/* ========================================
   基本設定
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット */
    --color-primary: #2c2c2c;
    --color-secondary: #5a4a3a;
    --color-accent: #d32f2f;
    --color-bg-light: #fafaf8;
    --color-bg-white: #ffffff;
    --color-text: #2c2c2c;
    --color-text-light: #666666;
    --color-border: #e0e0e0;

    /* フォント */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Noto Sans JP', sans-serif;

    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.8;
    background-color: var(--color-bg-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   ファーストビュー
   ======================================== */
#first-view {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 1000px;
    background-color: var(--color-bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.first-view-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 愛媛県久谷産 - 右上 */
.location-text {
    position: absolute;
    top: 5%;
    right: 50%;
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-family: var(--font-serif);
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-right: -100px;
}

/* 炭火焙煎椎茸 - 中央上 */
.product-category {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 3vw, 1.8rem);
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--color-primary);
}

/* 媛子 - 中央メイン */
.main-title-wrapper {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.main-title {
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-family: var(--font-serif);
    font-size: clamp(4rem, 10vw, 6rem);
    font-weight: 900;
    letter-spacing: 0.3em;
    color: var(--color-primary);
    line-height: 1.2;
    position: relative;
    margin-top: 30px;
}

/* 謹製印章 */
.seal-image {
    position: absolute;
    top: 65%;
    right: -60px;
    width: clamp(40px, 6vw, 50px);
    height: auto;
    opacity: 0.95;
}

/* ®マーク */
.registered-mark {
    position: absolute;
    top: 80%;
    right: 10px;
    font-family: var(--font-sans);
    font-size: clamp(1rem, 2.2vw, 2rem);
    font-weight: 400;
    color: var(--color-primary);
}

/* サブコピー - 左側 */
.sub-copy {
    position: absolute;
    top: 35%;
    left: 50%;
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-family: var(--font-sans);
    font-size: clamp(0.85rem, 1.5vw, 1rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    line-height: 1.8;
    color: var(--color-primary);
    margin-left: -200px;
}

/* 山のイラスト */
.mountain-illustration {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translateX(-50%);
    width: clamp(250px, 70%, 600px);
    height: auto;
    opacity: 0.9;
}

/* 英字表記 */
.english-text {
    position: absolute;
    top: 80%;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-sans);
    font-size: clamp(0.7rem, 1.2vw, 0.8rem);
    font-weight: 600;
    letter-spacing: 0.3em;
    color: var(--color-text-light);
}

/* スクロールインジケーター */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: scrollBounce 2s infinite;
}

.scroll-indicator span {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-text-light), transparent);
}

@keyframes scrollBounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

/* ========================================
   共通セクションスタイル
   ======================================== */
.section {
    padding: var(--spacing-xxl) 0;
}

.section.bg-light {
    background-color: var(--color-bg-light);
}

.section.bg-dark {
    background-color: var(--color-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.section-title.center {
    text-align: center;
}

.section-title.white {
    color: var(--color-bg-white);
}

.section-subtitle {
    font-family: var(--font-sans);
    font-size: clamp(1rem, 2vw, 1.2rem);
    font-weight: 400;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.section-subtitle.center {
    text-align: center;
}

/* ========================================
   商品概要セクション
   ======================================== */
#product-intro .section-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.intro-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.intro-text {
    padding: var(--spacing-md);
}

.intro-description {
    font-size: clamp(0.95rem, 1.8vw, 1.1rem);
    line-height: 2;
    color: var(--color-text);
}

/* ========================================
   3つの理由セクション
   ======================================== */
.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.reason-card {
    background-color: var(--color-bg-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.reason-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.reason-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-bg-white);
}

.reason-title {
    font-family: var(--font-serif);
    font-size: clamp(1.3rem, 2.5vw, 1.5rem);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.reason-description {
    font-size: clamp(0.9rem, 1.6vw, 1rem);
    line-height: 1.9;
    color: var(--color-text-light);
    text-align: left;
}

/* ========================================
   製法セクション
   ======================================== */
.manufacturing-content {
    margin-top: var(--spacing-lg);
}

.manufacturing-process {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.process-step {
    background-color: var(--color-bg-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    border-left: 4px solid var(--color-accent);
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
}

.step-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.step-title {
    font-family: var(--font-serif);
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.step-description {
    font-size: clamp(0.9rem, 1.6vw, 1rem);
    line-height: 1.8;
    color: var(--color-text-light);
}

.manufacturing-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.manufacturing-image {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.manufacturing-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.manufacturing-image:hover img {
    transform: scale(1.05);
}

.image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: var(--color-bg-white);
    padding: var(--spacing-md);
    font-size: 1rem;
    text-align: center;
}

/* ========================================
   栄養価セクション
   ======================================== */
.nutrition-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.nutrition-card {
    background-color: var(--color-bg-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.nutrition-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, #333, #333);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-bg-white);
}

.nutrition-title {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 2.5vw, 1.4rem);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.nutrition-value {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.nutrition-description {
    font-size: clamp(0.9rem, 1.6vw, 1rem);
    line-height: 1.8;
    color: var(--color-text-light);
}

.nutrition-note {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-white);
    border-radius: 8px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
}

.nutrition-note h4 {
    font-family: var(--font-serif);
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.nutrition-table {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    border-collapse: collapse;
}

.nutrition-table th,
.nutrition-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.nutrition-table th {
    font-weight: 600;
    color: var(--color-primary);
    width: 40%;
}

.nutrition-table td {
    color: var(--color-text-light);
}

/* ========================================
   用途セクション
   ======================================== */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.usage-card {
    background-color: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.usage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.usage-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.usage-title {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 2.5vw, 1.4rem);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.usage-description {
    font-size: clamp(0.9rem, 1.6vw, 1rem);
    line-height: 1.8;
    color: var(--color-text-light);
}

/* ========================================
   レシピセクション
   ======================================== */
.recipe-credit {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}
.recipe-credit a {
    color:#333;
}
.recipe-credit a:hover {
    text-decoration:none;
}
.recipe-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.recipe-image {
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.recipe-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recipe-details {
    background-color: var(--color-bg-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.recipe-section {
    margin-bottom: var(--spacing-lg);
}

.recipe-section:last-child {
    margin-bottom: 0;
}

.recipe-section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 2.5vw, 1.4rem);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-accent);
}

.recipe-list,
.recipe-steps {
    padding-left: var(--spacing-md);
}

.recipe-list li,
.recipe-steps li {
    font-size: clamp(0.9rem, 1.6vw, 1rem);
    line-height: 2;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

/* ========================================
   商品情報セクション
   ======================================== */
.product-lineup {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.product-item {
    text-align: center;
    max-width: 700px;
}

.product-item img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--spacing-md);
}

.product-name {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 2.5vw, 1.4rem);
    font-weight: 600;
    color: var(--color-primary);
}

.product-details-box {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.product-table {
    width: 100%;
    border-collapse: collapse;
}

.product-table th,
.product-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.product-table th {
    font-weight: 600;
    color: var(--color-primary);
    width: 30%;
    background-color: rgba(255, 255, 255, 0.5);
}

.product-table td {
    color: var(--color-text);
}

/* ========================================
   お問い合わせセクション
   ======================================== */
.contact-info {
    max-width: 700px;
    margin: 0 auto 3rem;
    text-align: center;
}

.handling-info {
    padding: var(--spacing-lg);
}

.handling-text {
    font-size: clamp(0.95rem, 1.8vw, 1.05rem);
    line-height: 2;
    color: rgba(255, 255, 255, 0.9);
}

.company-section {
    max-width: 900px;
    margin: 0 auto;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.company-section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 2.5vw, 1.4rem);
    font-weight: 600;
    color: var(--color-bg-white);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.company-details-grid {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: var(--spacing-lg);
}

.company-detail-row {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.company-detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    font-family: var(--font-sans);
    font-size: clamp(0.9rem, 1.6vw, 1rem);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
}

.detail-value {
    font-family: var(--font-sans);
    font-size: clamp(0.9rem, 1.6vw, 1rem);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.95);
}

.company-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    display: inline-block;
}

.company-link:hover {
    color: #ffffff;
    border-bottom-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-1px);
}

/* 旧スタイルの削除用 */
.company-info {
    padding: var(--spacing-lg);
}

.company-name {
    font-family: var(--font-serif);
    font-size: clamp(1.3rem, 2.5vw, 1.5rem);
    font-weight: 600;
    color: var(--color-bg-white);
    margin-bottom: var(--spacing-md);
}

.company-details {
    font-size: clamp(1rem, 1.8vw, 1.1rem);
    line-height: 2;
    color: rgba(255, 255, 255, 0.9);
}



/* ========================================
   フッター
   ======================================== */
#footer {
    background-color: #1a1a1a;
    padding: var(--spacing-md) 0;
}

.footer-text {
    text-align: center;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   レスポンシブデザイン
   ======================================== */

/* タブレット */
@media (max-width: 768px) {
    :root {
        --spacing-xxl: 4rem;
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    #first-view {
        min-height: 500px;
    }

    .location-text {
        top: 10%;
        right: 50%;
        font-size: 0.85rem;
        margin-right: -60px;
    }

    .product-category {
        top: 12%;
        font-size: 1.5rem;
    }

    .main-title {
        font-size: 4.5rem;
    }

    .seal-image {
        width: 45px;
        right: -50px;
    }

    .sub-copy {
        left: 50%;
        font-size: 1rem;
        margin-left: -170px;
    }

    .mountain-illustration {
        width: 80%;
    }

    #product-intro .section-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .recipe-content {
        grid-template-columns: 1fr;
    }

    .manufacturing-images {
        grid-template-columns: 1fr;
    }
}

/* スマートフォン */
@media (max-width: 480px) {
    :root {
        --spacing-xxl: 3rem;
        --spacing-xl: 2rem;
        --spacing-lg: 1.5rem;
    }

    #first-view {
        min-height: 450px;
    }

    .location-text {
        top: 6%;
        right: 50%;
        font-size: 0.75rem;
        margin-right: -50px;
    }

    .product-category {
        top: 10%;
        font-size: 1.2rem;
    }

    .main-title {
        font-size: 3.5rem;
    }

    .seal-image {
        width: 30px;
        right: -40px;
    }

    .registered-mark {
        font-size: 1.2rem;
        right: 5px;
    }

    .sub-copy {
        left: 50%;
        font-size: 0.9rem;
        margin-left: -130px;
    }

    .mountain-illustration {
        width: 90%;
    }

    .english-text {
        font-size: 0.65rem;
    }

    .reasons-grid,
    .usage-grid {
        grid-template-columns: 1fr;
    }

    .manufacturing-process {
        grid-template-columns: 1fr;
    }

    .nutrition-comparison {
        grid-template-columns: 1fr;
    }

    .product-table th {
        width: 35%;
        font-size: 0.7rem;
        padding: 0;
        text-align: center;
    }

    .product-table td {
        font-size: 0.9rem;
    }

    .company-detail-row {
        display: block;

    }
}

/* ========================================
   アニメーション用クラス
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}