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

body {
  font-family: 'Bahnschrift', sans-serif;
  font-size: 12px;
  line-height: 1.6;
  background-color: #ffffff;
  color: #000000;
  padding: 20px;
}

/* HEADER */
.header {
  padding: 25px 20px;
  text-align: center;
  background-color: #ffffff;
  border-radius: 12px;
  font-size: 2em;
  font-weight: bold;
  color: #000000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

/* NAVIGATION BAR */
.topnav {
  overflow: hidden;
  background-color: #f0f0f0;
  border-radius: 10px;
  margin: 20px 0;
}

.topnav a {
  float: left;
  display: block;
  color: #000000;
  text-align: center;
  padding: 14px 20px;
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: all 0.3s ease;
}

.topnav a:hover {
  background-color: #e0e0e0;
  color: #000000;
}

/* COLUMNS & CARDS MODERN */
.leftcolumn,
.rightcolumn,
.card,
.fakeimg {
  background: linear-gradient(to bottom, #ffffff, #f9f9f9);
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
  padding: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.leftcolumn:hover,
.rightcolumn:hover,
.card:hover,
.fakeimg:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0,0,0,0.10);
}

/* LEFT COLUMN TREE SABIJENO */
.leftcolumn {
  float: left;
  width: 20%;
  font-size: 13px;
  color: #000000;
}

.leftcolumn h3 {
  margin-left: 0;
  margin-bottom: 10px;
  font-weight: 600;
  color: #000000;
}

.leftcolumn ul {
  list-style: none;
  padding-left: 15px; /* manji odmak glavnih grana */
  margin: 0;
}

.leftcolumn ul li {
  margin-bottom: 2px; /* minimalni razmak između stavki */
  padding-left: 0;
}

.leftcolumn ul li ul {
  padding-left: 12px; /* manji indent za pod-grane */
  margin: 0;
}

.leftcolumn ul li ul li {
  margin-bottom: 1px; /* vrlo mali razmak pod-stavki */
}

.leftcolumn ul li a {
  display: block;
  padding: 4px 6px; /* manji padding za sabijen izgled */
  text-decoration: none;
  color: #000000;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}

.leftcolumn ul li a:hover {
  background-color: #f0f0f0;
  color: #000000;
}

/* RIGHT COLUMN */
.rightcolumn {
  float: left;
  width: 75%;
  margin-left: 3%;
  min-width: 0;
  color: #000000;
}

/* FAKE IMAGE */
.fakeimg {
  width: 100%;
  margin-bottom: 15px;
}

/* CARD */
.card {
  margin-top: 20px;
  font-size: 13px;
  color: #000000;
}

/* Clear floats */
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* FOOTER */
.footer {
  padding: 20px;
  text-align: left;
  background: linear-gradient(to bottom, #ffffff, #f9f9f9);
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
  margin-top: 40px;
  color: #000000;
  transition: box-shadow 0.2s ease;
}

.footer:hover {
  box-shadow: 0 8px 22px rgba(0,0,0,0.10);
}

/* RESPONSIVE */
@media screen and (max-width: 800px) {
  .leftcolumn, .rightcolumn {
    width: 100%;
    margin: 0 0 20px 0;
  }
}

@media screen and (max-width: 400px) {
  .topnav a {
    float: none;
    width: 100%;
  }
}