/* ── GitHub Primer-inspired tokens ── */
:root {
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --canvas-default: #0d1117;
  --canvas-subtle: #010409;
  --canvas-overlay: #161b22;
  --canvas-inset: #010409;
  --border-default: #30363d;
  --border-muted: #21262d;
  --fg-default: #f0f6fc;
  --fg-muted: #8b949e;
  --fg-subtle: #6e7681;
  --accent-fg: #58a6ff;
  --accent-emphasis: #1f6feb;
  --success-fg: #3fb950;
  --success-emphasis: #238636;
  --success-muted: rgba(46, 160, 67, 0.15);
  --purple-fg: #bc8cff;
  --purple-muted: rgba(188, 140, 255, 0.12);
  --danger-fg: #f85149;
  --attention-fg: #d29922;
  --shadow: 0 8px 24px rgba(1, 4, 9, 0.5);
  --shadow-lg: 0 16px 48px rgba(1, 4, 9, 0.65);
  --radius: 12px;
  --radius-lg: 16px;
  --header-h: 64px;
  --max-w: 1200px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --slime-core: #56d364;
  --slime-glow: #3fb950;
  --slime-tube: rgba(86, 211, 100, 0.55);
  --slime-pulse: rgba(63, 185, 80, 0.25);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 24px); }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
    }

body {
  font-family: var(--font-sans);
  background: var(--canvas-default);
  color: var(--fg-default);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Animated mesh background ── */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(31, 111, 235, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(46, 160, 67, 0.12), transparent),
    radial-gradient(ellipse 50% 30% at 0% 100%, rgba(188, 140, 255, 0.08), transparent),
    var(--canvas-default);
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(48, 54, 61, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(48, 54, 61, 0.4) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 20%, transparent 70%);
  animation: gridDrift 40s linear infinite;
}

@keyframes gridDrift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(64px, 64px); }
}

.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
  animation: orbFloat 20s ease-in-out infinite;
}
.orb-1 { width: 400px; height: 400px; background: rgba(31, 111, 235, 0.15); top: -100px; right: -100px; }
.orb-2 { width: 300px; height: 300px; background: rgba(46, 160, 67, 0.12); bottom: 20%; left: -80px; animation-delay: -7s; }
.orb-3 { width: 250px; height: 250px; background: rgba(188, 140, 255, 0.1); top: 40%; right: 10%; animation-delay: -14s; }

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 30px) scale(0.95); }
}

/* ── Header ── */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-muted);
  background: #0d1117;
  box-shadow: 0 1px 0 rgba(63, 185, 80, 0.06);
  isolation: isolate;
  transform: translateZ(0);
}

.header-inner {
  width: min(var(--max-w), 100% - 48px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

.logo {
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg-default);
  font-weight: 700;
  font-size: 1.05rem;
}

header nav {
  justify-self: center;
}

.header-actions {
  justify-self: end;
  display: flex;
  gap: 8px;
  align-items: center;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(13, 17, 23, 0.9);
  border: 1px solid rgba(63, 185, 80, 0.4);
  display: grid;
  place-items: center;
  box-shadow: 0 0 16px rgba(63, 185, 80, 0.25);
  overflow: hidden;
  position: relative;
}

.logo-icon canvas {
  width: 100%;
  height: 100%;
  display: block;
}

nav ul {
  display: flex;
  gap: 4px;
  list-style: none;
}

nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

nav a:hover { color: var(--fg-default); background: var(--canvas-overlay); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: var(--success-emphasis);
  color: #fff;
  border-color: rgba(240, 246, 252, 0.1);
  box-shadow: 0 1px 0 rgba(255,255,255,0.08) inset;
}
.btn-primary:hover {
  background: #2ea043;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(46, 160, 67, 0.35);
}

.btn-secondary {
  background: var(--canvas-overlay);
  color: var(--fg-default);
  border-color: var(--border-default);
}
.btn-secondary:hover {
  border-color: var(--fg-subtle);
  background: #21262d;
}

.btn-ghost {
  background: transparent;
  color: var(--fg-muted);
  border-color: var(--border-default);
}
.btn-ghost:hover { color: var(--fg-default); border-color: var(--fg-subtle); }

/* ── Layout ── */
main { padding-bottom: 80px; }
section {
  padding: 96px 24px;
}

section:not(.hero) {
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}
.container { width: min(var(--max-w), 100%); margin: 0 auto; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--success-fg);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--success-fg);
  border-radius: 1px;
}

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 800; margin-bottom: 16px; }
h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 8px; }

.lead {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 640px;
}

/* ── Reveal animations ── */
.reveal {
  opacity: 0;
  transition: opacity 0.32s var(--ease-out);
  will-change: opacity;
}

.reveal.visible {
  opacity: 1;
}

.reveal.revealed {
  will-change: auto;
  transition: none;
}

.reveal-delay-1 { transition-delay: 0.04s; }
.reveal-delay-2 { transition-delay: 0.08s; }
.reveal-delay-3 { transition-delay: 0.12s; }

/* Pause decorative motion while scrolling — keeps scroll smooth */
body.is-scrolling .bg-grid,
body.is-scrolling .orb,
body.is-scrolling .slime-panel,
body.is-scrolling .graph-tube,
body.is-scrolling .graph-node,
body.is-scrolling .fold-marker,
body.is-scrolling .mini-code .folded,
body.is-scrolling .hero-slime-tag svg,
body.is-scrolling .pipeline-tubes path,
body.is-scrolling .phase-connector::after {
  animation-play-state: paused !important;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transition: none;
    will-change: auto;
  }

  .bg-grid,
  .orb,
  .slime-panel,
  .graph-tube,
  .fold-marker,
  .hero-slime-tag svg {
    animation: none !important;
  }
}

/* ── Slime hero banner ── */
.hero {
  position: relative;
  display: grid;
  grid-template-areas: "hero-main";
  padding: 0 0 64px;
  min-height: calc(100dvh - var(--header-h));
  text-align: center;
  overflow: hidden;
  content-visibility: visible;
  contain-intrinsic-size: auto;
}

.hero-slime-wrap {
  grid-area: hero-main;
  position: relative;
  width: 100%;
  height: 100%;
  min-height: inherit;
  margin-bottom: 0;
  z-index: 0;
}

#slime-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.hero-slime-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, var(--canvas-default) 0%, rgba(13, 17, 23, 0.92) 18%, rgba(13, 17, 23, 0.55) 52%, rgba(13, 17, 23, 0.82) 78%, var(--canvas-default) 100%),
    radial-gradient(ellipse 55% 45% at 50% 42%, transparent 0%, rgba(13, 17, 23, 0.45) 100%);
  pointer-events: none;
}

.hero-slime-panels {
  position: absolute;
  inset: auto 0 0;
  top: 42%;
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  align-items: end;
  gap: 12px;
  padding: 0 clamp(12px, 4vw, 48px) clamp(20px, 4vh, 48px);
  pointer-events: none;
  z-index: 2;
}

@media (max-width: 900px) {
  .hero-slime-panels {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    top: 48%;
    gap: 8px;
    padding-bottom: 16px;
    opacity: 0.72;
  }
}

.slime-panel {
  background: rgba(13, 17, 23, 0.72);
  border: 1px solid rgba(63, 185, 80, 0.35);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 14px 16px;
  text-align: left;
  box-shadow: 0 0 30px rgba(63, 185, 80, 0.08), inset 0 1px 0 rgba(255,255,255,0.04);
  animation: panelFloat 6s ease-in-out infinite;
  pointer-events: auto;
  max-width: 280px;
  justify-self: center;
}

.slime-panel:nth-child(1) { animation-delay: 0s; justify-self: start; }
.slime-panel:nth-child(2) { animation-delay: -2s; justify-self: center; max-width: 300px; }
.slime-panel:nth-child(3) { animation-delay: -4s; justify-self: end; }

@media (max-width: 900px) {
  .slime-panel, .slime-panel:nth-child(n) { justify-self: center; max-width: 92%; }
}

@keyframes panelFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.slime-panel-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--slime-glow);
  margin-bottom: 10px;
}

.slime-panel-label .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--slime-core);
  box-shadow: 0 0 10px var(--slime-core);
  animation: pulse 2s ease infinite;
}

/* Graph mini viz */
.mini-graph {
  position: relative;
  height: 88px;
}

.mini-graph svg { width: 100%; height: 100%; }

.graph-node {
  fill: var(--canvas-overlay);
  stroke: var(--slime-glow);
  stroke-width: 1.5;
  animation: nodePulse 3s ease-in-out infinite;
}

.graph-node.seed { fill: rgba(63, 185, 80, 0.2); stroke: var(--slime-core); stroke-width: 2; }

@keyframes nodePulse {
  0%, 100% { filter: drop-shadow(0 0 2px rgba(63,185,80,0.3)); }
  50% { filter: drop-shadow(0 0 8px rgba(86,211,100,0.7)); }
}

.graph-tube {
  fill: none;
  stroke: url(#tubeGrad);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  animation: tubeGrow 4s ease-in-out infinite;
}

.graph-tube.t2 { animation-delay: 0.8s; }
.graph-tube.t3 { animation-delay: 1.6s; }

@keyframes tubeGrow {
  0% { stroke-dashoffset: 120; opacity: 0.3; }
  40%, 70% { stroke-dashoffset: 0; opacity: 1; }
  100% { stroke-dashoffset: -40; opacity: 0.5; }
}

/* Code mini viz */
.mini-code {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  line-height: 1.65;
  color: var(--fg-muted);
}

.mini-code .expressed { color: #d2a8ff; }
.mini-code .folded {
  display: block;
  color: var(--attention-fg);
  background: rgba(210, 153, 34, 0.12);
  border-left: 2px solid var(--attention-fg);
  padding: 2px 6px;
  margin: 4px 0;
  border-radius: 0 4px 4px 0;
  animation: foldShrink 5s ease-in-out infinite;
}

@keyframes foldShrink {
  0%, 30% { max-height: 60px; opacity: 1; }
  50%, 80% { max-height: 18px; opacity: 0.85; overflow: hidden; }
  100% { max-height: 60px; opacity: 1; }
}

/* Engine mini viz */
.mini-engine {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.engine-step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.6875rem;
  color: var(--fg-muted);
  opacity: 0.45;
  transition: opacity 0.4s, color 0.4s;
}

.engine-step.active {
  opacity: 1;
  color: var(--fg-default);
}

.engine-step.active .engine-bar {
  background: linear-gradient(90deg, var(--slime-emphasis, var(--success-emphasis)), var(--slime-core));
  box-shadow: 0 0 12px rgba(63, 185, 80, 0.4);
}

.engine-bar {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--border-default);
  overflow: hidden;
  position: relative;
}

.engine-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transform: translateX(-100%);
  animation: shimmer 2s ease infinite;
}

.engine-step.active .engine-bar::after { animation-play-state: running; }

@keyframes shimmer {
  100% { transform: translateX(100%); }
}

.engine-tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--slime-glow);
  min-width: 72px;
}

.hero-content {
  grid-area: hero-main;
  position: relative;
  z-index: 3;
  align-self: start;
  width: 100%;
  padding: clamp(28px, 5vh, 56px) 24px 0;
  pointer-events: none;
}

.hero-content .container,
.hero-content a,
.hero-content button {
  pointer-events: auto;
}

.hero-headline {
  filter: drop-shadow(0 4px 28px rgba(13, 17, 23, 0.85));
  margin-bottom: 20px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px 12px;
  margin-bottom: 28px;
}

.hero-slime-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--slime-core);
  background: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.3);
  margin-bottom: 0;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hero-slime-tag svg { animation: wobble 4s ease-in-out infinite; }

@keyframes wobble {
  0%, 100% { transform: rotate(0deg) scale(1); }
  25% { transform: rotate(-8deg) scale(1.05); }
  75% { transform: rotate(8deg) scale(0.95); }
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border-default);
  background: var(--canvas-overlay);
  color: var(--fg-muted);
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}
.badge:hover { border-color: var(--fg-subtle); transform: translateY(-1px); }
.badge-dot { width: 8px; height: 8px; border-radius: 50%; }
.badge-dot.green { background: var(--success-fg); box-shadow: 0 0 8px var(--success-fg); animation: pulse 2s ease infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  font-size: clamp(2.75rem, 8vw, 5rem);
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 0%, var(--fg-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(1.125rem, 3vw, 1.625rem);
  color: var(--accent-fg);
  font-weight: 600;
  margin-bottom: 0;
  min-height: 1.5em;
}

.hero-tagline .cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent-fg);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  font-size: 1.125rem;
  color: var(--fg-muted);
  max-width: 720px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-desc strong { color: var(--fg-default); font-weight: 600; }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}

.hero-clients {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
  font-size: 0.8125rem;
  color: var(--fg-subtle);
}

.hero-clients span { color: var(--fg-muted); }

/* ── DNA fold visual ── */
.fold-demo {
  max-width: 720px;
  margin: 0 auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--canvas-overlay);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.fold-demo-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--canvas-inset);
  border-bottom: 1px solid var(--border-muted);
  font-size: 0.8125rem;
  color: var(--fg-muted);
}

.window-dots { display: flex; gap: 6px; }
.window-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border-default);
}
.window-dots span:nth-child(1) { background: #f85149; }
.window-dots span:nth-child(2) { background: #d29922; }
.window-dots span:nth-child(3) { background: #3fb950; }

.fold-demo-body {
  padding: 20px 24px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.8;
  text-align: left;
}

.code-line { display: block; opacity: 0; transform: translateX(-8px); }
.code-line.visible { animation: codeIn 0.4s var(--ease-out) forwards; }

@keyframes codeIn {
  to { opacity: 1; transform: translateX(0); }
}

.kw { color: #ff7b72; }
.fn { color: #d2a8ff; }
.str { color: #a5d6ff; }
.cm { color: var(--fg-subtle); }
.fold-marker {
  color: var(--attention-fg);
  background: rgba(210, 153, 34, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  border-left: 3px solid var(--attention-fg);
  display: inline-block;
  animation: foldPulse 3s ease-in-out infinite;
}

@keyframes foldPulse {
  0%, 100% { box-shadow: 0 0 0 rgba(210, 153, 34, 0); }
  50% { box-shadow: 0 0 16px rgba(210, 153, 34, 0.2); }
}

/* ── Cards grid ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.card {
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.25s, transform 0.25s var(--ease-out), box-shadow 0.25s;
}

.card:hover {
  border-color: var(--fg-subtle);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.card p { color: var(--fg-muted); font-size: 0.9375rem; }

.card-problem { border-left: 3px solid var(--danger-fg); }
.card-problem .card-icon { background: rgba(248, 81, 73, 0.12); }

/* ── Comparison table ── */
.table-wrap {
  overflow-x: auto;
  margin-top: 32px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  background: var(--canvas-overlay);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

th, td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-muted);
}

th {
  background: var(--canvas-inset);
  color: var(--fg-muted);
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

/* ── Nature mapping ── */
.nature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 12px;
  margin-top: 40px;
}

.nature-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  align-items: start;
  transition: border-color 0.2s;
}

.nature-item:hover { border-color: var(--success-fg); }

.nature-emoji {
  font-size: 1.75rem;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--success-muted);
  border-radius: 12px;
}

.nature-item h4 { font-size: 0.9375rem; font-weight: 600; margin-bottom: 4px; }
.nature-item .engine { color: var(--accent-fg); font-size: 0.8125rem; font-weight: 500; }
.nature-item p { color: var(--fg-muted); font-size: 0.875rem; margin-top: 6px; }

/* ── Gallery ── */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.gallery-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-default);
  background: var(--canvas-overlay);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s, border-color 0.3s;
}

.gallery-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--slime-glow);
}

.gallery-thumb {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  cursor: zoom-in;
  position: relative;
  font: inherit;
  color: inherit;
}

.gallery-thumb::after {
  content: '⤢';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(13, 17, 23, 0.75);
  border: 1px solid var(--border-default);
  color: var(--fg-muted);
  display: grid;
  place-items: center;
  font-size: 1rem;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.25s, transform 0.25s var(--ease-out), border-color 0.25s;
  backdrop-filter: blur(6px);
}

.gallery-item:hover .gallery-thumb::after {
  opacity: 1;
  transform: scale(1);
  border-color: var(--slime-glow);
  color: var(--slime-core);
}

.gallery-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease-out);
}

.gallery-item:hover img { transform: scale(1.05); }

.gallery-caption {
  padding: 14px 16px;
  font-size: 0.8125rem;
  color: var(--fg-muted);
  border-top: 1px solid var(--border-muted);
}

/* ── Lightbox ── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(1, 4, 9, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--ease-out), visibility 0.35s;
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox-inner {
  position: relative;
  max-width: min(1100px, 100%);
  max-height: calc(100vh - 80px);
  transform: scale(0.92);
  transition: transform 0.4s var(--ease-out);
}

.lightbox.open .lightbox-inner { transform: scale(1); }

.lightbox-img {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 120px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-lg);
  object-fit: contain;
}

.lightbox-caption {
  text-align: center;
  margin-top: 16px;
  color: var(--fg-muted);
  font-size: 0.9375rem;
}

.lightbox-close,
.lightbox-nav {
  position: absolute;
  border: 1px solid var(--border-default);
  background: rgba(22, 27, 34, 0.9);
  color: var(--fg-default);
  cursor: pointer;
  border-radius: 10px;
  display: grid;
  place-items: center;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
  font-family: inherit;
}

.lightbox-close:hover,
.lightbox-nav:hover {
  border-color: var(--slime-glow);
  background: rgba(63, 185, 80, 0.15);
}

.lightbox-close {
  top: -48px;
  right: 0;
  width: 40px;
  height: 40px;
  font-size: 1.5rem;
  line-height: 1;
}

.lightbox-nav {
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  font-size: 1.25rem;
}

.lightbox-nav.prev { left: -56px; }
.lightbox-nav.next { right: -56px; }

@media (max-width: 768px) {
  .lightbox-nav.prev { left: 8px; }
  .lightbox-nav.next { right: 8px; }
  .lightbox-close { top: 8px; right: 8px; }
}

/* ── Flow pipeline ── */
.pipeline-board {
  margin-top: 48px;
  position: relative;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 4vw, 36px);
  overflow: hidden;
  text-align: left;
}

.pipeline-board::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(31, 111, 235, 0.06), transparent),
    radial-gradient(ellipse 50% 40% at 80% 70%, rgba(63, 185, 80, 0.08), transparent);
  pointer-events: none;
}

.pipeline-progress-bar {
  position: relative;
  height: 4px;
  background: var(--border-muted);
  border-radius: 2px;
  margin-bottom: 32px;
  overflow: hidden;
}

.pipeline-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-emphasis), var(--slime-core), var(--purple-fg));
  border-radius: 2px;
  transition: width 0.6s var(--ease-out);
  box-shadow: 0 0 12px rgba(63, 185, 80, 0.5);
}

.pipeline-phases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(12px, 2vw, 24px);
  position: relative;
  z-index: 1;
}

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

.pipeline-phase {
  background: rgba(13, 17, 23, 0.6);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  padding: 20px 16px 16px;
  position: relative;
  transition: border-color 0.4s, box-shadow 0.4s;
}

.pipeline-phase.active {
  border-color: rgba(63, 185, 80, 0.5);
  box-shadow: 0 0 32px rgba(63, 185, 80, 0.08);
}

.pipeline-phase.phase-read { --phase-color: var(--accent-fg); --phase-bg: rgba(31, 111, 235, 0.1); }
.pipeline-phase.phase-route { --phase-color: var(--slime-glow); --phase-bg: rgba(63, 185, 80, 0.1); }
.pipeline-phase.phase-splice { --phase-color: var(--purple-fg); --phase-bg: rgba(188, 140, 255, 0.1); }

.phase-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-muted);
}

.phase-num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--phase-bg);
  color: var(--phase-color);
  font-size: 0.75rem;
  font-weight: 800;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.phase-title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--phase-color);
}

.phase-sub {
  font-size: 0.6875rem;
  color: var(--fg-subtle);
  margin-top: 1px;
}

.phase-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pipe-node {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
  width: 100%;
  transition: background 0.2s, border-color 0.2s, transform 0.2s var(--ease-out), opacity 0.25s var(--ease-out);
  opacity: 0;
}

.pipe-node.visible {
  opacity: 1;
}

.pipe-node:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-default);
}

.pipe-node.active {
  background: var(--phase-bg);
  border-color: var(--phase-color);
  transform: translateX(4px);
  box-shadow: 0 0 20px rgba(63, 185, 80, 0.1);
}

.pipe-node.done .pipe-node-icon {
  background: rgba(63, 185, 80, 0.2);
  border-color: var(--slime-glow);
}

.pipe-node-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--canvas-inset);
  border: 1px solid var(--border-default);
  display: grid;
  place-items: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}

.pipe-node.active .pipe-node-icon {
  border-color: var(--phase-color);
  box-shadow: 0 0 16px rgba(63, 185, 80, 0.25);
  transform: scale(1.08);
}

.pipe-node-body { flex: 1; min-width: 0; }

.pipe-node-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg-default);
  line-height: 1.3;
}

.pipe-node-key {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--fg-subtle);
  margin-top: 2px;
}

.phase-connector {
  display: none;
}

@media (min-width: 901px) {
  .phase-connector {
    display: flex;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: clamp(16px, 2vw, 28px);
    height: 2px;
    background: linear-gradient(90deg, var(--slime-glow), transparent);
    z-index: 2;
    pointer-events: none;
  }

  .phase-connector::after {
    content: '▶';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.5rem;
    color: var(--slime-glow);
    animation: connPulse 2s ease infinite;
  }

  .phase-connector.c1 { left: calc(33.33% - 14px); }
  .phase-connector.c2 { left: calc(66.66% - 14px); }
}

@keyframes connPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* Slime tube SVG between phases */
.pipeline-tubes {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

.pipeline-tubes path {
  fill: none;
  stroke: url(#pipeTubeGrad);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 8 6;
  animation: tubeFlow 1.2s linear infinite;
}

@keyframes tubeFlow {
  to { stroke-dashoffset: -14; }
}

/* Detail panel */
.pipeline-detail {
  margin-top: 24px;
  padding: 20px 24px;
  background: var(--canvas-inset);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  position: relative;
  z-index: 1;
  min-height: 88px;
  transition: border-color 0.4s;
}

.pipeline-detail.active-read { border-color: rgba(88, 166, 255, 0.4); }
.pipeline-detail.active-route { border-color: rgba(63, 185, 80, 0.4); }
.pipeline-detail.active-splice { border-color: rgba(188, 140, 255, 0.4); }

.detail-step-badge {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  background: var(--success-muted);
  border: 1px solid var(--border-default);
  transition: all 0.4s;
}

.pipeline-detail.active-read .detail-step-badge { background: rgba(31, 111, 235, 0.15); border-color: var(--accent-fg); }
.pipeline-detail.active-route .detail-step-badge { background: var(--success-muted); border-color: var(--slime-glow); }
.pipeline-detail.active-splice .detail-step-badge { background: var(--purple-muted); border-color: var(--purple-fg); }

.detail-text h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--fg-default);
}

.detail-text p {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.55;
  margin: 0;
}

.detail-counter {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-subtle);
  text-align: right;
  white-space: nowrap;
}

.detail-counter strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--slime-glow);
  line-height: 1.2;
}

.pipeline-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 20px;
  position: relative;
  z-index: 1;
}

.pipeline-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-default);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
}

.pipeline-dot.active {
  background: var(--slime-core);
  transform: scale(1.3);
  box-shadow: 0 0 10px var(--slime-core);
}

.pipeline-dot.done { background: var(--success-emphasis); }

.pipeline-play-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 16px auto 0;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-default);
  background: var(--canvas-inset);
  color: var(--fg-muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
  position: relative;
  z-index: 1;
}

.pipeline-play-toggle:hover {
  border-color: var(--slime-glow);
  color: var(--fg-default);
}

.pipeline-play-toggle.paused { color: var(--slime-glow); border-color: rgba(63, 185, 80, 0.4); }

/* ── Modes ── */
.mode-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}

@media (max-width: 768px) {
  .mode-cards { grid-template-columns: 1fr; }
  .header-inner {
    grid-template-columns: 1fr auto;
  }
  header nav { display: none; }
  .header-actions { justify-self: end; }
  .hero-meta {
    flex-direction: column;
    gap: 10px;
  }
  .hero-slime-panels .slime-panel:nth-child(1),
  .hero-slime-panels .slime-panel:nth-child(3) {
    display: none;
  }
}

.mode-card {
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border-default);
  background: var(--canvas-overlay);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.mode-card.featured {
  border-color: var(--success-fg);
  background: linear-gradient(180deg, var(--success-muted) 0%, var(--canvas-overlay) 100%);
}

.mode-card .tag {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--success-emphasis);
  color: #fff;
}

.mode-card .tokens {
  font-size: 2rem;
  font-weight: 800;
  color: var(--success-fg);
  margin: 12px 0 4px;
}

.mode-card .tokens small { font-size: 0.875rem; font-weight: 500; color: var(--fg-muted); }

/* ── Install tabs ── */
.tabs {
  display: flex;
  gap: 4px;
  margin-top: 32px;
  border-bottom: 1px solid var(--border-muted);
  padding-bottom: 0;
}

.tab-btn {
  padding: 10px 20px;
  background: none;
  border: none;
  color: var(--fg-muted);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s, border-color 0.2s;
}

.tab-btn:hover { color: var(--fg-default); }
.tab-btn.active {
  color: var(--fg-default);
  border-bottom-color: var(--accent-fg);
}

.tab-panel { display: none; margin-top: 16px; }
.tab-panel.active { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.code-block {
  position: relative;
  background: var(--canvas-inset);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--canvas-overlay);
  border-bottom: 1px solid var(--border-muted);
  font-size: 0.75rem;
  color: var(--fg-subtle);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-default);
  background: var(--canvas-default);
  color: var(--fg-muted);
  font-size: 0.75rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover { color: var(--fg-default); border-color: var(--fg-subtle); }
.copy-btn.copied { color: var(--success-fg); border-color: var(--success-fg); }

.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--fg-default);
}

/* ── Stats counter ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.stat-box {
  text-align: center;
  padding: 28px 16px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--success-fg), var(--accent-fg));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  margin-top: 4px;
}

/* ── Tools grid ── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.tool-item {
  padding: 16px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  transition: border-color 0.2s, background 0.2s;
}

.tool-item:hover {
  border-color: var(--purple-fg);
  background: var(--purple-muted);
}

.tool-name {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--purple-fg);
  font-weight: 500;
  margin-bottom: 6px;
}

.tool-desc { font-size: 0.8125rem; color: var(--fg-muted); }

/* ── Clients grid ── */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
  margin-top: 24px;
}

.client-chip {
  padding: 10px 14px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  font-size: 0.8125rem;
  color: var(--fg-muted);
  transition: border-color 0.2s;
}

.client-chip:hover { border-color: var(--accent-fg); color: var(--fg-default); }
.client-chip code { font-family: var(--font-mono); font-size: 0.75rem; color: var(--fg-subtle); }

.connect-note {
  margin-top: 20px;
  font-size: 0.875rem;
  color: var(--fg-muted);
  text-align: center;
}

.connect-note code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-fg);
}

/* ── Docs links ── */
.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.doc-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--fg-default);
  transition: all 0.25s var(--ease-out);
}

.doc-link:hover {
  border-color: var(--accent-fg);
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.doc-link span:first-child { font-size: 1.25rem; }
.doc-link .doc-title { font-weight: 600; font-size: 0.9375rem; }
.doc-link .doc-sub { font-size: 0.8125rem; color: var(--fg-muted); }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border-muted);
  padding: 48px 24px;
  text-align: center;
  color: var(--fg-subtle);
  font-size: 0.875rem;
}

footer a { color: var(--accent-fg); text-decoration: none; }
footer a:hover { text-decoration: underline; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

/* ── Quote block ── */
.quote {
  margin-top: 32px;
  padding: 24px 28px;
  border-left: 4px solid var(--success-fg);
  background: var(--success-muted);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.0625rem;
  color: var(--fg-muted);
  font-style: italic;
}

.quote strong { color: var(--fg-default); font-style: normal; }

/* ── Adaptive learning section ── */
.learning-section {
  background: linear-gradient(180deg, transparent, rgba(188, 140, 255, 0.04) 40%, transparent);
  overflow: hidden;
}

.learning-stage {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(16px, 3vw, 28px);
  margin-top: 40px;
  align-items: stretch;
}

@media (max-width: 960px) {
  .learning-stage { grid-template-columns: 1fr; }
}

.learning-viz-wrap {
  position: relative;
  min-height: 380px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--canvas-inset);
  overflow: hidden;
  box-shadow: var(--shadow-lg), inset 0 0 60px rgba(188, 140, 255, 0.04);
}

#learning-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.learning-viz-overlay {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 20px 24px;
  background: linear-gradient(180deg, transparent, rgba(13, 17, 23, 0.92) 40%);
  pointer-events: none;
  z-index: 2;
}

.learning-turn-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--fg-muted);
  background: rgba(13, 17, 23, 0.8);
  border: 1px solid rgba(188, 140, 255, 0.35);
  margin-bottom: 8px;
}

.learning-turn-pill strong {
  color: var(--purple-fg);
  font-size: 1rem;
}

.learning-turn-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--purple-fg);
  box-shadow: 0 0 12px var(--purple-fg);
  animation: pulse 2s ease infinite;
}

.learning-turn-caption {
  font-size: 0.9375rem;
  color: var(--fg-muted);
  margin: 0;
  max-width: 420px;
  transition: opacity 0.4s;
}

.learning-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.learning-loop {
  flex: 1;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  padding: 20px;
}

.learning-loop-title {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-subtle);
  margin-bottom: 16px;
}

.learning-loop-steps {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.loop-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: background 0.35s, border-color 0.35s, transform 0.35s var(--ease-out);
  opacity: 0.55;
}

.loop-step.active {
  opacity: 1;
  background: rgba(188, 140, 255, 0.08);
  border-color: rgba(188, 140, 255, 0.35);
  transform: translateX(4px);
}

.loop-step-highlight.active {
  background: rgba(63, 185, 80, 0.12);
  border-color: rgba(63, 185, 80, 0.45);
  box-shadow: 0 0 24px rgba(63, 185, 80, 0.12);
}

.loop-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--canvas-inset);
  border: 1px solid var(--border-muted);
  display: grid;
  place-items: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.loop-step strong {
  display: block;
  font-size: 0.875rem;
  color: var(--fg-default);
}

.loop-step span {
  font-size: 0.75rem;
  color: var(--fg-subtle);
}

.loop-arrow {
  text-align: center;
  color: var(--fg-subtle);
  font-size: 0.75rem;
  line-height: 1;
  padding: 2px 0;
}

.learning-metrics {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
}

.learning-metric-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.8125rem;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.learning-metric-head strong {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--purple-fg);
  transition: color 0.4s;
}

.learning-metric-bar {
  height: 6px;
  border-radius: 3px;
  background: var(--border-muted);
  overflow: hidden;
}

.learning-metric-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--purple-fg), #d2a8ff);
  transition: width 0.8s var(--ease-out);
  box-shadow: 0 0 12px rgba(188, 140, 255, 0.4);
}

.learning-metric-fill.recall {
  background: linear-gradient(90deg, var(--success-emphasis), var(--slime-core));
  box-shadow: 0 0 12px rgba(63, 185, 80, 0.35);
}

.learning-metric-fill.grep {
  background: linear-gradient(90deg, var(--attention-fg), #f85149);
  box-shadow: 0 0 12px rgba(248, 81, 73, 0.25);
}

.learning-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}

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

.learning-card {
  padding: 24px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  transition: border-color 0.3s, transform 0.3s var(--ease-out);
}

.learning-card:hover {
  transform: translateY(-3px);
  border-color: var(--fg-subtle);
}

.learning-card.featured {
  border-color: rgba(188, 140, 255, 0.45);
  background: linear-gradient(180deg, var(--purple-muted) 0%, var(--canvas-overlay) 100%);
}

.learning-card-icon {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.learning-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.learning-card p {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

.learning-card em {
  color: var(--fg-default);
  font-style: normal;
  font-weight: 500;
}

.learning-quote {
  margin-top: 32px;
  padding: 20px 24px;
  border-left: 4px solid var(--purple-fg);
  background: var(--purple-muted);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.9375rem;
  color: var(--fg-muted);
}

.learning-quote strong { color: var(--fg-default); }
.learning-quote code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--purple-fg);
}

/* ── Language dropdown ── */
.lang-dropdown {
  position: relative;
}

.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  min-width: 108px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--fg-default);
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.lang-trigger:hover,
.lang-dropdown.open .lang-trigger {
  border-color: var(--fg-subtle);
  background: #21262d;
}

.lang-dropdown.open .lang-trigger {
  box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.12);
}

.lang-trigger-icon {
  color: var(--fg-muted);
  flex-shrink: 0;
}

.lang-trigger-label {
  flex: 1;
  text-align: start;
  white-space: nowrap;
}

.lang-trigger-chevron {
  color: var(--fg-muted);
  flex-shrink: 0;
  transition: transform 0.2s var(--ease-out);
}

.lang-dropdown.open .lang-trigger-chevron {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  inset-inline-end: 0;
  min-width: 100%;
  margin: 0;
  padding: 4px;
  list-style: none;
  background: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  animation: langMenuIn 0.16s var(--ease-out);
}

.lang-menu[hidden] {
  display: none;
}

@keyframes langMenuIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.lang-option {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 8px 10px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--fg-muted);
  background: transparent;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  text-align: start;
  transition: color 0.15s, background 0.15s;
}

.lang-option:hover {
  color: var(--fg-default);
  background: rgba(255, 255, 255, 0.04);
}

.lang-option.active {
  color: var(--fg-default);
  background: rgba(63, 185, 80, 0.12);
  font-weight: 600;
}

.lang-option-name {
  flex: 1;
}

.lang-option[data-lang="fa"] .lang-option-name {
  font-family: var(--font-fa);
}

/* ── Persian / RTL ── */
:root {
  --font-fa: "Vazirmatn", "Segoe UI", Tahoma, "Noto Sans Arabic", sans-serif;
}

html[dir="rtl"],
body.lang-fa {
  --font-sans: var(--font-fa);
}

html[dir="rtl"] body,
body.lang-fa {
  font-family: var(--font-fa);
  font-feature-settings: "ss01" on;
  letter-spacing: 0;
  line-height: 1.85;
}

body.lang-fa .lang-trigger-label,
body.lang-fa .lang-option[data-lang="fa"] .lang-option-name {
  font-family: var(--font-fa);
}

html[dir="rtl"] .header-inner nav ul {
  flex-direction: row-reverse;
}

html[dir="rtl"] .logo {
  justify-self: end;
}

html[dir="rtl"] .header-actions {
  justify-self: start;
}

html[dir="rtl"] .doc-link:hover {
  transform: translateX(-4px);
}

html[dir="rtl"] .pipe-node.active {
  transform: translateX(-4px);
}

html[dir="rtl"] .detail-counter {
  text-align: left;
}

html[dir="rtl"] .section-label::before {
  order: 1;
}

html[dir="rtl"] .learning-quote {
  border-left: none;
  border-right: 4px solid var(--purple-fg);
  border-radius: var(--radius) 0 0 var(--radius);
}

html[dir="rtl"] .phase-connector::after {
  transform: scaleX(-1);
}

html[dir="rtl"] .code-block pre,
html[dir="rtl"] .code-block code,
html[dir="rtl"] .mini-code,
html[dir="rtl"] .fold-demo pre,
html[dir="rtl"] .fold-demo .code-line {
  direction: ltr;
  text-align: left;
  unicode-bidi: isolate;
}

html[dir="rtl"] .stat-value,
html[dir="rtl"] .detail-counter strong,
html[dir="rtl"] .learning-metric-value {
  font-variant-numeric: tabular-nums;
}

@media (max-width: 900px) {
  html[dir="rtl"] .header-actions {
    flex-direction: row-reverse;
  }
}