.climate-milestones { margin:30px 0 40px; --lesson-accent:#82e5ef; scroll-margin-top:150px; }
.climate-milestones .lesson-heading h3 { margin:10px 0 18px; color:#eee8fa; font-size:clamp(28px,3.7vw,48px); line-height:1.16; font-weight:500; letter-spacing:-.035em; }
.climate-milestones .lesson-heading h3 em { color:#baa1fa; font-weight:400; }
.climate-milestones .milestone-dates { grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; margin:30px 0; padding-top:18px; border-top:1px solid #6a547f; }
.climate-milestones .milestone-dates button { min-width:0; min-height:116px; text-align:left; padding:18px 15px; }
.climate-milestones .milestone-dates span { display:block; color:#bdb0d2; font:12px/1.6 var(--mono); letter-spacing:.025em; }
.climate-milestones .milestone-dates strong { display:block; font-size:clamp(20px,2vw,26px); font-weight:500; line-height:1.4; margin:6px 0; }
.climate-milestones .milestone-dates small { display:block; color:#c8bdd5; font-size:14px; line-height:1.5; }
.climate-milestones .lesson-panels { border-top:1px solid rgba(183,155,222,.2); padding-top:24px; }
.climate-milestones .lesson-panels h4 { color:#eee7f8; font-size:clamp(23px,2.7vw,32px); font-weight:500; line-height:1.3; letter-spacing:-.02em; margin:0 0 18px; }
.climate-milestones .milestone-detail { display:grid; grid-template-columns:minmax(0,1.25fr) minmax(0,1fr); gap:30px; align-items:start; }
.climate-milestones .milestone-detail p { margin-top:0; }
.climate-milestones .lesson-panels a { min-height:48px; display:inline-flex; align-items:center; line-height:1.6; }
.climate-milestones .milestone-bars { margin:22px 0 10px; }
.climate-milestones .milestone-bars > div { display:grid; grid-template-columns:1fr auto; gap:7px 10px; margin:14px 0; font-size:14px; color:#c4b8d3; }
.climate-milestones .milestone-bars b { font:16px/1.5 var(--mono); color:#e1d6f7; }
.climate-milestones .milestone-bars i { display:block; grid-column:1/-1; height:10px; border-radius:8px; }
.climate-milestones .milestone-bar-full { width:100%; background:#a382ce; }
.climate-milestones .milestone-bar-cut { width:45%; background:#80e1e9; }
.climate-milestones .lesson-panels .milestone-equation { display:flex; align-items:center; justify-content:space-between; gap:14px; padding:16px 0; color:#bfeff0; font-size:16px; border-block:1px solid rgba(151,214,232,.2); }
.climate-milestones .milestone-equation b { color:#c5aafa; font-size:27px; font-weight:400; }
.climate-milestones .milestone-next { display:inline-flex; align-items:center; gap:16px; min-height:52px; padding:12px 0; margin-top:8px; color:#b8ecf0; font-size:16px; line-height:1.6; text-underline-offset:5px; }
@media(max-width:760px) {
  .climate-milestones .milestone-dates { grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; }
  .climate-milestones .milestone-detail { grid-template-columns:1fr; gap:10px; }
}
@media(max-width:420px) {
  .climate-milestones .milestone-dates button { padding:14px 11px; }
  .climate-milestones .milestone-dates strong { font-size:20px; }
  .climate-milestones .milestone-dates span { font-size:12px; letter-spacing:0; }
}