html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #f5f7fa;
  color: #34495e;
  line-height: 1.7;
}

nav {
  background: #ffffffee;
  backdrop-filter: blur(10px);
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  gap: 28px;
  flex-wrap: wrap;
}

nav a {
  color: #4f6d8c;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 30px;
  font-weight: 500;
  transition: all .2s ease;
}

nav a:hover {
  background: #eef3f8;
}

nav a.active {
  background: #dfeaf4;
}

section {
  padding: 100px 20px;
  max-width: 1000px;
  margin: 0 auto;
}

h2 {
  color: #4f6d8c;
  font-size: 28px;
  margin-bottom: 25px;
}

h3 {
  font-weight: 400;
  color: #6b7f95;
  margin-top: -15px;
  margin-bottom: 40px;
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: center;
}

.photo {
  width: 100%;
  border-radius: 30px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

ul {
  padding-left: 20px;
}

ul li {
  margin-bottom: 12px;
}

.card {
  background: #ffffff;
  padding: 32px;
  border-radius: 30px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.06);
  font-size: 18px;
}

.contacts {
  text-align: center;
}

.contacts a {
  display: inline-block;
  margin: 15px 10px 0 10px;
  padding: 14px 28px;
  background: #4f6d8c;
  color: white;
  border-radius: 40px;
  text-decoration: none;
  font-weight: 500;
  transition: all .2s ease;
}

.contacts a:hover {
  background: #3e5a74;
  transform: translateY(-2px);
}

footer {
  text-align: center;
  padding: 50px;
  color: #8899aa;
  font-size: 14px;
}

.burger {
  display: none;
  cursor: pointer;
  font-size: 24px;
  color: #4f6d8c;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: #ffffff;
  padding: 15px 0;
}

.mobile-menu a {
  padding: 12px;
  text-align: center;
  color: #4f6d8c;
  text-decoration: none;
}

@media (max-width: 768px) {
  section { padding: 70px 20px; }
  .two-column { grid-template-columns: 1fr; gap: 40px; }
  nav ul { display: none; }
  .burger { display: block; }
  .mobile-menu.active { display: flex; }
}


/* ===== Carousel ===== */
.diploma-carousel{position:relative;margin-top:60px;overflow:hidden}
.carousel-track{display:flex;transition:transform .4s ease}
.carousel-track img{min-width:100%;border-radius:20px;box-shadow:0 15px 40px rgba(0,0,0,.08);cursor:zoom-in}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);background:rgba(79,109,140,.9);color:#fff;border:none;font-size:28px;padding:8px 16px;cursor:pointer;border-radius:50%;z-index:2}
.carousel-btn.prev{left:15px}
.carousel-btn.next{right:15px}

/* ===== Lightbox ===== */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,0);display:flex;justify-content:center;align-items:center;opacity:0;visibility:hidden;transition:all .35s ease;z-index:999}
.lightbox.active{background:rgba(0,0,0,.88);opacity:1;visibility:visible}
.lightbox img{max-width:90%;max-height:85%;border-radius:12px;transform:scale(.92);transition:transform .35s ease}
.lightbox.active img{transform:scale(1)}
body.no-scroll{overflow:hidden}

.lightbox-arrow{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.15);border:none;color:#fff;font-size:40px;padding:8px 18px;cursor:pointer;border-radius:50%}
.lightbox-arrow.left{left:30px}
.lightbox-arrow.right{right:30px}

.lightbox-dots{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);display:flex;gap:8px}
.lightbox-dot{width:8px;height:8px;background:rgba(255,255,255,.4);border-radius:50%;transition:.25s}
.lightbox-dot.active{background:#fff;transform:scale(1.3)}


/* ===== Improved Carousel Layout ===== */
.diploma-carousel { position: relative; margin-top: 60px; overflow: hidden; }

.carousel-track { display: flex; transition: transform .4s ease; }

.carousel-item { min-width: 33.333%; padding: 10px; box-sizing: border-box; }

.carousel-item img {
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
  cursor: zoom-in;
}

@media (max-width: 900px) {
  .carousel-item { min-width: 100%; }
}