html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f3f4f6;
  color: #111827;
  display: flex;
  flex-direction: column;
}

/* Topbar general */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: #111827;
  color: #f9fafb;
}

.topbar a {
  color: #93c5fd;
  text-decoration: none;
}

/* Botones generales */
.btn {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  background: #2563eb;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  text-decoration: none;
  text-align: center;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 13px;
}

.btn:hover {
  background: #1d4ed8;
}

/* Formularios base */
.form-group {
  margin-bottom: 12px;
}

label {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="date"] {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  font-size: 14px;
  box-sizing: border-box;
}

/* Alertas */
.alert {
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 10px;
  background: #e5e7eb;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
}

/* Login */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-box {
  background: #fff;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 380px;
}

.login-box h1 {
  margin-top: 0;
  margin-bottom: 16px;
  text-align: center;
}