:root{
  --bg:#0b0b0e;--panel:#17171d;--panel2:#23232d;--line:#333341;
  --red:#df0000;--redDark:#8f0000;--text:#f4f4f4;--muted:#aaa;
  --green:#39d98a;--yellow:#f4b942;
}
*{box-sizing:border-box}
body{margin:0;background:radial-gradient(circle at 80% -20%,#380000 0,#0b0b0e 38%);color:var(--text);font-family:Arial,Helvetica,sans-serif}
.layout{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.sidebar{background:#101015;border-right:1px solid var(--line);padding:20px;position:sticky;top:0;height:100vh}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:52px;height:52px;object-fit:contain;border-radius:12px}
.brand h1{margin:0;font-size:24px}.brand small{color:var(--muted)}
.logo-wide{width:100%;max-height:70px;object-fit:contain;margin:18px 0;padding:8px;background:#08080b;border:1px solid var(--line);border-radius:14px}
nav a{display:block;color:#ddd;text-decoration:none;padding:12px;border-radius:12px;margin:6px 0;font-weight:bold}
nav a:hover{background:linear-gradient(90deg,rgba(223,0,0,.28),rgba(255,255,255,.04))}
.main{padding:26px 32px}
.card{background:rgba(23,23,29,.96);border:1px solid var(--line);border-radius:18px;padding:22px;margin-bottom:18px;box-shadow:0 12px 36px rgba(0,0,0,.2)}
h2{font-size:32px;margin:0 0 8px}.muted{color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.kpi{font-size:34px;font-weight:900;margin:6px 0}
.btn{display:inline-block;background:var(--red);color:white;border:0;border-radius:12px;padding:13px 17px;font-weight:800;text-decoration:none;cursor:pointer}
.btn.secondary{background:var(--panel2)}
input,select,textarea{width:100%;background:#0f0f14;color:white;border:1px solid var(--line);border-radius:12px;padding:12px;margin:6px 0 14px}
label{font-weight:bold}
.table{width:100%;border-collapse:collapse}.table th,.table td{border-bottom:1px solid var(--line);padding:12px;text-align:left}
.progress{height:12px;background:#30303a;border-radius:999px;overflow:hidden}.fill{height:100%;background:var(--red)}.green{background:var(--green)}.yellow{background:var(--yellow)}
.alert{background:#111116;border-left:5px solid var(--red);padding:14px;border-radius:12px}
@media(max-width:900px){.layout{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.grid{grid-template-columns:1fr}}

.version-pill{display:inline-block;background:rgba(223,0,0,.18);border:1px solid var(--redDark);padding:7px 10px;border-radius:999px;color:#ffdada;font-size:12px;font-weight:bold}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.section-title{display:flex;justify-content:space-between;gap:12px;align-items:center}


.course-path{display:flex;flex-direction:column;gap:16px;position:relative;margin-top:10px}
.course-item{display:grid;grid-template-columns:60px 1fr;gap:16px;align-items:start;position:relative}
.course-item:not(:last-child)::after{content:'';position:absolute;left:28px;top:52px;width:4px;height:calc(100% + 12px);background:#2f2f38;border-radius:999px}
.course-badge{width:56px;height:56px;border-radius:999px;display:flex;align-items:center;justify-content:center;font-weight:900;border:1px solid var(--line);background:#15151b}
.course-body{background:rgba(17,17,22,.96);border:1px solid var(--line);border-radius:16px;padding:18px}
.course-body h4{margin:0 0 10px;font-size:24px}
.course-body p{margin:8px 0}
.course-code{color:#ffdada;font-weight:bold;letter-spacing:.06em}
.course-item.done .course-badge{background:var(--green);color:#08110d;border-color:#27885b}
.course-item.current .course-badge{background:var(--red);color:#fff;border-color:var(--redDark)}
.course-item.current .course-body{border-color:var(--redDark);box-shadow:0 0 0 1px rgba(223,0,0,.2)}
.course-item.locked .course-badge{opacity:.75}
.course-item.locked .course-body{opacity:.82}