:root {
  --bg: #0b0f14;
  --panel: #0e1621;
  --ink: #e6eef7;
  --muted: #9fb2c9;
  --line: #172434;
  --brand: #1365f4;
  --brand-2: #4cc9f0;
  --ok: #2a9d8f;
  --warn: #f4a261;
  --bad: #e76f51;
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; font-family: 'Inter', sans-serif; background: var(--bg); color: var(--ink); }

.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 100vh;
  overflow: hidden;
  transition: all .3s ease;
}

aside {
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}

.brand {
  padding: 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--line);
}

nav {
  flex: 1;
  overflow-y: auto;
}

.nav-btn {
  width: 100%;
  background: none;
  border: none;
  color: var(--muted);
  padding: 14px 18px;
  text-align: left;
  font-size: 15px;
  cursor: pointer;
  transition: background .2s;
  display: flex;
  justify-content: space-between;
}

.nav-btn:hover, .nav-btn.active {
  background: #12243a;
  color: var(--ink);
}

.side-foot {
  border-top: 1px solid var(--line);
  padding: 12px 18px;
  font-size: 12px;
  color: var(--muted);
}

main {
  overflow-y: auto;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.row, .grid-2, .grid-3 {
  display: grid;
  gap: 14px;
}

.row { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

button, select {
  background: #0a131e;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  transition: all .2s;
}

button.primary { background: var(--brand); border: none; color: #fff; font-weight: 600; }
button.primary:hover { filter: brightness(1.08); }
button.secondary { background: #172434; border: 1px solid #223349; }

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  aside {
    position: fixed;
    left: -280px;
    width: 280px;
    height: 100%;
    z-index: 10;
    transition: left 0.3s;
  }
  aside.open { left: 0; }
  main { padding-top: 70px; }
  .brand::after {
    content: "☰";
    float: right;
    cursor: pointer;
    font-size: 20px;
  }
}

/* Print */
@media print {
  .app { grid-template-columns: 1fr; }
  aside, .actions { display: none !important; }
  body { background: #fff; color: #000; }
  .card { border: 1px solid #ddd; background: #fff; }
  a { color: #004aad; }
  canvas { page-break-inside: avoid; }
}