/*
 * RxAI Static Website - Main Stylesheet
 * Material Design 3 with Dual Theme Support
 * Theme 1: Dark (Purple/Teal) - Default
 * Theme 2: Black (Gold accents)
 * Author: Claude AI
 * Version: 1.0
 */

/* ============================================
   CSS VARIABLES - THEME SYSTEM
   ============================================ */

:root {
  /* Theme 1: Dark Purple/Teal (Default) */
  --primary: #BB86FC;
  --primary-variant: #9965F4;
  --secondary: #03DAC6;
  --secondary-variant: #018786;
  --background: #121212;
  --surface: #1E1E1E;
  --surface-variant: #2C2C2C;
  --error: #CF6679;
  --text-primary: #E1E1E1;
  --text-secondary: #B0B0B0;
  --text-disabled: #6E6E6E;
  --border: #3A3A3A;
  --shadow: rgba(0, 0, 0, 0.5);

  /* Theme-specific gradients */
  --gradient-primary: linear-gradient(135deg, #BB86FC 0%, #03DAC6 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(187, 134, 252, 0.1) 0%, rgba(3, 218, 198, 0.1) 100%);
}

[data-theme="black-gold"] {
  /* Theme 2: Black/Elegant Gold (Light Champagne Gold) */
  --primary: #F1E5B1;
  --primary-variant: #E6D89E;
  --secondary: #D4AF37;
  --secondary-variant: #C19A3C;
  --background: #000000;
  --surface: #0A0A0A;
  --surface-variant: #1A1A1A;
  --error: #FF6B6B;
  --text-primary: #F5F5F5;
  --text-secondary: #C0C0C0;
  --text-disabled: #707070;
  --border: #2A2A2A;
  --shadow: rgba(0, 0, 0, 0.7);

  /* Theme-specific gradients */
  --gradient-primary: linear-gradient(135deg, #F1E5B1 0%, #D4AF37 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(241, 229, 177, 0.08) 0%, rgba(212, 175, 55, 0.08) 100%);
}

/* ============================================
   GLOBAL RESET & BASE STYLES
   ============================================ */

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

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

body {
  font-family: 'Roboto', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-variant);
  text-decoration: underline;
}

a:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-large {
  padding: 6rem 0;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.flex {
  display: flex;
  gap: 1rem;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px var(--shadow);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: 1440px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  padding: 0.5rem 0;
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  text-decoration: none;
}

.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
}

/* Theme Switcher */
.theme-switcher {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface-variant);
  padding: 0.5rem;
  border-radius: 24px;
  border: 1px solid var(--border);
}

.theme-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.theme-btn:hover {
  color: var(--text-primary);
  background: var(--surface);
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem;
  background: var(--background);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-overlay);
  z-index: 1;
}

.hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  min-width: 140px;
  text-align: center;
}

.btn:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--background);
  box-shadow: 0 4px 12px rgba(187, 134, 252, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(187, 134, 252, 0.4);
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--background);
  text-decoration: none;
}

.btn-large {
  padding: 1.125rem 2.5rem;
  font-size: 1.125rem;
}

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

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s ease;
  height: 100%;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow);
  border-color: var(--primary);
}

.card-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   PRICING CARDS
   ============================================ */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  border-color: var(--primary);
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-variant) 100%);
}

.pricing-card.featured::before {
  content: 'POPULAR';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--background);
  padding: 0.25rem 1rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px var(--shadow);
}

.pricing-header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.pricing-name {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.pricing-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.pricing-price-currency {
  font-size: 1.5rem;
  font-weight: 400;
  margin-right: 0.25rem;
}

.pricing-period {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.75rem 0;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
}

.form-label-required::after {
  content: ' *';
  color: var(--error);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--surface-variant);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(187, 134, 252, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  display: none;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--error);
}

.form-input.error + .form-error,
.form-select.error + .form-error,
.form-textarea.error + .form-error {
  display: block;
}

/* ============================================
   BOOKING SYSTEM
   ============================================ */

.booking-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  max-width: 600px;
  margin: 0 auto;
}

.booking-header {
  text-align: center;
  margin-bottom: 2rem;
}

.booking-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto 1rem;
}

.booking-step {
  margin-bottom: 2rem;
}

.booking-step-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.booking-step-number {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: var(--background);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.booking-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.booking-option {
  background: var(--surface-variant);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.booking-option:hover {
  border-color: var(--primary);
  background: var(--surface);
}

.booking-option.selected {
  border-color: var(--primary);
  background: rgba(187, 134, 252, 0.1);
}

.booking-option-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.booking-option-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.booking-calendar {
  background: var(--surface-variant);
  border-radius: 8px;
  padding: 1rem;
}

.booking-confirm {
  background: var(--surface-variant);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.booking-confirm-item {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.booking-confirm-item:last-child {
  border-bottom: none;
}

.booking-confirm-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.booking-confirm-value {
  color: var(--text-primary);
  font-weight: 600;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section p,
.footer-section a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--primary);
  text-decoration: none;
}

.footer-social {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--surface-variant);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: var(--primary);
  color: var(--background);
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

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

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.fade-in-delay-1 {
  animation: fadeIn 0.6s ease-out 0.2s both;
}

.fade-in-delay-2 {
  animation: fadeIn 0.6s ease-out 0.4s both;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet: 600px - 1023px */
@media (max-width: 1023px) {
  .section {
    padding: 3rem 0;
  }

  .section-large {
    padding: 4rem 0;
  }

  .grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile: 0 - 599px */
@media (max-width: 599px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 1rem;
  }

  .section {
    padding: 2.5rem 0;
  }

  .section-large {
    padding: 3rem 0;
  }

  /* Mobile Navigation */
  .mobile-menu-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 1rem;
    display: none;
    flex-direction: column;
    box-shadow: 0 8px 16px var(--shadow);
  }

  .nav.active {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .nav-link {
    display: block;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .theme-switcher {
    width: 100%;
    margin-top: 1rem;
  }

  /* Hero */
  .hero {
    min-height: 500px;
    padding: 4rem 1rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  /* Grid */
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  /* Pricing */
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* Booking */
  .booking-container {
    padding: 1.5rem;
  }

  .booking-options {
    grid-template-columns: 1fr;
  }
}

/* Large Desktop: 1440px+ */
@media (min-width: 1440px) {
  .container {
    padding: 0 2rem;
  }

  .section-large {
    padding: 8rem 0;
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Skip to main content */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: var(--background);
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 10000;
}

.skip-to-main:focus {
  top: 0;
}

/* Keyboard focus indicators */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --border: #FFFFFF;
  }

  .card,
  .pricing-card {
    border-width: 2px;
  }
}

/* Print styles */
@media print {
  .header,
  .footer,
  .btn,
  .theme-switcher,
  .mobile-menu-toggle {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}