:root {
  --bg: #07071a; --surf: #0f0f2e; --surf2: #181838;
  --cyan: #3ff0d0; --pink: #ff6eaa; --yellow: #ffd060;
  --green: #40e87a; --text: #d8d8ff; --muted: #5a6090; --r: 10px;
}

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

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Screens ── */
.screen {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.screen.active { display: flex; }

/* ── Canvas wrapper ── */
#gameScreen {
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  background: var(--bg);
}

canvas#canvas {
  display: block;
  border: 2px solid #1e1e50;
  border-radius: 4px;
  max-width: 100vw;
  max-height: calc(100vh - 60px);
}

/* ── HUD ── */
.hud {
  width: 900px;
  max-width: 100vw;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(7,7,26,0.85);
  border-bottom: 1px solid #1e1e50;
  flex-shrink: 0;
}
.hud-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}
.hud-altitude {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1.35rem;
  color: var(--cyan);
  letter-spacing: 2px;
  line-height: 1;
}
.hud-pb {
  font-size: 0.7rem;
  color: var(--yellow);
  letter-spacing: 1px;
}
.hud-seed {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 1px;
  text-align: right;
}
.hud-left { flex: 1; }
.hud-right { flex: 1; display: flex; justify-content: flex-end; }

/* ── Milestone message ── */
.milestone-msg {
  position: absolute;
  top: 90px;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'Orbitron', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--yellow);
  text-shadow: 0 0 16px var(--yellow), 0 0 32px rgba(255,208,96,0.5);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 10;
  white-space: nowrap;
}
.milestone-msg.show { opacity: 1; }

/* ── Menu ── */
.menu-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  width: 420px;
  max-width: 95vw;
  padding: 36px 28px;
  background: var(--surf);
  border: 1px solid #1e1e50;
  border-radius: var(--r);
  box-shadow: 0 0 60px rgba(63,240,208,0.08), 0 8px 40px rgba(0,0,0,0.5);
}
.logo {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 2.2rem;
  letter-spacing: 3px;
  line-height: 1;
}
.logo-stick { color: var(--text); }
.logo-bounce { color: var(--cyan); }
.tagline {
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.5px;
}

/* Seed row */
.seed-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
}
.seed-label {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 2px;
  flex-shrink: 0;
}
#seedInput {
  flex: 1;
  background: var(--surf2);
  border: 1.5px solid #2a2a60;
  border-radius: var(--r);
  padding: 9px 12px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--cyan);
  outline: none;
  letter-spacing: 1px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
#seedInput:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(63,240,208,0.25);
}
#seedInput::placeholder { color: var(--muted); font-weight: 400; }
.btn-icon {
  background: var(--surf2);
  border: 1.5px solid #2a2a60;
  border-radius: 8px;
  color: var(--muted);
  font-size: 1.1rem;
  width: 36px; height: 36px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s, color 0.2s;
}
.btn-icon:hover { border-color: var(--cyan); color: var(--cyan); }

/* Buttons */
.btn-primary {
  width: 100%;
  padding: 13px 0;
  background: linear-gradient(135deg, #1affb2 0%, #00c4e8 100%);
  border: none;
  border-radius: var(--r);
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1.05rem;
  color: #07071a;
  letter-spacing: 3px;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 0 20px rgba(63,240,208,0.3);
}
.btn-primary:hover { opacity: 0.9; box-shadow: 0 0 32px rgba(63,240,208,0.5); }
.btn-primary:active { transform: scale(0.97); }

.btn-secondary {
  flex: 1;
  padding: 10px 0;
  background: var(--surf2);
  border: 1.5px solid #2a2a60;
  border-radius: var(--r);
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text);
  letter-spacing: 2px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.btn-secondary:hover { border-color: var(--cyan); color: var(--cyan); }

.btn-ghost {
  background: transparent;
  border: none;
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.8rem;
  cursor: pointer;
  letter-spacing: 1px;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
  padding: 6px 0;
}
.btn-ghost:hover { color: var(--text); }

/* Controls box */
.controls-box, .recent-seeds-box {
  width: 100%;
  background: var(--surf2);
  border: 1px solid #1e1e50;
  border-radius: var(--r);
  padding: 12px 16px;
}
.controls-title, .lb-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 2px;
  margin-bottom: 10px;
  text-transform: uppercase;
}
.controls-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 5px 14px;
  font-size: 0.8rem;
}
.key {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(63,240,208,0.08);
  border: 1px solid rgba(63,240,208,0.25);
  border-radius: 4px;
  padding: 2px 7px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Recent seeds */
.recent-seeds-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.seed-chip {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(63,240,208,0.07);
  border: 1px solid rgba(63,240,208,0.2);
  border-radius: 20px;
  padding: 4px 12px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.seed-chip:hover { background: rgba(63,240,208,0.15); border-color: var(--cyan); }

/* ── Death screen ── */
.death-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 460px;
  max-width: 95vw;
  max-height: 95vh;
  overflow-y: auto;
  padding: 32px 28px;
  background: var(--surf);
  border: 1px solid #1e1e50;
  border-radius: var(--r);
  box-shadow: 0 0 60px rgba(255,110,170,0.08), 0 8px 40px rgba(0,0,0,0.5);
}
.death-title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1.8rem;
  color: var(--pink);
  letter-spacing: 4px;
  text-shadow: 0 0 20px rgba(255,110,170,0.5);
}
.death-stats {
  display: flex;
  gap: 20px;
  width: 100%;
}
.stat-block {
  flex: 1;
  background: var(--surf2);
  border: 1px solid #1e1e50;
  border-radius: var(--r);
  padding: 14px;
  text-align: center;
}
.stat-label {
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 2px;
  margin-bottom: 6px;
}
.stat-value {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1.6rem;
  letter-spacing: 2px;
  line-height: 1;
}
.stat-value.cyan { color: var(--cyan); text-shadow: 0 0 12px rgba(63,240,208,0.4); }
.stat-value.yellow { color: var(--yellow); text-shadow: 0 0 12px rgba(255,208,96,0.4); }

/* Leaderboard */
.lb-box {
  width: 100%;
  background: var(--surf2);
  border: 1px solid #1e1e50;
  border-radius: var(--r);
  padding: 14px 16px;
}
.lb-seed-label {
  color: var(--cyan);
  font-size: 0.65rem;
  font-family: 'Share Tech Mono', monospace;
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: none;
}
.lb-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
  max-height: 160px;
  overflow-y: auto;
  padding-right: 4px;
}
.lb-list::-webkit-scrollbar { width: 4px; }
.lb-list::-webkit-scrollbar-track { background: transparent; }
.lb-list::-webkit-scrollbar-thumb { background: #2a2a60; border-radius: 2px; }
.lb-entry {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 8px;
  border-radius: 6px;
  font-size: 0.82rem;
  transition: background 0.15s;
}
.lb-entry:hover { background: rgba(255,255,255,0.03); }
.lb-entry.lb-gold { background: rgba(255,208,96,0.07); }
.lb-rank {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--muted);
  width: 22px;
  text-align: right;
  flex-shrink: 0;
}
.lb-entry.lb-gold .lb-rank { color: var(--yellow); }
.lb-score {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text);
  flex: 1;
}
.lb-entry.lb-gold .lb-score { color: var(--yellow); }
.lb-date {
  font-size: 0.68rem;
  color: var(--muted);
}
.lb-new-tag {
  font-size: 0.6rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  color: var(--green);
  background: rgba(64,232,122,0.1);
  border: 1px solid rgba(64,232,122,0.3);
  border-radius: 4px;
  padding: 1px 5px;
  letter-spacing: 1px;
}

/* Death actions */
.death-actions {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.death-actions .btn-row {
  display: flex;
  gap: 8px;
}

/* Scrollbar for death inner */
.death-inner::-webkit-scrollbar { width: 4px; }
.death-inner::-webkit-scrollbar-track { background: transparent; }
.death-inner::-webkit-scrollbar-thumb { background: #2a2a60; border-radius: 2px; }