* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: #333;
  background: linear-gradient(135deg, #64d3ff 0%, #ff4e4e 100%);
  line-height: 1.6;
}
.container {
  max-width: 1400px;
  margin: 0 auto;
  background-color: #ffffff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.2);
}
/* HEADER */
header {
  background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
  padding: 1.5rem 2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
.header_row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 2px;
  order: 1;
}
.naslov {
  font-size: 1.3rem;
  color: #ffffff;
  order: 2;
  flex-grow: 1;
  text-align: center;
}
.izbornik {
  order: 3;
}
.izbornik ul {
  display: flex;
  gap: 0.5rem;
  list-style: none;
  flex-wrap: wrap;
}
.izbornik ul li {
  padding: 0.6rem 1.2rem;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: #ffffff;
  cursor: pointer;
}
.izbornik ul li:hover {
  background-color: #a82c2c;
}
/* MAIN */
main {
  flex: 1;
  padding: 3rem 2rem;
  background-color: #f7fafc;
}
.main_row_1,
.main_row_2 {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}
article {
  flex: 1;
  min-width: 300px;
  background-color: #ffffff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
  display: flex;
  flex-direction: column;
}
article h2 {
  color: #2d3748;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  border-bottom: 3px solid #a82c2c;
  padding-bottom: 0.5rem;
}
article img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 1rem;
  object-fit: cover;
}
article p {
  color: #4a5568;
  text-align: justify;
  margin-top: auto;
}
.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  overflow: hidden;
  border-radius: 8px;
  margin-bottom: 1rem;
}
.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
}
/* FOOTER */
footer {
  background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
  color: #a0aec0;
  padding: 2rem;
}
.footer_row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.autor,
.datum {
  font-size: 0.95rem;
}
/* MOBILNI - 320px do 899px */
@media only screen and (max-width: 899px) {
  body {
      background: linear-gradient(135deg, #434343 0%, #000000 100%);
  }
  header {
      padding: 1rem;
  }
  .header_row {
      flex-direction: column;
      align-items: stretch;
  }
  .logo {
      order: 2;
      text-align: center;
      font-size: 1.5rem;
  }
  .naslov {
      order: 3;
      font-size: 1.1rem;
  }
  .izbornik {
      order: 1;
      width: 100%;
  }
  .izbornik ul {
      justify-content: center;
  }
  .izbornik ul li {
      flex: 1;
      text-align: center;
      min-width: 80px;
  }
  main {
      padding: 1.5rem 1rem;
  }
  article {
      min-width: 100%;
  }
}
/* TABLETI - 900px do 1200px */
@media only screen and (min-width: 900px) and (max-width: 1200px) {
  body {
      background: linear-gradient(135deg, #8d220f 0%, #00d2ff 100%);
  }
  .container {
      max-width: 95%;
  }
  .logo {
      order: 1;
      flex: 0 0 auto;
  }
  .naslov {
      order: 2;
      flex: 1;
  }
  .izbornik {
      order: 3;
      flex: 0 0 auto;
  }
  .izbornik ul li {
      padding: 0.5rem 1rem;
      font-size: 0.9rem;
  }
  article {
      flex-basis: calc(50% - 1rem);
      min-width: 280px;
  }
}
/* DESKTOP - iznad 1200px */
@media only screen and (min-width: 1201px) {
  article {
      flex-basis: calc(33.333% - 1.5rem);
  }
}