:root{
  --brand:#0b7a75;
  --muted:#859998;
  --ink:#0f172a;
  --bg:#f6f8f7;
  --card:#ffffff;
  --line:rgba(15,23,42,.10);
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);
  background:linear-gradient(180deg, #ffffff 0%, var(--bg) 70%);
}

a{color:inherit;text-decoration:none}
code{background:rgba(11,122,117,.10); padding:2px 6px; border-radius:8px}

.app{min-height:100%; display:flex; flex-direction:column}

.topbar{
  position:sticky; top:0; z-index:10;
  background:rgba(255,255,255,.88);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 16px;
  gap:10px;
}

.brand{display:flex; gap:10px; align-items:center; min-width:180px}
.logoDot{
  width:34px;height:34px;border-radius:12px;
  background: radial-gradient(circle at 30% 30%, rgba(11,122,117,.25), rgba(11,122,117,1));
}
.brandName{font-weight:900; letter-spacing:.2px}
.brandSub{font-size:12px; color:rgba(15,23,42,.55)}

.nav{display:flex; gap:6px; align-items:center; flex-wrap:wrap; justify-content:center}
.navLink{
  padding:8px 10px;
  border-radius:12px;
  color:rgba(15,23,42,.70);
}
.navLink.active{
  background:rgba(11,122,117,.10);
  color:var(--brand);
  font-weight:800;
}

.actions{display:flex; gap:10px; align-items:center}

.container{width:min(1050px, 100%); margin:0 auto; padding:18px 16px 28px}

.hero{
  padding:22px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(135deg, rgba(11,122,117,.10), rgba(133,153,152,.08));
  box-shadow: var(--shadow);
}
.hero h1{margin:0 0 8px; font-size:28px}
.hero p{margin:0 0 14px; color:rgba(15,23,42,.68); line-height:1.45}
.heroBtns{display:flex; gap:10px; flex-wrap:wrap}

.pageHead h1{margin:8px 0 6px}
.muted{color:rgba(15,23,42,.60)}

.grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap:14px;
  margin-top:14px;
}
@media (max-width:820px){
  .grid{grid-template-columns:1fr}
  .brand{min-width:auto}
}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px;
  box-shadow: var(--shadow);
}
.cardTitle{font-weight:900; margin-bottom:10px}
.list{margin:10px 0 0; padding-left:18px; color:rgba(15,23,42,.72)}
.list li{margin:6px 0}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  height:40px; padding:0 14px;
  border-radius:14px;
  border:1px solid rgba(11,122,117,.28);
  background:var(--brand);
  color:white; font-weight:900;
  cursor:pointer;
}
.btn.ghost{
  background:white;
  color:var(--brand);
}
.btn:disabled{opacity:.6; cursor:not-allowed}
.btn:active{transform: translateY(1px)}

.tiles{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:10px}
.tile{
  padding:14px;
  border-radius:16px;
  border:1px solid var(--line);
  background:linear-gradient(180deg, #fff, rgba(11,122,117,.04));
}
.tileTop{font-weight:900}
.tileSub{font-size:12px; margin-top:6px}

.statusRow{display:flex; align-items:center; gap:10px; margin:8px 0 10px}
.chip{
  display:inline-flex; align-items:center;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.85);
  font-weight:900;
}
.chip.ok{background:rgba(11,122,117,.10); color:var(--brand)}

.smallGrid{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; margin-top:12px}
.mini{
  border:1px solid var(--line);
  border-radius:16px;
  padding:12px;
  background:rgba(15,23,42,.02);
}
.miniK{font-size:12px; color:rgba(15,23,42,.55); font-weight:800}
.miniV{font-size:16px; font-weight:900; margin-top:2px}

.courseCards{display:grid; grid-template-columns:1fr; gap:10px}
.courseCard{
  border:1px solid var(--line);
  border-radius:16px;
  padding:14px;
  background:linear-gradient(180deg, #fff, rgba(133,153,152,.06));
}
.courseTop{display:flex; align-items:center; gap:10px; margin-bottom:6px}
.badge{
  display:inline-flex; align-items:center;
  padding:4px 10px;
  border-radius:999px;
  font-weight:900;
  background:rgba(11,122,117,.10);
  color:var(--brand);
  border:1px solid rgba(11,122,117,.18);
  font-size:12px;
}
.courseActions{display:flex; gap:10px; margin-top:12px; flex-wrap:wrap}

.field{display:block}
.fieldLbl{display:block; font-weight:900; margin-bottom:6px}
.input{
  width:100%;
  height:42px;
  border-radius:14px;
  border:1px solid var(--line);
  padding:0 12px;
  font-size:14px;
  outline:none;
}
.tableWrap{overflow:auto; border-radius:16px; border:1px solid var(--line)}
.table{width:100%; border-collapse:collapse; min-width:640px; background:#fff}
.table th, .table td{padding:12px 12px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
.table th{font-size:12px; color:rgba(15,23,42,.60); letter-spacing:.2px; text-transform:uppercase}
.tMain{font-weight:900}
.tSub{font-size:12px; margin-top:4px}

.pill{
  display:inline-flex;
  padding:5px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  font-weight:900;
  font-size:12px;
  background:rgba(15,23,42,.02);
}
.pill.ok{background:rgba(11,122,117,.10); color:var(--brand); border-color:rgba(11,122,117,.18)}
.pill.warn{background:rgba(245,158,11,.12); color:#7a4c00; border-color:rgba(245,158,11,.22)}
.pill.err{background:rgba(239,68,68,.12); color:#7a0000; border-color:rgba(239,68,68,.20)}

.footer{
  margin-top:auto;
  padding:16px;
  border-top:1px solid var(--line);
  color:rgba(15,23,42,.60);
  display:flex; justify-content:space-between; gap:10px;
}
.toast{
  position:fixed; left:50%; bottom:18px; transform:translateX(-50%);
  background:#0f172a; color:#fff;
  padding:10px 14px; border-radius:14px;
  box-shadow:0 14px 40px rgba(15,23,42,.25);
  opacity:0; pointer-events:none;
  transition:opacity .18s ease, transform .18s ease;
}
.toast.show{opacity:1; transform:translateX(-50%) translateY(-2px)}
/* ===================== Sidebar layout (v2) ===================== */
.layout{
  min-height:100%;
  display:grid;
  grid-template-columns: 280px 1fr;
}
.sidebar{
  position:sticky; top:0;
  height:100vh;
  padding:14px;
  border-right:1px solid var(--line);
  background:rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  display:flex;
  flex-direction:column;
  gap:12px;
}
.sbHead{display:flex; align-items:flex-start; justify-content:space-between; gap:10px}
.sbNav{display:flex; flex-direction:column; gap:6px; margin-top:4px}
.sbLink{
  padding:10px 12px;
  border-radius:14px;
  color:rgba(15,23,42,.72);
  border:1px solid transparent;
}
.sbLink:hover{background:rgba(15,23,42,.03); border-color:rgba(15,23,42,.06)}
.sbLink.active{
  background:rgba(11,122,117,.10);
  border-color:rgba(11,122,117,.18);
  color:var(--brand);
  font-weight:900;
}
.sbFoot{margin-top:auto; padding-top:10px; border-top:1px solid var(--line)}
.main{min-width:0}

/* Mobile topbar + overlay */
.mTopbar{
  display:none;
  position:sticky; top:0; z-index:20;
  background:rgba(255,255,255,.90);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
  padding:10px 12px;
  align-items:center;
  gap:10px;
}
.mBrand{display:flex; align-items:center; gap:10px}
.logoDot.sm{width:26px;height:26px;border-radius:10px}

.iconBtn{
  width:40px;height:40px;
  border-radius:14px;
  border:1px solid var(--line);
  background:#fff;
  font-weight:900;
  cursor:pointer;
}
.overlay{
  display:none;
  position:fixed; inset:0;
  background:rgba(15,23,42,.35);
  z-index:15;
}

/* Pills (extend) */
.pill{display:inline-flex; padding:6px 10px; border-radius:999px; border:1px solid var(--line); font-weight:900; font-size:12px; background:rgba(15,23,42,.02)}
.pill.ok{background:rgba(11,122,117,.10); color:var(--brand); border-color:rgba(11,122,117,.18)}
.pill.warn{background:rgba(245,158,11,.12); color:#7a4c00; border-color:rgba(245,158,11,.22)}
.pill.err{background:rgba(239,68,68,.12); color:#7a0000; border-color:rgba(239,68,68,.20)}

/* Responsive: sidebar becomes drawer */
@media (max-width: 920px){
  .layout{grid-template-columns:1fr}
  .mTopbar{display:flex}
  .sidebar{
    position:fixed; left:-320px; top:0;
    width:300px; max-width:86vw;
    z-index:30;
    transition:left .18s ease;
    border-right:1px solid var(--line);
    box-shadow: 0 20px 60px rgba(15,23,42,.25);
  }
  .layout.navOpen .sidebar{left:0}
  .layout.navOpen .overlay{display:block}
  .closeOnly{display:inline-flex}
}
@media (min-width: 921px){
  .closeOnly{display:none}
}