:root {
  --bg: #0b1220;
  --surface: #0f172a;
  --panel: #0f1b34;
  --card: #0f1f3a;
  --muted: #93a4c1;
  --text: #e6eefc;
  --primary: #2aa8ff;
  --primary-600: #1e90ff;
  --success: #16a34a;
  --danger: #ef4444;
  --warning: #f59e0b;
  --border: #1f2a44;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, #0b1530 100%);
  color: var(--text);
}

.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 64px 1fr;
  grid-template-areas:
    "sidebar header"
    "sidebar main";
  min-height: 100vh;
}
.app.no-sidebar {
  grid-template-columns: 1fr;
  grid-template-areas:
    "header"
    "main";
}

.sidebar {
  grid-area: sidebar;
  background: radial-gradient(1000px 500px at -100px -200px, rgba(42,168,255,0.15), transparent 60%), var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 12px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand {
  display: flex;
  align-items: center;
  font-weight: 800;
  letter-spacing: .4px;
  color: var(--text);
  font-size: 18px;
  padding: 8px 12px;
  border-radius: 8px;
}
.nav {
  margin-top: 16px;
}
.nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--muted);
  text-decoration: none;
  border-radius: 8px;
  margin: 4px 0;
}
.nav a:hover, .nav a.active {
  color: var(--text);
  background: linear-gradient(90deg, rgba(42,168,255,0.15), transparent 70%);
}

.header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.header .actions { display: flex; align-items: center; gap: 10px; }

.main {
  grid-area: main;
  padding: 20px;
}
.container { max-width: 1200px; margin: 0 auto; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 16px; }
.card {
  background: linear-gradient(180deg, rgba(42,168,255,0.05), rgba(15,31,58,0.6)), var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 10px 24px rgba(0,0,0,0.2);
}
.card h3 { margin: 0 0 8px 0; font-size: 14px; color: var(--muted); font-weight: 600; }
.stat { font-size: 26px; font-weight: 800; letter-spacing: .3px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(180deg, var(--primary), var(--primary-600));
  color: #001325;
  border: none; border-radius: 8px; padding: 10px 14px; cursor: pointer;
  font-weight: 700;
}
.btn.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn:disabled { opacity: .6; cursor: default; }

.table { width:100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { display:block; font-size:12px; color: var(--muted); margin-bottom:6px; }
input[type=text], input[type=email], input[type=number], input[type=password], textarea, select {
  width:100%; background: #0b1831; color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; outline: none;
}
input[type=file] {
  width:100%; background: #0b1831; color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; outline: none;
  cursor: pointer;
}
input[type=file]::file-selector-button {
  background: linear-gradient(180deg, var(--primary), var(--primary-600));
  color: #001325;
  border: none;
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  margin-right: 10px;
  font-weight: 600;
}
textarea { min-height: 120px; }

.flash { padding: 10px; border-radius: 8px; margin: 10px 0; border: 1px solid var(--border); }
.flash.success { background: rgba(22,163,74,0.15); color: #d1f7e0; }
.flash.error { background: rgba(239,68,68,0.15); color: #ffd0d0; }
.flash.warning { background: rgba(245,158,11,0.15); color: #ffeec4; }

.footer { padding: 16px 20px; color: var(--muted); border-top: 1px solid var(--border); margin-top: 20px; }

/* Login page layout */
.auth { display:flex; align-items:center; justify-content:center; min-height: calc(100vh - 64px); }
.auth .card { max-width: 420px; width: 100%; }