/* ---- Layout ---- */
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.page-head h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 700;
  font-size: clamp(28px, 4.4vw, 40px);
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.05;
}
.page-head .sub {
  color: var(--ink-soft);
  margin: 6px 0 0;
  font-size: 14px;
  min-height: 1.4em;
}
.head-actions { display: flex; gap: 8px; }

/* The play surface */
.play {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  /* Card geometry: width scales with viewport but capped */
  --card-w: clamp(54px, 8.5vw, 86px);
  --card-h: calc(var(--card-w) * 1.4);
  --card-radius: 8px;
  --stack-step: calc(var(--card-h) * 0.22); /* offset between stacked face-up cards */
  --stack-step-down: calc(var(--card-h) * 0.13); /* offset for face-down cards */
}

/* Top row holds stock, waste, gap, four foundations */
.top-row-wrap, .tableau-wrap {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  margin: 0 -18px;
  padding: 0 18px;
}
.top-row-wrap::-webkit-scrollbar, .tableau-wrap::-webkit-scrollbar { height: 6px; }
.top-row-wrap::-webkit-scrollbar-thumb, .tableau-wrap::-webkit-scrollbar-thumb {
  background: var(--line); border-radius: 999px;
}
.top-row {
  display: grid;
  grid-template-columns: repeat(7, var(--card-w));
  gap: clamp(6px, 1.2vw, 16px);
  min-width: max-content;
  margin-bottom: 22px;
  padding-bottom: 6px;
}
.top-gap { background: transparent; }

/* Tableau columns */
.tableau {
  display: grid;
  grid-template-columns: repeat(7, var(--card-w));
  gap: clamp(6px, 1.2vw, 16px);
  min-width: max-content;
  min-height: calc(var(--card-h) + var(--stack-step) * 18);
  padding-bottom: 6px;
}
.col {
  position: relative;
  width: var(--card-w);
  /* Allow the column to grow with cards; the parent reserves space */
  min-height: var(--card-h);
}

/* ---- Piles (empty pile slots) ---- */
.pile {
  width: var(--card-w);
  height: var(--card-h);
  border: 2px dashed #cdbf9f;
  border-radius: var(--card-radius);
  background: rgba(214, 200, 168, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease;
}
.pile.is-drop-target {
  border-color: var(--accent);
  background: rgba(244, 227, 178, 0.5);
}
.pile-glyph {
  font-family: 'Fraunces', Georgia, serif;
  font-size: calc(var(--card-w) * 0.55);
  color: rgba(28, 42, 58, 0.18);
  user-select: none;
}

/* The stock has its own back-card look when not empty */
.stock.has-cards { background: transparent; border: none; }
.stock .stock-back {
  position: absolute;
  inset: 0;
  border-radius: var(--card-radius);
  background:
    repeating-linear-gradient(45deg,
      #1f3a5f 0,
      #1f3a5f 6px,
      #2d5a8c 6px,
      #2d5a8c 12px);
  border: 1.5px solid #14253d;
  box-shadow:
    inset 0 0 0 3px var(--paper),
    inset 0 0 0 4.5px #14253d,
    0 1px 0 rgba(0,0,0,0.08),
    0 6px 14px -10px rgba(31,58,95,0.5);
  cursor: pointer;
}
.stock .stock-count {
  position: absolute;
  bottom: 6px;
  right: 8px;
  font: 700 11px 'Inter', sans-serif;
  color: var(--paper);
  background: rgba(20, 37, 61, 0.85);
  padding: 2px 7px;
  border-radius: 999px;
  pointer-events: none;
}
.stock.is-empty-recycle::before {
  content: '↻';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--card-w) * 0.55);
  color: rgba(28, 42, 58, 0.35);
  pointer-events: none;
}

/* ---- Cards ---- */
.card {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--card-w);
  height: var(--card-h);
  background: var(--paper);
  border: 1.5px solid #14253d;
  border-radius: var(--card-radius);
  box-shadow:
    0 1px 0 rgba(0,0,0,0.05),
    0 4px 10px -6px rgba(31,58,95,0.4);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 6px 7px;
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  transition: transform 140ms ease, box-shadow 180ms ease;
  /* Cards in the same column share absolute positioning; we offset via top. */
}
.card.face-down {
  background:
    repeating-linear-gradient(45deg,
      #1f3a5f 0,
      #1f3a5f 6px,
      #2d5a8c 6px,
      #2d5a8c 12px);
  box-shadow:
    inset 0 0 0 3px var(--paper),
    inset 0 0 0 4.5px #14253d,
    0 1px 0 rgba(0,0,0,0.05),
    0 4px 10px -6px rgba(31,58,95,0.4);
  cursor: pointer;
}
.card.face-down .face-content { display: none; }

.card .face-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  width: 100%;
}
.card .rank-row {
  display: flex;
  align-items: center;
  gap: 2px;
  line-height: 1;
}
.card .rank {
  font-size: calc(var(--card-w) * 0.28);
  letter-spacing: -0.02em;
}
.card .suit {
  font-size: calc(var(--card-w) * 0.26);
  line-height: 1;
}
.card .rank-row.bottom {
  transform: rotate(180deg);
  align-self: flex-end;
}
.card .big-suit {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--card-w) * 0.7);
  line-height: 1;
  margin: 0;
}
.card[data-color="red"] { color: var(--danger); }
.card[data-color="black"] { color: var(--ink); }

.card.is-selected {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  transform: translateY(-3px);
  box-shadow:
    0 1px 0 rgba(0,0,0,0.05),
    0 12px 22px -8px rgba(31,58,95,0.75);
  animation: sol-selected-glow 1400ms ease-in-out infinite alternate;
}
@keyframes sol-selected-glow {
  from { box-shadow: 0 1px 0 rgba(0,0,0,0.05), 0 12px 22px -8px rgba(31,58,95,0.75); }
  to   { box-shadow: 0 1px 0 rgba(0,0,0,0.05), 0 12px 22px -8px rgba(31,58,95,0.75), 0 0 0 2px rgba(31,58,95,0.35); }
}

/* Face-down flip reveal — when tableau reveals a top card */
@keyframes sol-flip-reveal {
  0%   { transform: rotateY(180deg); }
  100% { transform: rotateY(0deg); }
}
.card.just-revealed {
  animation: sol-flip-reveal 260ms ease-out;
  transform-style: preserve-3d;
}

@media (prefers-reduced-motion: reduce) {
  .card.is-selected, .card.just-revealed { animation: none; }
  .card.is-selected { transform: none; }
}
.card.is-hint {
  animation: hint-pulse 700ms ease-in-out;
}
@keyframes hint-pulse {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}
.card:hover:not(.face-down):not(.is-buried) { transform: translateY(-2px); }
.card.is-buried { cursor: default; }

/* ---- Win overlay ---- */
.win-overlay {
  position: fixed;
  inset: 0;
  background: rgba(28, 42, 58, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}
.win-overlay[hidden] { display: none; }
.win-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 30px;
  text-align: center;
  box-shadow: var(--shadow-lift);
  max-width: 360px;
}
.win-card h2 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 700;
  font-size: 30px;
  margin: 0 0 6px;
}
.win-card p { color: var(--ink-soft); margin: 0 0 18px; }

/* Help block */
.aside-info {
  margin-top: 22px;
}
.aside-info details {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: var(--shadow);
}
.aside-info summary {
  cursor: pointer;
  font: 700 14px 'Inter', sans-serif;
  color: var(--ink);
}
.aside-info .help-body {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
}
.aside-info .help-body p { margin: 0 0 8px; }
.aside-info .help-body ul {
  margin: 0;
  padding-left: 18px;
}
.aside-info .help-body li { margin: 4px 0; }

/* ---- Responsive tweaks ---- */
@media (max-width: 760px) {
  .play {
    padding: 12px;
    --card-w: clamp(40px, 12.2vw, 64px);
  }
  .top-row, .tableau { gap: 6px; }
  .card { padding: 4px 5px; }
}
@media (max-width: 460px) {
  .play {
    --card-w: clamp(34px, 12.6vw, 50px);
    --stack-step: calc(var(--card-h) * 0.24);
  }
  .head-actions .btn { padding: 9px 11px; font-size: 13px; }
}