:root {
  color-scheme: light;
  --bg: #f6f3ea;
  --panel: #fffdf6;
  --ink: #101820;
  --muted: #5e685f;
  --line: #d9d4c5;
  --accent: #006d77;
  --accent-strong: #004f57;
  --warn: #b64b34;
  --good: #287a4d;
  --shadow: 0 20px 50px rgba(16, 24, 32, .12);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root.color-safe {
  --bg: #f4f4f0;
  --panel: #ffffff;
  --ink: #111111;
  --muted: #555555;
  --line: #cfcfcf;
  --accent: #005ab5;
  --accent-strong: #003f7f;
  --warn: #dc3220;
  --good: #008a45;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(135deg, rgba(0, 109, 119, .12), transparent 38%),
    linear-gradient(315deg, rgba(255, 183, 3, .16), transparent 42%),
    var(--bg);
  color: var(--ink);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 18px clamp(16px, 3vw, 32px) 36px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 58px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: var(--panel);
}

.top-actions,
.game-actions,
.result-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.screen {
  display: none;
  animation: rise .28s ease both;
}

.is-hidden {
  display: none !important;
}

.screen.is-active {
  display: block;
}

.intro {
  max-width: 720px;
  margin: 54px 0 26px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.25rem, 6vw, 4.85rem);
  line-height: .96;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.25rem;
}

h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.intro-copy {
  max-width: 650px;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.5;
}

.setup-panel,
.summary-panel,
.leaderboard-panel,
.round-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 246, .88);
  box-shadow: var(--shadow);
}

.setup-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: clamp(16px, 3vw, 28px);
}

.field,
.word-entry {
  display: grid;
  gap: 8px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  color: var(--muted);
}

.checkbox-row input {
  width: auto;
  min-height: auto;
}

.field span,
.word-entry label,
.difficulty-group legend {
  color: var(--muted);
  font-size: .85rem;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  padding: 0 13px;
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 109, 119, .18);
}

.difficulty-group {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.difficulty-group legend {
  grid-column: 1 / -1;
  margin-bottom: 2px;
}

.difficulty-group label {
  display: flex;
  min-height: 72px;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 12px;
}

.difficulty-group input {
  width: 18px;
  min-height: 18px;
  accent-color: var(--accent);
}

.difficulty-group span {
  display: grid;
  gap: 3px;
  color: var(--ink);
  font-weight: 800;
}

.difficulty-group small,
.setup-note {
  color: var(--muted);
  font-weight: 600;
}

.daily-card {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 12px 16px;
}

.daily-card span {
  color: var(--muted);
  font-weight: 800;
}

.daily-card strong {
  font-size: clamp(1.35rem, 4vw, 2.25rem);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.daily-card.is-hidden-word strong {
  font-size: clamp(1rem, 3vw, 1.25rem);
  letter-spacing: 0;
  color: var(--muted);
}

.primary-button,
.secondary-button,
.ghost-button,
.icon-button {
  border: 0;
  border-radius: var(--radius);
  font-weight: 850;
}

.primary-button {
  min-height: 52px;
  background: var(--accent);
  color: white;
  padding: 0 18px;
}

.primary-button:hover {
  background: var(--accent-strong);
}

.secondary-button,
.ghost-button,
.icon-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.secondary-button,
.ghost-button {
  min-height: 46px;
  padding: 0 15px;
}

.icon-button {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  font-size: 1.1rem;
}

.danger {
  color: var(--warn);
}

.setup-note {
  grid-column: 1 / -1;
  min-height: 1.3em;
  margin: 0;
}

.game-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin: 40px 0 18px;
}

.timer {
  display: flex;
  align-items: baseline;
  gap: 4px;
  min-width: 106px;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 12px 16px;
  box-shadow: var(--shadow);
}

.timer span {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1;
}

.timer.is-low {
  color: var(--warn);
}

.letters-track {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(48px, 1fr));
  gap: 8px;
  margin: 0 0 18px;
}

.letter-tile {
  display: grid;
  min-height: 58px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .78);
  color: var(--muted);
  font-size: 1.45rem;
  font-weight: 900;
  text-transform: uppercase;
}

.letter-tile.is-active {
  background: var(--ink);
  color: #fff;
  transform: translateY(-2px);
}

.letter-tile.is-complete {
  background: rgba(40, 122, 77, .12);
  color: var(--good);
}

.letters-track.is-transitioning .letter-tile.is-active {
  animation: letter-pop .32s ease both;
}

.play-area {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
  gap: 16px;
  align-items: start;
}

.word-entry {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 246, .9);
  padding: clamp(16px, 3vw, 28px);
  box-shadow: var(--shadow);
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.feedback {
  min-height: 1.5em;
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.feedback.is-good {
  color: var(--good);
}

.feedback.is-bad {
  color: var(--warn);
}

.round-panel {
  min-height: 246px;
  padding: 16px;
}

.round-panel-head,
.panel-title-row,
.leaderboard li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.leaderboard li small {
  color: var(--muted);
  font-size: .7rem;
  margin-left: 4px;
}

.round-panel-head {
  margin-bottom: 12px;
  color: var(--muted);
  font-weight: 850;
}

.round-panel-head strong {
  color: var(--ink);
}

.word-list,
.leaderboard {
  list-style: none;
  margin: 0;
  padding: 0;
}

.word-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.word-list li {
  border-radius: 999px;
  background: rgba(0, 109, 119, .1);
  color: var(--accent-strong);
  padding: 7px 10px;
  font-weight: 800;
}

.game-actions {
  justify-content: flex-end;
  margin-top: 16px;
}

.result-hero {
  margin: 46px 0 22px;
}

.validating-panel {
  max-width: 760px;
  margin: 72px 0 24px;
}

.validating-panel p:last-child {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.5;
}

.validating-error {
  margin-top: 20px;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: rgba(182, 75, 52, .1);
  color: var(--warn);
  font-weight: 700;
  font-size: .95rem;
  text-align: center;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  width: 36px;
  height: 36px;
  margin: 24px auto;
  border: 3px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

.score-number {
  width: fit-content;
  min-width: 132px;
  margin-top: 16px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  padding: 12px 22px;
  font-size: 4rem;
  font-weight: 950;
  line-height: 1;
}

.score-detail {
  margin: 10px 0 0;
  color: var(--muted);
  font-weight: 850;
}

.card-preview {
  margin: 24px 0;
  display: flex;
  justify-content: left;
}

.card-canvas {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.result-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .8fr);
  gap: 16px;
}

.summary-panel,
.leaderboard-panel {
  padding: clamp(16px, 3vw, 24px);
}

.round-summary {
  display: grid;
  gap: 10px;
}

.summary-row,
.leaderboard li {
  border-top: 1px solid var(--line);
  padding: 10px 0;
}

.summary-row {
  display: grid;
  grid-template-columns: minmax(74px, .22fr) minmax(0, 1fr);
  gap: 16px;
}

.summary-letter {
  display: grid;
  align-content: start;
  gap: 4px;
}

.summary-letter strong {
  font-size: 1.25rem;
  text-transform: uppercase;
}

.summary-letter span,
.leaderboard span,
.panel-title-row span {
  color: var(--muted);
  font-weight: 750;
}

.summary-word-groups {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.summary-word-group {
  display: grid;
  gap: 6px;
}

.summary-word-group > span {
  color: var(--muted);
  font-size: .78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.summary-words {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.summary-words li {
  border-radius: 999px;
  padding: 6px 9px;
  font-weight: 800;
}

.summary-words.is-valid li {
  background: rgba(40, 122, 77, .12);
  color: var(--good);
}

.summary-words.is-rejected li {
  background: rgba(182, 75, 52, .12);
  color: var(--warn);
}

.summary-words li.is-empty {
  background: rgba(94, 104, 95, .1);
  color: var(--muted);
  font-weight: 700;
}

.summary-words li.is-validated-line {
  animation: validation-pop .28s ease both;
}

@keyframes validation-pop {
  from {
    opacity: 0;
    transform: translateY(4px) scale(.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.leaderboard li {
  counter-increment: rank;
}

.leaderboard li::before {
  content: counter(rank);
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: rgba(0, 109, 119, .12);
  color: var(--accent-strong);
  font-weight: 900;
}

.leaderboard b {
  margin-right: auto;
}

.result-actions {
  justify-content: flex-start;
  margin-top: 16px;
}

.tutorial-dialog {
  width: min(720px, calc(100vw - 28px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.tutorial-dialog::backdrop {
  background: rgba(16, 24, 32, .42);
}

.tutorial-checkbox {
  margin: 12px 20px 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.leaderboard-dialog,
.pseudo-dialog {
  width: min(400px, calc(100vw - 28px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.leaderboard-tabs {
  display: flex;
  gap: 4px;
  padding: 0 20px 4px;
}

.leaderboard-tabs .tab {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 6px 6px 0 0;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
  font-size: .82rem;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}

.leaderboard-tabs .tab:hover {
  background: rgba(0, 0, 0, .04);
  color: var(--ink);
}

.leaderboard-tabs .tab.is-active {
  background: rgba(0, 109, 119, .1);
  color: var(--accent-strong);
  border-color: var(--line);
  border-bottom-color: transparent;
}

.leaderboard li.is-user {
  background: rgba(0, 109, 119, .06);
  border-radius: 6px;
}

.leaderboard-dialog::backdrop,
.pseudo-dialog::backdrop {
  background: rgba(16, 24, 32, .42);
}

.pseudo-dialog .pseudo-form {
  display: flex;
  gap: 8px;
  padding: 0 20px;
}

.pseudo-dialog .pseudo-form input {
  flex: 1;
}

.pseudo-dialog .pseudo-form button {
  flex-shrink: 0;
}

.pseudo-dialog .ghost-button {
  margin: 0 20px 16px;
}

.leaderboard-date-nav-wrapper {
  padding: 8px 20px 4px;
}

.leaderboard-date-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.date-arrow {
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1;
}

.date-arrow:disabled {
  opacity: .3;
  cursor: default;
}

.date-display {
  flex: 1;
  text-align: center;
  font-weight: 700;
  font-size: .85rem;
  color: var(--ink);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.date-display:hover {
  background: rgba(0, 0, 0, .04);
}

.date-picker {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.today-button {
  background: rgba(0, 109, 119, .1);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 4px 10px;
  font-weight: 700;
  font-size: .75rem;
  color: var(--accent-strong);
  cursor: pointer;
  white-space: nowrap;
}

.today-button:hover {
  background: rgba(0, 109, 119, .2);
}

@media (max-width: 480px) {
  .today-button {
    display: none;
  }
  .leaderboard-date-nav-wrapper {
    padding: 6px 12px 2px;
  }
}

.leaderboard.is-loading {
  opacity: .5;
  transition: opacity .2s;
}

.leaderboard.is-loading li {
  pointer-events: none;
}

.leaderboard li.is-empty {
  display: block;
  text-align: center;
  padding: 20px 10px;
  color: var(--muted);
  font-weight: 700;
  font-size: .85rem;
}

.leaderboard li.is-empty .ghost-button {
  margin-top: 8px;
}

.dialog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.tutorial-steps {
  display: grid;
  gap: 12px;
}

.tutorial-steps article {
  display: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

.tutorial-steps article.is-active {
  display: block;
}

.tutorial-steps span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-weight: 900;
  margin-bottom: 10px;
}

.tutorial-steps p {
  max-width: 28em;
  white-space: pre-line;
}

.tutorial-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes letter-pop {
  0% {
    transform: translateY(6px) scale(.96);
  }
  100% {
    transform: translateY(-2px) scale(1);
  }
}

@media (max-width: 760px) {
  .app-shell {
    padding-top: 12px;
  }

  .brand span:last-child {
    display: none;
  }

  .intro {
    margin-top: 28px;
  }

  .setup-panel,
  .difficulty-group,
  .play-area,
  .result-grid,
  .summary-row {
    grid-template-columns: 1fr;
  }

  .game-header {
    align-items: start;
  }

  .input-row {
    grid-template-columns: 1fr;
  }

  .timer {
    min-width: 88px;
  }

  .timer span {
    font-size: 1.9rem;
  }

  .score-number {
    font-size: 3.1rem;
  }
}

.toast-notification {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100%);
  background: var(--warn);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .9rem;
  z-index: 1000;
  opacity: 0;
  transition: opacity .3s, transform .3s;
  pointer-events: none;
  max-width: 90vw;
  text-align: center;
}
.toast-notification.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.pseudo-hint {
  display: block;
  color: var(--muted);
  font-size: .75rem;
  margin: 0 20px 12px;
}