/* =========
   Core Theme (indigo / neon-violet glow)
   ========= */

:root{
  --bg:#0a0f1a;            /* deep navy */
  --panel:#0f1524;
  --panel-2:#0b1020;
  --text:#e8eaf3;
  --muted:#9aa3b2;

  --brand-1:#6d5dfc;       /* electric violet */
  --brand-2:#8a5cf6;       /* soft violet */
  --brand-3:#3aa5ff;       /* cyan accent */
  --ring:rgba(118,93,252,.35);

  --border:rgba(255,255,255,.08);
  --card-shadow:0 8px 40px rgba(55,35,150,.25), 0 1px 0 rgba(255,255,255,.03) inset;
  --glow: drop-shadow(0 6px 30px rgba(109,93,252,.45));
}
html[data-theme="light"]{
  --bg:#ffffff;
  --panel:#f7f9ff;
  --panel-2:#ffffff;
  --text:#0f172a;
  --muted:#5b6472;
  --border:rgba(8,15,35,.12);
  --ring:rgba(46,148,255,.35);
  --card-shadow:0 8px 30px rgba(0,0,0,.08), 0 1px 0 rgba(0,0,0,.04) inset;
}

/* Base */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; color:var(--text); background:var(--bg);
  font:400 16px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Apple Color Emoji","Segoe UI Emoji";
}

/* Background */
.sg-bg{position:fixed; inset:0; width:100%; height:100%; z-index:-2; display:block}
.sg-bg-glow{
  position:fixed; inset:0; z-index:-1; pointer-events:none;
  background:
    radial-gradient(1200px 600px at 70% 20%, rgba(109,93,252,.25), transparent 60%),
    radial-gradient(800px 500px at 20% 70%, rgba(58,165,255,.18), transparent 55%);
  filter:blur(8px);
}

/* Header */
.sg-header{
  position:sticky; top:0; z-index:20;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg), transparent 70%);
  border-bottom:1px solid var(--border);
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 24px;
}
.brand{display:flex; align-items:center; gap:12px; text-decoration:none; color:inherit}
.brand-txt{font-weight:700; letter-spacing:.2px}
.brand-txt .accent{color:var(--brand-1)}
.logo{position:relative; width:30px; height:30px; display:inline-grid; place-items:center; filter:var(--glow)}
.logo .layer{position:absolute; width:26px; height:26px; border-radius:10px; background:var(--brand-1); box-shadow: var(--card-shadow)}
.logo .l2{transform:translateY(6px); background:linear-gradient(180deg, var(--brand-2), #4e4be8)}
.logo .l3{transform:translateY(12px); background:linear-gradient(180deg, #352f85, #26245f)}
.logo.mini .layer{width:20px; height:20px; border-radius:8px}

.nav{display:flex; gap:18px}
.nav a{color:var(--text); text-decoration:none; opacity:.85}
.nav a:hover{opacity:1}

.actions{display:flex; align-items:center; gap:12px}
button.ghost{
  background:transparent; border:1px solid var(--border); color:var(--text);
  padding:8px 10px; border-radius:12px; cursor:pointer; display:inline-flex; align-items:center; gap:8px;
}
button.ghost .icon{width:18px; height:18px; display:block}
button.ghost .sun{display:none}
html[data-theme="light"] button.ghost .sun{display:block}
html[data-theme="light"] button.ghost .moon{display:none}

a.cta{
  --c1:var(--brand-1); --c2:var(--brand-3);
  color:white; text-decoration:none; font-weight:600;
  background:linear-gradient(135deg, var(--c1), var(--c2));
  padding:10px 14px; border-radius:12px; display:inline-flex; align-items:center; gap:8px;
  box-shadow:0 12px 34px rgba(86,124,255,.35);
}
a.cta .ml{width:16px; height:16px}

/* Layout */
.sg-main{padding:28px 22px}

/* Panels & cards */
.card{
  background:linear-gradient(180deg, color-mix(in oklab, var(--panel), black 6%), color-mix(in oklab, var(--panel-2), black 6%));
  border:1px solid var(--border); border-radius:16px; box-shadow: var(--card-shadow);
}

/* Footer */
.sg-footer{border-top:1px solid var(--border); padding:36px 22px}
.sg-footer .grid{display:grid; gap:26px; grid-template-columns: repeat(12,1fr); max-width:1200px; margin:0 auto}
.sg-footer .col:nth-child(1){grid-column: span 5}
.sg-footer .col:nth-child(2){grid-column: span 3}
.sg-footer .col:nth-child(3){grid-column: span 2}
.sg-footer .col:nth-child(4){grid-column: span 2}
@media (max-width: 960px){
  .sg-footer .grid{grid-template-columns: 1fr}
  .sg-footer .col{grid-column: initial}
}
.sg-footer .brand-mini{display:flex; gap:12px; align-items:center}
.sg-footer .muted{color:var(--muted)}
.sg-footer h4{margin:.2rem 0 .6rem; font-size:14px; letter-spacing:.3px; color:var(--text)}
.sg-footer .links{list-style:none; padding:0; margin:0; display:grid; gap:6px}
.sg-footer .links a{color:var(--text); text-decoration:none; opacity:.85}
.sg-footer .links a:hover{opacity:1}
.sg-footer .sub{display:flex; align-items:center; gap:10px; justify-content:center; margin-top:22px; color:var(--muted); font-size:13px}
.sg-footer .sep{opacity:.4}

/* Small helpers */
.muted{color:var(--muted)}