@font-face {
  font-family: "Geist";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("https://cubesolver.ai/_next/static/media/4cf2300e9c8272f7-s.p.woff2")
    format("woff2");
}

:root {
  --background: #ffffff;
  --foreground: #171717;
  --brand-primary: #ff6b00;
  --brand-primary-dark: #e85800;
  --brand-secondary: #111317;
  --surface: #ffffff;
  --surface-muted: #f4f3ef;
  --panel-surface: rgba(255, 255, 255, 0.96);
  --panel-strong: rgba(255, 255, 255, 0.98);
  --border-color: rgba(17, 19, 23, 0.08);
  --text-primary: #1f1f1f;
  --text-muted: #666666;
  --text-inverse: #f5f7fb;
  --glow: 0 25px 60px rgba(17, 19, 23, 0.15);
  --glow-soft: 0 12px 30px rgba(17, 19, 23, 0.12);
}

html[data-host-theme="classic"] {
  --background: #070c12;
  --foreground: #e8eef6;
  --brand-primary: #8ad3ff;
  --brand-primary-dark: #55bcff;
  --brand-secondary: #1b2a3e;
  --surface: #0f1722;
  --surface-muted: #101a26;
  --panel-surface: rgba(14, 22, 33, 0.82);
  --panel-strong: rgba(14, 22, 33, 0.95);
  --border-color: rgba(255, 255, 255, 0.14);
  --text-primary: #e8eef6;
  --text-muted: #9bb0c9;
  --text-inverse: #e8eef6;
  --glow: 0 18px 42px rgba(4, 10, 18, 0.44);
  --glow-soft: 0 12px 24px rgba(4, 10, 18, 0.34);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Geist, system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text-primary);
  background:
    radial-gradient(circle at 12% 16%, rgba(255, 119, 26, 0.08), transparent 36%),
    radial-gradient(circle at 80% 8%, rgba(17, 19, 23, 0.06), transparent 42%),
    linear-gradient(160deg, #fafaf8 0%, var(--surface-muted) 100%);
}

html[data-host-theme="classic"] body {
  background:
    radial-gradient(circle at 16% 18%, #20344c 0%, transparent 32%),
    radial-gradient(circle at 80% 9%, #1b2a3f 0%, transparent 35%),
    linear-gradient(160deg, #111a26, #070c12);
}

button,
input,
textarea,
select {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  padding: 16px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
}

.topbar {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: var(--panel-surface);
  box-shadow: var(--glow);
}

.brand-logo {
  flex: 1 1 auto;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.logo-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: radial-gradient(circle at 34% 32%, #ffd08a 0%, var(--brand-primary) 58%, var(--brand-primary-dark) 100%);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--brand-primary) 24%, #ffffff 76%);
}

.logo-stack {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.logo-text {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-primary);
}

.topbar-actions {
  flex: 0 0 auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.size-select-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.size-select-wrap::after {
  content: "";
  position: absolute;
  right: 10px;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid color-mix(in srgb, var(--text-primary) 76%, transparent);
  border-bottom: 1.5px solid color-mix(in srgb, var(--text-primary) 76%, transparent);
  transform: translateY(-2px) rotate(45deg);
  pointer-events: none;
}

.size-select {
  appearance: none;
  min-width: 84px;
  max-width: 96px;
  border: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--border-color) 86%, transparent);
  border-radius: 0;
  background: transparent;
  color: var(--text-primary);
  padding: 4px 24px 4px 4px;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
}

.size-select:focus {
  outline: none;
  border-bottom-color: color-mix(in srgb, var(--brand-primary) 70%, transparent);
}

.size-select:hover {
  border-bottom-color: color-mix(in srgb, var(--brand-primary) 42%, var(--border-color) 58%);
}

button {
  border: 1px solid var(--border-color);
  background: color-mix(in srgb, var(--surface) 82%, #e9ecf2 18%);
  color: var(--text-primary);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.84rem;
  transition:
    border-color 140ms ease,
    background 140ms ease,
    transform 140ms ease,
    box-shadow 140ms ease;
}

button:hover {
  border-color: color-mix(in srgb, var(--brand-primary) 46%, var(--border-color) 54%);
  background: color-mix(in srgb, var(--brand-primary) 12%, var(--surface) 88%);
}

button:active {
  transform: translateY(1px);
}

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

.btn-primary {
  border-color: color-mix(in srgb, var(--brand-primary) 72%, transparent);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--brand-primary) 90%, #ffffff 10%),
    color-mix(in srgb, var(--brand-primary-dark) 88%, #ffffff 12%)
  );
  color: #fff7f0;
  box-shadow: 0 10px 22px rgba(255, 107, 0, 0.2);
}

.btn-primary:hover {
  border-color: color-mix(in srgb, var(--brand-primary-dark) 78%, transparent);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--brand-primary) 96%, #ffffff 4%),
    color-mix(in srgb, var(--brand-primary-dark) 94%, #ffffff 6%)
  );
}

.stage-layout {
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr minmax(300px, 380px);
  gap: 14px;
  align-items: start;
}

.canvas-wrap {
  position: relative;
  height: calc(100dvh - 132px);
  min-height: 520px;
  border-radius: 18px;
  border: 1px solid var(--border-color);
  background:
    radial-gradient(circle at 22% 18%, rgba(255, 255, 255, 0.95), rgba(249, 250, 251, 0.88) 35%, transparent 66%),
    radial-gradient(circle at 84% 72%, rgba(198, 205, 218, 0.5), transparent 44%),
    linear-gradient(186deg, #f6f7fa 0%, #e7ebf2 72%, #dde2eb 100%);
  box-shadow: var(--glow);
  overflow: hidden;
}

#cube-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.quality-btn.is-active {
  border-color: var(--brand-primary);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--brand-primary) 18%, #ffffff 82%),
    color-mix(in srgb, var(--brand-primary) 8%, #ffffff 92%)
  );
}

.stage-display-buttons {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 4;
}

.stage-display-buttons .quality-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.stage-display-buttons .quality-btn {
  min-width: 68px;
  min-height: 28px;
  padding: 3px 8px;
  font-size: 0.72rem;
  background: color-mix(in srgb, var(--panel-strong) 82%, transparent);
  backdrop-filter: blur(8px);
}

.stage-speed-inline {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  z-index: 4;
  width: min(340px, calc(100% - 182px));
}

.stage-speed-inline input[type="range"] {
  display: block;
  width: 100%;
}

.stage-paint-palette {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  z-index: 4;
  display: none;
}

.stage-paint-palette.is-open {
  display: block;
}

.palette-grid.palette-grid-vertical {
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 0;
}

.palette-grid.palette-grid-vertical .color-dot {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  padding: 0;
}

.status-pill {
  position: absolute;
  left: 12px;
  bottom: 18px;
  max-width: min(240px, calc(100% - 182px));
  font-size: 0.68rem;
  color: color-mix(in srgb, var(--text-primary) 68%, transparent);
  padding: 0;
  z-index: 3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.metrics-debug-panel {
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 9999;
  margin: 0;
  padding: 8px 10px;
  border: 1px solid color-mix(in srgb, var(--brand-primary) 38%, var(--border-color) 62%);
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 88%, #000000 12%);
  color: var(--text-primary);
  font: 12px/1.35 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
  pointer-events: none;
  white-space: pre;
}

.control-panel {
  min-height: 0;
  overflow: auto;
  border: 1px solid var(--border-color);
  border-radius: 18px;
  background: var(--panel-surface);
  padding: 12px;
  box-shadow: var(--glow);
}

.panel-block {
  border: 1px solid color-mix(in srgb, var(--border-color) 72%, transparent);
  border-radius: 14px;
  background: color-mix(in srgb, var(--surface) 92%, #eef2f8 8%);
  padding: 12px;
}

.panel-block + .panel-block {
  margin-top: 12px;
}

.panel-drawer-head h2,
.stage-panel h2 {
  margin: 0;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
}

.panel-copy {
  margin: 8px 0 0;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--text-primary);
}

.panel-drawer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.panel-close-btn {
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.76rem;
}

.quick-actions-grid,
.action-row,
.quality-row,
.size-switch-panel {
  display: grid;
  gap: 8px;
}

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

.quick-actions-grid button {
  min-height: 42px;
}

.action-row.playback-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.action-row-steps {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel-block-primary {
  padding: 10px;
}

.panel-block-solution {
  display: grid;
  gap: 10px;
}

.slider-row {
  display: grid;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--brand-primary);
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  margin-top: 8px;
}

.color-dot {
  height: 38px;
  border-radius: 12px;
  border: 2px solid var(--border-color);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.color-dot.is-active {
  outline: 2px solid var(--brand-primary);
  outline-offset: 1px;
}

.hint {
  margin: 6px 0 0;
  font-size: 0.74rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.solution-output {
  min-height: 90px;
  margin-top: 10px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  padding: 10px;
  font-size: 0.8rem;
  color: var(--text-primary);
  line-height: 1.45;
  background: color-mix(in srgb, var(--surface-muted) 58%, #ffffff 42%);
  word-break: break-word;
}

.solution-message {
  margin-bottom: 8px;
  font-size: 0.74rem;
  color: var(--text-muted);
}

.solution-empty {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.solution-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.solution-token {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3px 8px;
  background: #ffffff;
  color: var(--text-primary);
}

.solution-token.is-active {
  border-color: #e53935;
  background: #ffe6e6;
  color: #b30000;
}

.manual-moves-head {
  display: grid;
  gap: 4px;
  margin-top: 12px;
}

.manual-moves-head h3 {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: var(--text-primary);
}

.move-grid {
  display: grid;
  gap: 6px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin-top: 10px;
}

.move-btn {
  padding: 8px 4px;
  font-size: 0.78rem;
}

@media (max-width: 1024px) {
  .stage-layout {
    grid-template-columns: 1fr;
  }

  .canvas-wrap {
    height: clamp(420px, 62vh, 620px);
    min-height: 420px;
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding: 10px;
    gap: 10px;
  }

  .topbar {
    padding: 10px 12px;
    border-radius: 12px;
    gap: 8px;
  }

  .topbar-actions {
    margin-left: 6px;
  }

  .size-select {
    min-width: 70px;
    max-width: 78px;
    padding-right: 20px;
    font-size: 0.8rem;
  }

  .logo-text {
    font-size: 0.98rem;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .stage-layout {
    gap: 10px;
  }

  .canvas-wrap {
    position: sticky;
    top: 0;
    z-index: 20;
    height: clamp(340px, 56vh, 460px);
    min-height: 340px;
    border-radius: 14px;
  }

  .stage-display-buttons {
    top: 10px;
    left: 10px;
  }

  .stage-display-buttons .quality-row {
    gap: 6px;
  }

  .stage-display-buttons .quality-btn {
    min-width: 60px;
    min-height: 26px;
    padding: 2px 6px;
    font-size: 0.68rem;
  }

  .stage-speed-inline {
    width: min(260px, calc(100% - 132px));
    left: 50%;
    right: auto;
    bottom: 10px;
    transform: translateX(-50%);
  }

  .stage-paint-palette {
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
  }

  .status-pill {
    left: 50%;
    bottom: 2px;
    right: auto;
    transform: translateX(-50%);
    max-width: calc(100% - 36px);
    font-size: 0.62rem;
    text-align: center;
  }

  .control-panel {
    border-radius: 14px;
    padding: 10px;
    overflow: visible;
  }

  .panel-block {
    border-radius: 12px;
    padding: 10px;
  }

  .quick-actions-grid button {
    min-height: 42px;
    padding-inline: 8px;
    font-size: 0.8rem;
  }

  .action-row-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .palette-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .move-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}