/* ==========================================================================
   Custom Properties
   ========================================================================== */

:root {
  /* Colors */
  --bg: #FAFAF8;
  --bg-data: #F5F4F0;
  --text-primary: #1A1A1A;
  --text-secondary: #4A4A4A;
  --accent: #0D5257;
  --accent-light: #0D525710;
  --amber: #B87A1F;
  --pass: #0D5257;
  --fail: #8B3A3A;
  --critical: #6B2020;
  --border: #E0DED8;
  --nav-bg: rgba(250, 250, 248, 0.95);

  /* Typography */
  --font-heading: 'Inter', -apple-system, sans-serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing */
  --section-gap: 100px;
  --container-narrow: 720px;
  --container-wide: 900px;

  /* Nav */
  --nav-height: 56px;
}

/* ==========================================================================
   Base
   ========================================================================== */

body {
  font-family: var(--font-body);
  font-size: 18px;
  color: var(--text-primary);
  background: var(--bg);
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--section-gap) 0;
}

.section--data {
  background: var(--bg-data);
}

.section--data + .section--data {
  padding-top: 0;
}

.section--contact {
  padding-bottom: 60px;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  color: var(--text-primary);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.nav.scrolled {
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--accent);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding-top: calc(var(--nav-height) + 80px);
  padding-bottom: 80px;
}

.hero-layout {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 32px;
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo-placeholder {
  width: 160px;
  height: 160px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-data);
}

.hero-photo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  flex: 1;
}

.hero-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 2.5rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 8px;
}

.hero-tagline {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.hero-statement {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 16px;
  max-width: 640px;
}

.hero-statement--secondary {
  font-size: 1.05rem;
  margin-bottom: 0;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: #0a4245;
}

.btn--secondary {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn--secondary:hover {
  background: var(--accent-light);
}

/* ==========================================================================
   The Gap Section
   ========================================================================== */

#gap p {
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.gap-list {
  margin: 20px 0;
  padding-left: 24px;
  list-style: none;
}

.gap-list li {
  color: var(--text-secondary);
  padding: 4px 0;
  position: relative;
  padding-left: 20px;
}

.gap-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 2px;
  background: var(--accent);
}

.gap-declaration {
  margin-top: 32px;
  border-left: 3px solid var(--accent);
  padding-left: 20px;
}

.gap-declaration p {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary) !important;
  margin-bottom: 4px !important;
  font-size: 1rem;
}

.gap-declaration p:last-child {
  color: var(--accent) !important;
  font-size: 1.05rem;
}

/* ==========================================================================
   Work Section
   ========================================================================== */

.work-subtitle {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--accent);
  margin-bottom: 24px;
}

.build-features {
  list-style: none;
  margin-bottom: 32px;
}

.build-features li {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.build-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 2px;
  background: var(--accent);
}

.build-features a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.build-focus {
  margin-bottom: 32px;
}

.build-focus-label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.build-focus-list {
  list-style: none;
}

.build-focus-list li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 24px;
  position: relative;
}

.build-focus-list li::before {
  content: '\2192';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.holding-health-note {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
}

.holding-health-note a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.proof-intro {
  color: var(--text-secondary);
  margin-bottom: 16px;
  max-width: 720px;
}

.proof-intro:last-of-type {
  margin-bottom: 32px;
}

/* Gap Proof Display */

.gap-proof {
  margin-bottom: 48px;
}

.gap-proof-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.gap-proof-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 32px;
  max-width: 640px;
}

.gap-row {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.gap-model {
  margin-bottom: 16px;
}

.gap-model-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
}

.gap-scores {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.gap-condition {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 20px;
  border-radius: 6px;
  min-width: 140px;
  background: var(--bg);
}

.gap-condition--pass {
  border: 1.5px solid var(--pass);
}

.gap-condition--fail {
  border: 1.5px solid var(--fail);
}

.gap-condition--critical {
  border: 1.5px solid var(--critical);
}

.gap-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.gap-score {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.2;
}

.gap-total {
  font-size: 1rem;
  color: var(--text-secondary);
}

.gap-badge {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 3px;
  margin-top: 6px;
}

.gap-badge--pass {
  background: #0D525715;
  color: var(--pass);
}

.gap-badge--fail {
  background: #8B3A3A12;
  color: var(--fail);
}

.gap-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

.gap-arrow {
  font-size: 1.5rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.gap-delta {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 20px;
  margin-left: auto;
}

.gap-delta-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.gap-delta-value {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 400;
  color: var(--amber);
  line-height: 1.2;
}

.gap-ci {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Intent Recognition Callout */

.callout {
  background: #fff;
  border: 1px solid var(--border);
  border-left: 3px solid var(--amber);
  border-radius: 0 8px 8px 0;
  padding: 24px;
  margin-bottom: 48px;
}

.callout-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
}

.callout p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.mono {
  font-family: var(--font-mono);
}

.highlight-amber {
  color: var(--amber);
  font-weight: 400;
}

/* Six-Dimension Table */

.dimension-table-wrap {
  margin-bottom: 48px;
}

.dimension-table-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.dimension-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.dimension-table th {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.dimension-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.dimension-table td:first-child {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 400;
}

.dim-failure {
  font-family: var(--font-body) !important;
  color: var(--text-secondary);
  font-size: 0.82rem !important;
  font-style: italic;
}

.dim-delta {
  color: var(--amber);
  font-weight: 400;
}

.dim-delta--large {
  color: var(--amber);
  font-weight: 400;
}

.dim-delta--zero {
  color: var(--text-secondary);
}

.zero-var {
  background: #F0EDEA;
}

.total-row {
  background: var(--bg);
}

.total-row td {
  border-bottom: none;
  padding-top: 12px;
  padding-bottom: 12px;
}

.table-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 12px;
}

.zero-var-note {
  background: #F0EDEA;
  padding: 1px 6px;
  border-radius: 2px;
}

/* Work Links & Framework */

.work-links {
  margin-bottom: 40px;
}

.framework-note {
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.framework-note h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 16px;
}

.domain-list {
  list-style: none;
}

.domain-list li {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  padding: 16px 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}

.domain-list li:last-child {
  border-bottom: none;
}

.domain-content {
  flex: 1;
}

.domain-content strong {
  display: block;
  margin-bottom: 4px;
}

.domain-content p {
  font-weight: 400;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.domain-status {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 3px;
  flex-shrink: 0;
  margin-top: 2px;
  white-space: nowrap;
}

.domain-status--active {
  background: #0D525715;
  color: var(--accent);
}

.domain-status--dev {
  background: #B87A1F12;
  color: var(--amber);
}

.domain-status--early {
  background: #1A1A1A08;
  color: var(--text-secondary);
}

.domain-status--exploratory {
  background: #1A1A1A08;
  color: var(--text-secondary);
}

/* ==========================================================================
   Papers Section
   ========================================================================== */

.papers-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.paper {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.paper:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.paper-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 8px;
  line-height: 1.4;
}

.paper-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.paper-status {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.paper-status--working {
  color: var(--accent);
}

.paper-status--prep {
  color: var(--amber);
}

.paper-status--upcoming {
  color: var(--text-secondary);
}

/* ==========================================================================
   Writing Section
   ========================================================================== */

.writing-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.writing-item {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.writing-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.writing-link {
  display: block;
  transition: color 0.2s ease;
}

.writing-link:hover .writing-title {
  color: var(--accent);
}

.writing-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 6px;
  line-height: 1.4;
  transition: color 0.2s ease;
}

.writing-meta {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Background Section
   ========================================================================== */

.background-narrative {
  margin-bottom: 40px;
}

.background-narrative p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.background-narrative p:last-of-type {
  margin-bottom: 0;
}

.background-builds {
  list-style: none;
  margin-bottom: 20px;
}

.background-builds li {
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 24px;
  position: relative;
  font-size: 0.95rem;
}

.background-builds li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 2px;
  background: var(--accent);
}

.background-builds li strong {
  color: var(--text-primary);
}

.background-arc {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 0.95rem;
  color: var(--accent) !important;
}

.background-narrative strong {
  color: var(--text-primary);
}

.credentials {
  margin-bottom: 32px;
  padding: 24px;
  background: var(--bg-data);
  border-radius: 8px;
}

.credentials-group h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.credentials-group ul li {
  font-size: 0.92rem;
  padding: 4px 0;
  color: var(--text-secondary);
}

.credentials-group ul li strong {
  color: var(--text-primary);
}

/* ==========================================================================
   Speaking Section
   ========================================================================== */

.speaking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.speaking-group h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.speaking-list li {
  font-size: 0.92rem;
  padding: 6px 0;
  color: var(--text-secondary);
}

/* ==========================================================================
   Collaborations Section
   ========================================================================== */

.collab-list {
  list-style: none;
}

.collab-list li {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.collab-list li:last-child {
  border-bottom: none;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact-links {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.contact-item {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.contact-item:hover {
  color: #0a4245;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer p {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Fade-in Animation
   ========================================================================== */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive: Tablet (768px)
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --section-gap: 72px;
  }

  body {
    font-size: 16px;
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero-statement {
    font-size: 1.1rem;
  }

  .hero-layout {
    gap: 24px;
  }

  .hero-photo-placeholder {
    width: 128px;
    height: 128px;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-links a {
    font-size: 0.8rem;
  }

  .gap-scores {
    flex-direction: column;
    align-items: stretch;
  }

  .gap-arrow {
    text-align: center;
    transform: rotate(90deg);
    font-size: 1.2rem;
  }

  .gap-condition {
    min-width: auto;
  }

  .gap-delta {
    margin-left: 0;
    flex-direction: row;
    gap: 12px;
    padding: 16px 0 0;
    border-top: 1px solid var(--border);
  }

  .credentials {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .speaking-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .section-title {
    font-size: 1.5rem;
  }
}

/* ==========================================================================
   Responsive: Mobile (480px)
   ========================================================================== */

@media (max-width: 480px) {
  :root {
    --section-gap: 56px;
    --nav-height: 48px;
  }

  .hero {
    padding-top: calc(var(--nav-height) + 48px);
  }

  .hero-layout {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .hero-photo-placeholder {
    width: 104px;
    height: 104px;
  }

  .hero-name {
    font-size: 1.75rem;
  }

  .hero-tagline {
    font-size: 0.88rem;
  }

  .hero-statement {
    font-size: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    text-align: center;
  }

  .nav-links {
    display: none;
  }

  .gap-row {
    padding: 16px;
  }

  .gap-score {
    font-size: 1.4rem;
  }

  .gap-delta-value {
    font-size: 1.75rem;
  }

  .contact-links {
    flex-direction: column;
    gap: 16px;
  }

  .callout {
    padding: 16px;
  }

  .dimension-table {
    font-size: 0.8rem;
  }

  .dimension-table th {
    font-size: 0.7rem;
  }
}

/* ==========================================================================
   Link Cards (Landing Page)
   ========================================================================== */

.cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.link-card {
  display: block;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.link-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(13, 82, 87, 0.08);
}

.link-card-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.link-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.link-card-arrow {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

/* Contact card variant — not a link */
.link-card--contact {
  cursor: default;
}

.link-card--contact:hover {
  border-color: var(--border);
  box-shadow: none;
}

.link-card--contact .contact-links {
  margin-top: 12px;
}

/* ==========================================================================
   Detail Page Layout
   ========================================================================== */

.detail-page .section:first-of-type {
  padding-top: calc(var(--nav-height) + 60px);
}

/* Domain results sections on results page */
.domain-results {
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}

.domain-results:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.domain-results-header {
  margin-bottom: 24px;
}

.domain-results-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.35rem;
  margin-bottom: 8px;
}

.domain-results-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 640px;
}

/* ==========================================================================
   Responsive: Cards
   ========================================================================== */

@media (max-width: 600px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }
}