:root{
  --accent:#0e8fa8; --accent-dark:#0c6f86; --ink:#0e2a32; --muted:#5a8794;
  --bg:#eef7fb; --card:#ffffff; --line:#cfe6ee; --line2:#8fbecb; --soft:#2f5662;
}
*{box-sizing:border-box}
body{margin:0;color:var(--ink);
  background-color:var(--bg);
  background-image:url('/assets/xc-scene.svg');
  background-repeat:no-repeat;
  background-position:center bottom;
  background-attachment:fixed;
  background-size:min(1400px,150%) auto;
  font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.55}
a{color:var(--accent-dark);text-decoration:none}
a:hover{text-decoration:underline}

.site{display:flex;align-items:center;justify-content:space-between;
  padding:12px 24px;background:#fff;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center}
.brand-logo{height:34px;display:block}
.site nav a{margin-left:18px;font-weight:600;color:var(--ink)}
.site nav a.active{color:var(--accent-dark)}
.site-foot{padding:28px 24px;text-align:center;color:var(--muted);font-size:13px}

.wrap{max-width:880px;margin:0 auto;padding:32px 24px 60px}
h1{font-size:34px;margin:0 0 12px}
h2{font-size:22px;margin:32px 0 12px}
.lead{font-size:18px;color:var(--soft);max-width:620px}
.muted{color:var(--muted)}
.small{font-size:12px}

.btn-back{display:inline-block;margin-bottom:16px;color:var(--muted);font-weight:600;font-size:14px}
.btn-back:hover{color:var(--accent-dark);text-decoration:none}

.hero{padding:24px 0 8px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0 6px}
.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:700;
  padding:11px 20px;border-radius:8px;border:none;cursor:pointer;font-size:15px}
.btn:hover{background:var(--accent-dark);text-decoration:none}
.btn-ghost{background:#fff;color:var(--accent-dark);border:1px solid var(--line2)}

.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:36px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.feat h3{margin:0 0 6px;color:var(--accent-dark);font-size:17px}
.feat p{margin:0;color:var(--soft);font-size:14px}

.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px 24px;margin-top:8px}
.alert{background:#fde2e2;border:1px solid #e6a0a0;color:#9a2b2b;padding:10px 14px;border-radius:8px;margin:12px 0}

.field{margin:12px 0}
.field label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:4px}
.field input{width:100%;padding:10px 12px;border:1px solid var(--line2);border-radius:8px;font-size:15px}

.tiers{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:14px}
.tier{display:flex;flex-direction:column;gap:4px;border:1px solid var(--line2);border-radius:10px;padding:14px;cursor:pointer}
.tier:hover{border-color:var(--accent)}
.tier input{margin-bottom:6px}
.tier-name{font-weight:700}
.tier-price{font-size:22px;color:var(--accent-dark);font-weight:800}
.tier-meta{font-size:12px;color:var(--muted)}

.download .dl-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.dl-os{font-weight:700;font-size:16px}
.steps{padding-left:20px}
.steps li{margin:8px 0}
code{background:#d8eef4;padding:2px 6px;border-radius:5px;font-size:12px}

/* Guide / wiki page */
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin:8px 0 24px}
.toc h2{margin:0 0 8px;font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.toc ul{margin:0;padding-left:18px;columns:2;column-gap:28px}
.toc li{margin:4px 0}
.guide section{margin:26px 0;scroll-margin-top:18px}
.guide h2{border-bottom:1px solid var(--line);padding-bottom:6px;margin-top:28px}
.guide h3{color:var(--accent-dark);margin:16px 0 4px;font-size:16px}
.guide p,.guide li{color:#34474f}
.guide ul,.guide ol{padding-left:20px}
.guide li{margin:5px 0}
@media (max-width:560px){.toc ul{columns:1}}

/* Home hero band */
.hero-band{position:relative;overflow:hidden;border-radius:16px;margin-top:6px;
  background:linear-gradient(135deg,#1597b0,#0c6f86);color:#fff;padding:42px 34px 140px}
.hero-inner{position:relative;z-index:2}
.hero-band h1{color:#fff;font-size:38px;line-height:1.15;max-width:580px;margin:0 0 14px}
.hero-band .lead{color:#dcf1f6;max-width:560px}
.hero-band .cta{margin:22px 0 6px}
.hero-band .cta .btn{background:#fff;color:#0c6f86}
.hero-band .cta .btn:hover{background:#e9f7fb}
.hero-band .cta .btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.65)}
.hero-band .cta .btn-ghost:hover{background:rgba(255,255,255,.12)}
.muted-on{color:#c4e8ef;font-size:14px}
.muted-on a{color:#fff;text-decoration:underline}
.hero-art{position:absolute;left:0;right:0;bottom:0;width:100%;display:block;z-index:1}
@media(max-width:620px){.hero-band{padding:30px 22px 104px}.hero-band h1{font-size:29px}}

/* Feature + step icons */
.feat-icon{width:46px;height:46px;border-radius:12px;background:#e6f5f9;color:#0e8fa8;
  display:flex;align-items:center;justify-content:center;margin-bottom:12px;flex-shrink:0}
.feat-icon svg{width:24px;height:24px}

/* How it works */
.how{margin-top:48px}
.how-title{text-align:center;margin-bottom:4px}
.steps-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:18px}
.step{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.step .feat-icon{margin-bottom:0}
.step strong{display:block;margin-bottom:3px;color:var(--ink)}
.step p{margin:0;color:#34474f;font-size:14px}
.cta-center{justify-content:center;margin-top:26px}