body {
  font-family: Arial, sans-serif;
  background: #eef1f5;
  margin: 0;
  padding: 20px;
  color: #111827;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  font-size: 32px;
  margin-bottom: 10px;
  font-weight: 700;
}

h2 {
  text-align: center;
  margin-top: 10px;
  font-weight: 600;
}

/* GRID ZA MODELE */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 20px;
}

/* --- 1 kartica po redu, kvadratnog oblika --- */
.grid-categories {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 700px;
  margin: 0 auto;
}

.grid-categories .card {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 400px;
}

.grid-categories .card img {
  width: 100%;
  height: 330px;
  object-fit: cover;
  border-radius: 8px;
}

.card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 8px;
}

/* --- MOBITEL --- */
@media (max-width: 900px) {

  .grid-categories .card {
    min-height: 320px;
  }

  .grid-categories .card img {
    height: 260px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 20px;
  }

  .card h3 {
    font-size: 20px;
  }
}


.card {
  background: white;
  border-radius: 12px;
  padding: 15px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  text-align: center;
  cursor: pointer;
  transition: 0.2s;
}

.card:hover {
  transform: translateY(-4px);
}

.card.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.input-group {
  margin: 15px 0;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 5px;
}

input, select, textarea {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-size: 15px;
}

button {
  width: 100%;
  padding: 14px;
  margin-top: 15px;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  transition: 0.2s;
}

button:hover {
  background: #3b82f6;
}

.secondary-btn {
  background: #6b7280;
}

.secondary-btn:hover {
  background: #4b5563;
}

.result {
  background: white;
  padding: 20px;
  border-radius: 12px;
  margin-top: 20px;
  white-space: pre-wrap;
  border: 1px solid #ddd;
  font-size: 15px;
  line-height: 1.5;
}

.hidden {
  display: none;
}

/* VRATA TOGGLE GUMBI */
.vrata-chk {
  display: none;
}

.vrata-btn {
  display: block;
  width: 100%;
  padding: 12px 16px;
  background: #f3f4f6;
  border: 2px solid #d1d5db;
  border-radius: 10px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: #374151;
  text-align: left;
  transition: 0.2s;
  box-sizing: border-box;
}

.vrata-btn::before {
  content: "＋ ";
  color: #9ca3af;
  font-weight: 700;
}

.vrata-btn:hover {
  border-color: #2563eb;
  color: #2563eb;
  background: #eff6ff;
}

.vrata-chk:checked + .vrata-btn {
  background: #2563eb;
  border-color: #2563eb;
  color: white;
}

.vrata-chk:checked + .vrata-btn::before {
  content: "✓ ";
  color: white;
}