/* THEME TOKENS */
:root{
  /* Default to dark values; light overrides below */
  --bg: #0b0d10;
  --panel: #11151a;
  --text: #e6edf3;
  --muted: #9aa4b2;
  --accent: #7cacf8;
  --accent-2:#a58bff;
  --border: #1f2833;
}

:root[data-theme="light"]{
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #0b1220;
  --muted: #586173;
  --accent: #1b73e8;
  --accent-2:#7f56d9;
  --border: #e6e8ee;
}

/* RESET & BASE */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, 'Apple Color Emoji','Segoe UI Emoji';
  color:var(--text);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(124,172,248,0.15), transparent 60%),
             radial-gradient(900px 500px at 10% -10%, rgba(165,139,255,0.12), transparent 60%),
             var(--bg);
  line-height:1.6;
}

.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* HEADER */
.site-header{
  position:sticky; top:0; z-index:10;
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 20px; background:rgba(11,13,16,0.6); backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
}
:root[data-theme="light"] .site-header{ background:rgba(246,247,249,0.7) }
.logo{font-weight:700; letter-spacing:0.5px; color:var(--text); text-decoration:none}
.nav{display:flex; align-items:center; gap:14px}
.nav a{color:var(--text); text-decoration:none; font-size:15px}
.nav .btn{border:1px solid var(--border); padding:6px 10px; border-radius:10px}
.theme-toggle{
  margin-left:6px;
  border:1px solid var(--border);
  background:transparent; color:var(--text);
  padding:6px 10px; border-radius:10px; cursor:pointer;
}
.theme-toggle:hover{border-color:var(--accent)}

.btn{display:inline-block; padding:10px 14px; border-radius:12px; border:1px solid var(--border); text-decoration:none; color:var(--text)}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2)); color:#0b0d10; font-weight:700; border:none}
.btn.small{padding:6px 10px; font-size:14px}

/* HERO */
.hero{padding:72px 20px 42px}
.hero-inner{max-width:900px; margin:0 auto; text-align:center}
h1{font-size:52px; line-height:1.1; margin:0 0 12px}
.accent{background:linear-gradient(90deg,var(--accent),var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent}
.tagline{font-size:18px; color:var(--muted); margin:0 auto 18px; max-width:720px}
.cta{display:flex; gap:12px; justify-content:center; flex-wrap:wrap}

/* SECTIONS */
.section{padding:34px 20px; max-width:1000px; margin:0 auto}
.section h2{font-size:28px; margin:0 0 8px}
.section p{color:var(--text)}

.chips{list-style:none; padding:0; margin:12px 0 0; display:flex; flex-wrap:wrap; gap:8px}
.chips li{border:1px solid var(--border); padding:6px 10px; border-radius:999px; color:var(--muted)}

/* CARDS */
.grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:14px}
@media (max-width:900px){ .grid{grid-template-columns:repeat(2, 1fr)} }
@media (max-width:600px){ .grid{grid-template-columns:1fr} }

.card{background:var(--panel); border:1px solid var(--border); border-radius:16px; padding:16px}
.card h3{margin:0 0 8px}
.card p{color:var(--muted); margin:0 0 12px}
.card-actions{display:flex; gap:10px; flex-wrap:wrap}

/* FOOTER */
.site-footer{padding:24px; text-align:center; color:var(--muted); border-top:1px solid var(--border); margin-top:30px}

/* MISC */
a[aria-disabled="true"]{opacity:.6; pointer-events:none}