:root{--bg:#0a0f16;--surface:#111826;--text:#e5e7eb;--muted:#94a3b8;--brand:#ff7a00;--brand2:#00e0ff;}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  color:var(--text);
  font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;
  background:
    radial-gradient(60vw 80vh at 0% 50%,rgba(0,224,255,.12),transparent 60%),
    radial-gradient(60vw 80vh at 100% 50%,rgba(255,122,0,.12),transparent 60%),
    #0a0f16;
}
.container{width:80vw;margin-inline:10vw}
@media(max-width:900px){.container{width:min(94%,780px);margin-inline:auto}}
h1,h2,h3{font-family:Rajdhani,system-ui,Arial,sans-serif;margin:0 0 .4rem}
a{color:var(--brand2);text-decoration:none}
.small{font-size:.9rem;color:#9ca3af}

.site-header{position:sticky;top:0;z-index:10;background:rgba(10,15,22,.7);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.8rem 0}
.brand{display:flex;gap:.6rem;align-items:center}
.brand-logo{width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.1);object-fit:cover}
.nav{display:flex;gap:1rem;align-items:center}
.nav a{padding:.5rem .6rem;border-radius:10px}
.nav a:hover{background:rgba(255,255,255,.06)}
.btn{border:0;border-radius:12px;padding:.6rem 1rem;font-weight:600;cursor:pointer}
.btn-primary{background:linear-gradient(90deg,var(--brand),var(--brand2));color:#0b0f15}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,.2);color:var(--text)}
.btn-ghost{background:rgba(255,255,255,.08);color:var(--text)}

.section{padding:clamp(2rem,6vw,4rem) 0}
.alt{background:linear-gradient(180deg,rgba(255,255,255,.02),transparent)}
.hero{padding:clamp(2rem,6vw,5rem) 0;position:relative;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:160px 1fr;gap:1.4rem;align-items:center}
.title{font-size:clamp(2.2rem,8vw,5rem)}
.title span{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.subtitle{color:#cbd5e1}
.cta-group{display:flex;gap:.6rem;flex-wrap:wrap}
.hero-logo{width:160px;height:160px;border-radius:22px;border:1px solid rgba(255,255,255,.1)}

/* Grid overlay in hero: starts left, fades to right and bottom */
.grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:40px 40px;
  /* Fade right and bottom */
  -webkit-mask-image:
    linear-gradient(90deg, #000 0%, #000 70%, rgba(0,0,0,0) 100%),
    linear-gradient(180deg, #000 0%, #000 88%, rgba(0,0,0,0) 100%);
  mask-image:
    linear-gradient(90deg, #000 0%, #000 70%, rgba(0,0,0,0) 100%),
    linear-gradient(180deg, #000 0%, #000 88%, rgba(0,0,0,0) 100%);
  -webkit-mask-composite: destination-in;
  mask-composite: intersect;
}

.features,.game-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin-top:1rem}
.card,.game-card{background:var(--surface);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:1rem}

.upload-list{list-style:none;margin:0;padding:0}
.upload-list li{display:flex;justify-content:space-between;align-items:center;border:1px dashed rgba(255,255,255,.15);border-radius:10px;margin:.4rem 0;padding:.5rem .7rem}

.weeks{display:grid;gap:1rem}
.week-card{background:var(--surface);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:1rem}

.site-footer{border-top:1px solid rgba(255,255,255,.06);padding:1rem 0;background:rgba(10,15,22,.6)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:.8rem}
.footer-inner a{color:#9ca3af}

.login-dialog{border:none;background:transparent}
.login-box{width:min(420px,92%);margin:auto;background:var(--surface);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:1rem}
.field{display:grid;gap:.3rem;margin:.6rem 0}
.field input{background:#0e1420;border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:.7rem .8rem;color:var(--text)}
.error{color:#ff6b6b;min-height:1.2em}