:root{
  --bg:#0b0d12;
  --bg-soft:#0e1117;
  --sidebar:#11141b;
  --card:#151922;
  --card-hover:#1a1f2a;
  --border:#242938;
  --border-soft:#1c212e;
  --text:#eef0f5;
  --muted:#8b93a7;
  --muted-2:#5e6579;
  --accent:#6d5efc;
  --accent-2:#22d3ee;
  --accent-soft:rgba(109,94,252,.14);
  --success:#22c55e;
  --success-soft:rgba(34,197,94,.14);
  --danger:#f43f5e;
  --danger-soft:rgba(244,63,94,.14);
  --radius:16px;
  --radius-sm:10px;
  font-family:'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  background:
    radial-gradient(1100px 600px at 90% -10%, rgba(109,94,252,.14), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(34,211,238,.08), transparent 55%),
    var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
a{color:var(--accent-2); text-decoration:none;}
a:hover{text-decoration:underline;}
::selection{background:var(--accent); color:#fff;}

/* Deterrent: discourage casual text-copy on the dashboard, but keep
   normal selection/editing inside real form fields. */
body.protected{ -webkit-user-select:none; user-select:none; }
body.protected input, body.protected textarea, body.protected select{
  -webkit-user-select:text; user-select:text;
}
body.protected img{ -webkit-user-drag:none; user-drag:none; pointer-events:auto; }

/* ---------- App shell / sidebar layout ---------- */
.app-shell{display:flex; min-height:100vh;}
.sidebar{
  width:264px; flex-shrink:0; background:var(--sidebar); border-right:1px solid var(--border-soft);
  padding:26px 18px; position:fixed; top:0; left:0; bottom:0; display:flex; flex-direction:column;
  z-index:20;
}
.sidebar .brand{
  display:flex; align-items:center; gap:10px; padding:6px 10px 26px; font-weight:800; font-size:17px; letter-spacing:.2px;
}
.sidebar .brand .logo{
  width:34px; height:34px; border-radius:10px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2)); font-size:16px; color:#fff; font-weight:800;
  box-shadow:0 6px 18px rgba(109,94,252,.35); flex-shrink:0;
}
.sidebar .brand .logo svg{width:18px; height:18px;}
.sidebar nav{display:flex; flex-direction:column; gap:4px; flex:1;}
.sidebar nav a{
  display:flex; align-items:center; gap:12px; color:var(--muted); font-weight:600; font-size:14px;
  padding:11px 14px; border-radius:var(--radius-sm); transition:.15s;
}
.sidebar nav a svg{width:18px; height:18px; flex-shrink:0;}
.sidebar nav a:hover{background:var(--card); color:var(--text); text-decoration:none;}
.sidebar nav a.active{
  background:var(--accent-soft); color:#c9c3ff;
}
.sidebar nav a.active svg{color:var(--accent-2);}
.sidebar .side-footer{border-top:1px solid var(--border-soft); padding-top:16px; margin-top:10px;}
.sidebar .user-chip{display:flex; align-items:center; gap:10px; padding:8px 10px; border-radius:var(--radius-sm);}
.sidebar .avatar{
  width:34px; height:34px; border-radius:50%; background:linear-gradient(135deg,#3a3f55,#20242f);
  display:flex; align-items:center; justify-content:center; font-weight:700; font-size:13px; color:#fff; flex-shrink:0;
}
.sidebar .user-chip .name{font-size:13px; font-weight:600; color:var(--text);}
.sidebar .user-chip .role{font-size:11px; color:var(--muted-2);}
.sidebar .logout-link{
  display:flex; align-items:center; gap:10px; color:var(--danger); font-weight:600; font-size:13px;
  padding:10px 14px; margin-top:8px; border-radius:var(--radius-sm);
}
.sidebar .logout-link:hover{background:var(--danger-soft); text-decoration:none;}
.sidebar .logout-link svg{width:16px; height:16px;}

.main{margin-left:264px; padding:34px 42px 60px; width:100%; min-width:0;}
.page-head{display:flex; align-items:flex-end; justify-content:space-between; gap:16px; margin-bottom:24px; flex-wrap:wrap;}
.page-head h1{font-size:26px; margin:0 0 4px; font-weight:800; letter-spacing:-.3px;}
.page-head .sub{color:var(--muted); font-size:14px; margin:0;}

@media (max-width:900px){
  .sidebar{width:76px; padding:20px 10px; align-items:center;}
  .sidebar .brand{justify-content:center; padding:4px 0 22px;}
  .sidebar .brand span.txt{display:none;}
  .sidebar nav a span.txt{display:none;}
  .sidebar nav a{justify-content:center; padding:12px;}
  .sidebar .user-chip .name, .sidebar .user-chip .role{display:none;}
  .sidebar .logout-link span.txt{display:none;}
  .sidebar .logout-link{justify-content:center;}
  .main{margin-left:76px; padding:26px 20px 50px;}
}

/* ---------- Generic wrap (auth pages) ---------- */
.wrap{max-width:1080px; margin:0 auto; padding:24px;}
.wrap-narrow{max-width:420px; margin:0 auto; padding:24px;}

/* ---------- Banner ---------- */
.banner{
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  background:linear-gradient(120deg,#6d5efc 0%, #8f6bff 45%, #22d3ee 130%);
  color:#fff; border-radius:var(--radius); padding:20px 26px; margin-bottom:26px;
  font-size:15px; font-weight:700; box-shadow:0 14px 40px -12px rgba(109,94,252,.55);
  position:relative; overflow:hidden;
}
.banner::after{
  content:''; position:absolute; inset:0; background:radial-gradient(400px 200px at 90% -30%, rgba(255,255,255,.35), transparent 60%);
}
.banner span{position:relative;}
.banner a.btn{
  position:relative; background:rgba(255,255,255,.22); color:#fff; padding:10px 20px; border-radius:10px;
  font-weight:700; font-size:13px; white-space:nowrap; backdrop-filter:blur(4px);
  border:1px solid rgba(255,255,255,.3);
}
.banner a.btn:hover{background:rgba(255,255,255,.34); text-decoration:none;}

/* ---------- Cards ---------- */
.card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  padding:24px; margin-bottom:22px; box-shadow:0 1px 0 rgba(255,255,255,.02) inset;
}
.card h2{margin:0 0 4px; font-size:16px; font-weight:700;}
.card .sub{color:var(--muted); font-size:13px; margin-bottom:18px;}

.stat-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-bottom:22px;}
.stat-card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius); padding:20px 22px;
}
.stat-card .label{color:var(--muted); font-size:12px; font-weight:600; text-transform:uppercase; letter-spacing:.05em; margin-bottom:10px;}
.stat-card .value{font-size:30px; font-weight:800; letter-spacing:-.5px;}
.stat-card .value.accent{background:linear-gradient(120deg,var(--accent),var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent;}
@media (max-width:900px){ .stat-grid{grid-template-columns:1fr;} }

.grid-2{display:grid; grid-template-columns:1fr 1fr; gap:22px;}
@media (max-width:900px){ .grid-2{grid-template-columns:1fr;} }

/* ---------- Forms ---------- */
label{display:block; font-size:13px; font-weight:600; margin-bottom:7px; color:var(--text);}
input[type=text], input[type=password], input[type=url], textarea, select{
  width:100%; padding:12px 14px; border:1px solid var(--border); border-radius:var(--radius-sm);
  font-size:14px; background:var(--bg-soft); color:var(--text); margin-bottom:16px; font-family:inherit;
}
textarea{min-height:110px; resize:vertical;}
input::placeholder, textarea::placeholder{color:var(--muted-2);}
input:focus, textarea:focus, select:focus{outline:none; border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft);}

.btn{
  display:inline-block; background:linear-gradient(120deg,var(--accent),#8f6bff); color:#fff; border:none;
  padding:12px 22px; border-radius:var(--radius-sm); font-size:14px; font-weight:700; cursor:pointer;
  box-shadow:0 8px 20px -8px rgba(109,94,252,.6);
}
.btn:hover{filter:brightness(1.08);}
.btn.secondary{background:var(--card-hover); color:var(--text); border:1px solid var(--border); box-shadow:none;}
.btn.secondary:hover{background:#20263380; filter:none;}
.btn.danger{background:linear-gradient(120deg,#f43f5e,#fb7185); box-shadow:0 8px 20px -8px rgba(244,63,94,.5);}
.btn.small{padding:8px 14px; font-size:12px;}

.readonly-field{
  display:flex; align-items:center; gap:10px; background:var(--bg-soft); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:12px 14px; font-size:13px; font-family:'JetBrains Mono', Consolas, monospace;
  margin-bottom:16px; word-break:break-all;
}
.readonly-field span{flex:1;}
.copy-btn{
  border:none; background:linear-gradient(120deg,var(--accent),#8f6bff); color:#fff; border-radius:8px; padding:7px 12px;
  font-size:12px; font-weight:700; cursor:pointer; white-space:nowrap;
}
.copy-btn:hover{filter:brightness(1.08);}
.copy-btn.copied{background:var(--success); background-image:none;}

/* ---------- Tables ---------- */
table{width:100%; border-collapse:collapse; font-size:14px;}
th, td{text-align:left; padding:13px 10px; border-bottom:1px solid var(--border-soft);}
th{color:var(--muted); font-weight:700; font-size:11px; text-transform:uppercase; letter-spacing:.06em;}
tr:last-child td{border-bottom:none;}
tbody tr:hover{background:var(--card-hover);}

.badge{display:inline-block; padding:4px 11px; border-radius:100px; font-size:11px; font-weight:700;}
.badge.active{background:var(--success-soft); color:#4ade80;}
.badge.disabled{background:var(--danger-soft); color:#fb7185;}

/* ---------- Lessons ---------- */
.lesson-list{display:grid; gap:14px;}
.lesson-item{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius); padding:18px 20px;
  transition:.15s;
}
.lesson-item:hover{background:var(--card-hover); border-color:#2f3650;}
.lesson-item .icon{
  width:42px; height:42px; border-radius:12px; background:var(--accent-soft); display:flex; align-items:center;
  justify-content:center; flex-shrink:0; color:var(--accent-2);
}
.lesson-item .info{display:flex; align-items:center; gap:14px;}
.lesson-item .title{font-weight:700; font-size:14.5px;}
.lesson-item .meta{color:var(--muted); font-size:12px; margin-top:3px;}

/* ---------- Auth pages ---------- */
.login-card{
  background:var(--card); border:1px solid var(--border); border-radius:20px; padding:38px;
  margin-top:min(12vh,90px); box-shadow:0 30px 60px -20px rgba(0,0,0,.5);
}
.login-card .logo{
  width:46px; height:46px; border-radius:13px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2)); font-weight:800; color:#fff; margin-bottom:18px;
  box-shadow:0 10px 26px -8px rgba(109,94,252,.55);
}
.login-card .logo svg{width:24px; height:24px;}
.login-card h1{font-size:21px; margin:0 0 5px; font-weight:800;}
.login-card p{color:var(--muted); font-size:13.5px; margin:0 0 26px;}

.alert{padding:11px 15px; border-radius:var(--radius-sm); font-size:13px; margin-bottom:18px; font-weight:600;}
.alert.error{background:var(--danger-soft); color:#fb7185;}
.alert.success{background:var(--success-soft); color:#4ade80;}

.helper{font-size:12px; color:var(--muted-2); margin-top:-10px; margin-bottom:16px;}
.helper code{background:var(--bg-soft); padding:2px 6px; border-radius:5px; color:var(--accent-2);}

.empty-state{color:var(--muted); font-size:14px; padding:20px 0;}