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

/* ── Variables ──────────────────────────────────────────────────────────── */
:root {
  --green:            #2d6a4f;
  --green-dark:       #1b4332;
  --navy:             #1c3b6e;
  --gold:             rgba(255, 215, 0, 0.88);
  --card-h:           112px;
  --face-down-reveal: 18px;
  --face-up-reveal:   30px;
  --gap:              5px;
  --radius:           7px;
  --pad:              6px;
}

@media (max-width: 500px) {
  :root {
    --face-down-reveal: 14px;
    --face-up-reveal:   22px;
    --gap:              3px;
    --pad:              3px;
  }
}

/* ── Page ───────────────────────────────────────────────────────────────── */
html, body {
  min-height: 100%;
  background: var(--green);
  font-family: system-ui, -apple-system, sans-serif;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  overflow-x: hidden;
}

/* ── Game container ─────────────────────────────────────────────────────── */
#game {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--pad);
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-height: 100vh;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
#game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 0 2px;
}

#game-header h1 {
  font-size: clamp(1rem, 4vw, 1.5rem);
  font-weight: 700;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

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

/* Shared button style */
#new-game-btn, #play-again-btn, #how-to-btn,
#close-how-to-btn, #close-prefs-btn,
#new-game-after-timeout-btn, #reset-stats-btn {
  background: #fff;
  color: var(--green-dark);
  border: none;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: clamp(0.75rem, 2.5vw, 0.9rem);
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  transition: background 0.12s, transform 0.1s;
  font-family: inherit;
}
#new-game-btn:hover, #play-again-btn:hover, #how-to-btn:hover,
#close-how-to-btn:hover, #close-prefs-btn:hover,
#new-game-after-timeout-btn:hover { background: #e8f5e9; }

#new-game-btn:active, #play-again-btn:active, #how-to-btn:active,
#close-how-to-btn:active, #close-prefs-btn:active,
#new-game-after-timeout-btn:active { transform: scale(0.97); }

#prefs-btn {
  background: rgba(255,255,255,0.18);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.12s;
}
#prefs-btn:hover { background: rgba(255,255,255,0.28); }

/* ── HUD ────────────────────────────────────────────────────────────────── */
#hud {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 0;
}

#undo-btn {
  background: rgba(255,255,255,0.18);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: clamp(0.72rem, 2vw, 0.84rem);
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s, opacity 0.15s;
}
#undo-btn:hover:not(:disabled) { background: rgba(255,255,255,0.28); }
#undo-btn:disabled { opacity: 0.38; cursor: default; }

#timer-display {
  font-size: clamp(0.8rem, 2.5vw, 1rem);
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  min-width: 36px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
#timer-display.timer-warning { color: #ff6b6b; }

#move-counter {
  font-size: clamp(0.72rem, 2vw, 0.84rem);
  color: rgba(255,255,255,0.7);
  flex: 1;
  text-align: center;
}

#auto-complete-btn {
  background: #f9c74f;
  color: #333;
  border: none;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: clamp(0.7rem, 1.8vw, 0.82rem);
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s;
  margin-left: auto;
}
#auto-complete-btn:hover { background: #f3b700; }
#auto-complete-btn.hidden { display: none; }

/* ── 7-column grids ─────────────────────────────────────────────────────── */
#top-row, #tableau {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--gap);
}

/* ── Piles ──────────────────────────────────────────────────────────────── */
.pile {
  aspect-ratio: 5 / 7;
  border-radius: var(--radius);
  border: 2px dashed rgba(255,255,255,0.22);
  background: rgba(0,0,0,0.14);
  position: relative;
  cursor: pointer;
  overflow: visible;
}

.pile-hint, .col-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--card-h) * 0.28);
  color: rgba(255,255,255,0.28);
  pointer-events: none;
  line-height: 1;
}

#stock.empty::after {
  content: '↺';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--card-h) * 0.38);
  color: rgba(255,255,255,0.35);
  pointer-events: none;
}

/* ── Tableau columns ─────────────────────────────────────────────────────── */
.column {
  border-radius: var(--radius);
  border: 2px dashed rgba(255,255,255,0.15);
  background: rgba(0,0,0,0.10);
  position: relative;
  min-height: calc(var(--card-h) + 4px);
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  width: 100%;
  aspect-ratio: 5 / 7;
  border-radius: var(--radius);
  border: 1px solid rgba(0,0,0,0.18);
  position: relative;
  cursor: pointer;
  box-shadow: 1px 2px 5px rgba(0,0,0,0.28);
  flex-shrink: 0;
  display: block;
}

.column .face-down + .card { margin-top: calc(var(--face-down-reveal) - var(--card-h)); }
.column .face-up   + .card { margin-top: calc(var(--face-up-reveal)   - var(--card-h)); }

/* Card flip-in animation for newly revealed cards */
@keyframes card-flip-in {
  from { transform: rotateY(90deg); opacity: 0.6; }
  to   { transform: rotateY(0deg);  opacity: 1; }
}
.card.just-flipped { animation: card-flip-in 0.32s ease; }

/* ── Card faces ─────────────────────────────────────────────────────────── */
.card-face {
  position: absolute;
  inset: 0;
  border-radius: calc(var(--radius) - 1px);
  overflow: hidden;
}

.card.face-up  .card-front { display: flex; }
.card.face-up  .card-back  { display: none; }
.card.face-down .card-front { display: none; }
.card.face-down .card-back  { display: flex; }

/* ── Card front ─────────────────────────────────────────────────────────── */
.card-front {
  background: #fff;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(2px, 0.4vw, 5px);
  color: #111;
}
.card.red .card-front { color: #c0392b; }

.corner { display: flex; flex-direction: column; align-items: center; line-height: 1.1; }
.corner.tl { align-self: flex-start; align-items: flex-start; }
.corner.br { align-self: flex-end;   align-items: flex-end; transform: rotate(180deg); }

.corner .rank  { font-size: max(8px,  calc(var(--card-h) * 0.14)); font-weight: 700; line-height: 1; }
.corner .csuit { font-size: max(7px,  calc(var(--card-h) * 0.12)); line-height: 1; }
.suit-center   { font-size: max(16px, calc(var(--card-h) * 0.30)); text-align: center; line-height: 1; align-self: center; }

/* ── Card back ──────────────────────────────────────────────────────────── */
.card-back {
  background: var(--navy);
  /* inherits position:absolute; inset:0 from .card-face — do NOT add position:relative */
}

.card-back::before {
  content: '';
  position: absolute;
  inset: max(3px, calc(var(--card-h) * 0.04));
  border: 1.5px solid rgba(255,215,0,0.28);
  border-radius: calc(var(--radius) - 3px);
  pointer-events: none;
}

.back-c, .back-r {
  position: absolute;
  font-family: Georgia, 'Times New Roman', serif;
  font-weight: 900;
  font-style: italic;
  color: var(--gold);
  font-size: max(15px, calc(var(--card-h) * 0.34));
  line-height: 1;
  pointer-events: none;
}
/* Both letters centered as a pair around the card's midpoint.
   Each is anchored at its own centre via translate(-50%,-50%).
   The two anchor points are symmetric about (50%, 50%). */
.back-c { top: 38%; left: 44%; transform: translate(-50%, -50%); }
.back-r { top: 62%; left: 56%; transform: translate(-50%, -50%); }

/* ── Drag ghost ─────────────────────────────────────────────────────────── */
.drag-ghost { position: fixed; z-index: 9999; pointer-events: none; }
.drag-ghost .card { box-shadow: 3px 6px 14px rgba(0,0,0,0.45); }

/* ── Shuffle animation ──────────────────────────────────────────────────── */
.shuffle-deck { position: absolute; inset: 0; z-index: 10; pointer-events: none; }

.s-card {
  position: absolute;
  inset: 0;
  background: var(--navy);
  border-radius: var(--radius);
  border: 1px solid rgba(0,0,0,0.15);
  box-shadow: 1px 2px 5px rgba(0,0,0,0.28);
  overflow: hidden;
}
.s-card::before {
  content: '';
  position: absolute;
  inset: max(3px, calc(var(--card-h) * 0.04));
  border: 1.5px solid rgba(255,215,0,0.28);
  border-radius: calc(var(--radius) - 3px);
}
.s-card:nth-child(1) { animation: s-fan-left   0.58s ease forwards; }
.s-card:nth-child(2) { animation: s-fan-center  0.58s ease forwards; z-index: 2; }
.s-card:nth-child(3) { animation: s-fan-right   0.58s ease forwards; z-index: 1; }

@keyframes s-fan-left   { 0%,100%{transform:none} 42%{transform:rotate(-13deg) translate(-9px,-7px)} }
@keyframes s-fan-center { 0%,100%{transform:none} 42%{transform:translateY(-9px)} }
@keyframes s-fan-right  { 0%,100%{transform:none} 42%{transform:rotate(13deg) translate(9px,-7px)} }

/* ── Win / Times-up overlay ─────────────────────────────────────────────── */
#win-screen, #times-up-screen {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.60);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
#win-screen.hidden, #times-up-screen.hidden { display: none; }

.win-box {
  background: #fff;
  border-radius: 16px;
  padding: 36px 48px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  animation: modal-pop 0.25s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes modal-pop {
  from { transform: scale(0.8); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.win-suits { font-size: 2rem; letter-spacing: 8px; color: #c0392b; }
.win-box h2 { font-size: clamp(1.6rem, 6vw, 2.4rem); color: var(--green-dark); font-weight: 700; }
#win-stats { font-size: 0.9rem; color: #555; line-height: 1.7; }

/* Win card animation */
.win-card { border-radius: var(--radius); }

/* ── How to Play ────────────────────────────────────────────────────────── */
#how-to-screen, #prefs-screen {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.60);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}
#how-to-screen.hidden, #prefs-screen.hidden { display: none; }

.how-to-box {
  background: #fff;
  border-radius: 16px;
  padding: 28px 32px;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: modal-pop 0.22s cubic-bezier(0.34,1.56,0.64,1);
}
.how-to-box h2 { font-size: clamp(1.2rem, 4vw, 1.6rem); color: var(--green-dark); font-weight: 700; }
.how-to-box ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.how-to-box li {
  font-size: clamp(0.82rem, 2.5vw, 0.95rem);
  line-height: 1.5;
  color: #222;
  padding-left: 14px;
  border-left: 3px solid var(--green);
}
#close-how-to-btn { align-self: flex-end; }

/* ── Preferences modal ──────────────────────────────────────────────────── */
.modal-box {
  background: #fff;
  border-radius: 16px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modal-pop 0.22s cubic-bezier(0.34,1.56,0.64,1);
}

.modal-tabs {
  display: flex;
  border-bottom: 1px solid #e0e0e0;
}
.tab-btn {
  flex: 1;
  padding: 12px 8px;
  border: none;
  background: #f5f5f5;
  color: #555;
  font-size: clamp(0.78rem, 2.5vw, 0.9rem);
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s, color 0.12s;
}
.tab-btn:hover { background: #eee; }
.tab-btn.active { background: #fff; color: var(--green-dark); border-bottom: 2px solid var(--green); }

.tab-panel { padding: 20px; display: flex; flex-direction: column; gap: 14px; min-height: 220px; }
.tab-panel.hidden { display: none; }

.pref-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.pref-row label { font-size: 0.88rem; color: #333; font-weight: 500; }
.pref-row select {
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 0.85rem;
  font-family: inherit;
  background: #fafafa;
  cursor: pointer;
}
.pref-check { align-items: center; }
.pref-check input[type=checkbox] { width: 18px; height: 18px; cursor: pointer; }

.initials-input {
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 1rem;
  font-weight: 700;
  font-family: Georgia, serif;
  width: 60px;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 4px;
}

.pref-section { display: flex; flex-direction: column; gap: 8px; }
.pref-label { font-size: 0.88rem; color: #333; font-weight: 500; }

.color-swatches { display: flex; gap: 8px; flex-wrap: wrap; }
.color-swatch {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: transform 0.1s, border-color 0.1s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.color-swatch:hover { transform: scale(1.12); }
.color-swatch.selected { border-color: #333; transform: scale(1.12); }

#timed-options.hidden { display: none; }

/* Stats */
.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: 0.88rem;
  color: #333;
}
.stat-row span:last-child { font-weight: 700; color: var(--green-dark); }
#reset-stats-btn {
  margin-top: 6px;
  align-self: flex-start;
  background: #fee;
  color: #c00;
  border: 1px solid #f99;
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
#reset-stats-btn:hover { background: #fdd; }

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid #eee;
  display: flex;
  justify-content: flex-end;
}