/* ==========================================================================
   Spider Solitaire — game shell + board styles
   Scoped with .sso-* so the shared site stylesheet can't leak in and we
   can't leak out. Mobile-first, single file, no image assets — every card
   face is CSS + text/glyphs (♠ ♥ ♦ ♣).
   ========================================================================== */

:root {
  --sso-felt-0:      #06231a;
  --sso-felt-1:      #0a3526;
  --sso-felt-2:      #0f4a34;
  --sso-gold:        #e8c25e;
  --sso-gold-soft:   #f4dd9d;
  --sso-mint:        #57d9a3;
  --sso-red:         #ef5a63;
  --sso-ink:         #f3f7f4;
  --sso-ink-dim:     #a9c4b8;
  --sso-panel:       rgba(6, 35, 26, 0.92);
  --sso-panel-line:  rgba(232, 194, 94, 0.22);
  --sso-chip:        rgba(4, 20, 15, 0.55);
  --sso-cell:        rgba(255, 255, 255, 0.06);
  --sso-card-white:  #f8f6ee;
  --sso-card-back-1: #7a1f2b;
  --sso-card-back-2: #4d1119;
  --sso-radius:      16px;
  --sso-font:        'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --sso-safe-t:      env(safe-area-inset-top, 0px);
  --sso-safe-b:      env(safe-area-inset-bottom, 0px);
  --sso-safe-l:      env(safe-area-inset-left, 0px);
  --sso-safe-r:      env(safe-area-inset-right, 0px);

  /* Card geometry — explicit px width/height (not aspect-ratio percentage
     tricks) so the same numbers drive both the card's own shape and the
     stacking overlap below without any width-vs-height ambiguity. */
  --sso-card-w:      clamp(27px, 8.6vw, 42px);
  --sso-card-h:      calc(var(--sso-card-w) * 1.4);
  --sso-peek:        clamp(15px, 4.6vw, 22px);
}

html, body.sso-body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--sso-felt-0);
  color: var(--sso-ink);
  font-family: var(--sso-font);
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

/* --------------------------------------------------------------------------
   Shared site header — visible on the menu/help, hidden during play.
   -------------------------------------------------------------------------- */
.sso-site-header {
  position: relative;
  z-index: 40;
  font-size: 13px;
}
.sso-site-header header {
  padding: 10px calc(16px + var(--sso-safe-r)) 10px calc(16px + var(--sso-safe-l));
  padding-top: calc(10px + var(--sso-safe-t));
  background: rgba(6, 20, 15, .78);
  border-bottom: 1px solid var(--sso-panel-line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.sso-site-header a { color: var(--sso-ink-dim); text-decoration: none; padding: 5px 9px; border-radius: 8px; }
.sso-site-header a:hover { color: var(--sso-ink); background: rgba(255,255,255,.07); }
.sso-site-header a.active { color: var(--sso-gold); background: rgba(232,194,94,.14); }

body:has(.sso-root.is-playing) .sso-site-header,
body:has(.sso-root.is-playing) #footer { display: none; }

.sso-root {
  position: relative;
  min-height: 100vh;
  background:
    radial-gradient(60vw 60vw at 15% -10%, rgba(87, 217, 163, .14), transparent 60%),
    radial-gradient(70vw 70vw at 110% 10%, rgba(232, 194, 94, .12), transparent 60%),
    linear-gradient(180deg, var(--sso-felt-1), var(--sso-felt-0) 60%);
}
.sso-root.is-playing { height: 100vh; overflow: hidden; }

/* --------------------------------------------------------------------------
   Generic dialog-style screens (loading / menu / help / win)
   -------------------------------------------------------------------------- */
.sso-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(20px + var(--sso-safe-t)) calc(16px + var(--sso-safe-r)) calc(20px + var(--sso-safe-b)) calc(16px + var(--sso-safe-l));
  opacity: 0;
  transform: scale(.98);
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
  z-index: 20;
  overflow-y: auto;
}
.sso-screen.is-open { opacity: 1; transform: none; pointer-events: auto; z-index: 30; }

.sso-panel {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--sso-panel);
  border: 1px solid var(--sso-panel-line);
  border-radius: 22px;
  padding: 28px 24px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,.5), 0 0 0 1px rgba(255,255,255,.02) inset;
}
.sso-panel-narrow { max-width: 340px; }
.sso-panel-wide { max-width: 720px; text-align: left; }

.sso-logo {
  margin: 6px 0 4px;
  font-size: 34px;
  font-weight: 800;
  letter-spacing: .3px;
  background: linear-gradient(135deg, var(--sso-gold), var(--sso-mint) 65%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sso-menu-glyphs { font-size: 24px; letter-spacing: 8px; margin-bottom: 4px; color: var(--sso-gold-soft); filter: drop-shadow(0 2px 8px rgba(0,0,0,.4)); }
.sso-tagline { color: var(--sso-ink-dim); margin: 0 0 18px; font-size: 14px; }
.sso-muted { color: var(--sso-ink-dim); }

.sso-progress { width: 100%; height: 8px; border-radius: 8px; background: rgba(255,255,255,.08); overflow: hidden; margin-top: 18px; }
.sso-progress-bar { height: 100%; width: 40%; background: linear-gradient(90deg, var(--sso-gold), var(--sso-mint)); border-radius: 8px; animation: sso-load 1.1s ease-in-out infinite; }
@keyframes sso-load { 0% { transform: translateX(-100%); } 100% { transform: translateX(250%); } }

/* --------------------------------------------------------------------------
   Menu — difficulty picker + record card
   -------------------------------------------------------------------------- */
.sso-difficulty-picker {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 6px 0 14px;
}
.sso-diff-btn {
  appearance: none; cursor: pointer; text-align: left;
  border: 1px solid var(--sso-panel-line);
  background: rgba(255,255,255,.04);
  border-radius: 12px;
  padding: 10px 14px;
  color: var(--sso-ink);
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: background .15s ease, border-color .15s ease, transform .1s ease;
}
.sso-diff-btn:active { transform: scale(.98); }
.sso-diff-btn.is-active {
  background: linear-gradient(135deg, rgba(232,194,94,.18), rgba(87,217,163,.1));
  border-color: var(--sso-gold);
}
.sso-diff-name { font-weight: 700; font-size: 15px; }
.sso-diff-sub { font-size: 12px; color: var(--sso-ink-dim); }

.sso-record-card {
  background: var(--sso-chip);
  border: 1px solid var(--sso-panel-line);
  border-radius: 12px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.sso-record-row { display: flex; justify-content: space-between; font-size: 13px; }
.sso-record-label { color: var(--sso-ink-dim); }
.sso-record-value { font-weight: 700; color: var(--sso-gold-soft); font-variant-numeric: tabular-nums; }

.sso-actions { display: flex; flex-direction: column; gap: 10px; margin: 6px 0 8px; }
.sso-actions-secondary { margin-top: 4px; }
.sso-btn {
  appearance: none; border: none; cursor: pointer;
  padding: 14px 20px; border-radius: 14px; font-size: 16px; font-weight: 700;
  font-family: inherit; color: var(--sso-ink);
  transition: transform .12s ease, filter .12s ease, opacity .12s ease;
}
.sso-btn:active { transform: scale(.97); }
.sso-btn-primary { background: linear-gradient(135deg, var(--sso-mint), #2f9e6e); color: #06231a; box-shadow: 0 10px 24px rgba(87,217,163,.3); }
.sso-btn-primary:hover { filter: brightness(1.06); }
.sso-btn-cash { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); color: var(--sso-ink-dim); }
.sso-btn-cash.is-disabled, .sso-btn-cash:disabled { opacity: .55; cursor: not-allowed; }
.sso-btn-ghost { background: rgba(255,255,255,.05); border: 1px solid var(--sso-panel-line); color: var(--sso-ink); }
.sso-btn-ghost:hover { background: rgba(255,255,255,.09); }

.sso-fineprint { margin-top: 14px; font-size: 11px; color: var(--sso-ink-dim); opacity: .8; line-height: 1.5; }
.sso-version::before { content: 'v' attr(data-v); }

.sso-close {
  position: absolute; top: 14px; right: 14px; width: 34px; height: 34px;
  border-radius: 50%; border: 1px solid var(--sso-panel-line); background: rgba(255,255,255,.06);
  color: var(--sso-ink); font-size: 20px; line-height: 1; cursor: pointer;
}

.sso-h2 { margin: 0 0 14px; font-size: 22px; font-weight: 800; color: var(--sso-ink); }
.sso-h3 { margin: 18px 0 8px; font-size: 15px; color: var(--sso-gold-soft); text-transform: uppercase; letter-spacing: .06em; }
.sso-h3:first-child { margin-top: 0; }
.sso-body { font-size: 14px; line-height: 1.6; color: var(--sso-ink-dim); margin: 0 0 10px; }
.sso-list { margin: 0; padding-left: 18px; color: var(--sso-ink-dim); font-size: 14px; line-height: 1.7; }
.sso-list b, .sso-body b { color: var(--sso-ink); }

.sso-help-cols { display: grid; grid-template-columns: 1fr; gap: 22px; }
@media (min-width: 720px) {
  .sso-help-cols { grid-template-columns: 1fr 1fr; }
}

/* --------------------------------------------------------------------------
   Play screen
   -------------------------------------------------------------------------- */
#screen-play.sso-screen {
  align-items: stretch;
  justify-content: stretch;
  padding: 0;
  display: none;
  background: transparent;
}
#screen-play.sso-screen.is-open { display: flex; opacity: 1; transform: none; }

.sso-play {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: calc(10px + var(--sso-safe-t)) calc(10px + var(--sso-safe-r)) calc(12px + var(--sso-safe-b)) calc(10px + var(--sso-safe-l));
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  overflow-y: auto;
  box-sizing: border-box;
}

.sso-topbar { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.sso-chip {
  display: flex; align-items: baseline; gap: 5px; padding: 7px 10px;
  border-radius: 10px; background: var(--sso-chip); border: 1px solid var(--sso-panel-line);
}
.sso-chip-label { font-size: 10px; text-transform: uppercase; letter-spacing: .06em; color: var(--sso-ink-dim); }
.sso-chip-value { font-size: 15px; font-weight: 800; font-variant-numeric: tabular-nums; }

.sso-icon-btn {
  width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--sso-panel-line);
  background: var(--sso-chip); color: var(--sso-ink); font-size: 15px; cursor: pointer;
  flex: 0 0 auto;
}

.sso-stuck-banner {
  display: flex; align-items: center; justify-content: center;
  padding: 8px; border-radius: 12px; font-size: 13px; font-weight: 600; text-align: center;
  background: linear-gradient(90deg, rgba(239,90,99,.2), rgba(232,194,94,.2));
  border: 1px solid rgba(239,90,99,.4); color: var(--sso-ink);
}
/* Without this the [hidden] attribute is silently beaten by the display:flex
   rule above and the banner would sit there — invisible on paper only,
   still taking a click if something were layered on it. Always pair a
   native [hidden] element with an explicit display:none guard. */
.sso-stuck-banner[hidden] { display: none; }

/* --------------------------------------------------------------------------
   Board: side strip (stock + foundations) + tableau
   -------------------------------------------------------------------------- */
.sso-board {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sso-side-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 8px 10px;
  border-radius: 14px;
  background: linear-gradient(180deg, var(--sso-felt-2), var(--sso-felt-1));
  border: 1px solid var(--sso-panel-line);
}

.sso-stock {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  appearance: none;
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--sso-ink);
  padding: 4px 8px 4px 4px;
  border-radius: 10px;
  flex: 0 0 auto;
}
.sso-stock:disabled { cursor: not-allowed; opacity: .5; }
.sso-stock-card {
  display: block;
  width: var(--sso-card-w);
  height: var(--sso-card-h);
  border-radius: 6px;
  background: repeating-linear-gradient(45deg, var(--sso-card-back-1) 0 6px, var(--sso-card-back-2) 6px 12px);
  border: 2px solid rgba(255,255,255,.22);
  box-shadow: 0 3px 8px rgba(0,0,0,.4);
}
.sso-stock.is-empty .sso-stock-card { opacity: .3; background: rgba(255,255,255,.05); border-style: dashed; }
.sso-stock-count { font-weight: 800; font-size: 16px; font-variant-numeric: tabular-nums; }
.sso-stock-count::after { content: ' deals'; font-weight: 400; font-size: 11px; color: var(--sso-ink-dim); }

.sso-foundations {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  flex: 1;
  justify-content: flex-end;
}
.sso-foundation-slot {
  width: calc(var(--sso-card-w) * 0.72);
  height: calc(var(--sso-card-h) * 0.72);
  border-radius: 5px;
  border: 1.5px dashed rgba(255,255,255,.22);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--sso-card-w) * 0.42);
  color: var(--sso-ink-dim);
}
.sso-foundation-slot.is-filled {
  border-style: solid;
  border-color: var(--sso-gold);
  background: var(--sso-card-white);
  box-shadow: 0 2px 6px rgba(0,0,0,.35);
}
.sso-foundation-slot.sso-red { color: var(--sso-red); }
.sso-foundation-slot.sso-black { color: #1a1a1a; }

/* --------------------------------------------------------------------------
   Tableau
   -------------------------------------------------------------------------- */
.sso-tableau-scroll {
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
}
.sso-tableau {
  display: grid;
  grid-template-columns: repeat(10, var(--sso-card-w));
  gap: 4px;
  min-width: max-content;
  padding: 2px;
}
.sso-column {
  display: flex;
  flex-direction: column;
  min-height: var(--sso-card-h);
  border-radius: 6px;
}
.sso-column:empty {
  border: 1.5px dashed rgba(255,255,255,.18);
  box-sizing: border-box;
}
.sso-column.is-hint-to {
  outline: 2px solid var(--sso-mint);
  outline-offset: 2px;
  border-radius: 8px;
}

.sso-card {
  position: relative;
  width: var(--sso-card-w);
  height: var(--sso-card-h);
  border-radius: 6px;
  box-sizing: border-box;
  cursor: pointer;
  background: var(--sso-card-white);
  box-shadow: 0 2px 5px rgba(0,0,0,.35);
  transition: transform .1s ease, box-shadow .15s ease;
}
.sso-card:not(:first-child) {
  margin-top: calc(-1 * (var(--sso-card-h) - var(--sso-peek)));
}
.sso-card.is-facedown {
  background: repeating-linear-gradient(45deg, var(--sso-card-back-1) 0 5px, var(--sso-card-back-2) 5px 10px);
  border: 1.5px solid rgba(255,255,255,.2);
  cursor: default;
}
.sso-card.is-selected {
  transform: translateY(-6px);
  box-shadow: 0 6px 14px rgba(232,194,94,.5), 0 0 0 2px var(--sso-gold);
  z-index: 5;
}
.sso-card.is-hint-from {
  box-shadow: 0 0 0 2px var(--sso-mint), 0 4px 10px rgba(87,217,163,.5);
  animation: sso-hint-pulse 1s ease-in-out infinite;
}
@keyframes sso-hint-pulse { 0%, 100% { filter: brightness(1); } 50% { filter: brightness(1.15); } }

.sso-card.sso-red { color: var(--sso-red); }
.sso-card:not(.is-facedown):not(.sso-red) { color: #1a1a1a; }

.sso-card-corner {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
  font-weight: 800;
  font-size: clamp(8px, 2.6vw, 11px);
}
.sso-card-corner-tl { top: 3px; left: 3px; }
.sso-card-corner-br { bottom: 3px; right: 3px; transform: rotate(180deg); }
.sso-card-suit { font-size: 0.9em; }
.sso-card-pip {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(12px, 4.4vw, 18px);
  opacity: .85;
}

@keyframes sso-flash-invalid {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}
.sso-flash-invalid { animation: sso-flash-invalid .32s ease; }

/* --------------------------------------------------------------------------
   Controls row
   -------------------------------------------------------------------------- */
.sso-controls-row {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.sso-ctrl-btn {
  appearance: none; cursor: pointer;
  border: 1px solid var(--sso-panel-line);
  background: var(--sso-chip);
  color: var(--sso-ink);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  flex: 1;
  max-width: 160px;
}
.sso-ctrl-btn:disabled { opacity: .4; cursor: not-allowed; }
.sso-ctrl-btn:active { transform: scale(.97); }

/* --------------------------------------------------------------------------
   Win celebration
   -------------------------------------------------------------------------- */
.sso-win-celebrate {
  text-align: center;
  max-width: 380px;
  padding: 30px 26px;
  background: var(--sso-panel);
  border: 1px solid var(--sso-panel-line);
  border-radius: 22px;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.sso-win-glyphs { font-size: 26px; letter-spacing: 10px; color: var(--sso-gold-soft); margin-bottom: 6px; }
.sso-win-title { font-size: 26px; font-weight: 800; margin: 4px 0 18px; color: var(--sso-mint); }
.sso-win-stats { display: flex; justify-content: center; gap: 22px; margin-bottom: 10px; }
.sso-win-stat { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.sso-win-stat-label { font-size: 11px; color: var(--sso-ink-dim); text-transform: uppercase; letter-spacing: .05em; }
.sso-win-stat-value { font-size: 20px; font-weight: 800; color: var(--sso-gold-soft); font-variant-numeric: tabular-nums; }
.sso-win-record { min-height: 18px; font-size: 13px; font-weight: 700; color: var(--sso-mint); margin: 4px 0 10px; }

/* --------------------------------------------------------------------------
   Small screens
   -------------------------------------------------------------------------- */
@media (max-width: 380px) {
  .sso-chip-label { display: none; }
  .sso-ctrl-btn { padding: 9px 8px; font-size: 12px; }
}