/* ==========================================================================
   Spider Solitaire — stylesheet
   MIT License
   ========================================================================== */

:root {
  --gold: #e9cb84;
  --gold-deep: #b8903f;
  --felt-1: #14543d;
  --felt-2: #07211a;
  --card-w: 72px;
  --card-h: 102px;
  --radius: 7px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --red: #c22a3f;
  --black: #1d232c;
  --glass: rgba(255, 255, 255, .07);
  --glass-line: rgba(255, 255, 255, .15);
  --shadow-card: 0 2px 4px rgba(0, 0, 0, .28), 0 6px 14px rgba(0, 0, 0, .16);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #eaf4ee;
  background:
    radial-gradient(120% 90% at 50% -10%, #1a6248 0%, #0e3d2d 42%, #07211a 100%) fixed,
    #07211a;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* felt grain + vignette */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: .30;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(110% 75% at 50% 42%, transparent 45%, rgba(0, 0, 0, .42) 100%);
}

.app {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}

/* --------------------------------------------------------------- topbar -- */

.topbar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px clamp(10px, 2vw, 24px) 8px;
  flex: 0 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  font-size: 21px;
  color: #2a2005;
  background: linear-gradient(160deg, #f6e2ac, #cda453 60%, #a8813a);
  box-shadow: 0 2px 0 rgba(255, 255, 255, .45) inset, 0 6px 16px rgba(0, 0, 0, .35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-size: 17px;
  letter-spacing: .12em;
  color: #f6f1e2;
}

.brand-text small {
  font-size: 8.5px;
  letter-spacing: .26em;
  color: rgba(233, 203, 132, .68);
  margin-top: 3px;
}

.stats {
  display: flex;
  gap: clamp(6px, 1.4vw, 20px);
  margin: 0;
  flex: 1 1 auto;
  justify-content: center;
  min-width: 0;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  min-width: 42px;
}

.stat dt {
  font-size: 9.5px;
  letter-spacing: .18em;
  color: rgba(220, 240, 230, .52);
  text-transform: uppercase;
}

.stat dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-size: clamp(13px, 1.5vw, 16px);
  font-weight: 600;
  color: #f2ead4;
  letter-spacing: .04em;
}

.actions {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn {
  font: inherit;
  font-size: 12.5px;
  font-weight: 500;
  color: #e6f2ea;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--glass-line);
  background: var(--glass);
  cursor: pointer;
  transition: transform .16s var(--ease), background .16s, border-color .16s, box-shadow .16s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  white-space: nowrap;
}

.btn:hover { background: rgba(255, 255, 255, .15); transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(.97); }
.btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

.btn.primary {
  color: #2b1f04;
  font-weight: 700;
  border-color: rgba(255, 255, 255, .42);
  background: linear-gradient(180deg, #f3dda2, #d8b05f);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .3), 0 1px 0 rgba(255, 255, 255, .5) inset;
}

.btn.primary:hover { background: linear-gradient(180deg, #fbe9b6, #e2bc6d); }

.btn.icon {
  width: 33px;
  padding: 7px 0;
  justify-content: center;
  font-size: 14px;
}

.btn.icon[aria-pressed="false"] { color: rgba(230, 242, 234, .38); }

.btn:disabled {
  opacity: .4;
  cursor: not-allowed;
  transform: none !important;
  background: var(--glass);
  color: rgba(230, 242, 234, .6);
}

kbd {
  font: inherit;
  font-size: 9px;
  padding: 1px 4px;
  border-radius: 4px;
  color: rgba(255, 255, 255, .55);
  background: rgba(0, 0, 0, .28);
  border: 1px solid rgba(255, 255, 255, .12);
}

.btn.primary kbd { color: rgba(43, 31, 4, .7); background: rgba(255, 255, 255, .3); border-color: rgba(0, 0, 0, .1); }

/* ---------------------------------------------------------------- stage -- */

.stage {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  touch-action: none;
}

.column {
  position: absolute;
  border-radius: calc(var(--radius) + 3px);
  transition: background .2s, box-shadow .2s;
}

.column::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: var(--chip-h, 100%);
  border-radius: var(--radius);
  border: 1.5px dashed rgba(255, 255, 255, .13);
  background: rgba(255, 255, 255, .028);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .05) inset;
  transition: border-color .2s, background .2s, box-shadow .2s;
}

.column.drop::before {
  border-color: rgba(233, 203, 132, .85);
  background: rgba(233, 203, 132, .13);
  box-shadow: 0 0 22px rgba(233, 203, 132, .22) inset, 0 0 12px rgba(233, 203, 132, .16);
}

.column.hint::before {
  border-color: rgba(140, 224, 255, .8);
  background: rgba(140, 224, 255, .12);
  box-shadow: 0 0 20px rgba(140, 224, 255, .25) inset;
  animation: hint-pulse 1s ease-in-out infinite;
}

@keyframes hint-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .45; }
}

.dock {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  border-top: 1px solid rgba(255, 255, 255, .07);
  background: linear-gradient(180deg, rgba(0, 0, 0, .10), rgba(0, 0, 0, .26));
}

.dock-label {
  position: absolute;
  bottom: 3px;
  font-size: 9px;
  letter-spacing: .18em;
  color: rgba(220, 240, 230, .38);
}

.done-label { left: 12px; }
.stock-label { right: 12px; }

.card-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* ----------------------------------------------------------------- card -- */

.card {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--card-w);
  height: var(--card-h);
  pointer-events: auto;
  perspective: 900px;
  transition: transform .3s var(--ease);
  will-change: transform;
  cursor: pointer;
}

.card .flipper {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transition: transform .32s var(--ease);
}

.card.down .flipper { transform: rotateY(180deg); }

.face {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
}

.front {
  background: linear-gradient(168deg, #fffefb 0%, #f8f3e8 62%, #efe7d6 100%);
  border: 1px solid rgba(0, 0, 0, .22);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .95) inset, var(--shadow-card);
}

.back {
  transform: rotateY(180deg);
  border: 1px solid rgba(255, 255, 255, .22);
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, .055) 0 5px, rgba(255, 255, 255, 0) 5px 10px),
    radial-gradient(circle at 50% 22%, #2f7ba8 0%, #17527b 42%, #0d3350 78%, #08243a 100%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .3) inset, var(--shadow-card);
}

.back::before {
  content: "";
  position: absolute;
  inset: 7%;
  border-radius: calc(var(--radius) * .7);
  border: 1px solid rgba(255, 255, 255, .3);
}

.back::after {
  content: "\2660";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: calc(var(--card-w) * .42);
  color: rgba(255, 255, 255, .22);
  text-shadow: 0 1px 2px rgba(0, 0, 0, .35);
}

.card.dragging {
  transition: none !important;
  cursor: grabbing;
  z-index: 9000 !important;
}

.card.dragging .front {
  box-shadow: 0 18px 34px rgba(0, 0, 0, .45), 0 0 0 1px rgba(233, 203, 132, .5);
}

.card.sel .front {
  box-shadow: 0 0 0 2px var(--gold), 0 10px 20px rgba(0, 0, 0, .35);
}

.card.hint-src .front {
  box-shadow: 0 0 0 2px #7fd8ff, 0 0 18px rgba(127, 216, 255, .55);
}

.card.hint-dst .front {
  box-shadow: 0 0 0 2px #7fd8ff, 0 0 22px rgba(127, 216, 255, .45);
}

.card.leaving {
  opacity: 0;
  transition: opacity .35s ease, transform .35s var(--ease);
}

/* card face details */
.corner {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: .92;
  font-weight: 700;
  font-size: calc(var(--card-w) * .235);
  letter-spacing: -.02em;
}

.corner .s {
  font-size: calc(var(--card-w) * .205);
  margin-top: calc(var(--card-w) * .015);
  font-weight: 400;
}

.corner.tl { left: 6.5%; top: 4.5%; }
.corner.br { right: 6.5%; bottom: 4.5%; transform: rotate(180deg); }

.front.red { color: var(--red); }
.front.black { color: var(--black); }

.pips {
  position: absolute;
  inset: 11% 15%;
}

.pip {
  position: absolute;
  transform: translate(-50%, -50%);
  font-style: normal;
  font-size: calc(var(--card-w) * .16);
  line-height: 1;
}

.pips.ace .pip { font-size: calc(var(--card-w) * .52); }

.court {
  position: absolute;
  inset: 12% 13%;
  border-radius: 3px;
  border: 1px solid rgba(0, 0, 0, .13);
  background:
    linear-gradient(135deg, rgba(0, 0, 0, .04), rgba(0, 0, 0, .0) 45%, rgba(0, 0, 0, .05)),
    repeating-linear-gradient(45deg, rgba(0, 0, 0, .022) 0 3px, transparent 3px 6px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1%;
  font-weight: 700;
}

.court .letter { font-size: calc(var(--card-w) * .38); line-height: 1; letter-spacing: .02em; }
.court .sym { font-size: calc(var(--card-w) * .19); line-height: 1; opacity: .9; }
.court .sym.flip { transform: rotate(180deg); }

/* --------------------------------------------------------------- toast -- */

.toast {
  position: absolute;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%) scale(.94);
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 13.5px;
  letter-spacing: .04em;
  color: #2b1f04;
  background: linear-gradient(180deg, #f7e6b6, #dcc07a);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .4);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s var(--ease);
  z-index: 9500;
  max-width: 80vw;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* ------------------------------------------------------------ bottombar -- */

.bottombar {
  flex: 0 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px clamp(10px, 2vw, 24px) 8px;
  font-size: 11px;
  color: rgba(220, 240, 230, .42);
  letter-spacing: .04em;
}

.signature { white-space: nowrap; opacity: .75; }

/* --------------------------------------------------------------- modals -- */

.modal {
  border: none;
  margin: auto;
  padding: 0;
  border-radius: 18px;
  background: linear-gradient(165deg, #12352a, #0a2119 70%);
  color: #eaf4ee;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .6), 0 0 0 1px rgba(255, 255, 255, .1) inset;
  max-width: min(520px, calc(100vw - 32px));
  width: 100%;
  overflow: visible;
}

.modal::backdrop {
  background: rgba(3, 14, 11, .68);
  backdrop-filter: blur(4px);
}

.modal-body {
  padding: clamp(20px, 4vw, 30px);
  position: relative;
}

.modal h2 {
  margin: 0 0 6px;
  font-size: 20px;
  letter-spacing: .06em;
  color: #f7eed8;
}

.modal .muted { color: rgba(220, 240, 230, .55); font-size: 12.5px; line-height: 1.65; margin: 0 0 18px; }
.modal .muted.small { font-size: 11.5px; margin: 16px 0 0; }

.difficulty {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.diff {
  font: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 6px 13px;
  border-radius: 13px;
  color: #eaf4ee;
  border: 1px solid rgba(255, 255, 255, .13);
  background: rgba(255, 255, 255, .05);
  transition: .18s var(--ease);
}

.diff:hover { transform: translateY(-2px); border-color: rgba(233, 203, 132, .55); background: rgba(233, 203, 132, .1); }
.diff:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.diff[aria-current="true"] { border-color: var(--gold); box-shadow: 0 0 0 1px var(--gold) inset; }

.diff-suits { font-size: 20px; line-height: 1; display: flex; gap: 2px; color: #f3ecd9; }
.diff-suits b { font-weight: 400; }
.diff-suits .red, .diff-suits b.red { color: #ef6b7f; }
.diff strong { font-size: 13px; font-weight: 600; }
.diff em { font-style: normal; font-size: 10px; letter-spacing: .12em; color: rgba(233, 203, 132, .72); }

.rules { margin: 0 0 20px; padding-left: 20px; font-size: 12.5px; line-height: 1.9; color: rgba(226, 242, 233, .82); }
.rules li { margin-bottom: 4px; }
.rules b { color: var(--gold); font-weight: 600; }

.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* win dialog */
.win-body { text-align: center; }

.win-badge {
  width: 64px;
  height: 64px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
  font-size: 32px;
  color: #2a2005;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 25%, #fff3cf, #e3bd6c 55%, #b08a3c);
  box-shadow: 0 0 0 6px rgba(233, 203, 132, .16), 0 14px 34px rgba(0, 0, 0, .45);
  animation: badge-pop .6s var(--ease) both;
}

@keyframes badge-pop {
  from { transform: scale(.4) rotate(-18deg); opacity: 0; }
  to { transform: scale(1) rotate(0); opacity: 1; }
}

.win-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 18px 0 0;
}

.win-stats div {
  padding: 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .08);
}

.win-stats dt { font-size: 9.5px; letter-spacing: .18em; color: rgba(220, 240, 230, .5); }
.win-stats dd { margin: 4px 0 0; font-size: 17px; font-weight: 600; color: #f7eed8; font-variant-numeric: tabular-nums; }

.confetti { position: absolute; inset: -20px; pointer-events: none; overflow: hidden; }

.confetti i {
  position: absolute;
  top: -14px;
  width: 7px;
  height: 12px;
  border-radius: 2px;
  opacity: 0;
  animation: fall var(--dur, 2.4s) linear var(--delay, 0s) forwards;
}

@keyframes fall {
  0% { opacity: 1; transform: translate3d(0, -10px, 0) rotate(0); }
  100% { opacity: 0; transform: translate3d(var(--drift, 0px), 460px, 0) rotate(var(--spin, 540deg)); }
}

/* ----------------------------------------------------------- responsive -- */

@media (max-width: 900px) {
  .topbar { flex-wrap: wrap; gap: 8px 14px; padding-bottom: 6px; }
  .brand-text small { display: none; }
  .stats { order: 3; width: 100%; flex: 1 0 100%; justify-content: space-between; padding: 0 2px; }
  .actions { margin-left: auto; }
  .stat { flex-direction: row; gap: 6px; align-items: baseline; }
  .stat dt { font-size: 9px; }
  .bottombar .signature { display: none; }
  .hintbar { text-align: center; width: 100%; }
}

@media (max-width: 620px) {
  .btn kbd { display: none; }
  .btn { padding: 6px 10px; font-size: 11.5px; }
  .brand-text strong { font-size: 15px; }
  .brand-mark { width: 32px; height: 32px; font-size: 18px; }
  .bottombar { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .card, .card .flipper, .btn, .toast { transition-duration: .01ms !important; }
  .confetti, .win-badge { animation: none !important; }
}