/* Shared navigation and visual language across public and learning pages. */
.site-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px;border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:0}
.site-header .brand{font:800 17px/1.5 system-ui,-apple-system,sans-serif;letter-spacing:-.03em;text-decoration:none;color:var(--ink)}
.site-header .brand small,.site-header .brand .muted{display:block;color:var(--muted);font:400 14px/1.7 system-ui,-apple-system,sans-serif;letter-spacing:0}
.site-header .logo{display:none}
.site-header nav,.site-footer nav{display:flex;align-items:center;gap:16px 20px;flex-wrap:wrap;font:400 15px/1.7 system-ui,-apple-system,sans-serif}
.site-header nav a,.site-header nav button,.site-footer a{color:#29483f;text-decoration:underline;text-underline-offset:4px}
.site-header nav button{font:inherit;background:none;border:0;border-radius:0;padding:0;min-height:0;text-align:left;cursor:pointer;overflow-wrap:anywhere;max-width:100%}
.site-header nav a:hover,.site-header nav button:hover{text-decoration-thickness:2px}
.site-header :focus-visible,.site-footer :focus-visible{outline:3px solid #29483f;outline-offset:5px}
.site-footer{border-top:1px solid var(--line);padding-top:24px;margin-top:48px}
.study-app{font:17px/1.7 system-ui,-apple-system,sans-serif}
.study-app .shell{max-width:1080px;padding-top:24px}
.study-app .lesson-wrap{max-width:100%;margin:auto}
.study-app .hero{background:transparent;color:var(--ink);padding:44px 0 28px;border-radius:0;min-height:0;overflow:visible}
.study-app .hero:after{display:none}.study-app .hero .eyebrow{color:#29483f}
.study-app .hero p{color:var(--muted);max-width:760px;font-size:17px}
.study-app h1{font-size:clamp(2.15rem,5vw,3.6rem);line-height:1.12;letter-spacing:-.04em;max-width:880px;margin:.35em 0}
.study-app h2{font-size:1.55rem;line-height:1.3;letter-spacing:normal;margin:0 0 20px}
.study-app h3{line-height:1.4;letter-spacing:normal}.study-app p{margin-bottom:14px}
.study-app .panel{border-radius:16px;box-shadow:none;margin:20px 0}
.study-app a{color:#29483f;text-underline-offset:4px}
.study-app .btn{font-weight:650;border-radius:10px;text-decoration:none}
.study-app .btn-primary{background:#29483f;color:white}.study-app .btn-secondary{background:transparent;color:#29483f;border:1px solid var(--line)}
.study-app .dashboard-courses{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.study-app .course-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:12px;padding:22px;min-width:0;margin:20px 0}
.study-app .dashboard-courses .course-card{margin:0}.study-app .course-card h3{font-size:22px;margin:10px 0}.study-app .course-card h3 a{text-decoration:none}
.study-app .course-card .row{margin-top:auto;padding-top:12px;flex-wrap:wrap}
.study-app .reading{line-height:1.75}.study-app .reading h2{margin-top:1.7em}.study-app .reading h3{margin-top:1.4em}
@media(max-width:640px){.site-header nav{gap:12px 18px;width:100%}.site-header nav a,.site-header nav button{padding:4px 0}.study-app .shell{padding:20px 20px 48px}.study-app .hero{padding-top:28px}.study-app .panel{padding:20px}.study-app .dashboard-courses{grid-template-columns:1fr}.study-app .course-card{padding:18px}.study-app .course-card .row .btn{width:100%}}