/* ============================================================================
   STYLE_7.1.6.CSS — Literature page for "Anarchy" by Errico Malatesta
   Based on style_7.1.5.css, with responsive navigation fix.
   
   CHANGES FROM PREVIOUS VERSION:
   - Removed flex-direction: column override in @media(max-width: 40rem)
     that was forcing navigation links to stack vertically on mobile
   - Navigation links now remain side-by-side (horizontal) at all widths
   - Added justify-content: center and flex: 1 1 auto for graceful wrapping
   ========================================================================== */

/* ============================================================================
   ROOT & CUSTOM PROPERTIES
   ========================================================================== */
:root {
    /* Font stacks */
    --mono-font: ui-monospace, "SF Mono", "Cascadia Code", "Segoe UI Mono", "Roboto Mono", "Liberation Mono", "Noto Sans Mono", Menlo, monospace;
    --sans-font: ui-sans-serif, "SF Pro Text", "Segoe UI", "Open Sans", Roboto, "Liberation Sans", "Noto Sans", sans-serif;
    --serif-font: ui-serif, "New York", "Liberation Serif", "Noto Serif", "Roboto Slab", serif;

    /* Light theme (default fallback) */
    --bg-body: #f2f2f2;
    --color-body: #1a1a1a;
    --bg-strong: #f1f1f1;
    --color-strong: #000;
    --border-fullscreen: #000;
    --nav-link-bg: #3a3a3a;
    --nav-link-text: #fdfdfd;

    /* Reading-specific tokens */
    --reading-bg: #ffffff;
    --reading-text: #222;
    --accent: #900;
    --accent-hover: #b00;
    --quote-border: #900;
    --quote-bg: #faf5f5;
    --pre-bg: #eee;
    --pre-border: #ccc;
    --pre-text: #222;
    --section-divider: #ccc;
    --metadata-bg: #f5f5f5;

    /* Strong highlight customization */
    --strong-highlight-overlay: #6a6a6a;
    --strong-highlight-opacity: 0.3;

    /* Layout tokens */
    --max-reading-width: 42rem;
    --side-padding: 1.25rem;

    /* Safe area insets */
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);

    font-size: clamp(0.875rem, calc(0.875rem + ((1vw - 0.1rem) * 0.7328)), 1.5rem);
}

/* ── Dark Theme ─────────────────────────────────────────────────────── */
@media screen and (prefers-color-scheme: dark) {
    :root {
        --bg-body: #1a1a1a;
        --color-body: #e0e0e0;
        --bg-strong: #1f1f1f;
        --color-strong: #fdfdfd;
        --border-fullscreen: #fff;
        --nav-link-bg: #2a2a2a;
        --nav-link-text: #ffffff;
        --reading-bg: #262626;
        --reading-text: #ddd;
        --accent: #c44;
        --accent-hover: #d66;
        --quote-border: #c44;
        --quote-bg: #2a1f1f;
        --pre-bg: #1f1f1f;
        --pre-border: #444;
        --pre-text: #ddd;
        --section-divider: #444;
        --metadata-bg: #222;
        --strong-highlight-overlay: rgba(255, 255, 255, 0.15);
        --strong-highlight-opacity: 1;
    }
}

/* ============================================================================
   RESET & BASE
   ========================================================================== */
*,
*::after,
*::before {
    box-sizing: border-box;
}

html {
    overscroll-behavior: none;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
    scroll-padding-top: 2rem;
}

body {
    background: var(--bg-body);
    color: var(--color-body);
    font: 400 1.1rem/1.85 var(--serif-font);
    min-height: 100dvh;
    margin: 0;
    padding-top: var(--safe-area-top);
    padding-bottom: var(--safe-area-bottom);
}

/* ============================================================================
   SKIP LINK
   ========================================================================== */
.skip-link {
    position: absolute;
    top: -3rem;
    left: 0;
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1rem;
    font-family: var(--sans-font);
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 1000;
    transition: top 0.2s ease-in-out;
}
.skip-link:focus {
    top: 0;
}

/* ============================================================================
   TYPOGRAPHY
   ========================================================================== */
h1,
h2,
h3,
h4 {
    font-family: var(--sans-font);
    font-weight: 300;
    color: var(--color-strong);
}

h1 {
    font-size: clamp(1.5rem, calc(1rem + 3vmin), 2.8rem);
    margin: 3vmin 0 1vmin;
    line-height: 1.3;
}

h2 {
    font-size: clamp(1.3rem, calc(1rem + 2vmin), 2.2rem);
    margin: 4rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--section-divider);
}

h3 {
    font-size: calc(1rem + 1.5vmin);
    margin: 2.5rem 0 0.75rem;
}

p {
    margin: 0 0 1.2rem;
    text-align: left;
    hyphens: auto;
}

/* ============================================================================
   LINKS
   ========================================================================== */
a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}
a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ============================================================================
   MAIN NAVIGATION
   ========================================================================== */
nav[aria-label="Main navigation"] {
    margin: calc(var(--safe-area-top) + 1rem) 0 1.5rem;
    padding: 0 var(--side-padding);
    max-width: var(--max-reading-width);
    margin-inline: auto;
    font-family: var(--sans-font);
    font-size: 0.9rem;
    width: 100%;
}

nav[aria-label="Main navigation"] ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

nav[aria-label="Main navigation"] li {
    margin: 0;
}

/* .back-link button styling */
.back-link {
    display: inline-block;
    background: var(--nav-link-bg);
    color: var(--nav-link-text);

    border: none;
    outline: none;
    box-shadow: none;

    border-radius: 0.25rem;
    padding: 0.35rem 0.7rem;

    font: 500 0.9rem var(--sans-font);
    text-decoration: none;
    letter-spacing: 0.02em;

    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.1s ease;
}

.back-link:focus,
.back-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.back-link:hover {
    background: var(--accent);
    color: #ffffff;
    transform: translateY(-1px);
}

.back-link:active {
    transform: translateY(0);
}

.back-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Ensure strong inside back-link inherits link styles */
.back-link strong {
    color: inherit;
    background: transparent;
    font-weight: inherit;
}
.back-link strong::before {
    display: none;
}

/* ============================================================================
   STRONG (highlight effect from style_3 — preserved)
   ========================================================================== */
strong {
    background: var(--bg-strong);
    color: var(--color-strong);
    font-weight: 600;
    position: relative;
}

strong::before {
    background: var(--strong-highlight-overlay);
    opacity: var(--strong-highlight-opacity, 0.3);
    content: "";
    height: 102%;
    left: 0;
    padding: 0.15rem;
    position: absolute;
    top: 0;
    transform: skewX(1.65deg) rotate(-1.15deg);
    width: 102%;
    z-index: -1;
}

/* ============================================================================
   BREADCRUMB NAVIGATION
   ========================================================================== */
nav[aria-label="Breadcrumb"] {
    margin: calc(var(--safe-area-top) + 1rem) 0 2rem;
    padding: 0 var(--side-padding);
    max-width: var(--max-reading-width);
    margin-inline: auto;
    font-family: var(--sans-font);
    font-size: 0.9rem;
    width: 100%;
}

nav[aria-label="Breadcrumb"] a {
    /* Reset all button-like styling */
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;

    display: inline-block;
    background: var(--nav-link-bg);
    color: var(--nav-link-text);

    /* Remove all borders/outlines */
    border: none;
    outline: none;
    box-shadow: none;

    /* Shape and spacing */
    border-radius: 0.25rem;
    padding: 0.35rem 0.7rem;

    /* Typography */
    font: 500 0.9rem var(--sans-font);
    text-decoration: none;
    letter-spacing: 0.02em;

    /* Interactions */
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.1s ease;
}

nav[aria-label="Breadcrumb"] a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
nav[aria-label="Breadcrumb"] a:hover {
    background: var(--accent);
    color: #ffffff;
    transform: translateY(-1px);
}
nav[aria-label="Breadcrumb"] a:active {
    transform: translateY(0);
}
nav[aria-label="Breadcrumb"] a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Ensure strong inside breadcrumb link inherits link styles */
nav[aria-label="Breadcrumb"] a strong {
    color: inherit;
    background: transparent;
    font-weight: inherit;
}
nav[aria-label="Breadcrumb"] a strong::before {
    display: none;
}

/* ============================================================================
   BOOK HEADER
   ========================================================================== */
.book-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: var(--max-reading-width);
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--side-padding);
}

.series-credit {
    font-family: var(--sans-font);
    font-size: 0.85rem;
    color: var(--color-body);
    margin-bottom: 1rem;
    opacity: 0.85;
    text-align: center;
}

.gutenberg-license-summary {
    font-size: 0.85rem;
    color: var(--color-body);
    max-width: 36rem;
    margin: 1rem auto;
    text-align: justify;
    opacity: 0.85;
}

/* ── Bibliographic info (definition list) ──────────────────────────── */
.bibliographic-info {
    background: var(--metadata-bg);
    border-radius: 0.5rem;
    padding: 1rem 1.5rem;
    margin: 1.5rem auto;
    max-width: 36rem;
    font-family: var(--sans-font);
    font-size: 0.9rem;
    text-align: left;
}

.bibliographic-info dt {
    font-weight: 600;
    margin-top: 0.5rem;
}
.bibliographic-info dt:first-child {
    margin-top: 0;
}

.bibliographic-info dd {
    margin: 0 0 0.25rem;
}

.bibliographic-info abbr {
    text-decoration: none;
    cursor: help;
}

/* ── Title & Byline ────────────────────────────────────────────────── */
.book-header h1 {
    margin-top: 2rem;
    text-align: center;
}

.byline {
    font-family: var(--serif-font);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--color-body);
    margin: 0.5rem 0 0;
    text-align: center;
}

/* ============================================================================
   MAIN / READING AREA
   ========================================================================== */
main {
    max-width: var(--max-reading-width);
    margin: 0 auto;
    padding: 0 var(--side-padding);
}

article section {
    scroll-margin-top: 2rem;
}

/* ============================================================================
   TRANSCRIBER'S NOTE (aside)
   ========================================================================== */
.transcribers-note {
    background: var(--metadata-bg);
    border-radius: 0.5rem;
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    font-size: 0.9rem;
}

.transcribers-note h2 {
    font-size: 1.1rem;
    margin: 0 0 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--section-divider);
}

.transcribers-note p {
    margin-bottom: 0.5rem;
}
.transcribers-note p:last-child {
    margin-bottom: 0;
}

/* ============================================================================
   SECTION DIVIDERS (hr)
   ========================================================================== */
hr {
    border: none;
    border-top: 1px solid var(--section-divider);
    margin: 4rem auto;
    max-width: 50%;
}

/* ============================================================================
   BLOCKQUOTES
   ========================================================================== */
blockquote {
    border-left: 3px solid var(--quote-border);
    background: var(--quote-bg);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 0.4rem 0.4rem 0;
    font-style: italic;
}

blockquote p {
    margin-bottom: 0.5rem;
}
blockquote p:last-child {
    margin-bottom: 0;
}

blockquote cite {
    display: block;
    font-size: 0.9rem;
    font-style: normal;
    text-align: right;
    margin-top: 0.5rem;
    color: var(--color-body);
    opacity: 0.8;
}

/* ============================================================================
   EMPHASIS & INLINE ELEMENTS
   ========================================================================== */
em {
    font-style: italic;
}

cite {
    font-style: italic;
}

abbr {
    text-decoration: none;
    cursor: help;
}

/* ============================================================================
   LISTS (inside license details)
   ========================================================================== */
ul {
    padding-inline-start: 1.5rem;
}

ul li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

/* ============================================================================
   FOOTER (book footer with license details)
   ========================================================================== */
.book-footer {
    max-width: var(--max-reading-width);
    margin: 4rem auto 6rem;
    padding: 0 var(--side-padding);
    border-top: 1px solid var(--section-divider);
    padding-top: 2rem;
}

/* ============================================================================
   DETAILS / SUMMARY (License section)
   ========================================================================== */
details {
    background: var(--reading-bg);
    border: 1px solid var(--section-divider);
    border-radius: 0.5rem;
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
}

details summary {
    font-family: var(--sans-font);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    padding: 0.5rem 0;
    color: var(--accent);
}
details summary:hover {
    color: var(--accent-hover);
}

details[open] summary {
    border-bottom: 1px solid var(--section-divider);
    margin-bottom: 1rem;
}

details h3 {
    font-size: 1.1rem;
    margin-top: 2rem;
}
details h3:first-child {
    margin-top: 0;
}

/* ── License text container ─────────────────────────────────────────── */
.license-text p {
    font-family: var(--sans-font);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--color-body);
    margin-bottom: 0.75rem;
}

.license-text strong {
    display: inline-block;
}

/* ============================================================================
   UTILITIES
   ========================================================================== */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

/* ── Screen-reader-only ────────────────────────────────────────────── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================================================
   BACK TO TOP
   ========================================================================== */
.back-to-top {
    text-align: center;
    margin-top: 3rem;
}

.back-to-top a {
    font-family: var(--sans-font);
    font-size: 0.9rem;
    text-decoration: none;
}

/* ============================================================================
   RESPONSIVE ADJUSTMENTS
   ========================================================================== */
@media (max-width: 40rem) {
    :root {
        --side-padding: 1rem;
    }

    nav[aria-label="Main navigation"] ul {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }

    nav[aria-label="Main navigation"] a.back-link {
        flex: 1 1 auto;
        min-width: fit-content;
        text-align: center;
    }

    nav[aria-label="Breadcrumb"] a {
        font-size: 0.85rem;
        padding: 0.3rem 0.55rem;
    }

    .bibliographic-info {
        padding: 0.75rem 1rem;
    }

    .transcribers-note {
        padding: 0.75rem 1rem;
    }

    blockquote {
        padding: 0.75rem 1rem;
    }

    details {
        padding: 0.75rem 1rem;
    }

    hr {
        margin: 3rem auto;
    }
}

/* ============================================================================
   PRINT
   ========================================================================== */
@media print {
    .book-footer,
    .skip-link,
    nav[aria-label="Breadcrumb"],
    nav[aria-label="Main navigation"],
    .transcribers-note,
    .back-to-top {
        display: none;
    }

    main {
        max-width: none;
        padding: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        background: #fff;
        color: #000;
        padding-top: 0;
        padding-bottom: 0;
    }

    blockquote {
        border-left: 3px solid #999;
        background: none;
    }

    hr {
        border-top: 1px solid #999;
        max-width: 100%;
    }

    a {
        color: #000;
        text-decoration: underline;
    }

    strong {
        background: none;
        color: #000;
    }

    strong::before {
        display: none;
    }
}

/* ============================================================================
   ACCESSIBILITY — REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::after,
    *::before {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}