:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --page-bg: #f3f7f0;
  --surface: #fffefa;
  --surface-soft: #f9fbf6;
  --ink: #34413a;
  --muted: #87938c;
  --line: #e2e9df;
  --accent: #84a991;
  --accent-deep: #496956;
  --accent-wash: #e7f0e5;
  --cell-empty: #edf2e9;
  --block-1: #a7cdb0;
  --block-2: #97bd9d;
  --block-3: #7fa888;
  --cell-glow: 0 0 0 transparent;
  --piece-glow: 0 0 0 transparent;
  --accent-glow: 0 0 0 transparent;
  --accent-text-glow: none;
  --shadow: 0 20px 50px rgb(45 68 51 / 8%);
  --tile-gap: 7px;
}

:root[data-theme="sunset"] {
  --page-bg: #fcf3ef;
  --surface: #fffdfa;
  --surface-soft: #fff8f4;
  --ink: #4a3b37;
  --muted: #978780;
  --line: #efe2db;
  --accent: #d6a28e;
  --accent-deep: #79584d;
  --accent-wash: #f8e9e2;
  --cell-empty: #f5eae4;
  --block-1: #efc4b2;
  --block-2: #dfa992;
  --block-3: #c98e79;
  --shadow: 0 20px 50px rgb(75 54 44 / 8%);
}

:root[data-theme="lagoon"] {
  --page-bg: #eff7f7;
  --surface: #fdffff;
  --surface-soft: #f5fafa;
  --ink: #344347;
  --muted: #819093;
  --line: #deeaeb;
  --accent: #8bb8bc;
  --accent-deep: #4d6e72;
  --accent-wash: #e5f1f1;
  --cell-empty: #eaf2f1;
  --block-1: #b1d4d3;
  --block-2: #8ebec1;
  --block-3: #6f9fa5;
  --shadow: 0 20px 50px rgb(42 70 76 / 8%);
}

:root[data-theme="iris"] {
  --page-bg: #f8f1f6;
  --surface: #fffdfd;
  --surface-soft: #fcf7fa;
  --ink: #453b43;
  --muted: #91858e;
  --line: #ede3eb;
  --accent: #c49bb7;
  --accent-deep: #73596b;
  --accent-wash: #f2e8ef;
  --cell-empty: #f2eaf0;
  --block-1: #dfc4d8;
  --block-2: #c9a6c0;
  --block-3: #ad86a4;
  --shadow: 0 20px 50px rgb(67 51 64 / 8%);
}

:root[data-theme="citrus"] {
  --page-bg: #f5f7ed;
  --surface: #fffefa;
  --surface-soft: #fafbf4;
  --ink: #414437;
  --muted: #8a8d7b;
  --line: #e7e9dc;
  --accent: #a7b58a;
  --accent-deep: #65714e;
  --accent-wash: #edf0e3;
  --cell-empty: #edf0e5;
  --block-1: #c9d6ad;
  --block-2: #acbd87;
  --block-3: #8f9f69;
  --shadow: 0 20px 50px rgb(63 67 44 / 8%);
}

:root[data-theme="midnight"] {
  color-scheme: dark;
  --page-bg: #171d27;
  --surface: #222a35;
  --surface-soft: #29323d;
  --ink: #edf0f1;
  --muted: #a2abb2;
  --line: #3a434e;
  --accent: #75b7e8;
  --accent-deep: #274a65;
  --accent-wash: #253f54;
  --cell-empty: #303944;
  --block-1: #91c9f1;
  --block-2: #5aa3dc;
  --block-3: #347cb5;
  --shadow: 0 20px 50px rgb(4 10 18 / 25%);
}

:root[data-theme="rose"] {
  --page-bg: #fcf0f2;
  --surface: #fffdfd;
  --surface-soft: #fff7f8;
  --ink: #483b3f;
  --muted: #95868a;
  --line: #f0e1e4;
  --accent: #d29da8;
  --accent-deep: #79565f;
  --accent-wash: #f7e8eb;
  --cell-empty: #f5e9eb;
  --block-1: #ecc6cc;
  --block-2: #dca0ac;
  --block-3: #c77e8e;
  --shadow: 0 20px 50px rgb(75 53 59 / 8%);
}

:root[data-theme="neon"] {
  color-scheme: dark;
  --page-bg: #101311;
  --surface: #191d1a;
  --surface-soft: #222722;
  --ink: #f0f4ec;
  --muted: #a3ada0;
  --line: #353c35;
  --accent: #d5ff3f;
  --accent-deep: #344a18;
  --accent-wash: #2c381c;
  --cell-empty: #242a24;
  --block-1: #d5ff3f;
  --block-2: #ff5797;
  --block-3: #45e6d1;
  --cell-glow: 0 0 11px color-mix(in srgb, var(--cell-color) 76%, transparent), 0 0 24px color-mix(in srgb, var(--cell-color) 46%, transparent);
  --piece-glow: 0 0 10px color-mix(in srgb, var(--piece-color) 76%, transparent), 0 0 18px color-mix(in srgb, var(--piece-color) 44%, transparent);
  --accent-glow: 0 0 9px color-mix(in srgb, var(--accent) 72%, transparent), 0 0 21px color-mix(in srgb, var(--accent) 40%, transparent);
  --accent-text-glow: 0 0 9px color-mix(in srgb, var(--accent) 78%, transparent);
  --shadow: 0 20px 50px rgb(0 0 0 / 38%);
}

:root[data-theme="deepsea"] {
  color-scheme: dark;
  --page-bg: #162126;
  --surface: #202d31;
  --surface-soft: #29383c;
  --ink: #eaf1ed;
  --muted: #a1b1ac;
  --line: #3b4a4c;
  --accent: #58e0d0;
  --accent-deep: #1c625c;
  --accent-wash: #234541;
  --cell-empty: #2d3a3d;
  --block-1: #9af0e4;
  --block-2: #58d8c9;
  --block-3: #20aaa0;
  --shadow: 0 20px 50px rgb(0 0 0 / 30%);
}

:root[data-theme="ember"] {
  color-scheme: dark;
  --page-bg: #241b19;
  --surface: #302421;
  --surface-soft: #392b27;
  --ink: #f3ece6;
  --muted: #b9a69d;
  --line: #4a3933;
  --accent: #ff986b;
  --accent-deep: #713c2c;
  --accent-wash: #4d3027;
  --cell-empty: #3a2d29;
  --block-1: #ffc19b;
  --block-2: #f28b59;
  --block-3: #d7653f;
  --shadow: 0 20px 50px rgb(0 0 0 / 32%);
}

:root[data-theme="twilight"] {
  color-scheme: dark;
  --page-bg: #211d2b;
  --surface: #2b2637;
  --surface-soft: #342e41;
  --ink: #f0edf4;
  --muted: #b0a8b9;
  --line: #454052;
  --accent: #c89aff;
  --accent-deep: #593b79;
  --accent-wash: #403751;
  --cell-empty: #373145;
  --block-1: #dfc3ff;
  --block-2: #b987f0;
  --block-3: #8b55d1;
  --shadow: 0 20px 50px rgb(0 0 0 / 32%);
}

:root[data-theme="garden-night"] {
  color-scheme: dark;
  --page-bg: #18231e;
  --surface: #24312a;
  --surface-soft: #2d3b33;
  --ink: #edf1e9;
  --muted: #a7b2a6;
  --line: #3c4c40;
  --accent: #9fea80;
  --accent-deep: #3c673e;
  --accent-wash: #344b34;
  --cell-empty: #303d34;
  --block-1: #b9f49a;
  --block-2: #83db78;
  --block-3: #4bb966;
  --shadow: 0 20px 50px rgb(0 0 0 / 30%);
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--page-bg);
  color: var(--ink);
  transition: background-color 420ms ease, color 420ms ease;
}

button,
a {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.app-shell {
  width: min(1120px, calc(100% - 48px));
  min-height: 100vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.topbar {
  min-height: 88px;
  display: flex;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 10%, transparent);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 3px;
  transform: rotate(-7deg);
}

.brand-mark i {
  border-radius: 4px;
  background: var(--block-1);
  box-shadow: var(--accent-glow);
  transition: background-color 420ms ease, box-shadow 420ms ease;
}

.brand-mark i:nth-child(2) {
  background: var(--block-2);
}

.brand-mark i:nth-child(3) {
  background: var(--block-3);
}

.brand-mark i:nth-child(4) {
  background: var(--accent);
}

.brand-name {
  display: grid;
  gap: 1px;
  font-size: 12px;
  font-weight: 850;
  line-height: 1.05;
}

.brand-name span {
  color: var(--accent);
  text-shadow: var(--accent-text-glow);
  transition: color 420ms ease, text-shadow 420ms ease;
}

.segmented-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid color-mix(in srgb, var(--ink) 9%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 68%, transparent);
  transition: background-color 420ms ease, border-color 420ms ease;
}

.segmented-switch button {
  min-height: 31px;
  padding: 0 10px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 220ms ease, color 220ms ease, box-shadow 220ms ease;
}

.segmented-switch button[aria-pressed="true"] {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 4px rgb(20 30 25 / 10%), var(--accent-glow);
}

.mode-icon {
  width: 34px;
  display: grid;
  place-items: center;
  padding: 0 !important;
  font-size: 19px !important;
  line-height: 1;
}

.theme-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.theme-swatch,
.theme-note-swatch {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-wash), var(--accent-glow);
  transition: background-color 420ms ease, box-shadow 420ms ease;
}

.theme-status > span:last-child {
  display: grid;
  gap: 2px;
}

.theme-caption,
.eyebrow {
  color: var(--muted);
  font-size: 10px;
  font-weight: 750;
  line-height: 1.2;
}

.theme-status strong {
  font-size: 13px;
  font-weight: 700;
}

.new-game-button {
  min-height: 42px;
  padding: 0 17px;
  border: 0;
  border-radius: 7px;
  background: var(--accent-deep);
  color: #fff;
  box-shadow: var(--accent-glow);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, background-color 300ms ease, box-shadow 420ms ease;
}

.new-game-button:hover {
  transform: translateY(-1px);
}

.new-game-button:active {
  transform: translateY(0);
}

.game-layout {
  width: min(100%, 970px);
  flex: 1;
  align-self: center;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 278px;
  align-items: center;
  gap: clamp(34px, 7vw, 88px);
  padding: 48px 0 52px;
}

.game-stage {
  min-width: 0;
}

.game-heading {
  min-height: 91px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 20px;
}

.eyebrow {
  margin: 0 0 9px;
  letter-spacing: 1.2px;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 36px;
  font-weight: 800;
  line-height: 1;
}

h1 span {
  color: var(--accent);
  text-shadow: var(--accent-text-glow);
  transition: color 420ms ease, text-shadow 420ms ease;
}

.game-message {
  min-height: 18px;
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.score-strip {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  align-items: center;
  margin-bottom: 14px;
  padding: 15px 18px;
  border: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
  border-radius: 9px;
  background: color-mix(in srgb, var(--surface) 75%, transparent);
  transition: background-color 420ms ease;
}

.score-item {
  display: grid;
  gap: 4px;
  padding-left: 17px;
  border-left: 1px solid var(--line);
}

.score-item:first-child {
  padding-left: 0;
  border-left: 0;
}

.score-item span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
}

.score-item strong {
  font-size: 21px;
  font-weight: 760;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.score-primary strong {
  color: var(--accent);
  transition: color 420ms ease;
}

.board-frame {
  width: 100%;
  padding: 13px;
  border: 1px solid color-mix(in srgb, var(--ink) 7%, transparent);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: background-color 420ms ease, box-shadow 420ms ease;
}

.board {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: var(--tile-gap);
  touch-action: manipulation;
}

.board-cell {
  position: relative;
  min-width: 0;
  aspect-ratio: 1;
  padding: 0;
  border: 0;
  border-radius: 5px;
  background: var(--cell-empty);
  transition: background-color 260ms ease, transform 130ms ease, box-shadow 160ms ease;
  cursor: pointer;
}

.board-cell.is-preview {
  background: var(--cell-color, var(--block-1));
  transform: scale(.92);
  box-shadow: inset 0 0 0 2px rgb(255 255 255 / 58%), var(--cell-glow);
}

.board-cell.is-preview-invalid {
  background: #d87970 !important;
  transform: scale(.92);
  box-shadow: inset 0 -3px 0 rgb(0 0 0 / 10%);
}

.board-cell.is-filled {
  background: var(--cell-color, var(--block-1));
  box-shadow: inset 0 -3px 0 rgb(0 0 0 / 10%), var(--cell-glow);
}

.game-sidebar {
  align-self: center;
  padding-top: 50px;
}

.sidebar-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 20px;
}

.sidebar-heading .eyebrow {
  margin-bottom: 6px;
}

.sidebar-heading h2 {
  margin-bottom: 0;
  font-size: 23px;
  font-weight: 760;
  line-height: 1.1;
}

.piece-count {
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.piece-tray {
  display: grid;
  gap: 10px;
}

.piece-token {
  width: 100%;
  min-height: 89px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
  border-radius: 9px;
  background: color-mix(in srgb, var(--surface) 76%, transparent);
  cursor: pointer;
  transition: transform 150ms ease, border-color 220ms ease, background-color 220ms ease, box-shadow 220ms ease;
}

.piece-token:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 5px 16px rgb(25 55 37 / 8%);
}

.piece-token.is-selected {
  border-color: var(--accent);
  background: var(--accent-wash);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 18%, transparent);
}

.piece-token:disabled {
  opacity: .3;
  cursor: not-allowed;
}

.piece-visual {
  display: grid;
  grid-template-columns: repeat(5, 16px);
  grid-template-rows: repeat(5, 16px);
  gap: 3px;
}

.piece-cell {
  border-radius: 4px;
  background: var(--piece-color, var(--block-1));
  box-shadow: var(--piece-glow);
  transition: background-color 420ms ease, box-shadow 420ms ease;
}

.piece-hint {
  min-height: 18px;
  margin: 17px 0 25px;
  color: var(--muted);
  font-size: 12px;
}

.sidebar-rule {
  height: 1px;
  background: color-mix(in srgb, var(--ink) 10%, transparent);
}

.theme-note {
  display: flex;
  align-items: center;
  gap: 13px;
  padding-top: 20px;
}

.theme-note-swatch {
  width: 35px;
  height: 35px;
  border-radius: 9px;
  box-shadow: none;
}

.theme-note > div {
  display: grid;
  gap: 4px;
}

.theme-note strong {
  font-size: 13px;
  font-weight: 700;
}

.theme-note span:not(.theme-note-swatch) {
  color: var(--muted);
  font-size: 11px;
}

.page-footer {
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid color-mix(in srgb, var(--ink) 10%, transparent);
  color: var(--muted);
  font-size: 9px;
  font-weight: 750;
  letter-spacing: 1px;
}

.game-over-dialog {
  width: min(380px, calc(100% - 36px));
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
  text-align: center;
}

.game-over-dialog::backdrop {
  background: rgb(20 34 25 / 42%);
  backdrop-filter: blur(3px);
}

.dialog-mark {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
  margin: 0 auto 23px;
  padding: 9px;
  border-radius: 12px;
  background: var(--accent-wash);
}

.dialog-mark span {
  width: 7px;
  border-radius: 3px;
  background: var(--block-1);
}

.dialog-mark span:nth-child(1) {
  height: 13px;
}

.dialog-mark span:nth-child(2) {
  height: 23px;
  background: var(--block-2);
}

.dialog-mark span:nth-child(3) {
  height: 17px;
  background: var(--block-3);
}

.game-over-dialog h2 {
  margin: 0 0 22px;
  font-size: 25px;
}

.final-score-line {
  display: flex;
  justify-content: space-between;
  margin: 0 0 25px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.final-score-line strong {
  color: var(--ink);
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}

.dialog-button {
  width: 100%;
}

@media (max-width: 760px) {
  .app-shell {
    width: min(100% - 32px, 540px);
  }

  .topbar {
    min-height: 0;
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr);
    grid-template-areas:
      "brand brand action"
      "language appearance theme";
    column-gap: 10px;
    row-gap: 12px;
    padding: 14px 0;
  }

  .brand {
    grid-area: brand;
  }

  .language-switch {
    grid-area: language;
    width: max-content;
  }

  .appearance-switch {
    grid-area: appearance;
    width: max-content;
  }

  .new-game-button#new-game {
    grid-area: action;
    justify-self: end;
  }

  .theme-status {
    grid-area: theme;
    justify-self: end;
    margin-left: 0;
  }

  .theme-caption {
    display: none;
  }

  .new-game-button {
    min-height: 39px;
    padding: 0 12px;
    font-size: 12px;
  }

  .game-layout {
    width: 100%;
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
    padding: 28px 0 34px;
  }

  .game-heading {
    min-height: 76px;
    padding-bottom: 16px;
  }

  h1 {
    font-size: 31px;
  }

  .game-sidebar {
    padding-top: 0;
  }

  .sidebar-heading {
    margin-bottom: 13px;
  }

  .piece-tray {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 9px;
  }

  .piece-token {
    min-height: 83px;
  }

  .piece-hint {
    margin: 12px 0 15px;
  }

  .theme-note {
    display: none;
  }
}

@media (max-width: 390px) {
  .app-shell {
    width: calc(100% - 24px);
  }

  .topbar {
    gap: 9px;
  }

  .segmented-switch button {
    min-height: 29px;
    padding: 0 8px;
    font-size: 10px;
  }

  .mode-icon {
    width: 31px;
    padding: 0 !important;
    font-size: 17px !important;
  }

  .brand {
    gap: 8px;
  }

  .brand-mark {
    width: 29px;
    height: 29px;
  }

  .brand-name {
    font-size: 10px;
  }

  .theme-status {
    gap: 7px;
  }

  .theme-status strong {
    font-size: 11px;
  }

  .new-game-button {
    padding: 0 9px;
    font-size: 11px;
  }

  .board-frame {
    padding: 9px;
  }

  .board {
    --tile-gap: 5px;
  }

  .piece-visual {
    grid-template-columns: repeat(5, 13px);
    grid-template-rows: repeat(5, 13px);
    gap: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}