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

:root {
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --dark-color: #1e293b;
  --light-color: #f8fafc;
  --text-color: #334155;
  --text-light: #64748b;
  --border-color: #e2e8f0;
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-color);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo .logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark-color);
}

.nav-logo .accent {
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--dark-color);
  margin: 3px 0;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  color: white;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  line-height: 1.6;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: #fbbf24;
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background: var(--gradient-secondary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Floating Card */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.floating-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow-xl);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.card-header {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.card-dots {
  display: flex;
  gap: 0.5rem;
}

.card-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ff5f56;
}

.card-dots span:nth-child(2) {
  background: #ffbd2e;
}

.card-dots span:nth-child(3) {
  background: #27ca3f;
}

.card-content {
  font-family: "Courier New", monospace;
  font-size: 0.875rem;
  line-height: 1.5;
}

.code-line {
  margin-bottom: 0.5rem;
}

.indent {
  padding-left: 1rem;
}

.keyword {
  color: #ff79c6;
}
.variable {
  color: #8be9fd;
}
.string {
  color: #f1fa8c;
}
.function {
  color: #50fa7b;
}

/* Schedule Section */
.schedule {
  padding: 5rem 0;
  background: white;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--dark-color);
}

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: 3rem;
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  margin-bottom: 2rem;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
  text-align: right;
  margin-right: 2rem;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: 2rem;
}

.timeline-time {
  background: var(--gradient-primary);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.875rem;
  white-space: nowrap;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.timeline-content {
  background: white;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  width: calc(50% - 1rem);
  margin-top: 2rem;
}

.timeline-content h3 {
  color: var(--dark-color);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.timeline-content p {
  color: var(--text-light);
  line-height: 1.6;
}

/* Rules Section */
.rules {
  padding: 5rem 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.rules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.rule-card {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.rule-card.allowed {
  border-top: 4px solid var(--success-color);
}

.rule-card.forbidden {
  border-top: 4px solid var(--danger-color);
}

.rule-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.rule-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--dark-color);
}

.rule-card ul {
  list-style: none;
  text-align: left;
}

.rule-card li {
  padding: 0.5rem 0;
  color: var(--text-color);
  position: relative;
  padding-left: 1.5rem;
}

.allowed li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success-color);
  font-weight: bold;
}

.forbidden li::before {
  content: "✗";
  position: absolute;
  left: 0;
  color: var(--danger-color);
  font-weight: bold;
}

.requirements {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}

.requirements h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--dark-color);
  text-align: center;
}

.req-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.req-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.req-number {
  background: var(--gradient-primary);
  color: white;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.req-content h4 {
  color: var(--dark-color);
  margin-bottom: 0.25rem;
}

.req-content p {
  color: var(--text-light);
  font-size: 0.875rem;
}

.warning {
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  padding: 1rem;
  border-radius: 8px;
  border-left: 4px solid #f59e0b;
  color: #92400e;
}

/* Contact Section */
.contact {
  padding: 5rem 0;
  background: var(--dark-color);
  color: white;
}

.contact .section-title,
.contact .section-subtitle {
  color: white;
}

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

.contact-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: 16px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.contact-card h3 {
  margin-bottom: 1rem;
  color: #fbbf24;
}

.contact-card p {
  opacity: 0.9;
  line-height: 1.6;
}

/* Registration Section */
.registration {
  padding: 5rem 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.form-container {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.form-container iframe {
  width: 100%;
  max-width: 640px;
  height: 1166px;
  border: none;
}

/* Footer */
.footer {
  background: #0f172a;
  color: white;
  text-align: center;
  padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-lg);
    padding: 2rem 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
    padding: 2rem 1rem;
  }

  .hero-title {
    font-size: 2.5rem;
    line-height: 1.2;
  }

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

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    flex-direction: column;
    padding-left: 50px;
    margin-bottom: 2rem;
  }

  .timeline-item:nth-child(odd) {
    flex-direction: column;
  }

  .timeline-item:nth-child(odd) .timeline-content {
    text-align: left;
    margin-right: 0;
    margin-left: 0;
  }

  .timeline-item:nth-child(even) .timeline-content {
    margin-left: 0;
  }

  .timeline-time {
    left: 20px;
    transform: translateX(-50%);
    position: relative;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    width: auto;
    min-width: 120px;
  }

  .timeline-content {
    width: 100%;
    margin-top: 1rem;
  }

  .rules-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero-buttons {
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
  }

  .contact-info {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .form-container {
    margin: 1rem;
    border-radius: 12px;
  }

  .form-container iframe {
    height: 1000px;
  }

  .container {
    padding: 0 1rem;
  }

  .hero,
  .schedule,
  .rules,
  .contact,
  .registration {
    padding: 3rem 0;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
    line-height: 1.1;
  }

  .section-title {
    font-size: 2rem;
    margin-bottom: 1rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .btn {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1rem;
  }

  .nav-container {
    padding: 0 1rem;
  }

  .nav-logo .logo-text {
    font-size: 1.25rem;
  }

  .hero-container {
    padding: 1rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 2rem;
  }

  .timeline-time {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    min-width: 100px;
  }

  .timeline-content h3 {
    font-size: 1.125rem;
  }

  .rule-card {
    padding: 1.5rem;
  }

  .rule-card h3 {
    font-size: 1.25rem;
  }

  .requirements {
    padding: 1.5rem;
  }

  .req-item {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }

  .form-container {
    margin: 0.5rem;
  }

  .form-container iframe {
    height: 900px;
  }

  .hero,
  .schedule,
  .rules,
  .contact,
  .registration {
    padding: 2rem 0;
  }
}

@media (max-width: 320px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .form-container iframe {
    height: 800px;
  }

  .container {
    padding: 0 0.75rem;
  }
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

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

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