/* ==========================================================================
   AC Personal Training - Modern CSS Architecture
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
  /* Colors - Modern Blue/Purple Theme */
  --primary-600: #2563eb;
  --primary-500: #3b82f6;
  --primary-400: #60a5fa;
  --accent-600: #7c3aed;
  --accent-500: #8b5cf6;
  --accent-400: #a78bfa;
  --success-600: #059669;
  --success-500: #10b981;

  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-normal: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 5rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;

  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-header: 1000;
  --z-modal: 2000;
  --z-toast: 3000;
}

/* ==========================================================================
   2. Modern CSS Reset
   ========================================================================== */

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

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: #fff;
  overflow-x: hidden;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

a {
  text-decoration: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

/* ==========================================================================
   3. Typography System
   ========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--gray-900);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: var(--font-weight-extrabold);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

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

p {
  margin-bottom: 1rem;
}

/* ==========================================================================
   4. Layout Components
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary-600);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: var(--z-toast);
  border-radius: 0 0 var(--radius-sm) 0;
}

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

/* ==========================================================================
   5. Header & Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.logo a {
  display: flex;
  flex-direction: column;
  transition: opacity var(--transition-fast);
}

.logo a:hover {
  opacity: 0.8;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
}

.logo-tagline {
  font-size: 0.75rem;
  color: var(--gray-600);
  font-weight: var(--font-weight-normal);
}

.nav-links {
  display: none;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  position: relative;
  color: var(--gray-700);
  font-weight: var(--font-weight-semibold);
  transition: color var(--transition-fast);
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-600);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--primary-600);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links .nav-cta {
  background: var(--primary-600);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-links .nav-cta::after {
  display: none;
}

.nav-links .nav-cta:hover {
  background: var(--primary-500);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0.5rem;
  z-index: calc(var(--z-header) + 1);
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--gray-900);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Menu */
@media (max-width: 767px) {
  .nav-links {
    display: flex;
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: white;
    flex-direction: column;
    align-items: stretch;
    padding: 5rem 2rem 2rem;
    box-shadow: var(--shadow-2xl);
    transition: right var(--transition-base);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-200);
  }

  .nav-links .nav-cta {
    margin-top: 1rem;
    text-align: center;
  }
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      135deg,
      rgba(37, 99, 235, 0.85) 0%,
      rgba(124, 58, 237, 0.75) 100%
    ),
    url('/images/banner.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -1;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  color: white;
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  color: white;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
  font-weight: var(--font-weight-semibold);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.trust-indicators {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  font-size: 0.9rem;
  opacity: 0.95;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.trust-item .icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: white;
  opacity: 0.8;
  animation: bounce 2s infinite;
}

.scroll-text {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
}

.scroll-icon {
  width: 24px;
  height: 24px;
}

@keyframes bounce {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

/* ==========================================================================
   7. Button Styles
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  min-height: 44px;
  text-align: center;
}

.btn-primary {
  background: white;
  color: var(--primary-600);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background: var(--gray-50);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 2px solid white;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* ==========================================================================
   8. Services Section
   ========================================================================== */

.services {
  padding: var(--spacing-3xl) 0;
  background: var(--gray-50);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  text-align: center;
  color: var(--gray-600);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-2xl);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.service-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out forwards;
}

.service-card:nth-child(1) {
  animation-delay: 0.1s;
}

.service-card:nth-child(2) {
  animation-delay: 0.2s;
}

.service-card:nth-child(3) {
  animation-delay: 0.3s;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-500) 100%);
  color: white;
}

.service-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--gray-900);
}

.service-description {
  color: var(--gray-600);
  margin-bottom: var(--spacing-md);
}

.service-benefits {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.service-benefits li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  color: var(--gray-700);
  font-size: 0.9375rem;
}

.check-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--success-600);
  margin-top: 2px;
}

/* ==========================================================================
   9. About Section
   ========================================================================== */

.about {
  padding: var(--spacing-3xl) 0;
  background: white;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.about-content h2 {
  margin-bottom: var(--spacing-md);
}

.about-intro {
  font-size: 1.125rem;
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
}

.about-highlight {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-600);
  margin: var(--spacing-lg) 0;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.about-highlight p {
  margin: 0;
  color: var(--gray-900);
  font-size: 1.125rem;
}

.about-content .btn {
  margin-top: var(--spacing-md);
  background: var(--primary-600);
  color: white;
}

.about-content .btn:hover {
  background: var(--primary-500);
}

.about-credentials {
  display: flex;
  justify-content: center;
}

.credentials-badge {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--accent-600) 100%);
  color: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
}

.credentials-badge h3 {
  color: white;
  margin-bottom: var(--spacing-xs);
  font-size: 1.75rem;
}

.credentials-title {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: var(--spacing-lg);
}

.credentials-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.credentials-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1rem;
}

.credentials-list .check-icon {
  color: white;
  opacity: 0.9;
}

/* ==========================================================================
   10. Testimonials Section
   ========================================================================== */

.testimonials {
  padding: var(--spacing-3xl) 0;
  background: var(--gray-50);
}

.testimonials-scroll {
  display: flex;
  gap: var(--spacing-xl);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding-bottom: var(--spacing-md);
  -webkit-overflow-scrolling: touch;
}

.testimonials-scroll::-webkit-scrollbar {
  height: 8px;
}

.testimonials-scroll::-webkit-scrollbar-track {
  background: var(--gray-200);
  border-radius: 4px;
}

.testimonials-scroll::-webkit-scrollbar-thumb {
  background: var(--primary-500);
  border-radius: 4px;
}

.testimonial-card {
  flex: 0 0 350px;
  scroll-snap-align: start;
  background: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.testimonial-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.testimonial-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.testimonial-content {
  padding: var(--spacing-lg);
}

.testimonial-rating {
  display: flex;
  gap: 0.25rem;
  margin-bottom: var(--spacing-md);
}

.star-icon {
  width: 20px;
  height: 20px;
  color: #fbbf24;
}

.testimonial-quote {
  font-style: italic;
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.testimonial-author {
  border-top: 1px solid var(--gray-200);
  padding-top: var(--spacing-md);
}

.author-name {
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin-bottom: 0.25rem;
}

.author-program {
  font-size: 0.875rem;
  color: var(--gray-600);
  margin: 0;
}

/* ==========================================================================
   11. CTA Section
   ========================================================================== */

.cta {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

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

.cta-content h2 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.cta-description {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.95;
}

.cta-benefits {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.cta-benefits li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1rem;
}

.cta-benefits .check-icon {
  color: white;
}

.contact-form {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-2xl);
}

.form-wrapper {
  position: relative;
  height: 80vh;
  min-height: 500px;
  overflow: auto;
  border-radius: var(--radius-md);
}

.form-wrapper iframe {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ==========================================================================
   12. Footer
   ========================================================================== */

.site-footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer-about h3,
.footer-contact h3,
.footer-social h3 {
  color: white;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.footer-description {
  color: var(--gray-400);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.footer-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--primary-400);
  margin-top: 2px;
}

.contact-list a {
  color: var(--gray-300);
  transition: color var(--transition-fast);
}

.contact-list a:hover {
  color: var(--primary-400);
}

.footer-location {
  margin-top: var(--spacing-md);
  font-size: 0.9375rem;
}

.footer-location a {
  color: var(--primary-400);
  transition: color var(--transition-fast);
}

.footer-location a:hover {
  color: var(--primary-300);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--gray-800);
  transition: all var(--transition-fast);
}

.social-link svg {
  width: 24px;
  height: 24px;
  color: var(--gray-300);
  transition: color var(--transition-fast);
}

.social-link:hover {
  background: var(--primary-600);
  transform: translateY(-4px);
}

.social-link:hover svg {
  color: white;
}

.footer-map {
  margin: var(--spacing-xl) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-bottom p {
  margin-bottom: var(--spacing-sm);
  color: var(--gray-400);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
}

.footer-links li {
  color: var(--gray-500);
}

.footer-links a {
  color: var(--primary-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-300);
}

/* ==========================================================================
   13. Animations
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
}

/* ==========================================================================
   14. Utility Classes
   ========================================================================== */

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* ==========================================================================
   15. Accessibility
   ========================================================================== */

/* Focus styles */
:focus-visible {
  outline: 3px solid var(--primary-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;
  }

  html {
    scroll-behavior: auto;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --primary-600: #0000ff;
    --gray-600: #000000;
  }
}

/* ==========================================================================
   16. Print Styles
   ========================================================================== */

@media print {
  .site-header,
  .hero-cta,
  .scroll-indicator,
  .menu-toggle,
  .cta,
  .site-footer .social-links {
    display: none;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  .hero-background {
    display: none;
  }
}