/* Navigation */
.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--accent-firefly);
}

/* Hero */
.hero {
  padding-block: 2.5rem 1.5rem;
}

.eyebrow {
  margin: 0 0 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-moss);
}

h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.lead {
  max-width: 72ch;
  margin: 0 0 1.25rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.lead strong {
  color: var(--text-primary);
}

.answer-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.pill {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.6rem 0.95rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.pill-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.pill-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Game Card & Arena (isolated containment for smooth 60fps INP) */
.game-section {
  padding-block: 0.75rem 2.5rem;
}

.game-card {
  contain: layout style paint;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

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

.game-header h2 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.game-subtitle {
  margin: 0.2rem 0 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.game-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent-firefly);
  color: #161204;
}

.btn-primary:hover {
  background: #ffd166;
}

.btn-ghost {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-ghost:hover {
  border-color: rgba(167, 243, 208, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--accent-moss);
  border-color: rgba(52, 211, 153, 0.4);
  white-space: nowrap;
}

.btn-outline:hover {
  background: rgba(52, 211, 153, 0.1);
}

.btn-lg {
  padding: 0.72rem 1.5rem;
  font-size: 1rem;
}

/* HUD */
.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(70px, auto)) repeat(2, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.9rem;
  padding: 0.75rem 0.9rem;
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  align-items: center;
}

.hud-stat {
  display: flex;
  flex-direction: column;
}

.hud-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.hud-val {
  font-size: 1.15rem;
  font-variant-numeric: tabular-nums;
}

.hud-meter {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.meter-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
}

.meter-num {
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

.meter-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: var(--pct, 0%);
  border-radius: 999px;
  transition: width 0.08s linear;
}

.meter-camo {
  background: linear-gradient(90deg, #10b981, #34d399);
}

.meter-alert {
  background: linear-gradient(90deg, #f59e0b, #ef4444);
}

/* Canvas Arena */
.arena-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 280px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: #070d0a;
  touch-action: none;
  user-select: none;
}

#mottle-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

#mottle-canvas:active {
  cursor: grabbing;
}

.arena-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: rgba(6, 12, 9, 0.78);
  backdrop-filter: blur(6px);
  transition: opacity 0.2s ease;
}

.arena-overlay[hidden] {
  display: none;
}

.overlay-box {
  max-width: 440px;
  text-align: center;
}

.overlay-box h3 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  color: var(--accent-firefly);
}

.overlay-box p {
  margin: 0 0 1.1rem;
  color: var(--text-secondary);
  font-size: 0.96rem;
}

.overlay-hint {
  margin: 0.75rem 0 0 !important;
  font-size: 0.8rem !important;
  color: var(--text-secondary);
}

.game-footer-note {
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.game-footer-note p {
  margin: 0;
  max-width: 66ch;
}

/* Sections below the fold */
.section {
  padding-block: 2.25rem;
  content-visibility: auto;
  contain-intrinsic-block-size: auto 320px;
}

.section h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  letter-spacing: -0.02em;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.info-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.step-num {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-firefly);
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}

.info-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.08rem;
}

.info-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

/* Word Guide */
.word-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.word-panel p {
  color: var(--text-secondary);
}

.word-facts {
  margin: 0.75rem 0 0;
  padding-left: 1.15rem;
  color: var(--text-secondary);
}

.word-facts strong {
  color: var(--text-primary);
}

.scrabble-tiles {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tile {
  width: 46px;
  height: 52px;
  display: grid;
  place-items: center;
  position: relative;
  background: #efe3c2;
  color: #1f190f;
  font-weight: 800;
  font-size: 1.25rem;
  border-radius: 6px;
  box-shadow: 0 4px 0 #b8a374;
}

.tile sub {
  position: absolute;
  right: 5px;
  bottom: 4px;
  font-size: 0.65rem;
  font-weight: 700;
}

/* FAQ Accordion (Modern details/summary with ::before chevron & ::details-content) */
.accordion details {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 0.65rem;
}

.accordion summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 1rem 1.15rem;
  font-weight: 600;
  cursor: pointer;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion summary::before {
  content: "";
  inline-size: 0.65em;
  block-size: 0.65em;
  flex-shrink: 0;
  border-inline-end: 2px solid var(--accent-firefly);
  border-block-end: 2px solid var(--accent-firefly);
  transform: rotate(-45deg);
  transition: transform 0.2s ease;
}

.accordion details[open] > summary::before {
  transform: rotate(45deg);
}

.accordion summary:hover {
  background: rgba(255, 255, 255, 0.03);
}

.accordion details::details-content {
  interpolate-size: allow-keywords;
  overflow: clip;
  contain: layout;
}

.accordion details:not([open])::details-content {
  block-size: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .accordion details::details-content {
    transition: block-size, content-visibility, display;
    transition-duration: 0.28s;
    transition-timing-function: ease-in-out;
    transition-behavior: allow-discrete;
  }
}

.faq-body {
  padding: 0 1.15rem 1rem 2.25rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.faq-body p {
  margin: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding-block: 1.5rem 2.5rem;
  margin-top: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.86rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.footer-inner a {
  color: var(--accent-moss);
  text-decoration: none;
}

.footer-inner a:hover {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  gap: 1rem;
  margin: 0;
}

@media (max-width: 780px) {
  .hud {
    grid-template-columns: repeat(3, 1fr);
  }
  .hud-meter {
    grid-column: span 3;
  }
  .word-panel {
    grid-template-columns: 1fr;
  }
}