:root {
  --ink-dark: #17263f;
  --ink-blue: #2886c7;
  --glow: #4cc3ff;
  --gray: #7a8594;
  --bg: #ffffff;
  --logo-w: min(88vw, 620px);
}

* { box-sizing: border-box; }

html, body { margin: 0; height: 100%; }

body {
  font-family: 'Jura', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(ellipse 70% 60% at 50% 42%, #ffffff 0%, #f6f9fc 70%, #eef3f8 100%);
  background-color: var(--bg);
  color: var(--ink-dark);
  overflow-x: hidden;
}

.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem 4rem;
  text-align: center;
}

/* ---------- Logo ---------- */

.logo {
  width: var(--logo-w);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.bird-svg {
  width: 64%;
  height: auto;
  overflow: visible;
  transform: translateX(3%);
}

.edge {
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-width 0.3s ease, filter 0.3s ease, opacity 0.3s ease;
}

.node .dot {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.35s cubic-bezier(.34, 1.56, .64, 1), filter 0.3s ease, opacity 0.3s ease;
}
.node.corner .dot { opacity: 0; transform: scale(0.3); }

.node .hit {
  fill: transparent;
  cursor: pointer;
  pointer-events: all;
}

/* pre-animation state (JS adds .animate to <svg> before first frame) */
.bird-svg.animate .node .dot { opacity: 0; transform: scale(0); }
.bird-svg.animate .node.shown:not(.corner) .dot { opacity: 1; transform: scale(1); }

/* hover */
.bird-svg.hovering .edge { opacity: 0.45; }
.bird-svg.hovering .edge.active {
  opacity: 1;
  stroke: var(--glow);
  stroke-width: 10;
  filter: drop-shadow(0 0 6px rgba(76, 195, 255, 0.85));
}
.node.active .dot,
.node.corner.active .dot {
  opacity: 1;
  transform: scale(1.7);
  filter: drop-shadow(0 0 8px rgba(76, 195, 255, 0.95));
}
.node.hub .dot { transform: scale(2.1); fill: var(--glow); }

/* travelling light pulses */
.spark {
  stroke: #bfe9ff;
  stroke-width: 5;
  stroke-linecap: round;
  pointer-events: none;
  filter: drop-shadow(0 0 5px rgba(76, 195, 255, 1));
}

/* idle breathing glow */
.bird-svg.idle .node:not(.corner):not(.active) .dot {
  animation: breathe 4s ease-in-out infinite;
  animation-delay: calc(var(--i, 0) * -0.37s);
}
@keyframes breathe {
  0%, 100% { filter: drop-shadow(0 0 0 rgba(76, 195, 255, 0)); }
  50%      { filter: drop-shadow(0 0 5px rgba(76, 195, 255, 0.7)); }
}

/* ---------- Wordmark ---------- */

.wordmark {
  margin: 0.32em 0 0;
  font-size: calc(var(--logo-w) * 0.158);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.055em;
  white-space: nowrap;
}
.word-bird   { color: var(--ink-dark); }
.word-saddle { color: var(--ink-blue); margin-left: 0.09em; }

.wordmark span {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.25em);
  filter: blur(6px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(.2, .8, .2, 1), filter 0.9s ease;
}
.wordmark .word-saddle { transition-delay: 0.18s; }
.wordmark.shown span { opacity: 1; transform: none; filter: none; }

.tagline {
  margin: 2.2rem 0 0;
  font-size: clamp(0.95rem, 2.4vw, 1.15rem);
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gray);
  opacity: 0;
  transition: opacity 1s ease 0.5s;
}
.tagline.shown { opacity: 1; }

.footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
  text-align: center;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--gray);
  opacity: 0;
  transition: opacity 1s ease 0.8s;
}
.footer.shown { opacity: 0.8; }

@media (prefers-reduced-motion: reduce) {
  .edge, .node .dot, .wordmark span, .tagline, .footer {
    transition: none !important;
    animation: none !important;
  }
}