/* ANTINODE — synthwave styling, mobile-first. */
:root {
  --bg: #05030f;
  --panel: rgba(10, 12, 34, 0.72);
  --panel-line: rgba(120, 90, 220, 0.35);
  --cyan: #2ff6ff;
  --magenta: #ff39d6;
  --gold: #ffd24a;
  --green: #7cffb2;
  --text: #e9f0ff;
  --dim: #9aa6e0;
  --font: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

/* touch-action: manipulation kills double-tap-to-zoom (the buttons get rapid taps).
   user-select: none stops rapid taps from selecting text. The canvas overrides
   touch-action to `none` below. */
* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overscroll-behavior: none;
  touch-action: manipulation;
}

#app {
  position: fixed;
  inset: 0;
  display: block;
}

#screen {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

/* ---- HUD ---- */
#hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: max(10px, env(safe-area-inset-top)) 14px 10px;
  pointer-events: none;
  gap: 10px;
}
.hud-left { display: flex; flex-direction: column; gap: 4px; }
#level-tag {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 3px;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(47, 246, 255, 0.7);
  pointer-events: auto;
  cursor: pointer;
}
#difficulty { font-size: 13px; color: var(--gold); letter-spacing: 2px; text-shadow: 0 0 10px rgba(255,210,74,0.6); }
#status {
  text-align: right;
  font-size: 11px;
  line-height: 1.5;
  color: var(--dim);
  max-width: 52%;
}
#status .ok { color: var(--green); }
#status .bad { color: var(--magenta); }

/* ---- toast / hint message ---- */
.toast {
  position: absolute;
  top: 64px; left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 12px;
  color: var(--text);
  max-width: 86%;
  text-align: center;
  z-index: 6;
  box-shadow: 0 0 30px rgba(124, 255, 178, 0.15);
  backdrop-filter: blur(4px);
}

/* ---- controls ---- */
#controls {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 6px 10px max(8px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 7px;
  z-index: 5;
}

/* ---- compact playback row (pause / speed / step) ---- */
#playback {
  display: flex;
  gap: 8px;
  justify-content: center;
  align-items: center;
}
.pbtn {
  border: 1px solid var(--panel-line);
  background: var(--panel);
  color: var(--cyan);
  font-family: var(--font);
  font-size: 12px;
  padding: 7px 12px;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  backdrop-filter: blur(6px);
}
.pbtn:active { background: rgba(80, 60, 160, 0.7); }
#btn-speed { min-width: 44px; text-align: center; }

#emitter-panel {
  align-self: center;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 14px;
  padding: 8px 12px;
  backdrop-filter: blur(6px);
  box-shadow: 0 0 26px rgba(47, 246, 255, 0.12);
}
.ep-name { font-size: 12px; color: var(--cyan); letter-spacing: 1px; }
.ep-beat { display: flex; align-items: center; gap: 10px; }
.ep-beat-val { min-width: 34px; text-align: center; font-size: 15px; color: var(--text); }
.round {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--panel-line);
  background: rgba(40, 30, 80, 0.6);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
}
.round:active { background: rgba(80, 60, 160, 0.8); }
.chip {
  border: 1px solid var(--magenta);
  background: rgba(60, 14, 50, 0.5);
  color: var(--magenta);
  border-radius: 999px;
  padding: 8px 12px;
  font-family: var(--font);
  font-size: 12px;
  cursor: pointer;
}
.chip[hidden] { display: none; }
.chip.on { background: var(--magenta); color: #1a0019; box-shadow: 0 0 16px var(--magenta); }

#buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  max-width: 520px;
  width: 100%;
  margin: 0 auto;
}
.btn {
  appearance: none;
  border: 1px solid var(--panel-line);
  background: var(--panel);
  color: var(--text);
  font-family: var(--font);
  font-size: 11.5px;
  padding: 7px 4px;
  border-radius: 9px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: transform 0.05s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn:hover { box-shadow: 0 0 18px rgba(47, 246, 255, 0.25); }
.btn.primary {
  grid-column: 1 / -1;
  border-color: var(--green);
  color: #061a10;
  background: var(--green);
  box-shadow: 0 0 24px rgba(124, 255, 178, 0.45);
  font-weight: 700;
}
.btn[hidden] { display: none; }

/* ---- overlay (intro / win / level select) ---- */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(circle at 50% 35%, rgba(20, 8, 50, 0.86), rgba(5, 3, 15, 0.96));
  backdrop-filter: blur(3px);
}
.overlay[hidden] { display: none; }
.card {
  width: min(560px, 94vw);
  max-height: 88vh;
  overflow: auto;
  border: 1px solid var(--panel-line);
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(24, 16, 54, 0.92), rgba(8, 6, 24, 0.95));
  padding: 22px;
  box-shadow: 0 0 60px rgba(255, 57, 214, 0.25), inset 0 0 40px rgba(47, 246, 255, 0.05);
}
.card h1 {
  margin: 0 0 4px;
  font-size: 34px;
  letter-spacing: 8px;
  color: var(--cyan);
  text-shadow: 0 0 20px rgba(47, 246, 255, 0.8), 0 0 40px rgba(255, 57, 214, 0.5);
}
.card .tag { color: var(--magenta); letter-spacing: 2px; font-size: 12px; margin-bottom: 14px; }
.card p { color: var(--dim); font-size: 13px; line-height: 1.6; }
.card .big { color: var(--text); font-size: 14px; }
.card .legend { display: grid; gap: 6px; margin: 12px 0; font-size: 12px; color: var(--text); }
.card .legend b { color: var(--gold); }
.win-stars { font-size: 26px; color: var(--gold); letter-spacing: 6px; text-shadow: 0 0 18px rgba(255,210,74,0.7); }

.level-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; margin-top: 12px; }
.level-cell {
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  padding: 12px;
  cursor: pointer;
  background: rgba(30, 20, 64, 0.5);
}
.level-cell:hover { box-shadow: 0 0 18px rgba(47,246,255,0.3); }
.level-cell .n { font-size: 13px; color: var(--cyan); letter-spacing: 1px; }
.level-cell .s { color: var(--gold); font-size: 12px; }
.level-cell.done { border-color: var(--green); }
.level-cell.done .n::after { content: " ✓"; color: var(--green); }

.row { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.row .btn { flex: 1; min-width: 120px; }

/* ---- help button in HUD ---- */
.hud-right-wrap { display: flex; align-items: flex-start; gap: 8px; pointer-events: none; }
.hud-help {
  pointer-events: auto;
  width: 30px; height: 30px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid var(--panel-line);
  background: var(--panel);
  color: var(--cyan);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  backdrop-filter: blur(6px);
}
.hud-help:hover { box-shadow: 0 0 14px rgba(47, 246, 255, 0.4); }

/* ---- tutorial coach bubble ---- */
#coach {
  position: absolute;
  top: 74px; left: 50%;
  transform: translateX(-50%);
  width: min(560px, 92%);
  z-index: 12;
  background: var(--panel);
  border: 1px solid var(--green);
  border-radius: 14px;
  padding: 12px 16px;
  text-align: center;
  backdrop-filter: blur(6px);
  box-shadow: 0 0 32px rgba(124, 255, 178, 0.22);
}
#coach[hidden] { display: none; }
.coach-text { color: var(--text); font-size: 14px; line-height: 1.55; }
.coach-row { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; gap: 10px; }
.coach-skip {
  background: none; border: none; color: var(--dim);
  font-family: var(--font); font-size: 12px; cursor: pointer; text-decoration: underline;
}
.coach-next { padding: 8px 16px; }
.coach-next[hidden] { display: none; }

/* ---- legend / glossary ---- */
.legend-table { width: 100%; border-collapse: collapse; margin: 10px 0; }
.legend-table td { padding: 5px 6px; font-size: 12px; vertical-align: top; border-bottom: 1px solid rgba(120, 90, 220, 0.18); }
.legend-table td.sym { width: 30px; text-align: center; font-size: 16px; color: var(--gold); white-space: nowrap; }
.legend-table td.sym.cy { color: var(--cyan); }
.legend-table td.sym.mg { color: var(--magenta); }
.legend-table td.sym.hz { color: var(--hazard); }
.legend-table td.sym.nd { color: var(--node); }
.legend h2 { color: var(--cyan); font-size: 14px; letter-spacing: 2px; margin: 16px 0 2px; }

/* ---- attract mode (self-playing demo) ---- */
#attract {
  position: absolute;
  inset: 0;
  z-index: 15;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
#attract[hidden] { display: none; }
.attract-banner {
  margin-top: 11vh;
  text-align: center;
  padding: 0 20px;
}
.attract-kicker {
  color: var(--magenta);
  letter-spacing: 4px;
  font-size: 11px;
  margin-bottom: 10px;
  text-shadow: 0 0 12px var(--magenta);
}
.attract-caption {
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
  max-width: 520px;
  margin: 0 auto;
  min-height: 3em;
  text-shadow: 0 0 14px rgba(47, 246, 255, 0.45);
  transition: opacity 0.25s ease;
}
.attract-prompt {
  text-align: center;
  margin-bottom: 28vh;
  color: var(--cyan);
  letter-spacing: 3px;
  font-size: 13px;
  text-shadow: 0 0 12px var(--cyan);
  animation: attract-blink 1.1s steps(2, start) infinite;
}
@keyframes attract-blink { 50% { opacity: 0.2; } }

/* ---- larger screens: roomier controls ---- */
@media (min-width: 720px) {
  #level-tag { font-size: 18px; }
  #status { font-size: 12px; }
  .btn { font-size: 12px; padding: 8px 8px; }
}

/* ---- landscape phones: compress vertical chrome ---- */
@media (max-height: 520px) and (orientation: landscape) {
  #buttons { grid-template-columns: repeat(8, 1fr); max-width: 760px; }
  .btn.primary { grid-column: auto; }
}