/* =======================================
   PREFIX CONVERTER STYLING
   ======================================= */

.prefix-card {
  max-width: 500px;
  margin: 30px auto;
  padding: 35px;
  background: linear-gradient(
    145deg,
    var(--card-bg) 0%,
    var(--secondary-bg) 100%
  );
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
  color: var(--text-color);
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

.prefix-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--accent-purple),
    var(--accent-blue),
    var(--accent-purple)
  );
  background-size: 200% 100%;
  animation: prefixGradientShift 3s ease infinite;
}

@keyframes prefixGradientShift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.prefix-card h1 {
  color: var(--text-primary);
  font-size: 2rem;
  margin-bottom: 8px;
  text-align: center;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.prefix-card .intro {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 25px;
  font-weight: 400;
  line-height: 1.4;
}

.prefix-card .converter-section label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 0.95rem;
}

/* Input Wrapper voor input en pijltjes */
.prefix-converter-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--overlay-dark);
  border: 2px solid var(--border-dark);
  border-radius: 12px;
  overflow: hidden;
  height: 56px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  margin-bottom: 20px;
}

.prefix-converter-input-wrapper:focus-within {
  border-color: var(--accent-purple);
  box-shadow: 0 0 20px rgba(147, 51, 234, 0.2);
}

.prefix-converter-input-wrapper input[type="number"] {
  flex-grow: 1;
  border: none;
  background: transparent;
  text-align: center;
  font-size: 1.1rem;
  padding: 0 15px;
  height: 100%;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0;
}

.prefix-converter-input-wrapper input[type="number"]:focus {
  outline: none;
}

/* Verberg spin buttons voor nummer input */
.prefix-converter-input-wrapper input[type="number"]::-webkit-inner-spin-button,
.prefix-converter-input-wrapper input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.prefix-converter-input-wrapper input[type="number"] {
  -moz-appearance: textfield;
}

/* Pijltjes controles */
.prefix-converter-arrow-controls {
  display: flex;
  flex-direction: column;
  height: 100%;
  border-left: 1px solid var(--border-dark);
}

.prefix-converter-arrow-btn {
  flex: 1;
  width: 50px;
  background: var(--overlay-medium);
  color: var(--text-primary);
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  position: relative;
}

.prefix-converter-arrow-btn.up {
  border-bottom: 1px solid var(--border-dark);
}

.prefix-converter-arrow-btn:hover {
  background: var(--accent-purple);
  color: white;
}

.prefix-converter-arrow-btn:active {
  transform: scale(0.95);
}

.prefix-card .unit-selects {
  display: flex;
  align-items: flex-end;
  gap: 15px;
  margin-bottom: 0;
}

.prefix-card select {
  flex: 1;
  padding: 14px 16px;
  border-radius: 10px;
  border: 2px solid var(--border-dark);
  background: var(--overlay-dark);
  color: var(--text-color);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
  box-sizing: border-box;
  font-weight: 500;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='292.4' height='292.4'%3E%3Cpath fill='%239333ea' d='M287 69.4a17.6 17.6 0 0 0-13 5.4L146.2 202.7 18.6 74.8c-6.7-6.7-17.6-6.7-24.3 0s-6.7 17.6 0 24.3L134.5 230a17.6 17.6 0 0%0A0 24.3L273.6 99.1c6.7-6.7 6.7-17.6 0-24.3a17.6 17.6 0 0 0-12.9-5.4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
}

.prefix-card select:focus {
  outline: none;
  border-color: var(--accent-purple);
  box-shadow: 0 0 20px rgba(147, 51, 234, 0.2);
}

.prefix-card .arrow {
  font-size: 1.8rem;
  color: var(--accent-purple);
  flex-shrink: 0;
  padding-bottom: 0px;
  animation: prefixArrowPulse 2s ease-in-out infinite;
  cursor: default;
}

@keyframes prefixArrowPulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.prefix-card .output-box {
  background: var(--overlay-dark);
  border: 2px solid var(--border-dark);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: "Courier New", "Roboto Mono", monospace;
  font-size: 1.05rem;
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 600;
  text-align: center;
  word-break: break-word;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  margin-top: 20px;
}

.prefix-card .output-box:hover {
  border-color: var(--accent-purple);
  box-shadow: 0 0 20px rgba(147, 51, 234, 0.2);
}

.prefix-card .output-box strong {
  color: var(--accent-purple);
  font-weight: 700;
}

.prefix-card .feedback {
  background: linear-gradient(135deg, var(--strength-strong) 0%, #059669 100%);
  color: white;
  padding: 12px;
  border-radius: 10px;
  text-align: center;
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  margin-top: 20px;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.prefix-card .feedback.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Media queries voor responsiviteit */
@media (max-width: 768px) {
  .prefix-card {
    padding: 25px 20px;
    border-radius: 16px;
    margin: 20px auto;
  }

  .prefix-card h1 {
    font-size: 1.6rem;
  }

  .prefix-card .intro {
    font-size: 0.85rem;
    margin-bottom: 20px;
  }

  .prefix-converter-input-wrapper {
    height: 50px;
  }

  .prefix-converter-input-wrapper input[type="number"] {
    font-size: 1rem;
    padding: 12px 14px;
  }

  .prefix-converter-arrow-btn {
    width: 45px;
    font-size: 1.2rem;
  }

  .prefix-card select {
    padding: 12px 14px;
    font-size: 0.95rem;
  }

  .prefix-card .unit-selects {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .prefix-card .arrow {
    transform: rotate(90deg);
    padding: 0;
    margin: 8px auto;
  }

  .prefix-card .output-box {
    padding: 16px;
    min-height: 70px;
    font-size: 1rem;
  }

  .prefix-card .feedback {
    padding: 10px;
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .prefix-card {
    padding: 20px 15px;
    border-radius: 12px;
  }

  .prefix-card h1 {
    font-size: 1.4rem;
  }

  .prefix-card .intro {
    font-size: 0.8rem;
  }

  .prefix-converter-input-wrapper {
    height: 45px;
  }

  .prefix-converter-input-wrapper input[type="number"] {
    font-size: 0.95rem;
    padding: 10px 12px;
  }

  .prefix-converter-arrow-btn {
    width: 40px;
    font-size: 1.1rem;
  }

  .prefix-card select {
    padding: 10px 12px;
    font-size: 0.9rem;
  }

  .prefix-card .output-box {
    padding: 14px;
    min-height: 60px;
    font-size: 0.9rem;
  }
}