:root{--bg: #f5f7fb;--surface: #ffffff;--surface-alt: #f0f3fa;--border: #e2e6f0;--text: #1a1f36;--text-muted: #5b6478;--primary: #2b4bd8;--primary-hover: #1f3ac3;--primary-soft: #eaf0ff;--accent: #7c4dff;--ok: #17a673;--bad: #d94858;--warn: #d29b1d;--radius: 12px;--radius-sm: 8px;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 4px 12px rgba(15, 23, 42, .04);--shadow-hover: 0 6px 24px rgba(15, 23, 42, .08);--sidebar-w: 240px;--topbar-h: 60px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Helvetica Neue,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-size:15px;line-height:1.5}h1,h2,h3,h4{margin:0 0 8px;color:var(--text);line-height:1.25}h1{font-size:28px;font-weight:700}h2{font-size:20px;font-weight:700}h3{font-size:16px;font-weight:600}p{margin:0 0 12px}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.link{color:var(--primary);font-weight:500}.muted{color:var(--text-muted)}.ok{color:var(--ok)}.bad{color:var(--bad)}.shell{display:grid;grid-template-columns:var(--sidebar-w) 1fr;min-height:100vh}.sidebar{background:linear-gradient(180deg,#1f2a5b,#16204a);color:#dbe1f5;padding:20px 16px;display:flex;flex-direction:column;gap:20px;position:sticky;top:0;height:100vh}.sidebar__brand{display:flex;align-items:center;gap:12px}.sidebar__logo{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:700;font-size:15px;display:grid;place-items:center;box-shadow:0 2px 8px #00000040}.sidebar__brandText{display:flex;flex-direction:column}.sidebar__brandText strong{color:#fff;font-size:15px}.sidebar__brandText span{color:#a5b0d1;font-size:12px}.sidebar__nav{display:flex;flex-direction:column;gap:4px;margin-top:8px}.sidebar__link{color:#c7cee6;text-decoration:none;padding:10px 12px;border-radius:8px;font-size:14px;transition:background .15s,color .15s}.sidebar__link:hover{background:#ffffff0f;color:#fff;text-decoration:none}.sidebar__link--active{background:#ffffff1f;color:#fff}.sidebar__footer{margin-top:auto;font-size:12px;color:#7d88ab}.main{display:flex;flex-direction:column;min-width:0}.topbar{height:var(--topbar-h);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px;padding:0 24px;position:sticky;top:0;z-index:10}.topbar__title{font-weight:600}.topbar__menu{display:none;background:transparent;border:1px solid var(--border);border-radius:8px;width:40px;height:40px;padding:8px;cursor:pointer;flex-direction:column;justify-content:space-between;align-items:stretch}.topbar__menu span{display:block;height:2px;background:var(--text);border-radius:2px}.content{padding:24px;max-width:1200px;width:100%;margin:0 auto}.page{display:flex;flex-direction:column;gap:24px}.page__header{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}.section{display:flex;flex-direction:column;gap:12px}.section__title{font-size:18px;margin-bottom:0}.section__head{display:flex;justify-content:space-between;align-items:baseline}.hero{background:linear-gradient(135deg,#1f2a5b,#2b4bd8);color:#fff;padding:40px 32px;border-radius:16px}.hero__eyebrow{text-transform:uppercase;letter-spacing:.08em;opacity:.8;font-size:12px;margin-bottom:6px}.hero__title{color:#fff;font-size:34px;margin-bottom:8px}.hero__lead{color:#ffffffd9;max-width:640px}.btn{display:inline-block;padding:10px 16px;border-radius:8px;font-weight:500;cursor:pointer;border:1px solid transparent;font-size:14px}.btn--primary{background:var(--primary);color:#fff}.btn--primary:hover{background:var(--primary-hover);text-decoration:none}.btn--secondary{background:var(--surface);color:var(--text);border-color:var(--border)}.btn--secondary:hover{background:var(--surface-alt)}.input{padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;background:var(--surface);color:var(--text);min-width:200px}.input:focus{outline:2px solid var(--primary-soft);border-color:var(--primary)}.input-wrap{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--text-muted)}.input-wrap__label{font-weight:500}.filters{display:flex;gap:8px;flex-wrap:wrap}.grid{display:grid;gap:16px}.grid--stats{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.grid--cards{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow);transition:box-shadow .15s,transform .15s}.card:hover{box-shadow:var(--shadow-hover)}.card__eyebrow{font-size:12px;color:var(--primary);text-transform:uppercase;letter-spacing:.05em;font-weight:600}.card__title{margin:0}.card__footer{margin-top:auto;padding-top:12px;border-top:1px solid var(--border);font-size:13px}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:4px;box-shadow:var(--shadow)}.stat__icon{font-size:22px}.stat__value{font-size:24px;font-weight:700}.stat__label{color:var(--text-muted);font-size:13px}.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;background:var(--primary-soft);color:var(--primary);font-weight:500}.pill--muted{background:var(--surface-alt);color:var(--text-muted)}.pill--active,.pill--completed{background:#e0f5eb;color:var(--ok)}.pill--in_progress{background:#fff2d6;color:var(--warn)}.pill--upcoming{background:var(--surface-alt);color:var(--text-muted)}.pill--draft{background:#ffe6ea;color:var(--bad)}.pill--archived{background:var(--surface-alt);color:var(--text-muted)}.progress{position:relative;background:var(--surface-alt);border-radius:999px;height:10px}.progress__bar{background:linear-gradient(90deg,var(--primary),var(--accent));height:100%;border-radius:999px;transition:width .3s}.progress__text{position:absolute;right:0;top:-22px;font-size:12px;color:var(--text-muted)}.status{padding:16px;border-radius:var(--radius);background:var(--surface);border:1px dashed var(--border);text-align:center}.status--error{border-color:#f3c6cb;background:#fef1f3}.status--empty{color:var(--text-muted)}.status__title{font-weight:600;margin-bottom:4px}.status__message{color:var(--text-muted);font-size:14px}.status .btn{margin-top:10px}.row{display:flex;align-items:center;gap:8px}.row--between{justify-content:space-between;width:100%}.crumbs{font-size:13px}.lead{font-size:16px;line-height:1.6}.kv{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}.kv li{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid var(--border);font-size:14px}.kv li:last-child{border-bottom:0}.kv span{color:var(--text-muted)}.instructor__head{display:flex;align-items:center;gap:10px}.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:13px;font-weight:600;display:grid;place-items:center}.notfound{text-align:center;padding:60px 20px}.notfound__code{font-size:88px;font-weight:800;color:var(--primary);letter-spacing:-2px;line-height:1}@media (max-width: 820px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;width:260px;z-index:20;transform:translate(-100%);transition:transform .2s}.shell--open .sidebar{transform:translate(0);box-shadow:0 0 40px #0000004d}.topbar__menu{display:flex}.hero{padding:28px 20px}.hero__title{font-size:24px}.content{padding:16px}}