/* ============================
   NAVIGATION
   ============================ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  background: rgba(6, 8, 12, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s ease, padding 0.4s ease;
}

nav.scrolled {
  border-bottom-color: var(--border);
  padding: 0.6rem 0;
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  border: none;
  display: flex;
  align-items: center;
}
.nav-brand:hover { border: none; }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: none;
  transition: color 0.3s ease;
}
.nav-links a:hover { color: var(--text-primary); border: none; }
.nav-links a.active { color: var(--accent); }

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    gap: 1rem;
  }
  .nav-mobile-toggle { display: block; }
  nav .container { flex-wrap: nowrap; }
  .theme-toggle { order: 2; }
  .nav-mobile-toggle { order: 3; margin-left: 0.3rem; }
}

/* ============================
   PROBLEM SECTION
   ============================ */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  .problem-grid { grid-template-columns: 1fr; }
}

.problem-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.problem-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
}

.problem-card h3 {
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

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

.problem-card .mono {
  display: block;
  margin-top: 1rem;
  color: var(--accent);
  font-size: 0.82rem;
}

/* ============================
   FRAMEWORK SECTION
   ============================ */
.framework-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

@media (max-width: 900px) {
  .framework-main { grid-template-columns: 1fr; }
}

.equation-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-dim);
  border-radius: 0 4px 4px 0;
  padding: 1.5rem 2rem;
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-light);
  overflow-x: auto;
}

.equation-block .label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  display: block;
}

.metric-list {
  list-style: none;
  margin-top: 1.5rem;
}

.metric-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

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

.metric-name {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
}

.metric-formula {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.metric-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
}

/* ============================
   THRESHOLD VIS
   ============================ */
.threshold-bar {
  display: flex;
  height: 36px;
  border-radius: 4px;
  overflow: hidden;
  margin: 2rem 0 1rem;
  border: 1px solid var(--border);
}

.threshold-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--bg-primary);
}

.zone-safe { background: #3a6b4a; flex: 3; }
.zone-weak { background: #4a6b3a; flex: 3; }
.zone-caution { background: #6b6a3a; flex: 3; }
.zone-problem { background: #8a5a3a; flex: 3; }
.zone-critical { background: #8a3a3a; flex: 1; }

.threshold-labels {
  display: flex;
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.threshold-labels span {
  text-align: center;
}

/* ============================
   CONTEXT TAXONOMY
   ============================ */
.context-taxonomy {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  margin-top: 1.5rem;
}

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

.context-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.2rem;
  font-size: 0.85rem;
}

.context-card:hover {
  border-color: var(--border-light);
}

.context-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.context-icon {
  font-size: 1rem;
  width: 1.5rem;
  text-align: center;
}

.context-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.context-header.constitutive .context-label { color: var(--red); }
.context-header.constitutive .context-icon { color: var(--red); }
.context-header.inductive .context-label { color: var(--green); }
.context-header.inductive .context-icon { color: var(--green); }
.context-header.deep .context-label { color: var(--blue); }
.context-header.deep .context-icon { color: var(--blue); }

.context-type {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
}

.context-desc {
  color: var(--text-secondary);
  font-size: 0.84rem;
  margin-bottom: 0.8rem;
  max-width: none;
}

.context-rule {
  font-size: 0.84rem;
  color: var(--accent-light);
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
  line-height: 1.5;
}

/* ============================
   EVIDENCE SECTION
   ============================ */
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
  margin-top: 2rem;
}

.evidence-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.8rem;
  text-align: center;
  transition: border-color 0.3s, transform 0.3s;
}

.evidence-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.evidence-number {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 400;
  color: var(--accent-light);
  line-height: 1;
}

.evidence-unit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}

.evidence-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.8rem;
}

.evidence-detail {
  margin-top: 2rem;
}

.evidence-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-top: 1.5rem;
}

.evidence-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-align: left;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-light);
}

.evidence-table td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.evidence-table tr:hover td {
  color: var(--text-primary);
  background: var(--bg-card);
}

.evidence-table .num {
  font-family: var(--font-mono);
  color: var(--accent);
  text-align: right;
}

/* ============================
   DOMAINS SECTION
   ============================ */
.domain-intro {
  max-width: 65ch;
  margin-bottom: 3rem;
}

.domain-categories {
  display: grid;
  gap: 1.8rem;
}

.domain-cat-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
}

.domain-cat-header h3 {
  font-size: 1.1rem;
  white-space: nowrap;
}

.domain-cat-header .line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.domain-cat-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.domain-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.domain-tag {
  font-size: 0.82rem;
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  cursor: pointer;
  font-family: var(--font-body);
  line-height: 1.7;
}

.domain-tag:hover {
  border-color: var(--accent-dim);
  color: var(--accent-light);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.domain-tag:active {
  transform: translateY(0);
}

.domain-tag.validated { border-left: 2px solid var(--green); }
.domain-tag.recent { border-left: 2px solid var(--blue); }
.domain-tag.plausible { border-left: 2px solid var(--accent); }
.domain-tag.speculative { border-left: 2px solid var(--text-dim); }

/* ============================
   DOMAIN MODAL
   ============================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(4, 6, 10, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  width: 100%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s ease;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal-overlay.open .modal-panel {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 1.8rem 2rem 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.modal-header h3 {
  font-size: 1.4rem;
  font-family: var(--font-display);
  font-weight: 400;
}

.modal-close {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.2rem 0.6rem;
  transition: all 0.2s;
  flex-shrink: 0;
  margin-left: 1rem;
}

.modal-close:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.modal-badges {
  display: flex;
  gap: 0.5rem;
  padding: 0.8rem 2rem 0;
  flex-wrap: wrap;
}

.modal-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
  border: 1px solid;
}

.modal-badge.status-validated { color: var(--green); border-color: var(--green); background: rgba(106,154,122,0.08); }
.modal-badge.status-plausible { color: var(--accent); border-color: var(--accent-dim); background: rgba(196,149,106,0.08); }
.modal-badge.status-speculative { color: var(--text-dim); border-color: var(--text-dim); background: rgba(92,88,79,0.08); }
.modal-badge.group-badge { color: var(--blue); border-color: var(--blue-dim); background: rgba(91,127,166,0.08); }

.modal-body {
  padding: 1.2rem 2rem 1.8rem;
}

.modal-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}

.modal-section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  margin-top: 1.2rem;
}

.modal-identity {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-light);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.6rem 1rem;
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.modal-connections {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.modal-conn {
  font-size: 0.78rem;
  padding: 0.2rem 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-secondary);
}

.modal-conn.c10 { border-left: 2px solid var(--green); }
.modal-conn.c7 { border-left: 2px solid var(--blue); }
.modal-conn.c5 { border-left: 2px solid var(--text-dim); }

.modal-conn-legend {
  display: flex;
  gap: 1rem;
  margin-top: 0.6rem;
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.modal-conn-legend span::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  margin-right: 0.3rem;
  vertical-align: middle;
}

.modal-conn-legend .leg-10::before { background: var(--green); }
.modal-conn-legend .leg-7::before { background: var(--blue); }
.modal-conn-legend .leg-5::before { background: var(--text-dim); }

/* ============================
   SYNERGY SECTION
   ============================ */
.synergy-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: center;
  margin: 2rem 0;
}

@media (max-width: 768px) {
  .synergy-flow {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .synergy-arrow { transform: rotate(90deg); }
}

.synergy-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.8rem;
  text-align: center;
}

.synergy-step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.synergy-step h3 {
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
}

.synergy-step p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  max-width: none;
}

.synergy-arrow {
  color: var(--accent-dim);
  font-size: 1.5rem;
  text-align: center;
  padding: 0 0.5rem;
}

/* ============================
   SOFTWARE SECTION
   ============================ */
.software-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  .software-grid { grid-template-columns: 1fr; }
}

.code-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
  overflow-x: auto;
}

.code-block pre {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.code-block .lang-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-dim);
  margin-bottom: 0.8rem;
  display: block;
}

.code-block .comment { color: var(--text-dim); }
.code-block .keyword { color: var(--blue); }
.code-block .string { color: var(--green); }
.code-block .func { color: var(--accent); }

/* ============================
   ONTOLOGY SECTION
   ============================ */
.ontology-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
  align-items: start;
}

@media (max-width: 768px) {
  .ontology-content { grid-template-columns: 1fr; gap: 2rem; }
}

.ontology-principle {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.ontology-principle:last-child { border-bottom: none; }

.ontology-principle h3 {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
  color: var(--accent-light);
}

.ontology-principle p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.quote-block {
  border-left: 2px solid var(--accent-dim);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  background: var(--bg-card);
  border-radius: 0 4px 4px 0;
}

.quote-block p {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.5;
  max-width: none;
}

/* ============================
   CONTACT / FOOTER
   ============================ */
.contact-section {
  text-align: center;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.contact-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  min-width: 160px;
  transition: all 0.3s ease;
}

.contact-link:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
  border-bottom-color: var(--accent-dim);
}

.contact-link-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.contact-link-value {
  font-size: 0.92rem;
  color: var(--accent);
}

footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

footer p {
  font-size: 0.78rem;
  color: var(--text-dim);
  max-width: none;
}