@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');
:root {
  --navbar-bg: #000000;
  --main-blue: #6495ED;
  --section-bg: #f8f9fa;
  --card-bg: #fff;
  --text-color: #181818;
  --hover-green: #D8F3DC;
  --box-shadow: 0 8px 24px rgba(100,149,237,0.25);
  --mint: #D8F3DC;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image: url('images/background.jpg');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  opacity: 0.16;
  pointer-events: none;
}

body {
  font-family: 'Poppins', sans-serif;
  background: var(--section-bg);
  margin: 0;
  padding: 0;
  color: var(--text-color);
  overflow-x: hidden;
  padding-top: 70px;
}
header {
  background: var(--navbar-bg);
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 70px;
  z-index: 1000;
  box-shadow: var(--box-shadow);
}
.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100vw;
  max-width: 1200px;
  margin: 0 auto;
  box-sizing: border-box;
  padding: 0 1rem;
  position: relative;
  z-index: 11;
}
.nav-logo {
  height: 48px;
  margin: 0 10px;
  flex-shrink: 0;
}
.nav-logo.large {
  height: 80px;
  margin: 0 10px;
  flex-shrink: 0;
  object-fit: contain;
}
.nav-links {
  display: flex;
  gap: 36px;
  justify-content: center;
  align-items: center;
}
nav a {
  color: #fff;
  font-weight: 500;
  text-transform: uppercase;
  text-decoration: none;
  padding: 8px 12px;
  font-size: 1rem;
  border-radius: 5px;
  transition: background 0.3s, color 0.3s;
  white-space: nowrap;
}
nav a:hover {
  background: var(--hover-green);
  color: var(--text-color);
}
.hamburger {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  margin-left: 10px;
}
.hero-card,
.poster-card,
.coordinators-card,
.contact-card,
.members-card,
.about-card {
  position: relative;
  z-index: 1;
  background: var(--mint);
  padding: 3rem 2rem;
  border-radius: 28px;
  box-shadow: var(--box-shadow);
  max-width: 1200px;
  margin: 4rem auto 2rem auto;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero-card h1,
.poster-card h2,
.coordinators-card h2,
.contact-card h2,
.members-card h2,
.about-card h2 {
  color: var(--main-blue);
  font-weight: 700;
  margin-top: 0.8rem;
  margin-bottom: 2rem;
  text-align: center;
}
.hero-registerblock {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
}
.poster-thumb {
  width: 98px;
  height: 98px;
  object-fit: cover;
  border-radius: 11px;
  box-shadow: 0 2px 9px rgba(100,149,237,0.10);
  margin-bottom: 0.5rem;
}
.mint-block {
  background: var(--mint);
  color: var(--main-blue);
  padding: 16px 18px;
  font-size: 1.08rem;
  border-radius: 10px;
  margin-bottom: 1.2rem;
  box-shadow: 0 2px 8px rgba(100,149,237,0.05);
  max-width: 600px;
  text-align: center;
}
.btn-green {
  background: var(--main-blue);
  color: var(--card-bg);
  border: none;
  padding: 16px 44px;
  border-radius: 11px;
  font-weight: 700;
  font-size: 1.13rem;
  box-shadow: 0 4px 14px rgba(68, 104, 215, 0.6);
  cursor: pointer;
  transition: background 0.25s, color 0.25s, box-shadow 0.3s;
  display: inline-block;
  margin-top: 18px;
}
.btn-green:hover {
  background: var(--hover-green);
  color: var(--text-color);
  box-shadow: 0 6px 18px rgba(100,149,237,0.35);
}
.poster-card h2 {
  font-weight: 700;
  margin-bottom: 1.2rem;
}
.poster-img {
  width: 100%;
  max-width: 600px;
  border-radius: 24px;
  box-shadow: var(--box-shadow);
  margin-bottom: 1.7rem;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.poster-card a.btn-green {
  margin-left: auto;
  margin-right: auto;
  display: block;
}
.coordinators-container {
  display: flex;
  gap: 2.2rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2rem;
}
.coordinator-box {
  background: var(--card-bg);
  border-radius: 22px;
  box-shadow: 0 6px 20px rgba(14,55,54,0.15);
  padding: 2rem 0.9rem 2rem 0.9rem;
  width: 285px;
  min-height: 100px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.coordinator-img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 18px;
  border: 3px solid var(--main-blue);
}
.coordinator-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--main-blue);
  margin-bottom: 8px;
}
.coordinator-role {
  color: var(--text-color);
  font-size: 1.02rem;
  font-weight: 550;
}
.members-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-top: 2rem;
  justify-items: center;
  width: 100%;
}
.member-box {
  background: var(--card-bg);
  border-radius: 22px;
  box-shadow: 0 6px 20px rgba(14,55,54,0.15);
  padding: 2.2rem 0.7rem 2rem 0.7rem;
  width: 285px;
  min-height: 100px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.member-img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 18px;
  border: 3px solid var(--main-blue);
}
.member-name {
  font-size: 1.13rem;
  font-weight: 700;
  color: var(--main-blue);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}
.member-role {
  color: var(--text-color);
  font-size: 1.02rem;
  font-weight: 550;
  letter-spacing: 0.03em;
}
.contact-card {
  padding-bottom: 2.7rem;
  text-align: center;
}
.contact-card h2 {
  margin-bottom: 1.7rem;
  color: var(--main-blue);
  text-align: center;
}
.contact-card p {
  display: block;
  font-size: 1.08rem;
  margin-bottom: 1.1rem;
  font-weight: 500;
  text-align: center;
}
.social {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.2rem;
  align-items: center;
}
.social a .bx {
  background: var(--mint);
  color: var(--main-blue);
  font-size: 27px;
  padding: 10px;
  border-radius: 50%;
  transition: background 0.3s, color 0.3s;
}
.social a .bx:hover {
  background: var(--main-blue);
  color: var(--section-bg);
}
footer {
  background: var(--navbar-bg);
  color: var(--card-bg);
  font-size: 1rem;
  text-align: center;
  padding: 1.5rem 2rem;
  margin-top: 2.8rem;
  border-radius: 0 0 24px 24px;
}
.about-card {
  background: var(--mint);
  border-radius: 28px;
  box-shadow: var(--box-shadow);
  max-width: 1200px;
  margin: 4rem auto 2rem auto;
  padding: 2.5rem 2.5rem;
  color: var(--text-color);
  text-align: left;
  position: relative;
  z-index: 1;
  font-size: 1.13rem;
  box-sizing: border-box;
}
.about-card h2 {
  text-align: center;
  color: var(--main-blue);
  margin-bottom: 2rem;
  font-weight: 700;
  font-size: 2.2rem;
  letter-spacing: 0.01em;
}
.about-content h3 {
  color: var(--main-blue);
  font-weight: 700;
  margin-top: 2.2rem;
  margin-bottom: 0.7rem;
  font-size: 1.3rem;
  letter-spacing: 0.01em;
}
.about-content p {
  margin-bottom: 1.1rem;
  line-height: 1.68;
  font-size: 1.12rem;
  box-sizing: border-box;
}
.about-content ul.about-highlights {
  margin-top: 1.2rem;
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  font-weight: 500;
  box-sizing: border-box;
}
.about-content ul.about-highlights li {
  margin-bottom: 0.85rem;
  font-size: 1.08rem;
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(100,149,237,0.09);
  padding: 0.5rem 1.25rem;
  color: var(--text-color);
  box-sizing: border-box;
}
.about-photo-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 2rem;
}
.about-photo {
  width: 95%;
  max-width: 540px;
  height: auto;
  aspect-ratio: 4 / 2;
  object-fit: cover;
  border-radius: 20px;
  box-shadow: 0 4px 16px rgba(100,149,237,0.18);
  border: 4px solid var(--card-bg);
  transition: width 0.3s, height 0.3s;
  display: block;
  margin: 0 auto;
}
.countdown-card, .agenda-card {
  background: rgba(216, 243, 220, 0.7); !important;
  border-radius: 28px;
  box-shadow: var(--box-shadow);
  max-width: 1200px;
  margin: 2rem auto;
  padding: 2rem 2.5rem;
  color: var(--text-color);
  text-align: center;
  width: 100%;
  box-sizing: border-box;
}
.countdown-card h2, .agenda-card h2 {
  color: var(--main-blue);
  margin-bottom: 1.8rem;
  font-weight: 700;
}
#countdown-timer {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.4rem;
  font-weight: 600;
  font-size: 1.5rem;
  color: var(--main-blue);
  width: 100%;
  box-sizing: border-box;
}
#countdown-timer div {
  background: var(--card-bg);
  border-radius: 14px;
  padding: 1rem 1.2rem;
  margin: 0 auto;
  box-shadow: 0 2px 10px rgba(14,55,54,0.09);
  min-width: 72px;
  box-sizing: border-box;
}
#countdown-timer span {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 4px;
  font-weight: 700;
}
@media (max-width: 1100px) {
  .navbar-content, .hero-card, .poster-card, .coordinators-card, .contact-card, .members-card, .about-card {
    max-width: 100%;
  }
  .members-card, .coordinators-card, .hero-card, .poster-card, .contact-card, .about-card {
    padding: 2.1rem 0.6rem;
  }
  .coordinator-box, .member-box {
    width: 215px;
    min-height: 210px;
    padding: 1.2rem 0.25rem 1.3rem 0.25rem;
  }
}
@media (max-width: 900px) {
  .members-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.7rem;
  }
  .coordinators-container {
    gap: 1.2rem;
  }
}
@media (max-width: 800px) {
  .about-card {
    padding: 1.3rem 0.7rem;
    margin: 2rem 0.3rem;
    max-width: 100vw;
    box-sizing: border-box;
  }
  .about-card h2 {
    font-size: 1.3rem;
    text-align: center;
  }
  .about-content h3 {
    font-size: 1.1rem;
  }
  .about-photo {
    width: 98vw;
    max-width: 98vw;
    aspect-ratio: 5 / 3;
    border-radius: 14px;
  }
}
@media (max-width: 700px) {
  header {
    height: 56px;
    padding: 0 0.5rem;
  }
  .navbar-content {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100vw;
    padding: 0 8px;
    position: relative;
  }
  .nav-logo, .nav-logo.large {
    height: 28px;
    margin: 0 2px;
    max-width: 80px;
  }
  .hamburger {
    display: block;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    margin-left: 10px;
  }
  .nav-links {
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    width: 100vw;
    gap: 0;
    background: #000;
    box-shadow: 0 4px 16px rgba(100,149,237,0.14);
    padding-bottom: 12px;
    z-index: 99;
    display: none;
  }
  .nav-links.open {
    display: flex;
  }
  nav a {
    width: 100vw;
    padding: 12px 0;
    text-align: center;
    font-size: 1.14rem;
    border-bottom: 1px solid #222;
    color: #fff;
    margin: 0;
  }
}
@media (max-width: 650px) {
  .hero-card,
  .poster-card,
  .coordinators-card,
  .contact-card,
  .members-card {
    padding: 1.1rem 0.15rem;
  }
  .members-container {
    grid-template-columns: 1fr;
    gap: 1.1rem;
  }
  .coordinators-container {
    flex-direction: column;
    gap: 1.1rem;
  }
  .coordinator-box,
  .member-box {
    width: 100%;
    min-height: 120px;
    padding: 1.1rem 0.1rem 1.1rem 0.1rem;
  }
  .btn-green {
    padding: 12px 24px;
    font-size: 1rem;
  }
  .nav-links a {
    font-size: 1.1rem;
    padding: 10px 0;
    display: block;
  }
  .about-photo {
    width: 98vw;
    max-width: 98vw;
    border-radius: 14px;
  }
}
@media (max-width: 440px) {
  .hero-card h1,
  .poster-card h2,
  .coordinators-card h2,
  .contact-card h2,
  .members-card h2,
  .about-card h2 {
    font-size: 1.08rem;
  }
  .btn-green {
    padding: 12px 18px;
    font-size: 0.92rem;
  }
  .about-card {
    padding: 0.6rem 0.1rem;
  }
  .about-photo {
    width: 100vw;
    min-width: 160px;
    border-radius: 10px;
  }
}
@media (max-width: 700px) {
  .countdown-card, .agenda-card {
    background: rgba(216, 243, 220, 0.7) !important;
  }
}