:root{
  --ink:#0e1c2b;          /* deep notebook navy */
  --ink-2:#132639;        /* raised panel */
  --grid:#1b3149;         /* faint plotted grid */
  --chalk:#f4f1e8;        /* warm chalk white */
  --slate:#93a7bd;        /* muted secondary */
  --gold:#e6b24a;         /* highlighted-solution accent */
  --gold-deep:#c8943a;
  --line:#22364c;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:var(--chalk);
  font-family:"Newsreader",Georgia,serif;
  font-size:19px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
.wrap{max-width:1060px;margin:0 auto;padding:0 28px}

/* faint coordinate grid over the whole page */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.28;
  mask-image:radial-gradient(circle at 50% 30%,#000 55%,transparent 90%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 55%,transparent 90%);
}
.layer{position:relative;z-index:1}

/* ---------- top bar ---------- */
.topbar{display:flex;justify-content:space-between;align-items:center;padding:26px 0;gap:16px;flex-wrap:wrap}
.brand{font-family:"Space Grotesk";font-weight:700;letter-spacing:.02em;font-size:20px;text-decoration:none;color:var(--chalk)}
.brand span.dot{color:var(--gold)}
.topbar-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
.topbar-signin{
  font-family:"Space Grotesk";font-weight:600;font-size:15px;color:var(--chalk);
  background:transparent;border:1px solid var(--line);text-decoration:none;
  padding:9px 16px;border-radius:2px;transition:border-color .15s ease,color .15s ease;
}
.topbar-signin:hover{border-color:var(--gold);color:var(--gold)}
.topbar-cta{
  font-family:"Space Grotesk";font-weight:600;font-size:15px;
  color:var(--ink);background:var(--gold);text-decoration:none;
  padding:10px 18px;border-radius:2px;transition:transform .15s ease,background .15s ease;
}
.topbar-cta:hover{background:var(--chalk);transform:translateY(-1px)}

/* ---------- hero ---------- */
.hero{padding:56px 0 34px;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.eyebrow{
  font-family:"Space Mono";font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);margin-bottom:22px;display:flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--gold);display:inline-block}
.hero h1{
  font-family:"Space Grotesk";font-weight:700;font-size:clamp(38px,5.4vw,62px);
  line-height:1.02;letter-spacing:-.02em;margin-bottom:22px;
}
.hero h1 em{font-family:"Newsreader";font-style:italic;font-weight:400;color:var(--gold)}
.hero p.lede{font-size:21px;color:#d7d2c4;max-width:34ch;margin-bottom:30px}
.hero-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.btn-primary{
  font-family:"Space Grotesk";font-weight:600;font-size:17px;
  background:var(--gold);color:var(--ink);text-decoration:none;
  padding:15px 28px;border-radius:2px;display:inline-block;
  box-shadow:0 0 0 0 rgba(230,178,74,.5);
  transition:transform .15s ease,box-shadow .3s ease,background .15s ease;
}
.btn-primary:hover{background:var(--chalk);transform:translateY(-2px);box-shadow:0 14px 34px -12px rgba(230,178,74,.55)}
.btn-ghost{font-family:"Space Grotesk";font-weight:500;font-size:16px;color:var(--slate);text-decoration:none;border-bottom:1px solid var(--line);padding-bottom:2px}
.btn-ghost:hover{color:var(--chalk)}

/* signature: the plotted curve */
.plot{width:100%;height:auto;filter:drop-shadow(0 8px 30px rgba(0,0,0,.4))}
.plot .axis{stroke:var(--line);stroke-width:1}
.plot .tick{stroke:var(--line);stroke-width:1}
.plot .curve{
  fill:none;stroke:var(--gold);stroke-width:3;stroke-linecap:round;
  stroke-dasharray:1400;stroke-dashoffset:1400;
  animation:draw 2.1s .3s cubic-bezier(.6,.02,.2,1) forwards;
}
.plot .dot{fill:var(--gold);opacity:0;animation:pop .4s 2.1s ease forwards}
.plot .lbl{font-family:"Space Mono";font-size:12px;fill:var(--slate)}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes pop{to{opacity:1}}

/* ---------- section frame ---------- */
section{padding:60px 0;border-top:1px solid var(--line);position:relative}
.sec-eyebrow{font-family:"Space Mono";font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);margin-bottom:18px}
.sec-title{font-family:"Space Grotesk";font-weight:600;font-size:clamp(26px,3.4vw,36px);letter-spacing:-.01em;margin-bottom:26px;max-width:20ch}

/* subjects */
.subject-columns{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px}
.subject-group{padding:22px 0;border-bottom:1px solid var(--line)}
.subject-group:last-child{border-bottom:none}
.subject-name{font-family:"Space Grotesk";font-weight:600;font-size:20px;margin-bottom:10px}
.topic-list{list-style:none;display:grid;gap:7px}
.topic-list li{font-family:"Space Mono";font-size:14px;color:var(--slate)}

/* about / credibility */
.about{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:start}
.about p{color:#d7d2c4;margin-bottom:18px;max-width:52ch}
.about-photo{width:100%;max-width:260px;border-radius:4px;border:1px solid var(--line);display:block;margin-bottom:24px}
.creds{list-style:none;border-left:2px solid var(--gold);padding-left:22px;display:grid;gap:20px}
.creds .k{font-family:"Space Mono";font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold);margin-bottom:3px}
.creds .v{font-family:"Space Grotesk";font-weight:500;font-size:17px;line-height:1.35}

/* how it works */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.step .num{font-family:"Space Mono";font-size:14px;color:var(--gold);margin-bottom:12px}
.step h3{font-family:"Space Grotesk";font-weight:600;font-size:19px;margin-bottom:8px}
.step p{font-size:16px;color:var(--slate)}

/* rate + CTA panel */
.cta-panel{
  background:var(--ink-2);border:1px solid var(--line);border-radius:4px;
  padding:46px;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-panel::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  background:radial-gradient(circle,rgba(230,178,74,.16),transparent 70%);
}
.rate{font-family:"Space Grotesk";font-weight:700;font-size:44px;letter-spacing:-.02em}
.rate small{font-family:"Space Mono";font-weight:400;font-size:15px;color:var(--slate);display:block;letter-spacing:.04em}
.cta-panel h2{font-family:"Space Grotesk";font-weight:600;font-size:26px;margin-bottom:8px}
.cta-panel p{color:var(--slate);font-size:16px}

.contact-note{font-family:"Space Mono";font-size:14px;color:var(--slate);margin-top:24px}
.contact-note a{color:var(--gold);text-decoration:none;border-bottom:1px solid var(--line)}
.contact-note a:hover{border-color:var(--gold)}

/* ---------- sign up / log in area ---------- */
.auth{max-width:660px;margin:0 auto}
.auth-block{padding:52px 0 10px;border-top:1px solid var(--line)}
.auth-block:first-of-type{border-top:1px solid var(--line)}
.auth-eyebrow{font-family:"Space Mono";font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);margin-bottom:14px}
.auth-title{font-family:"Space Grotesk";font-weight:600;font-size:clamp(24px,3vw,32px);letter-spacing:-.01em;margin-bottom:10px}
.auth-note{color:var(--slate);font-size:16px;margin-bottom:22px}
.auth-card{background:#fff;border-radius:10px;padding:28px;box-shadow:0 22px 55px -26px rgba(0,0,0,.55)}
.auth-card iframe{max-width:100%}

footer{padding:44px 0 60px;border-top:1px solid var(--line);color:var(--slate);font-size:15px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
footer a{color:var(--chalk);text-decoration:none;border-bottom:1px solid var(--line)}
footer a:hover{border-color:var(--gold)}

@media (max-width:820px){
  .hero{grid-template-columns:1fr;gap:26px}
  .hero .plot-wrap{order:-1}
  .subject-columns{grid-template-columns:1fr;gap:0}
  .about{grid-template-columns:1fr;gap:28px}
  .about-photo{max-width:200px;margin-left:auto;margin-right:auto}
  .steps{grid-template-columns:1fr}
  .cta-panel{grid-template-columns:1fr;text-align:left;padding:32px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .plot .curve{animation:none;stroke-dashoffset:0}
  .plot .dot{animation:none;opacity:1}
}
a:focus-visible,.btn-primary:focus-visible{outline:2px solid var(--gold);outline-offset:3px}