:root {
  --bg: #f4f3fb;
  --surface: #ffffff;
  --text: #191733;
  --muted: #5e5c7a;
  --border: #dddaee;
  --accent: #6b46e5;
  --accent-text: #ffffff;
  --accent-soft: #eee9ff;
  --danger: #c53030;
  --ok: #18794e;
  --ok-soft: #e3f6ec;
  --warn: #9a4a12;
  --warn-soft: #fff0e6;
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070e1f;
    --surface: #0e1830;
    --text: #eef1ff;
    --muted: #9ea8cf;
    --border: #22305a;
    --accent: #9d82ff;
    --accent-text: #0a0f22;
    --accent-soft: #241d4d;
    --danger: #ff7b7b;
    --ok: #5fd39a;
    --ok-soft: #12302a;
    --warn: #ffb68f;
    --warn-soft: #33201c;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.45;
}

button, input, select, textarea { font: inherit; color: inherit; }

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.ghost { background: transparent; }
button.icon { padding: 4px 9px; font-size: 18px; line-height: 1; background: transparent; border-color: transparent; color: var(--muted); }
button.icon:hover { color: var(--danger); border-color: var(--border); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand strong { display: block; font-size: 17px; }
.tagline { color: var(--muted); font-size: 13px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.actions select { width: auto; border: 1px solid var(--border); border-radius: 8px; padding: 7px 8px; background: var(--surface); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px 18px;
}
.card h2 { font-size: 15px; margin: 0 0 12px; }
.card h2 small { font-weight: 400; color: var(--muted); margin-left: 6px; }
.hint { color: var(--muted); font-size: 13px; margin: 12px 0 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.grid .wide { grid-column: 1 / -1; }

label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
label.inline { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 9px;
  background: var(--bg);
  font-size: 14px;
}
textarea { resize: vertical; min-height: 70px; }
input[type="checkbox"], input[type="radio"] { width: auto; accent-color: var(--accent); }
input[type="range"] { padding: 0; border: 0; background: transparent; accent-color: var(--accent); height: 28px; }
input[type="color"] { padding: 2px; height: 36px; cursor: pointer; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  padding: 20px 22px;
  width: min(560px, calc(100vw - 32px));
}
dialog::backdrop { background: rgba(7, 14, 31, .55); }
dialog h2 { margin: 0 0 14px; font-size: 18px; }
dialog .buttons { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 18px; }
dialog .buttons .left { margin-right: auto; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 50;
  pointer-events: none;
}

.site-footer { padding: 8px 24px 28px; color: var(--muted); font-size: 13px; text-align: center; }
.site-footer a { color: var(--accent); }

@media (max-width: 600px) {
  .topbar { padding: 10px 16px; }
}

/* ---------- always night ---------- */

:root {
  --bg: #070e1f;
  --surface: #0e1830;
  --text: #eef1ff;
  --muted: #9ea8cf;
  --border: #24335f;
  --accent: #9d82ff;
  --accent-text: #0a0f22;
  --accent-soft: #241d4d;
  --light: #ffd56b;
  --light-hot: #fff1b8;
  --dark-window: #131d3d;
  color-scheme: dark;
}

body { min-height: 100vh; background: linear-gradient(180deg, #050a18 0%, #0b1430 55%, #1a1450 100%); background-attachment: fixed; overflow-x: hidden; }
.sky { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.sky .twinkle { animation: twinkle 3.2s ease-in-out infinite alternate; }
@keyframes twinkle { from { opacity: .15; } to { opacity: .9; } }
body.asleep .far-light { opacity: 0; transition: opacity 1.2s; }
.topbar, .game, .site-footer { position: relative; z-index: 1; }
.topbar { background: rgba(10, 17, 40, .75); backdrop-filter: blur(8px); }
.site-footer { color: #8d97bf; }

/* ---------- game ---------- */

.game { --w: min(100%, 560px, max(300px, calc((100vh - 330px) * .78))); display: grid; justify-items: center; padding: 22px 16px 10px; }

.hud { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 12px 30px; width: min(100%, 560px); margin-bottom: 16px; }
.street { color: var(--accent); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }
.level-title h1 { margin: 2px 0 0; font-size: 28px; letter-spacing: -0.01em; }
.counters { display: flex; gap: 10px; margin: 0; }
.counters div { background: rgba(14, 24, 48, .8); border: 1px solid var(--border); border-radius: 10px; padding: 6px 12px; min-width: 70px; text-align: center; }
.counters dt { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.counters dd { margin: 0; font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }

.building-wrap { position: relative; width: var(--w); }
.roof { height: 26px; margin: 0 6%; background: #1a2550; clip-path: polygon(4% 100%, 50% 0, 96% 100%); }
.board {
  --size: 3;
  display: grid;
  grid-template-columns: repeat(var(--size), minmax(0, 1fr));
  gap: clamp(6px, 2vw, 14px);
  padding: clamp(14px, 3.5vw, 26px);
  background: linear-gradient(180deg, #1c2858, #141d42);
  border: 1px solid #2c3a72;
  border-radius: 6px 6px 0 0;
  box-shadow: 0 30px 80px rgba(107, 70, 229, .25), inset 0 1px 0 rgba(255, 255, 255, .06);
}
.door { width: 16%; height: 30px; margin: 0 auto; background: #0d1430; border: 1px solid #2c3a72; border-top: 0; border-radius: 0 0 4px 4px; }

.win-cell {
  position: relative;
  aspect-ratio: 3 / 4;
  padding: 0;
  border-radius: 6px 6px 3px 3px;
  border: 2px solid #2e3d78;
  background: var(--dark-window);
  cursor: pointer;
  transition: background .25s, box-shadow .25s, border-color .25s;
}
.win-cell:hover { border-color: var(--accent); }
.win-cell:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.pane { position: absolute; inset: 14% 12%; border-radius: 3px; background:
  linear-gradient(90deg, transparent calc(50% - 1px), rgba(0, 0, 0, .35) calc(50% - 1px), rgba(0, 0, 0, .35) calc(50% + 1px), transparent calc(50% + 1px)),
  linear-gradient(0deg, transparent calc(50% - 1px), rgba(0, 0, 0, .35) calc(50% - 1px), rgba(0, 0, 0, .35) calc(50% + 1px), transparent calc(50% + 1px)); }
.win-cell.on {
  background: radial-gradient(circle at 50% 40%, var(--light-hot), var(--light) 60%, #f0a63a);
  border-color: #ffcf6a;
  box-shadow: 0 0 22px rgba(255, 200, 90, .55), 0 0 4px rgba(255, 230, 160, .9);
}
.win-cell.flip { animation: flip .28s ease-out; }
@keyframes flip { 0% { transform: scale(.88); } 100% { transform: scale(1); } }
.win-cell.hint::after {
  content: ''; position: absolute; inset: -7px; border-radius: 9px; border: 3px solid var(--accent);
  animation: pulse 1s ease-in-out infinite alternate;
}
@keyframes pulse { from { opacity: .35; transform: scale(.96); } to { opacity: 1; transform: scale(1.04); } }

.controls { display: flex; gap: 10px; margin-top: 22px; }
.controls button { min-width: 96px; background: rgba(14, 24, 48, .85); }
.stars-line { text-shadow: 0 1px 6px #070e1f, 0 0 2px #070e1f; color: var(--muted); font-size: 14px; min-height: 1.4em; margin: 12px 0 0; letter-spacing: .02em; }

/* ---------- dialogs ---------- */

dialog { background: #0e1830; }
.center { justify-content: center !important; }
.win { text-align: center; width: min(420px, calc(100vw - 32px)); }
.win h2 { font-size: 24px; }
.moon-big { width: 64px; height: 64px; margin: 4px auto 10px; border-radius: 50%; box-shadow: -14px 6px 0 0 #fff3cf; transform: translateX(8px); }
.win-stars { font-size: 34px; letter-spacing: .15em; color: var(--light); margin: 0; }
.level-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(76px, 1fr)); gap: 8px; max-height: 60vh; overflow: auto; padding: 2px; }
.lvl { flex-direction: column; gap: 0; padding: 8px 4px; }
.lvl strong { font-size: 18px; }
.lvl span { font-size: 12px; color: var(--light); min-height: 16px; letter-spacing: .1em; }
.lvl small { font-size: 11px; color: var(--muted); }
.lvl.current { border-color: var(--accent); background: var(--accent-soft); }
.level-grid .wide { grid-column: 1 / -1; }

@media (max-width: 600px) {
  .game { --w: min(100%, max(260px, calc((100svh - 380px) * .8))); }
  .hud { flex-direction: column; align-items: flex-start; }
  .level-title h1 { font-size: 24px; }
  .controls button { min-width: 0; }
}