:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #0f766e;
  --accent: #f59e0b;
  --danger: #b91c1c;
  --border: #d1d5db;
}

body[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #111827;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: #334155;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top left, var(--accent), var(--primary));
}

.login-card {
  width: min(92vw, 400px);
  background: var(--surface);
  border-radius: 14px;
  padding: 1.2rem;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.24);
}

form { display: grid; gap: 0.75rem; }
label { display: grid; gap: 0.35rem; font-size: 0.95rem; }
input, select, button {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.7rem;
  font: inherit;
}
button {
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}
button:hover { filter: brightness(1.06); }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand #logo {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: inline-grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(140deg, var(--primary), var(--accent));
  font-weight: 700;
}
.brand small { display: block; color: var(--muted); }

.layout {
  display: grid;
  grid-template-columns: 230px 1fr;
  min-height: calc(100vh - 65px);
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 0.8rem;
  display: grid;
  align-content: start;
  gap: 0.45rem;
  background: var(--surface);
}

.tab {
  text-align: left;
  background: transparent;
  color: var(--text);
}

.tab.active {
  background: color-mix(in oklab, var(--primary) 20%, transparent);
  border-color: var(--primary);
}

.content {
  padding: 1rem;
  display: grid;
  align-content: start;
  gap: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.8rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem;
}

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.list li {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--border);
}
.list li:last-child { border-bottom: 0; }
.list small { color: var(--muted); }

.inline-form {
  display: flex;
  gap: 0.6rem;
}
.inline-form input { flex: 1; }

.settings-form { max-width: 560px; }
.topbar-actions { display: flex; gap: 0.6rem; }
.error { color: var(--danger); }
.hint { color: var(--muted); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    grid-auto-flow: column;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .tab { white-space: nowrap; }
}