/* ────────────────────────────────────────────────────────────
   Shared site styles — tokens, base, nav, theme toggle, footer
   Used by index.html and every blog post.
   Page-specific styles live inline in each page.
   ──────────────────────────────────────────────────────────── */

:root {
    --bg: #FAFAF7;
    --bg-alt: #F2F1EC;
    --text: #1A1A1A;
    --text-secondary: #5A5A58;
    --accent: #8B2500;
    --accent-light: #B8462A;
    --border: #D8D6CE;
    --nav-bg: rgba(255, 255, 255, 0.62);
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-stroke: rgba(0, 0, 0, 0.12);
    --glass-highlight: rgba(255, 255, 255, 0.7);
    --glass-shine: linear-gradient(180deg, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0) 45%);
    --glass-lift: 0 18px 48px -10px rgba(0, 0, 0, 0.12), 0 4px 14px rgba(0, 0, 0, 0.05);
    --glass-blur: 30px;
    --glass-saturate: 180%;
    --shadow-sm: 0 2px 20px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.07);
    --accent-rgb: 139, 37, 0;
    --noise-opacity: 0;
    --link-underline: rgba(0, 0, 0, 0.32);
    --serif: 'EB Garamond', Georgia, 'Times New Roman', serif;
    --sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'JetBrains Mono', 'Courier New', monospace;
}
[data-theme="dark"] {
    --bg: #17161A;
    --bg-alt: #232026;
    --text: #EFEDE6;
    --text-secondary: #A6A39C;
    --accent: #E07650;
    --accent-light: #F0916F;
    --border: #34313A;
    --nav-bg: rgba(23, 22, 26, 0.45);
    --glass-bg: rgba(28, 27, 32, 0.55);
    --glass-stroke: rgba(255, 255, 255, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.16);
    --glass-shine: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 45%);
    --glass-lift: 0 22px 60px -12px rgba(0, 0, 0, 0.6), 0 6px 18px rgba(0, 0, 0, 0.35);
    --shadow-sm: 0 2px 20px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 10px 32px rgba(0, 0, 0, 0.45);
    --accent-rgb: 224, 118, 80;
    --noise-opacity: 0;
    --link-underline: rgba(255, 255, 255, 0.32);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.35s ease, color 0.35s ease;
}
/* Subtle film-grain texture. Sits BEHIND content (z-index: -1) so the
   browser doesn't have to recomposite scrolling glass cards through it
   on every frame — previously this used mix-blend-mode: overlay at
   z:9999 which caused ghost-card artifacts during scroll. */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: var(--noise-opacity);
    pointer-events: none;
    z-index: -1;
}

/* Hide placeholders until the JS injects their contents — prevents
   a one-frame flash of an empty pill / footer before render. */
nav[data-site-nav]:empty,
footer[data-site-footer]:empty { visibility: hidden; }

/* ── Floating liquid-glass nav pill ─────────────────────────── */
nav[data-site-nav] {
    position: fixed;
    top: 1.1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    width: min(820px, calc(100vw - 2rem));
    background: var(--nav-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 999px;
    box-shadow: var(--glass-lift), inset 0 1px 0 var(--glass-highlight), inset 0 0 0 1px var(--glass-stroke);
    transition: background-color 0.35s ease, box-shadow 0.35s ease;
    overflow: hidden;
}
nav[data-site-nav]::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: var(--glass-shine);
    border-radius: inherit;
}
nav[data-site-nav] .nav-inner {
    padding: 0.6rem 1.8rem 0.6rem 1.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2.5rem;
    position: relative;
    z-index: 1;
}
nav[data-site-nav] .logo {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.01em;
}
nav[data-site-nav] ul {
    list-style: none;
    display: flex;
    gap: 2.2rem;
    align-items: center;
}
nav[data-site-nav] ul a {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-decoration: none;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.25s;
}
nav[data-site-nav] ul a:hover { color: var(--text); }
nav[data-site-nav] ul a.active { color: var(--text); font-weight: 500; }

/* ── Theme toggle button (lives inside nav ul) ──────────────── */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    width: 28px;
    height: 28px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    transition: color 0.25s, background-color 0.25s, transform 0.45s ease;
}
.theme-toggle:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
}
.theme-toggle:active { transform: rotate(45deg); }
.theme-toggle svg { width: 15px; height: 15px; display: block; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ── Footer ─────────────────────────────────────────────────── */
footer[data-site-footer] {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 2rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}
footer[data-site-footer] a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--link-underline);
    transition: border-color 0.25s, color 0.25s;
}
footer[data-site-footer] a:hover { border-color: var(--text); }
footer[data-site-footer] .footer-socials {
    display: inline-flex;
    gap: 1rem;
    align-items: center;
}
footer[data-site-footer] .footer-socials a {
    color: var(--text-secondary);
    border-bottom: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
footer[data-site-footer] .footer-socials a:hover { color: var(--text); }
footer[data-site-footer] .footer-socials svg { width: 16px; height: 16px; display: block; }

/* ── Publication detail page (used by /publications/<slug>/index.html) ── */
.paper-detail { max-width: 880px; margin: 8rem auto 4rem; padding: 0 2rem; }
.paper-back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color 0.25s;
}
.paper-back:hover { color: var(--text); }
.paper-back svg { width: 14px; height: 14px; }

.paper-cover {
    margin-bottom: 2.5rem;
    padding: 14px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 22px;
    box-shadow: var(--glass-lift), inset 0 1px 0 var(--glass-highlight), inset 0 0 0 1px var(--glass-stroke);
    position: relative;
    overflow: hidden;
}
.paper-cover::after { content: ''; position: absolute; inset: 0; pointer-events: none; background: var(--glass-shine); border-radius: inherit; }
.paper-cover img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 14px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18), inset 0 0 0 1px var(--glass-stroke);
    position: relative;
    z-index: 1;
}

.paper-title {
    font-family: var(--serif);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1.18;
    letter-spacing: -0.015em;
    margin: 0 0 0.9rem;
    color: var(--text);
    max-width: 820px;
}
.paper-authors {
    font-size: 0.98rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 820px;
    margin: 0 0 0.6rem;
}
.paper-authors strong { color: var(--text); font-weight: 600; }
.paper-venue {
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}
.paper-abstract, .paper-method-text {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0;
}
.paper-method-text { margin-top: 1.4rem; }

.paper-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 1.6rem; }
.paper-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    text-decoration: none;
    color: var(--text);
    padding: 0.6rem 1.2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 999px;
    box-shadow: inset 0 1px 0 var(--glass-highlight), inset 0 0 0 1px var(--glass-stroke);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.paper-pill:hover { transform: translateY(-1px); box-shadow: 0 8px 24px -6px rgba(0, 0, 0, 0.1), inset 0 1px 0 var(--glass-highlight), inset 0 0 0 1px var(--glass-stroke); }
.paper-pill svg { width: 14px; height: 14px; }

.paper-section { margin-top: 3.5rem; }
.paper-section h2 {
    font-family: var(--serif);
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0 0 1.2rem;
    color: var(--text);
}

.paper-figure {
    position: relative;
    padding: 14px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 18px;
    box-shadow: var(--glass-lift), inset 0 1px 0 var(--glass-highlight), inset 0 0 0 1px var(--glass-stroke);
    overflow: hidden;
}
.paper-figure::after { content: ''; position: absolute; inset: 0; pointer-events: none; background: var(--glass-shine); border-radius: inherit; }
.paper-figure img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 14px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18), inset 0 0 0 1px var(--glass-stroke);
    position: relative;
    z-index: 1;
}

.paper-table-wrap {
    overflow-x: auto;
    border-radius: 12px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    box-shadow: inset 0 0 0 1px var(--glass-stroke);
}
.paper-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.paper-table th, .paper-table td { padding: 0.75rem 1.2rem; text-align: left; }
.paper-table th {
    font-family: var(--mono);
    font-size: 0.66rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--glass-stroke);
    font-weight: 500;
}
.paper-table td { color: var(--text-secondary); border-bottom: 1px solid var(--glass-stroke); }
.paper-table tr:last-child td { border-bottom: 0; }
.paper-table td:first-child { font-family: var(--mono); color: var(--text); }
.paper-table td.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }

.paper-pending {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--text-secondary);
    padding: 1.6rem;
    background: var(--glass-bg);
    border-radius: 12px;
    box-shadow: inset 0 0 0 1px var(--glass-stroke);
    text-align: center;
    letter-spacing: 0.04em;
}
.paper-pending::before { content: '— '; }
.paper-pending::after { content: ' —'; }

.paper-citation {
    font-family: var(--mono);
    font-size: 0.78rem;
    line-height: 1.6;
    color: var(--text);
    padding: 1.4rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 12px;
    box-shadow: inset 0 0 0 1px var(--glass-stroke);
    overflow-x: auto;
    white-space: pre;
    margin: 0;
}

@media (max-width: 720px) {
    .paper-detail { margin: 7rem auto 3rem; padding: 0 1.3rem; }
    .paper-title { font-size: 1.7rem; }
    .paper-section { margin-top: 2.5rem; }
    .paper-section h2 { font-size: 1.3rem; }
    .paper-cover, .paper-figure { padding: 10px; border-radius: 18px; }
    .paper-cover img, .paper-figure img { border-radius: 12px; }
    .paper-table th, .paper-table td { padding: 0.6rem 0.9rem; }
}

/* ── Responsive: tablet & smaller ───────────────────────────── */
@media (max-width: 880px) {
    nav[data-site-nav] .nav-inner { padding: 0.55rem 1.4rem 0.55rem 1.5rem; gap: 1.6rem; }
    nav[data-site-nav] ul { gap: 1.6rem; }
    nav[data-site-nav] ul a { font-size: 0.68rem; }
}
/* On phones, the nav becomes Logo + Theme toggle. The menu items
   are hidden — sections are still reachable by scrolling. */
@media (max-width: 640px) {
    nav[data-site-nav] { width: auto; }
    nav[data-site-nav] .nav-inner { padding: 0.5rem 0.8rem 0.5rem 1.25rem; gap: 1rem; }
    nav[data-site-nav] ul { gap: 0; }
    nav[data-site-nav] ul li:not(:last-child) { display: none; }
    nav[data-site-nav] .logo { font-size: 1rem; }
    footer[data-site-footer] { flex-direction: column; gap: 0.6rem; text-align: center; padding: 2.5rem 1.5rem 3rem; }
}