/* ============================================
   STATSWING — Shared Styles
   Font faces, design tokens, reset, navigation,
   and publication component styles.
   ============================================ */

/* Font Faces */
@font-face { font-family: 'Outfit'; src: url('/assets/fonts/Outfit-Light.woff2') format('woff2'); font-weight: 300; font-style: normal; font-display: swap; }
@font-face { font-family: 'Outfit'; src: url('/assets/fonts/Outfit-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Outfit'; src: url('/assets/fonts/Outfit-Medium.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: 'Outfit'; src: url('/assets/fonts/Outfit-SemiBold.woff2') format('woff2'); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: 'Source Serif 4'; src: url('/assets/fonts/SourceSerif4-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Source Serif 4'; src: url('/assets/fonts/SourceSerif4-Medium.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: 'Source Serif 4'; src: url('/assets/fonts/SourceSerif4-SemiBold.woff2') format('woff2'); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: 'Source Serif 4'; src: url('/assets/fonts/SourceSerif4-Italic.woff2') format('woff2'); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('/assets/fonts/IBMPlexMono-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('/assets/fonts/IBMPlexMono-Medium.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }

/* Design Tokens */
:root {
    --navy: #1B2A4A;
    --navy-light: #2C3E5F;
    --gold: #C4A265;
    --gold-muted: #B89B5E;
    --gold-light: rgba(196, 162, 101, 0.10);
    --parchment: #F5F1EA;
    --parchment-dark: #EBE6DC;
    --parchment-deep: #E0D9CE;
    --white: #FDFCF9;
    --text-primary: #1B2A4A;
    --text-secondary: #4A5568;
    --text-muted: #7A8599;
    --data-positive: #1A7DB6;
    --data-negative: #9B2335;
    --data-caution: #C4A265;
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Source Serif 4', Georgia, serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

/* Reset & Base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--text-primary); background: var(--parchment); }
a { transition: color 150ms ease; }
::selection { background: var(--gold-light); color: var(--navy); }

/* Brand Bar */
.brand-bar, .top-bar { height: 3px; background: var(--gold); position: fixed; top: 0; left: 0; right: 0; z-index: 100; }

/* Site Navigation */
.site-nav {
    position: fixed; top: 3px; left: 0; right: 0; z-index: 99;
    padding: 12px 32px;
    display: flex; justify-content: space-between; align-items: center;
    background: rgba(245,241,234,0.92);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(224,217,206,0.5);
}
.nav-wm {
    font-family: var(--font-display); font-weight: 400; font-size: 0.5625rem;
    letter-spacing: 0.32em; color: var(--text-muted); text-transform: uppercase; text-decoration: none;
}
.nav-links { display: flex; gap: 24px; }
.nav-links a {
    font-family: var(--font-display); font-weight: 400; font-size: 0.625rem;
    letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-muted);
    text-decoration: none; transition: color 0.2s;
}
.nav-links a:hover { color: var(--navy); }
.nav-links a.nav-active { color: var(--gold-muted); }

/* ============================================
   Publication Page Components
   Shared across all research publication pages.
   ============================================ */

/* Publication Header */
.pub-header { padding: 96px 0 48px; border-bottom: 1px solid var(--parchment-deep); }
.pub-masthead { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 48px; }
.pub-wm { font-family: var(--font-display); font-weight: 400; font-size: 0.6875rem; letter-spacing: 0.35em; color: var(--text-muted); text-transform: uppercase; }
.pub-series { font-family: var(--font-display); font-weight: 400; font-size: 0.6875rem; letter-spacing: 0.18em; color: var(--gold-muted); text-transform: uppercase; }
.pub-title { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.5rem, 3.5vw, 2rem); color: var(--navy); line-height: 1.25; letter-spacing: 0.01em; margin-bottom: 16px; max-width: 580px; }
.pub-subtitle { font-family: var(--font-body); font-size: 1.0625rem; color: var(--text-secondary); line-height: 1.65; font-style: italic; max-width: 540px; margin-bottom: 24px; }
.pub-meta { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-muted); line-height: 1.8; }
.pub-meta a { color: var(--gold-muted); text-decoration: none; }
.pub-meta .pdf-link { display: inline-block; margin-top: 6px; font-size: 0.625rem; letter-spacing: 0.08em; color: var(--navy); opacity: 0.6; transition: opacity 0.2s; }
.pub-meta .pdf-link:hover { opacity: 1; }

/* Key Finding */
.key-finding { padding: 40px 0; border-bottom: 1px solid var(--parchment-deep); }
.kf-label { font-family: var(--font-display); font-weight: 500; font-size: 0.5625rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--gold-muted); margin-bottom: 12px; }
.kf-text { font-family: var(--font-body); font-size: 1.0625rem; line-height: 1.75; color: var(--text-primary); border-left: 3px solid var(--gold); padding-left: 20px; max-width: 560px; }

/* Publication Body */
.pub-body { padding: 48px 0; }
.pub-body h2 { font-family: var(--font-display); font-weight: 600; font-size: 1.1875rem; color: var(--navy); letter-spacing: 0.02em; margin: 40px 0 16px; padding-top: 8px; }
.pub-body h2:first-child { margin-top: 0; }
.pub-body h3 { font-family: var(--font-display); font-weight: 500; font-size: 0.9375rem; color: var(--navy); letter-spacing: 0.02em; margin: 28px 0 12px; }
.pub-body p { font-size: 1.0625rem; line-height: 1.8; color: var(--text-primary); margin-bottom: 20px; }
.pub-body p .data { font-family: var(--font-mono); font-size: 0.9375rem; font-weight: 500; color: var(--navy); }
.pub-body .term { font-family: var(--font-display); font-weight: 500; color: var(--navy); }
.pub-body blockquote { border-left: 3px solid var(--gold); padding: 12px 20px; margin: 24px 0; background: var(--gold-light); }
.pub-body blockquote p { font-size: 0.9375rem; font-weight: 500; color: var(--text-primary); margin-bottom: 0; }
.pub-body .ext-quote { border-left: 3px solid var(--parchment-deep); padding: 12px 20px; margin: 24px 0; background: var(--white); }
.pub-body .ext-quote p { font-size: 0.9375rem; color: var(--text-secondary); margin-bottom: 0; font-style: italic; }
.pub-body .ext-quote .quote-attr { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-muted); margin-top: 8px; font-style: normal; }

/* Tables */
.pub-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.pub-table th { text-align: left; padding: 8px 12px; border-bottom: 2px solid var(--navy); font-family: var(--font-display); font-weight: 500; font-size: 0.6875rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }
.pub-table td { padding: 8px 12px; border-bottom: 1px solid var(--parchment-deep); font-family: var(--font-mono); font-size: 0.8125rem; color: var(--text-secondary); }
.pub-table td:first-child { font-weight: 500; color: var(--navy); }

/* Figures */
.pub-figure { margin: 32px 0; }
.pub-figure svg { width: 100%; height: auto; display: block; }
.pub-figure-caption { margin-top: 8px; font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-muted); line-height: 1.5; }

/* Methodology Aside */
.methodology-aside { background: var(--white); border: 1px solid var(--parchment-dark); padding: 20px 24px; margin: 28px 0; }
.methodology-aside .aside-label { font-family: var(--font-display); font-weight: 500; font-size: 0.5625rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 8px; }
.methodology-aside p { font-size: 0.875rem; line-height: 1.7; color: var(--text-secondary); margin-bottom: 0; }
.methodology-aside p + p { margin-top: 12px; }

/* Tags */
.pub-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0; }
.pub-tag { display: inline-block; background: var(--gold-light); border: 1px solid var(--gold); padding: 4px 12px; font-family: var(--font-display); font-weight: 500; font-size: 0.625rem; letter-spacing: 0.08em; color: var(--navy); text-transform: uppercase; }

/* Implications */
.implications { padding: 40px 0; border-top: 1px solid var(--parchment-deep); border-bottom: 1px solid var(--parchment-deep); }
.impl-label { font-family: var(--font-display); font-weight: 500; font-size: 0.5625rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--gold-muted); margin-bottom: 16px; }
.impl-card { background: var(--white); border: 1px solid var(--parchment-dark); padding: 20px 24px; margin-bottom: 16px; }
.impl-card:last-child { margin-bottom: 0; }
.impl-audience { font-family: var(--font-mono); font-weight: 500; font-size: 0.625rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gold-muted); margin-bottom: 8px; }
.impl-card p { font-size: 0.9375rem; line-height: 1.7; color: var(--text-secondary); }
.impl-card p + p { margin-top: 12px; }

/* References */
.references { padding: 40px 0; border-bottom: 1px solid var(--parchment-deep); }
.ref-label { font-family: var(--font-display); font-weight: 500; font-size: 0.5625rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--gold-muted); margin-bottom: 16px; }
.ref-list { list-style: none; }
.ref-list li { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 10px; padding-left: 24px; text-indent: -24px; }
.ref-list li .ref-num { font-weight: 500; color: var(--navy); }
.ref-list li a { color: var(--gold-muted); text-decoration: none; }
.ref-list li a:hover { text-decoration: underline; }

/* Reproducibility */
.reproducibility { background: var(--white); border: 1px solid var(--parchment-dark); padding: 20px 24px; margin: 0 0 32px 0; }
.reproducibility .aside-label { font-family: var(--font-display); font-weight: 500; font-size: 0.5625rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 8px; }
.reproducibility p { font-size: 0.875rem; line-height: 1.7; color: var(--text-secondary); margin-bottom: 0; }
.reproducibility a { color: var(--gold-muted); text-decoration: none; }
.reproducibility a:hover { text-decoration: underline; }

/* Citation */
.citation-block { padding: 32px 0; border-top: 1px solid var(--parchment-deep); }
.cite-label { font-family: var(--font-display); font-weight: 500; font-size: 0.5625rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--gold-muted); margin-bottom: 8px; }
.cite-text { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary); line-height: 1.7; background: var(--white); border: 1px solid var(--parchment-dark); padding: 16px 20px; }

/* Publication Footer */
.pub-footer { padding: 48px 0 80px; }
.pub-footer-wm { font-family: var(--font-display); font-weight: 400; font-size: 0.6875rem; letter-spacing: 0.32em; color: var(--text-muted); text-transform: uppercase; margin-bottom: 12px; }
.pub-footer-text { font-size: 0.8125rem; color: var(--text-muted); line-height: 1.7; max-width: 480px; margin-bottom: 8px; }
.pub-footer-contact { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-muted); margin-top: 16px; }
.pub-footer-contact a { color: var(--gold-muted); text-decoration: none; }
.pub-footer-contact a:hover { color: var(--navy); }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 640px) {
    .pub-header { padding: 72px 0 36px; }
    .pub-masthead { flex-direction: column; gap: 8px; }
}
@media (max-width: 600px) {
    .site-nav { padding: 10px 20px; }
    .nav-links { gap: 16px; }
}