/* Industrial Algebra — Global Styles */
/* Dark theme with CSS custom properties, no utility classes */

@font-face {
    font-family: 'JetBrains Mono IA';
    src: url('/font.ttf') format('truetype');
    font-weight: 400 700;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg-primary: #000;
    --bg-surface: rgba(255, 255, 255, 0.018);
    --border-color: rgba(0, 255, 255, 0.15);
    --border-glow: rgba(0, 255, 255, 0.2);
    --text-primary: rgba(225, 255, 255, 1);
    --text-secondary: rgba(175, 175, 175, 1);
    --text-dimmed: rgba(110, 110, 110, 1);
    --accent: rgba(0, 255, 255, 1);
    --accent-dim: rgba(0, 200, 200, 1);
    --font-mono: 'JetBrains Mono IA', 'JetBrains Mono', 'Monaco', 'Menlo', monospace;
    --content-width: 860px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    width: 100%;
    min-height: 100vh;
    background: #000;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

#app {
    position: relative;
    z-index: 1;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-dim);
}

/* ── Nav ── */
.site-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(5, 5, 5, 1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-nav > a {
    font-size: 1.125rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--accent);
}

/* ── Main ── */
.site-main {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ── Pages ── */
.page {
    padding: 4rem 0;
    min-height: 80vh;
    color: #e0e0e0;
}

.page-title {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: #e1ffff !important;
}

/* ── Glow text ── */
.glow-text {
    color: var(--text-primary);
}

.logo.glow-text {
    text-shadow:
        0 0 10px #00ffff,
        0 0 20px #00ffff,
        0 0 40px #00ffff,
        0 0 80px #00ffff;
    animation: pulse 2s ease-in-out infinite alternate;
}

.subtitle.glow-text {
    text-shadow:
        0 0 20px #00ffff,
        0 0 30px #00ffff,
        0 0 60px #00ffff,
        0 0 120px #00ffff;
}

.section-title.glow-text {
    text-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
}

@keyframes pulse {
    from { opacity: 0.85; }
    to { opacity: 1; }
}

/* ── Home ── */
.home-page {
    position: relative;
    overflow: hidden;
}

.bg-viz-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    opacity: 0.35;
}

body.canvas-hidden .bg-viz-canvas {
    display: none;
}

/* Canvas toggle button */
.canvas-toggle {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
    width: 2.75rem;
    height: 2.75rem;
    border: 1px solid var(--border-glow);
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    color: var(--accent);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, background 0.2s;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.canvas-toggle:hover {
    border-color: var(--accent);
    background: rgba(0, 255, 255, 0.1);
}

/* Opaque content backdrop for detail pages */
.blog-post,
.paper-landing {
    background: rgba(0, 0, 0, 0.95);
    border-radius: 12px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.home-content {
    position: relative;
    z-index: 1;
}

.hero {
    text-align: center;
    padding: 3rem 0 5rem;
}

.logo {
    font-size: 4.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.tagline {
    font-size: 1.125rem;
    color: var(--text-dimmed);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 4rem;
}

.subtitle {
    font-size: 2.25rem;
    font-weight: 400;
}

/* ── Section ── */
.section-title {
    font-size: 1.75rem;
    text-align: center;
    margin-bottom: 2.5rem;
}

/* ── Project cards ── */
.project-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: var(--content-width);
    margin: 0 auto;
}

.project-card {
    background: rgba(0, 255, 255, 0.09);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    transition: border-color 0.3s ease, background 0.3s ease;
}

.project-card:hover {
    border-color: var(--accent);
    background: rgba(0, 255, 255, 0.12);
}

.project-name {
    font-size: 1.5rem;
    font-weight: 600;
    display: block;
    margin-bottom: 1rem;
}

.project-description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 620px;
    margin: 0 auto 1rem;
    line-height: 1.7;
}

.project-github {
    font-size: 0.875rem;
    color: var(--text-dimmed);
}

.project-github:hover {
    color: var(--accent);
}

/* ── Footer ── */
.site-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-link {
    font-size: 0.875rem;
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-dimmed);
}

/* ── 404 ── */
.not-found {
    text-align: center;
    padding-top: 8rem;
}

.not-found h1 {
    font-size: 6rem;
    color: var(--accent);
}

/* ── Licensing ── */
.license-content ul {
    list-style: disc;
    padding-left: 1.5rem;
    margin: 1.5rem 0;
}

.license-content li {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.license-content li strong {
    color: var(--accent);
}

/* ── Viz page ── */
.viz-page {
    padding: 0;
    position: relative;
}

.viz-full-canvas {
    width: 100%;
    height: calc(100vh - 3.5rem);
    display: block;
}
.coming-soon {
    color: var(--text-dimmed);
    font-style: italic;
}

/* ── Page subtitle ── */
.page-subtitle {
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 720px;
    line-height: 1.7;
}

/* ── Loading ── */
.loading {
    color: var(--text-dimmed);
    padding: 2rem 0;
}

.error {
    color: var(--accent);
    padding: 2rem 0;
}

/* ── Back link ── */
.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    font-size: 0.875rem;
}

/* ── Tags ── */
.tag {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--text-dimmed);
    margin-right: 0.5rem;
}

/* ── Blog list ── */
.blog-list,
.papers-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.blog-card,
.paper-card {
    background: rgba(0, 255, 255, 0.09);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    padding: 3rem 2rem;
    transition: border-color 0.3s ease, background 0.3s ease;
}

.blog-card:hover,
.paper-card:hover {
    border-color: var(--accent);
    background: rgba(0, 255, 255, 0.12);
}

.blog-card-title,
.paper-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    display: block;
    margin-bottom: 0.75rem;
}

.blog-card-title:hover,
.paper-title:hover {
    text-decoration: underline;
}

.blog-card-excerpt,
.paper-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.blog-card-tags,
.paper-tags {
    margin-top: 0.5rem;
}

.paper-authors {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* ── Blog detail ── */

.blog-post {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.post-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

/* ── Paper landing page (academic format) ── */

.paper-landing {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* Hero section */
.paper-hero {
    text-align: center;
    padding: 3rem 0 2rem;
}

.paper-hero-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 1.25rem;
}

.paper-hero-authors {
    font-size: 1.125rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
    line-height: 1.8;
}

.author-name {
    white-space: nowrap;
}

.paper-hero-affiliations {
    font-size: 0.9375rem;
    color: var(--text-dimmed);
    margin-bottom: 1.5rem;
}

/* Action links (Paper / Code / Model / Demo) */
.paper-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.paper-link-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.55rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: var(--font-mono);
    border: 1px solid var(--accent);
    border-radius: 6px;
    color: var(--accent);
    background: transparent;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}

.paper-link-btn:hover {
    background: var(--accent);
    color: var(--bg);
}

.paper-hero-ids {
    font-size: 0.875rem;
    color: var(--text-dimmed);
    margin-bottom: 0.5rem;
}

.paper-hero-ids a {
    color: var(--accent);
    text-decoration: none;
}

.paper-hero-ids a:hover {
    text-decoration: underline;
}

.paper-hero-date {
    display: block;
    font-size: 0.875rem;
    color: var(--text-dimmed);
    margin-top: 0.75rem;
}

/* Teaser image */
.paper-teaser {
    margin: 2rem 0 3rem;
    text-align: center;
}

.paper-teaser-img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Sections */
.paper-section-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.paper-abstract {
    margin: 2rem 0 3rem;
}

.paper-abstract-text {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.8;
    text-align: justify;
}

/* Body content (rendered markdown) */
.paper-body {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.paper-body h2 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--accent);
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.paper-body h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--accent);
    margin: 1.75rem 0 0.75rem;
}

.paper-body p {
    margin: 0 0 1rem;
}

.paper-body pre {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}

.paper-body pre code {
    background: none;
    padding: 0;
}

.paper-body code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    background: rgba(255, 255, 255, 0.06);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
}

.paper-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9375rem;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}

.paper-body thead {
    background: rgba(255, 255, 255, 0.04);
}

.paper-body th,
.paper-body td {
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    text-align: left;
    vertical-align: top;
}

.paper-body th {
    font-weight: 600;
    color: var(--accent);
}

.paper-body td code {
    white-space: normal;
}

.paper-body ul,
.paper-body ol {
    margin: 0.5rem 0 1rem;
    padding-left: 1.5rem;
}

/* BibTeX */
.paper-bibtex {
    margin-top: 3rem;
}

.paper-bibtex-code {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--text-secondary);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

/* Citations / References */
.paper-citations {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.citation-list {
    padding-left: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.9375rem;
}

.citation-list li {
    margin-bottom: 0.5rem;
}

/* Paper footer */
.paper-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-dimmed);
}