/* ============================================================
   MAGNET — минимальный неоновый физик-аркадный стиль
   Палитра: фон глубокий тёмно-синий; «+» красный; «−» голубой;
   металл серебро; цель зелёное; опасность красная.
   ============================================================ */

:root {
  --bg0: #04050d;
  --bg1: #0b1026;
  --ink: #dfe7ff;
  --ink-dim: #7c89ad;
  --plus: #ff5470;
  --minus: #37c8ff;
  --goal: #5dffa0;
  --panel: rgba(13, 19, 42, 0.82);
  --line: rgba(95, 125, 195, 0.28);
  --accent: #8f7dff;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: radial-gradient(120% 90% at 50% 10%, var(--bg1) 0%, var(--bg0) 70%);
  color: var(--ink);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  -webkit-user-select: none; user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  overscroll-behavior: none;
}

#app { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center; }

#stage {
  position: relative;
  width: min(100vw, calc(100vh * 1.6));
  height: min(100vh, calc(100vw / 1.6));
  width: min(100vw, calc((100dvh - 0px) * 1.6));
  height: min(100dvh, calc(100vw / 1.6));
  max-width: 1600px;
}

canvas#game {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  border-radius: 6px;
}

.hidden { display: none !important; }

/* ---------------- HUD ---------------- */

#hud {
  position: absolute; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px;
  pointer-events: none;
  font-size: clamp(11px, 1.8vmin, 15px);
}
.hud-left, .hud-right { display: flex; gap: 8px; align-items: center; }

.hud-chip {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  text-transform: uppercase;
  font-weight: 600;
}
#hudTime { min-width: 72px; text-align: center; color: var(--accent); }
#hudAttempts { color: var(--ink-dim); }

.hud-btn {
  pointer-events: auto;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-size: 16px;
  cursor: pointer;
  transition: transform .12s ease, border-color .12s ease, box-shadow .12s ease;
  line-height: 1;
}
.hud-btn:hover { transform: scale(1.08); border-color: var(--accent); box-shadow: 0 0 14px rgba(143,125,255,.35); }
.hud-btn:active { transform: scale(.94); }

#polarityChip {
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 18px;
  border: 1px solid transparent;
  transition: all .15s ease;
}
#polarityChip.plus { background: rgba(255,84,112,.16); color: var(--plus); border-color: var(--plus); box-shadow: 0 0 16px rgba(255,84,112,.45); }
#polarityChip.minus { background: rgba(55,200,255,.16); color: var(--minus); border-color: var(--minus); box-shadow: 0 0 16px rgba(55,200,255,.45); }
#polarityChip.flip { transform: rotate(180deg) scale(1.25); }

/* подсказка уровня */
#hintBanner {
  position: absolute; left: 50%; top: 58px; transform: translateX(-50%);
  background: rgba(8, 12, 28, .75);
  border: 1px solid var(--line);
  padding: 8px 18px; border-radius: 999px;
  font-size: clamp(11px, 2vmin, 15px);
  letter-spacing: .18em; font-weight: 700;
  text-transform: uppercase;
  color: var(--goal);
  text-shadow: 0 0 18px rgba(93,255,160,.6);
  white-space: nowrap;
  opacity: 1; transition: opacity .6s ease, transform .6s ease;
  pointer-events: none;
}
#hintBanner.fade { opacity: 0; transform: translateX(-50%) translateY(-8px); }

/* ---------------- сенсорный слой ---------------- */

#touchLayer { position: absolute; inset: 0; pointer-events: none; }

#stickZone { position: absolute; left: 0; bottom: 0; width: 52%; height: 68%; pointer-events: auto; }
#stickBase {
  position: absolute; width: 118px; height: 118px; border-radius: 50%;
  border: 2px solid rgba(120,150,220,.35);
  background: radial-gradient(circle, rgba(20,30,60,.55), rgba(10,14,30,.25));
  transform: translate(-50%,-50%);
  display: none;
}
#stickKnob {
  position: absolute; width: 54px; height: 54px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #cfe2ff, #5f7fbf);
  box-shadow: 0 0 18px rgba(95,127,191,.6);
  transform: translate(-50%,-50%);
  display: none;
}
#touchLayer.active #stickBase, #touchLayer.active #stickKnob { display: block; }

#btnPolarity {
  pointer-events: auto;
  position: absolute; right: 18px; bottom: 24px;
  width: 76px; height: 76px; border-radius: 50%;
  border: 2px solid var(--plus);
  background: rgba(255,84,112,.14);
  color: var(--plus);
  font-size: 30px; font-weight: 800;
  box-shadow: 0 0 22px rgba(255,84,112,.35);
  transition: all .1s ease;
}
#btnPolarity.minus { border-color: var(--minus); color: var(--minus); background: rgba(55,200,255,.14); box-shadow: 0 0 22px rgba(55,200,255,.35); }
#btnPolarity:active { transform: scale(.9); }

/* ---------------- экраны / оверлеи ---------------- */

.screen {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column;
  background: radial-gradient(90% 70% at 50% 42%, rgba(10,14,32,.55) 0%, rgba(4,5,13,.88) 100%);
  animation: screenIn .35s ease;
  z-index: 10;
}
.screen.overlay { background: rgba(4,5,13,.78); backdrop-filter: blur(6px); }
@keyframes screenIn { from { opacity: 0; } to { opacity: 1; } }

.menu-box { text-align: center; padding: 20px; }

.logo {
  font-size: clamp(56px, 13vmin, 110px);
  font-weight: 900;
  letter-spacing: .16em;
  background: linear-gradient(92deg, var(--plus) 0%, #c6b8ff 50%, var(--minus) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  filter: drop-shadow(0 0 26px rgba(120,150,255,.35));
  margin-bottom: 6px;
}
.tagline {
  color: var(--ink-dim);
  letter-spacing: .34em;
  font-size: clamp(9px, 1.9vmin, 13px);
  text-transform: uppercase;
  margin-bottom: clamp(24px, 6vmin, 48px);
}

.menu-btns { display: flex; flex-direction: column; gap: 12px; align-items: center; }

.btn {
  pointer-events: auto;
  min-width: 230px;
  padding: 13px 30px;
  font-family: inherit;
  font-size: clamp(13px, 2.2vmin, 16px);
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink);
  background: rgba(16,23,48,.9);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  position: relative;
  transition: transform .14s ease, border-color .14s ease, box-shadow .18s ease, background .14s ease;
}
.btn:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: 0 6px 26px rgba(120,110,255,.28), 0 0 0 1px rgba(143,125,255,.4) inset; }
.btn:active { transform: translateY(0) scale(.98); }
.btn-primary {
  border-color: var(--minus);
  color: #eaf7ff;
  background: linear-gradient(120deg, rgba(55,200,255,.18), rgba(143,125,255,.18));
  box-shadow: 0 0 24px rgba(55,200,255,.22);
}
.btn-primary:hover { box-shadow: 0 6px 30px rgba(55,200,255,.4); }
.btn-ghost { background: transparent; color: var(--ink-dim); }
.btn-small { min-width: 0; padding: 7px 16px; font-size: 12px; }

.controls-hint {
  margin-top: clamp(26px, 7vmin, 56px);
  color: var(--ink-dim); font-size: clamp(10px, 1.7vmin, 13px);
  letter-spacing: .1em;
}

.lang-switch { position: absolute; top: 14px; right: 16px; display: flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.lang-btn {
  background: transparent; border: none; color: var(--ink-dim);
  font: 700 12px/1 inherit; letter-spacing: .12em;
  padding: 8px 13px; cursor: pointer; transition: all .15s ease;
}
.lang-btn.active { background: var(--accent); color: #0a0d1f; }

/* панели */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 34px 24px;
  min-width: min(480px, 92vw);
  max-width: 92vw;
  box-shadow: 0 24px 80px rgba(0,0,0,.5);
  text-align: center;
}
.panel h2 { letter-spacing: .24em; font-size: clamp(16px, 3vmin, 22px); margin-bottom: 18px; text-transform: uppercase; }
.back-btn { margin-top: 20px; }

/* сетка уровней */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(86px, 1fr));
  gap: 10px;
  margin-bottom: 4px;
}
.lvl-btn {
  position: relative;
  padding: 12px 6px 9px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(15,21,44,.85);
  color: var(--ink);
  font-family: inherit;
  cursor: pointer;
  transition: transform .12s ease, border-color .12s, box-shadow .12s;
}
.lvl-btn .num { font-size: 20px; font-weight: 800; }
.lvl-btn .bt { font-size: 10px; color: var(--goal); letter-spacing: .05em; font-variant-numeric: tabular-nums; margin-top: 2px; min-height: 12px; }
.lvl-btn:hover:not(.locked) { transform: translateY(-2px); border-color: var(--accent); box-shadow: 0 4px 18px rgba(120,110,255,.25); }
.lvl-btn.locked { opacity: .32; cursor: default; }
.lvl-btn.locked .num { font-size: 15px; }
.lvl-btn.cleared { border-color: rgba(93,255,160,.45); }

/* настройки */
.set-row {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 9px 4px;
  font-size: 14px; letter-spacing: .06em;
  border-bottom: 1px dashed rgba(95,125,195,.15);
}
.set-row.danger span { color: #ff8095; }
.seg { display: flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.seg-btn {
  background: transparent; border: none; color: var(--ink-dim);
  font: 700 11px/1 inherit; letter-spacing: .1em; padding: 7px 13px; cursor: pointer;
  transition: all .15s ease;
}
.seg-btn.active { background: var(--accent); color: #0a0d1f; }
input[type="range"] { width: 150px; accent-color: var(--accent); cursor: pointer; }

/* результаты */
.result { min-width: min(420px, 92vw); }
.win-title { color: var(--goal) !important; text-shadow: 0 0 24px rgba(93,255,160,.5); }
.fail-title { color: var(--plus) !important; text-shadow: 0 0 24px rgba(255,84,112,.5); }
.fail-sub { color: var(--ink-dim); font-size: 13px; margin: -8px 0 14px; letter-spacing: .08em; }
.result-rows { margin: 6px auto 20px; display: grid; gap: 7px; max-width: 300px; }
.rrow { display: flex; justify-content: space-between; font-size: 14px; color: var(--ink-dim); letter-spacing: .08em; }
.rrow b { color: var(--ink); font-variant-numeric: tabular-nums; }
.result .menu-btns { flex-direction: row; flex-wrap: wrap; justify-content: center; }
.result .btn { min-width: 150px; }

.fatal {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: #ff8095; font-size: 14px; letter-spacing: .08em; text-align: center; padding: 30px;
  background: var(--bg0); z-index: 99;
}

@media (max-width: 640px) {
  .hud-chip { padding: 4px 9px; font-size: 10px; }
  .btn { min-width: 200px; }
  #btnPolarity { width: 64px; height: 64px; font-size: 24px; right: 14px; bottom: 18px; }
  .result .btn { min-width: 120px; padding: 11px 18px; font-size: 12px; }
  .panel { padding: 20px 16px; }
  #hintBanner { white-space: normal; text-align: center; max-width: 90vw; letter-spacing: .1em; }
}

@media (max-height: 480px) {
  #hud { padding: 5px 8px; }
  #hintBanner { top: 40px; }
  .logo { font-size: 42px; }
  .tagline { margin-bottom: 14px; }
  .btn { padding: 9px 22px; }
}