:root {
  --color-primary: #5a1e20;
  --color-secondary: #a37b42;
  --color-text-dark: #333;
  --color-text-light: #f5f5f5;
  --color-background: #fcfaf7;

  --color-2025-main: #e0f2f1;
  --color-2024-main: #fff7fd;
  --color-2023-main: #e4ebff;
  --color-2022-main: #f7f6ea;
  --color-2021-main: #ffdcdc;
  --color-2020-main: #f9e9d9;

  --logo-color-2025: #4db6ac;
  --logo-color-2024: #b39ddb;
  --logo-color-2023: #657aff;
  --logo-color-2022: #c9af43;
  --logo-color-2021: #e76666;
  --logo-color-2020: #e65100;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text-dark);
  line-height: 1.6;
  background-color: var(--color-background);
}

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

a {
  text-decoration: none;
  color: var(--color-primary);
  transition: color 0.3s ease;
}

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

.main-header {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color 0.3s ease;
}

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

.logo a {
  font-family: var(--font-heading);
  font-size: 1.2em;
  font-weight: 700;
  color: var(--color-primary);
  transition: color 0.5s ease;
}

.logo-2025 .logo a {
  color: var(--logo-color-2025);
}
.logo-2024 .logo a {
  color: var(--logo-color-2024);
}
.logo-2023 .logo a {
  color: var(--logo-color-2023);
}
.logo-2022 .logo a {
  color: var(--logo-color-2022);
}
.logo-2021 .logo a {
  color: var(--logo-color-2021);
}
.logo-2020 .logo a {
  color: var(--logo-color-2020);
}

.main-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
}

.main-nav li {
  margin-left: 30px;
}

.main-nav .nav-link {
  font-weight: 700;
  color: var(--color-text-dark);
  padding: 5px 0;
  position: relative;
}

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

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

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 20px;
  position: relative;
  z-index: 101;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin-bottom: 5px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.menu-toggle.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.section {
  padding: 80px 0;
  text-align: center;
}

.conf-section {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition: background-color 0.5s ease;
}

.conf-overlay {
  display: none;
}

.conf-content {
  z-index: 2;
  position: relative;
}

.conf-year-title {
  font-family: var(--font-heading);
  font-size: 3em;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 5px;
  display: inline-block;
  padding-bottom: 5px;
  color: var(--color-primary);
  border-bottom: 3px solid var(--color-secondary);
}

.conf-main-title {
  font-family: var(--font-heading);
  font-size: 2.2em;
  font-weight: 400;
  margin-bottom: 10px;
  color: var(--color-text-dark);
}

.conf-subtitle {
  font-size: 1.2em;
  font-weight: 300;
  margin-bottom: 20px;
  color: var(--color-text-dark);
}

.conf-location {
  font-size: 1.1em;
  font-weight: 400;
  margin-bottom: 40px;
  color: var(--color-text-dark);
}

.conf-results {
  max-width: 800px;
  margin: 30px auto 40px;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  text-align: left;
  background-color: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.conf-results h4 {
  font-family: var(--font-heading);
  font-size: 1.5em;
  margin-bottom: 15px;
  color: var(--color-primary);
}

.conf-results p {
  margin-bottom: 10px;
}

ul {
  list-style-type: none;
}

li {
  font-size: 1.2em;
}

.conf-results ul {
  padding: 0;
  margin-top: 15px;
}

.conf-results li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 2em;
  font-size: 1em;
}

.conf-results li::before {
  content: "✅";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 1em;
}

.image-gallery-archive {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 40px auto;
  flex-wrap: wrap;
  max-width: 900px;
}

.image-gallery-archive .gallery-item {
  flex: 1 1 45%;
  max-width: 400px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-gallery-archive .gallery-item:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.image-gallery-archive .gallery-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.image-gallery-archive .gallery-item img:hover {
  transform: scale(1.05);
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 5px;
  font-weight: 700;
  text-transform: uppercase;
  transition: all 0.3s ease;
  margin-top: 20px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  border: 2px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-primary);
  transform: translateY(-3px);
}

.link-secondary {
  display: inline-block;
  margin-top: 0.4em;
  color: var(--color-secondary);
  font-weight: 700;
  border-bottom: 1px dashed var(--color-secondary);
}

.link-secondary:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.separator {
  border: none;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  margin: 0 10%;
}

.conf-2025 {
  background-color: var(--color-2025-main);
}

.conf-2024 {
  background-color: var(--color-2024-main);
}

.conf-2023 {
  background-color: var(--color-2023-main);
}

.conf-2022 {
  background-color: var(--color-2022-main);
}

.conf-2021 {
  background-color: var(--color-2021-main);
}

.conf-2020 {
  background-color: var(--color-2020-main);
}

.main-footer {
  background-color: var(--color-text-dark);
  color: var(--color-text-light);
  padding: 1em 0;
  font-size: 0.9em;
  text-align: center;
}

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

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out;
  }
  .main-nav.is-open {
    max-height: 100vh;
    background-color: rgba(255, 255, 255, 0.98);
  }

  .main-nav ul {
    flex-direction: column;
    padding: 10px 20px;
  }
  .main-nav li {
    margin: 0;
    border-bottom: 1px solid #eee;
  }
  .main-nav .nav-link {
    display: block;
    padding: 10px 0;
  }
  .conf-section {
    min-height: auto;
    padding: 40px 0;
  }

  .conf-year-title {
    margin-top: 1em;
    font-size: 2em;
    letter-spacing: 2px;
  }

  .conf-main-title {
    font-size: 1.5em;
  }
  .conf-results {
    padding: 20px;
    margin: 20px auto;
  }

  .image-gallery-archive {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .image-gallery-archive .gallery-item {
    width: 90%;
    max-width: 400px;
  }
  .image-gallery-archive .gallery-item img {
    height: 200px;
  }
}

@media (max-width: 480px) {
  .logo a {
    font-size: 0.9em;
  }

  .conf-year-title {
    font-size: 1.4em;
    letter-spacing: 1px;
  }

  .conf-main-title {
    font-size: 1.2em;
  }

  .conf-results {
    padding: 15px;
  }
  .conf-results li {
    font-size: 1em;
  }
}