:root{
  --accent:#3b5bdb; --accent2:#0f9d6b; --text:#1a1f2e; --muted:#5b647a;
  --ring:#e3e7f0; --soft:#f7f8fb;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#fff;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}

/* Unified stacked-centered ribbon (matches concrete + calculator pages) */
.ribbon{display:flex;flex-direction:column;align-items:center;gap:8px;padding:12px 18px;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--ring);position:sticky;top:0;z-index:10;box-shadow:0 2px 6px rgba(20,30,60,.04)}
.brand{font-weight:700;letter-spacing:.3px;font-size:1.05rem}
.ribbon nav{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.ribbon nav a{color:var(--muted);text-decoration:none;font-size:.92rem;padding:.3rem .6rem;border-radius:6px;transition:color .18s ease,background .18s ease}
.ribbon nav a:hover{color:var(--accent);background:rgba(59,91,219,.07)}
.ribbon nav a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

main{max-width:900px;margin:0 auto;padding:34px 16px 50px}
@media (min-width:640px){main{padding:46px 24px 64px}}

/* Centered hero for elegant first impression */
.hero{text-align:center;margin-bottom:10px;padding:8px 0 4px}
.hero .lede{margin-left:auto;margin-right:auto}

/* Uniform type hierarchy */
h1{font-size:2.05rem;font-weight:800;margin:.2em 0 .3em;letter-spacing:-.02em;line-height:1.2}
.lede{color:var(--muted);font-size:1.1rem;max-width:58ch;margin:.4em 0 0;line-height:1.6}
h2{margin-top:36px;font-size:1.4rem;font-weight:700;letter-spacing:-.01em}
h3{margin-top:18px;color:var(--accent);font-size:1.05rem;font-weight:700}
p{max-width:70ch}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:22px}
@media (min-width:640px){.cards{gap:24px}}
.card{display:flex;flex-direction:column;gap:6px;background:var(--soft);border:1px solid var(--ring);border-radius:14px;padding:22px;text-decoration:none;color:var(--text);box-shadow:0 6px 18px rgba(20,30,60,.06);transition:transform .14s ease,box-shadow .14s ease,border-color .14s ease}
a.card:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(20,30,60,.12);border-color:var(--accent)}
a.card:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.card-ico{font-size:1.9rem}
.card-title{font-weight:800;font-size:1.06rem}
.card-desc{font-size:.9rem;color:var(--muted)}
.card-cta{margin-top:auto;font-weight:700;font-size:.88rem;color:var(--accent)}
.card-soon{opacity:.65;cursor:default}
.card-soon .card-cta{color:var(--muted);font-weight:600}

.benefits{padding-left:1.1em;max-width:64ch}
.benefits li{margin:.5em 0;color:var(--text)}

footer{border-top:1px solid var(--ring);color:var(--muted);text-align:center;padding:24px;font-size:.86rem;margin-top:36px}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--accent)}

@media (max-width:520px){
  h1{font-size:1.6rem}
  .lede{font-size:.98rem}
  main{padding:24px 12px 40px}
  .cards{grid-template-columns:1fr;gap:12px}
}

/* Accessibility: honour reduced-motion preference */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  a.card:hover{transform:none}
}