/* ==========================================================================
   SYNAPSE PROTOCOL — Design tokens
   ========================================================================== */
:root {
  --bg-primary: #050608;
  --bg-container: #0A0C14;
  --bg-elevated: #10121F;
  --bg-elevated-2: #151833;

  --neon-blue: #3E7BFA;
  --neon-blue-soft: #6E9CFF;
  --neon-purple: #A855F7;
  --neon-purple-soft: #C084FC;
  --cyan: #22D3EE;

  --grad-signal: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));

  --text-primary: #F1F3FA;
  --text-secondary: #8A90A6;
  --text-tertiary: #565C72;

  --border: rgba(124, 58, 237, 0.16);
  --border-soft: rgba(255, 255, 255, 0.06);
  --blue-dim: rgba(62, 123, 250, 0.14);
  --purple-dim: rgba(168, 85, 247, 0.14);
  --cyan-dim: rgba(34, 211, 238, 0.14);

  --font-display: "Space Grotesk", "PingFang SC", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", monospace;

  --container-w: 1180px;
  --gutter: clamp(20px, 5vw, 64px);

  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
}

/* ==========================================================================
   Reset
   ========================================================================== */
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  max-width: 100%;
  overflow-x: hidden;
}
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video, canvas, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }
input { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--neon-blue);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Layout primitives
   ========================================================================== */
.wrap {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  position: relative;
  z-index: 1;
}
.section {
  width: 100%;
  padding-top: clamp(56px, 10vw, 120px);
  padding-bottom: clamp(56px, 10vw, 120px);
  position: relative;
}
.section-tight {
  padding-top: clamp(36px, 5vw, 56px);
  padding-bottom: clamp(36px, 5vw, 56px);
  background: var(--bg-container);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  position: relative;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: var(--grad-signal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--neon-blue);
  border-radius: 50%;
  box-shadow: 0 0 8px 2px var(--neon-blue);
  flex: none;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4.2vw, 42px);
  line-height: 1.25;
  color: var(--text-primary);
  margin-top: 14px;
}
.section-desc {
  font-size: clamp(14px, 1.6vw, 16px);
  color: var(--text-secondary);
  max-width: 640px;
  margin-top: 16px;
}
.texture-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(124, 58, 237, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(62, 123, 250, 0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.85) 18%, rgba(0,0,0,0.85) 82%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.85) 18%, rgba(0,0,0,0.85) 82%, transparent 100%);
  pointer-events: none;
}

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(5, 6, 8, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border-soft);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  white-space: nowrap;
}
.logo-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--grad-signal);
  box-shadow: 0 0 0 0 rgba(168, 85, 247, 0.6);
  animation: pulse-signal 2.4s ease-out infinite;
  flex: none;
}
@keyframes pulse-signal {
  0%   { box-shadow: 0 0 0 0 rgba(168, 85, 247, 0.55); }
  70%  { box-shadow: 0 0 0 8px rgba(168, 85, 247, 0); }
  100% { box-shadow: 0 0 0 0 rgba(168, 85, 247, 0); }
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 34px;
}
.nav-link {
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}
.nav-link:hover { color: var(--text-primary); }
.nav-cta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--bg-primary);
  background: var(--grad-signal);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border: none;
  font-weight: 600;
  transition: filter 0.2s ease, transform 0.2s ease;
}
.nav-cta:hover { filter: brightness(1.12); transform: translateY(-1px); }

.burger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  flex-direction: column;
  gap: 4px;
}
.burger span {
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.burger.is-open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 64px 0 0 0;
  background: #030405;
  z-index: 99;
  display: flex;
  flex-direction: column;
  padding: 28px var(--gutter);
  gap: 4px;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  isolation: isolate;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}
.mobile-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}
.mobile-menu a {
  font-family: var(--font-display);
  font-size: 24px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text-primary);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.mobile-menu .nav-cta {
  margin-top: 20px;
  justify-content: center;
  font-size: 13px;
  padding: 14px 18px;
}

@media (min-width: 860px) {
  .nav-desktop { display: flex; }
  .burger { display: none; }
  .mobile-menu { display: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding-top: clamp(150px, 22vw, 212px);
  padding-bottom: clamp(64px, 10vw, 110px);
  overflow: hidden;
  position: relative;
  background: var(--bg-primary);
}
.hero-circuit {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(0deg, rgba(62,123,250,0.10) 0 1px, transparent 1px 90px),
    repeating-linear-gradient(90deg, rgba(168,85,247,0.10) 0 1px, transparent 1px 130px),
    radial-gradient(circle at 20% 30%, rgba(62,123,250,0.14) 0, transparent 2px),
    radial-gradient(circle at 60% 70%, rgba(168,85,247,0.14) 0, transparent 2px),
    radial-gradient(circle at 85% 15%, rgba(34,211,238,0.12) 0, transparent 2px);
  mask-image: radial-gradient(ellipse 85% 70% at 50% 32%, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.3) 60%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 70% at 50% 32%, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.3) 60%, transparent 100%);
  pointer-events: none;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.9;
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  top: -14%;
  left: 50%;
  width: 1100px;
  height: 1100px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(168,85,247,0.20) 0%, rgba(62,123,250,0.08) 45%, rgba(62,123,250,0) 70%);
  z-index: 1;
  pointer-events: none;
}
.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(ellipse 70% 55% at 50% 36%, rgba(5,6,8,0.6) 0%, rgba(5,6,8,0.18) 55%, rgba(5,6,8,0) 78%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; text-align: center; }
.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 5.8vw, 60px);
  line-height: 1.16;
  color: var(--text-primary);
  max-width: 860px;
  margin: 20px auto 0;
}
.hero-sub {
  font-size: clamp(14px, 1.7vw, 17px);
  color: var(--text-secondary);
  max-width: 620px;
  margin: 22px auto 0;
}

/* Waitlist form (reused in hero + final CTA) */
.waitlist-form {
  margin-top: 34px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 560px) {
  .waitlist-form { flex-direction: row; }
}
.waitlist-input {
  flex: 1;
  min-height: 48px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13.5px;
  padding: 0 16px;
  transition: border-color 0.2s ease;
}
.waitlist-input::placeholder { color: var(--text-tertiary); }
.waitlist-input:focus { border-color: var(--neon-blue); outline: none; }
.waitlist-submit {
  min-height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--grad-signal);
  color: #050608;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.03em;
  white-space: nowrap;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: filter 0.2s ease, transform 0.2s ease;
}
.waitlist-submit:hover { filter: brightness(1.12); transform: translateY(-1px); }
.waitlist-submit[data-state="loading"] {
  filter: grayscale(0.4) brightness(0.8);
  pointer-events: none;
}
.waitlist-note {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}
.spinner {
  width: 13px; height: 13px;
  border-radius: 50%;
  border: 2px solid rgba(5,6,8,0.2);
  border-top-color: #050608;
  animation: spin 0.7s linear infinite;
  display: none;
}
.waitlist-submit[data-state="loading"] .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Generic buttons (used outside the waitlist form, e.g. secondary links) */
.btn {
  min-height: 44px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.btn:hover { color: var(--text-primary); border-color: var(--neon-blue-soft); }

/* ==========================================================================
   Live Network Pulse (stats bar)
   ========================================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}
@media (min-width: 720px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}
.stat-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: center;
  padding: 6px 4px;
}
.stat-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 32px);
  background: var(--grad-signal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   Timeline (Agent Workflow)
   ========================================================================== */
.timeline {
  margin-top: clamp(36px, 6vw, 56px);
  display: flex;
  flex-direction: column;
}
.timeline-item {
  display: flex;
  gap: 20px;
}
.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: none;
}
.timeline-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--neon-blue-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.timeline-line {
  width: 1px;
  flex: 1;
  min-height: 30px;
  background: linear-gradient(180deg, var(--border), transparent);
  margin-top: 4px;
}
.timeline-body { padding-bottom: 34px; padding-top: 6px; }
.timeline-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  color: var(--text-primary);
}
.timeline-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-top: 8px;
  max-width: 520px;
  line-height: 1.7;
}

/* ==========================================================================
   Card grids (mission-style two-col cards, reused for Thesis)
   ========================================================================== */
.two-col {
  margin-top: clamp(36px, 6vw, 56px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
@media (min-width: 720px) {
  .two-col { grid-template-columns: 1fr 1fr; gap: 28px; }
}
.info-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  background: var(--bg-elevated);
}
.info-card-icon {
  display: inline-flex;
  width: 30px;
  height: 30px;
  color: var(--neon-blue-soft);
  margin-bottom: 12px;
}
.info-card-icon svg { width: 100%; height: 100%; }
.info-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  color: var(--text-primary);
}
.info-card p {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ==========================================================================
   Node map (Global Node Network)
   ========================================================================== */
.node-map-shell {
  margin-top: clamp(36px, 6vw, 56px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-container);
  padding: clamp(16px, 3vw, 28px);
  position: relative;
  overflow: hidden;
}
.node-map-svg { width: 100%; height: auto; display: block; }
.node-map-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 18px;
  justify-content: center;
}
.node-map-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}
.node-map-legend-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--grad-signal);
  flex: none;
}

/* ==========================================================================
   Code window (SDK teaser + tokenomics ledger)
   ========================================================================== */
.code-window {
  background: var(--bg-primary);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}
.code-window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
}
.code-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-tertiary); opacity: 0.5; }
.code-body {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2;
  color: #A9B0C4;
  padding: 18px 20px;
  overflow-x: auto;
}
.code-body .tok-key { color: var(--neon-blue-soft); }
.code-body .tok-str { color: var(--cyan); }
.code-body .tok-comment { color: var(--text-tertiary); }
.code-body .tok-fn { color: var(--neon-purple-soft); }

/* ==========================================================================
   Use Cases + Ecosystem cards
   ========================================================================== */
.cards-grid {
  margin-top: clamp(36px, 6vw, 56px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
@media (min-width: 640px) {
  .cards-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1000px) {
  .cards-grid.cards-4 { grid-template-columns: repeat(4, 1fr); }
}
.use-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  padding: 24px 22px;
}
.use-card-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  text-transform: uppercase;
}
.use-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16.5px;
  color: var(--text-primary);
  margin-top: 10px;
}
.use-card p {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.chain-badges {
  margin-top: clamp(36px, 6vw, 56px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.chain-badge {
  border: 1px solid var(--border);
  border-radius: 30px;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg-elevated);
}

/* ==========================================================================
   FAQ (accordion)
   ========================================================================== */
.faq-list {
  margin-top: clamp(36px, 6vw, 56px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.faq-item {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  min-height: 44px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 14.5px;
  font-weight: 500;
  text-align: left;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-icon {
  flex: none;
  width: 18px;
  height: 18px;
  position: relative;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--neon-blue-soft);
  transition: transform 0.25s ease;
}
.faq-icon::before { top: 8px; left: 2px; width: 14px; height: 1.5px; }
.faq-icon::after { top: 2px; left: 8px; width: 1.5px; height: 14px; }
.faq-item.is-open .faq-icon::after { transform: rotate(90deg); opacity: 0; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s ease;
}
.faq-answer p {
  padding: 0 20px 18px;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   Final CTA + Footer
   ========================================================================== */
.final-cta {
  text-align: center;
  background: var(--bg-container);
  border-top: 1px solid var(--border-soft);
}
.final-cta .section-title { margin-top: 10px; }
.final-cta .waitlist-form { margin-top: 30px; }

.footer {
  padding: 34px var(--gutter) 44px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: center;
  text-align: center;
}
@media (min-width: 720px) {
  .footer { flex-direction: column; justify-content: center; text-align: center; }
}
.footer-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-copy {
  font-size: 12px;
  color: var(--text-tertiary);
}
.footer-partner {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}
.footer-partner strong { color: var(--text-secondary); font-weight: 600; }

/* ==========================================================================
   Confirmation modal
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(5, 6, 8, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gutter);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}
.modal-card {
  background: #08090D;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 420px;
  width: 100%;
  padding: 32px 28px;
  text-align: center;
  transform: translateY(8px) scale(0.98);
  transition: transform 0.25s ease;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.55);
}
.modal-overlay.is-open .modal-card {
  transform: translateY(0) scale(1);
}
.modal-check {
  display: inline-flex;
  width: 44px;
  height: 44px;
  color: var(--cyan);
  margin: 0 auto 16px;
}
.modal-check svg { width: 100%; height: 100%; }
.modal-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  color: var(--text-primary);
}
.modal-body {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.modal-close {
  margin-top: 24px;
  min-height: 44px;
  padding: 0 26px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: none;
  color: var(--text-primary);
  font-size: 13px;
  letter-spacing: 0.02em;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.modal-close:hover {
  border-color: var(--neon-blue-soft);
  color: var(--neon-blue-soft);
}

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Node map animations
   ========================================================================== */
@keyframes dash-flow {
  to { stroke-dashoffset: -160; }
}
.node-pulse {
  animation: node-pulse-anim 2.4s ease-in-out infinite;
  transform-origin: center;
}
@keyframes node-pulse-anim {
  0%, 100% { r: 5; opacity: 0.15; }
  50% { r: 11; opacity: 0.35; }
}

/* ==========================================================================
   Section photo banner (real photography, used sparingly across sections)
   ========================================================================== */
.section-photo {
  position: relative;
  margin-top: clamp(28px, 5vw, 40px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  aspect-ratio: 16 / 6;
}
@media (max-width: 640px) {
  .section-photo { aspect-ratio: 4 / 3; }
}
.section-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) brightness(0.55) contrast(1.1);
}
.section-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5,6,8,0.15) 0%, rgba(5,6,8,0.8) 100%);
}
.section-photo-tag {
  position: absolute;
  left: 20px;
  bottom: 16px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  background: rgba(5,6,8,0.55);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
}