/* Education portal dev update (2026-10-16). Builds on news_receipts.css (.tr). */
.ed-doors{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:34px 0 8px;perspective:900px}
.ed-door{position:relative;aspect-ratio:3/4;border-radius:16px;overflow:hidden;border:1px solid var(--line2);background:radial-gradient(circle at 50% 70%,rgba(255,200,120,.55),rgba(255,107,74,.18) 55%,rgba(10,12,24,.9))}
.ed-door .in{position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,7,22,0) 45%,rgba(6,7,22,.92) 100%),var(--img) center/cover no-repeat;display:flex;flex-direction:column;justify-content:flex-end;padding:14px;font-size:13px;line-height:1.35;color:#fff;font-weight:600;letter-spacing:-.01em}
.ed-door .in small{display:block;font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.14em;color:rgba(255,255,255,.7);margin-bottom:6px;font-weight:500}
.ed-leaf{position:absolute;inset:0;transform-origin:0 50%;transform:rotateY(0);background:linear-gradient(160deg,#2a2f55,#14172f);border-right:1px solid rgba(255,255,255,.12);display:grid;place-items:center;backface-visibility:hidden}
.ed-leaf::after{content:"";width:9px;height:9px;border-radius:50%;background:var(--coral2);position:absolute;right:14px;top:50%;box-shadow:0 0 12px var(--coral2)}
.ed-leaf b{font-family:'JetBrains Mono',monospace;font-size:clamp(22px,4vw,40px);color:rgba(255,255,255,.35);letter-spacing:-.04em}
.ed-door.open .ed-leaf{transform:rotateY(-105deg);transition:transform 1s cubic-bezier(.2,.8,.2,1)}
.ed-cap{font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.08em;color:var(--muted);margin:10px 0 0}
.ed-list{list-style:none;margin:6px 0 0;padding:0;display:grid;gap:10px;max-width:680px}
.ed-list li{border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.01));border-radius:14px;padding:14px 18px;color:var(--ink);line-height:1.5;font-size:16px}
.ed-list a{color:var(--indigo2);font-weight:600;text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(158,164,255,.4)}
.ed-list span{display:block;color:var(--muted);font-size:14px;margin-top:2px}
.ed-pill{display:inline-block;font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:600;padding:7px 14px;border-radius:999px;color:var(--coral2);border:1px solid rgba(255,107,74,.4);background:rgba(255,107,74,.1)}
.ed-quote{margin:26px 0 0;font-size:clamp(20px,2.6vw,26px);letter-spacing:-.03em;font-weight:600;line-height:1.3;color:var(--text);max-width:24ch;border-left:3px solid var(--coral2);padding-left:18px}
.ed-faq{display:grid;gap:10px;max-width:760px;margin-top:22px}
.ed-faq details{border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.025);padding:0 18px}
.ed-faq summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:600;color:var(--text);font-size:17px;letter-spacing:-.02em}
.ed-faq summary::-webkit-details-marker{display:none}
.ed-faq summary::after{content:"+";float:right;color:var(--coral2)}
.ed-faq details[open] summary::after{content:"\2013"}
.ed-faq p{margin:0 0 16px;color:var(--ink2);line-height:1.65}
.ed-share{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.ed-share a,.ed-share button{font:inherit;font-size:14px;font-weight:600;color:var(--ink);background:rgba(255,255,255,.04);border:1px solid var(--line2);border-radius:999px;padding:10px 18px;cursor:pointer;text-decoration:none}
@media (max-width:760px){.ed-doors{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (prefers-reduced-motion:reduce){.ed-door .ed-leaf{transform:rotateY(-105deg)!important;transition:none!important}}
/* 2026-10-16 learn: doors link to their lesson pages */
.ed-door-a{display:block;min-width:0;border-radius:16px;text-decoration:none;color:inherit;transition:transform .3s cubic-bezier(.2,.8,.2,1)}
.ed-door-a:hover{transform:translateY(-4px)}
.ed-door-a:focus-visible{outline:2px solid var(--indigo2);outline-offset:3px}
.ed-cap a{color:var(--indigo2);text-decoration:underline;text-underline-offset:3px}