/* ── Google Font ──────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

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

:root {
  --felt:        #1b5e33;
  --felt-dark:   #144a27;
  --felt-light:  #22713d;
  --accent:      #f0c040;
  --accent-glow: rgba(240,192,64,.35);
  --card-bg:     #fdfaf3;
  --card-shadow: 0 4px 16px rgba(0,0,0,.45), 0 1px 3px rgba(0,0,0,.3);
  --card-hover:  0 8px 24px rgba(0,0,0,.55), 0 2px 6px rgba(0,0,0,.4);
  --red:         #c0392b;
  --black:       #1a1a2e;
  --radius:      10px;
  --pile-w:      90px;
  --pile-h:      126px;
  --card-w:      90px;
  --card-h:      126px;
  --gap:         12px;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--felt-dark);
  min-height: 100vh;
  overflow-x: hidden;
  user-select: none;
}

/* ── Felt texture overlay ─────────────────────────────────── */
.felt-overlay {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    radial-gradient(ellipse 120% 60% at 50% 0%, rgba(255,255,255,.04) 0%, transparent 70%),
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,.07) 2px,
      rgba(0,0,0,.07) 4px
    );
}

/* ── Header ───────────────────────────────────────────────── */
header {
  position: relative; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  background: rgba(0,0,0,.30);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.07);
  box-shadow: 0 2px 12px rgba(0,0,0,.4);
}

.logo {
  font-size: 1.45rem; font-weight: 700; letter-spacing: .04em;
  color: var(--accent);
  text-shadow: 0 0 18px var(--accent-glow);
}

.header-center {
  display: flex; gap: 24px;
}

.stat-box {
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 8px;
  padding: 6px 18px;
  min-width: 80px;
}
.stat-label { font-size: .6rem; font-weight: 600; letter-spacing: .12em; color: rgba(255,255,255,.45); }
.stat-value { font-size: 1.15rem; font-weight: 700; color: #fff; }

.header-right { display: flex; gap: 10px; align-items: center; }

button {
  cursor: pointer; border: none; outline: none;
  font-family: inherit; font-size: .82rem; font-weight: 600;
  letter-spacing: .05em;
  padding: 8px 18px; border-radius: 8px;
  transition: transform .12s, opacity .12s, box-shadow .12s;
}
button:active { transform: scale(.96); }

#new-game-btn, #win-new-game-btn {
  background: var(--accent);
  color: #1a1a00;
  box-shadow: 0 2px 10px var(--accent-glow);
}
#new-game-btn:hover, #win-new-game-btn:hover {
  box-shadow: 0 4px 18px var(--accent-glow);
  opacity: .92;
}

#undo-btn, #help-btn {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.8);
}
#undo-btn:hover, #help-btn:hover { background: rgba(255,255,255,.18); }

/* ── Game area ────────────────────────────────────────────── */
#game-area {
  position: relative; z-index: 5;
  padding: 22px 24px 12px;
  display: flex; flex-direction: column; gap: 18px;
}

/* ── Top row ──────────────────────────────────────────────── */
#top-row {
  display: flex; align-items: flex-start; gap: var(--gap);
}
#top-row .spacer { flex: 1; min-width: var(--pile-w); }

/* ── Tableau row ─────────────────────────────────────────── */
#tableau-row {
  display: flex; align-items: flex-start; gap: var(--gap);
}

/* ── Pile ghost ───────────────────────────────────────────── */
.pile {
  width: var(--pile-w); min-width: var(--pile-w);
  height: var(--pile-h);
  border-radius: var(--radius);
  position: relative;
  flex-shrink: 0;
}

/* Empty pile border */
.pile::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: var(--radius);
  border: 2px dashed rgba(255,255,255,.18);
  pointer-events: none;
}

/* Foundation suit hint */
.foundation-pile::after {
  content: attr(data-suit);
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.2rem;
  color: rgba(255,255,255,.15);
  pointer-events: none;
}

/* Stock pile click ring */
.stock-pile::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: var(--radius);
  pointer-events: none;
}

/* Drop target highlight */
.pile.drag-over::before {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 2px var(--accent), 0 0 12px var(--accent-glow);
}

/* ── Cards ────────────────────────────────────────────────── */
.card {
  position: absolute;
  width: var(--card-w); height: var(--card-h);
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  cursor: default;
  transition: box-shadow .15s, transform .15s;
  overflow: hidden;
  backface-visibility: hidden;
  will-change: transform;
  touch-action: none;
}

.card:not(.face-down) { cursor: grab; }
.card:not(.face-down):active { cursor: grabbing; }
.card:hover:not(.face-down) { box-shadow: var(--card-hover); }

/* Card face-down back pattern */
.card.face-down::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, #1565c0 25%, #0d47a1 25%, #0d47a1 50%,
      #1565c0 50%, #1565c0 75%, #0d47a1 75%);
  background-size: 18px 18px;
}
.card.face-down::after {
  content: '';
  position: absolute; inset: 6px;
  border-radius: 6px;
  border: 2px solid rgba(255,255,255,.22);
  pointer-events: none;
}

/* Rank + suit corners */
.card-corner {
  position: absolute;
  display: flex; flex-direction: column; align-items: center;
  line-height: 1;
  pointer-events: none;
}
.card-corner.top-left  { top: 6px; left: 7px; }
.card-corner.bot-right { bottom: 6px; right: 7px; transform: rotate(180deg); }

.card-rank { font-weight: 700; font-size: .9rem; }
.card-suit { font-size: .72rem; margin-top: 1px; }

/* Center suit display */
.card-center {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.8rem;
  pointer-events: none;
  opacity: .13;
}

/* Color classes */
.red  .card-rank, .red  .card-suit, .red  .card-center { color: var(--red); }
.black .card-rank, .black .card-suit, .black .card-center { color: var(--black); }

/* Dragging state */
.card.dragging {
  opacity: .85;
  box-shadow: 0 16px 40px rgba(0,0,0,.7);
  transform: scale(1.05) rotate(1.5deg);
  z-index: 9999;
  pointer-events: none;
}

/* Prevent text selection during drag */
body.is-dragging { user-select: none; cursor: grabbing !important; }
body.is-dragging * { cursor: grabbing !important; }

/* Ghost placeholder during drag */
.card.drag-ghost { opacity: .28; pointer-events: none; }

/* Card flip animation */
@keyframes flipIn {
  from { transform: rotateY(90deg) scale(.9); opacity: 0; }
  to   { transform: rotateY(0deg)  scale(1);  opacity: 1; }
}
.card.flip-anim { animation: flipIn .22s ease-out forwards; }

/* Card deal animation */
@keyframes dealIn {
  from { transform: translateY(-60px) scale(.92); opacity: 0; }
  to   { transform: translateY(0)     scale(1);   opacity: 1; }
}
.card.deal-anim { animation: dealIn .22s cubic-bezier(.22,1,.36,1) both; }

/* Fly-to-foundation animation */
@keyframes flyTo {
  to { transform: var(--fly-target); opacity: 0; }
}

/* Stock empty hint */
.stock-empty::after {
  content: '↺';
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.6rem;
  color: rgba(255,255,255,.28);
  pointer-events: none;
}

/* Tableau piles expand downward */
.tableau-pile { height: auto; min-height: var(--pile-h); }

/* ── Help / Instructions modal ───────────────────────────── */
#help-overlay {
  position: fixed; inset: 0; z-index: 110;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.70);
  backdrop-filter: blur(6px);
  animation: fadeIn .25s ease;
  padding: 16px;
}
#help-overlay.hidden { display: none; }

.help-box {
  position: relative;
  background: linear-gradient(150deg, #1a3526, #112b1d);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 18px;
  padding: 36px 40px 32px;
  max-width: 580px; width: 100%;
  max-height: 88vh; overflow-y: auto;
  box-shadow: 0 28px 70px rgba(0,0,0,.75);
  animation: popIn .3s cubic-bezier(.22,1,.36,1) both;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.15) transparent;
}
.help-box::-webkit-scrollbar { width: 5px; }
.help-box::-webkit-scrollbar-thumb { background: rgba(255,255,255,.18); border-radius: 4px; }

.close-btn {
  position: absolute; top: 14px; right: 16px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.13);
  color: rgba(255,255,255,.6);
  font-size: .85rem; padding: 4px 9px;
  border-radius: 6px;
}
.close-btn:hover { background: rgba(255,255,255,.18); color: #fff; }

.help-box h2 {
  font-size: 1.5rem; color: var(--accent);
  margin-bottom: 22px; padding-right: 32px;
  text-shadow: 0 0 14px var(--accent-glow);
}

.help-section { margin-bottom: 22px; }
.help-section h3 {
  font-size: .78rem; font-weight: 700; letter-spacing: .1em;
  color: rgba(255,255,255,.45); text-transform: uppercase;
  margin-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  padding-bottom: 5px;
}
.help-section p,
.help-section li {
  font-size: .9rem; line-height: 1.65;
  color: rgba(255,255,255,.75);
}
.help-section ul { padding-left: 18px; }
.help-section li { margin-bottom: 5px; }
.help-section strong { color: #fff; }

.controls-table {
  width: 100%; border-collapse: collapse;
  font-size: .88rem; color: rgba(255,255,255,.75);
}
.controls-table tr:not(:last-child) td { border-bottom: 1px solid rgba(255,255,255,.06); }
.controls-table td { padding: 7px 6px; }
.controls-table td:first-child { color: #fff; font-weight: 600; white-space: nowrap; padding-right: 18px; }
.controls-table td:last-child  { color: rgba(255,255,255,.65); }

/* ── Win overlay ──────────────────────────────────────────── */
#win-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(6px);
  animation: fadeIn .4s ease;
}
#win-overlay.hidden { display: none; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.win-box {
  background: linear-gradient(145deg, #1e3a29, #143320);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 20px;
  padding: 48px 56px;
  text-align: center;
  box-shadow: 0 24px 60px rgba(0,0,0,.7);
  animation: popIn .4s cubic-bezier(.22,1,.36,1) both;
}
@keyframes popIn {
  from { transform: scale(.7); opacity: 0; }
  to   { transform: scale(1);  opacity: 1; }
}

.win-icon { font-size: 4rem; margin-bottom: 12px; }
.win-box h1 { font-size: 2.4rem; color: var(--accent); margin-bottom: 10px; }
.win-box p  { color: rgba(255,255,255,.65); font-size: .95rem; margin-bottom: 28px; }

/* ── Confetti canvas ──────────────────────────────────────── */
#confetti-canvas {
  position: fixed; inset: 0; pointer-events: none; z-index: 99;
}

/* ── Tutorial CTA inside help modal ──────────────────────── */
.help-tutorial-cta {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.08);
  text-align: center;
}

#tutorial-start-btn {
  background: var(--accent);
  color: #1a1a00;
  font-size: .9rem;
  padding: 10px 28px;
  border-radius: 8px;
  box-shadow: 0 2px 10px var(--accent-glow);
}
#tutorial-start-btn:hover {
  box-shadow: 0 4px 18px var(--accent-glow);
  opacity: .92;
}

/* ── Tutorial overlay ─────────────────────────────────────── */
#tutorial-overlay {
  position: fixed; inset: 0; z-index: 120;
  pointer-events: all;
}
#tutorial-overlay.hidden { display: none; }

#tutorial-overlay.tutorial-no-target {
  background: rgba(0,0,0,.78);
  backdrop-filter: blur(4px);
}

#tutorial-spotlight {
  position: fixed;
  border-radius: var(--radius);
  box-shadow: 0 0 0 9999px rgba(0,0,0,.78);
  pointer-events: none;
  transition: left .3s cubic-bezier(.22,1,.36,1),
              top .3s cubic-bezier(.22,1,.36,1),
              width .3s cubic-bezier(.22,1,.36,1),
              height .3s cubic-bezier(.22,1,.36,1);
  z-index: 121;
}

#tutorial-tooltip {
  position: fixed;
  background: linear-gradient(150deg, #1a3526, #112b1d);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 14px;
  padding: 20px 22px 16px;
  max-width: 320px;
  width: min(320px, calc(100vw - 32px));
  box-shadow: 0 16px 48px rgba(0,0,0,.7);
  z-index: 122;
  transition: top .3s cubic-bezier(.22,1,.36,1),
              left .3s cubic-bezier(.22,1,.36,1);
}

#tutorial-step-counter {
  display: block;
  font-size: .68rem; font-weight: 600; letter-spacing: .1em;
  color: var(--accent); text-transform: uppercase;
  margin-bottom: 6px; opacity: .85;
}

#tutorial-tooltip h3 {
  font-size: 1rem; color: #fff; margin-bottom: 8px;
}

#tutorial-tooltip p {
  font-size: .87rem; line-height: 1.6;
  color: rgba(255,255,255,.75); margin-bottom: 16px;
}

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

#tutorial-skip-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.45);
  font-size: .76rem; padding: 5px 11px;
}
#tutorial-skip-btn:hover { color: rgba(255,255,255,.8); background: rgba(255,255,255,.08); }

.tutorial-nav { display: flex; gap: 7px; }

#tutorial-prev-btn {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.8);
  font-size: .8rem; padding: 6px 14px;
}
#tutorial-prev-btn:hover { background: rgba(255,255,255,.18); }
#tutorial-prev-btn:disabled { opacity: .3; cursor: default; }
#tutorial-prev-btn:disabled:active { transform: none; }

#tutorial-next-btn {
  background: var(--accent); color: #1a1a00;
  font-size: .8rem; padding: 6px 14px;
  box-shadow: 0 2px 8px var(--accent-glow);
}
#tutorial-next-btn:hover { opacity: .9; box-shadow: 0 4px 14px var(--accent-glow); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 760px) {
  :root {
    --pile-w: 58px; --pile-h: 82px;
    --card-w: 58px; --card-h: 82px;
    --gap: 6px;
  }
  header { padding: 10px 14px; flex-wrap: wrap; gap: 8px; }
  .logo  { font-size: 1.1rem; }
  .stat-box { padding: 4px 10px; min-width: 60px; }
  .stat-value { font-size: .95rem; }
  .card-rank  { font-size: .7rem; }
  .card-suit  { font-size: .58rem; }
  .card-center { font-size: 2rem; }
  .win-box { padding: 32px 28px; }
}

/* ── Mobile (narrow phones) ───────────────────────────────── */
@media (max-width: 480px) {
  :root {
    --pile-w: 44px; --pile-h: 62px;
    --card-w: 44px; --card-h: 62px;
    --gap: 4px;
  }
  header {
    padding: 6px 8px; gap: 6px;
    justify-content: space-between;
  }
  .logo  { font-size: .95rem; }
  .header-center { gap: 6px; }
  .stat-box { padding: 3px 6px; min-width: 48px; }
  .stat-label { font-size: .52rem; }
  .stat-value { font-size: .8rem; }
  .header-right { gap: 5px; }
  button { padding: 5px 8px; font-size: .72rem; letter-spacing: .02em; }
  #game-area { padding: 10px 6px 8px; }
  .card-rank  { font-size: .58rem; }
  .card-suit  { font-size: .46rem; }
  .card-center { font-size: 1.5rem; }
  .card-corner.top-left  { top: 3px; left: 4px; }
  .card-corner.bot-right { bottom: 3px; right: 4px; }
  .win-box { padding: 28px 20px; }
  .win-box h1 { font-size: 1.8rem; }
  .help-box { padding: 24px 20px 20px; }
}