:root {
  --bg: #060814;
  --bg-card: #101522;
  --bg-card-hover: #181f30;
  --accent: #ff4b91;
  --accent-soft: rgba(255, 75, 145, 0.15);
  --text-main: #f5f5f5;
  --text-muted: #c0c6dd;
  --border-soft: #252c40;
  --tag-bg: #1b2233;
  --tag-text: #f5f5f5;
  --focus-ring: 0 0 0 3px rgba(255, 75, 145, 0.6);
  --shadow-soft: 0 22px 40px rgba(0, 0, 0, 0.6);
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 0.18s ease-out;
  --transition-med: 0.28s ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #151b35 0, #060814 55%, #02030a 100%);
  color: var(--text-main);
  display: flex;
  align-items: stretch;
  justify-content: center;
}

.page {
  width: 100%;
  max-width: 1200px;
  padding: 24px 16px 40px;
  margin: 0 auto;
}

@media (min-width: 960px) {
  .page {
    padding: 32px 24px 48px;
  }
}

header {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

@media (min-width: 840px) {
  header {
    margin-bottom: 32px;
  }
}

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

.brand-logo {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background: radial-gradient(circle at 30% 20%, #ffe6f3 0, #ff4b91 30%, #7a31ff 70%, #151b35 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
  flex-shrink: 0;
}

.brand-logo span {
  font-weight: 800;
  font-size: 1.4rem;
  text-shadow: 0 0 14px rgba(0, 0, 0, 0.9);
}

.brand-text h1 {
  font-size: clamp(1.6rem, 2.3vw + 1.2rem, 2.2rem);
  margin: 0;
  letter-spacing: 0.03em;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35ch;
  align-items: baseline;
}

.brand-text h1 span.highlight {
  color: var(--accent);
}

.brand-text p {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pill {
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: rgba(5, 8, 17, 0.8);
  padding: 6px 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pill strong {
  color: var(--text-main);
  font-weight: 600;
}

.filter-btn {
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  padding: 6px 13px;
  font-size: 0.8rem;
  background: rgba(9, 12, 24, 0.9);
  color: var(--text-muted);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform 0.1s ease;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--text-main);
  transform: translateY(-1px);
}

.filter-btn.active {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.filter-btn:focus-visible,
.random-btn:focus-visible,
.play-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.random-btn {
  border-radius: 999px;
  border: none;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  background: linear-gradient(135deg, #ff4b91, #ff7b5c);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.65);
  transition:
    transform var(--transition-med),
    box-shadow var(--transition-med),
    filter 0.2s ease;
}

.random-btn span.icon {
  font-size: 1.1rem;
}

.random-btn:hover {
  transform: translateY(-1px) scale(1.02);
  filter: brightness(1.05);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.8);
}

main {
  background:
    radial-gradient(circle at top left, rgba(255, 75, 145, 0.15) 0, transparent 50%),
    radial-gradient(circle at bottom right, rgba(63, 139, 255, 0.15) 0, transparent 55%),
    rgba(3, 5, 14, 0.9);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(43, 52, 88, 0.85);
  padding: 20px 14px 18px;
  box-shadow: var(--shadow-soft);
}

@media (min-width: 720px) {
  main {
    padding: 24px 20px 22px;
  }
}

.grid-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.grid-header h2 {
  margin: 0;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.grid-header small {
  font-size: 0.8rem;
  color: var(--text-muted);
}


.game-menu {
  margin: 10px 0 18px;
}

.game-menu .controls {
  margin: 0;
}

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

@media (min-width: 640px) {
  .game-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .game-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.game-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  background: linear-gradient(145deg, rgba(9, 12, 24, 0.97), rgba(16, 21, 38, 0.98));
  padding: 14px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 140px;
  transition:
    transform var(--transition-med),
    box-shadow var(--transition-med),
    border-color var(--transition-med),
    background 0.25s ease;
}

.game-card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at top left, rgba(255, 75, 145, 0.18), transparent 60%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-med);
}

.game-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.85);
  border-color: rgba(255, 75, 145, 0.7);
  background: linear-gradient(145deg, rgba(13, 18, 34, 1), rgba(23, 29, 51, 1));
}

.game-card:hover::before {
  opacity: 1;
}

.game-topic {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.game-title {
  margin: 0;
  font-size: 1rem;
}

.game-title span {
  color: var(--accent);
  font-weight: 700;
}

.game-desc {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.tag {
  background: var(--tag-bg);
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 0.7rem;
  color: var(--tag-text);
  opacity: 0.9;
}

.tag.exam {
  background: rgba(255, 75, 145, 0.16);
  color: var(--accent);
  border: 1px solid rgba(255, 75, 145, 0.5);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid rgba(33, 41, 67, 0.9);
}

.skill-text {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.play-btn {
  border-radius: 999px;
  border: none;
  padding: 6px 11px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    transform 0.12s ease;
}

.play-btn span.icon {
  font-size: 0.95rem;
}

.game-card:hover .play-btn {
  background: rgba(255, 75, 145, 0.28);
  color: #ffffff;
}

footer {
  margin-top: 12px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hint {
  opacity: 0.85;
}

.hidden {
  display: none !important;
}



/* Topic cards on index page */
.topic-section {
  margin-top: 32px;
  margin-bottom: 32px;
}

.topic-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.topic-section-header h2 {
  font-size: 1.3rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topic-section-header .hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.topic-layout {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topic-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-start;
}

.random-topic-btn {
  border-radius: 999px;
  border: none;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  background: linear-gradient(135deg, #ff4b91, #ff7b5c);
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.7);
  transition:
    transform 0.12s ease-out,
    box-shadow 0.12s ease-out,
    filter 0.12s ease-out;
}

.random-topic-btn .icon {
  font-size: 1.05rem;
}

.random-topic-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.8);
}

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

@media (min-width: 900px) {
  .topic-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.topic-card {
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: radial-gradient(circle at top left, rgba(255, 75, 145, 0.15), rgba(9, 12, 24, 0.98));
  padding: 7px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.85rem;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.topic-card:hover,
.topic-card:focus-visible {
  background: radial-gradient(circle at top left, rgba(255, 75, 145, 0.25), rgba(16, 21, 38, 0.98));
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.85);
  outline: none;
}

.topic-card-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.topic-card-label span:first-child {
  font-weight: 600;
  font-size: 0.8rem;
  opacity: 0.85;
}

.topic-card-label span:last-child {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.topic-number {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(10, 18, 38, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.12);
}