:root{
  --bg:#0b0f14;
  --panel:#121a24;
  --text:#e8eef6;
  --muted:#a9b6c6;
  --accent:#6fd3ff;
  --accent2:#9cffc9;
  --danger:#ff6f91;
  --border:rgba(255,255,255,0.08);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --radius:16px;
  --max:1080px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: var(--sans);
  background: linear-gradient(180deg, #0f172a 0%, var(--bg) 70%);
  background-attachment: fixed;
  color:var(--text);
  line-height:1.55;
}

a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
code, pre{font-family:var(--mono)}
small{color:var(--muted)}

.container{max-width:var(--max); margin:0 auto; padding:24px}
.nav{
  position:sticky; top:0; z-index:10;
  background: rgba(11,15,20,0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner{max-width:var(--max); margin:0 auto; padding:14px 24px; display:flex; align-items:center; gap:16px}
.brand{display:flex; flex-direction:column; gap:2px}
.brand strong{letter-spacing:0.2px}
.brand span{font-size:12px; color:var(--muted)}
.nav a{color:var(--text)}
.navlinks{display:flex; flex-wrap:wrap; gap:14px; margin-left:auto}
.navlinks a{font-size:14px; opacity:0.92}
.navlinks a.active{color:var(--accent2); opacity:1}

.hero{
  padding:54px 0 14px;
}
.hero h1{margin:0 0 8px; font-size:44px; letter-spacing:-0.5px}
.hero p{margin:0; color:var(--muted); max-width:72ch}
.badges{display:flex; flex-wrap:wrap; gap:10px; margin-top:18px}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 11px;
  border:1px solid var(--border);
  border-radius:999px;
  background:rgba(255,255,255,0.03);
  box-shadow: var(--shadow);
  font-size:13px;
  color:var(--text);
}
.badge .dot{width:8px; height:8px; border-radius:50%; background:var(--accent2)}

.grid{display:grid; grid-template-columns:repeat(12,1fr); gap:16px; margin:22px 0 40px}
.card{
  grid-column: span 6;
  background: rgba(18,26,36,0.68);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding:18px;
}
.card h2{margin:0 0 8px; font-size:18px}
.card p{margin:0 0 10px; color:var(--muted)}
.card ul{margin:8px 0 0 18px; color:var(--muted)}
.card .meta{margin-top:12px; font-size:12px; color:var(--muted)}
.card .cta{display:inline-flex; margin-top:12px; padding:10px 12px; border-radius:12px; border:1px solid var(--border); background:rgba(255,255,255,0.03)}
.card .cta:hover{text-decoration:none; border-color:rgba(255,255,255,0.18)}

@media (max-width: 860px){
  .hero h1{font-size:36px}
  .card{grid-column: span 12}
}

.section-title{display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin:28px 0 12px}
.section-title h2{margin:0}
.section-title .sub{color:var(--muted); font-size:13px}

.table{
  width:100%;
  border-collapse:collapse;
  overflow:hidden;
  border-radius:14px;
  border:1px solid var(--border);
  background:rgba(18,26,36,0.58);
  box-shadow:var(--shadow);
}
.table th,.table td{padding:10px 12px; border-bottom:1px solid var(--border); font-size:14px}
.table th{color:var(--muted); text-align:left; font-weight:600}
.table tr:last-child td{border-bottom:none}
.kbd{
  font-family:var(--mono);
  font-size:12px;
  padding:2px 6px;
  border:1px solid var(--border);
  border-bottom-color:rgba(255,255,255,0.20);
  border-radius:8px;
  background:rgba(255,255,255,0.03);
}

.footer{
  border-top:1px solid var(--border);
  background:#000;
  padding:22px 0 40px;
  color:var(--muted);
  font-size:13px;
}
.footer .cols{display:grid; grid-template-columns:repeat(12,1fr); gap:16px; max-width:var(--max); margin:0 auto; padding:0 24px}
.footer .col{grid-column: span 4}
.footer a{color:var(--muted)}
.footer a:hover{color:var(--text)}
.footer .tiny{margin-top:10px; font-size:12px; color:rgba(169,182,198,0.8)}
.notice{
  margin-top:14px;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,0.10);
  background:rgba(255,255,255,0.03);
  color:var(--muted);
  font-size:13px;
}
input,select,button{
  font:inherit;
}
.controls{
  display:flex; flex-wrap:wrap; gap:10px;
  margin:10px 0 14px;
}
.controls input, .controls select{
  background:rgba(18,26,36,0.78);
  border:1px solid var(--border);
  color:var(--text);
  padding:10px 12px;
  border-radius:12px;
  outline:none;
  min-width: 220px;
}
.controls button{
  cursor:pointer;
  background:rgba(111,211,255,0.14);
  border:1px solid rgba(111,211,255,0.35);
  color:var(--text);
  padding:10px 12px;
  border-radius:12px;
}
.controls button:hover{
  background:rgba(111,211,255,0.20);
}
.pill{
  display:inline-flex; align-items:center;
  padding:4px 10px; border-radius:999px;
  border:1px solid var(--border);
  color:var(--muted);
  font-size:12px;
}


.codebox{white-space:pre-wrap; padding:12px 14px; border:1px solid var(--border); border-radius:14px; background:rgba(18,26,36,0.78); color:var(--text); overflow:auto;}


/* ===== Theme: Light Mode ===== */
:root[data-theme="light"]{
  --bg:#f6f7fb;
  --panel:#ffffff;
  --text:#0b1220;
  --muted:#415169;
  --accent:#0ea5e9;
  --accent2:#059669;
  --danger:#dc2626;
  --border:rgba(2,6,23,0.10);
  --shadow: 0 10px 30px rgba(2,6,23,0.10);
}
:root[data-theme="light"] body{
  background: linear-gradient(180deg, #f1f5f9 0%, var(--bg) 70%);
  background-attachment: fixed;
}
:root[data-theme="light"] .nav{
  background: rgba(246,247,251,0.85);
}
:root[data-theme="light"] .card{
  background: rgba(255,255,255,0.86);
}
:root[data-theme="light"] .table{
  background: rgba(255,255,255,0.9);
}
:root[data-theme="light"] .footer{
  background:#000; /* requested */
  color: rgba(255,255,255,0.75);
}
:root[data-theme="light"] .footer a{ color: rgba(255,255,255,0.75); }
:root[data-theme="light"] .footer a:hover{ color: #fff; }

/* Theme toggle button */
.theme-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  cursor:pointer;
  font-size:13px;
}
.theme-toggle:hover{
  border-color: rgba(255,255,255,0.18);
  text-decoration:none;
}


/* ===== Footer full-width ===== */
.footer{
  width:100vw;
  margin-left:calc(50% - 50vw);
  margin-right:calc(50% - 50vw);
  border-top:1px solid var(--border);
  background:#000;
}
.footer .container{
  max-width:1200px;
  margin:0 auto;
  padding:24px 20px 40px;
}

/* ===== Mobile optimization ===== */
@media (max-width: 768px){
  .nav .container{
    flex-wrap:wrap;
    gap:12px;
  }
  .nav nav{
    flex-wrap:wrap;
    gap:14px;
  }
  .theme-toggle{
    width:100%;
    justify-content:center;
  }
  .hero{
    padding:28px 0 10px;
  }
  .hero h1{
    font-size:28px;
    line-height:1.15;
  }
  .hero p{
    font-size:15px;
  }
  .grid{
    grid-template-columns:1fr;
  }
  .card{
    padding:18px;
  }
  .controls{
    flex-wrap:wrap;
    gap:10px;
  }
  .controls input,
  .controls select{
    width:100%;
  }
  .table{
    display:block;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
  }
  .badges{
    flex-wrap:wrap;
  }
}

/* Extra small phones */
@media (max-width: 420px){
  .hero h1{ font-size:24px; }
  .cta{ width:100%; text-align:center; }
}