:root {
    --primary-color: #2563eb;
    --background-color: #ffffff;
    --text-color: #1f2937;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    margin: 0 0.25rem;
    border-radius: 0.25rem;
    transition: background-color 0.3s;
}

.nav-menu a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 0.25rem;
    background-color: #fee2e2;
    color: #991b1b;
}

/* Modernize form inputs */
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-family: inherit;
  background-color: #f9fafb;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  border-color: #6366f1; /* Indigo tone */
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  outline: none;
  background-color: #fff;
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #111827;
}

.error {
  color: #dc2626;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: block;
}

/* Modern button style */
.btn-primary {
  padding: 0.75rem 1.5rem;
  background-color: #6366f1;
  color: white;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-primary:hover {
  background-color: #4f46e5;
}