:root {
  --bg: #12161c;
  --panel: rgba(18, 22, 28, 0.88);
  --panel-glass: rgba(22, 26, 34, 0.94);
  --border: #3a4554;
  --text: #e8eaed;
  --muted: #9aa3b2;
  --accent: #4a90c8;
  --accent-dim: #3d6f96;
  --accent-hover: #5aa0d8;
  --input: #1e2630;
  --settings-w: min(420px, 48vw);
  /* старт / пауза / конец игры / уровень пройден — одинаковый scrim */
  --overlay-scrim: rgba(18, 22, 28, 0.55);
  font-family: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
}

.app {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.layer {
  position: absolute;
  inset: 0;
}

.layer--game {
  z-index: 0;
}

.layer--ui {
  z-index: 1;
  pointer-events: none;
}

.layer--ui > * {
  pointer-events: auto;
}

#stage {
  display: block;
  width: 100%;
  height: 100%;
  background: #0e1218;
}

.layer--game.is-gameover #stage {
  filter: grayscale(1);
}

.gameover {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--overlay-scrim);
  pointer-events: auto;
}

.gameover[hidden] {
  display: none;
}

.pause {
  position: absolute;
  inset: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.pause[hidden] {
  display: none;
}

.pause__title {
  margin: 0;
  padding: 0.75rem 1.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
  background: var(--panel-glass);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.pause__title--ready {
  text-align: center;
  line-height: 1.35;
}

.pause__start {
  display: inline-block;
  font-size: 1.75em;
  letter-spacing: 0.08em;
  line-height: 1.15;
  color: #6eb6ef;
}

.gameover__box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 2rem;
  background: var(--panel-glass);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.gameover__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

#btn-restart {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  padding: 0.55rem 1.4rem;
  font-size: 0.95rem;
}

#btn-restart:hover {
  background: var(--accent-hover);
}

.level-banner {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  background: transparent;
}

.level-banner.is-dimmed {
  background: var(--overlay-scrim);
}

.level-banner[hidden] {
  display: none;
}

.level-banner__box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 1.1rem 1.75rem 1.25rem;
  color: var(--text);
  background: var(--panel-glass);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  text-align: center;
}

.level-banner__line {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.level-banner__num {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  line-height: 1.15;
  color: #7ec8ea;
}

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  padding: 10px 16px;
  background: var(--panel-glass);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.topbar h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.stats {
  display: flex;
  gap: 16px;
  color: var(--muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.stats strong {
  color: var(--text);
  font-weight: 600;
}

.topbar__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

button {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--input);
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent-dim);
}

button:active {
  transform: translateY(1px);
}

#btn-generate {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

#btn-generate:hover {
  background: var(--accent-hover);
}

button.is-active {
  border-color: var(--accent);
  background: #2f3a48;
}

/* ---- Settings drawer ---- */
.settings {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: var(--settings-w);
  z-index: 7;
  display: flex;
  flex-direction: column;
  background: var(--panel-glass);
  backdrop-filter: blur(12px);
  border-left: 1px solid var(--border);
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.35);
  transform: translateX(105%);
  transition: transform 0.22s ease;
  overflow: hidden;
}

.settings.is-open {
  transform: translateX(0);
}

.settings__head {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.55rem;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--border);
}

.settings__head > strong {
  font-size: 0.85rem;
  margin-right: 0.25rem;
}

.profiles {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem;
  flex: 1 1 auto;
}

.profiles__label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  color: var(--muted);
}

.profiles__label select {
  min-width: 7rem;
  max-width: 10rem;
  padding: 0.2rem 0.35rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--input);
  color: var(--text);
  font: inherit;
  font-size: 0.78rem;
}

.profiles button {
  padding: 0.25rem 0.5rem;
  font-size: 0.72rem;
}

.settings__close {
  margin-left: auto;
}

.settings__tabs {
  flex: 0 0 auto;
  display: flex;
  gap: 0.3rem;
  padding: 0.45rem 0.65rem;
  border-bottom: 1px solid var(--border);
}

.settings__tab {
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
}

.settings__tab.is-active {
  border-color: var(--accent);
  color: var(--text);
  background: #2f3a48;
}

.settings__body {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 0.75rem;
}

.settings-pane {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem 0.75rem;
  align-content: start;
}

.settings-pane.is-active {
  display: grid;
}

.settings-pane__hint {
  grid-column: 1 / -1;
  margin: 0 0 0.15rem;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.35;
}

.settings-group {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem 0.75rem;
  margin: 0;
  padding: 0.55rem 0.65rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.15);
}

.settings-group__title {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.settings-group__hint {
  grid-column: 1 / -1;
  margin: -0.15rem 0 0;
  font-size: 0.72rem;
  color: var(--muted);
  opacity: 0.85;
  line-height: 1.3;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.control input,
.control select {
  width: 100%;
  padding: 0.35rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--input);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.settings-group--from {
  grid-template-columns: 1fr;
}

.from-row {
  display: grid;
  grid-template-columns: 4.5rem minmax(4.5rem, 1fr) minmax(3.5rem, 0.85fr);
  gap: 0.45rem 0.55rem;
  align-items: end;
}

.from-row__name {
  font-size: 0.78rem;
  color: var(--muted);
  padding-bottom: 0.4rem;
}

.control--inline {
  min-width: 0;
}

@media (max-width: 700px) {
  :root {
    --settings-w: min(100vw, 360px);
  }

  .settings-pane,
  .settings-group {
    grid-template-columns: 1fr;
  }
}