/* =====================================================
   MUSEUM EDITORIAL DESIGN SYSTEM
   Typography + palette for USA Symbol encyclopedia
   ===================================================== */

:root {
    /* ── Museum Palette ───────────────────────────────── */
    --navy:          #1B2A4A;    /* Deep Navy — headers, hero, UI */
    --navy-light:    #2C3E6B;    /* Lighter navy for hover states */
    --cream:         #F8F4ED;    /* Parchment — article backgrounds */
    --cream-dark:    #EDE8DF;    /* Slightly deeper cream for borders */
    --gold:          #C09B4F;    /* Muted Gold — accent, timeline, active */
    --gold-border:   rgba(192, 155, 79, 0.35);
    --gold-muted:    rgba(192, 155, 79, 0.12);
    --ink:           #1A1A2E;    /* Near-black for body text */
    --slate-ed:      #6B7D8A;    /* Slate grey for labels, muted text */
    --white:         #FFFFFF;

    /* ── 8px Spacing Scale ────────────────────────────── */
    --sp-1: 0.5rem;   /* 8px  */
    --sp-2: 1rem;     /* 16px */
    --sp-3: 1.5rem;   /* 24px */
    --sp-4: 2rem;     /* 32px */
    --sp-6: 3rem;     /* 48px */
    --sp-8: 4rem;     /* 64px */
    --sp-12: 6rem;    /* 96px */

    /* ── Heritage Font Stack ──────────────────────────── */
    --font-article:  "Libre Baskerville", Georgia, Cambria, "Times New Roman", serif;
    --font-ui:       "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Legacy aliases (keep existing references working) */
    --ui-color:      var(--ink);
    --article-color: var(--ink);
    --link-color:    #2563eb;
    --link-hover:    #1e40af;
}

/* =====================================================
   BASE & RESET
   ===================================================== */

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

body {
    font-family: var(--font-ui);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* UI elements use sans-serif (Manrope/Inter) */
button, input, select, textarea,
nav, header, footer,
.toc, .sidebar, .card,
table, th, td {
    font-family: var(--font-ui);
}

/* UI headings stay sans-serif (content headings use .content-h2/.content-h3) */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-ui);
}

/* =====================================================
   ARTICLE TYPOGRAPHY
   Applies to sections with prose content
   ===================================================== */

.site-content section p {
    color: var(--article-color);
    font-family: var(--font-article);
    font-size: 19px;
    font-weight: 400;
    line-height: 34px;
    letter-spacing: 0.19px;
    margin: 0;
}

/* Paragraph spacing */
.site-content section p + p {
    margin-top: 1.25rem;
}

/* Lead paragraph — same size as body text per design spec */
.site-content section > p:first-of-type,
.site-content section .max-w-prose > p:first-of-type {
    font-size: 19px;
    line-height: 34px;
    color: #2d2d2d;
}

/* =====================================================
   HEADINGS
   ===================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-ui);
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}

h1 { font-size: 2.5rem;  font-weight: 800; }
h2 { font-size: 41px; font-weight: 700; color: #161B26; line-height: 50px; letter-spacing: -0.02em; margin-top: 2rem; margin-bottom: 1rem; }
h3 { font-size: 23px; font-weight: 700; line-height: 50px; margin-top: 1.5rem; margin-bottom: 0.625rem; }

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 26px; line-height: 37px; letter-spacing: -0.405px; }
    h3 { font-size: 19px; line-height: 24px; letter-spacing: 0.38px; }
    .site-content section p { font-size: 18px; line-height: 29px; letter-spacing: 0.18px; }
    .site-content section > p:first-of-type,
    .site-content section .max-w-prose > p:first-of-type { font-size: 18px; line-height: 29px; }
}

/* =====================================================
   LISTS (inside prose sections)
   ===================================================== */

.site-content section ul,
.site-content section ol {
    font-family: var(--font-article);
    color: var(--article-color);
    font-size: 1rem;
    line-height: 1.75;
    margin: 1.25rem 0;
}

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

.site-content section ul.list-none {
    list-style: none;
    padding-left: 0;
}

/* =====================================================
   BLOCKQUOTES
   ===================================================== */

.site-content section blockquote {
    font-family: var(--font-article);
    font-size: 1.125rem;
    line-height: 1.75;
    font-style: italic;
    color: #4b5563;
    margin: 2rem 0;
    padding-left: 1.5rem;
    border-left: 3px solid var(--gold);
}

/* =====================================================
   EDITORIAL HERO COMPONENT
   Full-bleed dark navy header
   ===================================================== */

.editorial-hero {
    background-color: var(--navy);
    position: relative;
    overflow: hidden;
}

/* Subtle dot-grid texture */
.editorial-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 28px 28px;
    pointer-events: none;
}

/* Bottom fade into page background */
.editorial-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to bottom, transparent, rgba(27,42,74,0.6));
    pointer-events: none;
}

/* Category pill inside hero */
.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    border-radius: 9999px;
    border: 1px solid var(--gold-border);
    background: var(--gold-muted);
    color: #E2BE7A;
    font-family: var(--font-ui);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

/* Hero H1 — uses serif for gravitas */
.hero-title {
    font-family: var(--font-article);
    color: var(--cream);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

/* Hero subtitle (scientific name, action type, etc.) */
.hero-subtitle {
    font-family: var(--font-article);
    color: rgba(248, 244, 237, 0.6);
    font-style: italic;
    line-height: 1.5;
}

/* =====================================================
   QUICK FACTS BAR (horizontal strip inside hero)
   ===================================================== */

.facts-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 0.875rem;
    overflow: hidden;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.facts-bar__cell {
    flex: 1 1 110px;
    padding: 0.875rem 1.25rem;
    text-align: center;
    border-right: 1px solid rgba(255,255,255,0.08);
    font-family: var(--font-ui);
}

.facts-bar__cell:last-child {
    border-right: none;
}

.facts-bar__value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cream);
    line-height: 1.2;
}

.facts-bar__label {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(255,255,255,0.4);
    margin-top: 3px;
}

/* =====================================================
   READING PROGRESS BAR
   ===================================================== */

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background-color: var(--gold);
    z-index: 9999;
    width: 0%;
    transition: width 80ms linear;
    will-change: width;
}

/* =====================================================
   EDITORIAL TOC SIDEBAR
   Minimalist strip with progress line
   ===================================================== */

.toc-editorial {
    position: relative;
    padding-left: 1rem;
}

.toc-editorial__track {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: rgba(107, 125, 138, 0.2);
}

.toc-editorial__progress {
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    background-color: var(--gold);
    height: 0%;
    transition: height 120ms ease-out;
    margin-left: -0.5px;
}

.toc-editorial__heading {
    font-family: var(--font-ui);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--slate-ed);
    margin-bottom: 0.75rem;
}

.toc-link {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.3rem 0;
    font-family: var(--font-ui);
    font-size: 0.875rem; /* 14px — consistent across desktop and mobile */
    line-height: 1.4;
    color: rgba(107, 125, 138, 0.8);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color 0.15s ease;
}

.toc-link:hover {
    color: var(--navy);
}

/* Active state — overrides JS-injected classes */
.toc-link.toc-active,
.toc-link[aria-current="true"] {
    color: var(--navy) !important;
    font-weight: 600;
    background: transparent !important;
    border-left-color: var(--gold) !important;
    padding-left: 0.5rem;
}

.toc-link.toc-active span,
.toc-link.toc-active i,
.toc-link[aria-current="true"] span,
.toc-link[aria-current="true"] i {
    color: var(--navy) !important;
}

/* =====================================================
   SECTION HEADERS (in _FirearmSections)
   ===================================================== */

.section-label {
    font-family: var(--font-ui);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--gold);
}

/* =====================================================
   LINKS (prose content only)
   ===================================================== */

/* =====================================================
   OPTIMAL READING WIDTH
   ===================================================== */

.max-w-prose {
    max-width: 65ch;
}

/* =====================================================
   SUBSECTION DIVIDERS
   ===================================================== */

.subsection-divider {
    margin: 30px auto 0 0;
    width: 100%;
    max-width: 600px;
    padding: 30px 0;
    border-top: 1px solid rgba(2, 7, 20, 0.15);
}

.subsection-divider:first-of-type {
    border-top: none;
    padding-top: 0;
}

/* =====================================================
   STICKY SIDEBAR
   ===================================================== */

@media (min-width: 1024px) {
    .sticky-sidebar {
        position: sticky;
        top: 6rem;
        align-self: flex-start;
    }
}

/* =====================================================
   MOBILE OPTIMIZATIONS
   ===================================================== */

@media (max-width: 640px) {
    button,
    a.btn,
    .toc-mobile-link {
        min-height: 44px;
        min-width: 44px;
    }

    .site-content article {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* =====================================================
   CONTENT TYPOGRAPHY UTILITIES
   Single source of truth — use these classes instead of
   hardcoding Tailwind font sizes on every page.
   ===================================================== */

/* Serif headings like Audubon — Libre Baskerville for content sections */
.content-h2 {
    font-family: var(--font-article); /* Libre Baskerville */
    font-size: 41px;
    font-weight: 700;
    color: #161B26;
    line-height: 50px;
    letter-spacing: -0.02em;
    margin-top: 0;
    margin-bottom: 0;
}

.content-h3 {
    font-family: var(--font-article); /* Libre Baskerville */
    font-size: 23px;
    font-weight: 700;
    line-height: 50px;
    letter-spacing: 0;
    margin-top: 0;
    margin-bottom: 0;
}

.content-p {
    font-size: 19px;
    font-style: normal;
    font-weight: 400;
    line-height: 34px;
    letter-spacing: 0.19px;
}

@media (max-width: 768px) {
    .content-h2 {
        font-size: 26px;
        line-height: 37px;
        letter-spacing: -0.405px;
    }
    .content-h3 {
        font-size: 19px;
        line-height: 24px;
        letter-spacing: 0.38px;
    }
    .content-p {
        font-size: 18px;
        line-height: 29px;
        letter-spacing: 0.18px;
    }
}

/* TOC link consistent size across all contexts */
.toc-link {
    font-size: 0.875rem; /* 14px everywhere */
}

/* =====================================================
   PRINT STYLES
   ===================================================== */

@media print {
    .no-print, nav, aside, button, .toc, .share-buttons { display: none !important; }
    .site-content section p { font-size: 12pt; line-height: 1.5; }
    h1, h2, h3 { page-break-after: avoid; }
    img { max-width: 100%; page-break-inside: avoid; }
}