:root {
  /* Svetle boje (default) */
  --bg-body: #f0f2f5;
  --bg-app: #ffffff;
  --text-main: #1a1a1a;
  --text-muted: #495057;
  --bg-display: #f8f9fa;
  --border-color: #dee2e6;
}

[data-theme="dark"] {
  /* Tamne boje */
  --bg-body: #121212;
  --bg-app: #1e1e1e;
  --text-main: #ffffff;
  --text-muted: #b0b0b0;
  --bg-display: #2d2d2d;
  --border-color: #404040;
}
/* Osnovni reset i fontovi */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-body);
  color: var(--text-main);
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

/* Kontejner aplikacije koji imitira mobilni ekran */
.app-container {
  background: var(--bg-app);
  color: var(--text-main);
  width: 100%;
  max-width: 400px;
  padding: 2rem;
  border: 1px solid #333; /* Diskretna ivica */
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); /* Duboka senka za "floating" efekat */
  text-align: center;
}

h1 {
  color: var(--text-main);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

/* Area gde se prikazuje poruka */
#display-area {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 16px;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  border: 1px dashed #dee2e6;
}

#poruka {
  font-size: 1.1rem;
  color: #495057;
  font-style: italic;
  line-height: 1.5;
}

/* Grupa za unos */
.input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 1rem;
}

input[type="text"] {
  flex: 1;
  padding: 12px;
  border: 2px solid #e9ecef;
  border-radius: 12px;
  outline: none;
  transition: border-color 0.3s;
}

input[type="text"]:focus {
  border-color: #007bff;
}

/* Dugmići */
button {
  cursor: pointer;
  border: none;
  font-weight: 600;
  transition:
    transform 0.1s,
    opacity 0.2s;
}

button:active {
  transform: scale(0.95);
}

#add-btn {
  background-color: #28a745;
  color: white;
  padding: 12px 20px;
  border-radius: 12px;
}

#generate-btn {
  background-color: #007bff;
  color: white;
  width: 100%;
  padding: 15px;
  border-radius: 12px;
  font-size: 1rem;
  margin-top: 10px;
}

/* Sakrivanje labele za ekran, ali ostavljanje za screen readere */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.icon-only-btn {
  background: none; /* Uklanja sivu pozadinu dugmeta */
  border: none;
  font-size: 1.5rem; /* Povećava ikonu */
  cursor: pointer;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
  outline: none;
}

.icon-only-btn:hover {
  transform: scale(1.1); /* Blago povećanje kad se pređe mišem */
}

.icon-only-btn:active {
  transform: scale(0.9); /* Efekat pritiska */
}
/* Responsive dizajn za manje ekrane */
@media (max-width: 480px) {
  .app-container {
    padding: 1.5rem;
  }

  #display-area {
    min-height: 100px;
  }

  button {
    font-size: 0.9rem;
  }
}