {
    font-size: 0.85rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 20px;
    flex-grow: 1;
}
.column-more {
    font-size: 0.8rem;
    color: #4a5568;
    font-weight: 500;
    position: relative;
    padding-right: 15px;
    align-self: flex-start;
}
.column-more::after {
    content: '→';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    transition: transform 0.3s ease;
}
.column-card:hover .column-more::after {
    transform: translateY(-50%) translateX(4px);
}


/* --- フッター --- */
.footer-section {
    background-color: #2d3748;
    color: #a0aec0;
    text-align: center;
    padding: 40px 20px;
}
.footer-section img{
    max-width: 100%;
    width: 150px;
}

/* --- レスポンシブ対応 (スマホ用) --- */
@media (max-width: 768px) {
.hero-content h1 {
    font-size: 1.8rem;
}  
.section-title {
    font-size: 1.5rem;
}
.section-subtitle {
    font-size: 0.8rem;
    padding: 0 15px;
    margin-bottom: 40px;
}
.item-box {
    flex-direction: column;
    gap: 30px;
    margin-bottom: 40px;
}
.item-box.reverse {
    flex-direction: column; 
}
.item-img {
    width: 100%;
    max-width: 100%;
}
.item-text {
    width: 100%;
    text-align: center;
} 
.item-jp {
    font-size: 1.3rem;
    margin-bottom: 15px;
}
.item-desc {
    text-align: left;
    display: inline-block;
    margin-bottom: 20px;
}
.products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 5px;
}
.product-info {
    padding: 15px 10px;
}
.product-info .product-name {
    font-size: 0.75rem;
    min-height: 3.4em;
    margin: 0;
    padding: 0;
    }
.product-info .amount {
    font-size: 0.95rem;
    margin: -15px 0 12px;
}
.yen{
    font-size: 0.65rem;
}
.detail-link {
    font-size: 0.75rem;
}
.concept-section {
    padding: 60px 0;
}
.concept-block h3 {
    font-size: 1.1rem;
    padding-left: 12px;
}
.concept-block p {
    font-size: 0.85rem;
    line-height: 1.7;
}
}

@media (max-width: 1024px) {
.columns-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
}

@media (max-width: 640px) {
.columns-section {
    padding: 60px 0;
}
.columns-grid {
    grid-template-columns: 1fr;
    gap: 16px;
}
.column-card-content {
    padding: 20px;
}
}


/* PCのみ
================================================== */
@media(max-width:788px){
.pc{
    display: none !important;
}
}
    
/* SPのみ
================================================== */
@media(min-width:789px){
.sp{
    display: none !important;
}
}