.landing{max-width:1100px;margin:0 auto;padding-block:56px 72px;padding-left:max(24px,env(safe-area-inset-left,0px));padding-right:max(24px,env(safe-area-inset-right,0px));display:flex;flex-direction:column;gap:56px}
.hero h1{font:400 clamp(44px,7vw,72px)/1.05 Georgia,"Times New Roman",serif;margin:10px 0 18px;letter-spacing:-.5px;text-wrap:balance}
.hero .lede{max-width:600px;font-size:18px;line-height:1.75;color:var(--muted);margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-actions a,.subject-go{display:inline-flex;align-items:center;text-decoration:none}
.continue-note{font-size:14px;color:var(--muted);margin:12px 0 0;min-height:1em}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.fact{padding:22px 4px;display:flex;flex-direction:column;gap:4px}
.fact+.fact{border-left:1px solid var(--line);padding-left:22px}
.fact strong{font:400 36px/1 Georgia,serif;color:var(--teal);font-variant-numeric:tabular-nums}
.fact span{font-size:13px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);font-weight:650}
.landing h2{font:400 30px/1.2 Georgia,serif;margin:0 0 20px}
.steps{list-style:none;counter-reset:step;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.steps li{counter-increment:step;display:flex;flex-direction:column;gap:6px;padding-top:14px;border-top:2px solid var(--teal)}
.steps li::before{content:counter(step,decimal-leading-zero);font-size:12px;letter-spacing:1.5px;color:var(--muted);font-weight:700}
.steps strong{font-size:18px}
.steps span{color:var(--muted);line-height:1.7;font-size:15px}
.subject-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.subject-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;display:flex;flex-direction:column;gap:12px;min-width:0}
.subject-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.subject-head h3{margin:0;font-size:20px}
.subject-course{font-size:12px;color:var(--muted);letter-spacing:.5px;white-space:nowrap}
.subject-meta{margin:0;color:var(--muted);font-size:14px}
.lecture-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column}
.lecture-list li{display:flex;align-items:center;gap:8px;padding:7px 0;border-top:1px solid #eef2ef;font-size:14px}
.lecture-list a{color:var(--ink);text-decoration:none;flex:1;min-width:0}
.lecture-list a:hover{color:var(--teal);text-decoration:underline}
.tag{font-size:10px;font-weight:750;letter-spacing:.8px;color:var(--teal);background:#e6efeb;border-radius:999px;padding:2px 7px}
.more-lectures summary{cursor:pointer;font-size:14px;font-weight:650;color:var(--teal);padding:4px 0}
.subject-go{align-self:flex-start;margin-top:auto}
@media(max-width:700px){.landing{padding-block:32px 48px;gap:40px}.facts{grid-template-columns:1fr 1fr}.fact:nth-child(3){border-left:0;padding-left:4px}.fact:nth-child(n+3){border-top:1px solid var(--line)}.fact strong{font-size:30px}.steps{grid-template-columns:1fr}.hero .lede{font-size:16px}}