/* ======================================= */
/* UNIT PREFIX CONVERTER - MODERN UNIFIED */
/* ======================================= */

/* ===== COLOR DEFINITIONS ===== */
/* Dark mode is default, light mode overrides via :root.light-mode */

.prefix-converter-card {
  /* Dark mode colors */
  --prefix-bg-card: var(--secondary-bg);
  --prefix-bg-input: var(--primary-bg);
  --prefix-bg-form: var(--secondary-bg);
  --prefix-bg-output: var(--primary-bg);
  --prefix-border: var(--border-color);
  --prefix-text: var(--text-primary);
  --prefix-text-secondary: var(--text-secondary);
  --prefix-button-bg: var(--link-color);
  --prefix-button-text: var(--text-primary);
  --prefix-button-border: var(--border-color);
  --prefix-button-hover-border: var(--link-color);
  --prefix-button-hover-shadow: rgba(88, 166, 255, 0.2);
  --prefix-primary-btn-bg: var(--link-color);
  --prefix-primary-btn-border: var(--link-color);
  --prefix-primary-btn-shadow: rgba(88, 166, 255, 0.3);
  --prefix-focus-border: var(--link-color);
  --prefix-focus-shadow: rgba(88, 166, 255, 0.1);
  --prefix-accent-blue: var(--link-color);
}

/* Light mode color overrides */
:root.light-mode .prefix-converter-card {
  --prefix-bg-card: #ffffff;
  --prefix-bg-input: #ffffff;
  --prefix-bg-form: #f9fafb;
  --prefix-bg-output: #ffffff;
  --prefix-border: #d0d7de;
  --prefix-text: #24292f;
  --prefix-text-secondary: #57606a;
  --prefix-button-bg: #ffffff;
  --prefix-button-text: #24292f;
  --prefix-button-border: #d0d7de;
  --prefix-button-hover-border: #0969da;
  --prefix-button-hover-shadow: rgba(9, 105, 218, 0.15);
  --prefix-primary-btn-bg: #0969da;
  --prefix-primary-btn-border: #0969da;
  --prefix-primary-btn-shadow: rgba(9, 105, 218, 0.2);
  --prefix-focus-border: #0969da;
  --prefix-focus-shadow: rgba(9, 105, 218, 0.1);
  --prefix-accent-blue: #0969da;
}

/* ===== MAIN CARD ===== */
.prefix-converter-card {
  max-width: 100%;
  margin: 0 auto;
  padding: 1.25rem;
  background: var(--prefix-bg-card);
  border: 1px solid var(--prefix-border);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  color: var(--prefix-text);
  position: relative;
  overflow: hidden;
}

/* Gradient top border */
.prefix-converter-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #9333ea, #3b82f6, #9333ea);
  background-size: 200% 100%;
  animation: prefixGradientShift 3s ease infinite;
}

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

/* ===== HEADER ===== */
.prefix-converter-card h1 {
  color: var(--prefix-text);
  font-size: 1.6rem;
  margin-bottom: 1rem;
  text-align: center;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.prefix-converter-card-subtitle {
  text-align: center;
  color: var(--prefix-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
  font-weight: 400;
}

/* ===== LAYOUT ===== */
.prefix-converter-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1rem;
}

@media (min-width: 992px) {
  .prefix-converter-layout {
    grid-template-columns: 500px 1fr;
  }
}

.prefix-left-column {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.prefix-right-column {
  display: flex;
  flex-direction: column;
}

/* ===== INPUT SECTION ===== */
.prefix-input-section {
  background: var(--prefix-bg-form);
  border: 1px solid var(--prefix-border);
  border-radius: 12px;
  padding: 1rem;
  transition: all 0.3s ease;
}

.prefix-input-section:hover {
  border-color: var(--prefix-button-hover-border);
}

.prefix-input-section label {
  display: block;
  color: var(--prefix-text);
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.prefix-input-group {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.prefix-input-group input[type="number"] {
  flex: 1;
  padding: 0.6rem 0.8rem;
  background: var(--prefix-bg-input);
  color: var(--prefix-text);
  border: 2px solid var(--prefix-border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: "Courier New", "Roboto Mono", monospace;
  transition: all 0.2s ease;
  box-sizing: border-box;
}

.prefix-input-group input[type="number"]:focus {
  outline: none;
  border-color: var(--prefix-focus-border);
  box-shadow: 0 0 0 3px var(--prefix-focus-shadow);
}

.prefix-input-group input[type="number"]::-webkit-inner-spin-button,
.prefix-input-group input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.prefix-input-group input[type="number"] {
  -moz-appearance: textfield;
}

.prefix-input-group select {
  background: var(--prefix-primary-btn-bg);
  border: 2px solid var(--prefix-primary-btn-border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 180px;
}

.prefix-input-group select:hover {
  transform: translateY(-1px);
  opacity: 0.9;
}

.prefix-input-group select:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--prefix-focus-shadow);
}

.prefix-original-display {
  background: var(--prefix-bg-input);
  border: 2px solid var(--prefix-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.prefix-label {
  color: var(--prefix-text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
}

.prefix-original-value {
  color: var(--prefix-accent-blue);
  font-size: 0.95rem;
  font-weight: 700;
  font-family: "Courier New", "Roboto Mono", monospace;
}

/* ===== RESULTS SECTION ===== */
.prefix-results-section {
  background: var(--prefix-bg-form);
  border: 1px solid var(--prefix-border);
  border-radius: 12px;
  padding: 1rem;
  transition: all 0.3s ease;
}

.prefix-results-section:hover {
  border-color: var(--prefix-button-hover-border);
}

.prefix-results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.prefix-results-header h3 {
  color: var(--prefix-text);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}

.prefix-filter-btn {
  background: var(--prefix-button-bg);
  border: 2px solid var(--prefix-button-border);
  border-radius: 8px;
  padding: 0.5rem 0.875rem;
  color: var(--prefix-button-text);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.prefix-filter-btn:hover {
  border-color: var(--prefix-button-hover-border);
  background: var(--prefix-bg-card);
  transform: translateY(-1px);
}

.prefix-filter-btn:active {
  transform: translateY(0);
}

.prefix-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
}

.prefix-result-item {
  background: var(--prefix-bg-input);
  border: 2px solid var(--prefix-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.prefix-result-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--prefix-focus-shadow), transparent);
  transition: left 0.5s ease;
}

.prefix-result-item:hover::before {
  left: 100%;
}

.prefix-result-item:hover {
  border-color: var(--prefix-focus-border);
  transform: translateX(4px);
}

.prefix-result-item.is-original {
  border-color: var(--prefix-accent-blue);
  background: var(--prefix-focus-shadow);
}

.prefix-result-item.is-hidden {
  display: none;
}

.prefix-result-content {
  flex: 1;
  min-width: 0;
}

.prefix-result-prefix {
  color: var(--prefix-text-secondary);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.25rem;
}

.prefix-result-value {
  color: var(--prefix-text);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: "Courier New", "Roboto Mono", monospace;
  word-break: break-all;
}

.prefix-result-item.is-original .prefix-result-value {
  color: var(--prefix-accent-blue);
}

.prefix-copy-btn {
  background: transparent;
  border: none;
  color: var(--prefix-text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  flex-shrink: 0;
  transition: all 0.2s ease;
  border-radius: 6px;
}

.prefix-copy-btn:hover {
  color: var(--prefix-focus-border);
  background: var(--prefix-focus-shadow);
  transform: scale(1.1);
}

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

/* ===== INFO SECTION ===== */
.prefix-info-section {
  background: var(--prefix-bg-form);
  border: 1px solid var(--prefix-border);
  border-radius: 12px;
  overflow: hidden;
}

.prefix-info-toggle {
  width: 100%;
  background: transparent;
  border: none;
  padding: 1rem;
  color: var(--prefix-text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s ease;
}

.prefix-info-toggle:hover {
  background: var(--prefix-focus-shadow);
}

.prefix-toggle-icon {
  transition: transform 0.3s ease;
}

.prefix-info-toggle.is-open .prefix-toggle-icon {
  transform: rotate(180deg);
}

.prefix-info-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.prefix-info-content.is-open {
  max-height: 1000px;
}

.prefix-info-grid {
  padding: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.75rem;
}

.prefix-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--prefix-bg-input);
  border-radius: 8px;
  border: 1px solid var(--prefix-border);
  transition: all 0.2s ease;
}

.prefix-info-item:hover {
  border-color: var(--prefix-focus-border);
  transform: translateX(4px);
}

.prefix-info-badge {
  background: var(--prefix-primary-btn-bg);
  color: white;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  min-width: 36px;
  text-align: center;
  flex-shrink: 0;
  font-family: "Courier New", "Roboto Mono", monospace;
}

.prefix-info-item div {
  flex: 1;
}

.prefix-info-item strong {
  display: block;
  color: var(--prefix-text);
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

.prefix-info-item p {
  color: var(--prefix-text-secondary);
  font-size: 0.75rem;
  line-height: 1.4;
  margin: 0;
}

/* ===== FEEDBACK ===== */
.prefix-feedback {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.875rem;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
  pointer-events: none;
  z-index: 1000;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 991px) {
  .prefix-converter-card {
    padding: 1rem;
  }

  .prefix-converter-card h1 {
    font-size: 1.5rem;
  }

  .prefix-converter-layout {
    grid-template-columns: 1fr;
  }

  .prefix-input-group {
    flex-direction: column;
  }

  .prefix-input-group select {
    min-width: 100%;
  }

  .prefix-results-grid {
    grid-template-columns: 1fr;
  }

  .prefix-info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .prefix-feedback {
    bottom: 20px;
    right: 20px;
    left: 20px;
  }

  .prefix-original-display {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .prefix-results-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .prefix-filter-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .prefix-converter-card {
    padding: 1rem;
    border-radius: 12px;
  }

  .prefix-converter-card h1 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
  }

  .prefix-converter-card-subtitle {
    font-size: 0.85rem;
  }

  .prefix-input-section,
  .prefix-results-section,
  .prefix-info-section {
    padding: 1rem;
  }
}