/* ── CSS custom properties (mobile-first scaling) ───────────────────────── */
:root {
  --card-w:    40px;
  --card-h:    58px;
  --card-radius: 5px;
  --stack-mt:  -36px;   /* shows 22px of each buried card */
  --rank-fs:   13px;
  --col-gap:    2px;
  --slot-border: 1.5px;
  --card-pad:   3px;
}

@media (min-width: 400px) {
  :root {
    --card-w:   46px;
    --card-h:   66px;
    --stack-mt: -42px;  /* shows 24px */
    --rank-fs:  15px;
    --col-gap:   3px;
    --card-pad:  3px;
  }
}

@media (min-width: 520px) {
  :root {
    --card-w:   56px;
    --card-h:   80px;
    --stack-mt: -52px;  /* shows 28px */
    --rank-fs:  18px;
    --col-gap:   4px;
    --card-pad:  4px;
  }
}

@media (min-width: 680px) {
  :root {
    --card-w:   68px;
    --card-h:   96px;
    --stack-mt: -62px;  /* shows 34px */
    --rank-fs:  21px;
    --col-gap:   6px;
    --card-pad:  4px;
  }
}

@media (min-width: 860px) {
  :root {
    --card-w:   80px;
    --card-h:  110px;
    --stack-mt: -64px;  /* shows 46px */
    --rank-fs:  24px;
    --col-gap:   8px;
    --card-pad:  5px;
  }
}

/* ── App shell ────────────────────────────────────────────────────────────── */
#app {
  padding: 8px;
  box-sizing: border-box;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
.game-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 8px;
}

.header-row1 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.header-title {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

@media (min-width: 520px) { .header-title { font-size: 18px; } }
@media (min-width: 860px) { .header-title { font-size: 22px; } }

.header-stats {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 12px;
}

@media (min-width: 520px) { .header-stats { font-size: 13px; } }

.header-row2 {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.hbtn {
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  color: #fff;
  transition: opacity 0.15s, background 0.15s;
  white-space: nowrap;
  touch-action: manipulation;
}

.hbtn:disabled { opacity: 0.4; cursor: default; }

@media (min-width: 520px) { .hbtn { font-size: 13px; padding: 6px 12px; } }
@media (min-width: 860px) { .hbtn { font-size: 14px; padding: 6px 14px; } }

.hbtn-new    { background: #16a34a; }
.hbtn-new:not(:disabled):hover    { background: #15803d; }
.hbtn-undo   { background: #374151; }
.hbtn-undo:not(:disabled):hover   { background: #1f2937; }
.hbtn-hint   { background: #d97706; }
.hbtn-hint:not(:disabled):hover   { background: #b45309; }
.hbtn-stats  { background: #7c3aed; }
.hbtn-stats:not(:disabled):hover  { background: #6d28d9; }

/* ── Top row: free cells + foundations ──────────────────────────────────── */
.top-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 6px;
  margin-bottom: 8px;
}

.top-group {
  display: flex;
  gap: var(--col-gap);
}

/* ── Free cell / Foundation slot ─────────────────────────────────────────── */
.free-cell-slot {
  width: var(--card-w);
  height: var(--card-h);
  border-radius: var(--card-radius);
  border: var(--slot-border) dashed #4ade80;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s;
  touch-action: manipulation;
}

.free-cell-slot .card {
  width: 100%;
  height: 100%;
}

.empty-label {
  pointer-events: none;
  font-size: clamp(8px, 2vw, 13px);
  font-weight: 600;
  color: #4ade80;
}

/* ── Card base ───────────────────────────────────────────────────────────── */
.card {
  position: relative;
  width: var(--card-w);
  height: var(--card-h);
  background: #fff;
  border-radius: var(--card-radius);
  border: 1.5px solid #aaa;
  box-shadow: 0 3px 6px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.25);
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  flex-shrink: 0;
  user-select: none;
  -webkit-user-select: none;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  font-family: 'Georgia', serif;
  touch-action: manipulation;
  overflow: hidden;
}

.card.draggable { cursor: grab; }
.card.draggable:active { cursor: grabbing; }
.card.not-draggable { cursor: pointer; opacity: 1; }

.card.draggable:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0,0,0,0.45), 0 2px 4px rgba(0,0,0,0.25);
}

/* ── Card internals ──────────────────────────────────────────────────────── */

/* Top strip: rank on the left, suit symbol on the right — same font size */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--card-pad) var(--card-pad) 0;
  flex-shrink: 0;
  line-height: 1;
  gap: 1px;
}

.card-rank,
.card-suit-sm {
  font-size: var(--rank-fs);
  font-weight: bold;
  line-height: 1;
}

/* Bottom area: large suit symbol centred, sized to fill ~70% of the bottom half */
.card-body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-suit-lg {
  font-size: calc(var(--card-h) * 0.58);
  line-height: 1;
  display: block;
}

/* ── Tableau ─────────────────────────────────────────────────────────────── */
.tableau-area {
  display: flex;
  gap: var(--col-gap);
  justify-content: center;
}

.tableau-col {
  width: var(--card-w);
  min-height: calc(var(--card-h) + 4px);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tableau-card {
  width: var(--card-w);
  position: relative;
  z-index: 1;
}

.tableau-card.stacked {
  margin-top: var(--stack-mt);
}

.empty-col-slot {
  width: var(--card-w);
  height: var(--card-h);
  border-radius: var(--card-radius);
  border: var(--slot-border) dashed #4ade80;
  touch-action: manipulation;
}

/* ── Drop hover states ───────────────────────────────────────────────────── */
.drop-zone.drop-hover,
.free-cell-slot.drop-hover {
  background: rgba(74, 222, 128, 0.18);
  border-color: #86efac;
}

.empty-col-slot.drop-hover {
  background: rgba(74, 222, 128, 0.18);
  border-color: #86efac;
}

.drop-hover-card {
  box-shadow: 0 0 0 3px #86efac, 0 2px 6px rgba(0,0,0,0.35);
}

/* ── Selected card (click-to-move) ──────────────────────────────────────── */
.card-selected {
  animation: card-selected-pulse 0.75s ease-in-out infinite;
  z-index: 10;
}

@keyframes card-selected-pulse {
  0%, 100% {
    box-shadow: 0 0 0 2px #3b82f6, 0 0 12px 3px rgba(59,130,246,0.5), 0 3px 6px rgba(0,0,0,0.4);
    transform: translateY(-3px);
  }
  50% {
    box-shadow: 0 0 0 3px #2563eb, 0 0 20px 7px rgba(59,130,246,0.65), 0 3px 6px rgba(0,0,0,0.4);
    transform: translateY(-6px);
  }
}

/* ── Hint highlights ─────────────────────────────────────────────────────── */
.hint-source {
  animation: hint-pulse-source 0.9s ease-in-out infinite;
  z-index: 10;
}

.hint-target {
  animation: hint-pulse-target 0.9s ease-in-out infinite;
}

.hint-target-card {
  animation: hint-pulse-target-card 0.9s ease-in-out infinite;
}

@keyframes hint-pulse-source {
  0%, 100% {
    box-shadow: 0 0 0 2px #fbbf24, 0 0 10px 3px rgba(251,191,36,0.5), 0 3px 6px rgba(0,0,0,0.4);
    transform: translateY(-2px);
  }
  50% {
    box-shadow: 0 0 0 3px #f59e0b, 0 0 20px 7px rgba(251,191,36,0.65), 0 3px 6px rgba(0,0,0,0.4);
    transform: translateY(-5px);
  }
}

@keyframes hint-pulse-target {
  0%, 100% {
    box-shadow: 0 0 0 2px #34d399, 0 0 8px 2px rgba(52,211,153,0.4);
    background: rgba(52,211,153,0.12);
  }
  50% {
    box-shadow: 0 0 0 3px #10b981, 0 0 18px 5px rgba(52,211,153,0.6);
    background: rgba(52,211,153,0.22);
  }
}

@keyframes hint-pulse-target-card {
  0%, 100% {
    box-shadow: 0 0 0 2px #34d399, 0 0 8px 2px rgba(52,211,153,0.5), 0 3px 6px rgba(0,0,0,0.4);
  }
  50% {
    box-shadow: 0 0 0 3px #10b981, 0 0 18px 6px rgba(52,211,153,0.65), 0 3px 6px rgba(0,0,0,0.4);
  }
}

/* ── Win overlay ─────────────────────────────────────────────────────────── */
.win-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  cursor: pointer;
  overflow: hidden;
  padding: 16px;
}

.win-box {
  background: white;
  border-radius: 16px;
  padding: 28px 36px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  z-index: 101;
  animation: pop-in 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

@media (min-width: 520px) {
  .win-box { padding: 40px 56px; }
}

@keyframes pop-in {
  from { transform: scale(0.7); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

/* ── Confetti ────────────────────────────────────────────────────────────── */
.confetti-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -12px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  animation: confetti-fall linear infinite;
}

@keyframes confetti-fall {
  0%   { transform: translateY(-10px) rotate(0deg);   opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

/* ── Stats overlay ───────────────────────────────────────────────────────── */
.stats-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 10px;
}

.stats-modal {
  background: #f8fafc;
  border-radius: 14px;
  width: 100%;
  max-width: 680px;
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,0.45);
  display: flex;
  flex-direction: column;
  animation: pop-in 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

.stats-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 12px;
  border-bottom: 1px solid #e2e8f0;
}

@media (min-width: 520px) { .stats-header { padding: 18px 22px 14px; } }

.stats-header h2 {
  font-size: 17px;
  font-weight: 700;
  color: #1e293b;
}

@media (min-width: 520px) { .stats-header h2 { font-size: 20px; } }

.stats-close {
  background: #e2e8f0;
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  font-size: 14px;
  cursor: pointer;
  color: #64748b;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  flex-shrink: 0;
  touch-action: manipulation;
}
.stats-close:hover { background: #cbd5e1; color: #1e293b; }

.stats-summary {
  display: flex;
  gap: 8px;
  padding: 12px 14px;
  flex-wrap: wrap;
}

@media (min-width: 520px) { .stats-summary { padding: 16px 22px; gap: 10px; } }

.stat-card {
  flex: 1;
  min-width: 70px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 10px 8px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.07);
}

@media (min-width: 520px) { .stat-card { padding: 12px 10px; min-width: 90px; } }

.stat-card.green  { border-top: 3px solid #22c55e; }
.stat-card.blue   { border-top: 3px solid #3b82f6; }
.stat-card.orange { border-top: 3px solid #f97316; }
.stat-card.purple { border-top: 3px solid #a855f7; }

.stat-value {
  font-size: 22px;
  font-weight: 800;
  color: #1e293b;
  line-height: 1;
}

@media (min-width: 520px) { .stat-value { font-size: 26px; } }

.stat-label {
  font-size: 9px;
  color: #64748b;
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

@media (min-width: 520px) { .stat-label { font-size: 11px; } }

.stats-bests {
  padding: 0 14px 12px;
}

@media (min-width: 520px) { .stats-bests { padding: 0 22px 14px; } }

.bests-row {
  display: flex;
  gap: 10px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 12px 14px;
  flex-wrap: wrap;
}

.best-item {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 100px;
}

.best-icon { font-size: 17px; }

.best-val {
  font-size: 14px;
  font-weight: 700;
  color: #1e293b;
}

.best-lbl {
  font-size: 10px;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stats-history {
  padding: 0 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (min-width: 520px) { .stats-history { padding: 0 22px 14px; } }

.history-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.history-title {
  font-size: 13px;
  font-weight: 600;
  color: #374151;
}

.filter-pills { display: flex; gap: 5px; }

.pill {
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid #d1d5db;
  background: #fff;
  font-size: 11px;
  font-weight: 600;
  color: #6b7280;
  cursor: pointer;
  transition: all 0.15s;
  touch-action: manipulation;
}
.pill:hover { background: #f3f4f6; }
.pill.active       { background: #1e293b; color: #fff; border-color: #1e293b; }
.pill.active.green { background: #16a34a; border-color: #16a34a; }
.pill.active.red   { background: #dc2626; border-color: #dc2626; }

.history-empty {
  text-align: center;
  color: #9ca3af;
  font-size: 13px;
  padding: 24px 0;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
}

@media (min-width: 520px) { .history-table { font-size: 13px; } }

.history-table thead { background: #f1f5f9; }

.history-table th {
  text-align: left;
  padding: 8px 10px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #64748b;
  border-bottom: 1px solid #e2e8f0;
}

.history-table td {
  padding: 8px 10px;
  border-bottom: 1px solid #f1f5f9;
  color: #374151;
}

.history-table tr:last-child td { border-bottom: none; }

.row-win  { background: #f0fdf4; }
.row-loss { background: #fff; }

.row-num  { color: #94a3b8; font-size: 11px; width: 28px; }
.row-date { color: #94a3b8; font-size: 11px; white-space: nowrap; }

.result-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: 700;
}
.badge-win  { background: #dcfce7; color: #15803d; }
.badge-loss { background: #fee2e2; color: #b91c1c; }

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.page-btn {
  background: #fff;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  padding: 5px 14px;
  font-size: 13px;
  cursor: pointer;
  color: #374151;
  transition: background 0.15s;
  touch-action: manipulation;
}
.page-btn:hover:not(:disabled) { background: #f3f4f6; }
.page-btn:disabled { opacity: 0.4; cursor: default; }

.page-info { font-size: 13px; color: #6b7280; }

.stats-footer {
  padding: 10px 14px 16px;
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid #e2e8f0;
}

@media (min-width: 520px) { .stats-footer { padding: 12px 22px 18px; } }

.danger-btn {
  background: #fff;
  border: 1px solid #fca5a5;
  color: #dc2626;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
  touch-action: manipulation;
}
.danger-btn:hover { background: #fef2f2; }

/* ── Vue transitions ─────────────────────────────────────────────────────── */
.fade-enter-active, .fade-leave-active { transition: opacity 0.25s; }
.fade-enter, .fade-leave-to { opacity: 0; }