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

body {
 font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
}

/* HEADER */
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.5);
  z-index: 100;
}

header .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 40px;

  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo img {
  width: 140px;
}

.main-nav,
.mode-toggle {
  display: flex;
  align-items: center;
  gap: 30px;
}

header a {
  color: #1F4E79;
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  transition: 0.3s;
}

header a:hover {
  color: rgb(45, 241, 255);
}

/* MAIN */
main {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;

  max-width: 1100px;
  margin: 0 auto;
  padding: 150px 20px 50px;
}

/* Ustoz kartasi */
.ustozim {
  flex: 1 1 300px;
  max-width: 320px;
  background: #fff;
  border: 2px solid #130f61;
  border-radius: 20px;
  padding: 25px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.ustozim:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.ustozim img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  margin-bottom: 20px;
  object-fit: cover;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.ustoz-text h2 {
  font-size: 18px;
  color: #222;
  line-height: 1.5;
}