:root {
  color-scheme: dark;
  --bg: #111018;
  --surface: #1b1924;
  --surface-2: #252231;
  --line: #393448;
  --text: #f6f1ff;
  --muted: #b7afc6;
  --accent: #e2b861;
  --accent-2: #8ed8bc;
  --danger: #ff9b9b;
  --radius: 20px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at top, #292234 0, var(--bg) 42rem); color: var(--text); }
button, input { font: inherit; }
button { cursor: pointer; }
.site-header { max-width: 1120px; margin: auto; padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { color: inherit; text-decoration: none; display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center; background: var(--accent); color: #211b10; font-size: 22px; }
.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); margin-top: 2px; }
main { width: min(100% - 32px, 980px); margin: 18px auto 72px; }
.hero { text-align: center; padding: 42px 16px 28px; }
.hero h1 { font-family: Georgia, serif; font-size: clamp(2.8rem, 8vw, 5.5rem); line-height: .95; margin: 8px 0 18px; letter-spacing: -.045em; }
.hero > p:last-of-type { color: var(--muted); font-size: 1.08rem; }
.eyebrow { color: var(--accent); text-transform: uppercase; font-size: .76rem; letter-spacing: .15em; font-weight: 800; margin: 0 0 7px; }
.mode-switch { display: inline-grid; grid-template-columns: 1fr 1fr; gap: 5px; background: #0e0d14; border: 1px solid var(--line); padding: 5px; border-radius: 999px; margin-top: 16px; }
.mode-switch button { border: 0; background: transparent; color: var(--muted); padding: 10px 28px; border-radius: 999px; font-weight: 750; }
.mode-switch button.selected { color: #211b10; background: var(--accent); }
.puzzle-bookends { display: grid; grid-template-columns: minmax(0,1fr) auto minmax(0,1fr); gap: 22px; align-items: center; margin: 22px 0; }
.featured-card { background: linear-gradient(145deg, var(--surface-2), var(--surface)); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; text-align: center; box-shadow: 0 20px 50px #0005; }
.featured-card img { display: block; width: min(100%, 245px); margin: 12px auto; border-radius: 4.75% / 3.5%; background: #0b0a0f; aspect-ratio: 488 / 680; object-fit: cover; }
.featured-card strong { font-size: 1.08rem; }
.bookend-arrow { text-align: center; color: var(--muted); }
.bookend-arrow span, .bookend-arrow b { display: block; }
.bookend-arrow b { color: var(--accent); font-size: 2.2rem; }
.easy-panel, .play-panel, .results { background: #17151fdd; border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(18px, 4vw, 30px); margin: 20px 0; backdrop-filter: blur(18px); }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
h2 { margin: 0; font-size: clamp(1.35rem, 4vw, 2rem); }
.hint-controls { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 9px; }
.hint-controls span { color: var(--muted); font-size: .78rem; white-space: nowrap; }
.easy-slots { display: grid; gap: 10px; }
.easy-slot { display: flex; gap: 12px; align-items: center; border: 1px solid var(--line); border-radius: 14px; padding: 13px 15px; color: var(--muted); }
.easy-slot span { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--surface-2); font-size: .8rem; }
.easy-slot.active { border-color: var(--accent); color: var(--text); box-shadow: inset 3px 0 var(--accent); }
.easy-slot.solved { border-color: #3f6e61; color: var(--accent-2); }
.chain { display: grid; gap: 7px; }
.chain-card { display: grid; grid-template-columns: 58px 1fr; align-items: center; gap: 14px; background: var(--surface-2); border: 1px solid var(--line); padding: 8px; border-radius: 14px; }
.chain-card img { width: 58px; aspect-ratio: 488 / 680; object-fit: cover; border-radius: 5px; background: #0a0910; }
.chain-card div span, .chain-card div strong { display: block; }
.chain-card div span { color: var(--muted); font-size: .78rem; margin-bottom: 3px; }
.connector { display: flex; flex-direction: column; align-items: center; color: var(--accent); font-size: .75rem; }
.connector b { font-size: 1.2rem; line-height: 1; }
.search-panel { margin-top: 24px; }
.search-panel label { display: block; margin-bottom: 9px; color: var(--muted); }
.search-panel label strong { color: var(--accent); }
.search-form { margin: 0; }
input[type="search"] { width: 100%; border: 1px solid var(--line); border-radius: 13px; background: #0e0d14; color: var(--text); padding: 15px 16px; outline: none; }
input[type="search"]:focus { border-color: var(--accent); box-shadow: 0 0 0 3px #e2b86122; }
.message { min-height: 24px; margin: 15px 0 0; }
.message[data-kind="error"] { color: var(--danger); }
.message[data-kind="success"] { color: var(--accent-2); }
.message[data-kind="info"] { color: var(--muted); }
.actions { display: flex; gap: 8px; }
.quiet-button, .primary-button { border-radius: 11px; padding: 10px 14px; font-weight: 750; }
.quiet-button { color: var(--text); background: transparent; border: 1px solid var(--line); }
.quiet-button:disabled { opacity: .4; cursor: not-allowed; }
.primary-button { border: 0; background: var(--accent); color: #221b0f; }
.results { text-align: center; border-color: #7e6a3c; background: linear-gradient(145deg, #2e271c, #18161d); }
.results h2 { font-family: Georgia, serif; font-size: 3rem; margin: 8px 0; }
.results p:not(.eyebrow) { color: var(--muted); }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 20px 0; }
.stats article { text-align: center; background: var(--surface); border: 1px solid var(--line); border-radius: 15px; padding: 18px 10px; }
.stats strong, .stats span { display: block; }
.stats strong { font-size: 1.75rem; color: var(--accent); }
.stats span { color: var(--muted); font-size: .8rem; margin-top: 5px; }
.game-ad-region { margin: 24px 0 8px; }
.game-ad-placement { min-height: 118px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 10px 0 14px; text-align: center; overflow: hidden; }
.game-ad-placement[hidden] { display: none !important; }
.game-ad-label { display: block; margin-bottom: 7px; color: var(--muted); text-transform: uppercase; letter-spacing: .12em; font-size: .62rem; }
.game-ad-placement .adsbygoogle { min-height: 90px; }
.game-ad-placement .adsbygoogle[data-ad-status="unfilled"] { display: none !important; }
footer { width: min(100% - 32px, 900px); margin: auto; padding: 30px 0 50px; color: #8f879d; font-size: .78rem; line-height: 1.55; text-align: center; }
dialog { width: min(92vw, 560px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 0; box-shadow: 0 40px 100px #000c; }
dialog::backdrop { background: #08070dcc; backdrop-filter: blur(5px); }
.dialog-content { padding: 28px; }
.dialog-content p:not(.eyebrow) { color: var(--muted); line-height: 1.6; }
@media (max-width: 680px) {
  .site-header { padding: 16px; }
  main { width: min(100% - 20px, 980px); margin-top: 0; }
  .hero { padding-top: 25px; }
  .puzzle-bookends { grid-template-columns: 1fr 1fr; gap: 10px; }
  .bookend-arrow { grid-column: 1 / -1; grid-row: 2; }
  .bookend-arrow b { transform: rotate(90deg); }
  .featured-card { padding: 10px; }
  .featured-card .eyebrow { font-size: .6rem; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .hint-controls { justify-content: flex-start; }
  .stats { gap: 6px; }
  .stats article { padding: 14px 5px; }
}
/* Card-image magnification keeps the surrounding layout fixed. */
.magnifiable-card {
  position: relative;
  z-index: 1;
  cursor: zoom-in;
  transform: translateZ(0) scale(1);
  transition: transform 160ms ease, box-shadow 160ms ease;
  outline: none;
  will-change: transform;
}
.featured-card .magnifiable-card:hover,
.featured-card .magnifiable-card:focus {
  z-index: 20;
  transform: translateZ(0) scale(1.48);
  box-shadow: 0 24px 55px #000c;
}
.chain-card .magnifiable-card {
  transform-origin: left center;
}
.chain-card .magnifiable-card:hover,
.chain-card .magnifiable-card:focus {
  z-index: 20;
  transform: translateZ(0) scale(5.2);
  box-shadow: 0 12px 28px #000c;
}
.magnifiable-card:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}
.featured-card,
.chain-card,
.puzzle-bookends,
.chain,
.play-panel {
  overflow: visible;
}
.pool-count { margin: 9px 2px 0; color: var(--muted); font-size: .78rem; }
.mode-switch button:disabled { opacity: .65; cursor: progress; }

@media (max-width: 680px) {
  .featured-card .magnifiable-card:hover,
  .featured-card .magnifiable-card:focus { transform: translateZ(0) scale(1.28); }
  .chain-card .magnifiable-card:hover,
  .chain-card .magnifiable-card:focus { transform: translateZ(0) scale(4.5); }
}

/* v0.4: Hard hints and bridge-letter display. */
.hard-hint-panel {
  margin: 18px 0 2px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  background: #0e0d14aa;
}
.hard-hint-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.hard-hint-heading p { margin-top: 0; }
.hard-hint-clue {
  margin: 3px 0 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.05rem;
  letter-spacing: .04em;
  color: var(--text);
}
.required-word-stack {
  position: relative;
  display: inline-grid;
  place-items: center;
  min-width: 4.5ch;
  margin-left: .3em;
  padding-top: 1.05em;
  vertical-align: middle;
}
.required-word-stack strong { line-height: 1; }
.bridge-letter {
  position: absolute;
  top: -.15em;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent-2);
  font-size: .86rem;
  font-weight: 900;
  line-height: 1;
  text-shadow: 0 0 12px #8ed8bc66;
}
.bridge-letter::after {
  content: "↓";
  display: block;
  margin-top: .05em;
  color: var(--muted);
  font-size: .62rem;
}
@media (max-width: 680px) {
  .hard-hint-heading { align-items: flex-start; flex-direction: column; }
}

/* v0.5: durable progress, expanded results, archive, and admin tooling. */
.header-nav { display: flex; align-items: center; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.link-button { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; }
.featured-card small { display: block; margin-top: 7px; color: var(--muted); font-size: .72rem; }
.stats-panel, .archive-panel, .admin-panel {
  background: #17151fdd;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 4vw, 30px);
  margin: 20px 0;
  backdrop-filter: blur(18px);
}
.section-note { margin: 0; color: var(--muted); font-size: .86rem; line-height: 1.5; }
.stats { grid-template-columns: repeat(4, 1fr); }
.result-metrics, .analysis-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9px;
  margin: 22px 0;
}
.result-metrics article, .analysis-metrics article {
  border: 1px solid #6e5c34;
  background: #17141a99;
  border-radius: 14px;
  padding: 14px 8px;
}
.result-metrics strong, .result-metrics span,
.analysis-metrics strong, .analysis-metrics span { display: block; }
.result-metrics strong, .analysis-metrics strong { color: var(--accent); font-size: 1.55rem; }
.result-metrics span, .analysis-metrics span { color: var(--muted); margin-top: 4px; font-size: .72rem; }
.route-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 22px 0; text-align: left; }
.route-comparison.single-route { grid-template-columns: 1fr; }
.route-comparison > div { border: 1px solid var(--line); border-radius: 14px; padding: 16px; background: #11101899; }
.route-comparison h3 { margin: 0 0 10px; font-size: .85rem; color: var(--accent); text-transform: uppercase; letter-spacing: .09em; }
.result-route { margin: 0; padding-left: 1.35rem; color: var(--text); }
.result-route li { padding: 4px 0; }
.archive-list { display: grid; gap: 9px; margin-top: 18px; }
.archive-row {
  display: grid;
  grid-template-columns: minmax(100px, .48fr) 1fr 1fr;
  gap: 9px;
  align-items: stretch;
}
.archive-date, .archive-puzzle-button {
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface-2);
  color: var(--text);
  padding: 12px 14px;
  text-align: left;
}
.archive-date { display: flex; flex-direction: column; justify-content: center; }
.archive-date strong, .archive-date span,
.archive-puzzle-button strong, .archive-puzzle-button span, .archive-puzzle-button small { display: block; }
.archive-date span, .archive-puzzle-button span, .archive-puzzle-button small { color: var(--muted); font-size: .72rem; margin-top: 3px; }
.archive-puzzle-button strong { margin-top: 5px; line-height: 1.35; }
.archive-puzzle-button:hover, .archive-puzzle-button:focus-visible { border-color: var(--accent); }
.archive-puzzle-button.completed { border-color: #3f6e61; box-shadow: inset 3px 0 var(--accent-2); }

.admin-main { width: min(100% - 32px, 1120px); }
.admin-hero { padding-bottom: 16px; }
.admin-hero h1 { font-size: clamp(2.6rem, 7vw, 4.8rem); }
.admin-warning {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid #7e6a3c;
  border-radius: 14px;
  padding: 14px 16px;
  background: #2e271c;
  color: var(--muted);
}
.admin-warning strong { color: var(--accent); white-space: nowrap; }
.admin-warning code { color: var(--text); }
.admin-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 20px; }
.admin-panel label, .field-label { display: grid; gap: 7px; color: var(--muted); font-size: .82rem; font-weight: 700; }
.admin-panel input, .admin-panel select, .admin-panel textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #0e0d14;
  color: var(--text);
  padding: 11px 12px;
  outline: none;
  font: inherit;
}
.admin-panel input:focus, .admin-panel select:focus, .admin-panel textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px #e2b86122; }
.admin-panel textarea { resize: vertical; margin: 7px 0 14px; }
.admin-panel > .primary-button { margin-top: 12px; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 13px; margin-bottom: 14px; }
.form-grid.three-columns { grid-template-columns: repeat(3, 1fr); }
.admin-actions { margin-top: 4px; }
.admin-status { margin-top: 16px; }
.status-list { display: grid; gap: 8px; margin: 0; }
.status-list div { display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); padding-bottom: 7px; }
.status-list dt { color: var(--muted); }
.status-list dd { margin: 0; text-align: right; }
.candidate-list, .schedule-list, .admin-route-list { display: grid; gap: 8px; margin-top: 15px; }
.candidate-button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  background: var(--surface-2);
  color: var(--text);
  text-align: left;
}
.candidate-button strong, .candidate-button span, .candidate-button small { display: block; }
.candidate-button span, .candidate-button small { color: var(--muted); margin-top: 4px; }
.candidate-button small { line-height: 1.4; }
.candidate-button:hover, .candidate-button:focus-visible { border-color: var(--accent); }
.analysis-results { margin-top: 12px; }
.admin-route-list > div { border: 1px solid var(--line); border-radius: 12px; padding: 11px 13px; }
.admin-route-list span, .admin-route-list strong { display: block; }
.admin-route-list span { color: var(--muted); font-size: .72rem; margin-bottom: 4px; }
.admin-route-list strong { line-height: 1.45; }
.schedule-row { display: flex; justify-content: space-between; gap: 16px; align-items: center; border: 1px solid var(--line); border-radius: 13px; padding: 12px 14px; background: var(--surface-2); }
.schedule-row strong, .schedule-row span { display: block; }
.schedule-row span { color: var(--muted); font-size: .76rem; margin-top: 4px; }

@media (max-width: 820px) {
  .header-nav { gap: 5px; }
  .header-nav .quiet-button { padding: 8px 10px; font-size: .78rem; }
  .stats, .result-metrics, .analysis-metrics { grid-template-columns: repeat(2, 1fr); }
  .archive-row { grid-template-columns: 1fr 1fr; }
  .archive-date { grid-column: 1 / -1; }
  .admin-grid { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 560px) {
  .site-header { align-items: flex-start; }
  .brand small { display: none; }
  .header-nav { max-width: 220px; }
  .route-comparison, .form-grid, .form-grid.three-columns { grid-template-columns: 1fr; }
  .archive-row { grid-template-columns: 1fr; }
  .archive-date { grid-column: auto; }
  .schedule-row { align-items: flex-start; flex-direction: column; }
  .admin-warning { flex-direction: column; }
}
.future-label { align-self: center; color: var(--muted); font-size: .75rem; }

/* v0.6: bidirectional chain building. */
.chain-gap {
  display: grid;
  place-items: center;
  gap: 5px;
  min-height: 76px;
  border: 1px dashed var(--accent);
  border-radius: 14px;
  background: #e2b8610d;
  color: var(--muted);
  text-align: center;
  padding: 12px;
}
.chain-gap span { font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; }
.chain-gap strong { color: var(--accent); font-size: 1.05rem; }
.bidirectional-requirements {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 7px;
  color: var(--muted);
}
.bidirectional-requirements > span { display: inline-flex; align-items: flex-end; gap: 5px; }
.bidirectional-requirements .requirement-divider {
  color: var(--text);
  font-weight: 800;
  text-transform: uppercase;
  font-size: .72rem;
  align-self: center;
}
#required-end-word { color: var(--accent-2); }

/* v0.7: dedicated history page and a shorter daily-game page. */
.selected-nav { border-color: var(--accent); color: var(--accent); }
.history-main { width: min(100% - 32px, 980px); }
.history-hero { padding-bottom: 12px; }
.history-hero h1 { font-size: clamp(2.7rem, 8vw, 5rem); }
.archive-puzzle-link { display: block; text-decoration: none; }
@media (max-width: 680px) {
  .history-main { width: min(100% - 20px, 980px); }
}

/* v0.8: Wordle-style completion popup keeps results off the main page. */
.actions { flex-wrap: wrap; }
.results-dialog {
  width: min(94vw, 620px);
  max-height: min(90vh, 780px);
  overflow: auto;
  border-color: #7e6a3c;
  background: linear-gradient(145deg, #2e271c, #18161d);
  overscroll-behavior: contain;
}
.results-dialog[open] { animation: results-pop 190ms ease-out; }
.results-dialog::backdrop { animation: results-fade 160ms ease-out; }
.results-modal-content {
  position: relative;
  padding: clamp(24px, 5vw, 36px);
  text-align: center;
}
.results-modal-content h2 {
  margin: 6px 36px 8px;
  font-family: Georgia, serif;
  font-size: clamp(2.15rem, 8vw, 3.35rem);
  line-height: 1;
}
.results-modal-content > p:not(.eyebrow) { margin: 0; color: var(--muted); }
.dialog-close-button {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #0e0d1499;
  color: var(--text);
  font-size: 1.55rem;
  line-height: 1;
}
.dialog-close-button:hover,
.dialog-close-button:focus-visible { border-color: var(--accent); }
.completion-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin: 0 auto 14px;
  border-radius: 999px;
  background: var(--accent);
  color: #221b0f;
  font-size: 2rem;
  font-weight: 900;
}
.result-route-details {
  margin: 18px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.result-route-details summary {
  cursor: pointer;
  padding: 14px 4px;
  color: var(--accent);
  font-weight: 750;
  text-align: center;
}
.result-route-details[open] summary { border-bottom: 1px solid var(--line); }
.result-route-details .route-comparison { margin: 14px 0; }
.result-dialog-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-top: 20px;
}
.result-dialog-actions button { min-height: 46px; }
@keyframes results-pop {
  from { opacity: 0; transform: translateY(16px) scale(.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes results-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .results-dialog[open], .results-dialog::backdrop { animation: none; }
}
@media (max-width: 560px) {
  .results-dialog { max-height: 92vh; }
  .results-modal-content { padding: 26px 18px 22px; }
  .results-modal-content h2 { margin-left: 30px; margin-right: 30px; }
  .result-dialog-actions { grid-template-columns: 1fr; }
  .result-dialog-actions .quiet-button { order: 2; }
}

/* v0.9: launch-hardening, two-sided hints, resilient loading, and touch previews. */
.daily-status {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}
.daily-status span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #0e0d14aa;
  color: var(--muted);
  padding: 6px 10px;
  font-size: .75rem;
  font-weight: 750;
}
.side-hint-controls { max-width: 520px; }
.hard-side-hints {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}
.hard-side-hints article {
  display: grid;
  gap: 9px;
  align-content: start;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
  padding: 12px;
}
.hard-side-hints article > span {
  color: var(--accent);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hard-side-hints .quiet-button { justify-self: start; }
.frontier-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  align-items: center;
  margin: 10px 0 13px;
}
.frontier-card {
  display: grid;
  justify-items: center;
  gap: 3px;
  min-height: 92px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: var(--surface-2);
  text-align: center;
}
.frontier-card > span:first-child {
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.frontier-forward > span:first-child, .frontier-forward strong { color: var(--accent); }
.frontier-backward > span:first-child, .frontier-backward strong { color: var(--accent-2); }
.frontier-card small { color: var(--muted); }
.frontier-card .required-word-stack { margin-left: 0; }
.search-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 9px;
}
.search-form .primary-button { min-width: 112px; }
.primary-button:disabled { opacity: .55; cursor: progress; }
.load-error-panel {
  display: grid;
  justify-items: start;
  gap: 8px;
  margin-top: 16px;
  border: 1px solid #7f4141;
  border-radius: 14px;
  background: #321d22;
  padding: 14px 16px;
}
.load-error-panel[hidden] { display: none; }
.load-error-panel p { margin: 0; color: var(--muted); }
.card-preview-dialog {
  width: auto;
  max-width: min(94vw, 520px);
  max-height: 94vh;
  overflow: auto;
  background: #0e0d14;
}
.card-preview-content { position: relative; padding: 18px; text-align: center; }
.card-preview-content > img {
  display: block;
  width: min(82vw, 390px);
  max-height: 78vh;
  aspect-ratio: 488 / 680;
  object-fit: contain;
  border-radius: 4.75% / 3.5%;
  background: var(--surface-2);
}
.card-preview-content > div:last-child { display: grid; gap: 4px; margin-top: 12px; }
.card-preview-content span { color: var(--muted); font-size: .78rem; }
@media (hover: none) {
  .featured-card .magnifiable-card:hover,
  .featured-card .magnifiable-card:focus,
  .chain-card .magnifiable-card:hover,
  .chain-card .magnifiable-card:focus { transform: none; box-shadow: none; }
}
@media (max-width: 680px) {
  .hard-side-hints { grid-template-columns: 1fr; }
  .frontier-grid { grid-template-columns: 1fr; }
  .frontier-grid > .requirement-divider { text-align: center; }
  .search-form { grid-template-columns: 1fr; }
  .search-form .primary-button { width: 100%; }
}
.validation-summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 12px 14px;
  margin-top: 14px;
}
.validation-summary.publishable { border-color: #3f6e61; background: #173128; }
.validation-summary.blocked { border-color: #7f4141; background: #321d22; }
.validation-summary span { color: var(--muted); font-size: .78rem; }
.validation-checks { display: grid; gap: 8px; margin-top: 14px; }
.validation-check {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
  background: var(--surface-2);
}
.validation-check > span {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  font-weight: 900;
}
.validation-check.pass > span { background: #275747; color: var(--accent-2); }
.validation-check.warning > span { background: #58451f; color: var(--accent); }
.validation-check.error > span { background: #632e36; color: var(--danger); }
.validation-check strong { display: block; }
.validation-check p { margin: 3px 0 0; color: var(--muted); font-size: .8rem; line-height: 1.45; }

/* v1.0: public-beta countdown, calendar, legal pages, and product health. */
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin-bottom: 12px; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--text); text-decoration: underline; }
.result-achievement, .result-comparison { color: var(--muted); margin: 7px 0 0; }
.result-achievement { color: #e9cf8b; font-weight: 700; }
.next-puzzle-countdown { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 16px 0; padding: 12px 14px; border: 1px solid var(--line); border-radius: 14px; background: #ffffff08; }
.next-puzzle-countdown span { color: var(--muted); font-size: .8rem; }
.next-puzzle-countdown strong { font-variant-numeric: tabular-nums; letter-spacing: .08em; }
.result-dialog-actions { flex-wrap: wrap; }
.result-dialog-actions button { flex: 1 1 145px; }
.history-legend { display: flex; flex-wrap: wrap; gap: 13px; margin: 6px 0 10px; color: var(--muted); font-size: .78rem; }
.history-legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend-dot { width: 10px; height: 10px; border-radius: 999px; border: 1px solid var(--line); background: #ffffff10; }
.legend-dot.solved { background: #4f8d77; border-color: #4f8d77; }
.legend-dot.perfect { background: var(--accent); border-color: var(--accent); }
.history-calendar { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 9px; margin-top: 18px; }
.history-day { min-width: 0; padding: 10px; border: 1px solid var(--line); border-radius: 14px; background: #ffffff07; }
.history-day.today { border-color: var(--accent); box-shadow: inset 0 0 0 1px #e2b86144; }
.history-day-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 5px; margin-bottom: 9px; }
.history-day-heading strong { font-size: .78rem; overflow: hidden; text-overflow: ellipsis; }
.history-day-heading span { color: var(--muted); font-size: .65rem; }
.history-mode-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.history-mode-button { display: grid; place-items: center; gap: 2px; min-height: 44px; border: 1px solid var(--line); border-radius: 10px; background: #0f0e14; color: var(--text); text-decoration: none; }
.history-mode-button span { font-weight: 800; }
.history-mode-button small { color: var(--muted); font-size: .62rem; }
.history-mode-button:hover, .history-mode-button:focus-visible { border-color: var(--accent); }
.history-mode-button.solved { border-color: #4f8d77; background: #20352f; }
.history-mode-button.perfect { border-color: var(--accent); background: #3b321d; }
.legal-main { width: min(100% - 32px, 820px); margin: 0 auto; }
.legal-hero { padding-bottom: 10px; }
.legal-panel { background: #17151fdd; border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(18px, 4vw, 30px); margin: 18px 0; }
.legal-panel h2 { margin-top: 0; font-family: Georgia, serif; }
.legal-panel p, .legal-panel li { color: var(--muted); line-height: 1.7; }
.legal-panel a { color: #e9cf8b; }
.privacy-toggle { display: flex; align-items: center; gap: 10px; margin: 18px 0 8px; color: var(--text); font-weight: 700; }
.privacy-toggle input { width: 20px; height: 20px; accent-color: var(--accent); }
@media (max-width: 820px) { .history-calendar { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
@media (max-width: 560px) {
  .history-calendar { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .history-day { padding: 8px; }
  .daily-status { gap: 6px; }
  .daily-status span { padding: 5px 8px; }
}

/* v1.0.6: hints live beside the exact frontier word they describe. */
.frontier-card {
  align-content: start;
  min-height: 178px;
}
.frontier-card .required-word-stack {
  min-height: 3.7rem;
  padding: 1.2rem 0;
}
.bridge-letter-above {
  top: -.05rem;
  bottom: auto;
}
.bridge-letter-above::after {
  content: "↓";
}
.bridge-letter-below {
  top: auto;
  bottom: -.05rem;
  color: var(--accent);
}
.bridge-letter-below::before {
  content: "↓";
  display: block;
  margin-bottom: .05em;
  color: var(--muted);
  font-size: .62rem;
}
.bridge-letter-below::after { content: none; }
.frontier-hint-clue {
  min-height: 1.25em;
  margin: 2px 0 0;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .88rem;
  letter-spacing: .025em;
  overflow-wrap: anywhere;
}
.frontier-hint-clue[hidden] { display: none; }
.frontier-hint-button {
  width: 100%;
  max-width: 270px;
  margin-top: auto;
  white-space: normal;
  line-height: 1.25;
}
.frontier-hint-summary {
  margin: -5px 0 10px;
  color: var(--muted);
  font-size: .78rem;
  text-align: center;
}
@media (max-width: 680px) {
  .frontier-card { min-height: 164px; }
}

/* v1.0.6: completed puzzles use a read-only board. */
#search-panel[hidden], #easy-panel[hidden] { display: none !important; }

/* v1.1: mobile-beta shell and installable PWA. */
.connection-banner {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid #7f4141;
  background: #321d22;
  color: var(--danger);
  padding: 9px 16px;
  text-align: center;
  font-size: .82rem;
  font-weight: 750;
}
.connection-banner[hidden], .update-toast[hidden], .mobile-tab-bar { display: none; }
.mobile-frontier-guide { display: none; }
.install-dialog { width: min(92vw, 480px); }
.install-dialog .dialog-content { position: relative; }
.install-steps { margin: 18px 0; padding-left: 1.35rem; color: var(--muted); line-height: 1.7; }
.install-steps strong { color: var(--text); }
.update-toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--accent);
  border-radius: 14px;
  background: #211d16;
  color: var(--text);
  padding: 11px 12px 11px 15px;
  box-shadow: 0 18px 48px #000a;
}
.offline-main {
  width: min(100% - 32px, 520px);
  margin: 12vh auto 0;
  text-align: center;
}
.offline-main img { border-radius: 24px; }
.offline-main h1 { font-family: Georgia, serif; font-size: clamp(2rem, 10vw, 3.5rem); }
.offline-main p:not(.eyebrow) { color: var(--muted); line-height: 1.6; }
.offline-main .primary-button { display: inline-flex; margin-top: 12px; text-decoration: none; }

@media (max-width: 720px) {
  :root { --mobile-tab-height: 64px; }
  html { scroll-padding-bottom: calc(var(--mobile-tab-height) + 84px + env(safe-area-inset-bottom)); }
  body.game-page, body.history-page {
    padding-bottom: calc(var(--mobile-tab-height) + env(safe-area-inset-bottom));
    background: radial-gradient(circle at top, #292234 0, var(--bg) 31rem);
  }
  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    min-height: 54px;
    padding: max(9px, env(safe-area-inset-top)) 12px 9px;
    border-bottom: 1px solid #393448aa;
    background: #111018e8;
    backdrop-filter: blur(18px);
  }
  .site-header .header-nav { display: none; }
  .brand { gap: 9px; }
  .brand-mark { width: 34px; height: 34px; border-radius: 10px; font-size: 18px; }
  .brand strong { font-size: .93rem; }
  .brand small { display: none; }

  main, .history-main {
    width: min(100% - 14px, 980px);
    margin: 0 auto 20px;
  }
  .hero, .history-hero { padding: 14px 4px 10px; }
  .hero h1, .history-hero h1 {
    margin: 3px 0 8px;
    font-size: clamp(2rem, 10vw, 3rem);
    line-height: 1;
  }
  .hero > p:last-of-type, .history-hero > p:last-of-type { margin: 0; font-size: .85rem; }
  .mode-switch { display: grid; width: 100%; margin-top: 11px; }
  .mode-switch button { min-height: 44px; padding: 8px 18px; }
  .daily-status {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    margin: 9px -3px 0;
    padding: 0 3px 4px;
  }
  .daily-status::-webkit-scrollbar { display: none; }
  .daily-status span { flex: 0 0 auto; }

  .puzzle-bookends {
    grid-template-columns: minmax(0, 1fr) 32px minmax(0, 1fr);
    gap: 5px;
    align-items: stretch;
    margin: 10px 0;
  }
  .featured-card {
    min-width: 0;
    padding: 8px 6px;
    border-radius: 15px;
    box-shadow: none;
  }
  .featured-card img { width: min(100%, 104px); margin: 6px auto; }
  .featured-card strong { display: block; overflow-wrap: anywhere; font-size: .82rem; line-height: 1.2; }
  .featured-card small { display: none; }
  .featured-card .eyebrow { font-size: .52rem; letter-spacing: .08em; }
  .bookend-arrow {
    grid-column: auto;
    grid-row: auto;
    align-self: center;
    font-size: .62rem;
  }
  .bookend-arrow span { display: none; }
  .bookend-arrow b { font-size: 1.55rem; transform: none; }

  .easy-panel, .play-panel, .stats-panel, .archive-panel {
    margin: 10px 0;
    padding: 14px;
    border-radius: 16px;
    backdrop-filter: none;
  }
  .section-heading {
    flex-direction: row;
    align-items: center;
    margin-bottom: 12px;
  }
  .section-heading h2 { font-size: 1.15rem; }
  .section-heading .eyebrow { font-size: .62rem; }
  .actions { margin-left: auto; gap: 5px; }
  .actions .quiet-button { min-height: 40px; padding: 8px 10px; font-size: .76rem; }

  .easy-slots { gap: 7px; }
  .easy-slot { min-height: 44px; padding: 9px 10px; font-size: .84rem; }
  .easy-slot span { width: 24px; height: 24px; }
  .chain { gap: 5px; }
  .chain-card { grid-template-columns: 46px 1fr; gap: 10px; padding: 6px; }
  .chain-card img { width: 46px; }
  .chain-card div span { font-size: .68rem; }
  .chain-card div strong { font-size: .87rem; }
  .connector { font-size: .66rem; }
  .chain-gap { min-height: 60px; padding: 9px; }

  .search-panel { margin-top: 16px; }
  .search-panel > label { font-size: .78rem; }
  .mobile-frontier-guide {
    display: block;
    margin: 0 0 7px;
    color: var(--muted);
    font-size: .7rem;
    text-align: center;
  }
  .frontier-grid {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(86%, 1fr);
    grid-template-columns: none;
    gap: 9px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory;
    scrollbar-width: none;
    margin: 7px -3px 10px;
    padding: 0 3px 4px;
  }
  .frontier-grid::-webkit-scrollbar { display: none; }
  .frontier-card { min-height: 148px; scroll-snap-align: center; padding: 10px; }
  .frontier-card .required-word-stack { min-height: 3rem; padding: .9rem 0; }
  .frontier-card > span:first-child { font-size: .66rem; }
  .frontier-hint-button { min-height: 42px; max-width: none; font-size: .78rem; }
  .frontier-grid > .requirement-divider {
    display: none;
  }
  .frontier-hint-summary { margin: -2px 0 8px; }

  .mobile-search-dock {
    position: sticky;
    bottom: calc(var(--mobile-tab-height) + env(safe-area-inset-bottom) + 8px);
    z-index: 45;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 7px;
    margin: 0 -7px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 15px;
    background: #111018f2;
    box-shadow: 0 12px 34px #000b;
    backdrop-filter: blur(16px);
  }
  .mobile-search-dock input[type="search"] { min-width: 0; min-height: 48px; padding: 12px; }
  .mobile-search-dock .primary-button { width: auto; min-width: 88px; min-height: 48px; padding: 10px 12px; }
  .pool-count { display: none; }
  .message { margin-top: 10px; font-size: .82rem; }
  .game-ad-region { margin: 18px 0 4px; }
  .game-ad-placement { min-height: 108px; padding-bottom: 10px; }
  .game-ad-placement .adsbygoogle { min-height: 80px; }
  body.game-page > footer, body.history-page > footer { display: none; }

  .mobile-tab-bar {
    position: fixed;
    inset: auto 0 0;
    z-index: 70;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    min-height: calc(var(--mobile-tab-height) + env(safe-area-inset-bottom));
    padding: 5px 8px env(safe-area-inset-bottom);
    border-top: 1px solid var(--line);
    background: #111018f2;
    backdrop-filter: blur(18px);
  }
  .mobile-tab {
    min-width: 0;
    min-height: 54px;
    border: 0;
    border-radius: 11px;
    background: transparent;
    color: var(--muted);
    display: grid;
    place-items: center;
    align-content: center;
    gap: 1px;
    padding: 4px;
    text-decoration: none;
  }
  .mobile-tab > span { font-size: 1.15rem; line-height: 1; }
  .mobile-tab small { font-size: .66rem; font-weight: 750; }
  .mobile-tab.active { color: var(--accent); background: #e2b86112; }
  .mobile-tab[hidden] { display: none; }
  .mobile-tab-bar:has(.install-app-button[hidden]) { grid-template-columns: repeat(3, 1fr); }

  .results-dialog {
    width: 100%;
    max-width: none;
    max-height: 92dvh;
    margin: auto 0 0;
    border-width: 1px 0 0;
    border-radius: 22px 22px 0 0;
  }
  .results-modal-content { padding: 22px 15px calc(18px + env(safe-area-inset-bottom)); }
  .result-metrics { gap: 6px; }
  .result-metrics article { padding: 10px 5px; }
  .result-metrics strong { font-size: 1.25rem; }
  .next-puzzle-countdown { margin: 11px 0; padding: 10px; }
  .card-preview-dialog {
    width: 100%;
    max-width: none;
    max-height: 100dvh;
    height: 100dvh;
    border: 0;
    border-radius: 0;
  }
  .card-preview-content {
    min-height: 100%;
    display: grid;
    place-items: center;
    align-content: center;
    padding: calc(44px + env(safe-area-inset-top)) 14px calc(20px + env(safe-area-inset-bottom));
  }
  .card-preview-content > img { width: min(88vw, 430px); max-height: 78dvh; }
  .install-dialog { margin: auto 0 0; width: 100%; max-width: none; border-radius: 22px 22px 0 0; }
  .install-dialog .dialog-content { padding-bottom: calc(24px + env(safe-area-inset-bottom)); }
  .update-toast {
    right: 10px;
    left: 10px;
    bottom: calc(var(--mobile-tab-height) + env(safe-area-inset-bottom) + 10px);
    justify-content: space-between;
  }

  .history-calendar { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
  .history-day { padding: 8px; }
  .stats-panel .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 360px) {
  .featured-card img { width: 86px; }
  .featured-card strong { font-size: .76rem; }
  .mobile-search-dock .primary-button { min-width: 76px; font-size: .8rem; }
  .frontier-grid { grid-auto-columns: minmax(92%, 1fr); }
}

/* v1.2: conditional 8 PM ET resolve reminders. */
.reminder-dialog { width: min(92vw, 520px); }
.reminder-dialog .dialog-content { position: relative; }
.reminder-states {
  display: grid;
  gap: 8px;
  margin: 16px 0;
}
.reminder-states p {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff07;
  color: var(--muted);
  line-height: 1.45;
}
.reminder-states strong { color: var(--text); }
.reminder-status {
  min-height: 2.8em;
  margin: 14px 0 5px;
  padding: 11px 12px;
  border-radius: 12px;
  background: #ffffff08;
  color: var(--muted);
  line-height: 1.45;
}
.reminder-status[data-kind="success"] { color: var(--accent-2); }
.reminder-status[data-kind="error"] { color: var(--danger); }
.reminder-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.reminder-actions button { flex: 1 1 145px; }
@media (max-width: 720px) {
  .reminder-dialog { width: min(96vw, 520px); margin-bottom: max(12px, env(safe-area-inset-bottom)); }
  .reminder-states { gap: 6px; }
  .reminder-states p { padding: 8px 10px; font-size: .84rem; }
}


/* v1.3: public content, contact form, and search-readiness pages. */
.rule-example { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 18px 0; padding: 15px; border: 1px solid var(--line); border-radius: 14px; background: #ffffff07; }
.rule-example strong { color: var(--text); }
.rule-example span { color: var(--accent); font-size: .8rem; font-weight: 800; }
.fan-disclaimer { border-color: #e2b86166; }
.contact-form { display: grid; gap: 16px; margin-top: 20px; }
.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.contact-form label { display: grid; gap: 7px; color: var(--text); font-weight: 750; }
.contact-form label span { color: var(--muted); font-size: .75rem; font-weight: 500; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 12px; background: #0f0e16; color: var(--text); padding: 12px 13px; font: inherit; }
.contact-form textarea { resize: vertical; min-height: 170px; line-height: 1.55; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: 2px solid #e2b86188; outline-offset: 2px; }
.contact-honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.contact-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.contact-status { flex: 1 1 260px; color: var(--muted); line-height: 1.45; }
.contact-status[data-kind="success"] { color: var(--accent-2); }
.contact-status[data-kind="error"] { color: var(--danger); }
.contact-message-list { display: grid; gap: 10px; margin-top: 14px; }
.contact-message { border: 1px solid var(--line); border-radius: 13px; padding: 13px; background: #ffffff05; }
.contact-message header { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.contact-message header span, .contact-message small { color: var(--muted); }
.contact-message p { margin: 8px 0; white-space: pre-wrap; line-height: 1.55; }
.contact-message .actions { justify-content: flex-end; }
@media (max-width: 620px) { .contact-grid { grid-template-columns: 1fr; } .rule-example { align-items: flex-start; } }