:root {
  --bg: #f4f1ea;
  --panel: rgba(255, 255, 255, 0.6);
  --panel-border: rgba(0, 0, 0, 0.08);
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --accent: #e09b1a;          /* used for surfaces, borders, large glyphs */
  --accent-ink: #8a5e0a;      /* darker variant for accent-colored text */
  --on-accent: #1a1a1a;       /* text/icons rendered ON the accent — stays dark in both themes */
  --letter-bg: #ffffff;
  --letter-border: #1a1a1a;
  --wildcard-bg: #2a548f;     /* darkened for white-text contrast (AA) */
  --wildcard-ink: #ffffff;
  --wildcard-border: #1a3a6c;
  --wildcard-glow: rgba(42, 84, 143, 0.55);
  --wildcard-chip-tint: rgba(42, 84, 143, 0.12);
  --target-glow: rgba(224, 155, 26, 0.55);
  --lattice-line: rgba(26, 26, 26, 0.05);
  --good: #1f7a36;
  --bad: #a52d2d;
}

[data-theme="dark"] {
  --bg: #1c1a17;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-border: rgba(255, 255, 255, 0.1);
  --ink: #e8e3d8;
  --muted: #8e887e;
  --accent: #f0b232;
  --accent-ink: #f0c060;
  /* --on-accent stays dark (chip text on yellow surface) */
  --letter-bg: #2a2723;
  --letter-border: #e8e3d8;
  --wildcard-bg: #4a78b8;
  --wildcard-ink: #ffffff;
  --wildcard-border: #6b9bd1;
  --wildcard-glow: rgba(107, 155, 209, 0.55);
  --wildcard-chip-tint: rgba(107, 155, 209, 0.18);
  --target-glow: rgba(240, 178, 50, 0.5);
  --lattice-line: rgba(232, 227, 216, 0.05);
  --good: #5cc46d;
  --bad: #e87878;
}

.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;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont,
    "Helvetica Neue", system-ui, sans-serif;
  background-color: var(--bg);
  /* Faint diagonal lattice texture — the brand "Latyce" comes from "lattice."
     Two thin diagonal gradients form an X pattern at low opacity. */
  background-image:
    linear-gradient(45deg, var(--lattice-line) 1px, transparent 1px),
    linear-gradient(-45deg, var(--lattice-line) 1px, transparent 1px);
  background-size: 22px 22px;
  background-attachment: fixed;
  color: var(--ink);
  min-height: 100vh;
  padding: 1.25rem 1rem 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header {
  text-align: center;
  margin-bottom: 1.25rem;
}

h1.wordmark {
  margin: 0;
  font-size: 1.85rem;
  letter-spacing: 0.04em;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-transform: none;
}

.wordmark-mark {
  width: 1.1em;
  height: 1.1em;
  color: var(--accent);
  display: inline-block;
  flex-shrink: 0;
}

.wordmark-text {
  /* Slight optical tweak: tighten the 'ty' pair so the name reads as one
     coined word rather than "Lat-Y-ce". */
  font-variant-ligatures: common-ligatures;
}

.date {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

main {
  width: 100%;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.puzzle-display {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 1.5rem 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.puzzle-display.target-locked {
  border-color: var(--accent);
}

.puzzle-display.target-glow {
  animation: target-glow 1.6s ease-out;
}

@keyframes target-glow {
  0%   { box-shadow: 0 0 0 0 var(--target-glow); }
  40%  { box-shadow: 0 0 0 18px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.target-found {
  margin-top: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.target-found[hidden] { display: none; }

.target-found .check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.7rem;
  font-weight: 700;
}

.letter-row,
.wildcard-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}

.wildcard-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin-top: 0.5rem;
}

.tile {
  font-weight: 700;
  font-size: 1.2rem;
  width: 2.4rem;
  height: 2.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  user-select: none;
  transition: transform 0.12s ease;
}

.tile.letter {
  background: var(--letter-bg);
  border: 2px solid var(--letter-border);
  color: var(--ink);
  text-transform: uppercase;
}

.tile.wildcard {
  background: var(--wildcard-bg);
  border: 2px solid var(--wildcard-border);
  color: var(--wildcard-ink);
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.tile.wildcard.pulse {
  animation: wildcard-pulse 0.75s ease-out;
}

@keyframes wildcard-pulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 var(--wildcard-glow);
  }
  40% {
    transform: scale(1.18);
    box-shadow: 0 0 0 14px transparent;
  }
  100% {
    transform: scale(1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  }
}

.help-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--letter-bg);
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
}

.help-btn:hover { opacity: 0.85; }

.input-area {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

#guessForm {
  display: flex;
  gap: 0.5rem;
}

#guessInput {
  flex: 1;
  padding: 0.7rem 0.9rem;
  font-size: 1.1rem;
  border: 2px solid var(--letter-border);
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  background: var(--letter-bg);
  color: var(--ink);
  font-family: inherit;
}

#guessInput:focus {
  outline: none;
  border-color: var(--accent);
}

#guessInput.shake {
  animation: shake 0.32s ease-in-out;
}

@keyframes shake {
  0%, 100%   { transform: translateX(0); }
  20%        { transform: translateX(-6px); }
  40%        { transform: translateX(5px); }
  60%        { transform: translateX(-4px); }
  80%        { transform: translateX(3px); }
}

#guessForm button {
  padding: 0 1.2rem;
  font-size: 0.95rem;
  background: var(--ink);
  color: var(--bg);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: inherit;
}

#guessForm button:hover { opacity: 0.9; }

.status {
  min-height: 1.2em;
  font-size: 0.9rem;
  color: var(--muted);
  padding-left: 0.2rem;
}

.status.good { color: var(--good); font-weight: 600; }
.status.bad { color: var(--bad); }

.progress {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 0.75rem 1rem;
  gap: 0.5rem;
}

.progress-stat {
  flex: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.progress-stat + .progress-stat {
  border-left: 1px solid var(--panel-border);
  padding-left: 0.5rem;
}

.progress-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
}

.progress-value {
  font-weight: 700;
  font-size: 1.05rem;
}

.progress-value { white-space: nowrap; }
.tier-stat .progress-value { color: var(--accent-ink); }
.tier-stat .progress-value.target { color: var(--good); }

.tier-button {
  appearance: none;
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  transition: background-color 0.15s ease;
  /* subtle dotted underline so it reads as interactive */
  text-decoration: underline dotted;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.tier-button:hover { background: var(--wildcard-chip-tint); }
.tier-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tier-badge {
  margin-top: 0.15rem;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
}

.tier-badge[hidden] { display: none; }

.progress-actions {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-self: center;
  margin-left: 0.4rem;
}

.share-btn,
.end-btn {
  padding: 0.4rem 0.8rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}

.share-btn {
  background: var(--ink);
  color: var(--bg);
}

.end-btn {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--ink);
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.end-btn.confirming {
  background: var(--bad);
  color: white;
  border-color: var(--bad);
  animation: reveal-pulse 1.2s ease-in-out infinite;
}

@keyframes reveal-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(165, 45, 45, 0); }
  50%      { box-shadow: 0 0 0 6px rgba(165, 45, 45, 0.18); }
}

.share-btn:hover,
.end-btn:hover { opacity: 0.85; }

.share-btn[hidden],
.end-btn[hidden] { display: none; }

.ended-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  margin-top: 0.25rem;
  padding: 0.6rem 0.9rem;
  background: var(--panel);
  border: 1px dashed var(--panel-border);
  border-radius: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.ended-banner[hidden] { display: none; }

.ended-banner-icon { font-size: 1rem; }

.input-area.ended #guessInput,
.input-area.ended #guessForm button {
  opacity: 0.5;
  cursor: not-allowed;
}

.found-words h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin: 0 0 0.5rem 0.2rem;
  font-weight: 600;
}

.found-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.found-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.found-group + .found-group {
  padding-top: 0.6rem;
  border-top: 1px dashed var(--panel-border);
}

.found-group-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  padding-left: 0.2rem;
}

.found-group-count {
  margin-left: 0.4rem;
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
}

.found-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

#foundList li {
  background: var(--letter-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 0.3rem 0.55rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  animation: word-pop 0.25s ease-out;
}

#foundList li.wildcard-used {
  border-color: var(--wildcard-border);
  background: var(--wildcard-chip-tint);
}

#foundList li.target {
  background: var(--accent);
  color: var(--on-accent);
  border-color: var(--accent);
}

@keyframes word-pop {
  from { transform: scale(0.85); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 10;
  animation: fade-in 0.2s ease-out;
}

.modal[hidden] { display: none; }

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  background: var(--bg);
  border-radius: 16px;
  padding: 1.5rem;
  max-width: 440px;
  width: 100%;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.modal-card h2 {
  margin: 0 0 0.75rem 0;
  font-size: 1.2rem;
}

.modal-card p {
  margin: 0 0 0.75rem 0;
  font-size: 0.95rem;
  line-height: 1.45;
}

.modal-card .modal-foot {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.example {
  margin: 0.75rem 0 1rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.example .wildcard-label { margin-top: 0.25rem; }

.example-row .tile {
  width: 2rem;
  height: 2rem;
  font-size: 1rem;
}
.example-row .tile.wildcard { font-size: 0.85rem; }

#helpClose,
#aboutClose,
#statsClose,
#tierClose {
  display: block;
  width: 100%;
  padding: 0.75rem;
  font-size: 0.95rem;
  background: var(--ink);
  color: var(--bg);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: inherit;
}

.modal-card.about-card {
  max-height: 80vh;
  overflow-y: auto;
}

.modal-card h3 {
  margin: 1.1rem 0 0.35rem 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  font-weight: 700;
}

.modal-card h3:first-of-type {
  margin-top: 0.2rem;
}

.modal-list {
  margin: 0 0 0.25rem 0;
  padding: 0;
  list-style: none;
}

.modal-list li {
  padding: 0.25rem 0;
  font-size: 0.9rem;
  line-height: 1.4;
}

.modal-list li::before {
  content: "·";
  margin-right: 0.5rem;
  color: var(--accent);
  font-weight: 700;
}

.tier-list li {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.07);
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
}

.tier-list li::before { content: none; }

.tier-list li span:last-child {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.tier-list li.current {
  background: var(--wildcard-chip-tint);
  border-left: 3px solid var(--accent);
  padding-left: calc(0.5rem - 3px);
}

.tier-list li.current span:first-child {
  font-weight: 700;
  color: var(--accent-ink);
}

.tier-list li.current span:last-child {
  color: var(--accent-ink);
}

.tier-progress {
  margin: 0 0 1rem 0;
  font-size: 0.95rem;
  color: var(--ink);
}

.tier-progress strong {
  color: var(--accent-ink);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin: 0.5rem 0 0.5rem;
}

.stat {
  background: var(--letter-bg);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 0.75rem 0.6rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-ink);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.stat-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
}

.page-footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-link {
  background: none;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  padding: 0.25rem 0.5rem;
}

.footer-link:hover { color: var(--ink); }

@media (max-width: 380px) {
  .tile { width: 2.1rem; height: 2.1rem; font-size: 1.05rem; }
  .tile.wildcard { font-size: 0.85rem; }
}