:root {
  --brand: #0d6efd;
  --bg: #f6f8fa;
  --card: #ffffff;
  --muted: #6b7280;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
}

body {
  font-family: Inter, system-ui, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: #111827;
}

/* --- Layout Containers --- */
.container {
  flex: 1; /* pushes footer down */
  padding: 16px;
}

.card {
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(0,0,0,.05);
  padding: 14px;
  margin-bottom: 14px;
}

.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

/* Header */
.topbar{
  background:var(--brand);
  color:#fff;
  padding:10px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
}
.topbar .brand{
  display:flex;
  align-items:center;
  gap:12px;
}
.topbar h1{font-size:20px;margin:0}
.topbar .username{
  font-weight:600;
  font-size:15px;
  color:#fbbf24; /* amber highlight */
}
#main-nav{
  display:flex;
  gap:14px;
  align-items:center;
}
#main-nav a{
  color:#fff;
  text-decoration:none;
  padding:6px 10px;
  border-radius:6px;
  font-weight:500;
  transition:background 0.2s;
}
#main-nav a:hover{
  background:rgba(255,255,255,0.15);
}

/* Dropdown */
.dropdown{
  position:relative;
}
.dropbtn{
  cursor:pointer;
  display:inline-block;
}
.dropdown-content{
  display:none;
  position:absolute;
  top:100%;
  left:0;
  background:#fff;
  min-width:160px;
  box-shadow:0 4px 8px rgba(0,0,0,0.15);
  border-radius:6px;
  overflow:hidden;
  z-index:1000;
}
.dropdown-content a{
  color:#111827 !important;
  padding:10px 14px;
  display:block;
  text-decoration:none;
  font-weight:500;
}
.dropdown-content a:hover{
  background:var(--brand-accent);
  color:#fff !important;
}
.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content{
  display:block;
}

/* Hamburger */
.menu-toggle{
  display:none;
  font-size:20px;
  background:none;
  border:none;
  color:#fff;
  cursor:pointer;
}
@media(max-width:768px){
  .menu-toggle{display:block;}
  #main-nav{
    display:none;
    flex-direction:column;
    gap:8px;
    width:100%;
    margin-top:10px;
  }
  #main-nav.show{display:flex;}
  .dropdown-content{position:relative;box-shadow:none;}
}

/* --- Tables --- */
.table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
}
.table th, .table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 14px;
}

/* --- Components --- */
input, select, button {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}
button {
  background: var(--brand);
  color: #fff;
  border: 0;
  cursor: pointer;
}
button:hover { opacity: .95; }
.btn-link {
  background: transparent;
  border: 0;
  color: var(--brand);
  padding: 0;
  cursor: pointer;
}
.badge {
  padding: 3px 8px;
  border-radius: 999px;
  background: #eef2ff;
  color: #3730a3;
  font-size: 12px;
}
.grid { display: grid; gap: 12px; }
.grid-4 { grid-template-columns: repeat(4,1fr); }
.grid-3 { grid-template-columns: repeat(3,1fr); }
@media(max-width:1000px){
  .grid-4{ grid-template-columns:1fr 1fr; }
  .grid-3{ grid-template-columns:1fr; }
}
.sub { color: var(--muted); font-size: 12px; }
.kpi { font-size: 22px; font-weight: 800; }

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.tab {
  padding: 6px 10px;
  border-radius: 999px;
  background: #eef1f6;
  cursor: pointer;
}
.tab.active {
  background: var(--brand);
  color: #fff;
}

/* --- Footer --- */
footer {
  color: var(--muted);
  text-align: center;
  padding: 20px 0;
  background: #fff;
  border-top: 1px solid var(--border);
  box-shadow: 0 -1px 3px rgba(0,0,0,0.05);
  font-size: 13px;
}
footer a {
  color: var(--brand);
  font-weight: 600;
  text-decoration: none;
}
footer a:hover {
  text-decoration: underline;
}

/* --- Responsive Navbar --- */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  #main-nav {
    display: none;
    flex-direction: column;
    background: var(--brand);
    position: absolute;
    top: 55px;
    right: 10px;
    width: 200px;
    padding: 10px;
    border-radius: 8px;
    z-index: 1000;
  }
  #main-nav.show {
    display: flex;
  }
  #main-nav a, #main-nav .dropbtn {
    display: block;
    padding: 10px;
  }
  .dropdown-content {
    position: static;
    box-shadow: none;
    background: #0056b3;
  }
  .dropdown-content a {
    color: #fff;
    padding: 8px 15px;
  }
  .dropdown-content a:hover {
    background: rgba(255,255,255,0.2);
  }
}