:root {
  --bg: #05060f;
  --panel: rgba(10, 14, 32, 0.85);
  --accent: #00f0ff;
  --text: #e8ecff;
  --dim: #7a82b8;
  --danger: #ff2d78;
}

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

body {
  background: var(--bg);
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  user-select: none;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 20%, rgba(0, 240, 255, 0.06), transparent),
    radial-gradient(ellipse 40% 40% at 80% 80%, rgba(255, 45, 120, 0.05), transparent);
  pointer-events: none;
}

#wrap {
  position: relative;
}

canvas#game {
  display: block;
  background: var(--bg);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 12px;
  box-shadow:
    0 0 30px rgba(0, 240, 255, 0.15),
    0 0 90px rgba(0, 240, 255, 0.08),
    inset 0 0 60px rgba(0, 0, 0, 0.6);
}

#hud {
  position: absolute;
  top: 14px;
  left: 20px;
  right: 20px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--dim);
  text-transform: uppercase;
  pointer-events: none;
}

#hud .hud-item span {
  color: var(--accent);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.8);
  font-weight: 700;
  margin-left: 6px;
}

#hud .hud-item:nth-child(3) span {
  color: var(--danger);
  text-shadow: 0 0 8px rgba(255, 45, 120, 0.8);
}

#hud .hud-item:nth-child(4) span.hot {
  color: #ffc83d;
  text-shadow: 0 0 10px rgba(255, 200, 61, 0.9);
}

#overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: rgba(5, 6, 15, 0.78);
  border-radius: 12px;
  backdrop-filter: blur(4px);
}

#overlay.hidden { display: none; }

#level-select {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

#level-select.hidden { display: none; }

#nickname-wrap {
  display: flex;
  gap: 10px;
  align-items: center;
}

#nickname {
  width: 180px;
  height: 36px;
  padding: 0 12px;
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.35);
  border-radius: 6px;
  color: var(--text);
  font-family: inherit;
  letter-spacing: 1px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

#nickname::placeholder {
  color: var(--dim);
}

#nickname:focus {
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

#nickname-btn {
  height: 36px;
  padding: 0 20px;
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: #04121a;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

#nickname-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.8);
}

#nickname-display {
  color: var(--accent);
  letter-spacing: 2px;
  font-size: 14px;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.7);
}

#level-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: min(500px, 86%);
}

.level-btn {
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.35);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  padding: 12px 8px 10px;
  min-height: 96px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: border-color 0.12s ease, box-shadow 0.12s ease, transform 0.12s ease;
}

.level-btn:hover:not(:disabled) {
  border-color: var(--accent);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.35);
  transform: scale(1.04);
}

.level-btn .lv {
  background: var(--accent);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  color: #04121a;
}

.level-btn .nm {
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--dim);
  text-transform: uppercase;
  text-align: center;
  line-height: 1.3;
}

.level-btn .sc {
  font-size: 11px;
  color: var(--dim);
}

.level-btn.locked {
  opacity: 0.35;
  cursor: not-allowed;
  border-color: rgba(122, 130, 184, 0.25);
}

.level-btn.locked .lv {
  background: rgba(122, 130, 184, 0.25);
  color: var(--dim);
}

#scores-btn {
  padding: 8px 16px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: #04121a;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

#scores-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.8);
}

#scores-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

#scores-view.hidden { display: none; }

#scores-title {
  color: var(--accent);
  font-size: 20px;
  letter-spacing: 6px;
  text-shadow: 0 0 14px rgba(0, 240, 255, 0.8);
}

#scores-tabs {
  display: flex;
  gap: 10px;
}

#scores-tabs .tab {
  padding: 6px 18px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--dim);
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(122, 130, 184, 0.4);
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

#scores-tabs .tab:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#scores-tabs .tab.active {
  color: #04121a;
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
}

#scores-table {
  border-collapse: collapse;
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--text);
  min-width: 420px;
}

#scores-table th {
  color: var(--accent);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 3px;
  padding: 6px 18px;
  border-bottom: 1px solid rgba(0, 240, 255, 0.35);
}

#scores-table td {
  padding: 6px 18px;
  text-align: center;
  border-bottom: 1px solid rgba(122, 130, 184, 0.15);
}

#scores-table td:first-child {
  color: var(--accent);
  font-weight: 700;
}

#scores-back {
  padding: 8px 16px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--dim);
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.35);
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.12s ease, border-color 0.12s ease;
}

#scores-back:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#overlay h1 {
  font-size: 44px;
  letter-spacing: 10px;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.9);
}

#overlay h1 .accent {
  color: var(--danger);
  text-shadow: 0 0 20px rgba(255, 45, 120, 0.9);
}

#overlay p {
  color: var(--dim);
  letter-spacing: 2px;
  font-size: 14px;
}

#overlay .key {
  display: inline-block;
  padding: 1px 8px;
  border: 1px solid var(--dim);
  border-radius: 4px;
  color: var(--text);
}

#overlay #big-text {
  font-size: 28px;
  letter-spacing: 6px;
  text-transform: uppercase;
}

#start-btn {
  margin-top: 4px;
  padding: 14px 48px;
  font-family: inherit;
  font-size: 16px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: #04121a;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

#start-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 40px rgba(0, 240, 255, 1);
}

#start-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

#nick-hint {
  color: var(--danger);
  letter-spacing: 2px;
  font-size: 12px;
  text-transform: uppercase;
}

#nickname-change {
  height: 36px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--dim);
  background: rgba(10, 14, 32, 0.85);
  border: 1px dashed rgba(122, 130, 184, 0.5);
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.12s ease, border-color 0.12s ease;
}

#nickname-change:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#kid-btn {
  margin-top: 6px;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--dim);
  background: rgba(10, 14, 32, 0.85);
  border: 1px dashed rgba(122, 130, 184, 0.5);
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

#kid-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#kid-btn.on {
  color: #04121a;
  background: var(--accent);
  border: none;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.6);
}

#sound-btn {
  position: fixed;
  bottom: 16px;
  left: 16px;
  z-index: 10;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text);
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.5);
  border-radius: 8px;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
  transition: color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

#sound-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
}

#sound-btn span {
  color: var(--accent);
  font-weight: 700;
}

#sound-btn.off {
  opacity: 0.45;
}

#sound-btn.off span {
  color: var(--danger);
}

#version {
  position: fixed;
  top: 8px;
  left: 16px;
  z-index: 10;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--dim);
  pointer-events: none;
  text-transform: uppercase;
}

#fps-log-btn {
  position: fixed;
  bottom: 66px;
  right: 16px;
  z-index: 10;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text);
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.5);
  border-radius: 8px;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
  transition: color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

#fps-log-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
}

#fps-log-btn span {
  color: var(--accent);
  font-weight: 700;
}

#fps-log-btn.off {
  opacity: 0.45;
}

#fps-log-btn.off span {
  color: var(--danger);
}

#ctrl-toggle {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 10;
  padding: 8px 16px;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text);
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.5);
  border-radius: 8px;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
  transition: color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

#ctrl-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
}

#ctrl-toggle span {
  color: var(--accent);
  font-weight: 700;
}

#pause-banner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  text-align: center;
}

#lock-hint {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 14px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--dim);
  background: rgba(10, 14, 32, 0.7);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 6px;
  pointer-events: none;
  white-space: nowrap;
}

#lock-hint.hidden { display: none; }

#pause-menu {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: rgba(5, 6, 15, 0.78);
  border-radius: 12px;
  backdrop-filter: blur(4px);
}

#pause-menu.hidden { display: none; }

#pause-menu #pause-title {
  font-size: 40px;
  letter-spacing: 12px;
  color: var(--accent);
  text-shadow: 0 0 24px rgba(0, 240, 255, 0.9);
  margin-bottom: 8px;
}

#pause-menu button {
  width: 260px;
  padding: 12px 0;
  font-family: inherit;
  font-size: 14px;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 800;
  color: #04121a;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

#pause-menu button:hover {
  transform: scale(1.04);
  box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
}

#pause-menu #pause-restart,
#pause-menu #pause-quit {
  color: var(--text);
  background: rgba(10, 14, 32, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.35);
  box-shadow: none;
  font-weight: 700;
}

#pause-menu #pause-restart:hover,
#pause-menu #pause-quit:hover {
  border-color: var(--accent);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.3);
}

#pause-menu small {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--dim);
  text-transform: uppercase;
}