/* style.css */
:root {
  --olympic-blue: #0085C7;
  --olympic-yellow: #F4C300;
  --olympic-black: #000000;
  --olympic-green: #009F3D;
  --olympic-red: #DF0024;
  --light-gray: #f8f9fa;
  --dark-gray: #343a40;
  --white: #ffffff;
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --transition: all 0.3s ease;
}

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

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

header {
  background-color: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--olympic-blue);
  text-decoration: none;
}

.logo img {
  height: 40px;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--dark-gray);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--olympic-blue);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--olympic-blue);
  transition: var(--transition);
}

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

main {
  padding: 3rem 0;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--dark-gray);
}

h1 {
  font-size: 2.75rem;
}

h2 {
  font-size: 2rem;
  position: relative;
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(to right, var(--olympic-blue), var(--olympic-green));
}

p {
  margin-bottom: 1.5rem;
}

.chart-container {
  background-color: var(--white);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

canvas {
  width: 100% !important;
  height: auto !important;
  max-height: 500px;
}

.hero {
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('hero_bg.jpg');
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: 6rem 0;
  margin-bottom: 3rem;
  text-align: center;
  border-radius: 12px;
}

.hero h1 {
  color: var(--white);
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.hero p {
  max-width: 800px;
  margin: 0 auto 2rem auto;
  font-size: 1.2rem;
}

.olympic-dates {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.2);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 1.1rem;
}

.feature-boxes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.feature-box {
  background-color: var(--white);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.feature-box:hover {
  transform: translateY(-5px);
}

.feature-box img {
  width: 80px;
  height: 80px;
  margin-bottom: 1.5rem;
}

.feature-box h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.note {
  background-color: rgba(244, 195, 0, 0.1);
  border-left: 4px solid var(--olympic-yellow);
  padding: 1.5rem;
  border-radius: 8px;
  margin: 1.5rem 0;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.info-card {
  background-color: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.info-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.info-card-content {
  padding: 1.5rem;
}

.olympic-rings {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin: 2rem 0;
}

.ring {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 4px solid;
}

.ring:nth-child(1) { border-color: var(--olympic-blue); }
.ring:nth-child(2) { border-color: var(--olympic-yellow); }
.ring:nth-child(3) { border-color: var(--olympic-black); }
.ring:nth-child(4) { border-color: var(--olympic-green); }
.ring:nth-child(5) { border-color: var(--olympic-red); }

footer {
  background-color: var(--dark-gray);
  color: var(--white);
  padding: 3rem 0;
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-column {
  flex: 1;
  min-width: 250px;
}

.footer-column h3 {
  color: var(--white);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #adb5bd;
  text-decoration: none;
  transition: var(--transition);
}

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

.copyright {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #adb5bd;
}

/* Responsive design */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  
.hero {
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('hero_bg.jpg');
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: 6rem 0;
  margin-bottom: 3rem;
  text-align: center;
  border-radius: 12px;
}

.hero h1,
.hero p,
.hero .olympic-dates {
  position: relative;
  z-index: 1;
}

  
  h1 {
    font-size: 2.25rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
}