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

html, body, #app {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0b0f14;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: #e8eef5;
}

#application-canvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
  cursor: crosshair;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 12, 18, 0.72);
  pointer-events: none;
  z-index: 2;
}

.overlay[hidden],
#hud[hidden] { display: none !important; }

#overlay-card {
  pointer-events: auto;
  width: min(420px, 92vw);
  background: rgba(12, 18, 26, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 18px 18px 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

#overlay-title {
  font-size: 16px;
  font-weight: 650;
  margin-bottom: 10px;
}

#overlay-detail {
  font-size: 13px;
  line-height: 1.4;
  color: #b7c4d4;
  word-break: break-word;
}

#progress-wrap {
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin: 0 0 10px;
}

#progress-bar {
  height: 100%;
  width: 0%;
  background: #3b82f6;
  border-radius: inherit;
  transition: width 120ms linear;
}

.overlay.error #overlay-card {
  border-color: rgba(248, 113, 113, 0.45);
}

.overlay.error #overlay-title { color: #fecaca; }
.overlay.error #progress-wrap { display: none; }

#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 12px 14px;
  z-index: 1;
}

#status {
  align-self: flex-start;
  background: rgba(8, 12, 18, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  max-width: min(520px, 92vw);
  line-height: 1.35;
}

#controls-hint {
  align-self: flex-start;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  background: rgba(8, 12, 18, 0.6);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12px;
  color: #b7c4d4;
}

#controls-hint kbd {
  font: inherit;
  font-weight: 600;
  color: #f2f7fc;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 4px;
  padding: 1px 5px;
}

#toolbar {
  pointer-events: auto;
  align-self: flex-end;
  display: flex;
  gap: 8px;
  position: absolute;
  right: 14px;
  bottom: 14px;
}

#mode-btn,
#reset-btn,
#thumb-btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

#mode-btn { background: rgba(20, 90, 180, 0.85); }
#mode-btn:hover { background: rgba(30, 110, 210, 0.95); }
#mode-btn.active { background: rgba(40, 140, 90, 0.9); }

#reset-btn { background: rgba(255, 255, 255, 0.12); }
#reset-btn:hover { background: rgba(255, 255, 255, 0.2); }

#thumb-btn { background: rgba(120, 70, 180, 0.85); }
#thumb-btn:hover { background: rgba(140, 90, 200, 0.95); }
#thumb-btn:disabled { opacity: 0.55; cursor: wait; }

body.embed #controls-hint { display: none; }

@media (max-width: 520px) {
  #toolbar { right: 10px; bottom: 10px; }
  #mode-btn, #reset-btn, #thumb-btn { padding: 8px 12px; font-size: 12px; }
}