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

:root {
  --primary-blue: #1e3a8a;
  --secondary-blue: #3b82f6;
  --accent-orange: #f97316;
  --light-bg: #f8fafc;
  --white: #ffffff;
  --text-dark: #1e293b;
  --text-gray: #64748b;
  --border-color: #e2e8f0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

/* Skip to main content - Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-blue);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
}

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

/* Header & Navigation */
header {
  background: linear-gradient(
    135deg,
    var(--primary-blue) 0%,
    var(--secondary-blue) 100%
  );
  color: white;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: white;
}

.logo-text h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.logo-tagline {
  font-size: 0.875rem;
  opacity: 0.9;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  padding: 0.5rem 0;
  position: relative;
}

nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-orange);
  transition: width 0.3s ease;
}

nav a:hover::after,
nav a:focus::after {
  width: 100%;
}

nav a:focus {
  outline: 2px solid var(--accent-orange);
  outline-offset: 4px;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Main Content */
main {
  margin-top: 80px;
}

section {
  padding: 5rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

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

h2 {
  font-size: 2.5rem;
  color: var(--primary-blue);
  margin-bottom: 1rem;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  color: var(--text-gray);
  font-size: 1.125rem;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section */
#home {
  background: linear-gradient(
      135deg,
      rgba(30, 58, 138, 0.95) 0%,
      rgba(59, 130, 246, 0.95) 100%
    ),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%231e3a8a" width="1200" height="600"/></svg>');
  background-size: cover;
  background-position: center;
  color: white;
  text-align: center;
  padding: 8rem 2rem 6rem;
  margin-top: -80px;
  padding-top: calc(8rem + 80px);
}

.hero-content h2 {
  color: white;
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.5rem;
  margin-bottom: 2.5rem;
  opacity: 0.95;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 1rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
}

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

.btn-primary:hover,
.btn-primary:focus {
  background: #ea580c;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

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

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

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-gray);
}

.mission-box {
  background: linear-gradient(
    135deg,
    var(--primary-blue) 0%,
    var(--secondary-blue) 100%
  );
  color: white;
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(30, 58, 138, 0.2);
}

.mission-box h3 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

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

.rule-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  border: 2px solid var(--border-color);
  transition: all 0.3s ease;
}

.rule-card:hover,
.rule-card:focus-within {
  border-color: var(--secondary-blue);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.15);
  transform: translateY(-4px);
}

.rule-number {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-orange) 0%, #dc2626 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.rule-card h3 {
  color: var(--primary-blue);
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.rule-card p {
  color: var(--text-gray);
  line-height: 1.6;
}

/* Games Section */
.games-table-container {
  overflow-x: auto;
  margin-top: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

thead {
  background: linear-gradient(
    135deg,
    var(--primary-blue) 0%,
    var(--secondary-blue) 100%
  );
  color: white;
}

th {
  padding: 1.25rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  padding: 1.25rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

tbody tr {
  transition: background-color 0.2s ease;
}

tbody tr:hover {
  background-color: var(--light-bg);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* Registration Form */
.form-container {
  max-width: 700px;
  margin: 2rem auto;
  background: white;
  padding: 3rem;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
  font-weight: 500;
}

.required {
  color: var(--accent-orange);
}

input,
select,
textarea {
  width: 100%;
  padding: 0.875rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--secondary-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
  width: auto;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info {
  background: linear-gradient(
    135deg,
    var(--primary-blue) 0%,
    var(--secondary-blue) 100%
  );
  color: white;
  padding: 2.5rem;
  border-radius: 12px;
}

.contact-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-details h3 {
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
}

/* Footer */
footer {
  background: var(--text-dark);
  color: white;
  text-align: center;
  padding: 2rem;
}

footer p {
  opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav ul {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-blue);
    flex-direction: column;
    padding: 1rem;
    gap: 0;
    display: none;
  }

  nav ul.active {
    display: flex;
  }

  nav li {
    width: 100%;
  }

  nav a {
    display: block;
    padding: 1rem;
  }

  .hero-content h2 {
    font-size: 2.5rem;
  }

  .hero-content p {
    font-size: 1.25rem;
  }

  .about-content,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  h2 {
    font-size: 2rem;
  }

  section {
    padding: 3rem 1.5rem;
  }

  .form-container {
    padding: 2rem 1.5rem;
  }
}

/* Focus styles for accessibility */
*:focus-visible {
  outline: 3px solid var(--accent-orange);
  outline-offset: 2px;
}

button:focus-visible,
.btn:focus-visible {
  outline-offset: 4px;
}