:root {
  --bg: #f6f7f8;
  --panel: rgba(255, 255, 255, 0.92);
  --text: #111827;
  --muted: rgba(17, 24, 39, 0.62);

  --tile-size: 48px;
  --tile-gap: 5px;
  --key-height: 44px;
  --key-min-width: 38px;

  --tile: #ffffff;
  --tile-border: #d3d6da;

  --absent: #787c7e;
  --present: #c9b458;
  --correct: #6aaa64;

  --btn: #d3d6da;
  --btn-border: #d3d6da;
  --accent: rgba(34, 197, 94, 0.9);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica,
    Arial;
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    linear-gradient(
      to top,
      rgba(120, 124, 126, 0.92),
      rgba(120, 124, 126, 0.55) 35%,
      rgba(246, 247, 248, 0) 100%
    ),
    radial-gradient(900px 600px at 20% 0%, rgba(34, 197, 94, 0.09) 0%, rgba(246, 247, 248, 0) 70%),
    repeating-linear-gradient(
      to bottom,
      rgba(17, 24, 39, 0.035) 0px,
      rgba(17, 24, 39, 0.035) 1px,
      rgba(246, 247, 248, 0) 4px,
      rgba(246, 247, 248, 0) 9px
    ),
    repeating-linear-gradient(
      to right,
      rgba(17, 24, 39, 0.025) 0px,
      rgba(17, 24, 39, 0.025) 1px,
      rgba(246, 247, 248, 0) 28px,
      rgba(246, 247, 248, 0) 56px
    );
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  color: var(--text);
}

.header {
  padding: 24px 16px 8px;
  text-align: center;
}

.header-actions {
  margin-top: 12px;
  display: flex;
  justify-content: center;
  gap: 10px;
}

.header-actions:empty {
  display: none;
}

.title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.6px;
}

.subtitle {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
  padding-bottom: 86px;
}

.game-window {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(17, 24, 39, 0.16);
  box-shadow:
    0 18px 48px rgba(0, 0, 0, 0.18),
    0 1px 0 rgba(255, 255, 255, 0.60) inset;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.window-titlebar {
  height: 34px;
  display: grid;
  grid-template-columns: 92px 1fr 92px;
  align-items: center;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(17, 24, 39, 0.10);
}

.window-controls {
  display: flex;
  gap: 8px;
  min-height: 10px;
}

.window-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.10);
}

.window-dot.red { background: #ff5f57; }
.window-dot.yellow { background: #febc2e; }
.window-dot.green { background: #28c840; }

.window-dot-btn {
  padding: 0;
  border: 0;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.window-dot-btn:hover .window-dot.red {
  box-shadow: 0 0 0 3px rgba(255, 95, 87, 0.22);
}

.window-rules-btn {
  height: 22px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.10);
  background: #ff5f57;
  color: rgba(255, 255, 255, 0.96);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.6px;
  cursor: pointer;
  user-select: none;
}

.window-rules-btn:hover {
  filter: brightness(0.98);
}

.window-rules-btn:active {
  filter: brightness(0.96);
}

.modal.terminal-modal {
  padding: 0;
  overflow: hidden;
}

.terminal-titlebar {
  height: 34px;
  display: grid;
  grid-template-columns: 92px 1fr 92px;
  align-items: center;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(17, 24, 39, 0.10);
}

.terminal-controls {
  display: flex;
  gap: 8px;
  min-height: 10px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.10);
  display: inline-block;
}

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-dot-btn {
  padding: 0;
  border: 0;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.terminal-title {
  text-align: center;
  font-size: 12px;
  color: rgba(17, 24, 39, 0.70);
  letter-spacing: 0.2px;
  user-select: none;
}

.modal.terminal-modal .modal-body {
  margin-top: 0;
  padding: 14px;
}

.ai-window .window-content {
  padding: 10px 14px 12px;
}

.ai-window .ai-track-title {
  margin-bottom: 10px;
}

.ai-window .level-track {
  grid-template-columns: repeat(12, 1fr);
}

.window-title {
  text-align: center;
  font-size: 12px;
  color: rgba(17, 24, 39, 0.70);
  letter-spacing: 0.2px;
  user-select: none;
}

.window-spacer {
  width: 100%;
}

.window-content {
  position: relative;
  padding: 10px 12px 12px;
}

.notice-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(17, 24, 39, 0.10);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 180ms ease, visibility 0s linear 180ms;
}

.notice-overlay.show {
  opacity: 1;
  visibility: visible;
  transition: opacity 180ms ease;
}


.notice-window {
  width: min(420px, calc(100% - 24px));
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(17, 24, 39, 0.14);
  box-shadow: 0 20px 46px rgba(0, 0, 0, 0.22);
  pointer-events: none;
  opacity: 0;
  transform: translateY(8px) scale(0.985);
  transition: opacity 180ms ease, transform 180ms ease;
}

.notice-overlay.show .notice-window {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.notice-titlebar {
  height: 28px;
  display: grid;
  align-items: center;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(17, 24, 39, 0.10);
}

.notice-title {
  text-align: center;
  font-size: 11px;
  color: rgba(17, 24, 39, 0.68);
  letter-spacing: 0.2px;
  user-select: none;
}

.notice-content {
  padding: 10px 14px;
  text-align: center;
  min-height: 56px;
  display: grid;
  gap: 6px;
  place-items: center;
}

.notice-content .toast:empty {
  display: none;
}

.notice-content .toast {
  min-height: 0;
}

.ai-track {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid rgba(17, 24, 39, 0.10);
  border-radius: 14px;
  padding: 10px 12px;
}

.ai-track-title {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
  letter-spacing: 0.2px;
}

.panel {
  background: var(--panel);
  border: 1px solid rgba(17, 24, 39, 0.10);
  border-radius: 14px;
  padding: 12px;
}

.row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

label {
  color: var(--muted);
}

select {
  background: #ffffff;
  color: var(--text);
  border: 1px solid rgba(17, 24, 39, 0.16);
  padding: 8px 10px;
  border-radius: 10px;
  outline: none;
}

.btn {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid rgba(17, 24, 39, 0.16);
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.02),
    0 0 0 2px rgba(34, 197, 94, 0) inset;
}

.btn.secondary {
  opacity: 0.9;
}

.btn:hover {
  filter: brightness(1.01);
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.02),
    0 0 0 2px rgba(34, 197, 94, 0.18) inset;
}

.meta {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.board {
  display: grid;
  justify-content: center;
  gap: var(--tile-gap);
  padding: 8px 0 10px;
}

.board-row {
  display: grid;
  gap: var(--tile-gap);
}

.tile {
  width: var(--tile-size);
  height: var(--tile-size);
  border-radius: 12px;
  background: var(--tile);
  border: 2px solid var(--tile-border);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 20px;
  text-transform: uppercase;
  user-select: none;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease,
    transform 180ms ease;
}

.tile.filled {
  border-color: #878a8c;
}

.tile.absent {
  background: var(--absent);
  border-color: var(--absent);
  color: #ffffff;
}

.tile.present {
  background: var(--present);
  border-color: var(--present);
  color: #ffffff;
}

.tile.correct {
  background: var(--correct);
  border-color: var(--correct);
  color: #ffffff;
}

.keyboard {
  display: grid;
  gap: 8px;
  justify-content: center;
  padding-bottom: 2px;
}

.kb-row {
  display: flex;
  gap: 6px;
  justify-content: center;
}

.key {
  min-width: var(--key-min-width);
  height: var(--key-height);
  padding: 0 10px;
  border-radius: 10px;
  border: 1px solid var(--btn-border);
  background: var(--btn);
  color: var(--text);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease,
    transform 180ms ease;
}

.key.wide {
  min-width: 78px;
}

.key.absent {
  background: var(--absent);
  border-color: var(--absent);
  color: #ffffff;
}

.key.present {
  background: var(--present);
  border-color: var(--present);
  color: #ffffff;
}

.key.correct {
  background: var(--correct);
  border-color: var(--correct);
  color: #ffffff;
}

.toast {
  min-height: 22px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.cooldown {
  min-height: 18px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

.level-track-wrap {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 12px;
  background: transparent;
  pointer-events: auto;
  z-index: 40;
}

.level-track {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  align-items: center;
}

.ai-track .level-track {
  max-width: 100%;
}

.ai-track .level-dot {
  width: 12px;
  height: 12px;
}

.ai-track .level-dot.done {
  border-color: rgba(239, 68, 68, 0.85);
  background: rgba(239, 68, 68, 0.85);
}

.ai-track .level-node.done::before {
  background: rgba(239, 68, 68, 0.34);
}

.level-node {
  position: relative;
  height: 28px;
  display: grid;
  place-items: center;
}

.level-node::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 3px;
  transform: translateY(-50%);
  background: rgba(17, 24, 39, 0.14);
}

.level-node:first-child::before {
  left: 50%;
}

.level-node:last-child::before {
  right: 50%;
}

.level-dot {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 2px solid rgba(17, 24, 39, 0.22);
  background: #ffffff;
  cursor: pointer;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 180ms ease, visibility 0s linear 180ms;
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 180ms ease;
}

.modal {
  width: min(560px, 100%);
  background: var(--panel);
  border: 1px solid rgba(17, 24, 39, 0.14);
  border-radius: 14px;
  padding: 14px;
  transform: translateY(10px) scale(0.99);
  transition: transform 180ms ease;
}

.modal-backdrop.open .modal {
  transform: translateY(0) scale(1);
}

.modal.modal-small {
  width: min(440px, 100%);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.modal-title {
  font-weight: 800;
}

.modal-close {
  min-width: auto;
  height: 36px;
  padding: 0 10px;
}

.modal-body {
  margin-top: 10px;
  color: var(--muted);
  min-height: 80px;
}

.terminal-modal .modal-title {
  color: var(--text);
  font-size: 26px;
  margin-bottom: 6px;
}

.terminal-modal #resultBody {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.45;
}

.modal-actions {
  margin-top: 12px;
  display: flex;
  justify-content: flex-end;
}

.terminal-modal .modal-actions {
  padding: 0 14px 14px;
  margin-top: 0;
}

.level-dot.done {
  border-color: var(--correct);
  background: var(--correct);
}

.level-dot.current {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.18);
}

.level-dot.locked {
  cursor: not-allowed;
  opacity: 0.35;
}

.level-node.done::before {
  background: rgba(106, 170, 100, 0.55);
}

button.btn:focus-visible,
button.key:focus-visible,
button.level-dot:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.22);
}