:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --ok: #22c55e;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Login */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-card {
  width: 100%;
  max-width: 22rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}
.login-card h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.login-card p { margin: 0 0 1.5rem; color: var(--muted); font-size: 0.9rem; }

/* Forms */
label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.35rem; }
input, select, textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}
button, .btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn-secondary { background: var(--border); }
.btn-block { width: 100%; text-align: center; }
.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--danger);
  color: #fecaca;
  padding: 0.75rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

/* App layout */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 14rem;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1rem 0;
  flex-shrink: 0;
}
.sidebar-brand {
  padding: 0 1rem 1rem;
  font-weight: 700;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
}
.sidebar nav a {
  display: block;
  padding: 0.55rem 1rem;
  color: var(--muted);
  text-decoration: none;
}
.sidebar nav a:hover,
.sidebar nav a.active {
  color: var(--text);
  background: rgba(59, 130, 246, 0.15);
  text-decoration: none;
}
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.topbar-user { color: var(--muted); font-size: 0.9rem; }
.content { padding: 1.5rem; flex: 1; }
.content h1 { margin: 0 0 1rem; font-size: 1.35rem; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}
.card strong { display: block; font-size: 1.75rem; }
.card span { color: var(--muted); font-size: 0.85rem; }

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: 10px;
  overflow: hidden;
}
th, td {
  padding: 0.65rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-size: 0.8rem; font-weight: 600; }
.toolbar { display: flex; gap: 0.75rem; margin-bottom: 1rem; flex-wrap: wrap; }

.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.75rem;
  background: var(--border);
}
.badge-received { background: #1e3a5f; }
.badge-repair { background: #365314; }
.badge-done { background: #14532d; }

@media (max-width: 768px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
  .sidebar nav { display: flex; flex-wrap: wrap; gap: 0.25rem; padding: 0 0.5rem; }
  .sidebar nav a { padding: 0.4rem 0.6rem; font-size: 0.85rem; }
}