:root {
  --bg-deep: #06141b;
  --bg-pond: #0b242e;
  --glass-bg: rgba(9, 28, 36, 0.74);
  --glass-border: rgba(140, 235, 220, 0.15);
  --glass-highlight: rgba(140, 235, 220, 0.3);
  --text-main: #eef9f7;
  --text-muted: #8ab3ad;
  --accent-taiko: #2ec4b6;
  --accent-handpan: #56cfe1;
  --accent-marimba: #f4a261;
  --accent-bamboo: #80ed99;
  --accent-lotus: #ff8fa3;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-sans);
}

#pond-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  cursor: crosshair;
  z-index: 1;
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Start Overlay */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(10, 36, 46, 0.8), rgba(4, 14, 20, 0.95));
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.overlay-card {
  max-width: 570px;
  padding: 2.5rem 2.75rem;
  text-align: center;
  background: rgba(11, 33, 43, 0.88);
  border: 1px solid rgba(86, 207, 225, 0.3);
  border-radius: 24px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.65), 0 0 40px rgba(46, 196, 182, 0.12);
}

.lotus-emblem {
  font-size: 3.1rem;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 4px 14px rgba(255, 143, 163, 0.45));
  animation: bobLotus 3.6s ease-in-out infinite;
}

@keyframes bobLotus {
  0%, 100% { transform: translateY(0px) scale(1); }
  50% { transform: translateY(-6px) scale(1.04); }
}

.overlay-card h1 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 400;
  color: #e6fcf9;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--accent-handpan);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.description {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.feature-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1.8rem;
}

.feature-pills span {
  font-size: 0.78rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(86, 207, 225, 0.08);
  border: 1px solid rgba(86, 207, 225, 0.2);
  color: #d6f5f2;
}

.primary-btn {
  background: linear-gradient(135deg, #2ec4b6, #56cfe1);
  color: #051921;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 0.85rem 2.4rem;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(46, 196, 182, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 30px rgba(86, 207, 225, 0.5);
}

/* HUD Top */
.hud-top {
  position: fixed;
  top: 14px;
  left: 16px;
  right: 16px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  pointer-events: none;
}

.hud-top > * {
  pointer-events: auto;
}

.brand-panel {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
}

.brand-icon {
  font-size: 1.45rem;
}

.brand-panel h2 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  color: #e6fcf9;
}

.status-badge {
  font-size: 0.7rem;
  color: var(--accent-handpan);
  display: block;
}

.telemetry-panel {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 8px 18px;
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 78px;
}

.telemetry-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.telemetry-value {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 92px;
  accent-color: var(--accent-handpan);
  cursor: pointer;
}

.controls-panel {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
}

.control-group {
  display: flex;
  flex-direction: column;
  padding: 0 6px;
}

.control-label {
  font-size: 0.63rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

select {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-main);
  border: 1px solid rgba(140, 235, 220, 0.2);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.8rem;
  outline: none;
  cursor: pointer;
}

select option {
  background: #0b242e;
  color: var(--text-main);
}

.hud-btn {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-main);
  border: 1px solid rgba(140, 235, 220, 0.18);
  border-radius: 8px;
  padding: 7px 11px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.hud-btn:hover {
  background: rgba(140, 235, 220, 0.16);
  border-color: var(--glass-highlight);
}

.hud-btn.active {
  background: rgba(86, 207, 225, 0.24);
  border-color: var(--accent-handpan);
  color: #d8f9ff;
  box-shadow: 0 0 14px rgba(86, 207, 225, 0.3);
}

.icon-btn {
  width: 32px;
  height: 32px;
  justify-content: center;
  padding: 0;
  border-radius: 50%;
}

/* Bottom HUD */
.hud-bottom {
  position: fixed;
  bottom: 14px;
  left: 16px;
  right: 16px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.hud-bottom > * {
  pointer-events: auto;
}

.instrument-dock {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.inst-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(140, 235, 220, 0.12);
  border-radius: 10px;
  padding: 7px 12px;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.18s ease;
}

.inst-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.inst-btn.active {
  background: rgba(86, 207, 225, 0.16);
  border-color: rgba(140, 235, 220, 0.45);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
  transform: translateY(-2px);
}

.lily-dot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  display: inline-block;
}

.taiko-dot { background: var(--accent-taiko); box-shadow: 0 0 8px var(--accent-taiko); }
.handpan-dot { background: var(--accent-handpan); box-shadow: 0 0 8px var(--accent-handpan); }
.marimba-dot { background: var(--accent-marimba); box-shadow: 0 0 8px var(--accent-marimba); }
.bamboo-dot { background: var(--accent-bamboo); box-shadow: 0 0 8px var(--accent-bamboo); }
.droplet-dot { background: var(--accent-lotus); box-shadow: 0 0 8px var(--accent-lotus); }

.inst-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.inst-name {
  font-size: 0.78rem;
  font-weight: 600;
}

.inst-type {
  font-size: 0.67rem;
  color: var(--text-muted);
}

kbd {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 4px;
  padding: 1px 5px;
  color: #e2f5f2;
}

.keyboard-dock {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px 16px;
  font-size: 0.74rem;
  flex-wrap: wrap;
  justify-content: center;
}

.shortcut-hints {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.shortcut-hints strong {
  color: var(--text-main);
}

/* Help Modal */
.glass-dialog {
  margin: auto;
  max-width: 680px;
  width: 92%;
  background: rgba(8, 26, 34, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-highlight);
  border-radius: 18px;
  color: var(--text-main);
  padding: 1.5rem;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.75);
}

.glass-dialog::backdrop {
  background: rgba(3, 10, 14, 0.68);
  backdrop-filter: blur(4px);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--glass-border);
}

.dialog-header h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.3rem;
  color: #e6fcf9;
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.guide-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 1rem 1.15rem;
}

.guide-card h4 {
  color: var(--accent-handpan);
  margin-bottom: 0.65rem;
  font-size: 0.92rem;
}

.guide-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-size: 0.82rem;
  line-height: 1.45;
  color: #cfe8e4;
}

@media (max-width: 980px) {
  .hud-top {
    flex-wrap: wrap;
    justify-content: center;
  }
  .guide-grid {
    grid-template-columns: 1fr;
  }
}