/* ============================================
   KORAL — Portfolio Page Styles
   Felix Lenci — felixlenci.com
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-card: #16162a;
  --bg-code: #0d0d1a;
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a80;
  --accent: #7c5cff;
  --accent-light: #9d85ff;
  --accent-glow: rgba(124, 92, 255, 0.3);
  --accent-secondary: #00d4aa;
  --accent-secondary-glow: rgba(0, 212, 170, 0.2);
  --accent-warning: #ffb347;
  --accent-danger: #ff6b6b;
  --accent-success: #00d4aa;
  --border-subtle: rgba(124, 92, 255, 0.15);
  --border-card: rgba(124, 92, 255, 0.1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--accent);
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: transform var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 2px;
}
.nav-logo span {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.85rem;
  margin-left: 0.5rem;
}
.nav-byline {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-top: 2px;
  transition: color 0.2s;
}
.nav-byline:hover {
  color: var(--accent-light);
}
.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover {
  color: var(--text-primary);
}
.nav-links a:hover::after {
  width: 100%;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --- Hero Section --- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 5rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, var(--accent-glow) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, var(--accent-secondary-glow) 0%, transparent 50%);
  animation: heroGlow 15s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes heroGlow {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-5%, -5%) rotate(3deg); }
}

.hero-ascii {
  font-family: var(--font-mono);
  font-size: clamp(0.35rem, 1.4vw, 0.9rem);
  line-height: 1.15;
  color: var(--accent-light);
  white-space: pre;
  margin: 0 0 0.5rem 0;
  text-shadow: 0 0 20px var(--accent-glow);
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out;
  font-kerning: none;
  text-rendering: geometricPrecision;
  font-variant-ligatures: none;
  overflow-x: auto;
  max-width: 100%;
}
.hero-byline {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
  transition: color 0.2s;
}
.hero-byline:hover {
  color: var(--accent-light);
}
.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 300;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out 0.2s both;
}
.hero-tagline {
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  color: var(--text-primary);
  font-weight: 300;
  max-width: 700px;
  margin: 1rem auto 2rem;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out 0.4s both;
}
.hero-tagline em {
  color: var(--accent-light);
  font-style: normal;
  font-weight: 600;
}
.hero-badges {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2.5rem;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out 0.6s both;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--border-subtle);
  background: rgba(124, 92, 255, 0.08);
  color: var(--text-secondary);
}
.badge.accent {
  border-color: var(--accent);
  color: var(--accent-light);
  background: rgba(124, 92, 255, 0.15);
}
.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out 0.8s both;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 30px var(--accent-glow);
  color: #fff;
}
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(124, 92, 255, 0.08);
  color: var(--text-primary);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 800px;
  margin: 4rem auto 0;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out 1s both;
}
.stat {
  text-align: center;
}
.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-light);
  font-family: var(--font-mono);
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  line-height: 1.3;
}

/* --- Sections --- */
.section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.section-alt {
  background: var(--bg-secondary);
}
.section-alt .section {
  max-width: 1200px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}
.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.section-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* --- Cards --- */
.card-grid {
  display: grid;
  gap: 1.5rem;
}
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  opacity: 0;
  transition: opacity var(--transition);
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.card:hover::before {
  opacity: 1;
}
.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}
.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.card-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.card-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  margin-top: 0.75rem;
  background: rgba(124, 92, 255, 0.12);
  color: var(--accent-light);
  border: 1px solid var(--border-subtle);
}

/* --- Theory cards special --- */
.theory-card {
  padding: 2rem;
}
.theory-card .theory-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
}
.theory-card .theory-author {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.25rem 0 0.5rem;
}
.theory-card .theory-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.theory-card .theory-ia {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--accent-secondary);
  font-weight: 500;
}

/* --- ASCII Diagrams --- */
.ascii-block {
  background: var(--bg-code);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.ascii-block pre {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--accent-light);
  white-space: pre;
  margin: 0;
}
.ascii-block.green pre { color: var(--accent-secondary); }
.ascii-block.warning pre { color: var(--accent-warning); }

/* --- Code blocks --- */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  overflow: hidden;
}
.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: rgba(124, 92, 255, 0.06);
  border-bottom: 1px solid var(--border-card);
}
.code-lang {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}
.code-copy {
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all var(--transition);
}
.code-copy:hover {
  color: var(--accent-light);
  border-color: var(--accent);
}
.code-body {
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
}
.code-body pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin: 0;
}
.code-body .comment { color: var(--text-muted); }
.code-body .keyword { color: var(--accent-light); }
.code-body .string { color: var(--accent-secondary); }

/* --- Tables --- */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
thead {
  background: rgba(124, 92, 255, 0.08);
}
th {
  padding: 0.85rem 1.25rem;
  text-align: left;
  font-weight: 600;
  color: var(--accent-light);
  font-size: 0.8rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  white-space: nowrap;
}
td {
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--border-card);
  color: var(--text-secondary);
}
tr:hover td {
  background: rgba(124, 92, 255, 0.04);
}
td strong {
  color: var(--text-primary);
}

/* --- Belbin Grid --- */
.belbin-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.belbin-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all var(--transition);
  text-align: center;
}
.belbin-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.belbin-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 1px;
}
.belbin-name {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0.25rem 0;
}
.belbin-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.belbin-temp {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-secondary);
  margin-top: 0.5rem;
}
.belbin-category {
  grid-column: 1 / -1;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.5rem 0 0;
  border-bottom: 1px solid var(--border-subtle);
}

/* --- Topology section --- */
.topology-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.topology-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.topology-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.topology-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topology-name {
  font-size: 1.05rem;
  font-weight: 700;
}
.topology-thompson {
  font-size: 0.75rem;
  color: var(--accent-secondary);
  font-weight: 600;
}
.topology-body {
  padding: 1.25rem 1.5rem;
}
.topology-body .ascii-block {
  margin: 0 0 1rem 0;
}
.topology-use {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --- Template section --- */
.template-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.template-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.template-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}
.template-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-card);
  background: rgba(124, 92, 255, 0.04);
}
.template-name {
  font-size: 1.1rem;
  font-weight: 700;
}
.template-meta {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.template-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.template-body {
  padding: 1.25rem 1.5rem;
}
.template-agents {
  list-style: none;
}
.template-agents li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-card);
  font-size: 0.85rem;
}
.template-agents li:last-child {
  border-bottom: none;
}
.agent-name {
  font-weight: 600;
  color: var(--text-primary);
  min-width: 110px;
}
.agent-belbin {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(124, 92, 255, 0.1);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}
.agent-model {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-secondary);
  margin-left: auto;
}
.template-usecases {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-card);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Commands section --- */
.command-group {
  margin-bottom: 3rem;
}
.command-name {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 0.75rem;
}
.command-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 600px;
}
.subcommand-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.subcommand {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all var(--transition);
}
.subcommand:hover {
  border-color: var(--accent);
}
.subcommand code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-light);
  font-weight: 600;
}
.subcommand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
}

/* --- Antipatterns --- */
.antipattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1rem;
}
.antipattern {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.antipattern:hover {
  border-color: var(--accent-danger);
}
.antipattern-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-danger);
  min-width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 107, 107, 0.1);
  border-radius: 50%;
  flex-shrink: 0;
}
.antipattern-content {
  flex: 1;
}
.antipattern-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.antipattern-fix {
  font-size: 0.8rem;
  color: var(--accent-secondary);
  margin-top: 0.2rem;
}

/* --- Roadmap --- */
.roadmap {
  position: relative;
  padding-left: 2rem;
}
.roadmap::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-secondary), var(--text-muted));
}
.roadmap-item {
  position: relative;
  padding: 1.25rem 0 1.25rem 2rem;
}
.roadmap-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 1.7rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent);
}
.roadmap-item.active::before {
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.roadmap-item.future::before {
  border-color: var(--text-muted);
}
.roadmap-version {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-light);
}
.roadmap-version .roadmap-status {
  font-weight: 500;
  margin-left: 0.5rem;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}
.roadmap-status.released {
  background: rgba(0, 212, 170, 0.15);
  color: var(--accent-secondary);
}
.roadmap-status.planned {
  background: rgba(124, 92, 255, 0.15);
  color: var(--accent-light);
}
.roadmap-status.research {
  background: rgba(106, 106, 128, 0.2);
  color: var(--text-muted);
}
.roadmap-features {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
}

/* --- Installation --- */
.install-methods {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.install-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.install-card.recommended {
  border-color: var(--accent);
  position: relative;
}
.install-card.recommended::after {
  content: 'Recommande';
  position: absolute;
  top: -10px;
  right: 16px;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}
.install-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 2rem;
  text-align: center;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-brand {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
}
.footer-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 1rem;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* --- Accordion / Collapsible --- */
.accordion {
  margin: 1.5rem 0;
}
.accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
  overflow: hidden;
}
.accordion-header {
  padding: 1rem 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background var(--transition);
  user-select: none;
}
.accordion-header:hover {
  background: rgba(124, 92, 255, 0.04);
}
.accordion-arrow {
  transition: transform var(--transition);
  color: var(--text-muted);
  font-size: 0.85rem;
}
.accordion-item.open .accordion-arrow {
  transform: rotate(180deg);
}
.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.accordion-item.open .accordion-body {
  max-height: 2000px;
}
.accordion-content {
  padding: 0 1.25rem 1.25rem;
}

/* --- Execution flow section --- */
.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}
.flow-step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  position: relative;
}
.flow-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 40px;
}
.flow-dot {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  border: 2px solid var(--accent);
  background: var(--bg-primary);
}
.flow-line {
  width: 2px;
  height: 40px;
  background: var(--border-subtle);
}
.flow-content {
  padding-bottom: 1.5rem;
  flex: 1;
}
.flow-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.flow-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* --- Highlight box --- */
.highlight-box {
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.08), rgba(0, 212, 170, 0.05));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2rem 0;
}
.highlight-box .highlight-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 0.75rem;
}
.highlight-box p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .topology-grid { grid-template-columns: 1fr; }
  .template-grid { grid-template-columns: 1fr; }
  .install-methods { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 5rem 1.5rem; }
}

@media (max-width: 768px) {
  /* Nav */
  .nav-inner { padding: 0 1rem; height: 56px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    padding: 1rem 1.5rem;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
    z-index: 999;
  }
  .nav-toggle { display: block; }

  /* Hero */
  .hero { padding: 4.5rem 1rem 3rem; }
  .hero-tagline { font-size: clamp(0.95rem, 3.5vw, 1.3rem); margin: 0.75rem auto 1.5rem; }
  .hero-badges { gap: 0.4rem; }
  .badge { font-size: 0.72rem; padding: 0.28rem 0.6rem; }
  .hero-cta { gap: 0.75rem; }
  .btn { padding: 0.65rem 1.25rem; font-size: 0.875rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 2.5rem; }
  .stat-value { font-size: 1.5rem; }

  /* Sections */
  .section { padding: 3.5rem 1.25rem; }
  .section-header { margin-bottom: 2.5rem; }

  /* Grids */
  .card-grid-2,
  .card-grid-3,
  .card-grid-4 { grid-template-columns: 1fr; }
  .belbin-grid { grid-template-columns: repeat(2, 1fr); }
  .antipattern-grid { grid-template-columns: 1fr; }

  /* Topology */
  .topology-header { flex-direction: column; align-items: flex-start; gap: 0.25rem; }

  /* Tables */
  table { font-size: 0.8rem; }
  th { padding: 0.65rem 0.75rem; font-size: 0.72rem; }
  td { padding: 0.6rem 0.75rem; }

  /* ASCII diagrams */
  .ascii-block { padding: 1rem; }
  .ascii-block pre { font-size: 0.65rem; }

  /* Code blocks */
  .code-body { padding: 1rem; }
  .code-body pre { font-size: 0.78rem; }

  /* Templates */
  .template-meta { flex-wrap: wrap; gap: 0.4rem; }
  .agent-name { min-width: 80px; }

  /* Misc */
  .highlight-box { padding: 1.5rem; }
  .install-card { padding: 1.25rem; }
  .roadmap { padding-left: 1.5rem; }
  .subcommand-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  /* Nav */
  .nav-inner { padding: 0 0.75rem; }

  /* Hero */
  .hero { padding: 4rem 0.75rem 2.5rem; }
  .hero-byline { font-size: 0.75rem; }

  /* Sections */
  .section { padding: 2.5rem 0.75rem; }
  .section-header { margin-bottom: 2rem; }

  /* Grids */
  .belbin-grid { grid-template-columns: 1fr; }

  /* ASCII diagrams — wrap for very narrow screens */
  .ascii-block pre { font-size: 0.5rem; white-space: pre; }

  /* Misc */
  .highlight-box { padding: 1.25rem; }
  .roadmap-item { padding: 1rem 0 1rem 1.5rem; }
  .footer-links { gap: 0.75rem; flex-wrap: wrap; }
  .card { padding: 1.5rem; }
}

@media (max-width: 380px) {
  /* Hero — collapse to single column */
  .hero-stats { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { text-align: center; justify-content: center; }
  .stat-value { font-size: 1.3rem; }

  /* Footer */
  .footer-links { flex-direction: column; align-items: center; gap: 0.75rem; }
}