:root{
  --bg:#f5f6f7; --fg:#0b0b0c; --muted:#3b3b3f;
  --card:#ffffff; --card-border:#00000014;
  --brand:#3f64f8; --brand-50:#eef2ff;
  --shadow:0 10px 30px rgba(0,0,0,.15);
}
:root.dark{
  --bg:#0b0b0c; --fg:#f7f7f8; --muted:#c7c8cc;
  --card:#141418; --card-border:#ffffff19;
  --brand:#5c84ff; --brand-50:#1a1c27;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
  background:var(--bg);color:var(--fg);line-height:1.6;
  transition:background .3s ease,color .3s ease;
}
a{color:inherit;text-decoration:none}

.container{max-width:1120px;margin:0 auto;padding:0 16px}
.container.narrow{max-width:720px}
.container.wide{max-width:1200px}
.row{display:flex;gap:16px;align-items:center}
.space-between{justify-content:space-between}
.align-end{align-items:flex-end}
.text-center{text-align:center}

.section{padding:80px 0}
.section.section-border{border-top:1px solid var(--card-border)}
h1,h2,h3{line-height:1.2;margin:0}
h1{font-size:clamp(32px,6vw,56px);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:12px}
h3{font-size:18px;font-weight:700}
.lead{max-width:680px;margin:16px auto 0;color:var(--muted)}
.muted{color:var(--muted)}

/* HEADER (title left, rest right) */
.site-header{position:sticky;top:0;z-index:40;backdrop-filter:saturate(150%) blur(10px);border-bottom:1px solid var(--card-border);background:color-mix(in oklab, var(--bg) 80%, transparent)}
.header-inner{display:flex;justify-content:space-between;align-items:center;height:64px}
.header-left{flex-shrink:0}
.header-right{display:flex;align-items:center;gap:2rem;margin-left:auto}
.primary-nav{display:flex;gap:1.2rem}
.primary-nav a{font-weight:600;font-size:14px}
.header-actions{display:flex;gap:.8rem}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700}
.brand-mark{width:24px;height:24px;border-radius:10px;background:var(--brand);box-shadow:0 0 0 2px color-mix(in srgb, var(--brand), transparent 85%), var(--shadow)}
.brand-name{font-size:14px;letter-spacing:.08em}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:12px;padding:10px 14px;font-size:13px;font-weight:700;border:1px solid var(--card-border);cursor:pointer;transition:filter .2s,transform .02s}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--brand);color:#fff;border:none;box-shadow:0 0 0 2px color-mix(in srgb, var(--brand), transparent 80%), var(--shadow)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--fg)}
.btn.ghost:hover{filter:brightness(.96)}

/* HERO */
.hero{position:relative;overflow:hidden}
.hero .actions{margin-top:22px;display:flex;gap:10px;justify-content:center}
.hero-title .accent{background:linear-gradient(90deg, #7aa2ff, var(--brand));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-bg{position:absolute;inset:-20%;z-index:-1;filter:blur(40px);
  background:
    radial-gradient(60% 60% at 50% 40%, color-mix(in srgb, var(--brand), transparent 75%), transparent 60%),
    radial-gradient(40% 40% at 80% 10%, color-mix(in srgb, var(--brand), transparent 85%), transparent 60%),
    radial-gradient(35% 35% at 10% 80%, color-mix(in srgb, var(--brand), transparent 90%), transparent 60%);
}

/* CARDS & GRIDS */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:24px}
.card{padding:20px;border-radius:16px;background:color-mix(in oklab, var(--card) 90%, transparent);border:1px solid var(--card-border)}
.card.highlight{grid-column:1/-1;background:linear-gradient(90deg, color-mix(in srgb, var(--card), white 10%), color-mix(in srgb, var(--brand-50), var(--card) 70%))}
.grid{display:grid;gap:16px;margin-top:24px}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid.three{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.link{font-size:14px;font-weight:700;color:var(--brand)}
.link-card{display:block;overflow:hidden;transition:filter .2s, transform .02s}
.link-card:hover{filter:brightness(1.02)}
.thumb{aspect-ratio:16/9;border-radius:16px;background:linear-gradient(135deg, var(--brand-50), color-mix(in srgb, white, transparent 70%));border:1px solid var(--card-border)}
.thumb.square{aspect-ratio:1/1}
.card-body{padding:14px 18px}
.card-body p{opacity:.9;margin:8px 0 0}
.chip{display:inline-block;margin-top:10px;font-size:12px;font-weight:700;color:var(--brand)}

/* FORMS */
.form{display:grid;gap:12px;margin-top:16px}
.form input,.form textarea{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--card-border);background:color-mix(in oklab, var(--card) 95%, transparent);color:var(--fg)}
.form .help{font-size:12px;color:var(--muted)}

/* FOOTER */
.site-footer{border-top:1px solid var(--card-border);padding:28px 0;margin-top:20px}
.footer-inner{gap:12px;flex-wrap:wrap}
.footer-nav{display:flex;gap:16px}

/* A11Y */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{position:fixed;left:12px;top:12px;z-index:1000;width:auto;height:auto;padding:8px 12px;border-radius:8px;background:#fff;color:#000;outline:2px solid var(--brand)}

/* RESPONSIVE (optional) */
@media (max-width: 860px){
  .primary-nav{display:none}
  .header-right{gap:1rem}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}