:root {
  --bg-top: #120a2a;
  --bg-bottom: #03030b;
  --panel: rgba(15, 10, 35, 0.84);
  --panel-border: rgba(192, 132, 252, 0.42);
  --primary: #c084fc;
  --primary-strong: #8b5cf6;
  --secondary: #e9b7ff;
  --danger: #ef4444;
  --text: #e2e8f0;
  --muted: #cbd5e1;
  --shadow: rgba(2, 6, 23, 0.6);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(ellipse at 18% 22%, rgba(106, 48, 170, 0.32), transparent 38%),
    radial-gradient(ellipse at 82% 36%, rgba(47, 65, 152, 0.25), transparent 34%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  color: var(--text);
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(96vw, 1100px);
  display: grid;
  gap: 16px;
}

.hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background: rgba(12, 8, 30, 0.82);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  box-shadow: 0 14px 32px rgba(2, 6, 23, 0.4);
}

.hud-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hud-label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

#distanceValue {
  font-size: clamp(1.2rem, 3vw, 2.1rem);
}

.game-panel {
  position: relative;
  width: 100%;
  min-height: 420px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  box-shadow: 0 18px 50px rgba(2, 6, 23, 0.5);
  background: #090717;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  background: #090717;
}

.screen,
.modal {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(3, 3, 12, 0.56);
  backdrop-filter: blur(3px);
}

.hidden {
  display: none;
}

.panel-card {
  width: min(88%, 560px);
  padding: 24px 22px;
  border-radius: 22px;
  background: rgba(12, 8, 30, 0.92);
  border: 1px solid var(--panel-border);
  box-shadow: 0 18px 40px var(--shadow);
  text-align: center;
}

.welcome-character {
  display: block;
  width: 104px;
  height: 104px;
  margin: 0 auto 16px;
  border: 3px solid #c084fc;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 24px rgba(192, 132, 252, 0.4);
}

.panel-card h1,
.panel-card h2 {
  margin: 0 0 12px;
}

.panel-card p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.5;
}

.primary-button,
.answer-button {
  appearance: none;
  border: none;
  border-radius: 12px;
  padding: 0.9rem 1.2rem;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
  font-weight: 700;
}

.primary-button {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  color: #1b1030;
  min-width: 180px;
}

.primary-button:hover,
.answer-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.question-card {
  width: min(92%, 620px);
  background-size: cover;
  background-position: center;
  position: relative;
}

.question-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.38);
  border-radius: inherit;
}

.controls-hint {
  font-size: 0.88rem;
  color: #d8b4fe !important;
}

.question-card > * {
  position: relative;
  z-index: 1;
}

.question-header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
  font-size: 0.8rem;
  color: var(--muted);
}

#questionText {
  font-size: clamp(1.2rem, 2vw, 1.9rem);
  text-align: left;
}

.answers {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.answer-button {
  background: rgba(30, 41, 59, 0.95);
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.38);
  text-align: left;
  min-height: 54px;
}

.answer-button.correct {
  background: rgba(22, 163, 74, 0.18);
  border-color: rgba(34, 197, 94, 0.7);
}

.answer-button.incorrect {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(248, 113, 113, 0.7);
}

.feedback {
  min-height: 24px;
  margin-top: 16px;
  font-size: 0.96rem;
  color: var(--secondary);
}

.reward-card {
  width: min(86%, 500px);
}

#rewardImage {
  display: block;
  width: min(100%, 360px);
  max-height: 240px;
  object-fit: contain;
  margin: 10px auto 16px;
  border-radius: 18px;
  background: #05030b;
  box-shadow: 0 16px 30px rgba(2, 6, 23, 0.55), 0 0 24px rgba(168, 85, 247, 0.2);
}

.reward-message {
  margin: 0 0 12px;
  color: #fef3c7;
  font-weight: 700;
  line-height: 1.5;
}

.continue-text {
  color: var(--secondary);
  font-weight: 700;
  margin-bottom: 0;
}

.result-card {
  width: min(82%, 420px);
}

.game-over-message {
  color: #f0abfc !important;
  font-size: 1.3rem;
  font-weight: 700;
  text-shadow: 0 0 14px rgba(192, 132, 252, 0.65);
}

.portal-overlay {
  overflow-y: auto;
  background:
    radial-gradient(ellipse at center, rgba(101, 45, 170, 0.26), transparent 58%),
    rgba(3, 2, 12, 0.68);
}

.portal-card {
  width: min(90%, 560px);
  min-height: 360px;
  padding: 22px 24px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.portal-visual {
  position: relative;
  width: 136px;
  height: 136px;
  display: grid;
  place-items: center;
  margin: 0 auto 8px;
  filter: drop-shadow(0 0 20px rgba(192, 132, 252, 0.72));
  animation: portal-float 2.5s ease-in-out infinite;
}

.portal-ring,
.portal-core {
  position: absolute;
  border-radius: 50%;
}

.portal-ring {
  inset: 6px;
  border: 5px solid #d8b4fe;
  box-shadow:
    0 0 12px #c084fc,
    inset 0 0 14px #a855f7,
    0 0 32px rgba(168, 85, 247, 0.9);
  animation: portal-spin 5s linear infinite;
}

.portal-ring::before,
.portal-ring::after {
  content: "";
  position: absolute;
  inset: 8px -7px;
  border: 2px solid rgba(240, 171, 252, 0.8);
  border-radius: 50%;
  transform: rotate(55deg);
}

.portal-ring::after {
  transform: rotate(-55deg);
  border-color: rgba(129, 140, 248, 0.85);
}

.portal-core {
  inset: 25px;
  background: radial-gradient(circle, #f5d0fe 0%, #c084fc 26%, #7c3aed 58%, #160b38 100%);
  box-shadow: 0 0 30px rgba(216, 180, 254, 0.9);
  animation: portal-pulse 1.8s ease-in-out infinite alternate;
}

.portal-caption,
.portal-message,
.final-coupon {
  opacity: 0;
  transform: translateY(14px) scale(0.96);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.portal-caption {
  margin: 0 0 8px;
  color: #d8b4fe;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.portal-message {
  margin: 4px 0 22px;
  color: #f0abfc;
  font-size: clamp(2rem, 7vw, 3.4rem);
  letter-spacing: 0.08em;
  text-shadow: 0 0 12px #c084fc, 0 0 34px rgba(168, 85, 247, 0.8);
}

.message-visible .portal-caption,
.message-visible .portal-message,
.coupon-visible .final-coupon {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.coupon-visible .portal-visual {
  transform: scale(0.62);
  margin-top: -20px;
  margin-bottom: -10px;
  transition: transform 0.9s ease, margin 0.9s ease;
}

.final-coupon {
  width: min(100%, 390px);
  margin: 2px auto 20px;
  padding: 23px 18px;
  border: 1px solid rgba(216, 180, 254, 0.78);
  border-radius: 18px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(147, 51, 234, 0.25), transparent 72%),
    linear-gradient(145deg, rgba(17, 8, 39, 0.96), rgba(5, 4, 16, 0.98));
  box-shadow: 0 0 30px rgba(147, 51, 234, 0.28), inset 0 0 24px rgba(139, 92, 246, 0.12);
  transition-delay: 0.25s;
}

.coupon-label,
.coupon-stars {
  color: #d8b4fe;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.final-coupon h3 {
  margin: 12px 0 6px;
  color: #f0abfc;
  font-size: clamp(1.5rem, 6vw, 2.2rem);
  letter-spacing: 0.12em;
  text-shadow: 0 0 16px rgba(192, 132, 252, 0.72);
}

.final-coupon p {
  margin: 0 0 14px;
  color: #e9d5ff;
  letter-spacing: 0.18em;
  font-weight: 700;
}

.coupon-stars {
  color: #f0abfc;
}

.portal-card .primary-button {
  transition: opacity 0.5s ease, transform 0.5s ease;
}

@keyframes portal-spin {
  to { transform: rotate(360deg); }
}

@keyframes portal-pulse {
  from { transform: scale(0.88); opacity: 0.78; }
  to { transform: scale(1.08); opacity: 1; }
}

@keyframes portal-float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -10px; }
}

@media (max-width: 760px) {
  .hud {
    padding-inline: 14px;
  }

  .panel-card {
    padding: 20px 16px;
  }

  .primary-button,
  .answer-button {
    width: 100%;
  }

  .portal-card {
    min-height: 320px;
    padding: 18px 14px 24px;
  }

  .question-header {
    flex-direction: column;
    align-items: flex-start;
  }
}