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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background-color: #ffffff;
  overflow-x: hidden;
}

/* Monochrome Sophisticated Design Style - Black/White/Gray Palette */
:root {
  --color-primary: #000000;
  --color-secondary: #333333;
  --color-accent: #666666;
  --color-light: #f5f5f5;
  --color-white: #ffffff;
  --color-border: #e0e0e0;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-xxl: 64px;
  --transition: all 0.3s ease;
}

/* Typography - Elegant & Sophisticated */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.5px;
}

h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1px;
}

h2 {
  font-size: 32px;
  font-weight: 700;
}

h3 {
  font-size: 24px;
  font-weight: 600;
}

h4 {
  font-size: 18px;
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-secondary);
  font-size: 16px;
}

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

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

ul {
  list-style: none;
}

ul li {
  padding-left: var(--spacing-md);
  position: relative;
  margin-bottom: var(--spacing-sm);
  color: var(--color-secondary);
}

ul li:before {
  content: '▪';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

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

/* Header - Sophisticated & Clean */
header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

header img {
  height: 50px;
  width: auto;
  transition: var(--transition);
}

header img:hover {
  opacity: 0.8;
}

header nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  flex-wrap: wrap;
}

header nav a {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--spacing-xs) 0;
  position: relative;
  transition: var(--transition);
}

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

header nav a:hover:after {
  width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 2000;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 0;
  font-size: 24px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.mobile-menu-toggle:hover {
  background: var(--color-secondary);
  transform: scale(1.05);
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background: var(--color-white);
  z-index: 1999;
  transition: right 0.4s ease;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  padding: var(--spacing-xxl) var(--spacing-lg);
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: transparent;
  border: none;
  font-size: 32px;
  cursor: pointer;
  color: var(--color-primary);
  transition: var(--transition);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-close:hover {
  color: var(--color-accent);
  transform: rotate(90deg);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.mobile-nav a {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 18px;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mobile-nav a:hover {
  color: var(--color-accent);
  padding-left: var(--spacing-sm);
}

/* Hero Section - Dramatic & Elegant */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  padding: var(--spacing-xxl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(255, 255, 255, 0.03) 10px,
    rgba(255, 255, 255, 0.03) 20px
  );
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.95);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.8;
}

.hero .trust-indicators {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  margin-top: var(--spacing-lg);
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* CTA Buttons - Bold & Clear */
.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 700;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  border-radius: 0;
}

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

.btn-primary:hover {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

section .btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  margin-top: var(--spacing-md);
}

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

/* Stats Section - Clean Grid */
.stats {
  background: var(--color-light);
  padding: var(--spacing-xxl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats .container {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-md);
  flex: 1 1 200px;
  min-width: 200px;
}

.stat-item h3 {
  font-size: 48px;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  font-weight: 800;
  letter-spacing: -1px;
}

.stat-item p {
  font-size: 14px;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

/* Sections - Generous Spacing */
section {
  padding: var(--spacing-xxl) 0;
  margin-bottom: var(--spacing-md);
}

section h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: 32px;
  position: relative;
  padding-bottom: var(--spacing-md);
}

section h2:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--color-primary);
}

section > .container > p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  font-size: 18px;
  line-height: 1.8;
}

/* Service Grid - Flexbox Layout */
.service-grid,
.stats-grid,
.resource-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  justify-content: space-between;
  margin-top: var(--spacing-xl);
}

.service-card,
.resource-card,
.olympiad-card {
  flex: 1 1 calc(33.333% - var(--spacing-lg));
  min-width: 280px;
  background: var(--color-white);
  border: 2px solid var(--color-border);
  padding: var(--spacing-lg);
  transition: var(--transition);
  position: relative;
  margin-bottom: var(--spacing-md);
}

.service-card:hover,
.resource-card:hover,
.olympiad-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.service-card h3,
.resource-card h3,
.olympiad-card h3 {
  margin-bottom: var(--spacing-md);
  font-size: 20px;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
}

.service-card p,
.resource-card p,
.olympiad-card p {
  color: var(--color-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.price {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-family: 'Montserrat', sans-serif;
}

/* Testimonials - Elegant Cards */
.testimonials {
  background: var(--color-light);
  padding: var(--spacing-xxl) 0;
}

.testimonial-card {
  background: var(--color-white);
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: flex-start;
  position: relative;
}

.testimonial-card:before {
  content: '"';
  font-size: 72px;
  color: var(--color-border);
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-md);
  font-family: Georgia, serif;
  line-height: 1;
}

.testimonial-card p {
  color: var(--color-primary);
  font-size: 16px;
  line-height: 1.8;
  font-style: italic;
  position: relative;
  z-index: 1;
  padding-left: var(--spacing-lg);
}

.testimonial-card .author {
  font-weight: 700;
  color: var(--color-secondary);
  font-style: normal;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-lg);
}

/* Content Wrapper - Text Sections */
.content-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  justify-content: space-between;
  margin-top: var(--spacing-xl);
}

.text-section {
  flex: 1 1 calc(50% - var(--spacing-lg));
  min-width: 280px;
  padding: var(--spacing-lg);
  background: var(--color-light);
  border-left: 4px solid var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.text-section h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.text-section p,
.text-section ul {
  color: var(--color-secondary);
}

/* Contact Section */
.contact-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  justify-content: space-between;
  margin-top: var(--spacing-xl);
}

.contact-card {
  flex: 1 1 calc(50% - var(--spacing-lg));
  min-width: 280px;
  background: var(--color-light);
  padding: var(--spacing-lg);
  border: 2px solid var(--color-border);
  text-align: center;
  transition: var(--transition);
  margin-bottom: var(--spacing-md);
}

.contact-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: 600px;
  margin: 0 auto;
}

.contact-info p {
  padding: var(--spacing-md);
  background: var(--color-light);
  border-left: 3px solid var(--color-primary);
}

/* FAQ Section */
.faq {
  max-width: 800px;
  margin: 0 auto;
}

.faq h3 {
  color: var(--color-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: 18px;
}

.faq p {
  color: var(--color-secondary);
  padding-left: var(--spacing-md);
  border-left: 3px solid var(--color-border);
}

/* CTA Banner - Dramatic */
.cta-banner {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  color: var(--color-white);
  padding: var(--spacing-xxl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 20px,
    rgba(255, 255, 255, 0.03) 20px,
    rgba(255, 255, 255, 0.03) 40px
  );
  pointer-events: none;
}

.cta-banner .container {
  position: relative;
  z-index: 1;
}

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

.cta-banner p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 18px;
  margin-bottom: var(--spacing-lg);
}

/* Footer - Sophisticated Grid */
footer {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
  border-top: 4px solid var(--color-secondary);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
}

.footer-section {
  flex: 1 1 200px;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-section img {
  height: 50px;
  width: auto;
  margin-bottom: var(--spacing-sm);
  filter: brightness(0) invert(1);
}

.footer-section h4 {
  color: var(--color-white);
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-secondary);
  padding-bottom: var(--spacing-sm);
}

.footer-section p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  line-height: 1.6;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  transition: var(--transition);
  display: block;
  padding: var(--spacing-xs) 0;
}

.footer-section a:hover {
  color: var(--color-white);
  padding-left: var(--spacing-sm);
}

.copyright {
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* Cookie Consent Banner */
#cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-top: 3px solid var(--color-primary);
  padding: var(--spacing-md);
  z-index: 9999;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

#cookie-consent.show {
  transform: translateY(0);
}

#cookie-consent .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

#cookie-consent p {
  flex: 1 1 300px;
  margin: 0;
  color: var(--color-secondary);
  font-size: 14px;
}

.cookie-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  align-items: center;
}

.cookie-buttons button {
  padding: var(--spacing-xs) var(--spacing-md);
  border: 2px solid var(--color-primary);
  background: var(--color-white);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cookie-buttons button:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.cookie-buttons .accept-all {
  background: var(--color-primary);
  color: var(--color-white);
}

.cookie-buttons .accept-all:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
}

/* Cookie Settings Modal */
#cookie-settings-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 10000;
  display: none;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
}

#cookie-settings-modal.show {
  display: flex;
}

.cookie-modal-content {
  background: var(--color-white);
  padding: var(--spacing-xl);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  border: 3px solid var(--color-primary);
}

.cookie-modal-content h2 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.cookie-category {
  padding: var(--spacing-md);
  background: var(--color-light);
  margin-bottom: var(--spacing-md);
  border-left: 3px solid var(--color-primary);
}

.cookie-category h3 {
  font-size: 16px;
  margin-bottom: var(--spacing-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cookie-toggle {
  width: 50px;
  height: 26px;
  background: var(--color-accent);
  border-radius: 13px;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}

.cookie-toggle.active {
  background: var(--color-primary);
}

.cookie-toggle:before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background: var(--color-white);
  border-radius: 50%;
  top: 3px;
  left: 3px;
  transition: var(--transition);
}

.cookie-toggle.active:before {
  left: 27px;
}

.cookie-modal-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}

.cookie-modal-buttons button {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--color-primary);
  background: var(--color-white);
  color: var(--color-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cookie-modal-buttons button:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Responsive Design - Mobile First */
@media (max-width: 768px) {
  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 20px;
  }

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

  header nav {
    display: none;
  }

  .hero {
    padding: var(--spacing-xl) 0;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .stats .container {
    flex-direction: column;
  }

  .stat-item {
    width: 100%;
    padding: var(--spacing-md) 0;
  }

  .service-grid,
  .stats-grid,
  .resource-grid,
  .content-wrapper,
  .contact-options {
    flex-direction: column;
  }

  .service-card,
  .resource-card,
  .olympiad-card,
  .text-section,
  .contact-card {
    flex: 1 1 100%;
    min-width: 100%;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .footer-section {
    width: 100%;
  }

  #cookie-consent .container {
    flex-direction: column;
    text-align: center;
  }

  .cookie-buttons {
    width: 100%;
    justify-content: center;
  }

  .cookie-buttons button {
    flex: 1 1 auto;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .service-card,
  .resource-card {
    flex: 1 1 calc(50% - var(--spacing-lg));
  }

  .text-section {
    flex: 1 1 calc(50% - var(--spacing-lg));
  }
}

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

.service-card,
.testimonial-card,
.resource-card,
.olympiad-card {
  animation: fadeIn 0.6s ease forwards;
}

/* Smooth Scrolling */
html {
  scroll-padding-top: 100px;
}

/* Focus States for Accessibility */
a:focus,
button:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .mobile-menu-toggle,
  .mobile-menu,
  #cookie-consent,
  .cta-banner {
    display: none;
  }
}