/* mujun.study — Dark Academia Scholarly Manuscript */

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

:root {
    --parchment: #f8f5ef;
    --parchment-dark: #e0d8c8;
    --tan: #c8c0b0;
    --text-dark: #1a1a1a;
    --text-body: #2a2a2a;
    --text-muted: #6a6a5a;
    --accent-red: #c84030;
    --sienna: #8a4a2a;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--parchment);
    color: var(--text-body);
    font-family: 'Crimson Pro', serif;
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    line-height: 1.85;
    overflow-x: hidden;
}

/* Title Page */
#title-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 24px;
    border-bottom: 1px solid var(--parchment-dark);
}

.title-ornament {
    color: var(--tan);
    font-size: 0.8rem;
    letter-spacing: 1em;
    margin: 16px 0;
}

.title-jp {
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.title-en {
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    font-weight: 400;
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.title-subtitle {
    font-family: 'Crimson Pro', serif;
    font-size: 0.95rem;
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 40px;
}

.title-meta {
    margin-top: 20px;
}

.title-author {
    font-family: 'Crimson Pro', serif;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-dark);
}

.title-year {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
    letter-spacing: 0.2em;
}

/* Table of Contents */
#table-of-contents {
    max-width: 500px;
    margin: 60px auto;
    padding: 40px 24px;
}

.toc-heading {
    font-family: 'Libre Baskerville', serif;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-dark);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.toc-entries {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toc-entry {
    display: flex;
    align-items: baseline;
    gap: 12px;
    cursor: pointer;
    transition: color 0.2s;
}

.toc-entry:hover {
    color: var(--accent-red);
}

.toc-chapter {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
    color: var(--text-muted);
    min-width: 24px;
}

.toc-title {
    font-family: 'Crimson Pro', serif;
    font-size: 1.05rem;
    font-weight: 400;
}

.toc-dots {
    flex: 1;
    border-bottom: 1px dotted var(--tan);
    margin-bottom: 4px;
    min-width: 20px;
}

.toc-page {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Manuscript Body */
#manuscript {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.chapter {
    display: grid;
    grid-template-columns: 20% 55% 25%;
    gap: 0;
    margin-bottom: 80px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--parchment-dark);
}

/* Margin Left: Annotations */
.margin-left {
    padding-right: 20px;
    padding-top: 80px;
}

.annotation {
    margin-bottom: 24px;
    position: relative;
    padding-right: 16px;
    border-right: 1px dashed var(--parchment-dark);
}

.annotation-text {
    font-family: 'Kalam', cursive;
    font-size: 0.78rem;
    font-weight: 300;
    color: var(--sienna);
    line-height: 1.5;
    display: block;
}

/* Body Column */
.body-column {
    padding: 0 24px;
}

.chapter-number {
    font-family: 'Crimson Pro', serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.chapter-title {
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

.body-text {
    margin-bottom: 20px;
    text-indent: 1.5em;
    color: var(--text-body);
}

.body-text:first-of-type {
    text-indent: 0;
}

.body-text em {
    font-style: italic;
    color: var(--text-dark);
}

.ref-marker {
    color: var(--accent-red);
    font-weight: 600;
    cursor: pointer;
    position: relative;
    margin-right: 2px;
}

/* Blockquote */
.manuscript-quote {
    margin: 32px 0;
    padding: 20px 24px;
    border-left: 3px solid var(--accent-red);
    background: rgba(232, 224, 208, 0.3);
}

.manuscript-quote p {
    font-family: 'Crimson Pro', serif;
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.manuscript-quote cite {
    font-family: 'Crimson Pro', serif;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: normal;
}

/* Formula Block */
.formula-block {
    text-align: center;
    margin: 32px 0;
    padding: 20px;
}

.formula {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    color: var(--text-dark);
    display: block;
    margin-bottom: 8px;
}

.formula-label {
    font-family: 'Crimson Pro', serif;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Margin Right: Footnotes */
.margin-right {
    padding-left: 20px;
    padding-top: 80px;
    border-left: 1px solid var(--parchment-dark);
}

.footnote {
    margin-bottom: 20px;
    display: flex;
    gap: 6px;
    align-items: flex-start;
}

.fn-number {
    font-family: 'Crimson Pro', serif;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-red);
    flex-shrink: 0;
    line-height: 1.6;
}

.fn-text {
    font-family: 'Crimson Pro', serif;
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.fn-text em {
    font-style: italic;
}

/* Colophon */
#colophon {
    text-align: center;
    padding: 60px 24px;
    border-top: 1px solid var(--parchment-dark);
    margin-top: 40px;
}

.colophon-ornament {
    color: var(--tan);
    font-size: 1rem;
    margin-bottom: 20px;
}

.colophon-text {
    font-family: 'Crimson Pro', serif;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.colophon-text.italic {
    font-style: italic;
    margin-top: 16px;
}

/* Chapter fade-in */
.chapter {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.chapter.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
    .chapter {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .margin-left, .margin-right {
        padding: 0 0 16px 0;
        border: none;
        border-bottom: 1px dashed var(--parchment-dark);
    }

    .margin-left {
        padding-top: 0;
        order: 2;
    }

    .body-column {
        padding: 0;
        order: 1;
    }

    .margin-right {
        padding-top: 0;
        order: 3;
        border-left: none;
    }

    .annotation {
        border-right: none;
        padding-right: 0;
    }
}