/* Clean Login Design */
:root {
  --primary: #4169e1;
  --primary-hover: #3557c5;
  --danger: #e53935;

  --bg-app: #ffffff;
  --bg-input: #fafafa;

  --text-primary: #111111;
  --text-secondary: #666666;
  --text-tertiary: #999999;

  --border-medium: #d4d4d4;

  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;

  --transition: 120ms ease-in-out;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f5f3f0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-xl);
}

.login-box {
  background: var(--bg-app);
  padding: 40px 32px;
  border-radius: 6px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
  border: 1px solid #e8e8e8;
}

h1 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: 14px;
}

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

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 13px;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-medium);
  border-radius: 4px;
  font-size: 14px;
  transition: all var(--transition);
  background: var(--bg-app);
  color: var(--text-primary);
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(65, 105, 225, 0.1);
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
  color: var(--text-tertiary);
}

.error-message {
  color: var(--danger);
  font-size: 13px;
  margin-bottom: var(--spacing-lg);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(229, 57, 53, 0.1);
  border-radius: 4px;
  border-left: 3px solid var(--danger);
  display: none;
}

.error-message:not(:empty) {
  display: block;
}

.btn-login {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--primary);
  color: white;
  border: 1px solid var(--primary);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-login:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

.btn-login:active {
  transform: translateY(1px);
}

.btn-login:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}