:root {
  --bg: #f7f4ef;
  --ink: #1a2421;
  --muted: #5c6b66;
  --primary: #1f5f56;
  --primary-hover: #174a43;
  --link: #1a5c54;
  --link-visited: #3d4f6b;
  --accent: #c9a227;
  --card: #fff;
  --border: #d9d2c6;
  --focus: #2a7a6d;
  --error: #9b2c2c;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "Segoe UI Mono", Consolas, monospace;
  --max: 60rem;
  --gutter: clamp(1rem, 4vw, 1.25rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
}

.wrap {
  width: min(100% - var(--gutter) * 2, var(--max));
  margin-inline: auto;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:visited {
  color: var(--link-visited);
}

a:hover,
a:focus-visible {
  color: var(--primary-hover);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 0;
}

.header-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "logo menu"
    "nav nav";
  align-items: center;
  column-gap: 1rem;
  row-gap: 0.5rem;
}

.wordmark {
  grid-area: logo;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.2;
}

.wordmark-mark {
  font-weight: 800;
}

/* Without JavaScript the nav stays visible and the toggle is hidden;
   main.js adds .has-menu-js once the toggle works. */
.menu-toggle {
  grid-area: menu;
  justify-self: end;
  display: none;
  min-height: 44px;
  padding: 0 1rem;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 6px;
  cursor: pointer;
}

.site-nav {
  grid-area: nav;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1rem;
  width: 100%;
  padding: 0.35rem 0 0.15rem;
  border-top: 1px solid var(--border);
}

.has-menu-js .menu-toggle {
  display: inline-flex;
  align-items: center;
  font: inherit;
  font-size: 1rem;
}

.has-menu-js .site-nav {
  display: none;
  flex-direction: column;
  gap: 0.15rem;
}

.has-menu-js .site-nav.is-open {
  display: flex;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 0 0.15rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--primary);
  text-decoration: underline;
}

@media (min-width: 768px) {
  .header-bar {
    grid-template-columns: auto 1fr;
    grid-template-areas: "logo nav";
    row-gap: 0;
  }

  .menu-toggle,
  .has-menu-js .menu-toggle {
    display: none;
  }

  .site-nav,
  .has-menu-js .site-nav {
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 1.1rem;
    width: auto;
    padding: 0;
    border-top: none;
  }
}

.day-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
  align-items: stretch;
}

.day-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 1rem;
  border-radius: 8px;
  border: 2px solid var(--primary);
  background: var(--card);
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.day-nav-link:hover,
.day-nav-link:focus-visible {
  background: #eef5f3;
}

.day-nav-link.is-current {
  background: var(--primary);
  color: #fff;
  pointer-events: none;
}

.puzzle-adjacent {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.puzzle-adjacent a {
  font-weight: 600;
}

.main-content {
  padding: 0.75rem 0 1.5rem;
}

h1 {
  font-size: clamp(1.75rem, 5vw, 2rem);
  line-height: 1.25;
  margin: 0 0 0.35rem;
}

h2 {
  font-size: 1.15rem;
  margin: 1rem 0 0.5rem;
}

.puzzle-meta,
.word-length-hint,
.meta-hint {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 0.75rem;
}

.letter-tiles {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 2.75rem));
  gap: clamp(0.25rem, 1.5vw, 0.5rem);
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
}

.letter-tiles li {
  aspect-ratio: 1;
  min-width: 0;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: clamp(1rem, 4.5vw, 1.1rem);
  background: var(--card);
  border: 2px solid var(--primary);
  border-radius: 8px;
  color: var(--primary);
}

.puzzle-actions,
.reveal-all-row,
.hint-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.45rem 1rem;
  border-radius: 8px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled),
.btn-primary:focus-visible:not(:disabled) {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--card);
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover:not(:disabled),
.btn-secondary:focus-visible:not(:disabled) {
  background: #eef5f3;
}

.btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.btn.copied {
  background: var(--accent);
  color: var(--ink);
}

.level-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.level-1 { border-left: 4px solid #5a8f7b; }
.level-2 { border-left: 4px solid #c9a227; }
.level-3 { border-left: 4px solid #6b4c7a; }

.level-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.clue-text {
  margin: 0 0 0.5rem;
}

.pattern-display {
  font-family: var(--mono);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  word-break: break-word;
  margin: 0.25rem 0 0.5rem;
}

.revealed-answer {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0.5rem 0;
  word-break: break-word;
}

.extra-count {
  font-size: 0.88rem;
  color: var(--muted);
}

.hint-status {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0 0 0.5rem;
  min-height: 0;
}

details {
  margin: 0.35rem 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.25rem 0.6rem;
  background: #faf9f7;
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--primary);
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

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

summary::before {
  content: "";
  flex: none;
  width: 0.5em;
  height: 0.5em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
}

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

summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.notice-waiting {
  background: #f0f2f1;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin: 0.5rem 0 1rem;
}

.notice-waiting p {
  margin: 0;
  font-size: 0.95rem;
}

.notice-waiting .notice-link {
  margin-top: 0.35rem;
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 0 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0.35rem 0;
}

.footer-links a {
  font-size: 0.9rem;
}

.recent-archive {
  margin-top: 1rem;
}

.date-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.date-list-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem 1rem;
}

@media (min-width: 640px) {
  .date-list-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.date-list-grid li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.5rem;
}

.date-link {
  font-weight: 600;
}

.puzzle-id {
  font-size: 0.85rem;
  color: var(--muted);
}

.archive-more {
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
}

.faq {
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
}

.faq details p {
  margin: 0.35rem 0 0.5rem;
  font-size: 0.95rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.prose p {
  margin: 0 0 1rem;
}

.contact-form label {
  display: block;
  margin-bottom: 0.75rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  font: inherit;
  padding: 0.5rem;
  margin-top: 0.25rem;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

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

.archive-search {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: 36rem;
  margin: 0.75rem 0;
}

.archive-search label {
  flex-basis: 100%;
  font-size: 0.95rem;
  color: var(--muted);
}

.archive-search input {
  flex: 1 1 12rem;
  min-width: 0;
  min-height: 44px;
  padding: 0 0.75rem;
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
}

.cal-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem 1.5rem;
  margin-top: 1rem;
}

@media (min-width: 768px) {
  .cal-list {
    grid-template-columns: 1fr 1fr;
  }
}

.cal-month {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem;
  max-width: 28rem;
}

.cal-title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 0.75rem;
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.cal-count {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
}

.cal-grid {
  width: 100%;
  table-layout: fixed;
  border-collapse: separate;
  border-spacing: 3px;
}

.cal-grid th {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.15rem 0;
}

@media (max-width: 359px) {
  .cal-wd-rest {
    display: none;
  }
}

.cal-day {
  padding: 0;
  text-align: center;
}

.cal-day a,
.cal-day span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 6px;
  font-size: 0.95rem;
}

.cal-day.has-puzzle a {
  background: #eef5f3;
  border: 2px solid var(--primary);
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.cal-day.has-puzzle a:hover,
.cal-day.has-puzzle a:focus-visible {
  background: var(--primary);
  color: #fff;
}

.cal-day.has-puzzle a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.cal-day.no-puzzle span {
  color: #a39d93;
}

.cal-day.is-today a,
.cal-day.is-today span {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.pagination {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-top: 1rem;
}