/* Lesson Details Page Styles */

/* Base reset and typography for lesson page */
:root {
    color-scheme: only light;
    /* 新しいカラーパレット */
    --color-base: #F8F8F8;
    --color-main: #4B4B4B;
    --color-accent: #D4A373;
    --color-sub: #8E9AAF;
    --color-white: #FFFFFF;
}

/* SEO and Performance optimizations */
/* 重要でない画像の遅延読み込み */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* フォント表示の最適化 */
@font-face {
    font-family: 'Yu Mincho';
    font-display: swap;
}

/* アクセシビリティの改善 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* フォーカス表示の改善 */
:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* リンクのアクセシビリティ改善 */
a:focus {
    background-color: rgba(212, 163, 115, 0.1);
    border-radius: 4px;
}

/* 構造化データとセマンティックHTML用のスタイル */
article[itemscope] {
    position: relative;
}

section[aria-labelledby] {
    margin-bottom: 3rem;
}

/* キャンセルポリシーのスタイル改善 */
.application-note {
    background-color: rgba(212, 163, 115, 0.1);
    border-left: 4px solid var(--color-accent);
    padding: 1.5rem;
    margin-top: 2rem;
    border-radius: 0 8px 8px 0;
}

.application-note h4 {
    margin-bottom: 1rem;
    color: var(--color-accent);
    font-size: 1.1rem;
}

.application-note ul {
    margin: 0;
    padding-left: 1.2rem;
}

.application-note li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Helvetica Neue", Arial, sans-serif;
    color: var(--color-main);
    line-height: 1.6;
    background-color: var(--color-base);
}

h1,
h2,
h3,
h4 {
    font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
    margin: 0 0 0.5em;
    color: var(--color-main);
}

p {
    margin: 0 0 1em;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

a:hover,
a:focus {
    text-decoration: underline;
}

ul,
ol {
    margin: 0 0 1em 1.2em;
    padding: 0;
}

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

/* Hero section for lesson page */
.hero {
    position: relative;
    overflow: hidden;
    background: none;
    color: #fff;
    text-align: center;
    padding: 6rem 1.5rem;
}

.hero--lesson {
    background: linear-gradient(135deg, var(--color-sub) 0%, var(--color-main) 100%);
    min-height: 40vh;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: transparent;
    z-index: 1;
}

.hero__content {
    max-width: 720px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero__content h1 {
    font-size: clamp(2.2rem, 4vw, 3rem);
    letter-spacing: 0.08rem;
}

.hero__content p {
    max-width: 540px;
    margin: 1rem auto 2rem;
    font-size: 1.125rem;
}

.hero__links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Button styles */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    border-radius: 999px;
    font-weight: 600;
    background-color: var(--color-white);
    color: var(--color-accent);
    border: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover,
.button:focus {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(75, 75, 75, 0.15);
    text-decoration: none;
}

.button--outline {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

.button--outline:hover,
.button--outline:focus {
    background-color: rgba(255, 255, 255, 0.15);
}

.button--lesson {
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(212, 163, 115, 0.3);
}

.button--lesson:hover,
.button--lesson:focus {
    background-color: var(--color-main);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(212, 163, 115, 0.4);
}

/* Section styles */
.section {
    padding: 4rem 1.5rem;
}

.section__inner {
    max-width: 1040px;
    margin: 0 auto;
}

/* Lesson Details Page Specific Styles */
.lesson-detail-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

.lesson-header {
    text-align: center;
    margin-bottom: 3rem;
}

.lesson-description {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 1rem auto;
}

.lesson-details-grid {
    margin-bottom: 3rem;
}

.lesson-info-card,
.lesson-menu-card {
    background-color: var(--color-white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(75, 75, 75, 0.1);
}

.lesson-info-card h3,
.lesson-menu-card h3 {
    color: var(--color-accent);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--color-base);
    padding-bottom: 0.5rem;
}

.lesson-details-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.lesson-details-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 1.1rem;
}

.lesson-details-list li:last-child {
    border-bottom: none;
}

.lesson-details-list strong {
    color: var(--color-accent);
    font-weight: 600;
}

/* Font Awesome アイコンのスタイル */
.lesson-details-list i {
    color: var(--color-accent);
    margin-right: 0.5rem;
    font-size: 1.1rem;
    width: 20px;
    display: inline-block;
}

.menu-list h4 i {
    color: var(--color-accent);
    margin-right: 0.5rem;
    font-size: 1.1rem;
}

.button i {
    margin-right: 0.5rem;
    font-size: 1rem;
}

.application-note i {
    color: #ff6b6b;
    margin-right: 0.5rem;
    font-size: 1rem;
}

.menu-scroll-container {
    max-height: 660px;
    overflow-y: auto;
    padding-right: 0.5rem;
    padding-bottom: 1rem;
    position: relative;
    /* カスタムスクロールバー */
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent) var(--color-base);
}


/* Webkit系ブラウザ用のカスタムスクロールバー */
.menu-scroll-container::-webkit-scrollbar {
    width: 8px;
}

.menu-scroll-container::-webkit-scrollbar-track {
    background: var(--color-base);
    border-radius: 4px;
}

.menu-scroll-container::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.menu-scroll-container::-webkit-scrollbar-thumb:hover {
    background: var(--color-main);
}

.menu-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.menu-list li {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-base);
    transition: background-color 0.2s ease;
}

.menu-list li:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.menu-list li:hover {
    background-color: rgba(248, 248, 248, 0.8);
    padding: 1rem;
    margin: 0 -1rem 1.5rem -1rem;
    border-radius: 8px;
}

.menu-list h4 {
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.menu-list p {
    color: var(--color-sub);
    font-size: 0.95rem;
    line-height: 1.6;
}

.lesson-gallery {
    margin-bottom: 3rem;
}

.lesson-gallery h3 {
    text-align: center;
    color: var(--color-accent);
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1.5rem;
}

.gallery-grid figure {
    margin: 0;
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(75, 75, 75, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-grid figure:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(75, 75, 75, 0.2);
}

.gallery-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
}

.gallery-grid figcaption {
    text-align: center;
    margin-top: 0.75rem;
    font-size: 0.95rem;
    color: var(--color-sub);
    letter-spacing: 0.02em;
}

.lesson-application {
    text-align: center;
    background-color: var(--color-base);
    padding: 3rem 2rem;
    border-radius: 16px;
    border: 1px solid rgba(212, 163, 115, 0.2);
}

.lesson-application h3 {
    color: var(--color-accent);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.lesson-application > p {
    font-size: 1.1rem;
    color: var(--color-sub);
    margin-bottom: 2rem;
}

.application-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.application-note {
    font-size: 0.9rem;
    color: var(--color-sub);
    margin-top: 1.5rem;
    font-style: italic;
}

/* Footer */
.footer {
    background-color: var(--color-main);
    color: rgba(255, 255, 255, 0.85);
    padding: 2rem 1.5rem;
}

.footer__inner {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
}

.footer a {
    color: var(--color-accent);
    font-weight: 600;
}

.footer a:hover,
.footer a:focus {
    color: var(--color-white);
}

.footer p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .lesson-details-grid,
    .gallery-grid {
        gap: 1.5rem;
    }
    
    .lesson-detail-content {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .lesson-details-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .lesson-detail-content {
        padding: 1rem;
    }
    
    .application-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .menu-scroll-container {
        max-height: 500px;
    }
    
    .lesson-application {
        padding: 2rem 1rem;
    }
    
    .hero--lesson {
        padding: 4rem 1rem;
    }
    
    .lesson-info-card,
    .lesson-menu-card {
        padding: 1.5rem;
    }
}

@media (max-width: 640px) {
    .hero__content h1 {
        font-size: 2rem;
    }
    
    .lesson-description {
        font-size: 1rem;
    }
    
    .lesson-details-list li {
        font-size: 1rem;
        padding: 0.5rem 0;
    }
    
    .gallery-grid img {
        height: 150px;
    }
    
    .lesson-application {
        padding: 1.5rem 0.5rem;
    }
    
    .menu-scroll-container {
        max-height: 400px;
    }
    
    .menu-list li:hover {
        margin: 0 -0.5rem 1.5rem -0.5rem;
        padding: 0.5rem;
    }
}