/* PersistentAI Brand Styles
 * Based on DSGN (Iris) specifications
 * Theming-ready: all colors use CSS variables
 */

:root {
  /* Brand Colors - Torii Theme */
  --color-terracotta: #C54B2A;
  --color-golden-pearl: #D4A84B;
  --color-charcoal: #2D2D2D;
  --color-charcoal-dark: #1a1a1a;
  --color-white: #FFFFFF;

  /* Semantic Colors */
  --color-primary: var(--color-terracotta);
  --color-accent: var(--color-golden-pearl);
  --color-background: var(--color-charcoal-dark);
  --color-surface: var(--color-charcoal);
  --color-text: var(--color-white);
  --color-text-muted: rgba(255, 255, 255, 0.6);

  /* Typography */
  --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 2rem;
  --font-size-2xl: 3rem;
  --font-weight-normal: 400;
  --font-weight-bold: 700;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Borders */
  --border-radius: 4px;
  --border-radius-lg: 8px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

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

h1 {
  font-size: var(--font-size-2xl);
}

h2 {
  font-size: var(--font-size-xl);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-center {
  text-align: center;
}

/* Logo */
.logo {
  max-width: 200px;
  height: auto;
  margin-bottom: var(--space-lg);
}

.logo-icon {
  max-width: 80px;
  height: auto;
  margin-bottom: var(--space-lg);
}

/* Wordmark */
.wordmark {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.wordmark .persistent {
  color: var(--color-terracotta);
}

.wordmark .ai {
  color: var(--color-terracotta);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-normal);
}

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

.btn-primary:hover,
.btn-primary:focus {
  background-color: #a33d22;
  outline: none;
}

.btn-primary:focus-visible {
  box-shadow: 0 0 0 3px rgba(197, 75, 42, 0.4);
}

/* Forms */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
  max-width: 400px;
}

.form-row {
  display: flex;
  gap: var(--space-sm);
}

.form-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  background-color: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Links */
a {
  color: var(--color-text-muted);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-text);
}

/* Teaser */
.teaser-text {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xl);
}

/* Footer */
.footer-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-lg);
}

/* Responsive */
@media (max-width: 640px) {
  :root {
    --font-size-2xl: 2rem;
    --font-size-xl: 1.5rem;
  }

  .form-row {
    flex-direction: column;
  }

  .logo {
    max-width: 150px;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  z-index: 100;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}