:root{
  --bg:#050814;
  --fg:#f9fafb;
  --muted:#9ca3af;
  --card:#0f172a;
  --accent:#22c55e;
  --accent-soft:#064e3b;
  --danger:#ef4444;
  --radius:18px;
  --pad:18px;
  --shadow:0 18px 40px rgba(0,0,0,0.45);
  --font:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;}
body.ki-body{
  background:radial-gradient(circle at top,#1e293b,#020617 60%);
  color:var(--fg);
  font-family:var(--font);
}
.ki-shell{
  min-height:100vh;
  padding:18px;
  padding-bottom:calc(18px + env(safe-area-inset-bottom,0));
  max-width:540px;
  margin:0 auto;
}
.ki-header{
  text-align:left;
  margin-bottom:18px;
}
.ki-header h1{
  font-size:24px;
  font-weight:700;
  margin-bottom:4px;
}
.ki-header p{
  font-size:14px;
  color:var(--muted);
}
.ki-main{
  background:rgba(15,23,42,0.9);
  border-radius:24px;
  padding:var(--pad);
  box-shadow:var(--shadow);
  border:1px solid rgba(148,163,184,0.25);
}
.ki-form{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.ki-form label span{
  font-size:13px;
  color:var(--muted);
  display:block;
  margin-bottom:4px;
}
.ki-form input{
  width:100%;
  padding:10px 12px;
  border-radius:999px;
  border:1px solid #1e293b;
  background:#020617;
  color:var(--fg);
  font-size:14px;
}
.ki-form input:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 0 0 1px rgba(34,197,94,0.5);
}
.ki-btn-primary{
  margin-top:6px;
  width:100%;
  padding:11px 14px;
  border-radius:999px;
  border:none;
  background:linear-gradient(135deg,#22c55e,#4ade80);
  color:#022c22;
  font-weight:600;
  font-size:15px;
}
.ki-btn-primary:active{
  transform:scale(0.97);
}
.ki-alert{
  border-radius:14px;
  padding:10px 12px;
  font-size:13px;
  margin-bottom:10px;
}
.ki-alert-error{
  background:rgba(248,113,113,0.12);
  border:1px solid rgba(248,113,113,0.4);
  color:#fecaca;
}
.ki-alert-ok{
  background:rgba(52,211,153,0.12);
  border:1px solid rgba(52,211,153,0.4);
  color:#a7f3d0;
}
.ki-muted{
  color:var(--muted);
  font-size:13px;
}
.ki-island-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(120px,1fr));
  gap:10px;
}
.ki-island-card{
  border-radius:18px;
  border:1px solid rgba(148,163,184,0.35);
  background:radial-gradient(circle at top,var(--accent-soft),#020617 70%);
  padding:12px;
  text-align:left;
  color:var(--fg);
  font-size:14px;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.ki-island-pill{
  display:inline-block;
  font-size:11px;
  padding:3px 8px;
  border-radius:999px;
  background:rgba(15,23,42,0.85);
  border:1px solid rgba(148,163,184,0.4);
  color:var(--muted);
}
.ki-island-card h2{
  font-size:15px;
}
.ki-lessons{
  margin-top:18px;
}
.ki-lessons h2{
  font-size:18px;
  margin-bottom:8px;
}
.ki-lesson-list{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.ki-lesson-card{
  border-radius:16px;
  border:1px solid rgba(148,163,184,0.35);
  background:#020617;
  padding:10px 12px;
}
.ki-lesson-card h3{
  font-size:14px;
  margin-bottom:4px;
}
.ki-lesson-card p{
  font-size:13px;
  color:var(--muted);
}
.ki-footer{
  margin-top:12px;
  font-size:12px;
  text-align:center;
  color:var(--muted);
}
.ki-link{
  color:var(--accent);
  text-decoration:none;
}
.ki-link:active{
  opacity:0.7;
}