:root {
  --bg: #070b1d;
  --card: rgba(20, 28, 58, 0.85);
  --card-bright: rgba(28, 40, 82, 0.9);
  --stroke: rgba(148, 163, 184, 0.25);
  --text: #e6f0ff;
  --muted: rgba(230, 240, 255, 0.7);
  --accent: #5ee7ff;
  --accent-2: #a78bfa;
  --accent-3: #ffd166;
  --danger: #ff6b6b;
  --success: #4ade80;
  --shadow: 0 26px 50px rgba(6, 10, 30, 0.5);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Space Grotesk", sans-serif;
}

body {
  min-height: 100vh;
  color: var(--text);
  background: radial-gradient(circle at top, rgba(94, 231, 255, 0.18), transparent 55%),
    radial-gradient(circle at 80% 0, rgba(167, 139, 250, 0.22), transparent 55%),
    #070b1d;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(#ffffff 1px, transparent 1px),
    radial-gradient(#c4b5fd 1px, transparent 1px),
    radial-gradient(#7dd3fc 1px, transparent 1px),
    radial-gradient(#fef9c3 1px, transparent 1px),
    radial-gradient(#ffffff 1px, transparent 1px);
  background-size: 70px 70px, 90px 90px, 110px 110px, 140px 140px, 180px 180px;
  background-position: 0 0, 30px 40px, 60px 20px, 90px 80px, 120px 120px;
  opacity: 0.45;
  z-index: -2;
}

.sky {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.page {
  padding: 2.5rem clamp(1.5rem, 4vw, 4rem) 4rem;
}

.hero {
  margin-bottom: 2rem;
  text-align: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

h1 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  margin-bottom: 0.6rem;
}

.title-icons {
  font-size: 1.4rem;
  margin-left: 0.35rem;
}

.subtitle {
  max-width: 640px;
  color: var(--muted);
  line-height: 1.6;
  margin: 0 auto;
}

.layout {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(320px, 2fr) minmax(220px, 1fr);
  gap: 1.5rem;
  align-items: stretch;
}

.card {
  background: var(--card);
  border-radius: 24px;
  border: 1px solid var(--stroke);
  padding: 1.6rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.controls,
.gameplay {
  height: 100%;
}

.card.gameplay {
  background: var(--card-bright);
}

h2 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 1rem;
}

select,
input {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(255, 255, 255, 0.95);
  color: #0f172a;
  font-size: 0.98rem;
}

select {
  cursor: pointer;
}

.timer-pill {
  display: inline-flex;
  gap: 0.25rem;
  align-items: baseline;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: rgba(94, 231, 255, 0.2);
  color: #e0f2fe;
  border: 1px solid rgba(94, 231, 255, 0.5);
}

.button-row {
  display: flex;
  gap: 0.8rem;
  margin: 1.2rem 0 0.4rem;
}

.primary-full {
  width: 100%;
}

.helper-tip {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}


.helper-tip {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 0.8rem 1.2rem;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #0f172a;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 14px 28px rgba(94, 231, 255, 0.25);
}

button:hover {
  transform: translateY(-2px) scale(1.01);
}

button.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--stroke);
  box-shadow: none;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.stat {
  background: rgba(12, 18, 40, 0.75);
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 0.8rem;
  text-align: center;
}

.stat .label {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.question-block {
  margin-bottom: 1.5rem;
  text-align: center;
}

.question-label {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.question {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  background: linear-gradient(120deg, var(--accent-3), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.answer-block label {
  font-size: 0.9rem;
  color: var(--muted);
}

.answer-row {
  display: flex;
  gap: 0.8rem;
  margin: 0.6rem 0 0.8rem;
}

.answer-row input {
  flex: 1;
}

.feedback {
  min-height: 1.2rem;
  font-weight: 600;
  text-align: center;
}

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

.feedback.error {
  color: var(--danger);
}

.progress {
  height: 10px;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.3s ease;
}

.history-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.7rem 0.8rem;
  border-radius: 14px;
  background: rgba(12, 18, 40, 0.75);
  border: 1px solid var(--stroke);
  font-size: 0.9rem;
}

.history-item span {
  color: var(--muted);
}

.empty {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
  }
}