@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root{
  --sky1:#e6f7ff;
  --sky2:#f4fbff;
  --accent:#60a5fa;
  --muted:#6b7280;
  --card:#ffffff;
  --danger:#fb7185;
  --income:#34d399;
  --shadow:rgba(15,23,42,0.08);
}

*{box-sizing:border-box;}
body{
  font-family:'Poppins',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial;
  background:linear-gradient(135deg,var(--sky1),var(--sky2));
  color:#0f172a;
  margin:0;
}
.app-bg{
  min-height:100vh;
  display:flex;
  flex-direction:row;
}

/* ---------- Sidebar ---------- */
.sidebar{
  width:260px;
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  padding:20px;
  background:rgba(255,255,255,0.9);
  backdrop-filter:blur(8px);
  border-right:1px solid rgba(0,0,0,0.05);
  overflow-y:auto;
  z-index:1050;
  display:flex;
  flex-direction:column;
  justify-content:flex-start;
}

.sidebar-top{
  margin-bottom:10px;
}

.sidebar .logo-mark{
  width:56px;
  height:56px;
  border-radius:12px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg,#fff,#f1fbff);
  color:var(--accent);
  font-weight:700;
  font-size:1.25rem;
  margin-bottom:12px;
}

.nav-link{
  color:#0f172a;
  padding:10px 14px;
  border-radius:8px;
  display:block;
  margin-bottom:6px;
  text-decoration:none;
  font-weight:500;
  transition:.2s;
}

.nav-link.active,
.nav-link:hover{
  background:rgba(96,165,250,0.12);
  color:var(--accent);
  text-decoration:none;
  font-weight:600;
}

/* ---------- Main Content ---------- */
main{
  flex-grow:1;
  margin-left:260px; /* sidebar width */
  padding:20px 30px;
  transition:.3s;
}

/* ---------- Cards ---------- */
.card{
  background:var(--card);
  border-radius:12px;
  box-shadow:0 6px 18px rgba(15,23,42,0.06);
  padding:15px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.card-hover:hover{
  transform:translateY(-8px);
  box-shadow:0 18px 40px var(--shadow);
}

/* ---------- Buttons ---------- */
.btn-sky{
  background:var(--accent);
  color:#fff;
  border:0;
  transition:.2s;
}

.btn-sky:hover{
  background:#3b82f6;
  color:#fff;
}

.btn-outline-primary{
  border-color:var(--accent);
  color:var(--accent);
}

.btn-outline-primary:hover{
  background:var(--accent);
  color:#fff;
}

/* ---------- Text Colors ---------- */
.text-success{color:var(--income)!important;}
.text-danger{color:var(--danger)!important;}

/* ---------- List Group ---------- */
.list-group-item{
  border:none;
  padding:.5rem 1rem;
  border-radius:8px;
  transition:.2s;
}

.list-group-item:hover{
  background:rgba(96,165,250,0.08);
}

/* ---------- Responsive (Mobile) ---------- */
@media (max-width:991px){
  .sidebar{
    display:none; /* hide fixed sidebar */
  }
  main{
    margin-left:0;
    margin-top:60px; /* space for mobile navbar */
    padding:15px;
  }
  .navbar{
    position:fixed;
    top:0;
    left:0;
    right:0;
    z-index:1060;
  }
}