/* Four worlds share interface tokens and accessible controls. */
:root {
  --secondary: #a4ffd0;
  --surface-solid: #07110b;
  --game-empty: #0c1d12;
  --danger: #ff9c9c;
}
[data-theme="universe"] {
  --bg: #060510;
  --surface: rgba(14, 11, 30, 0.92);
  --surface-solid: #100d22;
  --sidebar: #0a0817;
  --text: #eee9ff;
  --muted: #aca3c8;
  --line: #363052;
  --green: #bca8ff;
  --lime: #bca8ff;
  --green-soft: #27203d;
  --orange: #ffd0a0;
  --secondary: #ffd0a0;
  --game-empty: #201a32;
}
[data-theme="accelerator"] {
  --bg: #020b10;
  --surface: rgba(5, 19, 27, 0.94);
  --surface-solid: #071720;
  --sidebar: #031019;
  --text: #ddf5ff;
  --muted: #8caebc;
  --line: #214957;
  --green: #63e7ff;
  --lime: #63e7ff;
  --green-soft: #092d39;
  --orange: #ffb75e;
  --secondary: #ffb75e;
  --game-empty: #092733;
}
[data-theme="synthwave"] {
  --bg: #090511;
  --surface: rgba(18, 8, 30, 0.93);
  --surface-solid: #160b24;
  --sidebar: #10081d;
  --text: #ffebfa;
  --muted: #bc9bbc;
  --line: #4f2855;
  --green: #ff86d3;
  --lime: #ff86d3;
  --green-soft: #36142f;
  --orange: #72ebff;
  --secondary: #72ebff;
  --game-empty: #291332;
}
.sidebar {
  background: color-mix(in srgb, var(--sidebar) 96%, transparent);
  gap: 15px;
}
.nav a {
  padding-inline: 8px;
}
.nav a.active,
.nav a:hover,
.filter.active {
  background: var(--green-soft);
  border-color: var(--line);
}
.search-trigger,
.hero,
.btn,
.pill,
.cta-strip,
.stack-description,
dialog {
  background: var(--surface);
  border-color: var(--line);
}
.icon-btn:hover,
.btn:hover,
.writing-row:hover,
.search-results a:hover,
.studio-item:hover {
  background: var(--green-soft);
}
.hero .btn {
  background: var(--surface);
  border-color: var(--line);
}
.btn-primary,
.hero .btn-primary {
  background: var(--green);
  color: var(--bg);
  border-color: var(--green);
}
.btn-primary:hover,
.hero .btn-primary:hover {
  background: color-mix(in srgb, var(--green) 72%, white);
  color: var(--bg);
}
.hero h2 {
  color: var(--text);
}
.hero h2 em {
  text-shadow: 0 0 24px color-mix(in srgb, var(--green) 22%, transparent);
}
.terminal-window-title,
.terminal-window-footer {
  background: color-mix(in srgb, var(--green-soft) 55%, transparent);
}
.terminal-window-title > span:last-child,
.console-title,
.session-console dt,
.terminal-window-footer,
.search-trigger kbd {
  color: var(--muted);
}
.terminal-window-title i {
  border-color: var(--green);
}
.terminal-window-title i:first-child {
  background: var(--green);
  border-color: var(--green);
}
.tag,
.toolkit .tag,
.stat-icon,
.skill-mark,
.writing-icon,
.ut-mark {
  background: var(--green-soft);
  color: var(--green);
  border-color: var(--line);
}
.stat,
.project-card,
.project-body,
.studio-item,
.form input,
.form textarea,
.form select,
.markdown-preview {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line);
}
.form input:focus,
.form textarea:focus,
.form select:focus {
  border-color: var(--green);
}
.toast {
  background: var(--surface-solid);
  color: var(--text);
  border-color: var(--green);
}
::selection {
  background: var(--green);
  color: var(--bg);
}
:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
}
.matrix-vignette {
  background: radial-gradient(
    ellipse at 50% 45%,
    transparent 15%,
    color-mix(in srgb, var(--bg) 40%, transparent) 100%
  );
}
[data-theme="universe"] #matrix-rain,
[data-theme="accelerator"] #matrix-rain,
[data-theme="synthwave"] #matrix-rain {
  opacity: 0.86;
}
[data-theme="universe"] body::after {
  opacity: 0.08;
}
[data-theme="universe"] .hero,
[data-theme="universe"] .panel,
[data-theme="universe"] .project-card,
[data-theme="universe"] .game-console {
  border-radius: 12px;
  box-shadow: 0 8px 50px #0005;
}
[data-theme="universe"] .terminal-window-title {
  background: #211a394d;
}
[data-theme="accelerator"] .hero,
[data-theme="accelerator"] .game-console {
  border-top: 2px solid var(--green);
}
[data-theme="accelerator"] h1,
[data-theme="accelerator"] .arcade-banner h2 {
  letter-spacing: -1px;
}
[data-theme="synthwave"] .hero {
  box-shadow:
    0 0 30px #ff35ad0a,
    0 0 60px #492aff0a;
}
[data-theme="synthwave"] .nav a.active {
  box-shadow: inset 0 -2px var(--green);
}
[data-theme="synthwave"] .brand-mark,
[data-theme="synthwave"] .hero h2 em {
  text-shadow: 0 0 18px #ff53c775;
}
.theme-trigger {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--green);
  font-size: 10px;
  padding: 5px 10px;
  min-height: 30px;
  border-radius: 3px;
}
.theme-trigger:hover {
  border-color: var(--green);
}
#theme-dialog,
#skill-dialog {
  width: min(650px, calc(100% - 30px));
  max-height: calc(100dvh - 40px);
  padding: 28px;
  overflow-y: auto;
  color: var(--text);
  box-shadow: 0 25px 100px #000a;
}
#theme-dialog[open],
#skill-dialog[open] {
  animation: dialog-arrive 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}
@keyframes dialog-arrive {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.95);
    filter: blur(5px);
  }
  to {
    opacity: 1;
    transform: none;
    filter: none;
  }
}
.skill-dialog-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 15px;
  margin-bottom: 25px;
}
.skill-dialog-head h2 {
  font-size: 22px;
  margin-top: 9px;
}
.skill-dialog-head .eyebrow {
  font-size: 9px;
}
.theme-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.theme-option {
  min-width: 0;
  text-align: left;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface-solid);
  transition:
    border-color 0.2s,
    transform 0.2s;
}
.theme-option:hover {
  border-color: var(--green);
  transform: translateY(-2px);
}
.theme-option.selected {
  border-color: var(--green);
}
.theme-option-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 14px 2px 4px;
  font-size: 14px;
  gap: 7px;
}
.theme-option-title span {
  font-size: 8px;
  color: var(--green);
}
.theme-option > small {
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--muted);
  padding: 0 2px;
}
.theme-option p {
  font-size: 10px;
  color: var(--muted);
  margin: 8px 2px 5px;
  min-height: 48px;
}
.theme-preview {
  height: 98px;
  display: block;
  position: relative;
  overflow: hidden;
  background: #030805;
}
.preview-dark {
  background: repeating-linear-gradient(
    90deg,
    #021307 0 8px,
    #04240d 9px 10px,
    #020b06 11px 25px
  );
}
.preview-dark::after {
  content: "0101  ｶ  01  ｼ  10  ｽ  101\Aﾐ  1010  ｵ  10  ｱ  01  ｳ\A01  ﾂ  11  ｹ  00  ﾐ  111\A101  ｶ  01  ｼ  10  ｽ  001";
  white-space: pre;
  position: absolute;
  inset: 5px;
  color: #38cb64;
  opacity: 0.7;
  font: 15px/1.4 monospace;
  letter-spacing: 4px;
}
.preview-universe {
  background: radial-gradient(
    ellipse at 52% 47%,
    #04020a 0 19%,
    #ddbaed 20% 21%,
    #6f2d8255 22% 28%,
    #070412 55%
  );
}
.preview-universe::before {
  content: "";
  position: absolute;
  top: 28%;
  left: 20%;
  width: 65%;
  height: 41%;
  border: 2px solid #dc93dd;
  border-radius: 50%;
  transform: rotate(-18deg);
  box-shadow: 0 0 12px #b877bb;
}
.preview-universe::after {
  content: "·        ✧               ·\A    ·           ·            ✧\A          ·           ·";
  white-space: pre;
  position: absolute;
  color: #c6b2ff;
  inset: 5px;
  font-size: 12px;
}
.preview-accelerator {
  background: #020e16;
}
.preview-accelerator::before {
  content: "";
  position: absolute;
  inset: 17px 27px;
  border: 2px solid #36d9ff;
  border-radius: 50%;
  box-shadow:
    0 0 0 6px #219fcb28,
    0 0 0 12px #219fcb15,
    0 0 25px #03d7ff44;
  transform: rotate(-14deg);
}
.preview-accelerator::after {
  content: "";
  position: absolute;
  height: 5px;
  width: 5px;
  left: 35%;
  top: 19px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 15px 5px #48dcff;
}
.preview-synthwave {
  background:
    radial-gradient(
      circle at 65% 39%,
      #fda260 0 12%,
      #e744a5 13% 21%,
      transparent 22%
    ),
    linear-gradient(#110921 60%, #55245c 61%, #0b0619 62%);
}
.preview-synthwave::after {
  content: "";
  position: absolute;
  top: 60%;
  height: 100%;
  width: 150%;
  left: -25%;
  background:
    repeating-linear-gradient(90deg, transparent 0 30px, #943dbc 31px 32px),
    repeating-linear-gradient(0deg, transparent 0 14px, #e03eaa 15px 16px);
  transform: perspective(60px) rotateX(40deg);
  transform-origin: top;
}
.theme-note {
  font-size: 10px;
  color: var(--muted);
  margin-top: 20px;
}
.stack-groups {
  align-items: start;
}
.skill-button {
  width: 100%;
  display: flex;
  gap: 13px;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 13px 0;
  min-height: 62px;
}
.skill-button > span:nth-child(2) {
  flex: 1;
  font-size: 12px;
}
.skill-button .skill-mark {
  flex-shrink: 0;
}
.skill-button .skill-explore {
  color: var(--muted);
  font-size: 9px;
  opacity: 0.5;
  transition:
    opacity 0.2s,
    transform 0.2s;
  white-space: nowrap;
}
.skill-button:hover .skill-explore,
.skill-button:focus-visible .skill-explore {
  opacity: 1;
  color: var(--green);
  transform: translateX(3px);
}
.skill-button:hover .skill-mark {
  border-color: var(--green);
  box-shadow: 0 0 18px color-mix(in srgb, var(--green) 10%, transparent);
}
#skill-dialog {
  position: fixed;
  overflow-x: hidden;
  padding-bottom: 32px;
}
.skill-scan {
  height: 1px;
  background: var(--green);
  box-shadow: 0 0 15px var(--green);
  position: absolute;
  inset: 0 0 auto;
  pointer-events: none;
  animation: skill-scan 0.65s ease-out forwards;
}
@keyframes skill-scan {
  from {
    top: 0;
    opacity: 0.8;
  }
  to {
    top: 100%;
    opacity: 0;
  }
}
.skill-orbit {
  position: relative;
  width: 92px;
  height: 92px;
  display: grid;
  place-items: center;
  margin: 0 0 22px;
}
.skill-orbit span {
  width: 62px;
  height: 62px;
  border: 1px solid var(--green);
  background: var(--green-soft);
  display: grid;
  place-items: center;
  font-size: 20px;
  color: var(--green);
}
.skill-orbit i {
  position: absolute;
  inset: 0;
  border: 1px dashed var(--line);
  border-radius: 50%;
  animation: orbit-skill 18s linear infinite;
}
.skill-orbit i::after {
  content: "";
  position: absolute;
  top: 5px;
  left: 12px;
  width: 5px;
  height: 5px;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  border-radius: 50%;
}
.skill-orbit i:nth-child(2) {
  inset: -8px;
  transform: rotate(40deg);
  border-style: solid;
  border-color: color-mix(in srgb, var(--line) 55%, transparent);
  animation-direction: reverse;
}
@keyframes orbit-skill {
  to {
    transform: rotate(360deg);
  }
}
#skill-title {
  font-size: 29px;
  color: var(--green);
  margin-bottom: 16px;
}
.skill-about {
  font-size: 13px;
  line-height: 1.95;
  color: var(--text);
  animation: skill-copy 0.45s 0.08s both;
}
.skill-uses {
  margin: 23px 0;
  animation: skill-copy 0.45s 0.16s both;
}
.skill-uses .tags {
  margin-top: 11px;
}
.skill-fact {
  margin: 24px 0;
  padding: 18px 20px;
  background: var(--green-soft);
  border-left: 2px solid var(--secondary);
  animation: skill-copy 0.45s 0.22s both;
}
.skill-fact .eyebrow {
  color: var(--secondary);
  font-size: 10px;
}
.skill-fact p {
  font-size: 12px;
  line-height: 1.9;
  margin-top: 10px;
}
@keyframes skill-copy {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.skill-preset-picker {
  padding-bottom: 18px;
  margin-bottom: 4px;
  border-bottom: 1px dashed var(--line);
  display: grid;
  gap: 14px;
}
/* Arcade */
.arcade-banner {
  padding: 35px 0 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}
.arcade-banner .eyebrow {
  color: var(--green);
  font-size: 10px;
  letter-spacing: 3px;
}
.arcade-banner h2 {
  margin: 15px 0 12px;
  font-size: clamp(30px, 5vw, 54px);
  letter-spacing: -2px;
}
.arcade-banner p {
  color: var(--muted);
  font-size: 12px;
}
.arcade-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.arcade-card {
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  transition:
    border-color 0.2s,
    transform 0.2s;
}
.arcade-card:hover {
  border-color: var(--green);
  transform: translateY(-4px);
}
.arcade-card-art {
  height: 235px;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  background: radial-gradient(
    ellipse at center,
    var(--green-soft),
    var(--surface-solid)
  );
  border-bottom: 1px solid var(--line);
}
.arcade-card-art > span {
  position: absolute;
  bottom: 15px;
  left: 18px;
  font-size: 8px;
  letter-spacing: 2px;
  color: var(--muted);
}
.arcade-art {
  display: grid;
  gap: 5px;
  width: 138px;
  height: 138px;
  transform: rotate(-8deg);
  transition: transform 0.35s;
}
.arcade-card:hover .arcade-art {
  transform: rotate(0) scale(1.05);
}
.arcade-art i {
  display: grid;
  place-items: center;
  background: var(--game-empty);
  font-style: normal;
  border: 1px solid var(--line);
}
.arcade-merge,
.arcade-sudoku {
  grid-template-columns: repeat(3, 1fr);
}
.arcade-merge i {
  color: var(--green);
  font-size: 17px;
}
.arcade-merge i:nth-child(8) {
  background: var(--green);
  color: var(--bg);
  font-size: 12px;
  box-shadow: 0 0 18px color-mix(in srgb, var(--green) 20%, transparent);
}
.arcade-sudoku {
  transform: rotate(8deg);
  gap: 1px;
  border: 1px solid var(--green);
}
.arcade-sudoku i {
  color: var(--green);
  font-size: 22px;
  border: 0;
}
.arcade-tetris {
  grid-template-columns: repeat(6, 1fr);
  gap: 3px;
}
.arcade-tetris i {
  border-color: var(--line);
}
.arcade-card-body {
  padding: 24px;
}
.arcade-card-body h2 {
  font-size: 25px;
  color: var(--green);
}
.arcade-card-body p {
  font-size: 11px;
  line-height: 1.9;
  color: var(--muted);
  margin: 12px 0 25px;
  min-height: 83px;
}
.arcade-back {
  margin-bottom: 12px;
}
.game-switcher {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}
.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 560px) minmax(0, 340px);
  gap: clamp(25px, 6vw, 100px);
  align-items: start;
  justify-content: center;
}
.game-console {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 25px;
  min-width: 0;
}
.game-metrics {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  margin-bottom: 22px;
}
.game-metrics > div {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.game-metrics small {
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--muted);
}
.game-metrics strong {
  font-size: 25px;
  color: var(--green);
  font-weight: 500;
}
.game-guide {
  padding-top: 22px;
}
.game-guide .eyebrow {
  font-size: 9px;
  letter-spacing: 2px;
}
.game-guide h2 {
  font-size: 32px;
  line-height: 1.4;
  margin: 18px 0 24px;
}
.game-guide > p {
  color: var(--muted);
  line-height: 1.9;
  font-size: 12px;
}
.key-guide {
  display: grid;
  gap: 14px;
  padding: 24px 0;
  font-size: 11px;
}
.key-guide > span {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}
kbd {
  font: inherit;
  padding: 2px 7px;
  border: 1px solid var(--line);
  color: var(--green);
  background: var(--surface-solid);
  border-radius: 2px;
}
.game-note {
  margin: 25px 0 5px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.9;
}
.game-status {
  min-height: 43px;
  font-size: 10px;
  color: var(--green);
  line-height: 1.8;
  margin: 18px 0 15px;
}
.game-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.merge-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 9px;
  background: var(--surface-solid);
  padding: 9px;
  border: 1px solid var(--line);
  touch-action: none;
  user-select: none;
}
.merge-cell {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  background: var(--game-empty);
  border: 1px solid var(--line);
  font-size: clamp(18px, 3vw, 35px);
  font-weight: 600;
  color: var(--green);
}
.merge-cell:not([data-value="0"]) {
  background: color-mix(
    in srgb,
    var(--green) calc(var(--tile-level) * 7% + 7%),
    var(--game-empty)
  );
  border-color: color-mix(in srgb, var(--green) 40%, var(--line));
}
.merge-cell[data-high="true"] {
  color: var(--bg);
}
.merge-cell[data-value="2048"] {
  background: var(--green);
  box-shadow: 0 0 25px color-mix(in srgb, var(--green) 25%, transparent);
}
.merge-cell[data-value="1024"],
.merge-cell[data-value="2048"] {
  font-size: clamp(16px, 2.7vw, 30px);
}
.tile-pop {
  animation: tile-pop 0.17s ease-out;
}
@keyframes tile-pop {
  from {
    transform: scale(0.86);
    opacity: 0.55;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}
.direction-pad {
  display: grid;
  grid-template-columns: repeat(3, 48px);
  gap: 7px;
}
.direction-pad button,
.sudoku-keypad button,
.tetris-touch button {
  background: var(--green-soft);
  border: 1px solid var(--line);
  color: var(--green);
  min-height: 43px;
  font-size: 18px;
  border-radius: 2px;
}
.direction-pad button:hover,
.sudoku-keypad button:hover,
.tetris-touch button:hover {
  border-color: var(--green);
}
.direction-pad button:first-child {
  grid-column: 2;
}
.direction-pad button:nth-child(2) {
  grid-column: 1;
}
.direction-pad button:nth-child(3) {
  grid-column: 2;
}
.direction-pad button:nth-child(4) {
  grid-column: 3;
}
.game-select {
  display: grid;
  gap: 8px;
  font-size: 11px;
  color: var(--muted);
  margin: 5px 0 20px;
}
.game-select select {
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--surface-solid);
  color: var(--text);
  width: 100%;
}
.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  border: 2px solid var(--green);
  background: var(--line);
  gap: 1px;
}
.sudoku-cell {
  aspect-ratio: 1;
  background: var(--surface-solid);
  color: var(--green);
  padding: 0;
  border: 0;
  display: grid;
  place-items: center;
  font-size: clamp(17px, 2.6vw, 26px);
  min-width: 0;
  position: relative;
}
.sudoku-cell.given {
  color: var(--text);
  font-weight: 600;
}
.sudoku-cell.related {
  background: color-mix(in srgb, var(--green-soft) 60%, var(--surface-solid));
}
.sudoku-cell.same-value {
  background: var(--green-soft);
}
.sudoku-cell.selected {
  background: color-mix(in srgb, var(--green) 25%, var(--surface-solid));
  box-shadow: inset 0 0 0 2px var(--green);
}
.sudoku-cell.incorrect {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 15%, var(--surface-solid));
}
.sudoku-cell.box-right {
  border-right: 2px solid var(--green);
}
.sudoku-cell.box-bottom {
  border-bottom: 2px solid var(--green);
}
.cell-notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  position: absolute;
  inset: 3px;
  font-size: 9px;
  line-height: 1;
  color: var(--muted);
}
.cell-notes i {
  display: grid;
  place-items: center;
  font-style: normal;
}
.sudoku-keypad {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 5px;
  margin: 18px 0 14px;
}
.sudoku-keypad button {
  min-width: 0;
  font-size: 18px;
  padding: 0;
}
.sudoku-console .game-status {
  margin-bottom: 0;
}
.game-layout:has(.tetris-console) {
  grid-template-columns: minmax(0, 435px) minmax(0, 340px);
}
.tetris-stage {
  display: grid;
  grid-template-columns: minmax(0, 260px) 90px;
  gap: 18px;
  justify-content: center;
}
.tetris-playfield {
  position: relative;
  background: var(--surface-solid);
  border: 1px solid var(--line);
  touch-action: manipulation;
}
.tetris-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 1px;
}
.tetris-cell {
  aspect-ratio: 1;
  min-width: 0;
  background: color-mix(in srgb, var(--game-empty) 65%, transparent);
  border: 1px solid transparent;
}
.piece-I {
  background: #5bd9ee !important;
  border-color: #95edff !important;
}
.piece-O {
  background: #ebca63 !important;
  border-color: #ffe38b !important;
}
.piece-T {
  background: #b879e0 !important;
  border-color: #d6a3ff !important;
}
.piece-S {
  background: #61c98e !important;
  border-color: #92ecae !important;
}
.piece-Z {
  background: #e57984 !important;
  border-color: #ffacb3 !important;
}
.piece-J {
  background: #6495e5 !important;
  border-color: #97bbff !important;
}
.piece-L {
  background: #eaab68 !important;
  border-color: #ffd197 !important;
}
.tetris-cell[class*="piece-"]:not(.piece-ghost) {
  box-shadow:
    inset 2px 2px #ffffff18,
    inset -2px -2px #0002;
}
.piece-ghost {
  background: color-mix(in srgb, var(--green) 5%, transparent);
  border-color: color-mix(in srgb, var(--green) 60%, transparent);
}
.tetris-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 12px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  padding: 15px;
  text-align: center;
}
.tetris-overlay[hidden] {
  display: none;
}
.tetris-overlay strong {
  font-size: 24px;
  color: var(--green);
  letter-spacing: 2px;
  font-weight: 500;
}
.tetris-overlay span {
  font-size: 10px;
  color: var(--muted);
}
.tetris-side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding-top: 5px;
}
.tetris-side > small {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 1px;
}
.tetris-side > strong {
  color: var(--green);
  font-size: 20px;
}
.tetris-next {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: 84px;
  gap: 2px;
  margin: 6px 0 18px;
}
.tetris-next > span {
  aspect-ratio: 1;
  border: 1px solid transparent;
}
.tetris-side .game-actions {
  margin-top: auto;
  gap: 10px;
}
.tetris-side .game-actions .btn {
  width: 100%;
  font-size: 9px;
}
.tetris-touch {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) 1.5fr;
  gap: 6px;
  margin-top: 18px;
}
.tetris-touch button:last-child {
  font-size: 10px;
}
@media (max-width: 1080px) and (min-width: 861px) {
  .nav a {
    font-size: 9px;
    padding: 8px 6px;
  }
  .nav .count {
    display: none;
  }
  .terminal-links .owner-link {
    font-size: 8px;
  }
  .sidebar {
    gap: 10px;
  }
}
@media (max-width: 860px) {
  .topbar {
    gap: 10px;
  }
  .topbar-actions {
    gap: 7px;
  }
  .theme-trigger {
    font-size: 9px;
    padding: 4px 7px;
  }
  .breadcrumb .shell-prompt {
    display: none;
  }
  .sidebar .nav {
    background: var(--surface-solid);
  }
  .arcade-cards {
    gap: 15px;
  }
  .arcade-card-art {
    height: 185px;
  }
  .arcade-card-body {
    padding: 18px;
  }
  .arcade-card-body p {
    min-height: 125px;
  }
  .game-layout {
    grid-template-columns: minmax(0, 520px);
    gap: 15px;
  }
  .game-layout:has(.tetris-console) {
    grid-template-columns: minmax(0, 435px);
  }
  .game-guide {
    padding: 20px 10px;
  }
  .game-guide h2 {
    font-size: 26px;
  }
  .game-guide h2 br {
    display: none;
  }
  .game-guide .key-guide {
    padding-block: 20px;
  }
}
@media (max-width: 600px) {
  .arcade-cards {
    grid-template-columns: 1fr;
  }
  .arcade-card {
    display: grid;
    grid-template-columns: 125px minmax(0, 1fr);
  }
  .arcade-card-art {
    height: 100%;
    min-height: 230px;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .arcade-art {
    width: 85px;
    height: 85px;
    gap: 3px;
  }
  .arcade-merge i {
    font-size: 11px;
  }
  .arcade-merge i:nth-child(8) {
    font-size: 8px;
  }
  .arcade-sudoku i {
    font-size: 16px;
  }
  .arcade-card-art > span {
    bottom: 16px;
    left: 10px;
    width: 110px;
    line-height: 1.8;
    font-size: 7px;
  }
  .arcade-card-body {
    padding: 22px 18px;
  }
  .arcade-card-body h2 {
    font-size: 22px;
  }
  .arcade-card-body p {
    min-height: 0;
    margin-bottom: 18px;
    font-size: 10px;
  }
  .arcade-banner {
    padding: 20px 0 30px;
  }
  .arcade-banner h2 {
    font-size: 32px;
    letter-spacing: -1px;
  }
  .arcade-banner p {
    font-size: 10px;
  }
  .game-console {
    padding: 17px;
  }
  .game-metrics {
    gap: 9px;
  }
  .game-metrics strong {
    font-size: 22px;
  }
  .game-metrics small {
    font-size: 7px;
  }
  .game-switcher {
    margin-top: 14px;
  }
  .page-intro:has(.game-switcher) {
    flex-wrap: wrap;
  }
  .merge-board {
    gap: 6px;
    padding: 6px;
  }
  .merge-cell {
    font-size: 26px;
  }
  .merge-cell[data-value="1024"],
  .merge-cell[data-value="2048"] {
    font-size: 21px;
  }
  .sudoku-cell {
    font-size: 19px;
  }
  .cell-notes {
    font-size: 7px;
    inset: 2px;
  }
  .sudoku-keypad {
    gap: 3px;
  }
  .sudoku-keypad button {
    min-height: 38px;
    font-size: 15px;
  }
  .tetris-stage {
    grid-template-columns: minmax(0, 1fr) 78px;
    gap: 12px;
  }
  .tetris-next {
    width: 72px;
  }
  .tetris-overlay strong {
    font-size: 18px;
    letter-spacing: 1px;
  }
  .tetris-side .btn {
    padding: 6px 5px;
  }
  #theme-dialog,
  #skill-dialog {
    padding: 21px;
  }
  .theme-option-title {
    font-size: 12px;
  }
  .theme-options {
    gap: 10px;
  }
  .theme-option p {
    font-size: 9px;
    min-height: 60px;
  }
  .theme-preview {
    height: 75px;
  }
  .theme-option > small {
    font-size: 7px;
    letter-spacing: 0.5px;
  }
  #skill-title {
    font-size: 25px;
  }
  .skill-about {
    font-size: 12px;
  }
  .skill-button .skill-explore {
    font-size: 0;
  }
  .skill-button .skill-explore svg {
    width: 15px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* Keep the whole falling-block board in view on smaller desktop windows. */
@media (min-width: 861px) {
  main:has(.tetris-console) {
    padding-top: 20px;
  }
  .game-layout:has(.tetris-console) {
    grid-template-columns: minmax(0, 405px) minmax(0, 340px);
  }
  .tetris-stage {
    grid-template-columns: minmax(
        0,
        min(230px, max(160px, calc((100dvh - 440px) / 2)))
      ) 90px;
  }
}
.game-guide {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 24px;
}
.game-guide h2 {
  margin-top: 14px;
}
.stats .stat .stat-icon {
  background: var(--green-soft);
  color: var(--green);
}
.footer {
  color: var(--muted);
}
.project-art.terminal,
.terminal-window,
.search-input {
  background: var(--surface-solid);
  border-color: var(--line);
}
[data-theme="universe"] .project-art svg {
  filter: hue-rotate(110deg) saturate(0.7);
}
[data-theme="accelerator"] .project-art svg {
  filter: hue-rotate(55deg) saturate(0.8);
}
[data-theme="synthwave"] .project-art svg {
  filter: hue-rotate(190deg) saturate(0.8);
}