:root {
  --bg: #070c18;
  --bg-alt: #101d2f;
  --panel: rgba(13, 21, 36, 0.82);
  --panel-strong: rgba(22, 33, 54, 0.92);
  --line: rgba(183, 216, 255, 0.25);
  --text: #edf5ff;
  --muted: #b6c9e4;
  --accent: #66f0c0;
  --accent-2: #9eb2ff;
  --warm: #ffb073;
  --good: #70f0b5;
  --bad: #ff8e9d;
  --radius: 18px;
  --radius-lg: 26px;
  --tap: 44px;
  --shadow: 0 18px 45px rgba(1, 8, 19, 0.55);
  --maxw: 1200px;
}

html,
body {
  height: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", Tahoma, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1100px 700px at -10% -20%, rgba(93, 98, 255, 0.22), transparent 64%),
    radial-gradient(900px 600px at 120% 10%, rgba(102, 240, 192, 0.2), transparent 58%),
    linear-gradient(150deg, var(--bg), var(--bg-alt));
  overflow-x: hidden;
}

body.reduced-motion *,
body.reduced-motion *::before,
body.reduced-motion *::after {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
}

body.high-contrast {
  --bg: #02050d;
  --bg-alt: #0a1222;
  --panel: rgba(7, 12, 24, 0.98);
  --panel-strong: rgba(9, 15, 28, 0.99);
  --line: rgba(255, 255, 255, 0.65);
  --text: #ffffff;
  --muted: #d9ecff;
  --accent: #fff36f;
  --accent-2: #79e7ff;
  --warm: #ffc88b;
  --good: #8dff8d;
  --bad: #ffb0b0;
}

button,
input,
select {
  font: inherit;
}

button {
  min-height: var(--tap);
  min-width: var(--tap);
  border-radius: 14px;
  border: 1px solid transparent;
  padding: 10px 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.09);
  cursor: pointer;
  touch-action: manipulation;
}

button:hover {
  border-color: rgba(255, 255, 255, 0.25);
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

p,
h1,
h2,
h3,
span,
button {
  overflow-wrap: anywhere;
}

#fx-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
}

#app {
  position: relative;
  z-index: 2;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px;
}

.topbar {
  position: sticky;
  top: 10px;
  z-index: 80;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand-main {
  display: flex;
  gap: 12px;
  align-items: center;
}

.logo {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 10px 26px rgba(70, 125, 255, 0.35);
  animation: pulse-logo 5s ease-in-out infinite;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.18rem, 2vw, 1.5rem);
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.mascot {
  width: 66px;
  height: 66px;
  flex: 0 0 auto;
}

.stage-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.control {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  padding: 10px;
}

.control-label {
  display: block;
  font-size: 0.77rem;
  color: var(--muted);
  margin-bottom: 6px;
  letter-spacing: 0.2px;
}

.toggle-row,
.range-row,
.row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.small {
  font-size: 0.84rem;
  color: var(--muted);
}

.pill {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.09);
}

.primary {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #071221;
  border-color: rgba(255, 255, 255, 0.25);
  font-weight: 700;
}

.ghost {
  background: rgba(255, 255, 255, 0.06);
}

.grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px;
}

.card {
  position: relative;
  grid-column: span 12;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  pointer-events: none;
}

.card-pattern {
  position: absolute;
  inset: auto -10% -40% auto;
  width: 180px;
  height: 180px;
  opacity: 0.16;
  pointer-events: none;
}

.inner {
  padding: clamp(14px, 2vw, 22px);
}

.card h2 {
  margin: 0 0 8px;
  font-size: clamp(1rem, 1.6vw, 1.34rem);
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.stage {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.hr {
  height: 1px;
  background: rgba(255, 255, 255, 0.14);
  margin: 12px 0;
}

.kbd {
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.16);
  padding: 2px 8px;
  font-weight: 700;
}

.challenge-canvas {
  width: 100%;
  max-height: 54vh;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: radial-gradient(circle at 20% 10%, rgba(130, 145, 255, 0.25), rgba(7, 14, 28, 0.75));
  touch-action: manipulation;
}

.back-btn {
  position: fixed;
  left: 12px;
  bottom: 12px;
  z-index: 90;
  box-shadow: var(--shadow);
}

html[dir="rtl"] .back-btn {
  left: auto;
  right: 12px;
}

.overlay-note {
  position: absolute;
  inset: 12px;
  pointer-events: none;
  display: grid;
  place-items: center;
}

.overlay-card {
  max-width: 540px;
  pointer-events: auto;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(5, 11, 22, 0.93);
  padding: 14px;
  box-shadow: var(--shadow);
}

.overlay-card h3 {
  margin: 0 0 8px;
}

.feedback {
  margin-top: 10px;
  min-height: 1.3rem;
  font-size: 0.92rem;
}

.feedback.good {
  color: var(--good);
}

.feedback.bad {
  color: var(--bad);
}

.difficulty-group button {
  min-width: 82px;
}

.logic-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.logic-bays {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.bay {
  text-align: start;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
  padding: 12px;
}

.bay.locked {
  animation: bay-lock 420ms ease;
  border-color: rgba(112, 240, 181, 0.9);
  box-shadow: inset 0 0 0 1px rgba(112, 240, 181, 0.55);
}

.token-tray {
  position: sticky;
  bottom: 0;
  z-index: 10;
  border-radius: 14px;
  background: rgba(8, 15, 28, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 10px;
  backdrop-filter: blur(8px);
}

.token-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.token {
  text-align: start;
  border-radius: 13px;
  padding: 10px;
}

.token.selected {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.story-box {
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
  padding: 12px;
  line-height: 1.6;
}

.readout {
  position: fixed;
  right: 12px;
  top: 86px;
  z-index: 95;
  width: min(290px, calc(100vw - 24px));
  border-radius: 14px;
  background: rgba(6, 12, 24, 0.93);
  border: 1px solid var(--line);
  padding: 10px;
  box-shadow: var(--shadow);
}

html[dir="rtl"] .readout {
  right: auto;
  left: 12px;
}

.readout pre {
  margin: 0;
  white-space: pre-wrap;
  font-size: 0.75rem;
  color: #d8ecff;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  z-index: 200;
  background: rgba(4, 10, 20, 0.95);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 12px;
  display: none;
}

html[dir="rtl"] .toast {
  left: auto;
  right: 12px;
  transform: none;
}

@media (min-width: 860px) {
  .wrap {
    padding: 18px;
  }

  .topbar {
    grid-template-columns: 1.35fr 1fr;
    align-items: start;
  }

  .stage-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .span4 {
    grid-column: span 4;
  }

  .span6 {
    grid-column: span 6;
  }

  .token-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .logic-layout {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .back-btn {
    bottom: auto;
    top: 88px;
    left: 18px;
  }

  html[dir="rtl"] .back-btn {
    left: auto;
    right: 18px;
  }
}

@keyframes pulse-logo {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.06);
  }
}

@keyframes bay-lock {
  0% {
    transform: scale(0.98);
  }
  40% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}