@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
:root{--sidebar:260px;--bg:#f5f7fb;--ink:#172033;--muted:#6b7280;--primary:#2563eb}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,sans-serif}
.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);background:#101827;color:#cbd5e1;padding:22px 16px;z-index:10}
.brand{display:flex;align-items:center;gap:12px;padding:4px 10px 28px;color:white}.brand small{display:block;color:#94a3b8;font-size:11px;margin-top:2px}.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#2563eb,#7c3aed);display:grid;place-items:center;font-weight:800;color:white}
.sidebar nav a{display:flex;gap:12px;align-items:center;color:#94a3b8;text-decoration:none;padding:11px 12px;border-radius:10px;margin:3px 0;font-size:14px}.sidebar nav a:hover{background:#1d2939;color:white}.nav-label{font-size:10px;letter-spacing:1.4px;color:#64748b;font-weight:700;padding:18px 12px 7px}
.main{margin-left:var(--sidebar);min-height:100vh}.topbar{height:70px;background:white;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;padding:0 30px}.content{padding:30px}.cardx{background:white;border:1px solid #e8ebf0;border-radius:16px;padding:22px;box-shadow:0 4px 18px rgba(15,23,42,.03)}
.stat{display:flex;align-items:center;justify-content:space-between}.stat-icon{width:46px;height:46px;border-radius:13px;background:#eff6ff;color:#2563eb;display:grid;place-items:center;font-size:20px}
.hero{background:linear-gradient(120deg,#172554,#2563eb);color:white;border-radius:20px;padding:30px;position:relative;overflow:hidden}.hero:after{content:'';position:absolute;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.08);right:-90px;top:-120px}
.progress{height:8px;border-radius:99px}.lesson-thumb{background:#111827;border-radius:14px;aspect-ratio:16/9;display:grid;place-items:center;color:white;font-size:42px}.table>:not(caption)>*>*{padding:14px 10px}
.login-page{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;background:#0b1220}.login-visual{padding:70px;color:white;display:flex;align-items:center;background:radial-gradient(circle at 70% 30%,#263c77,transparent 40%),linear-gradient(135deg,#0b1220,#111d36)}.login-card{background:white;padding:45px;display:flex;align-items:center}.login-card form{width:min(430px,100%);margin:auto}.form-control,.form-select{padding:11px 13px;border-radius:10px}.btn{border-radius:10px}.kpi{font-size:28px;font-weight:800}.muted{color:var(--muted)}
@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:.2s}.sidebar.open{transform:translateX(0)}.main{margin-left:0}.content{padding:18px}.topbar{padding:0 18px}.login-page{grid-template-columns:1fr}.login-visual{display:none}}