:root {
  --bg: #0f1115;
  --muted: #141925;
  --border: #222736;
  --text: #e6e6e6;
  --subtext: #aab1c3;
  --accent: #4f8cff;
  --accent-2: #2f3a55;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--muted);
  border-right: 1px solid var(--border);
  padding: 18px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 14px; padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
}
.dot {
  width: 10px; height: 10px; border-radius: 999px; background: var(--accent);
}
.brand-text small { color: var(--subtext); display: block; margin-top: 2px; }

.menu { display: grid; gap: 6px; margin-top: 10px; }
.menu a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--subtext);
  text-decoration: none;
  transition: .12s ease;
}
.menu a:hover { background: #1a2030; color: #fff; }
.menu a.active { background: var(--accent-2); color: #fff; }

/* Main */
.content {
  min-width: 0;
  padding: 20px 22px;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 0 16px 0;
}
.topbar h1 { margin: 0; font-size: 20px; }

/* Cards & grid */
.card {
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.card.link { text-decoration: none; color: inherit; transition: transform .08s ease, border-color .08s ease; }
.card.link:hover { transform: translateY(-2px); border-color: var(--accent-2); }
.card h2 { margin: 0 0 8px 0; font-size: 18px; }
.card p { margin: 0; color: var(--subtext); }

/* Responsive: collapse sidebar on small screens */
@media (max-width: 860px) {
  body { grid-template-columns: 1fr; }
  .sidebar {
    position: relative; height: auto;
    border-right: none; border-bottom: 1px solid var(--border);
  }
}