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

:root {
  --green-50: #ECFDF5;
  --green-100: #D1FAE5;
  --green-200: #A7F3D0;
  --green-300: #6EE7B7;
  --green-400: #34D399;
  --green-500: #10B981;
  --green-600: #059669;
  --green-700: #047857;
  --green-800: #065F46;
  --green-900: #064E3B;
  --green-950: #022C22;

  --bg: #060E0A;
  --bg-elevated: #0A1610;
  --bg-surface: #0F1F17;
  --bg-surface-2: #142A1E;
  --text: #E2F5EC;
  --text-muted: #6B8F7B;
  --text-dim: #3D5C4A;
  --border: #1A3327;
  --border-bright: #2A4D3A;

  --low-color: #34D399;
  --mid-color: #FBBF24;
  --high-color: #F87171;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

html {
  font-family: var(--font-display);
  background: var(--bg);
  color: var(--text);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
}

::selection {
  background: var(--green-800);
  color: var(--green-100);
}

/* ─── Noise Overlay ─── */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ─── Section Layout ─── */
section {
  padding: clamp(4rem, 10vh, 8rem) clamp(1.5rem, 5vw, 4rem);
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--green-500);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--green-100);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.6;
  margin-bottom: 3rem;
}

/* ─── Hero ─── */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: clamp(6rem, 15vh, 12rem);
  padding-bottom: clamp(4rem, 10vh, 8rem);
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(ellipse, oklch(0.45 0.12 155 / 0.12), transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.15;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black, transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.hero-gearbox {
  position: relative;
  animation: slideUp 0.8s var(--ease-out-expo) 0.5s both;
}

#gearboxCanvas {
  width: 100%;
  height: 360px;
  display: block;
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-gearbox {
    order: -1;
  }
  #gearboxCanvas {
    height: 260px;
  }
}

.hero-title {
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.9;
  margin-bottom: 1.5rem;
}

.title-gear {
  color: var(--green-300);
  display: inline-block;
  animation: slideUp 0.8s var(--ease-out-expo) 0.1s both;
}

.title-bx {
  color: var(--green-500);
  display: inline-block;
  animation: slideUp 0.8s var(--ease-out-expo) 0.25s both;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-sub {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 1.8vw, 1.05rem);
  font-weight: 400;
  color: var(--green-400);
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
  animation: slideUp 0.8s var(--ease-out-expo) 0.4s both;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.65;
  margin-bottom: 2.5rem;
  animation: slideUp 0.8s var(--ease-out-expo) 0.55s both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  animation: slideUp 0.8s var(--ease-out-expo) 0.7s both;
}

/* ─── Buttons ─── */
.btn {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.75rem 1.75rem;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s var(--ease-out-quart);
  text-decoration: none;
}

.btn-primary {
  background: var(--green-600);
  color: var(--green-50);
}

.btn-primary:hover {
  background: var(--green-500);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px oklch(0.5 0.12 155 / 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--green-400);
  border: 1px solid var(--border-bright);
}

.btn-ghost:hover {
  border-color: var(--green-500);
  color: var(--green-300);
  transform: translateY(-2px);
}

.btn-arrow {
  transition: transform 0.3s var(--ease-out-quart);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

.btn-primary:hover .btn-arrow {
  transform: translateY(3px);
}

/* ─── Terminal Demo ─── */
.terminal-demo {
  margin-top: 3.5rem;
  max-width: 560px;
  border: 1px solid var(--border-bright);
  background: var(--bg);
  overflow: hidden;
  animation: slideUp 0.8s var(--ease-out-expo) 0.9s both;
}

.terminal-chrome {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-r { background: #F87171; }
.dot-y { background: #FBBF24; }
.dot-g { background: #34D399; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
  min-height: 120px;
}

.terminal-line {
  white-space: nowrap;
  overflow: hidden;
}

.t-prompt {
  color: var(--green-500);
  margin-right: 0.5em;
}

.t-cmd {
  color: var(--green-300);
  font-weight: 600;
}

.t-dim { color: var(--text-dim); }

.output-line {
  color: var(--text);
  min-height: 1.4em;
  white-space: normal;
  word-wrap: break-word;
}

.output-line .token-out {
  transition: color 0.2s;
}

.output-line .token-out.gear-low { color: var(--low-color); }
.output-line .token-out.gear-mid { color: var(--text); }
.output-line .token-out.gear-high { color: var(--high-color); }

.terminal-gear-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.7rem;
}

.tgb-icon {
  animation: tgbSpin 3s linear infinite;
}

@keyframes tgbSpin {
  to { transform: rotate(360deg); }
}

.tgb-label {
  font-weight: 600;
  letter-spacing: 0.08em;
  min-width: 3em;
  color: var(--mid-color);
  transition: color 0.3s;
}

.tgb-label.gear-low { color: var(--low-color); }
.tgb-label.gear-mid { color: var(--mid-color); }
.tgb-label.gear-high { color: var(--high-color); }

.tgb-bar {
  flex: 1;
  height: 3px;
  background: var(--bg-surface);
  position: relative;
  overflow: hidden;
}

.tgb-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 50%;
  background: var(--mid-color);
  transition: width 0.5s var(--ease-out-expo), background 0.3s;
}

.tgb-fill.gear-low { width: 25%; background: var(--low-color); }
.tgb-fill.gear-mid { width: 55%; background: var(--mid-color); }
.tgb-fill.gear-high { width: 85%; background: var(--high-color); }

.tgb-entropy {
  color: var(--text-dim);
  min-width: 4.5em;
  text-align: right;
}

/* ─── Gearbox Section ─── */
.gearbox-section {
  padding-top: 2rem;
}

.gearbox-container {
  max-width: 100%;
}

/* ─── Token-by-Token Demo ─── */
.demo-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.gen-window {
  border: 1px solid var(--border-bright);
  background: var(--bg);
  overflow: hidden;
}

.gen-chrome {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.gen-dots {
  display: flex;
  gap: 6px;
}

.gen-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  flex: 1;
}

.gen-replay {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  transition: color 0.2s, border-color 0.2s;
}

.gen-replay:hover {
  color: var(--green-400);
  border-color: var(--green-700);
}

.gen-body {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text);
  min-height: 120px;
  max-height: 200px;
  overflow-y: auto;
}

.gen-body .tok {
  display: inline;
  transition: opacity 0.2s;
}

.gen-body .tok.t-low { color: var(--low-color); }
.gen-body .tok.t-mid { color: var(--mid-color); }
.gen-body .tok.t-high { color: var(--high-color); }

.gen-body .tok-cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--green-400);
  vertical-align: text-bottom;
  animation: cursorBlink 0.8s step-end infinite;
  margin-left: 1px;
}

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

.gen-stats {
  display: flex;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.gen-stat {
  flex: 1;
  padding: 0.6rem 0.75rem;
  text-align: center;
  border-right: 1px solid var(--border);
}

.gen-stat:last-child { border-right: none; }

.gen-stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.gen-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  transition: color 0.3s;
}

/* Tier cards */
.tier-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
}

@media (max-width: 640px) {
  .tier-cards { grid-template-columns: 1fr; }
}

.tier-card {
  background: var(--bg-elevated);
  padding: 1.25rem 1.25rem;
  transition: background 0.3s;
}

.tier-card.active {
  background: var(--bg-surface);
}

.tier-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.tier-card-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  transition: box-shadow 0.3s;
}

.tier-dot-low { background: var(--low-color); }
.tier-dot-mid { background: var(--mid-color); }
.tier-dot-high { background: var(--high-color); }

.tier-card.active .tier-dot-low { box-shadow: 0 0 8px var(--low-color); }
.tier-card.active .tier-dot-mid { box-shadow: 0 0 8px var(--mid-color); }
.tier-card.active .tier-dot-high { box-shadow: 0 0 8px var(--high-color); }

.tier-card-name {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-dim);
}

.tier-card-bits {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.tier-card-low .tier-card-bits { color: var(--low-color); }
.tier-card-mid .tier-card-bits { color: var(--mid-color); }
.tier-card-high .tier-card-bits { color: var(--high-color); }

.tier-card-stat {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.8;
}

.tier-stat-num {
  color: var(--text-muted);
  font-weight: 600;
}

.tier-card-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.tier-card-count span {
  font-weight: 700;
  color: var(--text);
}

/* Entropy timeline */
.entropy-timeline {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 1rem 1.25rem;
}

.timeline-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

#entropyCanvas {
  width: 100%;
  height: 80px;
  display: block;
}

.timeline-thresholds {
  position: absolute;
  right: 1.25rem;
  bottom: 1rem;
  top: 2.2rem;
  width: 0;
  pointer-events: none;
}

.threshold-mark {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-dim);
  transform: translateX(8px);
}


/* ─── How Section ─── */
.how-section {
  border-top: 1px solid var(--border);
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}

@media (max-width: 640px) {
  .steps { grid-template-columns: 1fr; }
}

.step {
  padding: 2rem;
  border: 1px solid var(--border);
  margin: -0.5px;
  transition: background 0.4s var(--ease-out-expo), border-color 0.4s;
}

.step:hover {
  background: var(--bg-elevated);
  border-color: var(--border-bright);
  z-index: 1;
  position: relative;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green-600);
  margin-bottom: 1rem;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--green-200);
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ─── Install Section ─── */
.install-section {
  border-top: 1px solid var(--border);
}

.install-group-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green-400);
  margin-bottom: 0.75rem;
}

.install-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.install-hint .inline-code {
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 0.15em 0.4em;
  font-size: 0.9em;
  color: var(--green-300);
}

.install-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

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

.install-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 1.5rem;
  transition: border-color 0.3s;
}

.install-card:hover {
  border-color: var(--green-700);
}

.install-method {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green-500);
  margin-bottom: 1rem;
}

.install-code {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg);
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  overflow-x: auto;
}

.install-code code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green-300);
  white-space: nowrap;
  flex: 1;
}

.copy-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
  transition: color 0.2s;
}

.copy-btn:hover {
  color: var(--green-400);
}

.copy-btn.copied {
  color: var(--green-400);
}

.prereqs {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.prereq-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.prereq-item { color: var(--text-muted); }

/* ─── Footer ─── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem clamp(1.5rem, 5vw, 4rem);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
}

.footer-brand {
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--green-500);
}

.footer-sep { color: var(--text-dim); }

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-link:hover { color: var(--green-400); }

.footer-copy { color: var(--text-dim); }

/* ─── Scroll Animations ─── */
.step,
.install-card {
  opacity: 0;
  transform: translateY(20px);
}

.step.visible,
.install-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

/* Stagger */
.step:nth-child(1).visible { transition-delay: 0s; }
.step:nth-child(2).visible { transition-delay: 0.08s; }
.step:nth-child(3).visible { transition-delay: 0.16s; }
.step:nth-child(4).visible { transition-delay: 0.24s; }

.install-card:nth-child(1).visible { transition-delay: 0s; }
.install-card:nth-child(2).visible { transition-delay: 0.08s; }
.install-card:nth-child(3).visible { transition-delay: 0.16s; }


/* ─── What is GEARBX Section ─── */
.what-section {
  border-top: 1px solid var(--border);
}

.what-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: start;
}

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

.what-main p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.what-main p:last-child {
  margin-bottom: 0;
}

.what-aside {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
}

.what-stat-card {
  background: var(--bg-elevated);
  padding: 1.5rem;
}

.what-stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--green-300);
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.what-stat-desc {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── Comparison Table ─── */
.compare-section {
  border-top: 1px solid var(--border);
}

.compare-table {
  border: 1px solid var(--border);
}

.compare-header {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1px;
  background: var(--border);
}

.compare-header > span {
  background: var(--bg-surface);
  padding: 0.75rem 1rem;
}

.compare-col-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.compare-col-gearbx {
  color: var(--green-400);
}

.compare-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1px;
  background: var(--border);
  transition: background 0.2s;
}

.compare-row > span {
  background: var(--bg-elevated);
  padding: 0.85rem 1rem;
  font-size: 0.85rem;
  line-height: 1.5;
}

.compare-row:hover > span {
  background: var(--bg-surface);
}

.compare-feature {
  color: var(--text);
  font-weight: 500;
}

.compare-static {
  color: var(--text-dim);
}

.compare-gearbx {
  color: var(--green-300);
}

@media (max-width: 640px) {
  .compare-header,
  .compare-row {
    grid-template-columns: 1fr;
  }

  .compare-header > span:first-child {
    display: none;
  }

  .compare-feature {
    border-bottom: none;
    padding-bottom: 0.25rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }
}

/* Scroll reveal for new sections */
.what-stat-card,
.compare-row {
  opacity: 0;
  transform: translateY(16px);
}

.what-stat-card.visible,
.compare-row.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s var(--ease-out-expo), transform 0.5s var(--ease-out-expo);
}

.what-stat-card:nth-child(1).visible { transition-delay: 0s; }
.what-stat-card:nth-child(2).visible { transition-delay: 0.08s; }
.what-stat-card:nth-child(3).visible { transition-delay: 0.16s; }

.compare-row:nth-child(2).visible { transition-delay: 0s; }
.compare-row:nth-child(3).visible { transition-delay: 0.06s; }
.compare-row:nth-child(4).visible { transition-delay: 0.12s; }
.compare-row:nth-child(5).visible { transition-delay: 0.18s; }
.compare-row:nth-child(6).visible { transition-delay: 0.24s; }
.compare-row:nth-child(7).visible { transition-delay: 0.30s; }