/* =====================================================
   Book Page Styles (Shared)
   Magazine-style editorial layout for long-form reading

   DESIGN PRINCIPLES (from DeepSelf home page):
   - Left-aligned content with --left-offset
   - Max-width constraints for readability
   - Restrained accent colors
   - Generous whitespace
   - No italics, Space Grotesk only

   SUPPORTED PAGES:
   - thesis.html (green theme)
   - manifesto.html (green theme)
   - inner-space.html (gold theme)
   - koyaanisqatsi.html (red theme)
   ===================================================== */

/* ===== PAGE-LEVEL ===== */
body.book-page {
    background-color: var(--black);
}

/* ===== BOOK HEADER ===== */
.book-header {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-xl) var(--left-offset);
    position: relative;
    overflow: hidden;
}

.book-header--scanlines::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.03) 2px,
        rgba(0, 0, 0, 0.03) 4px
    );
    pointer-events: none;
    z-index: 3;
}

.book-header__inner {
    max-width: 700px;
    width: 100%;
    position: relative;
    z-index: 2;
}

/* ===== BOOK BADGE ===== */
.book-badge {
    display: inline-block;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    padding: 0.4rem 0.8rem;
    margin-bottom: var(--spacing-md);
    border: 1px solid currentColor;
    background: transparent;
}

/* ===== BOOK TITLE ===== */
.book-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    color: var(--cream);
    line-height: 1.05;
    margin-bottom: var(--spacing-sm);
    letter-spacing: var(--letter-spacing-tight);
}

/* ===== BOOK SUBTITLE ===== */
.book-subtitle {
    font-size: var(--text-h3);
    font-weight: 400;
    color: var(--grey);
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
    max-width: 600px;
}

/* ===== BOOK INTRO ===== */
.book-intro {
    font-size: var(--text-body);
    color: var(--cream);
    opacity: 0.85;
    line-height: 1.7;
    max-width: 600px;
}

/* ===== HERO ELEMENTS (thesis/manifesto) ===== */
.hero-divider {
    width: 60px;
    height: 2px;
    background: var(--accent, var(--green));
    margin: var(--spacing-md) 0;
    opacity: 0.5;
}

.hero-symbols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
    max-width: 700px;
}

.hero-symbol {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--grey-dark);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.hero-symbol:hover {
    border-color: var(--accent, var(--green));
    background: rgba(var(--accent-rgb, 0, 245, 160), 0.03);
}

.hero-symbol__glyph {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--accent, var(--green));
    line-height: 1;
}

.hero-symbol__label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--grey);
}

.hero-thesis-statement {
    font-size: var(--text-body);
    line-height: 1.7;
    color: var(--cream);
    max-width: 600px;
    opacity: 0.85;
    margin-bottom: var(--spacing-md);
}

.hero-thesis-statement strong {
    color: var(--accent, var(--green));
    font-weight: 600;
}

.hero-metadata {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.hero-meta-item {
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--grey);
}

.hero-tagline {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent, var(--green));
    margin-top: var(--spacing-md);
}

/* ===== BOOK CONTENT CONTAINER ===== */
/* Handles both <main class="book-content"> and <article class="book-content"> */
.book-content,
main.book-content,
article.book-content {
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-xl) var(--left-offset);
}

/* ===== CHAPTERS ===== */
/* Handles both <section class="chapter"> and <article class="chapter"> */
.chapter,
section.chapter,
article.chapter {
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
}

/* ===== CHAPTER HEADER ===== */
/* Handles both <div class="chapter-header"> and <header class="chapter-header"> */
.chapter-header,
div.chapter-header,
header.chapter-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--grey-dark);
    max-width: 700px;
}

/* ===== CHAPTER NUMBER ===== */
/* Handles both <div class="chapter-number"> and <p class="chapter-number"> */
.chapter-number {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent, var(--green));
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
}

/* ===== CHAPTER TITLE ===== */
.chapter-title {
    font-size: var(--text-h1);
    font-weight: 700;
    color: var(--cream);
    line-height: 1.2;
}

/* ===== CHAPTER SUBTITLE ===== */
.chapter-subtitle {
    font-size: var(--text-body-lg);
    font-weight: 400;
    color: var(--accent, var(--green));
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

/* ===== CHAPTER INTRO BLOCK ===== */
.chapter-intro {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--grey-dark);
    border-left: 3px solid var(--accent, var(--green));
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
}

.chapter-intro__label {
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent, var(--green));
    margin-bottom: var(--spacing-xs);
}

.chapter-intro__title {
    font-size: var(--text-h3);
    font-weight: 600;
    color: var(--cream);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.chapter-intro__text {
    font-size: var(--text-body);
    color: var(--cream);
    opacity: 0.85;
    line-height: 1.7;
    margin: 0;
}

/* ===== CHAPTER BODY - MAGAZINE READING ===== */
.chapter-body {
    font-size: var(--text-body);
    line-height: 1.8;
    color: var(--cream);
    max-width: 650px;
}

.chapter-body p {
    margin-bottom: 1.5em;
    opacity: 0.9;
}

.chapter-body p:last-child {
    margin-bottom: 0;
}

.chapter-body strong {
    font-weight: 600;
    color: var(--cream);
    opacity: 1;
}

.chapter-body h3 {
    font-size: var(--text-h3);
    font-weight: 600;
    color: var(--cream);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

/* ===== SECTION WRAPPER (thesis pattern) ===== */
.section {
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    font-size: var(--text-h3);
    font-weight: 600;
    color: var(--cream);
    margin-bottom: var(--spacing-md);
    max-width: 650px;
}

/* ===== PULLQUOTE - MAGAZINE BREAKOUT ===== */
.pullquote {
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    max-width: 700px;
    border-left: 3px solid var(--accent, var(--green));
    background: rgba(var(--accent-rgb, 0, 245, 160), 0.03);
}

.pullquote p {
    font-size: var(--text-h3);
    font-weight: 500;
    color: var(--cream);
    line-height: 1.5;
    margin: 0;
    opacity: 1;
}

.pullquote--green {
    border-left-color: var(--green);
    background: rgba(0, 245, 160, 0.03);
}

.pullquote--green p {
    color: var(--green);
}

/* ===== SECTION BREAK ===== */
.section-break {
    text-align: center;
    padding: var(--spacing-lg) 0;
    font-size: 1.25rem;
    letter-spacing: 0.3em;
    opacity: 0.3;
    color: var(--accent, var(--green));
}

/* ===== KEY TERMS ===== */
.key-term {
    color: var(--accent, var(--green));
    font-weight: 600;
}

/* ===== STAT HIGHLIGHT ===== */
.stat-highlight {
    font-weight: 600;
    color: var(--accent, var(--green));
}

/* ===== DEFINITION BLOCK ===== */
.definition {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--grey-dark);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    max-width: 650px;
}

.definition__term {
    font-size: var(--text-h3);
    font-weight: 600;
    color: var(--accent, var(--gold));
    margin-bottom: var(--spacing-sm);
}

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

.definition__meaning {
    font-size: var(--text-body);
    color: var(--cream);
    opacity: 0.85;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--grey-dark);
    line-height: 1.6;
}

.definition__meaning:last-child {
    border-bottom: none;
}

/* ===== SPECIAL WORD (koyaanisqatsi) ===== */
.special-word,
.hopi-word {
    display: block;
    font-size: clamp(1.25rem, 3vw, 2rem);
    font-weight: 300;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin: var(--spacing-md) 0;
    opacity: 0.8;
    color: var(--accent, var(--gold));
}

/* ===== CARD GRIDS ===== */
.pole-grid,
.concept-cards,
.component-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
    max-width: 800px;
}

/* ===== CARDS (pole, concept, component) ===== */
.pole-card,
.concept-card,
.component-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--grey-dark);
    padding: var(--spacing-md);
    transition: border-color var(--transition-fast);
}

.pole-card:hover,
.concept-card:hover,
.component-card:hover {
    border-color: var(--accent, var(--green));
}

.pole-card__icon,
.concept-card__icon,
.component-card__icon {
    font-size: var(--text-h2);
    font-weight: 700;
    color: var(--accent, var(--green));
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.pole-card__label,
.concept-card__label,
.component-card__label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--grey);
    margin-bottom: var(--spacing-xs);
}

.pole-card__title,
.concept-card__title,
.component-card__title {
    font-size: var(--text-body);
    font-weight: 600;
    color: var(--cream);
    margin-bottom: var(--spacing-xs);
}

.pole-card__text,
.concept-card__text,
.component-card__text {
    font-size: var(--text-sm);
    color: var(--cream);
    opacity: 0.75;
    line-height: 1.6;
    margin: 0;
}

/* ===== TABLES ===== */
.chapter-body table {
    width: 100%;
    max-width: 650px;
    margin: var(--spacing-lg) 0;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.chapter-body th,
.chapter-body td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--grey-dark);
    line-height: 1.5;
}

.chapter-body th {
    font-weight: 600;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: var(--text-xs);
}

/* ===== LISTS ===== */
.chapter-body ul,
.chapter-body ol {
    margin: var(--spacing-md) 0;
    padding-left: 1.5em;
    max-width: 650px;
}

.chapter-body li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.chapter-body ol {
    list-style: none;
    counter-reset: item;
    padding-left: 0;
}

.chapter-body ol li {
    counter-increment: item;
    padding-left: 2rem;
    position: relative;
}

.chapter-body ol li::before {
    content: counter(item);
    position: absolute;
    left: 0;
    font-weight: 600;
    color: var(--accent, var(--green));
    opacity: 0.7;
}

/* ===== BOOK CTA ===== */
.book-cta {
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-xl) var(--left-offset);
    background: var(--charcoal);
    border-top: 1px solid var(--grey-dark);
}

.book-cta__title {
    font-size: var(--text-h2);
    font-weight: 700;
    color: var(--cream);
    margin-bottom: var(--spacing-sm);
}

.book-cta__text {
    font-size: var(--text-body);
    color: var(--grey);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    line-height: 1.7;
}

.book-cta__button {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent, var(--green));
    color: var(--black);
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.book-cta__button:hover {
    background: var(--cream);
    color: var(--black);
}

/* ===== BOOK NAV ===== */
.book-nav {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--left-offset);
    border-top: 1px solid var(--grey-dark);
    background: var(--charcoal);
}

.book-nav__inner {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.book-nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--accent, var(--green));
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.book-nav-link:hover {
    opacity: 1;
}

/* ===== CHAPTER NAV (thesis) ===== */
.chapter-nav {
    background: var(--charcoal);
    border-bottom: 1px solid var(--grey-dark);
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) var(--left-offset);
    position: sticky;
    top: var(--header-height);
    z-index: 100;
}

.chapter-nav__inner {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    max-width: var(--max-width);
}

.chapter-nav__link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--accent, var(--green));
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.chapter-nav__link:hover {
    opacity: 1;
}

/* ===== BOOK FOOTER ===== */
.book-footer {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-lg) var(--left-offset);
    border-top: 1px solid var(--grey-dark);
    background: var(--black);
}

.footer-logo {
    height: 24px;
    opacity: 0.8;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent, var(--green));
}

/* ===== REFERENCES LIST ===== */
.references-list p {
    font-size: var(--text-sm);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    text-indent: calc(-1 * var(--spacing-md));
    opacity: 0.8;
}

/* ===== SELECTION ===== */
::selection {
    background: var(--accent, var(--green));
    color: var(--black);
}

/* =====================================================
   RESPONSIVE BREAKPOINTS
   ===================================================== */

/* ===== LARGE DESKTOP (1200px+) ===== */
@media (min-width: 1200px) {
    .book-header__inner {
        max-width: 750px;
    }

    .chapter {
        max-width: 850px;
    }

    .chapter-header {
        max-width: 750px;
    }

    .chapter-body {
        font-size: 1.0625rem; /* 17px */
    }

    .pullquote {
        max-width: 750px;
    }

    .chapter-intro {
        max-width: 750px;
    }
}

/* ===== TABLET (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .hero-symbols {
        gap: var(--spacing-xs);
    }

    .pole-grid,
    .concept-cards,
    .component-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== MOBILE (< 768px) ===== */
@media (max-width: 768px) {
    .book-header {
        min-height: auto;
        padding: var(--spacing-lg) var(--margin-page);
    }

    .book-content,
    main.book-content,
    article.book-content {
        padding: var(--spacing-lg) var(--margin-page);
    }

    .chapter {
        max-width: 100%;
    }

    .chapter-header {
        max-width: 100%;
    }

    .chapter-body {
        max-width: 100%;
        font-size: var(--text-body);
    }

    .hero-symbols {
        grid-template-columns: 1fr;
    }

    .pole-grid,
    .concept-cards,
    .component-grid {
        grid-template-columns: 1fr;
    }

    .pullquote {
        padding: var(--spacing-md);
        margin-left: calc(-1 * var(--margin-page));
        margin-right: calc(-1 * var(--margin-page));
        padding-left: var(--margin-page);
        padding-right: var(--margin-page);
        max-width: none;
    }

    .hero-metadata {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .chapter-nav {
        padding-left: var(--margin-page);
        overflow-x: auto;
    }

    .chapter-nav__inner {
        gap: var(--spacing-sm);
        flex-wrap: nowrap;
    }

    .book-cta {
        padding: var(--spacing-lg) var(--margin-page);
    }

    .book-nav {
        padding-left: var(--margin-page);
    }

    .book-footer {
        padding: var(--spacing-lg) var(--margin-page);
    }
}

/* ===== SMALL MOBILE (< 480px) ===== */
@media (max-width: 480px) {
    .book-title {
        font-size: clamp(2rem, 10vw, 2.5rem);
    }

    .hero-symbol {
        padding: var(--spacing-sm);
    }

    .hero-symbol__glyph {
        font-size: var(--text-h2);
    }

    .chapter-intro {
        padding: var(--spacing-sm);
    }

    .pole-card,
    .concept-card,
    .component-card {
        padding: var(--spacing-sm);
    }
}

/* ===== PRINT ===== */
@media print {
    .book-header {
        min-height: auto;
        padding: 2rem;
    }

    .chapter-body {
        font-size: 11pt;
        line-height: 1.6;
        max-width: 100%;
    }

    .pullquote {
        page-break-inside: avoid;
    }

    .chapter {
        page-break-after: always;
    }

    .chapter-nav,
    .book-nav {
        display: none;
    }
}