/* 
    Wafu Scroll Theme (Makimono Style)
    Used for interactive tutorials 
*/

:root {
    --wafu-bg: #f9f5ed;           /* 和紙のような柔らかな背景 */
    --wafu-paper: #ffffff;        /* コンテンツの紙色 */
    --wafu-sumi: #2b2b2b;         /* 墨色（文字色） */
    --wafu-ai: #103374;           /* 藍色（アクセント） */
    --wafu-shu: #c93a40;          /* 朱色（アクセント・注意） */
    --wafu-kin: #d3b16e;          /* 金色（装飾） */
    --wafu-border: #e2d9c3;       /* ボーダーや区切りの色 */
}

body {
    font-family: 'Inter', 'Noto Serif JP', serif;
    background-color: var(--wafu-bg);
    color: var(--wafu-sumi);
    margin: 0;
    padding: 0;
    overflow: hidden; /* 横スクロールベースなので縦スクロールを隠す */
}

h1, h2, h3, h4, h5 {
    font-family: 'Shippori Mincho', serif;
}

/* Scroll Container (Makimono) */
.makimono-container {
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    width: 100vw;
    height: 100vh;
    /* 背景に和紙っぽいテクスチャをつけるならここで */
}

/* Custom Scrollbar for the horizontal scroll */
.makimono-container::-webkit-scrollbar {
    height: 8px;
}
.makimono-container::-webkit-scrollbar-track {
    background: var(--wafu-bg);
}
.makimono-container::-webkit-scrollbar-thumb {
    background: var(--wafu-border);
    border-radius: 4px;
}

/* Individual Page/Section */
.makimono-page {
    /* 1画面にぴったり収める */
    scroll-snap-align: start;
    flex: 0 0 100vw;
    height: 100vh;
    padding: 2rem;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    border-right: 1px solid var(--wafu-border); /* 巻物の継ぎ目 */
}

/* Content Area inside the page */
.page-content {
    background: var(--wafu-paper);
    width: 100%;
    max-width: 900px;
    height: 85vh;
    padding: 3rem 4rem;
    box-shadow: 0 10px 40px -10px rgba(0,0,0,0.05);
    border-radius: 4px;
    overflow-y: auto; /* コンテンツが長い場合は縦スクロール可能に */
    position: relative;
    box-sizing: border-box;
    /* 巻物の芯のような装飾 */
    border-left: 4px solid var(--wafu-kin);
}

.page-content::-webkit-scrollbar {
    width: 6px;
}
.page-content::-webkit-scrollbar-thumb {
    background: var(--wafu-border);
    border-radius: 3px;
}

/* Section Title Decoration */
.makimono-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px dashed var(--wafu-border);
    position: relative;
    display: inline-block;
}

.makimono-title::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--wafu-shu);
}

/* Navigation Controls (Floating) */
.nav-controls {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
    z-index: 50;
}

.nav-btn {
    background: var(--wafu-paper);
    color: var(--wafu-sumi);
    border: 1px solid var(--wafu-border);
    padding: 0.75rem 2rem;
    border-radius: 30px;
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.nav-btn:hover {
    background: var(--wafu-ai);
    color: white;
    border-color: var(--wafu-ai);
    transform: translateY(-2px);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--wafu-bg);
    color: var(--wafu-sumi);
    border-color: transparent;
    box-shadow: none;
    transform: none;
}

/* Markdown-like Content Styling inside page */
.page-content p {
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: #4a5568;
}

.page-content pre {
    background: #1a202c;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
    border: 1px solid #2d3748;
}

.page-content code {
    background: #edf2f7;
    color: var(--wafu-shu);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.9em;
}

.page-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.page-content ul, .page-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: #4a5568;
    line-height: 1.8;
}

.page-content li {
    margin-bottom: 0.5rem;
}

/* Home Link */
.home-link {
    position: absolute;
    top: 2rem;
    left: 2rem;
    color: var(--wafu-ai);
    text-decoration: none;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    font-weight: bold;
    z-index: 100;
    background: rgba(255,255,255,0.8);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.home-link:hover {
    background: var(--wafu-ai);
    color: white;
}

/* Page Indicator */
.page-indicator {
    position: fixed;
    top: 2rem;
    right: 2rem;
    font-family: 'Shippori Mincho', serif;
    font-size: 1.2rem;
    color: var(--wafu-sumi);
    letter-spacing: 0.2em;
    z-index: 100;
    opacity: 0.5;
    writing-mode: vertical-rl;
}