/* Landing Page */

html {
  scroll-behavior: smooth;
}

body {
  background: #eaf6f5;
}

[data-theme="dark"] body {
  background: #33353b;
}


/* ========================================
   LANDING NAV
   ======================================== */

.landing-nav,
[data-theme="dark"] .landing-nav {
  position: fixed;
  width: 100%;
  z-index: 300;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: none;
}

.landing-nav .top-nav-inner {
  gap: var(--space-4);
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  margin-right: auto;
}

.nav-logo {
  width: 28px;
  height: 28px;
  filter: drop-shadow(0 3px 0 rgba(160, 140, 170, 0.35));
}

[data-theme="dark"] .nav-logo {
  filter: none;
}

.landing-nav .nav-links {
  gap: var(--space-5);
}

.landing-nav .nav-actions {
  gap: var(--space-2);
  margin-left: var(--space-4);
}

.landing-nav .nav-link {
  color: color-mix(in srgb, var(--text) 82%, var(--tone-dark-grey));
}

.landing-nav .nav-link:hover {
  color: var(--text);
}

.landing-nav .btn-ghost {
  color: color-mix(in srgb, var(--text) 80%, var(--tone-dark-grey));
}

.landing-nav .btn-ghost:hover {
  color: var(--text);
}

[data-theme="dark"] .landing-nav .nav-link {
  color: rgba(255, 255, 255, 0.84);
}

[data-theme="dark"] .landing-nav .nav-link:hover {
  color: #fff;
}

[data-theme="dark"] .landing-nav .btn-ghost {
  color: rgba(255, 255, 255, 0.84);
}

[data-theme="dark"] .landing-nav .btn-ghost:hover {
  color: #fff;
}

/* ========================================
   HERO
   ======================================== */

.hero {
  --hero-bg-base: #eaf6f5;
  --hero-text: #2f2a3a;
  --hero-text-soft: rgba(47, 42, 58, 0.82);
  --hero-line: rgba(47, 42, 58, 0.35);
  --hero-line-active: #c8b4ff;
  --hero-title-color: #2f2a3a;
  --hero-title-bottom-shadow: 0 6px 0 rgba(183, 169, 187, 0.28);
  --hero-title-gradient: linear-gradient(112deg, #e399c2 0%, #daa8d2 42%, #7fb3e3 72%, #43acf6 100%);
  --hero-btn-primary-bg: #f2c9e6;
  --hero-btn-primary-fg: #ffffff;
  --hero-btn-primary-border: rgba(255, 255, 255, 0.44);
  --hero-btn-primary-hover-bg: #33353b;
  --hero-btn-primary-hover-border: rgba(215, 215, 215, 0.58);
  --hero-btn-secondary-border: rgba(47, 42, 58, 0.4);
  --hero-btn-secondary-hover-bg: rgba(47, 42, 58, 0.08);
  min-height: 120vh;
  margin-top: -56px;
  padding-top: 56px;
  display: flex;
  align-items: center;
  background-color: var(--hero-bg-base);
  transition: background-color 400ms ease;
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .hero {
  --hero-bg-base: #33353b;
  --hero-text: #f8f7f2;
  --hero-text-soft: rgba(248, 247, 242, 0.82);
  --hero-line: rgba(248, 247, 242, 0.46);
  --hero-line-active: #f3e28a;
  --hero-title-color: #2f2a3a;
  --hero-title-bottom-shadow: 0 6px 0 rgba(170, 157, 182, 0.24);
  --hero-btn-primary-bg: #f2c9e6;
  --hero-btn-primary-fg: #2f2a3a;
  --hero-btn-primary-border: rgba(201, 182, 255, 0.6);
  --hero-btn-primary-hover-bg: #ffffff;
  --hero-btn-primary-hover-border: rgba(249, 230, 151, 0.76);
  --hero-btn-secondary-border: rgba(255, 255, 255, 0.38);
  --hero-btn-secondary-hover-bg: rgba(255, 255, 255, 0.1);
}

/* Fade canvas into solid hero bg at bottom */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent, var(--hero-bg-base));
  z-index: 2;
  pointer-events: none;
}

/* Braille ASCII art background layer */
.hero-ascii {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%) scaleX(0.85);
  z-index: 1;
  pointer-events: none;
  user-select: none;
  margin: 0;
  padding: 0;
  white-space: pre;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 6px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: rgba(47, 42, 58, 0.8);
  opacity: 0;
  animation: asciiArtFadeIn 0.6s ease 0.2s forwards;
  -webkit-mask-image:
    linear-gradient(to left, black 40%, transparent 100%),
    linear-gradient(to top, transparent 0%, black 30%);
  -webkit-mask-composite: destination-in;
  mask-image:
    linear-gradient(to left, black 40%, transparent 100%),
    linear-gradient(to top, transparent 0%, black 30%);
  mask-composite: intersect;
}

[data-theme="dark"] .hero-ascii {
  color: rgba(248, 247, 242, 0.8);
}

@keyframes asciiArtFadeIn {
  to { opacity: 1; }
}

/* Slow gentle drift */
@media (prefers-reduced-motion: no-preference) {
  .hero-ascii {
    animation:
      asciiArtFadeIn 0.6s ease 0.2s forwards,
      asciiDrift 40s ease-in-out infinite;
  }
}

@keyframes asciiDrift {
  0%, 100% {
    transform: translateY(-50%) scaleX(0.85);
  }
  50% {
    transform: translateY(calc(-50% - 12px)) scaleX(0.85);
  }
}

/* Gradient canvas */
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  filter: blur(100px);
  transform: scale(1.15);
  transform-origin: center;
  will-change: transform;
  opacity: 0;
  animation: canvasFadeIn 1.8s ease 0.1s forwards;
}

@keyframes canvasFadeIn {
  to {
    opacity: 1;
  }
}

/* Particle overlay */
.hero-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  animation: canvasFadeIn 2.5s ease 0.6s forwards;
}

.hero-content {
  max-width: 900px;
  padding: var(--space-16) 0;
  position: relative;
  z-index: 3;
}

.hero-title {
  display: inline-block;
  font-size: clamp(3rem, 7.5vw, 5.5rem);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -0.035em;
  margin-bottom: var(--space-10);
  color: var(--hero-title-color);
}

.hero-punct {
  display: inline-block;
  color: var(--hero-title-color);
}

.hero-and {
  display: inline-block;
  color: var(--hero-title-color);
}

.hero-tagline {
  display: inline-block;
  color: var(--hero-title-color);
}

/* Interactive hero words */
.hero-word {
  text-decoration: none;
  color: var(--hero-title-color);
  position: relative;
  display: inline-block;
}

.hero-word-text {
  position: relative;
  display: inline-block;
  font-size: 1.08em;
  color: var(--hero-title-color);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.4);
  text-underline-offset: 4px;
  transition: text-decoration-color 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero-title .hero-word-text,
  .hero-title .hero-punct,
  .hero-title .hero-and,
  .hero-title .hero-tagline {
    background-image: var(--hero-title-gradient);
    background-repeat: no-repeat;
    background-size: 100vw 100vh;
    background-position: 0 0;
    background-attachment: fixed;
    -webkit-background-clip: text;
    background-clip: text;
    text-shadow: var(--hero-title-bottom-shadow);
    color: var(--hero-title-color);
    -webkit-text-fill-color: transparent;
  }
}

.hero-word-label {
  position: absolute;
  left: 0;
  top: 100%;
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--hero-text-soft);
  opacity: 0;
  transform: translateY(-4px);
  transition: all 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  white-space: nowrap;
  pointer-events: none;
}

.hero-word:hover .hero-word-text {
  text-decoration-color: rgba(255, 255, 255, 0.7);
}

.hero-word:hover .hero-word-label {
  opacity: 1;
  transform: translateY(2px);
}

/* Hero buttons on colored background */
.hero .btn-primary {
  background: var(--hero-btn-primary-bg);
  color: var(--hero-btn-primary-fg);
  border-color: var(--hero-btn-primary-bg);
}

.hero .btn.btn-primary.btn-lg.press-feedback {
  color: #2f2a3a;
  box-shadow: var(--hero-title-bottom-shadow);
}

.hero .btn.btn-primary.btn-lg.press-feedback:hover {
  background: #ffffff;
  color: #2f2a3a !important;
  border-color: #ffffff;
}

.hero .btn-primary:hover {
  background: var(--hero-btn-primary-hover-bg);
  border-color: var(--hero-btn-primary-hover-bg);
}

.hero .btn-secondary {
  background: transparent;
  border-color: var(--hero-btn-secondary-border);
  color: var(--hero-text);
}

.hero .btn-secondary:hover {
  background: var(--hero-btn-secondary-hover-bg);
  border-color: var(--hero-text-soft);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ========================================
   SCROLL REVEAL
   ======================================== */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.features-grid .reveal:nth-child(2) {
  transition-delay: 0.1s;
}

.features-grid .reveal:nth-child(3) {
  transition-delay: 0.18s;
}

.features-grid .reveal:nth-child(4) {
  transition-delay: 0.1s;
}

.features-grid .reveal:nth-child(5) {
  transition-delay: 0.18s;
}

/* ========================================
   FEATURE CARDS
   ======================================== */

.features {
  padding: var(--space-20) 0;
  padding-top: 120px;
  background-color: #eaf6f5;
  transition: background-color 400ms ease;
}

[data-theme="dark"] .features {
  background-color: #33353b;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  max-width: 1080px;
  margin: 0 auto;
}

.feature-card {
  background: color-mix(in srgb, var(--bg-secondary) 92%, var(--bg));
  border-radius: 24px;
  overflow: hidden;
  transition: box-shadow 400ms ease;
}

[data-theme="dark"] .feature-card {
  background: color-mix(in srgb, var(--bg-secondary) 88%, #1f2229);
}

.feature-card:hover {
  box-shadow: 0 2px 20px rgba(30, 20, 10, 0.06);
}

[data-theme="dark"] .feature-card:hover {
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
}


/* Visual panel — generous sizing */
.feature-card-visual {
  padding: var(--space-8) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
}

.feature-card-body {
  padding: 0 var(--space-8) var(--space-4);
}

.feature-card-body h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
  color: var(--text);
}

.feature-card-agenda {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--brand);
  margin-bottom: var(--space-2);
  line-height: 1.5;
}

.feature-card-brief {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

[data-theme="dark"] .feature-card-agenda {
  color: var(--tone-plain-white);
}

[data-theme="dark"] .feature-card-brief {
  color: var(--tone-off-white);
}

/* Clickable cards */
.feature-card[data-modal] {
  cursor: pointer;
  position: relative;
}

/* ----------------------------------------
   Feature visual: Flow Runtime
   ---------------------------------------- */

.fv-flow {
  display: flex;
  align-items: center;
  width: 100%;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
}

.fv-node {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  border-radius: 12px;
  padding: 10px 14px;
  white-space: nowrap;
  position: relative;
  transition: filter 300ms ease;
}

.fv-node--green { background: #0f8f67; }
.fv-node--blue { background: #2da6be; }
.fv-node--purple { background: #978caf; }
.fv-node--amber { background: #bc7708; }

[data-theme="dark"] .fv-node--green { background: #0c7a58; }
[data-theme="dark"] .fv-node--blue { background: #247f93; }
[data-theme="dark"] .fv-node--purple { background: #7f7598; }
[data-theme="dark"] .fv-node--amber { background: #966008; }

.fv-node-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  position: absolute;
  top: 12px;
  right: 12px;
}

.fv-node-label {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  line-height: 1;
}

.fv-node-type {
  font-size: 10px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.02em;
  font-family: var(--font-mono);
}

.fv-edge {
  width: 20px;
  height: 2px;
  background: var(--border-strong);
  flex-shrink: 0;
  position: relative;
}

.fv-edge-tip {
  position: absolute;
  right: -1px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid var(--border-strong);
  border-top: 3.5px solid transparent;
  border-bottom: 3.5px solid transparent;
}

/* ----------------------------------------
   Feature visual: Eval
   ---------------------------------------- */

.fv-eval {
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
  max-width: 420px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 400ms ease;
}

.feature-card:hover .fv-eval {
  border-color: var(--border-strong);
}

/* macOS-style title bar */
.fv-eval-head,
.fv-deploy-bar {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  position: relative;
  background: var(--bg);
}

.fv-eval-dots {
  display: flex;
  gap: 7px;
}

.fv-eval-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  opacity: 0;
  transform: scale(0);
  transition: opacity 300ms ease, transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-eval-dots span {
  opacity: 1;
  transform: scale(1);
}

.revealed .fv-eval-dots span:nth-child(1) {
  transition-delay: 0.05s;
}

.revealed .fv-eval-dots span:nth-child(2) {
  transition-delay: 0.1s;
}

.revealed .fv-eval-dots span:nth-child(3) {
  transition-delay: 0.15s;
}

.fv-eval-dots span:nth-child(1) {
  background: #ff5f57;
}

.fv-eval-dots span:nth-child(2) {
  background: #febc2e;
}

.fv-eval-dots span:nth-child(3) {
  background: #28c840;
}

.fv-eval-bartitle {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

.fv-eval-row {
  display: grid;
  grid-template-columns: 22px 1fr minmax(60px, auto) 48px;
  gap: 10px;
  align-items: center;
  padding: 10px 18px;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity 400ms ease, transform 400ms cubic-bezier(0.16, 1, 0.3, 1), background 200ms ease;
}

.fv-eval-row:last-child {
  border-bottom: none;
}

.fv-eval-row:hover {
  background: var(--bg-secondary);
}

.revealed .fv-eval-row {
  opacity: 1;
  transform: translateX(0);
}

.revealed .fv-eval-row:nth-child(2) {
  transition-delay: 0.15s;
}

.revealed .fv-eval-row:nth-child(3) {
  transition-delay: 0.25s;
}

.revealed .fv-eval-row:nth-child(4) {
  transition-delay: 0.35s;
}

.revealed .fv-eval-row:nth-child(5) {
  transition-delay: 0.45s;
}

.fv-eval-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0);
  transition: opacity 300ms ease, transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-eval-icon {
  opacity: 1;
  transform: scale(1);
}

.revealed .fv-eval-row:nth-child(2) .fv-eval-icon {
  transition-delay: 0.35s;
}

.revealed .fv-eval-row:nth-child(3) .fv-eval-icon {
  transition-delay: 0.45s;
}

.revealed .fv-eval-row:nth-child(4) .fv-eval-icon {
  transition-delay: 0.55s;
}

.revealed .fv-eval-row:nth-child(5) .fv-eval-icon {
  transition-delay: 0.65s;
}

.fv-eval-row--pass .fv-eval-icon {
  color: var(--brand);
}

.fv-eval-row--fail .fv-eval-icon {
  color: var(--red);
}

.fv-eval-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.fv-eval-progress {
  height: 5px;
  border-radius: 3px;
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-eval-progress {
  transform: scaleX(1);
}

.revealed .fv-eval-row:nth-child(2) .fv-eval-progress {
  transition-delay: 0.3s;
}

.revealed .fv-eval-row:nth-child(3) .fv-eval-progress {
  transition-delay: 0.4s;
}

.revealed .fv-eval-row:nth-child(4) .fv-eval-progress {
  transition-delay: 0.5s;
}

.revealed .fv-eval-row:nth-child(5) .fv-eval-progress {
  transition-delay: 0.6s;
}

.fv-eval-bar--pass {
  background: var(--brand);
}

.fv-eval-bar--fail {
  background: var(--red);
  width: 40%;
}

.fv-eval-time {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-align: right;
  opacity: 0;
  transition: opacity 300ms ease;
}

.revealed .fv-eval-time {
  opacity: 1;
}

.revealed .fv-eval-row:nth-child(2) .fv-eval-time {
  transition-delay: 0.5s;
}

.revealed .fv-eval-row:nth-child(3) .fv-eval-time {
  transition-delay: 0.6s;
}

.revealed .fv-eval-row:nth-child(4) .fv-eval-time {
  transition-delay: 0.7s;
}

.revealed .fv-eval-row:nth-child(5) .fv-eval-time {
  transition-delay: 0.8s;
}

/* ----------------------------------------
   Feature visual: Deploy
   ---------------------------------------- */

.fv-deploy {
  width: 100%;
  max-width: 420px;
}

.fv-deploy-window {
  background: var(--bg);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: border-color 400ms ease;
}

.feature-card:hover .fv-deploy-window {
  border-color: var(--border-strong);
}

.fv-deploy-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

.fv-deploy-dots {
  display: flex;
  gap: 7px;
}

.fv-deploy-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  opacity: 0;
  transform: scale(0);
  transition: opacity 300ms ease, transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-deploy-dots span {
  opacity: 1;
  transform: scale(1);
}

.revealed .fv-deploy-dots span:nth-child(1) {
  transition-delay: 0.05s;
}

.revealed .fv-deploy-dots span:nth-child(2) {
  transition-delay: 0.1s;
}

.revealed .fv-deploy-dots span:nth-child(3) {
  transition-delay: 0.15s;
}

.fv-deploy-dots span:nth-child(1) {
  background: #ff5f57;
}

.fv-deploy-dots span:nth-child(2) {
  background: #febc2e;
}

.fv-deploy-dots span:nth-child(3) {
  background: #28c840;
}

.fv-deploy-lines {
  padding: 16px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fv-deploy-line {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 400ms ease, transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-deploy-line {
  opacity: 1;
  transform: translateY(0);
}

.revealed .fv-deploy-line:nth-child(1) {
  transition-delay: 0.2s;
}

.revealed .fv-deploy-line:nth-child(2) {
  transition-delay: 0.5s;
}

.revealed .fv-deploy-line:nth-child(3) {
  transition-delay: 0.8s;
}

.revealed .fv-deploy-line:nth-child(4) {
  transition-delay: 1.1s;
}

.revealed .fv-deploy-line:nth-child(5) {
  transition-delay: 1.4s;
}

.revealed .fv-deploy-line:nth-child(6) {
  transition-delay: 1.7s;
}

.fv-deploy-prompt {
  color: var(--brand);
  user-select: none;
}

.fv-deploy-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: var(--brand);
  vertical-align: middle;
  opacity: 0;
}

.revealed .fv-deploy-cursor {
  animation: termBlink 1s step-end infinite;
  animation-delay: 2s;
  animation-fill-mode: both;
}

@keyframes termBlink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

.fv-deploy-line--dim {
  color: var(--text-secondary);
}

.fv-deploy-line--muted {
  color: var(--text-muted);
}

.fv-deploy-line--success {
  color: #16a34a;
}

[data-theme="dark"] .fv-deploy-line--success {
  color: #3fb950;
}

.fv-deploy-line--url {
  color: var(--brand);
}

/* ----------------------------------------
   Feature visual: Models
   ---------------------------------------- */

.fv-models {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.fv-model-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  cursor: default;
  transition: all 400ms cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0;
  transform: translateY(8px);
}

.fv-model-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border-strong);
  transition: background 400ms ease, box-shadow 400ms ease;
}

.revealed .fv-model-chip {
  opacity: 1;
  transform: translateY(0);
}

.revealed .fv-model-chip:nth-child(1) {
  transition-delay: 0.1s;
}

.revealed .fv-model-chip:nth-child(2) {
  transition-delay: 0.16s;
}

.revealed .fv-model-chip:nth-child(3) {
  transition-delay: 0.22s;
}

.revealed .fv-model-chip:nth-child(4) {
  transition-delay: 0.28s;
}

.revealed .fv-model-chip:nth-child(5) {
  transition-delay: 0.34s;
}

.revealed .fv-model-chip:nth-child(6) {
  transition-delay: 0.4s;
}

.revealed .fv-model-chip:nth-child(7) {
  transition-delay: 0.46s;
}

.revealed .fv-model-chip:nth-child(8) {
  transition-delay: 0.52s;
}

.revealed .fv-model-chip:nth-child(9) {
  transition-delay: 0.58s;
}

.fv-model-chip--active {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

.fv-model-chip--active .fv-model-indicator {
  background: var(--brand);
  box-shadow: 0 0 8px rgba(99, 223, 246, 0.45);
}

[data-theme="dark"] .fv-model-chip--active .fv-model-indicator {
  box-shadow: 0 0 8px rgba(164, 184, 205, 0.45);
}

.feature-card:hover .fv-model-chip {
  border-color: var(--border-strong);
}

.feature-card:hover .fv-model-chip--active {
  border-color: var(--text);
}

/* ----------------------------------------
   Feature visual: Open Source (network graph)
   ---------------------------------------- */

.fv-oss {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.fv-oss-network {
  width: 100%;
  height: auto;
  color: var(--border-strong);
}

/* Draw-in for main branch line */
.fv-net-main {
  stroke-dasharray: 840;
  stroke-dashoffset: 840;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-net-main {
  stroke-dashoffset: 0;
  transition-delay: 0.1s;
}

/* Draw-in for feature branch paths */
.fv-net-feat1,
.fv-net-feat2,
.fv-net-feat3 {
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  transition: stroke-dashoffset 900ms cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-net-feat1 {
  stroke-dashoffset: 0;
  transition-delay: 0.35s;
}

.revealed .fv-net-feat2 {
  stroke-dashoffset: 0;
  transition-delay: 0.55s;
}

.revealed .fv-net-feat3 {
  stroke-dashoffset: 0;
  transition-delay: 0.75s;
}

/* Commit dots scale in */
.fv-net-dot {
  transform-origin: center;
  transform: scale(0);
  transition: transform 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed .fv-net-dot {
  transform: scale(1);
}

.revealed .fv-net-dot:nth-of-type(1) { transition-delay: 0.15s; }
.revealed .fv-net-dot:nth-of-type(2) { transition-delay: 0.22s; }
.revealed .fv-net-dot:nth-of-type(3) { transition-delay: 0.29s; }
.revealed .fv-net-dot:nth-of-type(4) { transition-delay: 0.36s; }
.revealed .fv-net-dot:nth-of-type(5) { transition-delay: 0.40s; }
.revealed .fv-net-dot:nth-of-type(6) { transition-delay: 0.43s; }
.revealed .fv-net-dot:nth-of-type(7) { transition-delay: 0.46s; }
.revealed .fv-net-dot:nth-of-type(8) { transition-delay: 0.50s; }
.revealed .fv-net-dot:nth-of-type(9) { transition-delay: 0.54s; }
.revealed .fv-net-dot:nth-of-type(10) { transition-delay: 0.58s; }
.revealed .fv-net-dot:nth-of-type(11) { transition-delay: 0.62s; }
.revealed .fv-net-dot:nth-of-type(12) { transition-delay: 0.42s; }
.revealed .fv-net-dot:nth-of-type(13) { transition-delay: 0.50s; }
.revealed .fv-net-dot:nth-of-type(14) { transition-delay: 0.60s; }
.revealed .fv-net-dot:nth-of-type(15) { transition-delay: 0.65s; }
.revealed .fv-net-dot:nth-of-type(16) { transition-delay: 0.80s; }
.revealed .fv-net-dot:nth-of-type(17) { transition-delay: 0.86s; }
.revealed .fv-net-dot:nth-of-type(18) { transition-delay: 0.92s; }

/* Branch labels */
.fv-net-label {
  font-family: var(--font-mono, 'SF Mono', 'Fira Code', monospace);
  font-size: 11px;
  font-weight: 500;
  opacity: 0;
  transition: opacity 350ms ease;
}

.revealed .fv-net-label {
  opacity: 1;
  transition-delay: 0.6s;
}

/* Version tags */
.fv-net-tag {
  font-family: var(--font-mono, 'SF Mono', 'Fira Code', monospace);
  font-size: 9px;
  font-weight: 600;
  opacity: 0;
  transition: opacity 350ms ease;
}

.revealed .fv-net-tag {
  opacity: 1;
  transition-delay: 0.7s;
}

/* Traveling pulse along main branch */
.fv-net-pulse {
  opacity: 0;
}

.revealed .fv-net-pulse {
  animation: netPulse 5s ease-in-out 1.4s infinite;
}

@keyframes netPulse {
  0%   { cx: 24;  opacity: 0; }
  3%   { opacity: 1; }
  50%  { cx: 500; opacity: 0.8; }
  90%  { cx: 856; opacity: 0.3; }
  100% { cx: 856; opacity: 0; }
}


/* ========================================
   FEATURE CARD EXPANSION
   ======================================== */

/* Expandable detail section — grid row trick for smooth height */
.feature-card-detail-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 500ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

.feature-card.expanded .feature-card-detail-wrap {
  grid-template-rows: 1fr;
}

.feature-card-detail {
  overflow: hidden;
}

.feature-card-detail-inner {
  padding: 0 var(--space-8) var(--space-4);
}

/* Detail content fade-in */
.feature-card-detail-inner .detail-divider,
.feature-card-detail-inner .detail-body {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 300ms ease, transform 300ms ease;
}

.feature-card.expanded .feature-card-detail-inner .detail-divider {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 120ms;
}

.feature-card.expanded .feature-card-detail-inner .detail-body {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 180ms;
}

.detail-divider {
  display: none;
}

.detail-body {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.85;
}

[data-theme="dark"] .detail-body {
  color: var(--tone-off-white);
}

.detail-body p {
  margin-bottom: var(--space-4);
}

.detail-body p:last-child {
  margin-bottom: 0;
}

.detail-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

/* ========================================
   QUICKSTART
   ======================================== */

.quickstart {
  text-align: center;
  padding: var(--space-6) 0;
}

.code-block {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  max-width: 100%;
}

.code-block code {
  color: var(--text-secondary);
  overflow-x: auto;
  white-space: nowrap;
}

.code-copy {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 150ms ease;
  flex-shrink: 0;
}

.code-copy:hover {
  color: var(--text);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--bg-tertiary);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-5);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 150ms ease;
}

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

/* ========================================
   RESPONSIVE
   ======================================== */


@media (max-width: 860px) {
  .features-grid {
    max-width: 560px;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: 120vh;
    min-height: 120svh;
  }

  .hero-title {
    font-size: clamp(2.25rem, 10vw, 3.5rem);
  }

  .hero-word-label {
    display: none;
  }

  /* Hide text nav links on mobile, keep icons */
  .landing-nav .nav-links {
    display: none;
  }

  /* ASCII art: scale down on mobile so it doesn't dominate */
  .hero-ascii {
    font-size: 4.5px;
    transform: translateY(-50%) scaleX(0.85) scale(0.7);
    transform-origin: right center;
  }

  @media (prefers-reduced-motion: no-preference) {
    .hero-ascii {
      animation:
        asciiArtFadeIn 0.6s ease 0.2s forwards,
        asciiDriftMobile 40s ease-in-out infinite;
    }
  }

  @keyframes asciiDriftMobile {
    0%, 100% {
      transform: translateY(-50%) scaleX(0.85) scale(0.7);
    }
    50% {
      transform: translateY(calc(-50% - 8px)) scaleX(0.85) scale(0.7);
    }
  }

  .hero .container {
    padding-top: 30vh;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .feature-card-visual {
    min-height: 220px;
    padding: var(--space-8) var(--space-5);
  }

  .code-block {
    width: 100%;
    overflow-x: auto;
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .fv-flow {
    flex-wrap: wrap;
    gap: 6px;
  }

  .fv-edge {
    width: 16px;
  }

  .fv-node {
    padding: 10px 14px;
  }

  .fv-node-label {
    font-size: 11px;
  }


  .feature-card-detail-inner {
    padding: 0 var(--space-5) var(--space-5);
  }
}

/* ── CTA Section ── */
.cta-section {
  padding: var(--space-16) 0 var(--space-20);
}

.cta-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  overflow: hidden;
}

.cta-preview {
  background: color-mix(in srgb, var(--bg-tertiary) 90%, var(--bg));
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

[data-theme="dark"] .cta-preview {
  background: color-mix(in srgb, var(--bg-tertiary) 82%, #1f2229);
}

.cta-chat-bubbles {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cta-bubble {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease-smooth), transform 0.5s var(--ease-smooth);
}

.revealed .cta-bubble { opacity: 1; transform: none; }
.revealed .cta-bubble:nth-child(1) { transition-delay: 0.1s; }
.revealed .cta-bubble:nth-child(2) { transition-delay: 0.4s; }
.revealed .cta-bubble:nth-child(3) { transition-delay: 0.7s; }

.cta-bubble-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
}

.cta-bubble--user .cta-bubble-avatar {
  background: var(--brand-soft);
  color: var(--brand);
}

.cta-bubble--agent .cta-bubble-avatar {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.cta-bubble-text {
  background: var(--bg-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--text-secondary);
}

[data-theme="dark"] .cta-bubble-text {
  background: color-mix(in srgb, var(--bg-secondary) 30%, #1f2229);
}

.cta-bubble--user .cta-bubble-text {
  background: var(--brand);
  color: #fff;
}

[data-theme="dark"] .cta-bubble--user .cta-bubble-text {
  background: color-mix(in srgb, var(--brand) 30%, #1f2229);
  color: rgba(255, 255, 255, 0.85);
}

.cta-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-4);
}

.cta-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.cta-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .cta-card {
    grid-template-columns: 1fr;
  }
  .cta-section { padding: var(--space-10) 0 var(--space-14); }
}