/* ===========================================================
   Solitaire (Klondike) — styles
   Mobile-first, compatible iOS Safari / Android Chrome & Firefox
   =========================================================== */

:root {
  --bg-1: #eaf6ef;
  --bg-2: #d3ecdd;
  --surface: #ffffff;
  --surface-alt: #f2faf5;
  --text: #142a1e;
  --text-dim: #5c7268;
  --primary: #1f7a4d;
  --primary-dark: #175c3a;
  --primary-contrast: #ffffff;
  --accent: #e0a63c;
  --success: #2fb380;
  --danger: #d13a3a;
  --border: #d7ebe0;
  --shadow: 0 8px 24px rgba(20, 80, 50, 0.14);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --card-w: clamp(38px, 12.6vw, 62px);
  --card-h: calc(var(--card-w) * 1.42);
  --card-gap-up: calc(var(--card-w) * 0.34);
  --card-gap-down: calc(var(--card-w) * 0.16);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-1: #0d1a12; --bg-2: #12241a; --surface: #182a1e; --surface-alt: #1d3124;
    --text: #eaf6ef; --text-dim: #a3bcae; --primary: #4fbf85; --primary-dark: #6fd6a0;
    --primary-contrast: #072012; --accent: #f0bd5a; --success: #4fd6a2; --danger: #ff7a7a;
    --border: #24402f; --shadow: 0 8px 28px rgba(0,0,0,.45);
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% -10%, var(--bg-2), var(--bg-1) 60%);
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
  user-select: none;
}

.page {
  max-width: 620px; margin: 0 auto;
  padding: calc(10px + var(--safe-top)) 8px calc(20px + var(--safe-bottom));
  min-height: 100dvh; display: flex; flex-direction: column;
}

.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; padding: 0 4px; }
.icon-btn {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  width: 40px; height: 40px; font-size: 17px; cursor: pointer; text-decoration: none;
  color: var(--text); display: flex; align-items: center; justify-content: center;
}
.icon-btn:active { transform: scale(0.95); }
.game-stats { display: flex; gap: 8px; }
.stat-pill {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 8px 11px; font-weight: 700; font-size: 13px;
}

.table-toolbar { display: flex; gap: 8px; margin-bottom: 10px; padding: 0 4px; }
.btn { border: none; border-radius: 12px; font-weight: 700; cursor: pointer; transition: transform .08s ease, opacity .15s ease; }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: .4; }
.tool-btn { flex: 1; padding: 10px 6px; font-size: 12.5px; background: var(--surface); color: var(--text-dim); border: 1.5px solid var(--border); }
.btn-primary { background: var(--primary); color: var(--primary-contrast); box-shadow: 0 6px 16px rgba(31,122,77,.35); padding: 15px; font-size: 16px; }
.btn-big { width: 100%; }

.board-row { display: flex; gap: calc(var(--card-w) * 0.08); padding: 0 4px 10px; align-items: flex-start; }
.board-spacer { flex: 1; }
.pile-slot {
  width: var(--card-w); height: var(--card-h); border-radius: calc(var(--card-w) * 0.12);
  border: 1.5px dashed var(--border); position: relative; flex-shrink: 0;
}

.tableau-row { display: flex; gap: calc(var(--card-w) * 0.08); padding: 0 4px; flex: 1; }
.tableau-col { width: var(--card-w); position: relative; min-height: var(--card-h); flex-shrink: 0; }

.card {
  position: absolute; left: 0; top: 0;
  width: var(--card-w); height: var(--card-h); border-radius: calc(var(--card-w) * 0.12);
  background: var(--surface); border: 1.5px solid var(--border); box-shadow: 0 3px 6px rgba(0,0,0,.16);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-weight: 800; cursor: pointer; transition: top .16s ease, box-shadow .12s ease, left .16s ease;
}
.card.red { color: var(--danger); }
.card.black { color: var(--text); }
.card .rank { font-size: clamp(11px, 3.4vw, 16px); line-height: 1; }
.card .suit { font-size: clamp(13px, 4vw, 19px); line-height: 1.1; }
.card.face-down {
  background: repeating-linear-gradient(135deg, var(--primary) 0 6px, var(--primary-dark) 6px 12px);
  border-color: var(--primary-dark);
}
.card.selected { box-shadow: 0 0 0 3px var(--accent), 0 4px 10px rgba(0,0,0,.25); top: calc(var(--card-w) * -0.12); }
.card.shake { animation: shake .3s; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-4px)} 75%{transform:translateX(4px)} }

.foundation .suit-ghost { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: calc(var(--card-w) * 0.5); color: var(--border); pointer-events: none; }

.stock-empty-icon { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: calc(var(--card-w) * 0.42); color: var(--text-dim); }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(10, 20, 14, 0.55);
  display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 50;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--surface); border-radius: 22px; padding: 26px 22px; max-width: 360px; width: 100%;
  text-align: center; box-shadow: var(--shadow);
}
.modal-emoji { font-size: 44px; margin-bottom: 6px; }
.modal h2 { margin: 0 0 8px; }
.modal p { margin: 0 0 18px; color: var(--text-dim); font-size: 14px; line-height: 1.5; }