*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #1a6b30;
  user-select: none;
  -webkit-user-select: none;
}

.game-board {
  display: grid;
  grid-template-rows: auto 1fr;
  grid-template-columns: repeat(7, 1fr);
  height: 93dvh;
  padding: clamp(4px, 1vmin, 12px);
  gap: clamp(4px, 1vmin, 8px);
  row-gap: clamp(20px, 1vmin, 20px);
  column-gap: clamp(4px, 1vmin, 8px);
}

/* ── Top row ── */

.top-row {
  display: flex;
  grid-column: 1 / -1;
  justify-content: space-between;
  align-items: flex-start;
  gap: clamp(4px, 1vmin, 8px);
  min-height: clamp(56px, 8.4vmin, 112px);
}

.stock-area {
  display: flex;
  gap: clamp(4px, 1vmin, 8px);
  align-items: flex-start;
}

.foundation-area {
  display: flex;
  gap: clamp(4px, 1vmin, 8px);
  align-items: flex-start;
}

/* ── Pile slots ── */

.pile-slot {
  width: clamp(56px, 8vmin, 90px);
  height: clamp(78px, 11vmin, 126px);
  border-radius: clamp(3px, 0.75vmin, 6px);
  position: relative;
}

.pile-slot.stock {
  border: clamp(1px, 0.2vmin, 2px) solid rgba(255, 255, 255, 0.4);
  cursor: pointer;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pile-slot.stock:hover {
  background: rgba(255, 255, 255, 0.15);
}

.pile-slot.stock.empty::after {
  content: '↻';
  font-size: clamp(12px, 2.5vmin, 20px);
  color: rgba(255, 255, 255, 0.5);
}

/* Foundation placeholders */
.foundation {
  border: clamp(1px, 0.2vmin, 2px) dashed rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.foundation::before {
  content: attr(data-suit);
  font-size: clamp(14px, 2.5vmin, 20px);
  color: rgba(255, 255, 255, 0.25);
}

/* ── Tableau columns ── */

.tableau {
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 80px;
}

/* Empty column placeholder — rendered by JS when needed */

/* ── Cards ── */

.card {
  width: clamp(56px, 8vmin, 90px);
  height: clamp(78px, 11vmin, 126px);
  background: white;
  border-radius: clamp(3px, 0.75vmin, 6px);
  box-shadow: 0 clamp(1px, 0.2vmin, 1px) clamp(2px, 0.5vmin, 2px) rgba(0, 0, 0, 0.25);
  position: absolute;
  cursor: grab;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
  z-index: 1;
}

.card.face-down {
  background: linear-gradient(135deg, #1a3a8a, #2255cc);
  border: clamp(1px, 0.15vmin, 1px) solid rgba(255, 255, 255, 0.3);
  cursor: default;
}

.card.face-down::after {
  content: '';
  position: absolute;
  inset: clamp(2px, 0.4vmin, 2px);
  border: clamp(1px, 0.1vmin, 1px) solid rgba(255, 255, 255, 0.15);
  border-radius: clamp(1px, 0.3vmin, 1px);
}

.card.red {
  color: #cc0000;
}

.card.black {
  color: #111;
}

.card.selected {
  box-shadow: 0 0 clamp(2px, 1vmin, 4px) clamp(1px, 0.3vmin, 3px) #ffcc00;
  z-index: 100;
}

.card.dragging {
  z-index: 1000;
  box-shadow: 0 clamp(2px, 1vmin, 4px) clamp(4px, 2vmin, 8px) rgba(0, 0, 0, 0.4);
  cursor: grabbing;
  transition: none;
}

/* Card content */
.card-corner {
  position: absolute;
  font-size: clamp(12px, 2.5vmin, 18px);
  font-weight: bold;
  line-height: 1;
  pointer-events: none;
}

.card-corner-top {
  top: clamp(1px, 0.25vmin, 1px);
  left: clamp(1px, 0.25vmin, 1px);
}

.card-corner-bottom {
  bottom: clamp(1px, 0.25vmin, 1px);
  right: clamp(1px, 0.25vmin, 1px);
  transform: rotate(180deg);
}

.card-suit {
  display: block;
  font-size: clamp(14px, 2vmin, 20px);
  margin-top: 0.05vmin;
}

.card-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(10px, 3vmin, 26px);
  pointer-events: none;
}

/* ── Tableau card stacking ── */

.tableau .card {
  position: absolute;
}

/* ── Drop target highlighting ── */

.pile-slot.drop-target,
.tableau.drop-target {
  border-color: #4caf50 !important;
  background: rgba(76, 175, 80, 0.15) !important;
}

/* ── Controls ── */

.controls {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 4px 0;
}

.controls button {
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.9);
  color: #1a6b30;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  transition: background 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}

.controls button:hover {
  background: white;
}

.controls button:active {
  transform: scale(0.97);
}

/* ── Landing page ── */

.landing {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  height: 100dvh;
  background: linear-gradient(135deg, #1a6b30, #0d4a1e);
  overflow: hidden;
  position: relative;
}

.landing-content {
  text-align: center;
  z-index: 10;
}

.landing-title {
  font-size: clamp(32px, 8vmin, 64px);
  color: white;
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: -1px;
}

.landing-subtitle {
  font-size: clamp(14px, 3vmin, 24px);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
}

.variant-selector {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
  padding: 0 16px;
}

.variant-card {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s;
  min-width: 100px;
  max-width: 140px;
}

.variant-card:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
}

.variant-card.selected {
  background: rgba(255, 255, 255, 0.2);
  border-color: white;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.variant-icon {
  font-size: 32px;
  display: block;
  margin-bottom: 8px;
}

.variant-name {
  font-size: 16px;
  font-weight: 600;
  color: white;
  display: block;
  margin-bottom: 4px;
}

.variant-desc {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  display: block;
}

.start-btn {
  background: white;
  color: #1a6b30;
  border: none;
  padding: 12px 48px;
  font-size: 18px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.start-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
}

.start-btn:active {
  transform: scale(0.98);
}

/* Decorative cards */
.landing-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.card-decor {
  position: absolute;
  font-size: clamp(48px, 12vmin, 120px);
  color: rgba(255, 255, 255, 0.06);
  font-weight: bold;
}

.card-decor-1 { top: 5%; left: 5%; transform: rotate(-15deg); }
.card-decor-2 { top: 15%; right: 8%; transform: rotate(10deg); }
.card-decor-3 { bottom: 10%; left: 10%; transform: rotate(20deg); }
.card-decor-4 { bottom: 20%; right: 5%; transform: rotate(-8deg); }

/* ── Win overlay ── */

.win-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

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

.win-dialog {
  background: white;
  border-radius: 16px;
  padding: 32px 40px;
  text-align: center;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.win-dialog h1 {
  font-size: 28px;
  color: #1a6b30;
  margin-bottom: 8px;
}

.win-subtitle {
  font-size: 14px;
  color: #666;
  margin-bottom: 20px;
}

.win-dialog button {
  padding: 10px 32px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  background: #1a6b30;
  color: white;
  cursor: pointer;
  transition: background 0.15s;
}

.win-dialog button:hover {
  background: #155a26;
}