:root {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: rgba(15, 23, 42, 0.88);
  --panel-strong: #111827;
  --text: #e5eefb;
  --muted: #9fb1ca;
  --border: rgba(159, 177, 202, 0.22);
  --tile: #1f2937;
  --tile-border: #334155;
  --gray: #475569;
  --yellow: #d4a72c;
  --green: #2f855a;
  --accent: #38bdf8;
  --danger: #ef4444;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.3);
  --mobile-fit-scale: 1;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: #ffffff;
  --text: #102033;
  --muted: #52657e;
  --border: rgba(82, 101, 126, 0.18);
  --tile: #ffffff;
  --tile-border: #cbd5e1;
  --gray: #94a3b8;
  --yellow: #d4a72c;
  --green: #3b8f65;
  --accent: #0f766e;
  --danger: #dc2626;
  --shadow: 0 20px 48px rgba(148, 163, 184, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 14px;
  background: var(--accent);
  color: white;
  padding: 0.8rem 1.1rem;
  touch-action: manipulation;
  transition: transform 140ms ease, opacity 140ms ease, background 140ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

button.danger {
  background: var(--danger);
}

.shell {
  max-width: 1220px;
  margin: 0 auto;
  padding: 1.5rem;
}

.topbar,
.layout,
.stats-grid,
.modal-actions,
.guess-form,
.keyboard-row,
.board-row,
.board-header {
  display: flex;
  gap: 0.9rem;
}

.topbar,
.board-header {
  justify-content: space-between;
  align-items: center;
}

.mobile-summary-strip,
.mobile-accordion-stack {
  display: none;
}

.status-strip {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  align-items: stretch;
}

.topbar {
  margin-bottom: 1.5rem;
}

.topbar-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.topbar-actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
}

.button-icon {
  display: inline;
  font-size: 1.1em;
  line-height: 1;
}

.button-label {
  display: none;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.3rem);
}

.layout {
  align-items: flex-start;
  gap: 1.25rem;
}

.game-panel,
.sidebar {
  display: grid;
  gap: 1rem;
}

.game-panel {
  flex: 2;
  min-width: 0;
}

.sidebar {
  flex: 1;
  min-width: 280px;
}

.status-card,
.board-card,
.keyboard-card,
.stats-card,
.rules-card,
.message-box,
.remaining-panel,
.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.status-card,
.stats-card,
.rules-card,
.message-box,
.remaining-panel,
.board-card,
.keyboard-card,
.modal {
  border-radius: 24px;
  padding: 1rem;
}

.status-card {
  flex: 1 1 160px;
  min-width: 0;
}

.status-card span,
.stats-grid span,
.board-header,
.subtle,
.hint {
  color: var(--muted);
}

.status-card strong,
.stats-grid strong {
  display: block;
  margin-top: 0.25rem;
  font-size: 1.15rem;
}

.message-box.won {
  border-color: rgba(47, 133, 90, 0.5);
}

.message-box.lost {
  border-color: rgba(239, 68, 68, 0.55);
}

.board {
  display: grid;
  justify-items: center;
  margin-top: 0.75rem;
  overflow-x: auto;
}

.board-grid {
  display: grid;
  gap: 0.55rem;
  min-width: min-content;
}

.board-window-label {
  margin-bottom: 0.85rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.board-row {
  gap: 0.55rem;
}

.tile {
  width: clamp(3.2rem, 13vw, 4.1rem);
  height: clamp(3.2rem, 13vw, 4.1rem);
  border-radius: 4px;
  border: 2px solid var(--tile-border);
  background: var(--tile);
  display: grid;
  place-items: center;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  touch-action: manipulation;
}

.tile-green {
  background: var(--green);
  border-color: var(--green);
}

.tile-yellow {
  background: var(--yellow);
  border-color: var(--yellow);
}

.tile-gray {
  background: var(--gray);
  border-color: var(--gray);
}

.guess-form {
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  overflow-x: auto;
  padding-bottom: 0.15rem;
}

.settings-grid input,
.settings-grid select {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  color: var(--text);
}

.guess-form button {
  flex: 0 0 auto;
  padding: 0.8rem 0.95rem;
  white-space: nowrap;
}

.keyboard-card {
  display: grid;
  gap: 0.55rem;
  overflow-x: auto;
}

.keyboard-row {
  justify-content: center;
  flex-wrap: wrap;
  min-width: min-content;
}

.key {
  min-width: 2.6rem;
  background: var(--tile-border);
  color: var(--text);
  border-radius: 12px;
  padding: 0.8rem 0.7rem;
  touch-action: manipulation;
}

.key-wide {
  min-width: 4.8rem;
}

.key-gray {
  background: var(--gray);
}

.key-yellow {
  background: var(--yellow);
}

.key-green {
  background: var(--green);
}

.remaining-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.75rem;
  max-height: 220px;
  overflow: auto;
}

.word-chip {
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.18);
  border: 1px solid var(--border);
  font-size: 0.85rem;
}

.word-chip.muted {
  color: var(--muted);
}

.stats-grid {
  flex-wrap: wrap;
  margin-top: 1rem;
}

.stats-grid > div {
  flex: 1 1 45%;
  padding: 0.85rem;
  border-radius: 18px;
  background: rgba(148, 163, 184, 0.12);
}

.mobile-metric {
  flex: 1 1 0;
  text-align: center;
}

.mobile-metric span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.mobile-metric strong {
  display: block;
  margin-top: 0.2rem;
  font-size: 1.9rem;
}

.mobile-details-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.mobile-details-card summary {
  list-style: none;
  cursor: pointer;
  padding: 0.95rem 1rem;
  font-weight: 700;
}

.mobile-details-card summary::-webkit-details-marker {
  display: none;
}

.mobile-details-card summary::after {
  content: "+";
  float: right;
  color: var(--muted);
}

.mobile-details-card[open] summary::after {
  content: "−";
}

.mobile-details-body {
  display: grid;
  gap: 0.8rem;
  padding: 0 1rem 1rem;
}

.mobile-status-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mobile-rules-copy {
  color: var(--text);
}

.mobile-rules-copy p {
  line-height: 1.45;
}

.rules-card {
  display: grid;
  gap: 0.8rem;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
}

.modal {
  position: fixed;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  width: min(680px, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  overflow: auto;
  z-index: 10;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.icon-button {
  background: transparent;
  color: var(--text);
  border: none;
  font-size: 1.8rem;
  padding: 0 0.4rem;
}

.settings-grid {
  display: grid;
  gap: 0.9rem;
}

.settings-grid label {
  display: grid;
  gap: 0.45rem;
}

.checkbox-row {
  grid-template-columns: auto 1fr;
  align-items: center;
}

.checkbox-row input {
  width: auto;
}

.modal-actions {
  justify-content: flex-end;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 1100px) {
  .status-card {
    flex: 1 1 calc(50% - 0.9rem);
  }

  .guess-form {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .guess-form button {
    flex: 1 1 calc(50% - 0.6rem);
  }
}

@media (max-width: 980px) {
  .layout {
    flex-direction: column;
  }

  .sidebar,
  .game-panel {
    width: 100%;
  }

  .board-header {
    flex-wrap: wrap;
    gap: 0.4rem 0.9rem;
  }

  .remaining-panel {
    max-width: 100%;
  }

  .status-strip,
  .sidebar {
    display: none;
  }

  .mobile-summary-strip {
    display: flex;
    gap: 1.1rem;
    align-items: flex-start;
    justify-content: center;
  }

  .mobile-accordion-stack {
    display: grid;
    gap: 0.9rem;
  }
}

@media (max-width: 820px) {
  .shell {
    padding: 1.1rem;
  }

  .game-panel {
    display: flex;
    flex-direction: column;
  }

  h1 {
    font-size: clamp(1.8rem, 9vw, 2.8rem);
  }

  .board-card {
    order: 1;
  }

  .guess-form {
    order: 2;
  }

  .keyboard-card {
    order: 3;
  }

  [data-remaining-words-mount] {
    order: 4;
  }

  .message-box {
    order: 5;
  }

  .mobile-accordion-stack {
    order: 6;
  }

  .mobile-summary-strip {
    order: 0;
  }

  .tile {
    width: clamp(2.95rem, 14vw, 3.6rem);
    height: clamp(2.95rem, 14vw, 3.6rem);
    font-size: clamp(1.3rem, 5vw, 1.7rem);
  }

  .guess-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow-x: visible;
  }

  .guess-form button {
    width: 100%;
  }

  .keyboard-row {
    gap: 0.45rem;
  }

  .key {
    min-width: 2.35rem;
    padding: 0.72rem 0.45rem;
    border-radius: 10px;
  }

  .key-wide {
    min-width: 4.1rem;
  }

  .remaining-chip-list {
    max-height: 180px;
  }
}

@media (max-width: 640px) {
  .shell {
    padding: calc(0.7rem * var(--mobile-fit-scale));
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
    gap: calc(0.55rem * var(--mobile-fit-scale));
    margin-bottom: calc(0.7rem * var(--mobile-fit-scale));
  }

  .topbar-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(0.55rem * var(--mobile-fit-scale));
  }

  .mobile-summary-strip {
    gap: calc(0.6rem * var(--mobile-fit-scale));
  }

  .eyebrow {
    font-size: calc(0.62rem * var(--mobile-fit-scale));
    letter-spacing: 0.12em;
  }

  h1 {
    font-size: calc(1.7rem * var(--mobile-fit-scale));
    line-height: 1;
  }

  .topbar-actions button {
    padding: calc(0.65rem * var(--mobile-fit-scale)) calc(0.8rem * var(--mobile-fit-scale));
    border-radius: 12px;
    font-size: calc(0.95rem * var(--mobile-fit-scale));
  }

  .board {
    margin-top: calc(0.5rem * var(--mobile-fit-scale));
  }

  .board-header {
    gap: calc(0.3rem * var(--mobile-fit-scale)) calc(0.7rem * var(--mobile-fit-scale));
    font-size: calc(0.86rem * var(--mobile-fit-scale));
  }

  .board-row {
    gap: calc(0.3rem * var(--mobile-fit-scale));
  }

  .tile {
    width: calc(2.65rem * var(--mobile-fit-scale));
    height: calc(2.65rem * var(--mobile-fit-scale));
    border-radius: 4px;
    font-size: calc(1.22rem * var(--mobile-fit-scale));
  }

  .board-card,
  .keyboard-card,
  .remaining-panel,
  .stats-card,
  .rules-card,
  .message-box,
  .status-card {
    padding: calc(0.72rem * var(--mobile-fit-scale));
  }

  .guess-form {
    grid-template-columns: 1fr;
    gap: calc(0.5rem * var(--mobile-fit-scale));
  }

  .guess-form button {
    padding: calc(0.68rem * var(--mobile-fit-scale)) calc(0.8rem * var(--mobile-fit-scale));
    font-size: calc(0.94rem * var(--mobile-fit-scale));
  }

  .keyboard-card {
    padding: calc(0.6rem * var(--mobile-fit-scale));
    gap: calc(0.4rem * var(--mobile-fit-scale));
  }

  .keyboard-row {
    justify-content: stretch;
    flex-wrap: nowrap;
    gap: calc(0.32rem * var(--mobile-fit-scale));
  }

  .key {
    flex: 1 1 0;
    min-width: 0;
    font-size: calc(0.86rem * var(--mobile-fit-scale));
    padding: calc(0.62rem * var(--mobile-fit-scale)) calc(0.16rem * var(--mobile-fit-scale));
    border-radius: 9px;
  }

  .key-wide {
    flex: 1.35 1 0;
    min-width: 0;
  }

  .stats-grid > div {
    flex: 1 1 100%;
  }

  .mobile-metric span {
    font-size: calc(0.72rem * var(--mobile-fit-scale));
  }

  .mobile-metric strong {
    font-size: calc(1.45rem * var(--mobile-fit-scale));
  }

  .mobile-status-grid {
    grid-template-columns: 1fr;
  }

  .message-box p,
  .subtle {
    font-size: calc(0.94rem * var(--mobile-fit-scale));
    line-height: 1.35;
  }

  .word-chip {
    font-size: calc(0.76rem * var(--mobile-fit-scale));
    padding: calc(0.32rem * var(--mobile-fit-scale)) calc(0.55rem * var(--mobile-fit-scale));
  }

  .modal {
    inset: auto 1rem 1rem 1rem;
    transform: none;
    width: auto;
    max-height: calc(100vh - 2rem);
  }
}

@media (max-width: 420px) {
  .topbar-actions {
    grid-template-columns: auto auto;
    justify-content: end;
  }

  .eyebrow {
    display: none;
  }

  h1 {
    font-size: calc(1.42rem * var(--mobile-fit-scale));
  }

  .tile {
    width: calc(2.35rem * var(--mobile-fit-scale));
    height: calc(2.35rem * var(--mobile-fit-scale));
    font-size: calc(1.08rem * var(--mobile-fit-scale));
  }

  .board-card,
  .keyboard-card,
  .remaining-panel,
  .message-box {
    padding: calc(0.62rem * var(--mobile-fit-scale));
  }

  .board-header {
    font-size: calc(0.8rem * var(--mobile-fit-scale));
  }

  .topbar-actions button,
  .guess-form button {
    padding: calc(0.62rem * var(--mobile-fit-scale)) calc(0.72rem * var(--mobile-fit-scale));
    font-size: calc(0.9rem * var(--mobile-fit-scale));
  }

  .topbar-actions button {
    min-width: 2.45rem;
    gap: 0;
  }

  .mobile-summary-strip {
    gap: calc(0.45rem * var(--mobile-fit-scale));
  }

  .mobile-metric strong {
    font-size: calc(1.3rem * var(--mobile-fit-scale));
  }

  .key {
    font-size: calc(0.8rem * var(--mobile-fit-scale));
    padding: calc(0.56rem * var(--mobile-fit-scale)) calc(0.12rem * var(--mobile-fit-scale));
  }

  .status-card strong,
  .stats-grid strong {
    font-size: 1.02rem;
  }
}