/* =========================================================
   2048 Battle — showcase site
   Palette pulled straight from the app's Theme.cs
   ========================================================= */
:root{
  /* Surfaces */
  --bg:#12141C;
  --bg-2:#0d0f16;
  --board:#1E2230;
  --cell:#2A2F42;
  --chip:#242A3D;
  --panel:#191C28;

  /* Accent + text */
  --accent:#28E0C8;
  --text:#EAF2FF;
  --dim:#8A94B0;
  --on-dark:#0C1622;

  /* Tile ramp (cool teal -> hot gold) */
  --t2:#2BC7B4;  --t4:#22B2D6;  --t8:#2E86FF;  --t16:#5B6BFF;
  --t32:#8A5CFF; --t64:#B14BFF; --t128:#E04FD1; --t256:#FF4FA3;
  --t512:#FF7A3C; --t1024:#FFB020; --t2048:#FFD84D;

  --maxw:1120px;
  --radius:22px;
  --font-display:"Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body:"Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 78% -8%, rgba(138,92,255,.16), transparent 60%),
    radial-gradient(1000px 620px at 6% 10%, rgba(40,224,200,.14), transparent 58%),
    radial-gradient(1100px 800px at 60% 116%, rgba(255,79,163,.12), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--font-display);margin:0;line-height:1.05;letter-spacing:-.02em}

/* ---- Ambient glow orbs ---- */
.glow-field{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5;animation:float 18s ease-in-out infinite}
.orb-teal{width:420px;height:420px;background:#28E0C8;top:-120px;left:-100px}
.orb-purple{width:520px;height:520px;background:#8A5CFF;top:24%;right:-160px;animation-delay:-6s}
.orb-pink{width:460px;height:460px;background:#FF4FA3;bottom:-180px;left:28%;animation-delay:-11s}
@keyframes float{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(0,-38px,0)}}

/* =========================================================
   Nav
   ========================================================= */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  max-width:var(--maxw);margin:0 auto;padding:16px 22px;
}
.nav::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg, rgba(18,20,28,.72), rgba(18,20,28,0));
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  -webkit-mask:linear-gradient(180deg,#000 55%,transparent);mask:linear-gradient(180deg,#000 55%,transparent);
}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-weight:600}
.brand-icon{width:34px;height:34px;border-radius:9px;box-shadow:0 0 0 1px rgba(255,255,255,.08), 0 6px 18px rgba(40,224,200,.18)}
.brand-name{font-size:1.02rem;letter-spacing:.02em;color:var(--text)}
.brand-name b{color:var(--accent);font-weight:700}
.nav-cta{
  font-family:var(--font-display);font-weight:600;font-size:.92rem;
  padding:9px 18px;border-radius:999px;
  color:var(--on-dark);background:var(--accent);
  box-shadow:0 6px 20px rgba(40,224,200,.28);
  transition:transform .15s ease, box-shadow .15s ease;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(40,224,200,.4)}

/* =========================================================
   Hero
   ========================================================= */
.hero{
  max-width:var(--maxw);margin:0 auto;
  padding:48px 22px 40px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;
}
.eyebrow{
  display:inline-block;font-family:var(--font-display);font-weight:600;
  font-size:.76rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent);
  padding:7px 14px;border-radius:999px;
  background:rgba(40,224,200,.08);border:1px solid rgba(40,224,200,.24);
  margin-bottom:22px;
}
.hero-title{font-size:clamp(2.6rem,6vw,4.3rem);font-weight:700}
.grad-text{
  background:linear-gradient(96deg,#28E0C8,#8A5CFF 45%,#FF4FA3 72%,#FFD84D);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 4px 26px rgba(138,92,255,.35));
}
.hero-sub{
  margin:22px 0 30px;max-width:33em;
  font-size:clamp(1rem,1.4vw,1.16rem);line-height:1.6;color:var(--dim);
}
.hero-sub b{color:var(--text);font-weight:600}
.fineprint{margin:18px 0 0;font-size:.86rem;color:var(--dim)}

/* Store badges */
.stores{display:flex;flex-wrap:wrap;gap:14px}
.stores-center{justify-content:center}
.store-badge{
  display:inline-flex;align-items:center;gap:11px;
  padding:11px 18px;min-width:186px;
  border-radius:14px;
  background:#05070c;color:#fff;
  border:1px solid rgba(255,255,255,.14);
  transition:transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.store-badge:hover{transform:translateY(-3px);border-color:rgba(255,255,255,.3);box-shadow:0 14px 32px rgba(0,0,0,.45)}
.store-icon{width:26px;height:26px;flex:none}
.store-text{display:flex;flex-direction:column;line-height:1.15}
.store-text small{font-size:.66rem;letter-spacing:.02em;color:#c8cede}
.store-text strong{font-family:var(--font-display);font-size:1.06rem;font-weight:600}

/* =========================================================
   Phone frame
   ========================================================= */
.hero-phone{position:relative;display:flex;justify-content:center}
.phone{
  position:relative;width:300px;aspect-ratio:9/19.3;
  border-radius:44px;padding:11px;
  background:linear-gradient(160deg,#2b3040,#14161f);
  box-shadow:
    0 0 0 2px rgba(255,255,255,.05),
    0 40px 80px -24px rgba(0,0,0,.7),
    0 0 60px -12px rgba(40,224,200,.22);
}
.phone-sm{width:240px}
.phone-notch{
  position:absolute;top:16px;left:50%;transform:translateX(-50%);
  width:96px;height:26px;border-radius:0 0 16px 16px;background:#0b0d14;z-index:3;
}
.phone-sm .phone-notch{width:74px;height:20px}
.screen{
  position:relative;height:100%;width:100%;border-radius:34px;overflow:hidden;
  background:var(--bg);
  display:flex;flex-direction:column;
  padding:34px 14px 16px;
}
.phone-sm .screen{border-radius:30px;padding:30px 12px 14px}
.phone-shadow{
  position:absolute;bottom:-30px;left:50%;transform:translateX(-50%);
  width:230px;height:40px;border-radius:50%;
  background:radial-gradient(ellipse,rgba(0,0,0,.55),transparent 70%);filter:blur(6px);
}

/* =========================================================
   Battle screen
   ========================================================= */
.screen-battle{gap:10px}
.battle-top{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 4px;font-family:var(--font-display);font-weight:600;
}
.pos-badge{
  font-size:.8rem;color:var(--on-dark);background:var(--accent);
  padding:3px 9px;border-radius:8px;box-shadow:0 4px 12px rgba(40,224,200,.35);
}
.pos-badge sup{font-size:.6em}
.goal-pill{
  font-size:.74rem;letter-spacing:.06em;color:var(--t2048);
  padding:3px 10px;border-radius:999px;
  background:rgba(255,216,77,.1);border:1px solid rgba(255,216,77,.3);
}
.timer{font-size:.86rem;color:var(--text);font-variant-numeric:tabular-nums}

.roster{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.chip{
  display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:6px 3px;border-radius:11px;
  background:var(--chip);border:1px solid rgba(255,255,255,.05);
}
.chip-you{border-color:rgba(40,224,200,.55);box-shadow:0 0 0 1px rgba(40,224,200,.35),0 0 16px rgba(40,224,200,.18);animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 1px rgba(40,224,200,.3),0 0 12px rgba(40,224,200,.14)}50%{box-shadow:0 0 0 1px rgba(40,224,200,.6),0 0 20px rgba(40,224,200,.32)}}
.chip-dot{width:8px;height:8px;border-radius:50%;background:var(--c);box-shadow:0 0 8px var(--c)}
.chip-name{font-size:.56rem;font-weight:700;letter-spacing:.05em;color:var(--dim)}
.chip-you .chip-name{color:var(--accent)}
.chip-tile{font-family:var(--font-display);font-size:.72rem;font-weight:700;color:var(--c)}

/* Board */
.board{
  container-type:inline-size;
  background:var(--board);border-radius:16px;padding:9px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:8px;
  box-shadow:inset 0 2px 12px rgba(0,0,0,.35);
}
.tile{
  aspect-ratio:1;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:700;color:var(--text);
  font-size:9cqw;line-height:1;
  box-shadow:0 3px 0 rgba(0,0,0,.18), inset 0 1px 0 rgba(255,255,255,.14);
}
.tile.empty{background:var(--cell);box-shadow:inset 0 2px 6px rgba(0,0,0,.25)}
.t2{background:var(--t2);color:var(--on-dark)}
.t4{background:var(--t4);color:var(--on-dark)}
.t8{background:var(--t8)}
.t16{background:var(--t16)}
.t32{background:var(--t32)}
.t64{background:var(--t64)}
.t128{background:var(--t128);font-size:7cqw}
.t256{background:var(--t256);font-size:7cqw}
.t512{background:var(--t512);font-size:7cqw}
.t1024{background:var(--t1024);color:var(--on-dark);font-size:5.6cqw;box-shadow:0 3px 0 rgba(0,0,0,.18),inset 0 1px 0 rgba(255,255,255,.2),0 0 18px rgba(255,176,32,.5)}
.t2048{background:var(--t2048);color:var(--on-dark);font-size:5.6cqw}
.battle-hint{margin-top:auto;text-align:center;font-size:.66rem;color:var(--dim);letter-spacing:.03em}

/* =========================================================
   Features
   ========================================================= */
.features{max-width:var(--maxw);margin:0 auto;padding:70px 22px 20px}
.section-head{text-align:center;margin-bottom:44px}
.section-head h2{font-size:clamp(1.9rem,3.6vw,2.7rem)}
.section-head p{margin:14px 0 0;color:var(--dim);font-size:1.05rem}
.section-head p b{color:var(--text);font-weight:600}

.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feature{
  position:relative;padding:26px 22px 24px;border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
  border:1px solid rgba(255,255,255,.08);
  overflow:hidden;transition:transform .2s ease, border-color .2s ease;
}
.feature::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:var(--accent);opacity:.9;
  box-shadow:0 0 20px var(--accent);
}
.feature:hover{transform:translateY(-5px);border-color:rgba(255,255,255,.18)}
.feature-mark{
  width:56px;height:56px;border-radius:15px;margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;
  background:color-mix(in srgb, var(--accent) 14%, transparent);
  border:1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}
.feature h3{font-size:1.18rem;margin-bottom:9px}
.feature p{margin:0;color:var(--dim);font-size:.94rem;line-height:1.55}
.mini-tile{
  font-family:var(--font-display);font-weight:700;font-size:.78rem;
  color:var(--t,#fff);background:var(--c);color:var(--t);
  padding:7px 9px;border-radius:9px;min-width:34px;text-align:center;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.2);
}
.dot-row{display:flex;gap:6px}
.dot-row i{width:11px;height:11px;border-radius:50%}
.dot-row i:nth-child(1){background:#28E0C8;box-shadow:0 0 8px #28E0C8}
.dot-row i:nth-child(2){background:#FF7A3C;box-shadow:0 0 8px #FF7A3C}
.dot-row i:nth-child(3){background:#FF4FA3;box-shadow:0 0 8px #FF4FA3}
.dot-row i:nth-child(4){background:#8A5CFF;box-shadow:0 0 8px #8A5CFF}
.bolt{font-size:1.7rem;filter:drop-shadow(0 0 10px rgba(255,176,32,.6))}

/* =========================================================
   Showcase
   ========================================================= */
.showcase{max-width:var(--maxw);margin:0 auto;padding:70px 22px 30px}
.showcase-row{display:flex;justify-content:center;gap:34px;flex-wrap:wrap}
.showcase-item{margin:0;display:flex;flex-direction:column;align-items:center;gap:16px}
.showcase-item figcaption{color:var(--dim);font-size:.92rem;font-weight:500}

/* Menu screen */
.screen-menu{align-items:center;justify-content:center;gap:0}
.menu-logo{width:88%;margin:6px auto 26px;filter:drop-shadow(0 6px 26px rgba(40,224,200,.25))}
.menu-buttons{display:flex;flex-direction:column;gap:12px;width:100%;padding:0 4px}
.mbtn{
  font-family:var(--font-display);font-weight:700;font-size:.9rem;letter-spacing:.03em;
  text-align:center;padding:15px 10px;border-radius:15px;
  box-shadow:0 5px 0 rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.18);
}
.mbtn-accent{background:var(--accent);color:var(--on-dark)}
.mbtn-blue{background:var(--t8);color:var(--text)}
.mbtn-gold{background:var(--t1024);color:var(--on-dark)}
.menu-foot{margin-top:26px;text-align:center;font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}

/* Room screen */
.screen-room{align-items:center;text-align:center;gap:0}
.room-title{font-family:var(--font-display);font-weight:700;font-size:1.1rem;letter-spacing:.14em;color:var(--text);margin-top:6px}
.room-code{
  font-family:var(--font-display);font-weight:700;font-size:2.9rem;letter-spacing:.14em;
  color:var(--accent);margin:8px 0 2px;text-shadow:0 0 26px rgba(40,224,200,.4);
}
.room-status{font-size:.8rem;color:var(--dim);margin-bottom:18px}
.room-list{display:flex;flex-direction:column;gap:8px;width:100%;padding:0 6px}
.room-player{
  display:flex;align-items:center;gap:9px;
  padding:11px 13px;border-radius:12px;font-size:.82rem;font-weight:500;
  background:var(--chip);border:1px solid rgba(255,255,255,.05);color:var(--text);
}
.room-player i{width:9px;height:9px;border-radius:50%;background:var(--c,#3a4157);box-shadow:0 0 8px var(--c,transparent)}
.room-player b.ready{margin-left:auto;font-size:.64rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.room-player.empty-slot{color:var(--dim);border-style:dashed;border-color:rgba(255,255,255,.12);background:transparent}
.room-cta{
  margin-top:auto;width:100%;text-align:center;
  font-family:var(--font-display);font-weight:700;letter-spacing:.08em;
  padding:14px;border-radius:15px;background:var(--accent);color:var(--on-dark);
  box-shadow:0 5px 0 rgba(0,0,0,.22);
}

/* Leaderboard screen */
.screen-lb{align-items:center;gap:0}
.lb-title{font-family:var(--font-display);font-weight:700;font-size:1.12rem;letter-spacing:.1em;color:var(--accent);margin-top:6px;text-shadow:0 0 20px rgba(40,224,200,.35)}
.lb-sub{font-size:.78rem;color:var(--dim);margin:4px 0 20px}
.lb-list{display:flex;flex-direction:column;gap:9px;width:100%;padding:0 6px}
.lb-row{
  display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:12px;font-size:.88rem;font-weight:500;
  background:var(--chip);border:1px solid rgba(255,255,255,.05);color:var(--text);
}
.lb-row em{margin-left:auto;font-style:normal;font-family:var(--font-display);font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums}
.lb-row .rank{font-family:var(--font-display);font-weight:700;width:24px;height:24px;border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:.78rem;background:#31374d;color:var(--dim)}
.rank.r1{background:var(--t1024);color:var(--on-dark)}
.rank.r2{background:#c7cede;color:var(--on-dark)}
.rank.r3{background:var(--t512);color:var(--on-dark)}
.lb-row.me{border-color:rgba(40,224,200,.5);box-shadow:0 0 0 1px rgba(40,224,200,.3)}
.lb-row.me em{color:var(--accent)}

/* =========================================================
   CTA band
   ========================================================= */
.cta-band{
  max-width:820px;margin:70px auto 0;padding:52px 26px;text-align:center;
  border-radius:30px;position:relative;overflow:hidden;
  background:
    radial-gradient(600px 300px at 50% -20%, rgba(40,224,200,.18), transparent 70%),
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.015));
  border:1px solid rgba(255,255,255,.1);
}
.cta-logo{width:min(320px,74%);margin:0 auto 8px;filter:drop-shadow(0 8px 30px rgba(40,224,200,.3))}
.cta-band h2{font-size:clamp(1.8rem,4vw,2.6rem);margin-top:10px}
.cta-band p{color:var(--dim);margin:12px 0 26px;font-size:1.05rem}

/* =========================================================
   Footer
   ========================================================= */
.footer{
  max-width:var(--maxw);margin:0 auto;padding:40px 22px 56px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;
  color:var(--dim);font-size:.86rem;
}
.footer-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:600;color:var(--text)}
.footer-brand img{width:26px;height:26px;border-radius:7px}

/* =========================================================
   Reveal on scroll
   ========================================================= */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease, transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .orb,.chip-you{animation:none}
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;text-align:center;padding-top:30px;gap:34px}
  .hero-sub{margin-left:auto;margin-right:auto}
  .stores{justify-content:center}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .nav-cta{display:none}
  .feature-grid{grid-template-columns:1fr}
  .store-badge{flex:1 1 auto;justify-content:center}
  .hero-title{font-size:clamp(2.4rem,10vw,3.2rem)}
  .footer{justify-content:center;text-align:center}
}