/* ============================================================
   Nebula — tokens & base
============================================================ */

:root {
  --bg: #04040a;
  --ink: #e9edff;
  --ink-dim: #9aa3c7;
  --line: rgba(160, 172, 220, 0.16);
  --violet: #8b5cf6;
  --cyan: #3fd8ff;
  --glass: rgba(8, 10, 22, 0.55);
  --font-display: 'Syne', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  overflow: hidden; /* the page is the scene — nothing scrolls */
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(139, 92, 246, 0.45);
  color: #fff;
}

/* ============================================================
   Scene canvas
============================================================ */

#scene {
  position: fixed;
  inset: 0;
  z-index: 0;
}

#scene canvas {
  display: block;
}

/* ============================================================
   Transient hero — fades in over darkness, dissolves after
   the nebula lights come on. Never intercepts pointer events.
============================================================ */

.hero {
  position: fixed;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  pointer-events: none;
}

.hero-kicker,
.hero-title,
.hero-tagline {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 1.4s var(--ease-out), transform 1.4s var(--ease-out);
}

.hero-kicker {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.4rem, 11vw, 8.5rem);
  line-height: 1.02;
  letter-spacing: 0.01em;
  margin: 10px 0 18px;
  background: linear-gradient(105deg, #ffffff 30%, var(--cyan) 62%, var(--violet) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition-delay: 0.15s;
}

.hero-tagline {
  max-width: 520px;
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--ink-dim);
  transition-delay: 0.3s;
}

.hero.show .hero-kicker,
.hero.show .hero-title,
.hero.show .hero-tagline {
  opacity: 1;
  transform: translateY(0);
}

.hero.hide .hero-kicker,
.hero.hide .hero-title,
.hero.hide .hero-tagline {
  opacity: 0;
  transform: translateY(-14px);
  transition: opacity 1.6s ease, transform 1.6s ease;
}

/* ============================================================
   One-time cue
============================================================ */

#cue {
  position: fixed;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1s ease, transform 1s var(--ease-out);
}

#cue.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.cue-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  animation: cue-pulse 2.2s ease-in-out infinite;
}

@keyframes cue-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ============================================================
   Hover label — futuristic readout anchored beside the planet
============================================================ */

#label {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 15;
  width: 250px;
  padding: 14px 16px 15px;
  pointer-events: none;
  color: var(--ink);
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px) 0 0 / 100% 3px,
    var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid color-mix(in srgb, var(--accent, #8b5cf6) 55%, transparent);
  border-left-width: 2px;
  clip-path: polygon(
    0 0,
    calc(100% - 14px) 0,
    100% 14px,
    100% 100%,
    14px 100%,
    0 calc(100% - 14px)
  );
  box-shadow: 0 0 26px color-mix(in srgb, var(--accent, #8b5cf6) 18%, transparent);
  opacity: 0;
  transition: opacity 0.16s ease;
  will-change: transform;
}

#label.visible {
  opacity: 1;
}

/* Connector line + node dot toward the planet */
#label::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -32px;
  width: 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent, var(--cyan)));
}

#label::after {
  content: '';
  position: absolute;
  top: 50%;
  left: -36px;
  width: 5px;
  height: 5px;
  margin-top: -2px;
  border-radius: 50%;
  background: var(--accent, var(--cyan));
  box-shadow: 0 0 8px var(--accent, var(--cyan));
}

#label.flip::before {
  left: auto;
  right: -32px;
  background: linear-gradient(270deg, transparent, var(--accent, var(--cyan)));
}

#label.flip::after {
  left: auto;
  right: -36px;
}

.label-kicker {
  display: block;
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  color: color-mix(in srgb, var(--accent, #8b5cf6) 85%, #fff);
  margin-bottom: 6px;
}

.label-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.15;
  margin-bottom: 4px;
}

.label-desc {
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--ink-dim);
}

/* ============================================================
   Project sidebar — blurred, semi-transparent, slides from right
============================================================ */

#panel {
  position: fixed;
  top: 20px;
  right: 20px;
  bottom: 20px;
  z-index: 20;
  width: min(420px, calc(100vw - 40px));
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px 30px 30px;
  border-radius: 18px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  border: 1px solid var(--line);
  border-top: 1px solid color-mix(in srgb, var(--accent, #8b5cf6) 55%, transparent);
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.55),
    0 0 46px color-mix(in srgb, var(--accent, #8b5cf6) 14%, transparent);
  transform: translateX(calc(100% + 60px));
  transition: transform 0.7s var(--ease-out), visibility 0s linear 0.7s;
  overflow-y: auto;
  visibility: hidden;
}

#panel.open {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.7s var(--ease-out);
}

#panel-close {
  align-self: flex-start;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 16px;
  cursor: pointer;
  transition: color 0.25s ease, border-color 0.25s ease;
}

#panel-close:hover,
#panel-close:focus-visible {
  color: var(--ink);
  border-color: var(--accent, var(--cyan));
}

.panel-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent, #8b5cf6) 80%, #fff);
  margin-top: 6px;
}

#panel-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.1rem;
  line-height: 1.1;
}

#panel-tagline {
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--ink);
}

#panel-desc {
  font-size: 0.94rem;
  color: var(--ink-dim);
}

#panel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.tag {
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-dim);
  background: rgba(255, 255, 255, 0.03);
}

#panel-link {
  margin-top: auto;
  align-self: flex-start;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  color: #05050a;
  background: var(--accent, var(--cyan));
  border-radius: 999px;
  padding: 11px 24px;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s ease;
}

#panel-link:hover,
#panel-link:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px color-mix(in srgb, var(--accent, #3fd8ff) 45%, transparent);
}

/* ============================================================
   Focus visibility
============================================================ */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ============================================================
   Responsive
============================================================ */

@media (max-width: 760px) {
  /* Sidebar becomes a bottom sheet so the planet stays visible */
  #panel {
    top: auto;
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
    max-height: 58vh;
    transform: translateY(calc(100% + 40px));
    padding: 22px 22px 24px;
  }

  #panel.open {
    transform: translateY(0);
  }

  #label {
    width: 210px;
  }
}

/* ============================================================
   Reduced motion
============================================================ */

@media (prefers-reduced-motion: reduce) {
  #panel {
    transition-duration: 0.15s;
  }

  .cue-dot {
    animation: none;
  }

  .hero-kicker,
  .hero-title,
  .hero-tagline {
    transition-duration: 0.2s;
    transition-delay: 0s;
  }
}