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

:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border-color: #334155;
  --success-color: #10b981;
  --error-color: #ef4444;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  gap: 3rem;
}

.content {
  text-align: center;
}

.logo {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.logo .accent {
  color: var(--primary-color);
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  max-width: 400px;
}

.auth-section {
  width: 100%;
  max-width: 400px;
}

.auth-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.auth-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-align: center;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

.btn-primary {
  width: 100%;
  padding: 0.875rem 1.5rem;
  background: var(--primary-color);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-loader {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.form-message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  text-align: center;
  display: none;
}

.form-message.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--success-color);
  color: var(--success-color);
  display: block;
}

.form-message.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error-color);
  color: var(--error-color);
  display: block;
}

footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

@media (max-width: 480px) {
  .logo {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .auth-card {
    padding: 1.5rem;
  }
}