:root{--font-geist-sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-geist-mono:ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;--background:#f4f7f6;--surface:#fff;--foreground:#17251f;--muted:#607068;--line:#dce5e0;--brand:#166a4b;--brand-dark:#0f4d37;--soft:#e7f3ed}*{box-sizing:border-box}html{background:var(--background);min-width:320px}body{min-height:100vh;color:var(--foreground);background:radial-gradient(circle at 10% 0%, #dcefe6 0, transparent 28rem), var(--background);-webkit-font-smoothing:antialiased;margin:0;font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}h1,h2,p{margin-top:0}h1{letter-spacing:-.045em;max-width:780px;margin-bottom:20px;font-size:clamp(2.25rem,6vw,4.6rem);line-height:1.03}.shell{width:min(1120px,100% - 40px);margin:0 auto}.landing{flex-direction:column;justify-content:center;min-height:100vh;padding:72px 0;display:flex}.landing-logo{width:min(180px,50vw);height:auto;margin-bottom:36px;display:block}.eyebrow{color:var(--brand);letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px;font-size:.78rem;font-weight:800;display:block}.lead{max-width:650px;color:var(--muted);margin-bottom:32px;font-size:1.15rem;line-height:1.7}.lead.compact{margin-bottom:28px}.actions{flex-wrap:wrap;gap:12px;display:flex}.button{border:1px solid #0000;border-radius:10px;justify-content:center;align-items:center;min-height:48px;padding:0 20px;font-weight:700;display:inline-flex}.button.primary{color:#fff;background:var(--brand)}.button.primary:hover{background:var(--brand-dark)}.button.secondary{border-color:var(--line);background:var(--surface)}.button.full{width:100%;margin:8px 0 20px}.centered{place-items:center;min-height:100vh;padding:48px 0;display:grid}.panel{border:1px solid var(--line);background:var(--surface);border-radius:18px;box-shadow:0 16px 60px #17251f14}.login-panel,.not-found{width:min(100%,480px);padding:clamp(28px,6vw,48px)}.login-logo{width:min(200px,100%);height:auto;margin-bottom:24px;display:block}.login-panel h1,.not-found h1,.detail-panel h1{font-size:clamp(2rem,5vw,3rem)}.login-panel h1{margin-bottom:16px}.login-panel p,.not-found p{color:var(--muted);line-height:1.6}.badge{width:fit-content;color:var(--brand-dark);background:var(--soft);border-radius:999px;padding:7px 11px;font-size:.78rem;font-weight:800;display:inline-flex}.field{margin:28px 0 12px;font-size:.84rem;font-weight:700}.login-panel input{border:1px solid var(--line);width:100%;color:var(--foreground);font:inherit;background:#f8faf9;border-radius:9px;margin:8px 0 16px;padding:14px;font-weight:400}.login-panel input:focus{border-color:var(--brand);outline:2px solid var(--soft)}.form-message{background:var(--soft);border-radius:9px;padding:12px;font-weight:700;color:var(--brand-dark)!important}.session-bar{border-bottom:1px solid var(--line);background:var(--surface);min-height:52px;color:var(--muted);justify-content:flex-end;align-items:center;gap:16px;padding:8px max(20px,50vw - 560px);font-size:.85rem;display:flex}.logout-button{border:1px solid var(--line);color:var(--brand);background:var(--surface);cursor:pointer;font:inherit;border-radius:8px;padding:8px 12px;font-weight:800}.text-link{color:var(--brand);font-weight:700}.text-link:hover{text-decoration:underline}.dashboard{padding:64px 0}.topbar,.detail-heading{justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.topbar h1{margin-bottom:8px;font-size:clamp(2.5rem,6vw,4rem)}.class-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:32px;display:grid}.class-card{border:1px solid var(--line);background:var(--surface);border-radius:16px;flex-direction:column;min-height:260px;padding:24px;display:flex}.class-card h2{margin:22px 0 8px;font-size:1.4rem}.class-card p{color:var(--muted)}.class-card .institution{margin-bottom:28px}.class-card a{color:var(--brand);margin-top:auto;font-weight:800}.period{color:var(--muted);letter-spacing:.08em;font-size:.78rem;font-weight:800}.back-link{margin-bottom:24px;display:inline-block}.detail-panel{padding:clamp(28px,6vw,52px)}.detail-heading p{color:var(--muted)}.details{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:36px 0;display:grid}.details div{border-top:1px solid var(--line);padding-top:16px}.details dt{color:var(--muted);margin-bottom:6px;font-size:.8rem;font-weight:700}.details dd{overflow-wrap:anywhere;margin:0;font-weight:700}.empty-state{background:var(--soft);border-radius:12px;padding:20px}.empty-state p{color:var(--muted);margin:6px 0 0;line-height:1.55}@media (max-width:780px){.class-grid,.details{grid-template-columns:1fr}.topbar,.detail-heading{flex-direction:column}}