:root {
  /* Academy Color Palette */
  --color-primary: #1a365d;      /* Deep navy */
  --color-primary-light: #2b77d6; /* Academy blue */
  --color-secondary: #2d5a3d;    /* Forest green */
  --color-accent: #7a8f6a;       /* Muted sage */
  --color-text: #1a202c;         /* Rich charcoal */
  --color-text-light: #4a5568;   /* Warm gray */
  --color-text-muted: #718096;   /* Soft gray */
  --color-bg: #ffffff;           /* Pure white */
  --color-bg-alt: #f8fafc;       /* Light gray */
  --color-bg-muted: #f1f5f9;     /* Subtle blue-gray */
  --color-border: #e2e8f0;       /* Light border */
  --color-border-light: #f7fafc; /* Very light border */
  --color-hover: #2b77d6;        /* Hover blue */

  /* Professional Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Structured Spacing System */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-2xl: 4rem;     /* 64px */
  --space-3xl: 6rem;     /* 96px */

  /* Professional Layout */
  --max-width-content: 1200px;
  --max-width-narrow: 700px;
  --max-width-wide: 1400px;
  --header-height: 70px;
  --hero-height: 70vh;

  /* Subtle Shadows */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-soft: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: 0.01em;
}

/* Premium Typography Hierarchy */
h1 {
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.015em;
}

h3 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  letter-spacing: -0.01em;
}

p {
  margin-bottom: var(--space-lg);
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  max-width: 65ch;
}

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

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

/* Professional Layout System */
.section {
  width: 100%;
  padding: var(--space-3xl) 0;
  position: relative;
}

.section:nth-child(even) {
  background-color: var(--color-bg-alt);
}

.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Premium Header */
.header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 100;
  height: var(--header-height);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.logo {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  gap: var(--space-xl);
}

.nav-link {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  padding: var(--space-md) 0;
  transition: color 0.3s ease;
  position: relative;
  font-size: 1rem;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: var(--space-sm);
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--color-text);
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  margin: 3px 0;
  transition: 0.3s;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -5px);
}

/* Hero Section */
.hero {
  position: relative;
  height: var(--hero-height);
  min-height: 500px;
  background-image: url('img/photo1.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(26, 54, 93, 0.4);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width-narrow);
  color: white;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
  line-height: 1.1;
  color: white;
}

.hero p {
  font-size: 1.25rem;
  line-height: 1.6;
  margin-bottom: var(--space-xl);
  max-width: 500px;
  color: rgba(255, 255, 255, 0.9);
}

/* Content Sections */
.content-section {
  padding: var(--space-3xl) 0;
}

.content-section:nth-child(even) {
  background-color: var(--color-bg-alt);
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.content-grid.reverse {
  direction: rtl;
}

.content-grid.reverse > * {
  direction: ltr;
}

.content-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow-card);
}

.content-text h2 {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
  color: var(--color-primary);
}

.content-text p {
  margin-bottom: var(--space-lg);
  color: var(--color-text-light);
  max-width: 500px;
}

/* Programs Section */
.programs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.program-card {
  background: var(--color-bg);
  padding: var(--space-xl);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.program-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.program-price {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
  margin-bottom: var(--space-md);
}

.program-features {
  list-style: none;
  padding: 0;
}

.program-features li {
  padding: var(--space-xs) 0;
  position: relative;
  padding-left: var(--space-lg);
}

.program-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-secondary);
  font-weight: var(--font-weight-bold);
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.testimonial {
  background: var(--color-bg);
  padding: var(--space-xl);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  border-left: 4px solid var(--color-primary);
}

.testimonial blockquote {
  margin: 0;
  font-style: italic;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.testimonial-author {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.feature-icon {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-icon::before {
  content: '✓';
  font-weight: var(--font-weight-bold);
  font-size: 1.25rem;
}

.feature-item h3 {
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
  font-size: 1.125rem;
}

.feature-item p {
  margin: 0;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  text-align: center;
}

.cta-content {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.5rem;
  margin-bottom: var(--space-lg);
  color: white;
}

.cta-content p {
  font-size: 1.25rem;
  margin-bottom: var(--space-xl);
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Professional Buttons */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-primary);
  color: white;
  border: 2px solid var(--color-primary);
  border-radius: 4px;
  font-weight: var(--font-weight-medium);
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  text-align: center;
}

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

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

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

/* Editorial Image Selection */
.gallery {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin: var(--space-3xl) 0;
  max-width: var(--max-width-wide);
}

.gallery-item {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: 4px;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.5s ease;
}

.gallery-item:hover {
  transform: scale(1.02);
}

.gallery-item:first-child {
  aspect-ratio: 5/4;
}

/* Sophisticated Testimonials */
.reviews {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
  margin: var(--space-3xl) 0;
  max-width: var(--max-width-wide);
}

.review {
  background-color: var(--color-bg-alt);
  padding: var(--space-2xl);
  border-radius: 8px;
  border-left: 3px solid var(--color-primary);
  position: relative;
}

.review blockquote {
  margin: 0;
  font-style: normal;
  color: var(--color-text-light);
  line-height: 1.7;
  font-size: 1.1rem;
  position: relative;
}

.review-author {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-top: var(--space-lg);
  font-size: 1rem;
  letter-spacing: 0.5px;
}

/* Premium Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-2xl) 0;
}

.feature {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-xl);
  background-color: var(--color-bg-alt);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.feature-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-bottom: var(--space-sm);
}

.feature-icon::before {
  content: '✓';
  font-weight: var(--font-weight-bold);
  font-size: 1.5rem;
}

.feature h3 {
  margin-bottom: var(--space-sm);
}

.feature p {
  margin-bottom: 0;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Premium Pricing */
.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-2xl);
  margin: var(--space-3xl) 0;
}

.pricing-card {
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-2xl);
  text-align: center;
  box-shadow: var(--shadow-soft);
  transition: all 0.3s ease;
  position: relative;
}

.pricing-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-elegant);
  transform: translateY(-2px);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  background-color: var(--color-bg-alt);
}

.pricing-card.featured::before {
  content: 'Recommended';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: white;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.025em;
}

.pricing-title {
  font-size: 1.75rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: var(--font-weight-normal);
  color: var(--color-text-light);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--space-2xl);
  padding: 0;
}

.pricing-features li {
  padding: var(--space-sm) 0;
  position: relative;
  padding-left: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: var(--space-sm);
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  font-size: 1.1rem;
}

/* FAQ */
.faq {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: var(--space-lg) 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-primary);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 var(--space-md) var(--space-lg) 0;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* Contact */
.contact-info {
  display: grid;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.contact-item a {
  color: var(--color-primary);
  font-weight: 500;
}

.contact-form {
  max-width: 500px;
}

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

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-family);
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

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

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Institutional Footer */
.footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
}

.footer-content {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
}

.footer-section h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.footer-section:first-child h3 {
  font-size: 1.25rem;
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  color: var(--color-text-light);
  transition: color 0.2s ease;
  font-weight: var(--font-weight-normal);
  font-size: 0.875rem;
}

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-contact a {
  color: var(--color-text-light);
  transition: color 0.2s ease;
  font-weight: var(--font-weight-normal);
  font-size: 0.875rem;
}

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

.footer-bottom {
  text-align: center;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  max-width: var(--max-width-content);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --hero-height: 60vh;
    --space-3xl: 4rem;
    --space-2xl: 3rem;
    --space-xl: 2.5rem;
    --font-size-base: 16px;
  }

  .container,
  .container-narrow {
    padding: 0 var(--space-lg);
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.125rem;
  }

  .content-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .content-image {
    height: 250px;
  }

  .content-text h2 {
    font-size: 2rem;
  }

  .programs-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .cta-content h2 {
    font-size: 2rem;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    flex-direction: column;
    gap: 0;
    padding: var(--space-xl) var(--space-lg);
  }

  .nav.active {
    display: flex;
  }

  .nav-link {
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 1.1rem;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .btn {
    width: 100%;
    justify-content: center;
    padding: var(--space-lg) var(--space-xl);
  }
}

@media (max-width: 480px) {
  .container,
  .container-narrow,
  .header-content {
    padding: 0 var(--space-sm);
  }

  .block {
    padding: var(--space-2xl) 0;
  }

  .gallery {
    grid-template-columns: 1fr;
  }

  .gallery-item {
    height: 180px;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer {
    display: none;
  }

  body {
    background-color: white;
  }

  .block {
    page-break-inside: avoid;
  }
}