:root{
  --core-bg:#eef7f5;
  --core-bg-2:#f8fbf8;
  --core-panel:rgba(255,255,255,.78);
  --core-panel-solid:#ffffff;
  --core-ink:#10201d;
  --core-muted:#5d6f69;
  --core-line:rgba(37,81,74,.14);
  --core-teal:#178f83;
  --core-teal-dark:#0d625b;
  --core-blue:#3b72f6;
  --core-mint:#9ee6d5;
  --core-sand:#f5e9c8;
  --core-warn:#fff8e6;
  --core-shadow:0 22px 70px rgba(30,75,68,.12);
  --core-shadow-soft:0 12px 40px rgba(30,75,68,.08);
  --core-radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  background:
    radial-gradient(circle at 14% 10%,rgba(158,230,213,.52),transparent 32%),
    radial-gradient(circle at 86% 12%,rgba(245,233,200,.56),transparent 34%),
    linear-gradient(180deg,#fbfffd 0%,var(--core-bg) 48%,#f7faf8 100%);
  color:var(--core-ink);
}
a{color:inherit}
.core-bg-orb{position:fixed;z-index:-1;border-radius:999px;filter:blur(8px);opacity:.52;pointer-events:none}
.core-bg-orb-a{width:280px;height:280px;left:-110px;top:230px;background:rgba(23,143,131,.15)}
.core-bg-orb-b{width:320px;height:320px;right:-140px;top:420px;background:rgba(59,114,246,.10)}
.core-topbar{
  position:sticky;
  top:0;
  z-index:30;
  min-height:76px;
  border-bottom:1px solid var(--core-line);
  background:rgba(251,255,253,.76);
  backdrop-filter:blur(18px);
}
.core-topbar-inner{
  width:min(1180px,calc(100% - 40px));
  margin:0 auto;
  min-height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.core-brand{display:flex;align-items:center;gap:13px;text-decoration:none;font-weight:900}
.core-mark{
  position:relative;
  width:44px;height:44px;border-radius:16px;
  display:inline-block;
  background:linear-gradient(145deg,#ffffff,#e5faf3);
  border:1px solid rgba(23,143,131,.18);
  box-shadow:0 12px 30px rgba(23,143,131,.16);
}
.core-mark::before,.core-mark::after{content:"";position:absolute;background:rgba(23,143,131,.46);height:2px;transform-origin:left center}
.core-mark::before{width:24px;left:11px;top:15px;transform:rotate(28deg)}
.core-mark::after{width:24px;left:12px;top:29px;transform:rotate(-28deg)}
.core-mark-node{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--core-teal);box-shadow:0 0 0 5px rgba(23,143,131,.10)}
.core-mark-node:nth-child(1){left:8px;top:10px}.core-mark-node:nth-child(2){right:8px;top:18px}.core-mark-node:nth-child(3){left:11px;bottom:8px}
.core-brand-title{display:block;font-size:19px;letter-spacing:-.03em;line-height:1}
.core-brand-subtitle{display:block;margin-top:4px;color:var(--core-muted);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.core-nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.core-pill,.core-button{
  border:1px solid var(--core-line);
  background:rgba(255,255,255,.72);
  color:var(--core-ink);
  border-radius:999px;
  padding:10px 16px;
  text-decoration:none;
  font-weight:850;
  white-space:nowrap;
  box-shadow:0 6px 20px rgba(30,75,68,.04);
}
.core-pill:hover,.core-button:hover{border-color:rgba(23,143,131,.34);transform:translateY(-1px)}
.core-pill.primary,.core-button.primary{background:linear-gradient(135deg,var(--core-teal),var(--core-teal-dark));border-color:transparent;color:#fff}
.core-shell{width:min(1180px,calc(100% - 40px));margin:0 auto;padding:42px 0}
.core-hero{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:minmax(0,1.06fr) minmax(320px,.74fr);
  gap:34px;
  align-items:center;
  min-height:560px;
  background:linear-gradient(135deg,rgba(255,255,255,.92),rgba(240,252,247,.82));
  border:1px solid var(--core-line);
  border-radius:38px;
  box-shadow:var(--core-shadow);
  padding:52px;
}
.core-hero::before{content:"";position:absolute;inset:auto -130px -170px auto;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(23,143,131,.16),transparent 66%)}
.core-hero-copy{position:relative;z-index:2}.core-eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--core-teal-dark);font-size:12px;font-weight:950;letter-spacing:.16em;text-transform:uppercase}.core-eyebrow::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--core-teal)}
.core-hero h1{font-size:clamp(42px,6vw,78px);line-height:.95;margin:18px 0 18px;letter-spacing:-.07em;max-width:860px}.core-hero p{font-size:19px;line-height:1.75;color:var(--core-muted);max-width:740px;margin:0}.core-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.core-button{display:inline-flex;align-items:center;justify-content:center;padding:13px 19px;transition:transform .15s ease,border-color .15s ease}
.core-alert{border:1px solid #f2d39a;background:var(--core-warn);color:#7a3d00;border-radius:18px;padding:16px 18px;margin:20px 0 0;box-shadow:0 10px 28px rgba(125,82,0,.05)}
.core-hero-visual{position:relative;z-index:2}.core-graph-card{background:rgba(255,255,255,.82);border:1px solid rgba(23,143,131,.16);border-radius:30px;box-shadow:0 24px 80px rgba(30,75,68,.16);padding:18px;backdrop-filter:blur(12px);transform:rotate(1.25deg)}
.core-graph-topline{display:flex;gap:7px;padding:5px 4px 15px}.core-graph-topline span{width:10px;height:10px;border-radius:50%;background:#cde4dc}.core-graph-topline span:nth-child(2){background:#b4dbd2}.core-graph-topline span:nth-child(3){background:#8dccbf}.core-graph-field{position:relative;min-height:330px;border-radius:22px;background:linear-gradient(160deg,#fafffc,#eef9f5);overflow:hidden;border:1px solid rgba(23,143,131,.10)}
.graph-node{position:absolute;z-index:2;display:inline-flex;align-items:center;justify-content:center;min-width:84px;padding:10px 12px;border-radius:999px;background:#fff;border:1px solid rgba(23,143,131,.18);box-shadow:0 14px 32px rgba(30,75,68,.12);font-size:13px;font-weight:900;color:#154b45}.graph-node::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--core-teal);margin-right:7px}.n1{left:34px;top:48px}.n2{right:38px;top:84px}.n3{left:110px;top:158px}.n4{right:52px;bottom:58px}.n5{left:34px;bottom:42px;background:#123b36;color:#fff}.n5::before{background:var(--core-mint)}
.graph-edge{position:absolute;height:2px;background:linear-gradient(90deg,rgba(23,143,131,.12),rgba(23,143,131,.72),rgba(23,143,131,.12));transform-origin:left center;z-index:1}.e1{width:175px;left:112px;top:82px;transform:rotate(12deg)}.e2{width:142px;left:156px;top:180px;transform:rotate(-24deg)}.e3{width:132px;left:94px;bottom:86px;transform:rotate(-31deg)}.e4{width:124px;right:108px;bottom:96px;transform:rotate(34deg)}
.core-solver-strip{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;border-radius:18px;background:#123b36;color:#dff8ef;padding:14px 16px}.core-solver-strip span{font-size:12px;text-transform:uppercase;letter-spacing:.14em;color:#aee8d8}.core-solver-strip strong{font-size:14px}
.core-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:22px 0 38px}.core-stat{background:var(--core-panel);border:1px solid var(--core-line);border-radius:24px;padding:20px;box-shadow:var(--core-shadow-soft);backdrop-filter:blur(12px)}.core-stat strong{display:block;font-size:26px;letter-spacing:-.04em}.core-stat span{display:block;color:var(--core-muted);font-size:14px;line-height:1.45;margin-top:5px}
.core-section{margin-top:42px}.core-section-heading{margin-bottom:18px}.core-section-heading.row{display:flex;align-items:end;justify-content:space-between;gap:24px}.core-section h2,.core-section-heading h2{font-size:clamp(30px,4vw,46px);line-height:1.05;margin:10px 0 0;letter-spacing:-.055em}.core-section-heading.row p{max-width:430px;color:var(--core-muted);line-height:1.6;margin:0}.core-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.core-feature-card{background:var(--core-panel);border:1px solid var(--core-line);border-radius:28px;padding:26px;box-shadow:var(--core-shadow-soft);backdrop-filter:blur(12px)}.core-feature-icon{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:16px;background:linear-gradient(145deg,#e7fbf4,#fff);border:1px solid rgba(23,143,131,.15);font-size:24px;font-weight:900;color:var(--core-teal-dark)}.core-feature-card h3{font-size:22px;margin:18px 0 8px;letter-spacing:-.03em}.core-feature-card p{margin:0;color:var(--core-muted);line-height:1.6}
.core-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.core-card{position:relative;overflow:hidden;background:var(--core-panel-solid);border:1px solid var(--core-line);border-radius:var(--core-radius);box-shadow:var(--core-shadow-soft);padding:24px;text-decoration:none;min-height:230px;display:flex;flex-direction:column;justify-content:space-between;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.core-card::after{content:"";position:absolute;right:-42px;top:-42px;width:112px;height:112px;border-radius:50%;background:rgba(23,143,131,.08);transition:transform .18s ease}.core-card:hover{transform:translateY(-4px);border-color:rgba(23,143,131,.34);box-shadow:0 24px 60px rgba(30,75,68,.14)}.core-card:hover::after{transform:scale(1.18)}.core-card.admin::after{background:rgba(59,114,246,.08)}.core-card h2{margin:18px 0 8px;font-size:25px;letter-spacing:-.04em}.core-card p{margin:0;color:var(--core-muted);line-height:1.58}.core-card-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.core-card-icon{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:15px;background:#eef9f5;border:1px solid rgba(23,143,131,.14);color:var(--core-teal-dark);font-weight:950}.core-tag{border:1px solid rgba(23,143,131,.14);background:#f4fbf8;color:var(--core-teal-dark);border-radius:999px;padding:6px 10px;font-size:12px;font-weight:950;white-space:nowrap}.core-card-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:24px;color:var(--core-teal-dark);font-weight:900}.core-muted{color:var(--core-muted)}
.core-footer{color:var(--core-muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:42px 0 10px}.core-footer a{font-weight:900;text-decoration:none;color:var(--core-teal-dark)}
@media(max-width:980px){.core-hero{grid-template-columns:1fr;min-height:0}.core-hero-visual{max-width:520px}.core-stats{grid-template-columns:repeat(2,1fr)}.core-feature-grid{grid-template-columns:1fr}.core-section-heading.row{align-items:flex-start;flex-direction:column}}
@media(max-width:760px){.core-topbar-inner,.core-shell{width:min(100% - 24px,1180px)}.core-topbar-inner{align-items:flex-start;flex-direction:column;padding:14px 0}.core-nav{justify-content:flex-start}.core-hero{padding:30px;border-radius:30px}.core-hero h1{font-size:42px}.core-hero p{font-size:17px}.core-stats{grid-template-columns:1fr}.core-graph-card{transform:none}.core-graph-field{min-height:280px}.graph-node{transform:scale(.9)}.n1{left:18px}.n2{right:20px}.n3{left:78px}.n4{right:24px}.n5{left:18px}.core-section h2,.core-section-heading h2{font-size:32px}}