/* Base Styles */
:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-red: #dc2626;
  --color-yellow: #facc15;
  --color-green: #22c55e;
  --color-gray: #71717a;
  --color-dark: #18181b;
  --color-darker: #09090b;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--color-black);
  color: var(--color-white);
  line-height: 1.5;
  overflow-x: hidden;
}

/* Loading Animation */
body:not(.loaded) {
  opacity: 0;
}

body.loaded {
  opacity: 1;
  transition: opacity 0.5s ease-in-out;
}

/* Typography */
h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  margin-bottom: 2rem;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.large-text {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.emphasis-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-yellow);
  margin: 2rem 0;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.section {
  padding: 5rem 1rem;
}

/* Colors */
.text-red { color: var(--color-white); }
.text-yellow { color: var(--color-yellow); }
.text-green { color: var(--color-green); }

.bg-black { background-color: var(--color-black); }
.bg-dark { background-color: var(--color-dark); }
.bg-darker { background-color: var(--color-darker); }
.bg-red { background-color: var(--color-red); }

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  padding: 1rem 0;
}

.navbar.scrolled {
  background: rgba(0, 0, 0, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.nav-brand {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-white);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--color-white);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--color-yellow);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-yellow);
  transition: var(--transition);
}

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

/* Hero Section */
.hero {
  height: 100vh;
  background-image: url('header.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.4) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 0 2rem;
}

.hero h1 {
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s ease-out 0.5s forwards;
}

.subtitle {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s ease-out 1s forwards;
}

.tagline {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 1s ease-out 1.5s forwards;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 30px;
  height: 30px;
  border: 2px solid var(--color-white);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

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

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

/* Animation Classes */
.fade-in {
  opacity: 0;
  animation: fadeInUp 1s ease-out forwards;
}

.slide-in {
  opacity: 0;
  animation: slideIn 1s ease-out 0.5s forwards;
}

.slide-in-delay {
  opacity: 0;
  animation: slideInDelay 1s ease-out 1s forwards;
}

.pulse-animation {
  animation: pulse 2s infinite;
}

.fade-in-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.fade-in-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.hover-lift {
  transition: var(--transition);
}

.hover-lift:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Comparison Grid */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.comparison-card {
  padding: 2rem;
  border: 2px solid;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.comparison-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(34, 197, 94, 0.05) 100%);
  opacity: 0;
  transition: var(--transition);
}

.comparison-card:hover::before {
  opacity: 1;
}

.border-green { border-color: var(--color-green); }
.border-red { border-color: var(--color-red); }

.comparison-card ul {
  list-style: none;
  margin-top: 1rem;
}

.comparison-card li {
  padding: 0.5rem 0;
  position: relative;
  padding-left: 1.5rem;
}

.comparison-card li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-yellow);
}

/* Topics Grid */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.topic-card {
  padding: 2rem;
  border: 1px solid var(--color-gray);
  border-radius: 12px;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
}

.topic-card:hover {
  border-color: var(--color-yellow);
  background: rgba(250, 204, 21, 0.05);
}

.icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--color-yellow);
}

.topic-duration {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--color-gray);
  font-weight: 500;
}

/* Content Blocks */
.content-block {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.content-block p {
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

/* CTA Buttons */
.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--color-red);
  color: var(--color-white);
  text-decoration: none;
  border: none;
  border-radius: 8px;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.cta-button:hover::before {
  left: 100%;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(220, 38, 38, 0.3);
}

.cta-button.black {
  background: var(--color-black);
  border: 2px solid var(--color-white);
}

.cta-button.outline {
  background: transparent;
  border: 2px solid var(--color-white);
  color: var(--color-white);
}

.cta-button.outline:hover {
  background: var(--color-white);
  color: var(--color-black);
}

/* Footer */
.footer {
  background: var(--color-darker);
  padding: 3rem 0 1rem;
  border-top: 1px solid var(--color-gray);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-white);
}

.footer-links {
  display: flex;
  gap: 2rem;
}

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

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

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

.footer-social a {
  color: var(--color-gray);
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-gray);
  color: var(--color-gray);
  font-size: 0.875rem;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal-content {
  background-color: var(--color-dark);
  margin: 5% auto;
  padding: 2rem;
  border: 1px solid var(--color-gray);
  border-radius: 12px;
  width: 90%;
  max-width: 600px;
  position: relative;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.close {
  color: var(--color-gray);
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition);
}

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

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 600;
  color: var(--color-white);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem;
  border: 1px solid var(--color-gray);
  border-radius: 6px;
  background: var(--color-black);
  color: var(--color-white);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-yellow);
  box-shadow: 0 0 0 3px rgba(250, 204, 21, 0.1);
}

/* Topic Details */
.topic-details {
  margin-top: 1.5rem;
}

.detail-item {
  margin-bottom: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
}

.detail-item strong {
  color: var(--color-yellow);
}

.detail-item ul {
  margin-top: 0.5rem;
  padding-left: 1.5rem;
}

.detail-item li {
  margin-bottom: 0.25rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-content {
    padding: 0 1rem;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .comparison-grid,
  .topics-grid {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    margin: 10% auto;
    width: 95%;
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 3rem 1rem;
  }
  
  .hero {
    background-attachment: scroll;
  }
  
  .cta-button {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
}

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

/* Focus styles for accessibility */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--color-yellow);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .navbar,
  .cta-buttons,
  .footer {
    display: none;
  }
  
  .hero {
    height: auto;
    background: none;
  }
}