.platform-proof-intro{display:flex;align-items:flex-start;gap:16px;padding:24px 0 0;font-size:14px;line-height:1.9;color:var(--muted)}.platform-proof-intro>svg{width:25px;height:25px;color:var(--green);margin-top:4px}.platform-proof-intro strong{color:var(--ink);font-weight:650}.proof-viewer{margin-top:35px;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--soft)}.proof-tabs{display:grid;grid-template-columns:repeat(4,1fr);background:white;border-bottom:1px solid var(--line)}.proof-tabs>button{border:0;border-right:1px solid var(--line);padding:18px 12px;background:white;display:flex;align-items:center;justify-content:center;gap:9px;font-size:13px;color:var(--muted);font-weight:600;min-height:58px}.proof-tabs>button:last-child{border-right:0}.proof-tabs>button[aria-pressed=true]{background:var(--forest);color:white}.proof-tabs svg{width:17px;height:17px}.proof-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:7px 14px 7px 22px;font-size:12px;background:#edf2ec;border-bottom:1px solid var(--line)}.proof-toolbar .icon-button{width:32px;height:32px}.proof-toolbar svg{width:16px;height:16px}.proof-image-wrap{background:white;aspect-ratio:1440/1000;overflow:hidden}.proof-image-wrap>img{width:100%;height:100%;object-fit:contain;display:block}.proof-caption{border-top:1px solid var(--line);padding:16px 22px;line-height:1.7;font-size:12px}.proof-data-note{display:block;color:var(--muted);font-size:10px;margin-top:6px}.proof-functions{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;margin-top:35px}.proof-functions>article{border-top:1px solid var(--line);padding-top:23px}.proof-functions>article>span{font-size:11px;color:var(--green);font-weight:650}.proof-functions h3{font-size:19px;font-weight:650;margin:12px 0 10px}.proof-functions p{font-size:13px;color:var(--muted);line-height:1.8}.platform-links{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:30px}.platform-staff-link{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted)}.platform-staff-link svg{width:13px;height:13px}.instructor-alias{font-size:18px;font-weight:500;color:var(--muted);vertical-align:middle;margin-left:10px}.instructor-keyproof{display:grid;grid-template-columns:1fr 1.4fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:23px 0;gap:20px;margin:28px 0}.instructor-keyproof>div+div{border-left:1px solid var(--line);padding-left:24px}.instructor-keyproof strong{display:block;font-size:24px;color:var(--green);line-height:1.4;margin-bottom:8px}.instructor-keyproof>div+div strong{font-size:18px}.instructor-keyproof span{font-size:11px;line-height:1.7;color:var(--muted)}.instructor-background{margin-top:32px;font-size:12px;line-height:1.9}.instructor-background>span{font-weight:650}.instructor-background p{color:var(--muted);margin-top:9px}.instructor-background small{font-size:10px;line-height:1.8;display:block;color:var(--muted);margin-top:12px}.teaching-cases{grid-column:1/-1;border-top:1px solid var(--line);padding-top:50px;margin-top:5px}.teaching-cases-heading h3{font-size:27px;font-weight:650;line-height:1.5;margin-top:18px}.teaching-case-list{margin-top:35px;border-top:1px solid var(--ink)}.teaching-case-list article{display:grid;grid-template-columns:1fr 1.45fr;gap:50px;padding:28px 0;border-bottom:1px solid var(--line)}.case-category{font-size:10px;color:var(--green);font-weight:650}.teaching-case-list h4{font-size:19px;line-height:1.5;margin:9px 0 8px;font-weight:650}.case-role{font-size:11px;color:var(--muted)}.teaching-case-list article>p{font-size:13px;line-height:1.95;color:var(--muted);align-self:center}.proof-dialog{border:0;border-radius:6px;width:min(1240px,95vw);max-width:95vw;max-height:95svh;padding:0;background:white;color:var(--ink)}.proof-dialog::backdrop{background:#0c2119bd}.proof-dialog-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:13px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:white;z-index:1;font-size:13px}.proof-dialog>img{display:block;width:100%;height:auto}.proof-dialog>p{font-size:11px;color:var(--muted);padding:16px 20px;line-height:1.7}
@media(max-width:1050px){.proof-tabs>button{font-size:11px;gap:6px}.teaching-case-list article{gap:30px}.instructor-keyproof{grid-template-columns:1fr 1.3fr;gap:10px}.instructor-keyproof>div+div{padding-left:16px}.instructor-keyproof>div+div strong{font-size:16px}}
@media(max-width:720px){.platform-proof-intro{gap:11px;font-size:12px;padding-top:22px}.platform-proof-intro>svg{width:21px;height:21px}.proof-viewer{margin-top:25px}.proof-tabs{grid-template-columns:1fr 1fr}.proof-tabs>button{font-size:10px;min-height:47px;padding:12px 8px}.proof-tabs>button:nth-child(-n+2){border-bottom:1px solid var(--line)}.proof-tabs>button:nth-child(2){border-right:0}.proof-toolbar{font-size:10px;padding-left:12px}.proof-image-wrap{aspect-ratio:1.2;overflow-x:auto;overflow-y:hidden}.proof-image-wrap>img{width:145%;max-width:none;object-fit:contain;object-position:top left;height:auto}.proof-caption{padding:13px 12px;font-size:10px}.proof-data-note{font-size:9px}.proof-functions{grid-template-columns:1fr;gap:19px;margin-top:25px}.proof-functions>article{padding-top:19px}.proof-functions h3{font-size:17px;margin:9px 0}.proof-functions p{font-size:12px}.proof-functions p>br{display:none}.platform-links{flex-direction:column;align-items:flex-start;gap:18px}.platform-staff-link{font-size:10px}.instructor-keyproof{grid-template-columns:1fr 1.4fr;gap:15px;padding:20px 0;margin:24px 0}.instructor-keyproof strong{font-size:25px}.instructor-keyproof>div+div strong{font-size:16px}.instructor-keyproof span{font-size:10px}.instructor-alias{font-size:15px}.instructor-background{font-size:11px;margin-top:26px}.instructor-background small{font-size:9px}.teaching-cases{padding-top:30px;margin-top:0}.teaching-cases-heading h3{font-size:22px;margin-top:15px}.teaching-case-list{margin-top:25px}.teaching-case-list article{grid-template-columns:1fr;gap:15px;padding:23px 0}.teaching-case-list h4{font-size:18px;margin:8px 0 7px}.teaching-case-list article>p{font-size:12px;line-height:1.9}.case-role{font-size:10px}.proof-dialog-header{font-size:11px;padding:10px 13px}.proof-dialog>p{font-size:9px;padding:13px}.proof-dialog{width:96vw;max-width:96vw}}