/*
 * Main UI stylesheet.
 *
 * Contains global layout, theme tokens, component styling, and gameplay UI.
 * Win animation effects are intentionally split into `styles.winfx.css`.
 */

@import "tailwindcss";
@plugin "daisyui" {
  prefix: "dui-";
}

:root {
  color-scheme: dark;
  --font-ui: "Ubuntu", "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
  --font-emoji: "Segoe UI Emoji", "Noto Color Emoji", "Apple Color Emoji", "Segoe UI Symbol", sans-serif;
  --font-size-compact: 0.78rem;
  --font-size-control: 0.98rem;
  --font-weight-ui-medium: 500;
  --font-weight-ui-strong: 600;
  --font-weight-ui-title: 700;
  font-family: var(--font-ui);
  --animation-speed: var(--animation-speed-default, 1);
  --color-body-bg: linear-gradient(160deg, #1f2937, #111827);
  --color-body-text: #f9fafb;
  --font-display: "Russo One", "Segoe UI", "Arial Black", sans-serif;
  --color-app-bg: rgba(17, 24, 39, 0.92);
  --color-app-border: rgba(255, 255, 255, 0.2);
  --color-bar-bg: #000;
  --color-bar-border: rgba(255, 255, 255, 0.18);
  --color-title: #f8fafc;
  --color-status: #f8fafc;
  --color-warning: #fbbf24;
  --color-stat-bg: rgba(255, 255, 255, 0.12);
  --color-stat-border: rgba(255, 255, 255, 0.3);
  --color-stat-text: #f8fafc;
  --color-bottombar-stat-bg: rgba(255, 255, 255, 0.12);
  --color-bottombar-stat-border: rgba(255, 255, 255, 0.3);
  --color-bottombar-stat-text: #f8fafc;
  --color-btn-bg: linear-gradient(180deg, #f8fafc, #dbe4f0);
  --color-btn-bg-hover: linear-gradient(180deg, #fff, #e2e8f0);
  --color-btn-text: #0f172a;
  --color-btn-border: rgba(255, 255, 255, 0.25);
  --color-topbar-btn-border: rgba(255, 255, 255, 0.28);
  --color-btn-secondary-bg: linear-gradient(180deg, #3d4a5d, #2b3443);
  --color-btn-secondary-bg-hover: linear-gradient(180deg, #51627b, #39475c);
  --color-btn-secondary-text: #f8fafc;
  --color-board-border: rgba(255, 255, 255, 0.2);
  --color-board-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  --color-tile-border: rgba(255, 255, 255, 0.2);
  --color-tile-border-strong: rgba(148, 163, 184, 0.38);
  --color-tile-front-bg: linear-gradient(180deg, #334155, #1f2937);
  --color-tile-front-text: #e5e7eb;
  --color-tile-back-bg: linear-gradient(180deg, #f3f4f6, #d1d5db);
  --color-tile-back-text: #111827;
  --color-tile-side-left: #253243;
  --color-tile-side-bottom: #1a2432;
  --color-tile-edge-outline: rgba(226, 232, 240, 0.22);
  --color-menu-title: #f4e2b3;
  --color-menu-item: #d8b87a;
  --color-menu-item-hover: #f8ddb1;
  --color-repo: #cbd5e1;
  --color-repo-hover: #f8fafc;
  --color-divider: rgba(255, 255, 255, 0.45);
  --shadow-topbar-btn:
    inset 1px 1px 0 rgba(255, 255, 255, 0.18),
    inset -1px -1px 0 rgba(0, 0, 0, 0.55),
    0 1px 0 rgba(0, 0, 0, 0.4);
  --shadow-topbar-btn-active:
    inset -1px -1px 0 rgba(255, 255, 255, 0.12),
    inset 1px 1px 0 rgba(0, 0, 0, 0.55);
  --shadow-app-bar: none;
  --shadow-board:
    inset 1px 1px 0 rgba(255, 255, 255, 0.08),
    inset -1px -1px 0 rgba(0, 0, 0, 0.5);
  --shadow-tile:
    inset 1px 1px 0 rgba(255, 255, 255, 0.12),
    inset -2px -2px 0 rgba(0, 0, 0, 0.5),
    0 2px 6px rgba(0, 0, 0, 0.34);
  --shadow-tile-front:
    inset 1px 1px 0 rgba(255, 255, 255, 0.14),
    inset -2px -2px 0 rgba(0, 0, 0, 0.45);
  --shadow-text-physical: 0 2px 2px rgba(0, 0, 0, 0.38), 0 0 2px rgba(0, 0, 0, 0.28);
  --shadow-filter-physical: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.38)) drop-shadow(0 0 2px rgba(0, 0, 0, 0.28));
  --tile-front-size-cqw: 62cqw;
  --tile-back-size-cqw: 72cqw;
  --tile-global-opacity: 0.5;
  --tile-front-opacity: var(--tile-global-opacity, 0.5);
  --tile-back-opacity: var(--tile-global-opacity, 0.5);
  --tile-flip-duration-ms: 560ms;
  --tile-match-disappear-duration-ms: 500ms;
  --tile-match-disappear-reduced-duration-ms: 350ms;
  --plasma-bg-drift-duration-ms: 18000ms;
  --plasma-hue-cycle-duration-ms: 10800ms;
  --plasma-tile-drift-duration-ms: 90000ms;
  --plasma-glow-sweep-duration-ms: 12400ms;
  --plasma-flares-shift-duration-ms: 7600ms;
  --plasma-tile-index-offset-delay-ms: 6185ms;
  --plasma-glow-opacity: 0.7;
  --plasma-flares-opacity: 0.34;
}

[hidden] {
  display: none !important;
}

.u-shadow-physical {
  text-shadow: var(--shadow-text-physical);
}

svg.u-shadow-physical,
.settings-pack-icon.u-shadow-physical,
.tile-back.u-shadow-physical {
  filter: var(--shadow-filter-physical);
}

.settings-pack-btn[aria-checked="true"].u-shadow-physical,
.settings-pack-btn[aria-checked="true"] .u-shadow-physical,
.settings-pack-btn.active.u-shadow-physical,
.settings-pack-btn.active .u-shadow-physical,
.settings-apply-btn.u-shadow-physical {
  text-shadow: none;
  filter: none;
}

* {
  box-sizing: border-box;
}


body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  padding: 16px;
  background: var(--color-body-bg);
  color: var(--color-body-text);
  overflow-x: hidden;
}

.app-shell {
  --ui-scale: 1;
  --app-base-width: 1024;
  --app-base-height: 640;
  position: relative;
  margin: auto;
  min-width: 0;
  max-width: 100vw;
}

.app-shell[data-resize-ready="true"] {
  width: calc(var(--app-base-width) * 1px * var(--ui-scale));
  height: calc(var(--app-base-height) * 1px * var(--ui-scale));
}

.app {
  width: min(calc(var(--app-max-width-px, 979) * 1px), 100%);
  min-height: 100%;
  height: auto;
  position: relative;
  transform: none;
  transform-origin: top left;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--color-app-bg);
  border: 1px solid var(--color-app-border);
  border-radius: 14px;
  padding: 13px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.app-shell[data-resize-ready="true"] .app {
  width: calc(var(--app-base-width) * 1px);
  height: calc(var(--app-base-height) * 1px);
  transform: scale(var(--ui-scale));
  min-height: 0;
}

.app-topbar {
  margin: -13px -13px 12px;
  padding: 10px 14px;
  background: var(--color-bar-bg);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  position: relative;
  z-index: 100;
  overflow: visible;
  border-radius: 14px 14px 0 0;
  border-bottom: 1px solid var(--color-bar-border);
  box-shadow: var(--shadow-app-bar);
}

.app-topbar-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: var(--font-weight-ui-title);
  letter-spacing: 0.01em;
  color: var(--color-title);
}

.app-topbar .u-shadow-physical {
  text-shadow: 0 2px 2px rgba(0, 0, 0, 0.19), 0 0 2px rgba(0, 0, 0, 0.14);
}

.app-topbar svg.u-shadow-physical {
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.19)) drop-shadow(0 0 2px rgba(0, 0, 0, 0.14));
}

.status {
  margin: 0;
  min-height: 1.35rem;
  font-weight: var(--font-weight-ui-medium);
}

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

.topbar-status {
  color: var(--color-status);
  white-space: nowrap;
}

.stat {
  margin: 0;
  background: var(--color-stat-bg);
  border: 1px solid var(--color-stat-border);
  border-radius: 2px;
  padding: 6px 10px;
  color: var(--color-stat-text);
  font-size: 0.82rem;
  font-weight: var(--font-weight-ui-medium);
  box-shadow: none;
}

.topbar-actions {
  margin-left: auto;
  display: inline-flex;
  gap: 7px;
  min-width: 0;
  max-width: 100%;
  justify-content: flex-end;
  flex-wrap: wrap;
  overflow: visible;
}

.topbar-actions .btn {
  flex: 0 1 auto;
  white-space: nowrap;
  padding-inline: clamp(8px, 1.6vw, 13px);
  border-color: var(--color-topbar-btn-border);
  box-shadow: var(--shadow-topbar-btn);
}

.topbar-actions .btn:active {
  box-shadow: var(--shadow-topbar-btn-active);
}

.topbar-actions .btn-icon,
.topbar-actions .btn-icon-lg {
  width: 1.1em;
  height: 1.1em;
  font-size: 1em;
}

.topbar-actions .btn-icon-only {
  min-width: 38px;
  padding-inline: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.topbar-actions .btn-icon-only .btn-icon-lg {
  width: 1.3em;
  height: 1.3em;
  margin: 0;
}

.topbar-actions .btn-icon-only[aria-pressed="true"] {
  background: linear-gradient(180deg, #2b3443, #1f2937);
  opacity: 0.7;
}

#hdToggleButton[aria-pressed="true"] {
  background: linear-gradient(180deg, #2a6e3f, #1b4f2d);
  opacity: 1;
}

#hdToggleButton[aria-pressed="true"]:hover {
  background: linear-gradient(180deg, #348650, #226138);
}

.hd-toggle-icon {
  font-size: 0.72em;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.orientation-icon-svg {
  display: block;
  width: 100%;
  height: 100%;
}

.orientation-icon-svg[hidden] {
  display: none;
}

.debug-menu-root {
  position: relative;
  display: inline-flex;
  z-index: 55;
}

.debug-menu-root-bottom {
  align-items: center;
  margin-left: auto;
}

.debug-menu-button {
  font: inherit;
}

.debug-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 4px 8px;
  border: 1px solid color-mix(in srgb, var(--color-bar-border) 55%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-bar-bg) 28%, transparent);
  color: color-mix(in srgb, var(--color-status) 52%, transparent);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  text-transform: uppercase;
  opacity: 0.42;
  cursor: pointer;
  transition:
    opacity 140ms ease,
    color 140ms ease,
    border-color 140ms ease,
    background-color 140ms ease;
}

.debug-label .btn-icon {
  display: inline-flex;
  width: 0.9rem;
  height: 0.9rem;
}

.debug-label .btn-icon-svg {
  width: 100%;
  height: 100%;
}

.debug-label:hover,
.debug-label[aria-expanded="true"] {
  opacity: 0.68;
  color: color-mix(in srgb, var(--color-status) 72%, transparent);
  border-color: color-mix(in srgb, var(--color-bar-border) 78%, transparent);
  background: color-mix(in srgb, var(--color-bar-bg) 44%, transparent);
}

.debug-label:active {
  opacity: 0.82;
}

.debug-label:focus-visible {
  outline: 2px solid #93c5fd;
  outline-offset: 2px;
}

.debug-menu-panel {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  z-index: 999;
  min-width: 126px;
  padding: 4px;
  display: grid;
  gap: 2px;
  background: color-mix(in srgb, var(--color-bar-bg) 92%, white 8%);
  border: 1px solid var(--color-bar-border);
  border-radius: 8px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.28);
}

.debug-menu-panel[hidden] {
  display: none;
}

.debug-menu-item {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--color-status);
  font-size: var(--font-size-compact);
  font-weight: var(--font-weight-ui-strong);
  text-align: left;
  line-height: 1.2;
  padding: 6px 10px;
  cursor: pointer;
}

.debug-menu-item:hover {
  background: var(--color-stat-bg);
  border-color: var(--color-stat-border);
}

.debug-menu-item:active {
  background: color-mix(in srgb, var(--color-stat-bg) 84%, black 16%);
}

.debug-menu-item:focus-visible {
  outline: 2px solid #93c5fd;
  outline-offset: 1px;
}

.debug-menu-item:disabled,
.debug-menu-item:disabled:hover {
  opacity: 0.55;
  cursor: not-allowed;
  border-color: transparent;
  background: transparent;
}

#gameFrame,
#debugTilesFrame {
  position: relative;
  z-index: 1;
}

.game-canvas-win-fade-out {
  animation: game-canvas-fade-out calc(640ms / var(--animation-speed, 1)) ease-out forwards;
}

.app-bottombar {
  overflow: visible;
}

@supports not (color: color-mix(in srgb, black 50%, white 50%)) {
  .debug-menu-panel {
    background: var(--color-bar-bg);
  }

  .debug-menu-item:active {
    background: var(--color-stat-bg);
  }
}

.app-bottombar {
  margin: 12px -13px -13px;
  margin-top: auto;
  padding: 10px 36px 10px 14px;
  background: var(--color-bar-bg);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  position: relative;
  z-index: 100;
  border-radius: 0 0 14px 14px;
  border-top: 1px solid var(--color-bar-border);
  box-shadow: var(--shadow-app-bar);
}

.app-bottombar .stat {
  background: var(--color-bottombar-stat-bg);
  border-color: var(--color-bottombar-stat-border);
  color: var(--color-bottombar-stat-text);
}

.bottombar-status {
  color: var(--color-status);
  font-weight: 500;
  margin-left: 4px;
}

.bottombar-warning {
  color: var(--color-warning);
  font-weight: 600;
  margin-left: 4px;
}

.bottom-repo[hidden] + .bottombar-status:not([hidden]) {
  flex: 1;
  text-align: center;
}

.bottombar-stats {
  display: inline-flex;
  gap: 8px;
}

.bottombar-status:not([hidden]) + .bottombar-stats {
  padding-left: 16px;
  position: relative;
}

.bottombar-status:not([hidden]) + .bottombar-stats::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 24px;
  background: var(--color-divider);
}

.bottombar-status:not([hidden]) + .bottombar-warning:not([hidden]) + .bottombar-stats,
.bottombar-warning:not([hidden]) + .bottombar-stats {
  padding-left: 16px;
  position: relative;
}

.bottombar-status:not([hidden]) + .bottombar-warning:not([hidden]) + .bottombar-stats::before,
.bottombar-warning:not([hidden]) + .bottombar-stats::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 24px;
  background: var(--color-divider);
}

.bottombar-status[hidden] + .bottombar-stats {
  padding-left: 16px;
  position: relative;
}

.bottombar-status[hidden] + .bottombar-stats::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 24px;
  background: var(--color-divider);
}

.resize-handle {
  position: absolute;
  right: 6px;
  bottom: 7px;
  width: 16px;
  height: 16px;
  border-right: 1px solid var(--color-stat-border);
  border-bottom: 1px solid var(--color-stat-border);
  border-radius: 0 0 2px 0;
  opacity: 0.9;
  pointer-events: auto;
  cursor: nwse-resize;
  touch-action: none;
}

.resize-handle::before {
  content: "";
  position: absolute;
  right: 2px;
  bottom: 2px;
  width: 3px;
  height: 3px;
  border-right: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  box-shadow:
    -4px -4px 0 0 var(--color-divider),
    -8px -8px 0 0 var(--color-divider);
}

.btn {
  border: 1px solid var(--color-btn-border);
  border-radius: 10px;
  padding: 8px 13px;
  font-family: inherit;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  background: var(--color-btn-bg);
  color: var(--color-btn-text);
}

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

.btn:disabled,
.btn:disabled:hover {
  cursor: not-allowed;
  opacity: 0.55;
  filter: saturate(0.45);
}

.btn-secondary {
  background: var(--color-btn-secondary-bg);
  color: var(--color-btn-secondary-text);
}

.btn-secondary:hover {
  background: var(--color-btn-secondary-bg-hover);
  color: var(--color-btn-secondary-text);
}

.btn-icon {
  display: inline-grid;
  place-items: center;
  width: 1.1em;
  height: 1.1em;
  font-size: 1em;
  line-height: 1;
}

.btn-icon-svg {
  display: block;
  width: 100%;
  height: 100%;
}

.btn-icon-svg[hidden] {
  display: none;
}

.btn-icon-lg {
  width: 1.35em;
  height: 1.35em;
  font-size: 1.15em;
}

#gameFrame[hidden],
#menuFrame[hidden],
#leaderboardFrame[hidden],
#debugTilesFrame[hidden],
#settingsFrame[hidden] {
  display: none;
}

#menuFrame,
#leaderboardFrame,
#gameFrame,
#debugTilesFrame,
#settingsFrame {
  width: 100%;
  flex: 1 1 auto;
  min-height: 0;
}

#menuFrame,
#leaderboardFrame,
#settingsFrame {
  overflow-y: auto;
}

#leaderboardFrame {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#gameFrame,
#debugTilesFrame {
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

#debugTilesFrame {
  align-items: center;
}

.menu {
  min-height: 340px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 12px;
  padding: 6px 0;
  font-family: var(--font-display);
}

#menuFrame {
  --menu-pack-texture-image: none;
  --menu-pack-texture-size: 260px;
  --menu-pack-texture-position: center;
  position: relative;
  width: calc(100% + 26px);
  margin: -12px -13px 0;
  padding: 18px 13px 6px;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 50% 0%, rgba(143, 180, 255, 0.08), transparent 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0));
}

#menuFrame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--menu-pack-texture-image);
  background-position: var(--menu-pack-texture-position);
  background-repeat: no-repeat;
  background-size: var(--menu-pack-texture-size);
  opacity: 0.15;
  pointer-events: none;
  filter: saturate(0.85);
}

#menuFrame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 160 160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.1' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 180px 180px;
  opacity: 0.14;
  mix-blend-mode: soft-light;
  pointer-events: none;
  filter: blur(0.4px) contrast(180%);
}

#menuFrame > * {
  position: relative;
  z-index: 1;
}

.leaderboard-panel {
  width: min(920px, 97%);
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  padding: 12px 0;
}

.leaderboard-title {
  margin: 0;
  color: var(--color-menu-item);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.leaderboard-status {
  margin: 0;
  color: var(--color-menu-item-hover);
  font-size: 0.9rem;
}

.leaderboard-loader {
  height: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.leaderboard-loader[hidden] {
  display: none;
}

.leaderboard-loader-spinner {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 999px;
  border: 2px solid color-mix(in srgb, var(--color-menu-item-hover) 38%, transparent 62%);
  border-top-color: var(--color-menu-item-hover);
  animation: leaderboard-loader-spin calc(900ms / var(--animation-speed, 1)) linear infinite;
}

.leaderboard-table-wrap {
  width: min(920px, 98%);
  margin-top: 8px;
  flex: 1 1 0;
  min-height: 0;
  position: relative;
  isolation: isolate;
  overflow: auto;
  scrollbar-gutter: stable;
}

.leaderboard-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  color: var(--color-menu-item);
  font-size: 0.8rem;
  table-layout: fixed;
}

.leaderboard-table thead {
  position: sticky;
  top: -2px;
  z-index: 10;
  transform: translateZ(0);
  background: var(--color-bar-bg);
}

.leaderboard-table thead tr {
  background: var(--color-bar-bg);
}

.leaderboard-table thead th {
  position: relative;
  z-index: 1;
  background: transparent;
  background-clip: padding-box;
  color: var(--color-menu-item-hover);
  text-shadow: var(--shadow-text-physical);
  font-weight: var(--font-weight-ui-strong);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  box-shadow: inset 0 -1px 0 color-mix(in srgb, var(--color-divider) 70%, transparent 30%);
}

.leaderboard-table th,
.leaderboard-table td {
  padding: 6px 7px;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-bottom: 1px solid color-mix(in srgb, var(--color-divider) 70%, transparent 30%);
}

.leaderboard-cell-rank,
.leaderboard-table thead th:first-child {
  width: 5ch;
}

.leaderboard-cell-score,
.leaderboard-table thead th:nth-child(3) {
  width: 7ch;
}

.leaderboard-cell-player,
.leaderboard-table thead th:nth-child(2) {
  width: 38%;
}

.leaderboard-cell-difficulty,
.leaderboard-table thead th:nth-child(4) {
  width: 12ch;
}

.leaderboard-cell-tileset,
.leaderboard-table thead th:nth-child(5) {
  width: 18ch;
}

.leaderboard-row-recent {
  background: color-mix(in srgb, var(--color-menu-item-hover) 8%, transparent 92%);
}

.leaderboard-row-recent .leaderboard-cell {
  color: var(--color-title);
  text-shadow: var(--shadow-text-physical);
}

.leaderboard-back-btn {
  width: auto;
  min-width: 180px;
  margin-top: 12px;
  flex-shrink: 0;
  align-self: center;
  justify-content: center;
  padding-left: 28px;
  padding-right: 28px;
  text-shadow: var(--shadow-text-physical);
}

.name-prompt-overlay {
  position: absolute;
  inset: 0;
  z-index: 110;
  display: grid;
  place-items: center;
  padding: 12px;
  background: color-mix(in srgb, var(--color-app-bg) 95%, transparent 5%);
  opacity: 1;
  transition: opacity 220ms ease;
}

.name-prompt-overlay[hidden] {
  display: none;
}

.name-prompt-overlay.is-hiding {
  opacity: 0;
}

.name-prompt-toast {
  width: min(420px, 92%);
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--color-app-border);
  border-radius: 12px;
  background: var(--color-body-bg);
  box-shadow: var(--shadow-board);
}

.name-prompt-label {
  margin: 0;
  color: var(--color-menu-item);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: var(--font-weight-ui-strong);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
}

.name-prompt-input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-stat-border);
  border-radius: 8px;
  background: var(--color-stat-bg);
  color: var(--color-stat-text);
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: var(--font-weight-ui-medium);
}

.name-prompt-input:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--color-menu-item-hover) 70%, transparent 30%);
  outline-offset: 2px;
}

.name-prompt-ok-btn {
  width: 100%;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: var(--font-weight-ui-strong);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

@keyframes leaderboard-loader-spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.settings {
  min-height: 340px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 10px;
  padding: 6px 0;
}

.settings-title {
  margin: 0;
  color: var(--color-menu-title);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4.2vw, 2.15rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.settings-subtitle {
  margin: 0;
  color: var(--color-menu-item);
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.settings-pack-list {
  width: min(560px, 86%);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.settings-pack-btn {
  width: 100%;
  justify-content: flex-start;
  padding: 6px 10px;
  font-size: var(--font-size-compact);
  font-weight: var(--font-weight-ui-strong);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.settings-pack-icon {
  width: 1.25em;
  text-align: center;
  margin-right: 8px;
  font-family: var(--font-emoji), var(--font-ui);
}

.settings-pack-label {
  flex: 1;
  text-align: left;
}

.settings-pack-btn[aria-checked="true"],
.settings-pack-btn.active {
  background: var(--color-btn-bg-hover);
}

.settings-apply-btn {
  width: min(560px, 86%);
  justify-content: center;
  font-size: var(--font-size-control);
  font-weight: var(--font-weight-ui-strong);
  letter-spacing: 0.03em;
}

.settings-divider {
  display: block;
  width: min(560px, 86%);
  height: 1px;
  background: var(--color-divider);
}

.settings-slider-row {
  width: min(280px, 43%);
  display: grid;
  gap: 4px;
  justify-items: center;
}

.settings-slider-wrap {
  width: 100%;
  display: grid;
  gap: 4px;
}

.settings-slider {
  width: 100%;
  cursor: pointer;
  color: var(--color-menu-item-hover, #a0a8b8);
}

.settings-slider-ticks {
  display: flex;
  justify-content: space-between;
  color: var(--color-menu-item);
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  padding: 0 2px;
}

/* ── Plasma Surface: shared containment host for all plasma surface targets ── */
.plasma-surface {
  overflow: hidden;
  isolation: isolate;
  clip-path: inset(0);
}

.menu-title {
  margin: 0;
  font-size: clamp(1.8rem, 4.8vw, 2.45rem);
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-menu-title);
  font-family: var(--font-display);
  position: relative;
  -webkit-font-smoothing: antialiased;
}

.menu-list {
  width: min(420px, 94%);
  display: grid;
  gap: 4px;
}

.menu-item.btn {
  width: 100%;
  justify-content: center;
  padding: 6px 10px;
  font-size: clamp(1.26rem, 3.1vw, 1.78rem);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.1;
  text-transform: uppercase;
  font-family: inherit;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--color-menu-item);
}

.menu-item.btn:hover {
  background: transparent;
  color: var(--color-menu-item-hover);
  transform: translateY(-1px);
}

.menu-item.btn:disabled,
.menu-item.btn:disabled:hover {
  opacity: 1;
  filter: none;
}

.menu-item.btn.active {
  color: #fff2cc;
}

.menu-divider {
  width: 100%;
  height: 1px;
  margin: 4px 0;
  background: var(--color-divider);
}

.menu-title-divider {
  width: min(420px, 94%);
  margin: 6px 0 4px;
}

.bottom-repo {
  margin-top: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-right: 12px;
  margin-right: 2px;
  position: relative;
  color: var(--color-repo);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: var(--font-weight-ui-medium);
}

.bottom-repo::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 24px;
  background: var(--color-divider);
}

.bottom-repo:hover {
  color: var(--color-repo-hover);
}

.github-icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.board {
  margin-top: 11px;
  max-width: 100%;
  display: grid;
  gap: 10px;
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--color-board-border);
  background: var(--color-board-bg);
  align-items: stretch;
  overflow: hidden;
  perspective: 1800px;
  perspective-origin: 50% 120px;
  border-width: 2px;
  box-shadow: var(--shadow-board);
}

.board-debug-tiles {
  width: min(430px, 100%) !important;
  grid-template-columns: repeat(2, minmax(120px, 1fr)) !important;
  gap: 10px;
  padding: 8px;
}

.board-debug-tiles .tile {
  min-height: 120px;
}

.tile {
  --tile-camera-tilt: 0deg;
  --tile-rest-angle: 0deg;
  --tile-flip-angle: -180deg;
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 44px;
  border: 1px solid var(--color-tile-border);
  border-radius: 10px;
  cursor: pointer;
  padding: 0;
  font-size: clamp(1rem, 2vw, 1.45rem);
  background: transparent;
  container-type: size;
  transform-style: preserve-3d;
  transition: transform var(--tile-flip-duration-ms, 560ms) cubic-bezier(0.2, 0.7, 0.25, 1);
  transform: rotateX(var(--tile-camera-tilt)) rotateY(var(--tile-rest-angle));
  transform-origin: center center;
  opacity: 1;
  border-color: var(--color-tile-border-strong);
  box-shadow: var(--shadow-tile);
}

/*
 * Shared block-style skin for board tile buttons (`.tile game-block` in
 * `src/board.ts`) to render the classic pseudo-3D top/right faces.
 */
.game-block {
  border-radius: 0;
  border-color: var(--color-tile-edge-outline);
  box-shadow:
    inset 1px 1px 0 rgba(255, 255, 255, 0.32),
    inset -1px -1px 0 rgba(0, 0, 0, 0.14),
    1px 1px 0 rgba(0, 0, 0, 0.14);
}

.game-block::before,
.game-block::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.game-block::before {
  top: 1px;
  right: -4px;
  width: 4px;
  height: calc(100% - 1px);
  background: var(--color-tile-side-left);
  transform: skewY(-4deg);
  transform-origin: left top;
}

.game-block::after {
  top: -4px;
  left: 1px;
  width: calc(100% - 1px);
  height: 4px;
  background: var(--color-tile-side-bottom);
  transform: skewX(-4deg);
  transform-origin: left bottom;
}

.game-block .tile-face {
  border-radius: 0;
}

.game-block .tile-front {
  box-shadow:
    inset 1px 1px 0 rgba(255, 255, 255, 0.34),
    inset -1px -1px 0 rgba(0, 0, 0, 0.16);
}

.tile:not(.revealed):not(.matched):not(:disabled):hover {
  transform: rotateX(var(--tile-camera-tilt)) rotateY(var(--tile-rest-angle)) translateY(-1px) scale(1.005);
}

.tile.blocked {
  cursor: default;
  border-style: dashed;
  border-color: rgba(148, 163, 184, 0.5);
}

.tile.blocked .tile-front {
  background: linear-gradient(180deg, #1e293b, #0f172a);
  color: rgba(148, 163, 184, 0.75);
}

.tile.blocked .tile-back {
  display: none;
}

.tile:focus-visible,
.btn:focus-visible,
.bottom-repo:focus-visible {
  outline: 2px solid #93c5fd;
  outline-offset: 2px;
}

.tile-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 10px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.tile-front {
  background: var(--color-tile-front-bg);
  color: var(--color-tile-front-text);
  transform: rotateY(0deg);
  font-size: var(--tile-front-size-cqw);
  font-family: var(--font-ui);
  box-shadow: var(--shadow-tile-front);
}

/* Restore plasma texture when composable class is applied to tile front */
.tile-front.plasma-surface {
  background-color: #808080;
  background-image: url("./textures/plasma.png");
  background-size: 500%;
  background-position: 20% 20%;
  background-blend-mode: multiply;
  font-family: var(--font-display);
  color: color-mix(in srgb, var(--color-tile-front-text) 90%, transparent);
}

.tile-back {
  background: var(--color-tile-back-bg);
  color: var(--color-tile-back-text);
  transform: rotateY(180deg);
  font-size: clamp(1.2rem, var(--tile-back-size-cqw), 4.6rem);
  line-height: 1;
  font-family: var(--font-emoji), var(--font-ui);
  -webkit-text-stroke: 0.55px rgba(0, 0, 0, 0.38);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.32), 0 0 1px rgba(0, 0, 0, 0.18);
}

/* Plasma variant for tile back: white base with shared global plasma visibility, emoji fully opaque */
.tile-back.plasma-surface {
  background-color: #ffffff;
  background-image:
    linear-gradient(
      rgb(255 255 255 / calc(1 - var(--tile-back-opacity, var(--tile-global-opacity, 0.5)))),
      rgb(255 255 255 / calc(1 - var(--tile-back-opacity, var(--tile-global-opacity, 0.5))))
    ),
    url("./textures/plasma.png");
  background-size: 500%;
  background-position: 20% 20%;
  background-blend-mode: normal, multiply;
  color: var(--color-tile-back-text);
}

.tile-back .flag-emoji {
  width: 74%;
  height: 74%;
  object-fit: contain;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35)) drop-shadow(0 0 1px rgba(0, 0, 0, 0.2));
}

.tile-back .tile-asset-icon {
  width: 74%;
  height: 74%;
  object-fit: contain;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35)) drop-shadow(0 0 1px rgba(0, 0, 0, 0.2));
}

.tile-right,
.tile-top {
  display: none;
}

.tile.revealed,
.tile.matched {
  transform: rotateX(var(--tile-camera-tilt)) rotateY(var(--tile-flip-angle));
}

.tile.matched {
  cursor: default;
  pointer-events: none;
}

.tile.matched.matched-disappearing {
  --flip-angle-0: -180deg;
  --flip-angle-1: -180deg;
  --flip-angle-2: -180deg;
  --flip-angle-3: -180deg;
  animation: tile-dissolve-disappear calc(var(--tile-match-disappear-duration-ms, 500ms) / var(--animation-speed, 1)) ease forwards;
}

.tile.matched .tile-back {
  background: var(--color-tile-back-bg);
  color: var(--color-tile-back-text);
  text-shadow:
    0 0 10px rgb(74 222 128 / calc(0.72 + (var(--tile-back-opacity, var(--tile-global-opacity, 0.5)) * 0.28))),
    0 0 22px rgb(34 197 94 / calc(0.54 + (var(--tile-back-opacity, var(--tile-global-opacity, 0.5)) * 0.3)));
}

.tile.matched .tile-back .flag-emoji {
  filter:
    drop-shadow(0 0 7px rgb(74 222 128 / calc(0.72 + (var(--tile-back-opacity, var(--tile-global-opacity, 0.5)) * 0.28))))
    drop-shadow(0 0 15px rgb(34 197 94 / calc(0.54 + (var(--tile-back-opacity, var(--tile-global-opacity, 0.5)) * 0.3))));
}

.tile.matched .tile-back .tile-asset-icon {
  filter:
    drop-shadow(0 0 7px rgb(74 222 128 / calc(0.72 + (var(--tile-back-opacity, var(--tile-global-opacity, 0.5)) * 0.28))))
    drop-shadow(0 0 15px rgb(34 197 94 / calc(0.54 + (var(--tile-back-opacity, var(--tile-global-opacity, 0.5)) * 0.3))));
}

.tile.matched.matched-disappearing .tile-back {
  animation: tile-emoji-fade calc(var(--tile-match-disappear-duration-ms, 500ms) / var(--animation-speed, 1)) ease forwards;
  transform-origin: center;
  backface-visibility: visible;
  -webkit-backface-visibility: visible;
  will-change: transform, opacity;
}

.tile.matched .tile-front {
  opacity: 0;
}

.tile:disabled:not(.matched) {
  opacity: 1;
}

@keyframes tile-dissolve-disappear {
  0% {
    transform: rotateY(var(--flip-angle-0));
    opacity: 1;
    filter: blur(0) saturate(1);
  }

  100% {
    transform: rotateY(var(--flip-angle-3));
    opacity: 0;
    filter: blur(1px) saturate(0.85);
  }
}

@keyframes tile-emoji-fade {
  0% {
    opacity: 1;
    transform: rotateY(var(--flip-angle-0));
  }

  100% {
    opacity: 0;
    transform: rotateY(var(--flip-angle-3));
  }
}

@keyframes game-canvas-fade-out {
  from {
    opacity: 1;
    filter: saturate(1);
  }

  to {
    opacity: 0;
    filter: saturate(0.78);
  }
}

@media (prefers-reduced-motion: reduce) {
  .tile {
    transition: transform calc(360ms / var(--animation-speed, 1)) ease-out;
  }

  .tile:not(.revealed):not(.matched):not(:disabled):hover {
    transform: none;
  }

  .tile.matched {
    animation-duration: 0ms;
  }

  .tile.matched.matched-disappearing {
    animation-duration: calc(var(--tile-match-disappear-reduced-duration-ms, 350ms) / var(--animation-speed, 1));
  }

  .tile.matched.matched-disappearing .tile-back {
    animation-duration: calc(var(--tile-match-disappear-reduced-duration-ms, 350ms) / var(--animation-speed, 1));
  }

}

@media (max-width: 860px) {
  body {
    padding: 10px;
  }

  .app {
    padding: 10px;
  }

  .app-topbar {
    margin: -10px -10px 10px;
    border-radius: 14px 14px 0 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .app-bottombar {
    margin: 10px -10px -10px;
    padding: 10px 14px;
    border-radius: 0 0 14px 14px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .resize-handle {
    display: none;
  }

  .topbar-status {
    width: 100%;
    white-space: normal;
  }

  .topbar-actions {
    margin-left: auto;
    width: 100%;
    flex-wrap: nowrap;
    justify-content: flex-end;
    overflow-x: auto;
  }

  .bottombar-stats {
    margin-left: 0;
    width: 100%;
    flex-wrap: wrap;
  }

  .bottombar-status:not([hidden]) + .bottombar-stats {
    padding-left: 0;
  }

  .bottombar-status:not([hidden]) + .bottombar-stats::before {
    display: none;
  }

  .menu {
    min-height: 280px;
    gap: 10px;
  }

  .menu-list {
    width: 100%;
  }

  .menu-item.btn {
    font-size: clamp(1.08rem, 5.5vw, 1.4rem);
    letter-spacing: 0.04em;
  }

  .bottom-repo {
    font-size: 0.82rem;
  }

  .bottom-repo::after {
    display: none;
  }

  .board {
    gap: 6px;
    padding: 6px;
  }

  .stat {
    padding: 4px 7px;
    font-size: 0.85rem;
  }
}