:root {
  --bg: #0f172a;
  --panel: #ffffff;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --error: #dc2626;
  --success: #16a34a;
  --sidebar: #1e293b;
  --sidebar-hover: #334155;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ---------- Telas de autenticação ---------- */
.auth-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.card {
  background: var(--panel);
  width: 100%;
  max-width: 420px;
  border-radius: 16px;
  padding: 36px 32px;
  box-shadow: 0 20px 50px rgba(0,0,0,.3);
}

.card h1 {
  font-size: 22px;
  margin-bottom: 4px;
  text-align: center;
}

.card .subtitle {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 24px;
}

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.field input,
.field select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color .15s;
  background: #fff;
}

.field input:focus,
.field select:focus { border-color: var(--primary); }

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}

.btn:hover { background: var(--primary-hover); }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.links {
  display: flex;
  justify-content: space-between;
  margin-top: 18px;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 8px;
}

.links a {
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
}
.links a:hover { text-decoration: underline; }

.msg {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
}
.msg.error { background: #fef2f2; color: var(--error); display: block; }
.msg.success { background: #f0fdf4; color: var(--success); display: block; }

/* ---------- App (após login) ---------- */
.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  background: var(--sidebar);
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  padding: 20px 0;
}

.sidebar .brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  padding: 0 24px 20px;
  border-bottom: 1px solid #334155;
}

.sidebar nav {
  flex: 1;
  margin-top: 12px;
}

.sidebar nav a {
  display: block;
  padding: 12px 24px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
  transition: background .12s;
}
.sidebar nav a:hover { background: var(--sidebar-hover); color: #fff; }

.user-box {
  padding: 16px 24px;
  border-top: 1px solid #334155;
  font-size: 13px;
}
.user-box .u-name { color: #fff; font-weight: 600; }
.user-box .u-nucleo { color: #94a3b8; margin-top: 2px; }
.user-box .u-role {
  display: inline-block;
  margin-top: 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px;
  background: var(--primary);
  color: #fff;
  padding: 2px 8px;
  border-radius: 6px;
}

.main {
  flex: 1;
  background: #f8fafc;
  padding: 40px;
}
.main h2 { color: var(--text); margin-bottom: 8px; }
.main p { color: var(--muted); }

@media (max-width: 640px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; }
}