:root {
  --paper: #f1f2ef;
  --paper-2: #e6e8e3;
  --ink: #2c2c2b;
  --ink-soft: #6c7069;
  --line: #d3d6d0;
  --danger: #171512;
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.app {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at 20% 15%, rgba(255,255,255,0.5), transparent 40%),
    radial-gradient(circle at 80% 85%, rgba(0,0,0,0.025), transparent 45%),
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='56'%20height='56'%3E%3Ccircle%20cx='28'%20cy='28'%20r='24'%20fill='rgba(255,255,255,0.45)'%20stroke='rgba(130,138,138,0.16)'%20stroke-width='1'/%3E%3Ccircle%20cx='28'%20cy='26.3'%20r='24'%20fill='none'%20stroke='rgba(255,255,255,0.7)'%20stroke-width='1'%20opacity='0.6'/%3E%3Cellipse%20cx='19.5'%20cy='18'%20rx='6.5'%20ry='4.5'%20fill='rgba(255,255,255,0.8)'/%3E%3C/svg%3E"),
    var(--paper);
  background-repeat: no-repeat, no-repeat, repeat;
  background-size: auto, auto, 56px 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--line);
}

.title {
  margin: 0;
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.32em;
}

.controls { display: flex; gap: 8px; }

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.35);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}
.icon-btn:active { transform: scale(0.92); }
.icon-btn:hover { background: rgba(255,255,255,0.6); }

.stats {
  display: flex;
  padding: 14px 20px 12px;
  gap: 0;
}
.stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  border-left: 1px solid var(--line);
  padding: 0 8px;
}
.stat:first-child { border-left: none; padding-left: 0; }
.stat-label {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  font-weight: 600;
}
.stat-value {
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 22px;
  font-weight: 600;
  margin-top: 2px;
  letter-spacing: 0.02em;
}
.stat-sub {
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-top: 2px;
}

.notice {
  align-self: center;
  margin: 4px 20px 10px;
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--ink-soft);
  background: rgba(255,255,255,0.3);
  text-align: center;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.notice.warn {
  color: var(--danger);
  border-color: var(--danger);
  background: rgba(0,0,0,0.05);
}
.notice.good {
  color: #3f6b3f;
  border-color: #8fae8f;
  background: rgba(90,150,90,0.08);
}

.challenge {
  display: block;
  width: fit-content;
  max-width: calc(100% - 40px);
  margin: 0 auto 10px;
  padding: 8px 16px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font: inherit;
  font-size: 11px;
  letter-spacing: 0.05em;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
}
.challenge:active { transform: scale(0.97); }
.challenge.hidden { display: none; }

.playfield {
  position: relative;
  flex: 1;
  margin: 0 8px;
  overflow: hidden;
  touch-action: none;
}

.bubble {
  position: absolute;
  left: 0;
  top: 0;
  border-radius: 50%;
  will-change: transform;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bubble .shell {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255,255,255,0.9), rgba(255,255,255,0.15) 35%, rgba(255,255,255,0.02) 55%),
    radial-gradient(circle at 65% 70%, rgba(0,0,0,0.05), transparent 60%),
    rgba(255,255,255,0.06);
  border: 1px solid rgba(60,55,45,0.22);
  box-shadow:
    inset 0 2px 6px rgba(255,255,255,0.55),
    inset 0 -4px 8px rgba(0,0,0,0.06),
    0 3px 6px rgba(0,0,0,0.10);
}

.bubble .highlight {
  position: absolute;
  top: 14%;
  left: 20%;
  width: 30%;
  height: 20%;
  border-radius: 50%;
  background: rgba(255,255,255,0.85);
  filter: blur(1px);
}

/* bombs share the exact same glass look as normal bubbles — the only tell
   is the bomb-icon below, which stays hidden until the moment it's tapped */
.bomb-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #171512;
  opacity: 0;
  transform: scale(0.3);
  transition: opacity 0.16s ease, transform 0.16s ease;
}
.bubble.bomb-revealed .shell {
  background: radial-gradient(circle at 35% 30%, #3a3733, #0f0d0b 65%);
  border: 1px solid rgba(0,0,0,0.5);
}
.bubble.bomb-revealed .highlight { background: rgba(255,255,255,0.18); }
.bubble.bomb-revealed .bomb-icon {
  opacity: 1;
  transform: scale(1);
  color: #f0ece2;
}

.bubble.bonus .shell {
  box-shadow:
    inset 0 2px 6px rgba(255,255,255,0.7),
    inset 0 -4px 8px rgba(0,0,0,0.05),
    0 0 0 2px rgba(44,41,36,0.14),
    0 4px 10px rgba(0,0,0,0.12);
}
.bubble.bonus::before {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px dashed rgba(44,41,36,0.35);
  animation: spin-ring 6s linear infinite;
}
@keyframes spin-ring {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.bubble.popping {
  animation: pop-out 0.28s ease-out forwards;
  pointer-events: none;
}
.bubble.spawning {
  animation: spawn-in 0.32s ease-out forwards;
}
.bubble.defusing {
  animation: defuse-out 0.5s ease-in forwards;
  pointer-events: none;
}
.bubble.exploding {
  animation: explode 0.4s ease-out forwards;
  pointer-events: none;
}

@keyframes pop-out {
  0% { transform: var(--tf) scale(1); opacity: 1; }
  40% { transform: var(--tf) scale(1.18); opacity: 1; }
  100% { transform: var(--tf) scale(0); opacity: 0; }
}
@keyframes spawn-in {
  0% { transform: var(--tf) scale(0); opacity: 0; }
  100% { transform: var(--tf) scale(1); opacity: 1; }
}
@keyframes defuse-out {
  0% { transform: var(--tf) scale(1); opacity: 1; }
  60% { transform: var(--tf) scale(0.85); opacity: 0.8; }
  100% { transform: var(--tf) scale(0.2); opacity: 0; }
}
@keyframes explode {
  0% { transform: var(--tf) scale(1); opacity: 1; }
  30% { transform: var(--tf) scale(2.4); opacity: 1; }
  100% { transform: var(--tf) scale(3.2); opacity: 0; }
}

.float-pop {
  position: absolute;
  transform: translate(-50%, -50%);
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  pointer-events: none;
  animation: float-up 0.75s ease-out forwards;
}
@keyframes float-up {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.7); }
  20% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
  100% { opacity: 0; transform: translate(-50%, -90px) scale(1); }
}

.pop-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(44,41,36,0.5);
  pointer-events: none;
  animation: ring-burst 0.5s ease-out forwards;
}
@keyframes ring-burst {
  0% { transform: translate(-50%, -50%) scale(0.6); opacity: 0.9; }
  100% { transform: translate(-50%, -50%) scale(1.9); opacity: 0; }
}

.screen-flash {
  position: absolute;
  inset: 0;
  background: #000;
  opacity: 0;
  pointer-events: none;
  z-index: 5;
  animation: flash 0.4s ease-out forwards;
}
@keyframes flash {
  0% { opacity: 0; }
  15% { opacity: 0.85; }
  100% { opacity: 0; }
}

.legend {
  display: flex;
  border-top: 1px solid var(--line);
  padding: 14px 20px 20px;
}
.legend-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  border-left: 1px solid var(--line);
  padding-left: 16px;
  font-size: 11px;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
}
.legend-item:first-child { border-left: none; padding-left: 0; }

.seo-info {
  padding: 0 20px 8px;
  font-size: 9px;
  color: var(--ink-soft);
}
.seo-info summary {
  cursor: pointer;
  letter-spacing: 0.08em;
  font-weight: 600;
  list-style: none;
}
.seo-info summary::-webkit-details-marker { display: none; }
.seo-info summary::after { content: " ▾"; }
.seo-info[open] summary::after { content: " ▴"; }
.seo-info p {
  margin: 4px 0 0;
  line-height: 1.5;
  max-width: 640px;
}

.bomb-glyph {
  width: 20px;
  height: 20px;
  min-width: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 32% 28%, rgba(255,255,255,0.9), rgba(255,255,255,0.15) 35%, rgba(255,255,255,0.02) 55%),
    rgba(255,255,255,0.06);
  border: 1px solid rgba(60,55,45,0.3);
  color: #171512;
}
.bomb-glyph svg { width: 58%; height: 58%; }
.bomb-glyph.big {
  width: 64px;
  height: 64px;
  margin-bottom: 8px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.15);
}

.overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 15%, rgba(255,255,255,0.5), transparent 40%),
    radial-gradient(circle at 80% 85%, rgba(0,0,0,0.025), transparent 45%),
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='224'%20height='224'%3E%3Ccircle%20cx='28.0'%20cy='28.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M22.0%2025.0%20L33.0%2030.0%20M24.0%2033.0%20L34.0%2024.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='84.0'%20cy='28.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M78.0%2025.0%20L89.0%2030.0%20M80.0%2033.0%20L90.0%2024.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='140.0'%20cy='28.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M134.0%2025.0%20L145.0%2030.0%20M136.0%2033.0%20L146.0%2024.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='196.0'%20cy='28.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M190.0%2025.0%20L201.0%2030.0%20M192.0%2033.0%20L202.0%2024.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='28.0'%20cy='84.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M22.0%2081.0%20L33.0%2086.0%20M24.0%2089.0%20L34.0%2080.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='84.0'%20cy='84.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M78.0%2081.0%20L89.0%2086.0%20M80.0%2089.0%20L90.0%2080.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='140.0'%20cy='84.0'%20r='24'%20fill='rgba(255,255,255,0.45)'%20stroke='rgba(130,138,138,0.16)'%20stroke-width='1'/%3E%3Ccircle%20cx='140.0'%20cy='82.3'%20r='24'%20fill='none'%20stroke='rgba(255,255,255,0.7)'%20stroke-width='1'%20opacity='0.6'/%3E%3Cellipse%20cx='131.5'%20cy='74.0'%20rx='6.5'%20ry='4.5'%20fill='rgba(255,255,255,0.8)'/%3E%3Ccircle%20cx='196.0'%20cy='84.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M190.0%2081.0%20L201.0%2086.0%20M192.0%2089.0%20L202.0%2080.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='28.0'%20cy='140.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M22.0%20137.0%20L33.0%20142.0%20M24.0%20145.0%20L34.0%20136.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='84.0'%20cy='140.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M78.0%20137.0%20L89.0%20142.0%20M80.0%20145.0%20L90.0%20136.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='140.0'%20cy='140.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M134.0%20137.0%20L145.0%20142.0%20M136.0%20145.0%20L146.0%20136.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='196.0'%20cy='140.0'%20r='24'%20fill='rgba(255,255,255,0.45)'%20stroke='rgba(130,138,138,0.16)'%20stroke-width='1'/%3E%3Ccircle%20cx='196.0'%20cy='138.3'%20r='24'%20fill='none'%20stroke='rgba(255,255,255,0.7)'%20stroke-width='1'%20opacity='0.6'/%3E%3Cellipse%20cx='187.5'%20cy='130.0'%20rx='6.5'%20ry='4.5'%20fill='rgba(255,255,255,0.8)'/%3E%3Ccircle%20cx='28.0'%20cy='196.0'%20r='24'%20fill='rgba(255,255,255,0.45)'%20stroke='rgba(130,138,138,0.16)'%20stroke-width='1'/%3E%3Ccircle%20cx='28.0'%20cy='194.3'%20r='24'%20fill='none'%20stroke='rgba(255,255,255,0.7)'%20stroke-width='1'%20opacity='0.6'/%3E%3Cellipse%20cx='19.5'%20cy='186.0'%20rx='6.5'%20ry='4.5'%20fill='rgba(255,255,255,0.8)'/%3E%3Ccircle%20cx='84.0'%20cy='196.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M78.0%20193.0%20L89.0%20198.0%20M80.0%20201.0%20L90.0%20192.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='140.0'%20cy='196.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M134.0%20193.0%20L145.0%20198.0%20M136.0%20201.0%20L146.0%20192.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3Ccircle%20cx='196.0'%20cy='196.0'%20r='23'%20fill='none'%20stroke='rgba(130,138,138,0.13)'%20stroke-width='1'/%3E%3Cpath%20d='M190.0%20193.0%20L201.0%20198.0%20M192.0%20201.0%20L202.0%20192.0'%20stroke='rgba(130,138,138,0.14)'%20stroke-width='1'%20stroke-linecap='round'/%3E%3C/svg%3E"),
    var(--paper);
  background-repeat: no-repeat, no-repeat, repeat;
  background-size: auto, auto, 224px 224px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.overlay.hidden { display: none; }

.overlay-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
}
.overlay-card h2 {
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  letter-spacing: 0.15em;
  margin: 0 0 10px;
  font-size: 24px;
}
.go-line { font-size: 11px; letter-spacing: 0.12em; color: var(--ink-soft); margin: 4px 0 0; }
.go-score {
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 44px;
  font-weight: 700;
  margin: 2px 0 4px;
}
.go-sub { font-size: 11px; letter-spacing: 0.1em; color: var(--ink-soft); margin: 0 0 4px; }
.go-sub:last-of-type { margin-bottom: 18px; }
.go-global.hidden { display: none; }
.go-global.new-global { color: var(--ink); font-weight: 800; letter-spacing: 0.14em; }

.btn {
  font-family: inherit;
  letter-spacing: 0.1em;
  font-size: 12px;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 10px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
}
.btn:active { transform: scale(0.96); }
.btn.ghost {
  background: transparent;
  color: var(--ink);
  margin-top: 8px;
}

.panel {
  position: absolute;
  inset: 0;
  background: rgba(20,18,15,0.35);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 10;
}
.panel.hidden { display: none; }
.panel-card {
  width: 100%;
  max-width: 480px;
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-radius: 18px 18px 0 0;
  padding: 18px 22px 26px;
}
.panel-row-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.panel-row-title h2 {
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  letter-spacing: 0.15em;
  font-size: 15px;
  margin: 0;
}
.panel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.toggle {
  width: 42px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.08);
  position: relative;
  cursor: pointer;
  padding: 0;
}
.toggle-dot {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,0.3);
  transition: left 0.15s ease;
}
.toggle.on { background: var(--ink); }
.toggle.on .toggle-dot { left: 22px; }

/* Phones: the header/stats/notice/legend chrome was eating close to half the
   screen, leaving too little room to actually tap bubbles. Shrink all of it
   and respect notch/home-indicator safe areas so the playfield (flex: 1)
   gets almost everything instead. */
@media (max-width: 640px) {
  .topbar {
    padding: max(8px, env(safe-area-inset-top)) 14px 6px;
  }
  .title { font-size: 13px; letter-spacing: 0.2em; }
  .icon-btn { width: 30px; height: 30px; border-radius: 8px; }
  .icon-btn svg { width: 15px; height: 15px; }

  .stats { padding: 4px 14px; }
  .stat-label { font-size: 8.5px; letter-spacing: 0.08em; }
  .stat-value { font-size: 16px; margin-top: 1px; }
  .stat-sub { display: none; }

  .notice {
    margin: 2px 14px 6px;
    padding: 4px 10px;
    font-size: 9.5px;
    letter-spacing: 0.05em;
  }

  .legend {
    padding: 6px 14px 4px;
  }
  .legend-item { gap: 6px; padding-left: 10px; font-size: 8.5px; line-height: 1.2; }
  .legend-item svg { width: 14px; height: 14px; }
  .bomb-glyph { width: 14px; height: 14px; min-width: 14px; }

  .challenge { margin: 0 auto 6px; padding: 6px 12px; font-size: 9.5px; }

  .seo-info {
    padding: 0 14px max(6px, env(safe-area-inset-bottom));
    font-size: 8px;
  }
}