:root {
  --bg: #f7f3ea;
  --surface: #fffdf9;
  --ink: #2b2b2b;
  --muted: #6e6658;
  --line: #d8d0bf;
  --accent: #40636d;
  --accent-soft: #dae8ec;
  --danger: #a54f4f;
  --shadow: 0 8px 24px rgba(43, 43, 43, 0.08);
  --cell-min: 22px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -20%, #f3e7d3 0%, transparent 70%),
    radial-gradient(900px 500px at 90% 120%, #e4efe8 0%, transparent 70%),
    var(--bg);
}

h1,
h2 {
  margin: 0;
  font-weight: 700;
}

p {
  margin: 0;
}

a {
  color: var(--accent);
}

.site-header,
.site-footer {
  width: min(1200px, calc(100% - 2rem));
  margin: 1rem auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-footer {
  margin-top: 2rem;
  padding-bottom: 1.5rem;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
}

nav {
  display: flex;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  font-weight: 600;
}

.top-nav {
  align-items: center;
  flex-wrap: wrap;
}

.session-user {
  font-weight: 600;
  color: var(--muted);
}

.nav-btn {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
}

.shell {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto;
}

.screen {
  display: none;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.screen.active {
  display: block;
}

.lead {
  margin-top: 0.5rem;
  color: var(--muted);
}

.home-brand {
  display: flex;
  justify-content: center;
  margin-bottom: 0.9rem;
}

.home-brand-logo {
  width: 50vw;
  height: auto;
  display: block;
}

.login-form {
  margin-top: 1rem;
  display: grid;
  gap: 0.65rem;
  max-width: 360px;
}

.login-form label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
}

.login-form input {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
  font-size: 0.95rem;
  font-family: inherit;
  background: #fff;
  color: var(--ink);
}

.panel-grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.home-points-grid {
  margin: 1.1rem auto 0;
  width: min(78%, 760px);
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.home-points-grid .scoreboard {
  margin-top: 0;
}

.home-points-grid .scoreboard h3,
.home-points-grid .scoreboard .score-meta {
  text-align: center;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  background: #fff;
}

.option-grid {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

button,
.inline-link {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 10px;
  font-size: 0.95rem;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
}

button:hover,
.inline-link:hover {
  border-color: #b7ab93;
}

button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}

button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.action-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.home-actions {
  justify-content: center;
}

.action-row.compact {
  margin-top: 0;
}

.action-row.wrap {
  row-gap: 0.7rem;
}

.touch-help {
  display: none;
  margin: 0.65rem 0 0.2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.note {
  margin-top: 0.8rem;
  min-height: 1.4rem;
  color: var(--muted);
}

.version-note {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.levels-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.levels-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.6rem;
}

.level-tile {
  text-align: center;
  display: grid;
  justify-items: center;
  gap: 0.2rem;
}

.level-meta {
  color: var(--muted);
  font-size: 0.82rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
  text-align: center;
}

.level-meta-world-record {
  color: #9f2f2f;
  display: grid;
  justify-items: center;
  gap: 0.06rem;
  line-height: 1.15;
}

.level-meta-world-record.unplayed {
  color: var(--muted);
}

.level-meta-world-record-label {
  white-space: nowrap;
}

.level-meta-world-record-user {
  font-weight: 700;
  white-space: nowrap;
}

.level-meta-world-record-detail {
  display: block;
}

.level-meta-world-record-time {
  font-variant-numeric: tabular-nums;
}

.level-meta-world-record-unclaimed {
  color: var(--muted);
}

.puzzle-topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
}

.metadata {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  color: var(--muted);
  align-items: center;
}

.timer {
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  font-weight: 700;
}

.input-mode-control {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.input-mode-control select {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
  padding: 0.2rem 0.4rem;
  font-size: 0.82rem;
  font-family: inherit;
}

.puzzle-layout {
  margin-top: 0.8rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
}

.puzzle-play-area {
  min-width: 0;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.board-wrap {
  margin-top: 0.8rem;
  position: relative;
  display: block;
  width: min(100%, 860px);
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  overflow: auto;
  touch-action: none;
  overscroll-behavior: contain;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.board {
  display: grid;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.drag-size-indicator {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 5;
  padding: 0.22rem 0.45rem;
  border-radius: 999px;
  border: 1px solid #c3b7a1;
  background: rgba(255, 253, 248, 0.95);
  box-shadow: 0 4px 12px rgba(43, 43, 43, 0.13);
  font-size: 0.78rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #3f3a2f;
}

.cell {
  min-width: var(--cell-min);
  min-height: var(--cell-min);
  border: 1px solid #dfd8c9;
  display: grid;
  place-items: center;
  font-size: clamp(0.65rem, 0.95vw, 0.95rem);
  font-weight: 600;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.cell.filled {
  color: #2d2d2d;
}

.cell.draft {
  box-shadow: inset 0 0 0 2px rgba(64, 99, 109, 0.55);
}

.cell.touch-anchor {
  box-shadow: inset 0 0 0 3px rgba(64, 99, 109, 0.9);
}

.cell.touch-delete-candidate {
  box-shadow: inset 0 0 0 3px rgba(165, 79, 79, 0.92);
}

.lock-overlay {
  appearance: none;
  border: 0;
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(255, 252, 244, 0.86);
  font-weight: 600;
  font-size: 1rem;
  color: var(--muted);
  cursor: pointer;
}

.board-wrap.locked .lock-overlay {
  display: grid;
}

.board-wrap.locked .board {
  pointer-events: none;
}

.board-wrap.paused .board {
  visibility: hidden;
}

dialog {
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  width: min(440px, calc(100% - 2rem));
}

.scoreboard {
  margin-top: 0.75rem;
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fffcf6;
}

.scoreboard h3 {
  margin: 0;
  font-size: 0.95rem;
}

.score-meta {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.score-list {
  margin: 0.6rem 0 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 0.35rem;
}

.puzzle-scoreboard {
  margin-top: 0;
}

.leaderboard-toggle {
  display: none;
}

.score-entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-variant-numeric: tabular-nums;
  padding: 0.35rem 0.45rem;
  border-radius: 8px;
  gap: 0.7rem;
}

.score-entry.current {
  background: var(--accent-soft);
  font-weight: 700;
}

.score-entry.your-best {
  border: 1px solid #d8ccb7;
  background: #fff8ea;
  font-weight: 700;
}

.score-entry-main {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.score-entry-time {
  flex: 0 0 auto;
}

.home-points-value {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-variant-numeric: tabular-nums;
}

.home-points-count {
  min-width: 1ch;
  text-align: right;
}

.home-points-icon {
  width: 1rem;
  height: 1rem;
  object-fit: contain;
  display: block;
}

.home-points-value.donut {
  color: #8b5e34;
}

.home-points-value.sprinkle {
  color: #a54f4f;
}

.score-empty {
  color: var(--muted);
}

dialog::backdrop {
  background: rgba(30, 30, 30, 0.35);
}

.toast-root {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  gap: 0.5rem;
  z-index: 20;
}

.toast {
  border: 1px solid var(--line);
  border-left-width: 4px;
  border-left-color: var(--accent);
  padding: 0.65rem 0.8rem;
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.toast.error {
  border-left-color: var(--danger);
}

.content-page {
  display: grid;
  gap: 1rem;
}

.content-page ul,
.content-page ol {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.4rem;
}

@media (max-width: 900px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .home-points-grid {
    width: 100%;
    grid-template-columns: 1fr;
  }

  .site-header,
  .site-footer,
  .shell {
    width: calc(100% - 1rem);
  }

  .puzzle-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .puzzle-layout {
    grid-template-columns: 1fr;
  }

  .leaderboard-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
  }

  .touch-help {
    display: block;
  }

  .board-wrap {
    max-height: 70vh;
  }

  .action-row button,
  .action-row .inline-link {
    min-height: 42px;
    font-size: 1rem;
    padding: 0.65rem 0.95rem;
  }
}