/* Sliding Puzzle — tokens from /assets/base.css */

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

body {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px 16px 32px;
  min-height: 100vh;
}

.app {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
}

.top {
  width: 100%;
  text-align: center;
  padding-left: 52px;
  padding-right: 8px;
}
.top h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel {
  width: 100%;
  background: linear-gradient(145deg, rgba(16, 20, 38, 0.95), #090c18 50%, #05060f 100%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 26px;
  padding: 22px 18px 18px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.hidden { display: none !important; }

.menu-panel { padding: 24px 22px 20px; gap: 16px; }
.menu-title {
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.menu-hint {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

/* --- Level grid --- */
.level-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}
.level-card {
  position: relative;
  aspect-ratio: 1 / 1;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
  padding: 0;
  font: inherit;
  color: var(--text);
}
.level-card:hover:not(:disabled) {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 0 18px rgba(138, 124, 255, 0.25);
}
.level-card:disabled { cursor: not-allowed; }
.level-card .thumb {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-color: #1a1c30;
  transition: filter 0.2s ease;
}
.level-card.locked .thumb {
  filter: blur(6px) brightness(0.4) grayscale(0.7);
}
.level-card .overlay-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 30%, rgba(0,0,0,0.78) 100%);
}
.level-card .lvl-num {
  position: absolute;
  top: 6px;
  left: 8px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(0, 0, 0, 0.55);
  border-radius: 6px;
  padding: 2px 7px;
}
.level-card .lvl-size {
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(0, 0, 0, 0.55);
  border-radius: 6px;
  padding: 2px 6px;
}
.level-card .lvl-info {
  position: absolute;
  bottom: 8px;
  left: 8px;
  right: 8px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.level-card .lvl-name {
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  text-shadow: 0 1px 4px rgba(0,0,0,0.7);
}
.level-card .lvl-best {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.7);
  font-variant-numeric: tabular-nums;
}
.level-card.locked .lvl-name,
.level-card.locked .lvl-best { display: none; }
.level-card .lock-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.55);
}
.level-card.locked .lock-icon svg { width: 28px; height: 28px; }
.level-card:not(.locked) .lock-icon { display: none; }
.level-card .check-icon {
  position: absolute;
  top: 6px;
  right: 8px;
  width: 18px;
  height: 18px;
  background: var(--accent);
  color: #0b0b12;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 11px;
}
.level-card:not(.cleared) .check-icon { display: none; }
.level-card.cleared .lvl-size { right: 32px; }

/* --- Game --- */
.game-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.game-header-left {
  display: flex;
  gap: 8px;
  align-items: center;
}
.level-tag {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
}
.level-size-tag {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.hud {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  width: 100%;
}
.hud-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 8px 6px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hud-label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hud-value {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* Board */
.board {
  position: relative;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1 / 1;
  background: #07090f;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 6px;
  touch-action: none;
}
.tile {
  position: absolute;
  background: linear-gradient(135deg, #1a1c30, #131426);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  color: var(--text);
  font-weight: 800;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.16s cubic-bezier(0.4, 0.0, 0.2, 1),
              background 0.18s ease,
              box-shadow 0.18s ease,
              filter 0.2s ease;
  user-select: none;
  background-repeat: no-repeat;
  overflow: hidden;
  color: transparent;
}
.tile:hover {
  box-shadow: 0 0 14px rgba(138, 124, 255, 0.18);
}
.tile .tile-num {
  position: absolute;
  bottom: 4px;
  right: 6px;
  font-size: 10px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(0, 0, 0, 0.55);
  border-radius: 4px;
  padding: 1px 5px;
  letter-spacing: 0.02em;
  pointer-events: none;
}
.tile.solved {
  filter: brightness(1.15) saturate(1.1);
  box-shadow: 0 0 16px rgba(138, 124, 255, 0.4);
  border-color: var(--accent);
}
/* When "peek" is on, show the empty slot ghost too (full image showing through) */
.board.peek::before {
  content: '';
  position: absolute;
  inset: 6px;
  background: var(--peek-bg, transparent);
  background-size: cover;
  background-position: center;
  border-radius: 10px;
  opacity: 0.18;
  pointer-events: none;
}

/* Buttons */
.primary-btn {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-pill);
  padding: 10px 22px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.12s ease, box-shadow 0.18s ease;
}
.primary-btn:hover {
  background: rgba(138, 124, 255, 0.25);
  transform: translateY(-1px);
  box-shadow: 0 0 18px rgba(138, 124, 255, 0.3);
}
.ghost-btn {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--text);
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.ghost-btn:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  color: var(--accent);
}
.ghost-btn[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.game-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.hint {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

/* Win overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 10, 22, 0.78);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
}
.overlay.hidden { display: none; }
.overlay-card {
  background: linear-gradient(145deg, #1a1c30, #0d0e1d);
  border: 1px solid rgba(138, 124, 255, 0.3);
  border-radius: 22px;
  padding: 28px 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  box-shadow: 0 0 40px rgba(138, 124, 255, 0.2);
  max-width: 340px;
}
.overlay-card h2 {
  font-size: 1.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}
.overlay-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.muted { color: var(--muted); font-size: 0.85rem; }

@media (max-width: 600px) {
  .panel { padding: 18px 14px 14px; border-radius: 22px; }
  .menu-panel { padding: 20px 14px 18px; }
  .level-grid { gap: 8px; }
  .level-card .lvl-num { font-size: 10px; }
  .level-card .lvl-name { font-size: 11px; }
}