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

html {
  overflow-x: hidden;
  width: 100%;
}

:root {
  /* Quidkey Brand Colors */
  --primary: #667eea;
  --primary-dark: #5568d3;
  --accent: #764ba2;
  --background: #f8f9fa;
  --surface: #ffffff;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --error: #ef4444;
  --success: #10b981;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto',
    'Helvetica Neue', Arial, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

/* Buttons */
button, .button {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
}

button:disabled, .button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

button.primary, .button.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

button.primary:hover:not(:disabled), .button.primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

button.primary:active:not(:disabled), .button.primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Forms */
input[type="text"],
input[type="url"],
input[type="email"],
select {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-primary);
  transition: all 0.2s ease;
  width: 100%;
}

input[type="text"]:focus,
input[type="url"]:focus,
input[type="email"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

input[type="text"]::placeholder,
input[type="url"]::placeholder,
input[type="email"]::placeholder {
  color: var(--text-secondary);
}

/* Error Messages */
.error-message {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
  display: none;
}

.error-message.visible {
  display: block;
}

/* Loading Spinner */
.spinner {
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  width: 16px;
  height: 16px;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  button, .button {
    padding: 0.75rem 1.25rem;
  }
}