/* ===== Reset & Variables ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --forest: #1e3a2f;
    --forest-dark: #162a22;
    --forest-light: #f4f7f5;
    --text: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #777;
    --border: #e5e5e3;
    --bg: #ffffff;
    --bg-alt: #faf9f7;
}
html { scroll-behavior: smooth; }
body {
    font-family: 'IBM Plex Sans', -apple-system, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
}

/* ===== Header ===== */
header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--forest);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}
.logo-tagline {
    font-weight: 300;
    font-size: 10px;
    letter-spacing: 0.06em;
    text-transform: lowercase;
    color: var(--text-muted);
    font-style: italic;
}
.logo-img {
    height: 96px;
    width: auto;
    display: block;
}
[data-theme="dark"] .logo-img {
    filter: brightness(1.3) saturate(0.85);
}
nav { display: flex; gap: 32px; align-items: center; }
nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 13px;
    letter-spacing: 0.02em;
    transition: color 0.2s;
}
nav a:hover, nav a.active { color: var(--forest); }

/* ===== Hero ===== */
.hero {
    padding: 120px 40px 100px;
    max-width: 960px;
    margin: 0 auto;
}
.hero h1 {
    font-family: 'IBM Plex Serif', Georgia, serif;
    font-size: 44px;
    font-weight: 300;
    line-height: 1.25;
    color: var(--text);
    margin-bottom: 32px;
    max-width: 700px;
}
.hero-text {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 48px;
}
.hero-meta {
    display: flex;
    gap: 40px;
    font-size: 13px;
    color: var(--text-muted);
}
.hero-meta a {
    color: var(--forest);
    text-decoration: none;
}
.hero-meta a:hover { text-decoration: underline; }

/* ===== Signal Cards ===== */
.signal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-bottom: 48px;
    max-width: 880px;
}
.signal-card {
    padding: 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
}
.signal-card h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--forest);
    margin-bottom: 8px;
}
.signal-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.signal-num {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

/* ===== Signal Dashboard ===== */
.signal-dashboard {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    margin-bottom: 48px;
    max-width: 880px;
}
.signal-dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}
.signal-dashboard-title {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--forest);
}
.signal-dashboard-updated {
    font-size: 12px;
    color: var(--text-muted);
}
.signal-dashboard-grid {
    padding: 8px 0;
}
.signal-dashboard-row {
    display: grid;
    grid-template-columns: 80px 1fr 120px;
    align-items: center;
    padding: 10px 24px;
    border-bottom: 1px solid var(--border);
}
.signal-dashboard-row:last-child {
    border-bottom: none;
}
.sd-code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}
.sd-name {
    font-size: 14px;
    color: var(--text-secondary);
}
.sd-status {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    text-align: right;
}
.sd-status.consensus {
    color: var(--forest);
}
.sd-status.divergence {
    color: #ea580c;
}
.signal-dashboard-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-muted);
}
.signal-dashboard-footer a {
    color: var(--forest);
    text-decoration: none;
    font-size: 13px;
}
.signal-dashboard-footer a:hover {
    text-decoration: underline;
}

/* ===== Divider ===== */
.divider {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 40px;
}
.divider hr {
    border: none;
    border-top: 1px solid var(--border);
}

/* ===== Sections ===== */
.section {
    max-width: 960px;
    margin: 0 auto;
    padding: 80px 40px;
}
.section h2 {
    font-family: 'IBM Plex Serif', Georgia, serif;
    font-size: 28px;
    font-weight: 400;
    color: var(--text);
    margin-bottom: 24px;
}
.section p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
    max-width: 640px;
}
.section-link {
    display: inline-block;
    margin-top: 8px;
    font-size: 14px;
    color: var(--forest);
    text-decoration: none;
    letter-spacing: 0.01em;
}
.section-link:hover { text-decoration: underline; }

/* ===== Page Header ===== */
.page-header {
    padding: 80px 40px 60px;
    max-width: 960px;
    margin: 0 auto;
}
.page-header h1 {
    font-family: 'IBM Plex Serif', Georgia, serif;
    font-size: 36px;
    font-weight: 300;
    color: var(--text);
    margin-bottom: 16px;
}
.page-header p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 640px;
    line-height: 1.8;
}

/* ===== Content ===== */
.content {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 40px 80px;
}
.section-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--forest);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-top: 48px;
}
.section-label:first-child { margin-top: 0; }
.body-text {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
    max-width: 680px;
}

/* ===== Publications ===== */
.pub-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 32px;
}
.pub-card {
    padding: 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
}
.pub-journal {
    font-size: 12px;
    color: var(--forest);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}
.pub-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 8px;
}
.pub-title a {
    color: inherit;
    text-decoration: underline;
    text-underline-offset: 2px;
}
.pub-title a:hover { opacity: 0.7; }
.pub-authors {
    font-size: 13px;
    color: var(--text-muted);
}
.pub-item {
    padding: 28px 0;
    border-bottom: 1px solid var(--border);
}
.pub-item:last-child { border-bottom: none; }
.pub-venue {
    font-size: 12px;
    color: var(--forest);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}
.pub-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 680px;
}

/* ===== Tables ===== */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
}
th {
    text-align: left;
    padding: 10px 16px;
    background: var(--forest-light);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text);
    border-bottom: 2px solid var(--border);
}
td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}
td code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--forest);
    background: var(--forest-light);
    padding: 2px 6px;
}

/* ===== Delivery Grid ===== */
.delivery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin: 24px 0;
}
.delivery-card {
    padding: 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
}
.delivery-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}
.delivery-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== Note Box ===== */
.note-box {
    background: var(--bg-alt);
    border-left: 3px solid var(--forest);
    padding: 20px 24px;
    margin: 24px 0;
}
.note-box p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* ===== Note Items ===== */
.note-item {
    padding: 28px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    margin-bottom: 20px;
}
.note-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}
.note-authors {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 10px;
}
.note-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Team/Person ===== */
.person { margin-bottom: 40px; }
.person-name {
    font-size: 18px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 4px;
}
.person-role {
    font-size: 13px;
    color: var(--forest);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
}
.person-bio {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 680px;
}

/* ===== Advisory Grid ===== */
.advisory-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.advisory-card {
    padding: 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
}
.advisory-name {
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 4px;
}
.advisory-role {
    font-size: 11px;
    color: var(--forest);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 10px;
}
.advisory-bio {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== Company Note ===== */
.company-note {
    margin-top: 48px;
    padding: 24px;
    background: var(--bg-alt);
    border-left: 3px solid var(--forest);
}
.company-note p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 8px;
}
.company-note p:last-child { margin-bottom: 0; }

/* ===== Contact Page ===== */
.page-content {
    max-width: 960px;
    margin: 0 auto;
    padding: 120px 40px 160px;
}
.page-content h1 {
    font-family: 'IBM Plex Serif', Georgia, serif;
    font-size: 36px;
    font-weight: 300;
    color: var(--text);
    margin-bottom: 32px;
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
.contact-item h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--forest);
    margin-bottom: 10px;
}
.contact-item p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.contact-item a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
}
.contact-item a:hover {
    border-bottom-color: var(--forest);
}
.substack-note {
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-muted);
}
.substack-note a {
    color: var(--forest);
    text-decoration: none;
}
.substack-note a:hover { text-decoration: underline; }

/* ===== Legal Page ===== */
.legal-section { margin-bottom: 48px; }
.legal-section h2 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--forest);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}
.legal-section p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 12px;
    max-width: 680px;
}
.legal-section ul {
    margin: 12px 0;
    padding-left: 20px;
}
.legal-section li {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 4px;
}
.legal-entity {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 48px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}
.legal-entity strong { color: var(--text); }

/* ===== Press Bar ===== */
.press-bar {
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 20px 40px;
    text-align: center;
}
.press-bar span {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.03em;
}
.press-bar a {
    color: var(--text-secondary);
    text-decoration: none;
}
.press-bar a:hover { text-decoration: underline; }

/* ===== Contact Section (dark) ===== */
.contact-section {
    background: var(--forest);
    color: white;
    padding: 64px 40px;
    text-align: center;
}
.contact-section h2 {
    font-family: 'IBM Plex Serif', Georgia, serif;
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 12px;
}
.contact-section p {
    font-size: 15px;
    opacity: 0.85;
    margin-bottom: 8px;
}
.contact-section a {
    color: white;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.4);
}
.contact-section a:hover {
    border-bottom-color: white;
}

/* ===== Forward Test Box ===== */
.forward-test-box {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    padding: 32px;
    max-width: 680px;
}
.forward-test-box h3 {
    font-family: 'IBM Plex Serif', Georgia, serif;
    font-size: 20px;
    font-weight: 400;
    color: var(--text);
    margin-bottom: 16px;
}
.forward-test-box p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
    max-width: 640px;
}
.cta {
    display: inline-block;
    margin-top: 8px;
    font-size: 14px;
    color: var(--forest);
    text-decoration: none;
    font-weight: 500;
}
.cta:hover { text-decoration: underline; }

/* ===== Spacer ===== */
.spacer { height: 48px; }

/* ===== Footer ===== */
footer {
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    padding: 24px 40px;
}
.footer-inner {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-legal {
    font-size: 11px;
    color: var(--text-muted);
}
.footer-links { display: flex; gap: 20px; }
.footer-links a {
    font-size: 11px;
    color: var(--text-muted);
    text-decoration: none;
}
.footer-links a:hover { color: var(--forest); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero h1 { font-size: 32px; }
    .hero { padding: 80px 24px 60px; }
    .section { padding: 60px 24px; }
    .pub-grid { grid-template-columns: 1fr; }
    .signal-grid { grid-template-columns: 1fr; }
    .hero-meta { flex-direction: column; gap: 12px; }
    nav { gap: 20px; }
    .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
    .page-header h1 { font-size: 28px; }
    .page-header, .content { padding-left: 24px; padding-right: 24px; }
    .delivery-grid { grid-template-columns: 1fr; }
    .advisory-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .page-content { padding: 80px 24px 120px; }
    .page-content h1 { font-size: 28px; }
    .signal-dashboard-row { grid-template-columns: 60px 1fr 100px; }
}
@media (max-width: 480px) {
    nav { display: none; }
}

/* ===== Dark Mode ===== */
[data-theme="dark"] {
    --forest: #89C4E1;
    --forest-dark: #6BAED4;
    --forest-light: #1a2430;
    --text: #e8e6e3;
    --text-secondary: #b0ada8;
    --text-muted: #7a7772;
    --border: #2a2f36;
    --bg: #0f1419;
    --bg-alt: #161b22;
}
[data-theme="dark"] body { background: var(--bg); color: var(--text); }
[data-theme="dark"] header { background: #0f1419; border-bottom-color: var(--border); }
[data-theme="dark"] footer { background: var(--bg-alt); border-top-color: var(--border); }
[data-theme="dark"] .contact-section { background: #16222a; }
[data-theme="dark"] th { background: #1a2430; }

/* ===== Theme Toggle ===== */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    padding: 5px 8px;
    font-size: 14px;
    line-height: 1;
    color: var(--text-muted);
    transition: color 0.3s, border-color 0.3s;
    margin-left: 24px;
}
.theme-toggle:hover {
    color: var(--forest);
    border-color: var(--forest);
}

/* ===== Smooth Transitions ===== */
body, header, footer, .signal-card, .pub-card, .delivery-card,
.advisory-card, .note-item, .note-box, .legal-entity, .company-note,
.contact-item a, nav a, .logo, .logo-tagline, .forward-test-box,
.signal-dashboard, .glossary-item, .toc-box, .gate-framework {
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}