/* The living world frames a calm, source-first research desk. */
:root{--ink:#142d3a;--muted:#56636a;--line:#d3d5ce;--teal:#265f64;--copper:#8c542d;--gold:#8b682e;--academy-deep:#163b48}
.world-return{color:#f5e7c2;background:linear-gradient(90deg,#061524a3,#06152480),url('/art/world-1536.webp') center 44%/cover;border-bottom:1px solid #c6a76a88}
.world-return>.wrap{display:flex;min-height:117px;align-items:center;justify-content:space-between;gap:24px}
.world-return a{display:flex;align-items:center;gap:15px;font:32px/1 var(--serif);text-shadow:0 2px 8px #000}
.world-return-star{font:53px/1 var(--serif)}
.world-return small{display:block;font:8px/1.4 var(--mono);text-transform:uppercase;letter-spacing:2px;margin-top:8px;color:#f7e8c6}
.world-return p{font:10px/1.9 var(--mono);letter-spacing:2px;text-align:right;text-shadow:0 1px 6px #000}
.world-return p span{font:italic 20px/1.5 var(--serif);letter-spacing:0}
.topbar{background:#081b2af5;color:#f0e7d1;border-color:#a88b524d;backdrop-filter:blur(15px)}
.topbar .sigil,.topbar .sigil:before,.topbar .sigil:after{border-color:#dbbc7b}
.topbar .wordmark small{color:#c1cbd0}.topbar .icon-button{border-color:#bda16b88}.topbar .icon-button:hover{background:#254151;color:#fff}
.topbar .navlinks>a:hover,.topbar .navlinks>a[aria-current=page]{color:#f1ce88;border-color:#f1ce88}
.topbar .mobile-menu{background:#0d2536;color:#f0e7d1;border-color:#a88b5280}.topbar .mobile-menu a:hover{color:#f1ce88}
.topbar :focus-visible,.world-return :focus-visible,.footer :focus-visible{outline-color:#f4cf87}
.academy-hero{padding-top:66px;padding-bottom:50px}
.academy-hero-copy>h1 em{color:#885a31}
.academy-hero-lab{border:1px solid #b6bfb6;box-shadow:8px 8px 0 #ded9c9;background:#fffdf7;position:relative}
.academy-hero-lab:before{content:'';position:absolute;inset:6px;border:1px solid #d8c9a8;pointer-events:none}
.academy-facts{border-color:#b8bdaf}
.course-index{color:#956d37}.academy-courses{gap:0 52px}
.academy-practice-feature{background:radial-gradient(ellipse at 90% 20%,#32616b77,transparent 60%),#102d3d}
.academy-practice-feature .button{background:#efd3a2;color:#162d3b;border-color:#efd3a2}
.page-head,.academy-lesson-head{position:relative}
.page-head:after,.academy-lesson-head:after{content:'';position:absolute;right:0;bottom:-1px;height:2px;width:100px;background:#a67c3b}
.lab-directory-symbol{border:1px solid #b9c4bd;background:linear-gradient(140deg,#f9f6e9,#dce8e1);color:#244c56}
.feature-equation{background:#102d3d}
.footer{background:#081b2a;color:#eee2c9;padding:48px 0 30px;border-top:1px solid #ab8f5988}
.footer .muted,.footer-bottom{color:#b1c0c8}.footer-bottom{border-color:#af9b6b4d}.footer a:hover{color:#efd3a2}
.search-dialog{border-color:#b29a6c}.search-result h3{color:#163b48}
@media(max-width:680px){.world-return>.wrap{min-height:90px;gap:16px}.world-return a{font-size:26px;gap:9px}.world-return-star{font-size:37px}.world-return p{font-size:7px;letter-spacing:1px}.world-return p span{font-size:14px}.world-return small{font-size:7px;letter-spacing:1px}.academy-hero{padding-top:34px;padding-bottom:28px}.academy-hero-lab{box-shadow:5px 5px 0 #ded9c9}.footer{padding-top:32px}}
@media print{.world-return{display:none}.topbar,.footer{background:white;color:black}.footer *{color:black!important}.academy-hero-lab{box-shadow:none}}
.academy-lab .button.secondary{background:transparent;color:var(--ink);border-color:#8b9f96}.academy-lab .button.secondary:hover{background:#e5ece7;border-color:var(--ink)}