.converter-card {
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
  position: relative;
  background: var(--primary-color);
  padding: 4px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--card-shadow);
}

.converter-card-content {
  background: var(--background-color-card);
  border-radius: 8px;
  padding: 2rem;
  padding-top: 4rem;
}

.converter-header {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  width: max-content;
  padding: 0.8rem 1.6rem;
  background: var(--header-bg-gradient);
  color: var(--text-color-light);
  border-radius: var(--border-radius-md);
  box-shadow: 0 5px 20px rgba(0, 91, 234, 0.25);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0;
}

.converter-header i {
  font-size: 1.4rem;
  color: var(--text-color-light);
}

#converter-form {
  text-align: center;
}

.input-group {
  display: flex;
  align-items: center;
  background: var(--background-color-input-group);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-md);
  margin-top: 1rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--primary-color-light);
}

.input-group i {
  color: var(--primary-color);
  font-size: 1.15rem;
  margin-right: 0.75rem;
}

.input-group input[type="url"] {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 1rem;
  color: var(--text-color-primary);
}

.input-group input[type="url"]::placeholder {
  color: #8899aa;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 576px) {
  .options-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.option-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.option-item label {
  margin-bottom: 0.35rem;
  font-weight: 600;
  color: var(--text-color-primary);
  font-size: 0.9rem;
}

.select-wrapper {
  display: flex;
  align-items: center;
  background: var(--background-color-input-group);
  padding: 0.6rem 0.9rem;
  border-radius: var(--border-radius-md);
  width: 100%;
  border: 1px solid var(--primary-color-light);
}

.select-wrapper .select-icon {
  color: var(--primary-color);
  font-size: 1.1rem;
  margin-right: 0.6rem;
}

.option-item select {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.95rem;
  color: var(--text-color-primary);
  cursor: pointer;
  width: 100%;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.convert-btn {
  width: 100%;
  padding: 0.85rem 1rem;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-color-dark));
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-color-light);
  box-shadow: 0 2px 5px rgba(0,91,234,0.3);
}

.convert-btn:hover,
.convert-btn:focus {
  background: linear-gradient(90deg, var(--primary-color-dark), var(--primary-color));
  box-shadow: 0 4px 8px rgba(0,91,234,0.4);
  transform: translateY(-2px);
  outline: none;
}

.convert-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 5px rgba(0,91,234,0.3);
}

.convert-btn .icon-submit,
.convert-btn .icon-loading {
  margin-left: 0.5em;
}

.convert-btn .icon-loading {
  display: none;
}

@media (max-width: 600px) {
  .converter-card-content {
    padding: 1.5rem 1rem;
    padding-top: 3.5rem;
  }
  .converter-header {
    font-size: 1.15rem;
    padding: 0.7rem 1.2rem;
  }
  .converter-header i {
    font-size: 1.2rem;
  }
  .input-group {
    padding: 0.65rem 0.85rem;
  }
  .input-group input[type="url"] {
    font-size: 1rem;
  }
  .option-item label { font-size: 0.85rem; }
  .select-wrapper { padding: 0.5rem 0.75rem; }
  .select-wrapper .select-icon { font-size: 1rem; }
  .option-item select {
    font-size: 1rem;
  }
  .convert-btn { padding: 0.75rem; font-size: 1rem; }
}