:root {
  /* Color Palette - Light Mode */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f3f4f6;
  --color-text-primary: #111827;
  --color-text-secondary: #4b5563;
  --color-border: #e5e7eb;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-unsafe-text: #991b1b;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --font-family-base: "Inter", system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  /* Color Palette - Dark Mode */
  --color-bg-primary: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-text-primary: #f9fafb;
  --color-text-secondary: #9ca3af;
  --color-border: #334155;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-unsafe-text: #fecaca;
}

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

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

.login-container {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 320px;
  border: 1px solid var(--color-border);
}

h2 {
  margin-top: 0;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--color-text-primary);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

input {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  box-sizing: border-box;
  font-family: inherit;
  transition: border-color 0.2s ease;
}

input:focus {
  outline: none;
  border-color: var(--color-accent);
}

button {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  margin-top: var(--spacing-md);
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: var(--color-accent-hover);
}

.error {
  color: var(--color-unsafe-text);
  margin-top: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
  display: none;
}