/* ============================================
   Carlton Select™ Styles
   Theme-Aware, Token-Driven, Mobile-First, Accessible
   ============================================ */

/* ============================================
   CSS Custom Properties (Design Tokens)
   Now theme-aware - adapts to Flow Studio's 8-theme system
   Source: design/tokens.carlton-select.json + shared/themes.js
   ============================================ */
:root {
  /* Theme-Aware Colors - Map to shared theme system */
  /* These will be overridden by theme switcher */
  --color-navy-900: var(--color-primary-dark, #0f1f3d);
  --color-navy-800: var(--color-primary, #1a365d);
  --color-navy-700: var(--color-primary-light, #2c4875);
  --color-navy-600: var(--color-primary-light, #3d5a8c);

  /* Colors - Accent (theme-aware) */
  --color-gold-600: var(--color-accent, #b8860b);
  --color-gold-500: var(--color-accent, #d4af37);
  --color-gold-400: var(--color-accent-light, #e4c764);
  --color-gold-300: var(--color-accent-light, #f0db93);

  /* Colors - Neutral (theme-aware) */
  --color-champagne: var(--color-background-alt, #f7f3e9);
  --color-white: var(--color-background, #ffffff);
  --color-off-white: var(--color-background, #fafaf9);
  --color-gray-200: #edf2f7;
  --color-gray-300: var(--color-border, #e2e8f0);
  --color-gray-400: var(--color-border, #cbd5e0);
  --color-gray-500: #a0aec0;
  --color-gray-700: var(--color-text-light, #4a5568);
  --color-gray-800: var(--color-text, #2d3748);
  --color-gray-900: var(--color-text, #1a202c);

  /* Colors - Semantic */
  --color-success: #2f855a;
  --color-error: #c53030;

  /* Typography - Families (theme-aware with Carlton fallbacks) */
  /* Themes can override, but Carlton's elegant serif/sans defaults remain */
  --font-heading-base: 'Cormorant Garamond', serif;
  --font-body-base: 'Montserrat', 'Inter', system-ui, -apple-system, sans-serif;

  /* Typography - Scale */
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-md: 18px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 30px;
  --font-size-3xl: 36px;
  --font-size-4xl: 48px;
  --font-size-5xl: 60px;

  /* Typography - Weights */
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Typography - Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Typography - Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;

  /* Spacing */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-8: 64px;
  --space-10: 80px;
  --space-12: 96px;
  --space-16: 128px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-focus: 0 0 0 3px rgba(212, 175, 55, 0.4);

  /* Layout */
  --container-max-width: 1200px;
  --container-padding: 24px;
  --section-padding-mobile: 48px;
  --section-padding-desktop: 96px;

  /* Motion */
  --duration-fast: 150ms;
  --duration-medium: 250ms;
  --easing-default: ease-in-out;
  --easing-sharp: cubic-bezier(0.4, 0.0, 0.6, 1);
}

/* ============================================
   CSS Reset & Base Styles
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body, var(--font-body-base));
  font-size: var(--font-size-base);
  font-weight: var(--font-body-weight, var(--font-weight-regular));
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  transition: background-color var(--motion-duration, 0.25s) var(--motion-easing, ease);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading, var(--font-heading-base));
  font-weight: var(--font-heading-weight, var(--font-weight-bold));
  line-height: var(--line-height-snug);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-navy-800);
  transition: color var(--motion-duration, 0.25s) var(--motion-easing, ease);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--space-3);
}

a {
  color: var(--color-gold-500);
  text-decoration: underline;
  transition: color var(--duration-fast) var(--easing-default);
}

a:hover {
  color: var(--color-gold-400);
}

a:focus {
  outline: 2px solid var(--color-gold-500);
  outline-offset: 2px;
}

/* ============================================
   Layout Components
   ============================================ */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--section-padding-mobile) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--section-padding-desktop) 0;
  }
}

.section--white {
  background-color: var(--color-white);
  transition: background-color var(--motion-duration, 0.25s) var(--motion-easing, ease);
}

.section--champagne {
  background-color: var(--color-champagne);
  transition: background-color var(--motion-duration, 0.25s) var(--motion-easing, ease);
}

.section--navy {
  background-color: var(--color-navy-800);
  color: var(--color-white);
  transition: background-color var(--motion-duration, 0.25s) var(--motion-easing, ease),
              color var(--motion-duration, 0.25s) var(--motion-easing, ease);
}

.section__headline {
  font-size: var(--font-size-3xl);
  text-align: center;
  margin-bottom: var(--space-8);
  color: var(--color-navy-800);
}

.section__headline--light {
  color: var(--color-white);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-champagne) 0%, var(--color-off-white) 100%);
  padding: var(--space-12) 0;
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    padding: var(--space-16) 0;
  }
}

.hero__content {
  max-width: 800px;
  margin: 0 auto;
}

.hero__logo {
  margin-bottom: var(--space-6);
}

.logo-text {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-navy-800);
  letter-spacing: var(--letter-spacing-tight);
}

@media (min-width: 768px) {
  .logo-text {
    font-size: var(--font-size-5xl);
  }
}

.trademark {
  font-size: 0.5em;
  vertical-align: super;
  color: var(--color-gold-500);
}

.hero__headline {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2);
  color: var(--color-navy-800);
}

@media (min-width: 768px) {
  .hero__headline {
    font-size: var(--font-size-4xl);
  }
}

.hero__subtext {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .hero__subtext {
    font-size: var(--font-size-xl);
  }
}

.hero__value-prop {
  font-size: var(--font-size-md);
  color: var(--color-gray-800);
  margin-bottom: var(--space-8);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .hero__value-prop {
    font-size: var(--font-size-lg);
  }
}

.hero__cta {
  margin-top: var(--space-8);
}

.hero__cta-note {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  margin-top: var(--space-2);
  margin-bottom: 0;
}

/* ============================================
   Buttons
   ============================================ */
.button {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-4);
  min-height: 48px;
  line-height: 1.5;
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--easing-sharp);
}

.button--primary {
  background-color: var(--color-gold-500);
  color: var(--color-navy-800);
}

.button--primary:hover {
  background-color: var(--color-gold-400);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.button--primary:focus {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.button--submit {
  background-color: var(--color-gold-500);
  color: var(--color-navy-800);
  width: 100%;
  margin-top: var(--space-3);
}

.button--submit:hover {
  background-color: var(--color-gold-400);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.button--submit:focus {
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* ============================================
   Benefits Grid (Section 2)
   ============================================ */
.benefits-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .benefits-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.benefit-card {
  text-align: center;
  padding: var(--space-4);
}

.benefit-card__icon {
  color: var(--color-navy-800);
  margin-bottom: var(--space-3);
  display: flex;
  justify-content: center;
  align-items: center;
}

.benefit-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-navy-800);
}

.benefit-card__description {
  font-size: var(--font-size-base);
  color: var(--color-gray-700);
  margin-bottom: 0;
}

/* ============================================
   Membership Advantages (Section 3)
   ============================================ */
.advantages-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (min-width: 768px) {
  .advantages-layout {
    grid-template-columns: 1fr 1fr;
  }
}

.trust-signals {
  list-style: none;
  padding: 0;
  margin: 0;
}

.trust-signals__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--font-size-md);
  color: var(--color-gray-800);
  margin-bottom: var(--space-3);
}

.trust-signals__item:last-child {
  margin-bottom: 0;
}

.trust-signals__icon {
  flex-shrink: 0;
  color: var(--color-gold-500);
  margin-top: 2px;
}

.statement {
  background-color: rgba(255, 255, 255, 0.7);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-gold-500);
}

.statement__text {
  font-size: var(--font-size-md);
  font-style: italic;
  color: var(--color-gray-800);
  margin-bottom: 0;
}

/* ============================================
   CTA Section (Section 4)
   ============================================ */
.cta-section {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
}

.cta-section__subtext {
  font-size: var(--font-size-md);
  color: var(--color-gray-300);
  margin-bottom: var(--space-6);
}

/* ============================================
   Forms
   ============================================ */
.invitation-form {
  text-align: left;
  margin-top: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--space-1);
}

.required {
  color: var(--color-error);
}

.optional {
  font-weight: var(--font-weight-regular);
  color: var(--color-gray-400);
}

.form-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  border: 2px solid var(--color-gray-400);
  border-radius: var(--radius-sm);
  padding: 14px var(--space-2);
  min-height: 48px;
  transition: all var(--duration-fast) var(--easing-default);
}

.form-input::placeholder {
  color: var(--color-gray-500);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-gold-500);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.form-input:invalid:not(:placeholder-shown) {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(197, 48, 48, 0.15);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%234a5568' d='M4.427 6.427l3.396 3.396a.25.25 0 00.354 0l3.396-3.396A.25.25 0 0011.396 6H4.604a.25.25 0 00-.177.427z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: var(--space-5);
}

.form-note {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  text-align: center;
  margin-top: var(--space-2);
  margin-bottom: 0;
}

.privacy-note {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  text-align: center;
  margin-top: var(--space-6);
  margin-bottom: 0;
}

.privacy-link {
  color: var(--color-gold-400);
  text-decoration: underline;
}

.privacy-link:hover {
  color: var(--color-gold-300);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--color-gray-900);
  padding: var(--space-4) 0;
  text-align: center;
}

.footer__text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  margin-bottom: 0;
}

.footer__link {
  color: var(--color-gray-400);
  text-decoration: underline;
}

.footer__link:hover {
  color: var(--color-white);
}

/* ============================================
   Accessibility Enhancements
   ============================================ */

/* Skip to main content link (for screen readers) */
.skip-to-main {
  position: absolute;
  left: -9999px;
  z-index: 999;
}

.skip-to-main:focus {
  left: 0;
  top: 0;
  background-color: var(--color-gold-500);
  color: var(--color-navy-800);
  padding: var(--space-2) var(--space-3);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
}

/* Focus visible for all interactive elements */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-gold-500);
  outline-offset: 2px;
}

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

/* High contrast mode adjustments */
@media (prefers-contrast: high) {
  .button--primary {
    border: 2px solid var(--color-navy-800);
  }

  .form-input {
    border-width: 3px;
  }
}

/* ============================================
   Responsive Typography Adjustments
   ============================================ */
@media (min-width: 768px) {
  h1 {
    font-size: var(--font-size-5xl);
  }

  h2 {
    font-size: var(--font-size-4xl);
  }

  h3 {
    font-size: var(--font-size-2xl);
  }

  .section__headline {
    font-size: var(--font-size-4xl);
  }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  body {
    background: white;
    color: black;
  }

  .button,
  .form,
  .footer {
    display: none;
  }

  a {
    text-decoration: underline;
    color: black;
  }

  a[href^="http"]:after {
    content: " (" attr(href) ")";
  }
}