/* ============ Sliding Puzzle v5 — "Velvet Jackpot" ============
   Midnight Felt (casino table) + Neon Arcade glow layer.
   Dark-only theme. FLIP tile-slide lives in the page script. */
:root{
  --felt-1:#1a5c45; --felt-2:#0d3826; --felt-3:#06251a; --surface:#082016;
  --card:#0b2b1e; --rail:#0a1f16;
  --ink:#f4efe6; --ink-dim:rgba(244,239,230,.55); --ink-faint:rgba(244,239,230,.35);
  --gold:#d4af37; --gold-bright:#f3d47c; --gold-deep:#cfa640;
  --neon:#3dffb0; --neon-soft:rgba(61,255,176,.14);
  --danger:#ff6b6b;
  --tile-face:#fdf6e3; --tile-edge:#ecdfc0; --tile-ink:#0e3b2e;
  --rule:rgba(212,175,55,.35); --rule-soft:rgba(212,175,55,.15);
  --nav-h:48px;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
html{scroll-behavior:smooth}
body{
  font-family:'Playfair Display',Georgia,'Times New Roman',serif;
  background:
    radial-gradient(1100px 700px at 50% -12%, var(--felt-1), var(--felt-2) 55%, var(--felt-3) 100%);
  background-attachment:fixed;
  color:var(--ink);line-height:1.5;font-size:16px;
  min-height:100vh;display:flex;flex-direction:column;position:relative;overflow-x:hidden;
}
/* faint felt texture + vignette */
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(120% 90% at 50% 0%, transparent 55%, rgba(0,0,0,.45) 100%),
    repeating-linear-gradient(45deg, rgba(255,255,255,.012) 0 2px, transparent 2px 4px);}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  background:radial-gradient(600px 380px at 50% 34%, var(--neon-soft), transparent 70%);
  animation:tablebreathe 7s ease-in-out infinite alternate;}
@keyframes tablebreathe{0%{opacity:.35}100%{opacity:.6}}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}
/* ── nav ── */
.globalnav{height:var(--nav-h);position:sticky;top:0;z-index:100;
  background:rgba(6,28,19,.72);-webkit-backdrop-filter:blur(18px) saturate(1.4);backdrop-filter:blur(18px) saturate(1.4);
  border-bottom:1px solid var(--rule-soft)}
.globalnav-content{max-width:1024px;margin:0 auto;padding:0 22px;height:100%;display:flex;align-items:center;gap:14px}
.globalnav-wordmark{font-size:18px;font-weight:700;letter-spacing:.04em;display:flex;align-items:center;gap:9px;white-space:nowrap}
.globalnav-wordmark .g-mark{width:14px;height:14px;border-radius:3px;display:inline-block;
  background:linear-gradient(135deg,var(--gold-bright),var(--gold-deep));
  box-shadow:0 0 10px rgba(212,175,55,.5)}
.globalnav-lab{font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--gold);opacity:.6;margin-left:auto;white-space:nowrap}
/* ── shell ── */
.game-shell{flex:1;display:flex;flex-direction:column;align-items:center;padding:34px 20px 44px;position:relative;z-index:1}
.game-container{width:min(480px,100%);text-align:center;position:relative}
/* ── head ── */
.game-head{margin-bottom:6px}
h1{font-size:clamp(32px,5.5vw,46px);font-weight:700;letter-spacing:.02em;line-height:1.06;
  color:var(--ink);text-shadow:0 2px 22px rgba(0,0,0,.5)}
h1 .gold{color:var(--gold-bright);
  text-shadow:0 0 22px rgba(212,175,55,.55),0 0 52px rgba(212,175,55,.28);
  animation:glowpulse 3.6s ease-in-out infinite alternate}
@keyframes glowpulse{0%{text-shadow:0 0 18px rgba(212,175,55,.45),0 0 44px rgba(212,175,55,.22)}
  100%{text-shadow:0 0 26px rgba(212,175,55,.7),0 0 62px rgba(212,175,55,.4)}}
.tagline{font-style:italic;color:var(--ink-dim);font-size:14px;margin-top:4px}
.goldline{width:130px;height:2px;margin:16px auto 0;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--gold),var(--neon),transparent);
  box-shadow:0 0 12px rgba(212,175,55,.4);position:relative;overflow:visible}
.goldline::after{content:"";position:absolute;top:0;left:-40%;width:40%;height:100%;
  background:linear-gradient(90deg,transparent,#fff8dd,transparent);
  filter:blur(1px);animation:sweep 4.5s ease-in-out infinite}
@keyframes sweep{0%{left:-40%}55%{left:105%}100%{left:105%}}
/* ── stats ── */
.stats{display:flex;gap:14px;justify-content:center;margin:20px 0 22px}
.stat{min-width:112px;padding:10px 20px 11px;text-align:center;border-radius:10px;
  border:1px solid var(--rule);background:rgba(6,37,26,.55);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05),0 4px 16px rgba(0,0,0,.35)}
.stat-label{display:block;font-size:10px;letter-spacing:.3em;text-transform:uppercase;color:var(--ink-faint);font-family:Georgia,serif}
.stat-value{display:block;font-size:25px;font-weight:700;color:var(--gold-bright);font-variant-numeric:tabular-nums;
  text-shadow:0 0 14px rgba(212,175,55,.35)}
/* ── board ── */
.puzzle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;width:min(360px,100%);aspect-ratio:1;
  margin:0 auto 8px;padding:12px;border-radius:16px;
  background:
    radial-gradient(140% 120% at 50% 0%, rgba(61,255,176,.06), transparent 55%),
    rgba(0,0,0,.28);
  border:1px solid var(--rule);
  box-shadow:
    0 0 0 1px rgba(0,0,0,.4),
    0 0 44px rgba(61,255,176,.13),
    0 24px 70px rgba(0,0,0,.55),
    inset 0 0 44px rgba(0,0,0,.5);
  position:relative}
/* corner brass screws on the board frame */
.puzzle-grid::before,.puzzle-grid::after{content:"";position:absolute;width:9px;height:9px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#ffe9a8,var(--gold-deep) 60%,#8a6b1e);
  box-shadow:0 1px 3px rgba(0,0,0,.6),0 0 8px rgba(212,175,55,.35);z-index:2}
.puzzle-grid::before{top:7px;left:7px}
.puzzle-grid::after{bottom:7px;right:7px}
.tile{width:100%;aspect-ratio:1;display:flex;align-items:center;justify-content:center;position:relative;
  font-size:clamp(19px,5vw,27px);font-weight:700;font-family:Georgia,serif;letter-spacing:.01em;
  color:var(--tile-ink);cursor:grab;user-select:none;-webkit-user-select:none;touch-action:none;
  background:linear-gradient(155deg,#fffdf5 0%,var(--tile-face) 45%,var(--tile-edge) 100%);
  border-radius:9px;
  box-shadow:0 4px 12px rgba(0,0,0,.5),inset 0 1px 0 #fff,inset 0 -2px 5px rgba(120,90,40,.28);
  transition:box-shadow .22s ease,filter .18s ease,transform .16s cubic-bezier(.22,1,.36,1)}
.tile::after{content:"";position:absolute;inset:5px;border:1px solid rgba(14,59,46,.22);border-radius:6px;pointer-events:none}
.tile:hover{filter:brightness(1.045);
  box-shadow:0 8px 20px rgba(0,0,0,.55),0 0 20px rgba(212,175,55,.32),0 0 6px rgba(212,175,55,.3),inset 0 1px 0 #fff;
  transform:translateY(-2px)}
.tile:active{cursor:grabbing;transform:translateY(0) scale(.98)}
.tile.pulse{animation:tilepulse .5s ease}
@keyframes tilepulse{0%{box-shadow:0 4px 12px rgba(0,0,0,.5),0 0 0 0 rgba(61,255,176,.55)}
  100%{box-shadow:0 4px 12px rgba(0,0,0,.5),0 0 0 14px rgba(61,255,176,0)}}
.tile.empty{background:rgba(0,0,0,.14);box-shadow:inset 0 2px 10px rgba(0,0,0,.45);cursor:default}
.tile.empty::after{border-color:rgba(212,175,55,.14)}
.tile.empty:hover{transform:none;filter:none;box-shadow:inset 0 2px 10px rgba(0,0,0,.45)}
.tile.dragging{opacity:.55;transform:scale(1.07);z-index:10;
  box-shadow:0 18px 44px rgba(0,0,0,.65),0 0 30px rgba(61,255,176,.28)}
.tile.drag-over{background:#f7e8b5;box-shadow:inset 0 0 0 2px var(--gold),0 0 22px rgba(212,175,55,.5)}
/* ── controls ── */
.controls{margin:24px 0 12px}
.controls button{font-size:13.5px;letter-spacing:.22em;text-transform:uppercase;font-weight:700;color:#0e3b2e;
  background:linear-gradient(180deg,var(--gold-bright),var(--gold-deep));
  border:none;border-radius:999px;padding:14px 36px;cursor:pointer;position:relative;
  box-shadow:0 6px 20px rgba(212,175,55,.35),inset 0 1px 0 rgba(255,255,255,.55),0 0 26px rgba(61,255,176,.12);
  transition:box-shadow .22s ease,transform .14s ease,filter .2s}
.controls button:hover{filter:brightness(1.06);transform:translateY(-1px);
  box-shadow:0 10px 28px rgba(212,175,55,.5),0 0 40px rgba(61,255,176,.22),inset 0 1px 0 rgba(255,255,255,.65)}
.controls button:active{transform:translateY(1px) scale(.985);box-shadow:0 4px 12px rgba(212,175,55,.4)}
/* ── win ── */
.win{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;
  background:rgba(3,17,11,.78);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.win.hidden{display:none}
.win-card{position:relative;width:min(420px,92vw);padding:42px 30px 36px;text-align:center;border-radius:18px;
  background:linear-gradient(180deg,#0d3826,#06251a);
  border:1px solid var(--gold);
  box-shadow:0 30px 90px rgba(0,0,0,.72),0 0 60px rgba(61,255,176,.2),0 0 26px rgba(212,175,55,.22),inset 0 1px 0 rgba(255,255,255,.06);
  animation:winrise .55s cubic-bezier(.22,1,.36,1);overflow:hidden}
@keyframes winrise{0%{transform:translateY(30px) scale(.96);opacity:0}100%{transform:none;opacity:1}}
.win-card::before{content:"";position:absolute;top:0;left:-45%;width:45%;height:2px;
  background:linear-gradient(90deg,transparent,var(--neon),transparent);animation:sweep 2.8s ease-in-out infinite}
.win-card h2{font-size:34px;color:var(--gold-bright);margin-bottom:6px;
  text-shadow:0 0 26px rgba(212,175,55,.6),0 0 60px rgba(212,175,55,.3)}
.win-card p{font-style:italic;color:var(--ink-dim);margin-bottom:22px}
.win-stats{display:flex;justify-content:center;gap:12px;margin-bottom:22px;font-family:Georgia,serif}
.win-stat{padding:9px 18px;border:1px solid var(--rule);border-radius:9px;background:rgba(0,0,0,.3)}
.win-stat b{display:block;font-size:21px;color:var(--neon);font-variant-numeric:tabular-nums;text-shadow:0 0 14px rgba(61,255,176,.5)}
.win-stat span{font-size:9px;letter-spacing:.28em;text-transform:uppercase;color:var(--ink-faint)}
.win-message input{background:rgba(255,255,255,.07);border:1px solid var(--rule);color:var(--ink);
  font-family:Georgia,serif;font-size:16px;letter-spacing:.28em;text-transform:uppercase;
  padding:11px 0 11px 14px;border-radius:9px;margin:0 8px 10px 0;width:9.2ch;outline:none;transition:border-color .2s,box-shadow .2s}
.win-message input:focus{border-color:var(--neon);box-shadow:0 0 14px rgba(61,255,176,.25)}
.win-message input::placeholder{color:var(--ink-faint)}
.win-message button{font-size:13px;letter-spacing:.18em;text-transform:uppercase;font-weight:700;
  background:linear-gradient(180deg,var(--gold-bright),var(--gold-deep));border:none;border-radius:9px;color:#0e3b2e;
  font-weight:700;padding:12px 24px;cursor:pointer;box-shadow:0 0 18px rgba(212,175,55,.3);transition:box-shadow .2s,filter .2s}
.win-message button:hover{filter:brightness(1.07);box-shadow:0 0 30px rgba(212,175,55,.5),0 0 18px rgba(61,255,176,.3)}
/* win burst ring on the card */
.win-card::after{content:"";position:absolute;inset:-2px;border-radius:20px;pointer-events:none;
  border:1px solid rgba(61,255,176,.35);animation:ringbloom 1.1s ease-out .15s both}
@keyframes ringpulse{0%{opacity:.9;transform:scale(.98)}100%{opacity:0;transform:scale(1.12)}}
/* ── leaderboard: rank | name | time table ── */
.leaderboard{width:min(400px,100%);margin-top:10px;text-align:left}
.leaderboard h3{font-size:11px;letter-spacing:.34em;text-transform:uppercase;color:var(--ink-faint);
  border-bottom:1px solid var(--rule-soft);padding-bottom:9px;margin-bottom:2px;display:flex;justify-content:space-between}
.leaderboard h3 em{font-style:normal;color:var(--gold);opacity:.8}
.lb-table{margin-top:6px}
.lb-head{display:grid;grid-template-columns:38px 1fr 78px;gap:10px;
  font-size:9.5px;letter-spacing:.3em;text-transform:uppercase;color:var(--ink-faint);
  padding:7px 4px 6px;border-bottom:1px solid var(--rule-soft);font-family:Georgia,serif}
.lb-head .lb-time-col{text-align:right}
#score-list{list-style:none;counter-reset:rank}
#score-list li{display:grid;grid-template-columns:38px 1fr 78px;gap:10px;align-items:center;
  padding:10px 4px;border-bottom:1px solid rgba(212,175,55,.1);font-size:14.5px;color:#ecdfc0}
#score-list li.board-empty{display:block;font-style:italic;color:var(--ink-faint);font-size:13.5px;border-bottom:none}
.lb-rank{font-variant-numeric:tabular-nums;font-size:12px;color:var(--gold);opacity:.75}
.lb-name{font-weight:700;letter-spacing:.14em;color:#f4efe6}
.lb-time{font-variant-numeric:tabular-nums;text-align:right;color:var(--neon);
  text-shadow:0 0 12px rgba(61,255,176,.35);font-size:15px}
#score-list li.first .lb-rank{color:var(--neon);text-shadow:0 0 10px rgba(61,255,176,.5)}
#score-list li.first .lb-name{color:var(--gold-bright);text-shadow:0 0 14px rgba(212,175,55,.4)}
#score-list li.first .lb-time{text-shadow:0 0 18px rgba(61,255,176,.6)}
.game-footer{margin-top:26px;font-size:12px;color:var(--ink-faint);text-align:center;font-style:italic;position:relative;z-index:1}
@media(max-width:480px){
  .game-shell{padding:24px 14px 34px}
  .stat{min-width:96px}
  .win-card{padding:34px 22px 30px}
}
@media(prefers-reduced-motion:reduce){
  body::after,.goldline::after,.win-card::before{display:none}
}