* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Arial", sans-serif;
}

body {
  margin: 0;
  font-family: "Arial", sans-serif;
  line-height: 1.6;
  background-image: linear-gradient(100deg, #575656, #062e3f);
  color: #ffdfdb;
  transition: 0.3s linear;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  box-sizing: border-box;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  max-width: 28rem;
  width: 100%;
  background-color: white;
  border-radius: 0.75rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.converter-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.converter-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1f2937;
}

.help-button {
  color: #2563eb;
  background: none;
  border: none;
  cursor: pointer;
}

.help-button:hover {
  color: #1e40af;
}

.help-button svg {
  height: 1.5rem;
  width: 1.5rem;
}

.help-panel {
  width: 100%;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background-color: #eff6ff;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  display: none;
}

.help-panel.show {
  display: block;
}

.help-panel h3 {
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.help-panel ul {
  list-style-type: disc;
  list-style-position: inside;
}

.help-panel li {
  margin-top: 0.25rem;
}

.converter-panel {
  width: 100%;
  margin-bottom: 1.5rem;
}

.mode-buttons {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.direction-buttons {
  display: flex;
  gap: 1rem;
}

.button {
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
  transition: background-color 0.3s;
}

.button.active {
  background-color: #2563eb;
  color: white;
}

.button.inactive {
  background-color: #e5e7eb;
  color: #1f2937;
}

.button.auto-detect {
  background-color: #e5e7eb;
  color: #1f2937;
}

.button.auto-detect.active {
  background-color: #16a34a;
  color: white;
}

.input-section {
  margin-bottom: 1rem;
}

.input-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: #374151;
  margin-bottom: 0.25rem;
}

.input-wrapper {
  display: flex;
  gap: 0.5rem;
}

.input-field {
  flex-grow: 1;
  padding: 0.5rem;
  border: 1px solid #d1d5db;
  border-radius: 0.375rem;
  outline: none;
}

.input-field:focus {
  outline: none;
  /* ring: 2px solid #2563eb; */
  border-color: #2563eb;
}

.convert-button {
  background-color: #2563eb;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s;
}

.convert-button:hover {
  background-color: #1d4ed8;
}

.error-message {
  margin-top: 1rem;
  padding: 0.5rem;
  background-color: #fee2e2;
  border: 1px solid #f87171;
  color: #b91c1c;
  border-radius: 0.375rem;
  display: none;
}

.result-section {
  margin-top: 1rem;
  display: none;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.25rem;
}

.result-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: #374151;
}

.copy-button {
  color: #2563eb;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
}

.copy-button:hover {
  color: #1e40af;
}

.copy-button svg {
  height: 1rem;
  width: 1rem;
}

.result-display {
  padding: 1rem;
  background-color: #f3f4f6;
  border-radius: 0.375rem;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 600;
  word-break: break-all;
  color: #1f2937;
}

.reference-panel {
  width: 100%;
  padding: 1rem;
  background-color: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 0.375rem;
  margin-bottom: 1.5rem;
}

.reference-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: #374151;
  margin-bottom: 0.5rem;
}

.reference-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  font-size: 0.875rem;
  color: #374151;
}

@media (min-width: 640px) {
  .reference-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.history-section {
  width: 100%;
  border-top: 1px solid #e5e7eb;
  padding-top: 1.5rem;
  display: none;
  color: #1f2937;
}

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

.history-title {
  font-size: 1.125rem;
  font-weight: 500;
  color: #1f2937;
}

.clear-history-button {
  font-size: 0.875rem;
  color: #ef4444;
  background: none;
  border: none;
  cursor: pointer;
}

.clear-history-button:hover {
  color: #b91c1c;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 15rem;
  overflow-y: auto;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem;
  background-color: #f9fafb;
  border-radius: 0.375rem;
  cursor: pointer;
}

.history-item:hover {
  background-color: #f3f4f6;
}

.history-conversion {
  font-weight: 500;
  color: #1f2937;
}

.history-arrow {
  margin: 0 0.5rem;
  color: #9ca3af;
}

.history-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.history-type {
  font-size: 0.75rem;
  color: #6b7280;
  display: none;
}

.history-time {
  font-size: 0.75rem;
  color: #6b7280;
}

@media (min-width: 640px) {
  .history-type {
    display: inline;
  }
}

/* Page Header Styling (from Calculator) */
.page-header {
  text-align: center;
  margin-bottom: 20px;
}

.logo {
  margin: 10px;
  color: #ffdfdb;
  font-size: 25px;
  text-decoration: none;
  font-weight: bolder;
  border: 2px solid #ffdfdb;
  border-radius: 20px;
  padding: 7px;
  transition: all 1s ease;
  -webkit-transition: all 1s ease;
  -moz-transition: all 1s ease;
  -ms-transition: all 1s ease;
  -o-transition: all 1s ease;
}

.logo:hover {
  background-color: #ffdfdb;
  color: rgb(0, 0, 0);
  border: none;
  padding: 9px;
  box-shadow: 0 0 10px white;
}

.page-header h1 {
  font-size: 2rem;
  color: #ffdfdb;
}

.page-header p {
  font-size: 1rem;
  color: white;
}

/* Footer Styling (from Calculator) */
.footer {
  margin-top: 20px;
  text-align: center;
  font-size: 0.9rem;
  color: #7f8c8d;
}

.view-my-p {
  position: relative;
  color: #ffdfdb;
  text-decoration: none;
}

.view-my-p::after {
  content: "";
  position: absolute;
  width: 0;
  background-color: #ffdfdb;
  height: 2px;
  bottom: 0;
  left: 0;
  transition: width 1s ease;
  -webkit-transition: width 1s ease;
  -moz-transition: width 1s ease;
  -ms-transition: width 1s ease;
  -o-transition: width 1s ease;
}

.view-my-p:hover::after {
  width: 100%;
}