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

:root {
  /* Neutrals (dark shell; bg rgb used for translucent nav) */
  --color-bg: #0d1117;
  --color-bg-rgb: 13 17 23;
  --color-surface: #161b22;
  --color-surface-2: #1c2128;
  --color-border: #30363d;
  --color-text: #e6edf3;
  --color-text-rgb: 230 237 243;
  /* Logo mauve #7A6977, lifted for WCAG on --color-bg */
  --color-muted: #a39aa8;

  /* 99x logo (99xlogo.svg) — semantic accents */
  --color-primary: #c49fd5;
  --color-primary-rgb: 196 159 213;
  --color-primary-dim: rgb(var(--color-primary-rgb) / 0.12);
  --color-purple: var(--color-primary);
  /* #A2B372 olive circles */
  --color-green: #a2b372;
  --color-green-rgb: 162 179 114;
  /* #B44B4B accent */
  --color-red: #b44b4b;
  --color-red-rgb: 180 75 75;
  /* #BC8E58 bronze legs */
  --color-orange: #bc8e58;
  --color-orange-rgb: 188 142 88;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --radius: 8px;
  --radius-lg: 12px;
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
}

/* ─────────────────────────────────────────
   Nav
───────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 60px;
  background: rgb(var(--color-bg-rgb) / 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-logo { text-decoration: none; }

.logo-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
}

.logo-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.3px;
  line-height: 1;
}

.logo-name-accent {
  color: var(--color-primary);
}

.by-99x-container {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  width: 100%;
  margin-top: 4px;
}

.by-99x {
  font-size: 0.65rem;
  color: var(--color-muted);
  font-weight: 400;
  line-height: 1;
}

.logo-99x {
  height: 12px;
  width: auto;
  opacity: 0.75;
  filter: brightness(1.4);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}

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

.nav-github {
  display: flex !important;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.25rem 0.65rem !important;
  transition: border-color 0.2s, color 0.2s !important;
}

.nav-github:hover {
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
}

.nav-github svg {
  width: 0.9rem;
  height: 0.9rem;
  stroke-width: 2;
  flex-shrink: 0;
}

/* ─────────────────────────────────────────
   Hero
───────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 5rem;
  gap: 1.5rem;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgb(var(--color-primary-rgb) / 0.08) 0%, transparent 70%);
}

.hero-badge {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  max-width: 760px;
}

.hero h1 span { color: var(--color-primary); }

.hero > p {
  color: var(--color-muted);
  font-size: 1.15rem;
  max-width: 580px;
}

.hero > p strong { color: var(--color-text); }

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 0.5rem;
}

.hero-meta .dot { opacity: 0.4; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
}

.btn:hover { opacity: 0.85; transform: translateY(-1px); }

.btn-primary { background: var(--color-primary); color: var(--color-bg); border: none; }
.btn-outline  { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }

/* ─────────────────────────────────────────
   Generic section shell
───────────────────────────────────────── */
.section { padding: 5rem 1.5rem; }
.section-alt { background: var(--color-surface); }

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--color-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin-bottom: 3rem;
}

.section-subtitle a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.section-subtitle a:hover {
  color: var(--color-text);
}

.agent-flow-intro,
.agent-flow-note {
  color: var(--color-muted);
  font-size: 0.95rem;
  max-width: 860px;
}

.agent-flow-intro {
  margin: -1.5rem 0 1rem;
}

.agent-flow-note {
  margin: 1rem 0 2rem;
}

.handoff-flow {
  display: flex;
  align-items: stretch;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.handoff-step {
  min-width: 150px;
  flex: 1 1 150px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.handoff-role {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text);
}

.handoff-artifact {
  font-size: 0.8rem;
  color: var(--color-primary);
}

.handoff-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 1.1rem;
  font-weight: 700;
  min-width: 20px;
}

.hero-diagram {
  margin: 0 auto 4rem;
  max-width: 1000px;
  width: 100%;
  display: flex;
  justify-content: center;
}

.hero-diagram img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

/* ─────────────────────────────────────────
   Principles
───────────────────────────────────────── */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1.5rem;
}

.principle-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition: border-color 0.2s;
}

.principle-card:hover { border-color: var(--color-primary); }

.principle-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary-dim);
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 1rem;
}

.principle-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.principle-card p {
  color: var(--color-muted);
  font-size: 0.9rem;
}

/* ─────────────────────────────────────────
   SDLC Pipeline
───────────────────────────────────────── */
.pipeline {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 1rem 0 2rem;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.pipeline::-webkit-scrollbar { display: none; }

.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  min-width: 90px;
  flex: 1;
}

.pipeline-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  transition: border-color 0.2s, background 0.2s;
}

.pipeline-icon svg { width: 1.3rem; height: 1.3rem; color: var(--color-primary); }

.pipeline-step:hover .pipeline-icon {
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
}

.pipeline-step[data-phase="grooming"] .pipeline-icon {
  border-color: var(--color-green);
}

.pipeline-label {
  font-size: 0.7rem;
  color: var(--color-muted);
  text-align: center;
  font-weight: 500;
}

.pipeline-agent {
  font-size: 0.72rem;
  color: var(--color-primary);
  text-align: center;
  font-weight: 600;
  line-height: 1.3;
}

.pipeline-step[data-phase="grooming"] .pipeline-agent { color: var(--color-green); }

.pipeline-arrow {
  color: var(--color-border);
  font-size: 1.4rem;
  flex-shrink: 0;
  padding: 0 0.25rem;
  margin-bottom: 1.8rem;
}

.pipeline-legend {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.legend-item {
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-item::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-agent::before  { background: var(--color-primary); }
.legend-human::before  { background: var(--color-green); }

/* ─────────────────────────────────────────
   Agent Cards
───────────────────────────────────────── */
.agent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 1.5rem;
}

.agent-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color 0.2s, transform 0.15s;
}

.agent-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.agent-card[open] {
  border-color: var(--color-primary);
  grid-column: 1 / -1;
}

.agent-summary {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  cursor: pointer;
  list-style: none;
}

.agent-summary::-webkit-details-marker {
  display: none;
}

.agent-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.agent-icon { font-size: 2rem; line-height: 1; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.agent-icon svg { width: 2rem; height: 2rem; color: var(--color-primary); }

.agent-phase-tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.agent-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.agent-trigger {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.agent-trigger strong { color: var(--color-text); }

.agent-preview {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.55;
}

.agent-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  align-self: flex-start;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgb(var(--color-primary-rgb) / 0.08);
}

.agent-toggle::after {
  content: '↓';
  font-size: 0.75rem;
}

.agent-card[open] .agent-toggle::after {
  content: '↑';
}

.agent-card[open] .agent-toggle {
  color: var(--color-text);
  border-color: rgb(var(--color-primary-rgb) / 0.35);
}

.agent-card[open] .agent-toggle::before {
  content: 'Hide details';
}

.agent-card[open] .agent-toggle {
  font-size: 0;
}

.agent-card[open] .agent-toggle::after,
.agent-card[open] .agent-toggle::before {
  font-size: 0.78rem;
}

.agent-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgb(var(--color-primary-rgb) / 0.16);
}

.agent-trigger-box {
  background: rgb(var(--color-text-rgb) / 0.03);
  border-color: rgb(var(--color-text-rgb) / 0.12);
}

.agent-trigger-box .output-label {
  color: var(--color-text);
}

.agent-capabilities {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.agent-capabilities li {
  font-size: 0.875rem;
  color: var(--color-muted);
  padding-left: 1.1rem;
  position: relative;
}

.agent-capabilities li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.agent-output {
  background: rgb(var(--color-primary-rgb) / 0.06);
  border: 1px solid rgb(var(--color-primary-rgb) / 0.2);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.output-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.3rem;
}

.agent-human {
  background: rgb(var(--color-green-rgb) / 0.06);
  border: 1px solid rgb(var(--color-green-rgb) / 0.2);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.human-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-green);
  margin-bottom: 0.3rem;
}

.human-label svg { width: 0.85rem; height: 0.85rem; flex-shrink: 0; }

/* ─────────────────────────────────────────
   Extended agents
───────────────────────────────────────── */
.ext-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 1.25rem;
}

.ext-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.ext-card:hover { border-color: var(--color-primary); }

.ext-icon { font-size: 1.6rem; display: block; margin-bottom: 0.75rem; }
.ext-icon svg { width: 1.75rem; height: 1.75rem; color: var(--color-purple); }

.ext-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.ext-card p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.ext-phase {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-purple);
  border: 1px solid rgb(var(--color-primary-rgb) / 0.25);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}

/* ─────────────────────────────────────────
   Ping-pong / Day in the life
───────────────────────────────────────── */
.pingpong {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Lane headers */
.pp-headers {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  margin-bottom: 1.25rem;
  gap: 0;
}

.pp-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pp-header-human {
  background: rgb(var(--color-green-rgb) / 0.1);
  border: 1px solid rgb(var(--color-green-rgb) / 0.25);
  color: var(--color-green);
  justify-content: center;
}

.pp-header-ai {
  background: rgb(var(--color-primary-rgb) / 0.1);
  border: 1px solid rgb(var(--color-primary-rgb) / 0.25);
  color: var(--color-primary);
  justify-content: center;
}

.pp-header-mid { /* centre gap */ }

.pp-header-icon { font-size: 1rem; display: flex; align-items: center; }
.pp-header-icon svg { width: 1.1rem; height: 1.1rem; stroke-width: 2; }

/* Rows */
.pp-row {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  align-items: center;
  margin-bottom: 0.75rem;
  min-height: 60px;
}

.pp-spacer { /* empty side */ }

/* Bubbles */
.pp-bubble {
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.875rem;
  transition: transform 0.15s;
}

.pp-bubble:hover { transform: translateY(-1px); }

.pp-bubble p { color: var(--color-muted); margin: 0; line-height: 1.55; }
.pp-bubble p strong { color: var(--color-text); }
.pp-bubble p em { color: var(--color-text); font-style: italic; }

.pp-bubble code {
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: rgba(0,0,0,0.25);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

.pp-bubble-human {
  background: rgb(var(--color-green-rgb) / 0.07);
  border: 1px solid rgb(var(--color-green-rgb) / 0.2);
}

.pp-bubble-ai {
  background: rgb(var(--color-primary-rgb) / 0.07);
  border: 1px solid rgb(var(--color-primary-rgb) / 0.2);
}

.pp-time {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
}

.pp-actor {
  font-size: 0.82rem;
  font-weight: 700;
}

.pp-from-human .pp-actor { color: var(--color-green); }
.pp-from-ai    .pp-actor { color: var(--color-primary); }

/* Connector (centre column) */
.pp-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  height: 100%;
  justify-content: center;
  gap: 4px;
}

.pp-line {
  width: 1px;
  flex: 1;
  background: var(--color-border);
  min-height: 12px;
}

.pp-arrow {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  flex-shrink: 0;
}

.pp-from-human .pp-arrow { color: var(--color-green); }
.pp-from-ai    .pp-arrow { color: var(--color-primary); }

/* Mobile: stack to single-lane chat */
@media (max-width: 768px) {
  .pp-headers { display: none; }

  .pp-row {
    display: block;
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    border-left: 2px solid var(--color-border);
    position: relative;
  }

  .pp-from-human { border-left-color: var(--color-green); }
  .pp-from-ai    { border-left-color: var(--color-primary); }

  .pp-connector, .pp-spacer { display: none; }

  .pp-bubble { padding: 0.9rem 1rem; }
}

/* ─────────────────────────────────────────
   Pricing
───────────────────────────────────────── */
.pricing-wrap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 1.5rem;
  align-items: stretch;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 2rem 1.75rem;
  transition: border-color 0.2s;
  overflow: hidden;
}

.pricing-card:hover { border-color: var(--color-primary); }

.pricing-card-head {
  text-align: left;
  padding-bottom: 1.5rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.pricing-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.pricing-amount {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: flex-start;
  gap: 0.35rem 0.5rem;
}

.pricing-price {
  font-size: clamp(1.85rem, 4vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--color-text);
  font-family: var(--font-mono);
}

.pricing-period {
  font-size: 1rem;
  color: var(--color-muted);
}

.pricing-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  line-height: 1.25;
}

.pricing-card-lead {
  font-size: 0.92rem;
  color: var(--color-muted);
  line-height: 1.55;
  margin: 0;
}

.pricing-card .pricing-card-footer {
  margin-top: 2rem;
  margin-left: -2rem;
  margin-right: -2rem;
  margin-bottom: -1.75rem;
  padding: 1.35rem 2rem 1.75rem;
  border-top: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.15);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.pricing-card .pricing-cta {
  display: block;
  width: 100%;
  text-align: center;
  padding: 0.75rem 1.25rem;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pricing-features li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 0.92rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.pricing-features strong { color: var(--color-text); }

.pricing-check {
  flex-shrink: 0;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.1rem;
}

.pricing-check svg {
  width: 0.75rem;
  height: 0.75rem;
  color: var(--color-primary);
  stroke-width: 2.5;
}

/* ─────────────────────────────────────────
   Metrics
───────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: 1.25rem;
}

.metric-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: border-color 0.2s;
}

.metric-card:hover { border-color: var(--color-primary); }

.metric-icon { font-size: 2rem; margin-bottom: 0.75rem; display: flex; align-items: center; justify-content: center; }
.metric-icon svg { width: 2.25rem; height: 2.25rem; color: var(--color-primary); }

.metric-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.metric-card p {
  font-size: 0.83rem;
  color: var(--color-muted);
}

/* ─────────────────────────────────────────
   What this is not
───────────────────────────────────────── */
.not-this { background: var(--color-bg); }

.not-this-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.not-this-inner .section-title { margin-bottom: 2.5rem; }
.not-this-inner .section-title em { color: var(--color-red); font-style: normal; }

.not-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: left;
}

.not-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.not-item strong { color: var(--color-text); }

.not-x {
  color: var(--color-red);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
  display: flex;
  align-items: center;
}

.not-x svg { width: 1rem; height: 1rem; }

/* ─────────────────────────────────────────
   Redesign the Machine
───────────────────────────────────────── */
.redesign-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

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

.redesign-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.redesign-card img {
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--color-border);
}

.redesign-content {
  padding: 1.5rem;
}

.redesign-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.redesign-content p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* ─────────────────────────────────────────
   CTA
───────────────────────────────────────── */
.cta-section {
  padding: 5rem 1.5rem;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 50% 100%, rgb(var(--color-primary-rgb) / 0.08) 0%, transparent 70%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.cta-section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  max-width: 560px;
}

.cta-section p {
  color: var(--color-muted);
  font-size: 1.05rem;
}

/* ─────────────────────────────────────────
   Footer
───────────────────────────────────────── */
footer {
  text-align: center;
  padding: 2rem 1rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.85rem;
}

footer a { color: var(--color-primary); text-decoration: none; }

/* ─────────────────────────────────────────
   Responsive Base
───────────────────────────────────────── */
@media (max-width: 850px) {
  nav {
    flex-direction: column;
    height: auto;
    padding: 0.75rem 1.25rem;
    gap: 0.75rem;
  }
  .nav-logo { align-self: flex-start; }
  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links li { flex-shrink: 0; }
  
  .hero { padding: 4rem 1.25rem 3rem; }
  .hero h1 { font-size: clamp(2.2rem, 8vw, 3.2rem); }
  
  .section { padding: 3.5rem 1.25rem; }
  .cta-section { padding: 3.5rem 1.25rem; }
  .section-title { margin-bottom: 1.25rem; }

  .agent-grid { grid-template-columns: 1fr; }
  .handoff-arrow { display: none; }
  .redesign-grid { gap: 1.5rem; }
  .transform-block { margin-bottom: 2.5rem; }
}

/* ─────────────────────────────────────────
   Agile → AI-DLC Transformation
───────────────────────────────────────── */
.transform-block {
  margin-bottom: 3.5rem;
}

.transform-block:last-child { margin-bottom: 0; }

.transform-heading {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.transform-icon { font-size: 1.2rem; display: inline-flex; align-items: center; }
.transform-icon svg { width: 1.2rem; height: 1.2rem; color: var(--color-primary); }

.transform-intro {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  max-width: 680px;
}

.transform-intro em { color: var(--color-primary); font-style: normal; font-weight: 600; }

/* Vocabulary cards */
.vocab-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 1rem;
}

.vocab-card {
  display: grid;
  grid-template-columns: 1fr 44px 1fr;
  align-items: stretch;
  border: 2px solid rgb(var(--color-text-rgb) / 0.2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.15s;
  text-decoration: none;
}

.vocab-card:hover { 
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.vocab-side {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.25rem 1.25rem 1.25rem 1.25rem;
}

.vocab-side-old {
  background: rgb(var(--color-red-rgb) / 0.04);
  border-right: 1px solid rgb(var(--color-text-rgb) / 0.14);
}

.vocab-side-new {
  background: rgb(var(--color-primary-rgb) / 0.05);
  border-left: 1px solid rgb(var(--color-text-rgb) / 0.14);
}

.vocab-badge {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  width: fit-content;
}

.vocab-badge-old {
  background: rgb(var(--color-red-rgb) / 0.12);
  color: var(--color-red);
  border: 1px solid rgb(var(--color-red-rgb) / 0.25);
}

.vocab-badge-new {
  background: rgb(var(--color-primary-rgb) / 0.12);
  color: var(--color-primary);
  border: 1px solid rgb(var(--color-primary-rgb) / 0.25);
}

.vocab-term-old {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-muted);
  opacity: 0.6;
}

.vocab-term-old s {
  text-decoration-color: var(--color-muted);
}

.vocab-term-new {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
}

.vocab-side p {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.4;
}

.vocab-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-2);
}

.vocab-divider-arrow {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.7;
  text-shadow: 0 0 12px rgb(var(--color-primary-rgb) / 0.4);
}

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

  .vocab-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .vocab-side-old { border-right: none; border-bottom: 1px solid rgb(var(--color-text-rgb) / 0.14); }
  .vocab-side-new { border-left: none; border-top: 1px solid rgb(var(--color-text-rgb) / 0.14); }

  .vocab-divider { padding: 0.5rem; }
  .vocab-divider-arrow { transform: rotate(90deg); }
}

/* Loss function — two columns (AI | Human); single grid so each row aligns across columns */
.lf-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.lf-col-head {
  padding: 0.65rem 1rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
  background: var(--color-bg);
}

.lf-col-head-ai   { color: var(--color-primary); }
.lf-col-head-gate { color: var(--color-orange); }

.lf-cell,
.lf-gate {
  padding: 1.1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
  justify-content: flex-start;
}

.lf-cell-ai {
  background: var(--color-bg);
  box-shadow: inset 3px 0 0 0 rgb(var(--color-primary-rgb) / 0.45);
}

.lf-gate {
  background: var(--color-bg);
  box-shadow: inset 3px 0 0 0 rgb(var(--color-orange-rgb) / 0.5);
}

.lf-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
}

.lf-cell p,
.lf-gate p {
  font-size: 0.82rem;
  color: var(--color-text);
  opacity: 0.82;
  margin: 0;
  line-height: 1.5;
}

.lf-gate-chip {
  display: inline-block;
  width: fit-content;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: rgb(var(--color-orange-rgb) / 0.15);
  border: 1px solid rgb(var(--color-orange-rgb) / 0.35);
  color: var(--color-orange);
  margin-bottom: 0.25rem;
}

@media (max-width: 768px) {
  .lf-two-col {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    background: transparent;
    border: none;
    border-radius: 0;
  }

  .lf-col-head,
  .lf-cell,
  .lf-gate {
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
  }

  .lf-cell,
  .lf-gate {
    min-height: 0;
  }
}

/* Three-phase loop */
.phase-loop {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}

.phase-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 1.25rem;
  align-items: start;
  transition: border-color 0.2s;
}

.phase-card:hover { border-color: var(--color-primary); }

.phase-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary-dim);
  font-family: var(--font-mono);
  line-height: 1.1;
  padding-top: 0.1rem;
}

.phase-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.phase-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.phase-card p strong { color: var(--color-text); }

.phase-connector {
  display: flex;
  justify-content: center;
  padding: 0.25rem 0;
}

.phase-arrow {
  font-size: 1.4rem;
  color: var(--color-border);
}

@media (max-width: 640px) {
  .vocab-row, .vocab-header {
    grid-template-columns: 1fr 28px 1fr;
    padding: 0.75rem;
  }

  .phase-card { grid-template-columns: 1fr; }
  .phase-num { font-size: 1.4rem; }
}

/* ─────────────────────────────────────────
   Inline Lucide icon sizing — global rules
───────────────────────────────────────── */

/* Base: all inline SVGs align to text */
i[data-lucide] { display: inline-flex; align-items: center; }
i[data-lucide] svg { display: inline-block; vertical-align: middle; stroke-width: 1.75; }

/* Transform section heading icons */
.transform-icon svg   { width: 1.1rem; height: 1.1rem; stroke-width: 2; }

/* Vocab term icons */
.vocab-term-old svg,
.vocab-term-new svg {
  width: 1.05rem;
  height: 1.05rem;
  margin-right: 3px;
  stroke-width: 2;
}

/* LF table — column heads, labels, chips */
.lf-col-head svg {
  width: 0.9rem;
  height: 0.9rem;
  margin-right: 4px;
  stroke-width: 2;
}
.lf-label svg {
  width: 0.85rem;
  height: 0.85rem;
  margin-right: 4px;
  stroke-width: 2;
}
.lf-gate-chip svg {
  width: 0.8rem;
  height: 0.8rem;
  margin-right: 3px;
  stroke-width: 2;
}

/* Agent cards */
.agent-icon svg      { width: 1.75rem; height: 1.75rem; stroke-width: 1.75; }
.human-label svg     { width: 0.85rem; height: 0.85rem; stroke-width: 2; margin-right: 3px; }

/* Extended agent cards */
.ext-icon svg        { width: 1.5rem;  height: 1.5rem;  stroke-width: 1.75; }

/* Metrics */
.metric-icon svg     { width: 2rem;    height: 2rem;    stroke-width: 1.5;  }

/* "Not this" X icons */
.not-x svg           { width: 1rem;    height: 1rem;    stroke-width: 2.5; color: var(--color-red); }