/* ===== Import Inter font ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ===== Design tokens ===== */
.convertikon {
  --conv-primary: #1a73e8;
  --conv-primary-hover: #1557b0;
  --conv-bg: #ffffff;
  --conv-sidebar-bg: #f8f9fa;
  --conv-border: #dadce0;
  --conv-text: #202124;
  --conv-text-light: #5f6368;
  --conv-selected-bg: #e8f0fe;
  --conv-selected-border: #1a73e8;
  --conv-radius: 8px;
  --conv-radius-small: 4px;
  --conv-shadow: 0 2px 8px rgba(0,0,0,0.08);
  --conv-font: 'Inter', sans-serif;
  --conv-font-size-sm: 0.875rem;
  --conv-font-size: 1rem;
  --conv-font-size-lg: 2.5rem;
  --conv-gap: 1rem;
  --conv-padding: 0.5rem 0.75rem;
}

/* ===== Overall card (polished) – single grid layout ===== */
.convertikon {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: var(--conv-gap);
  padding: 1.5rem;
  background: var(--conv-bg);
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  font-family: var(--conv-font);
  color: var(--conv-text);
}

/* ===== Sidebar (clearer separation) ===== */
.convertikon__sidebar {
  display: flex;
  flex-direction: column;
  background: var(--conv-sidebar-bg);
  border-radius: var(--conv-radius);
  overflow-y: auto;
  border-right: 1px solid #e0e0e0;
  padding-right: 1rem;
  margin-right: 1rem;
}
.convertikon__category-btn {
  display: block;
  text-align: left;
  padding: var(--conv-padding);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: var(--conv-font-size-sm);
  white-space: nowrap;
  overflow: visible;
  text-overflow: clip;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.convertikon__category-btn[aria-pressed="true"] {
  background: var(--conv-primary);
  color: #ffffff;
  font-weight: 600;
  border-radius: var(--conv-radius-small);
  box-shadow: 0 1px 3px rgba(26,115,232,0.3);
}

/* ===== Main area ===== */
.convertikon__main {
  min-width: 0;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--conv-gap);
}

/* ===== Unit tabs – pill‑shaped tabs ===== */
.convertikon__unit-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: none;
  padding-bottom: 0;
}
.convertikon__unit-btn {
  background: #f1f3f4;
  border: 1px solid #dadce0;
  border-radius: 20px;
  padding: 0.35rem 1rem;
  font-size: 0.95rem;
  color: #5f6368;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.convertikon__unit-btn:hover {
  background: #e8eaed;
  color: #202124;
}
.convertikon__unit-btn[aria-pressed="true"] {
  background: var(--conv-primary);
  color: white;
  border-color: var(--conv-primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(26,115,232,0.3);
}

/* ===== I/O area ===== */
.convertikon__io {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.convertikon__io-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* From input – clear visible box */
.convertikon__from-input {
  width: 140px;
  padding: 0.6rem 0.8rem;
  border: 1px solid #dadce0;
  border-radius: 8px;
  font-size: 1rem;
  background: #ffffff;
  color: #202124;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.convertikon__from-input:focus {
  border-color: #1a73e8;
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}

/* To field – same box styling */
.convertikon__to-field {
  display: inline-flex;
  align-items: center;
  width: 140px;
  padding: 0.6rem 0.8rem;
  border: 1px solid #dadce0;
  border-radius: 8px;
  background: #ffffff;
  min-height: 2.8rem;
  box-sizing: border-box;
  color: #202124;
  font-size: 1rem;
}
.convertikon__to-label {
  font-size: var(--conv-font-size-sm);
  margin-left: 0.25rem;
}
.convertikon__to-display {
  font-size: 1rem;
  color: var(--conv-text);
  min-width: 120px;
  width: auto;
  max-width: none;
  white-space: nowrap;
}

/* Placeholder style for to‑field */
.convertikon__to-field.has-placeholder .convertikon__to-display {
  color: var(--conv-text-light);
}

/* Dynamic conversion label */
.convertikon__conversion-label {
  font-size: calc(var(--conv-font-size) + 2px);
  color: #000;
  text-align: left;
  font-weight: bold;
  min-height: 1.2rem;
  margin-top: 0.25rem;
}

/* Swap button – blue circle with white arrow */
.convertikon__swap-btn {
  background: #1a73e8;
  border: 2px solid #1a73e8;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  font-size: 1.3rem;
  cursor: pointer;
  color: white;
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin: 0;
  line-height: 1;
  transition: opacity 0.2s, transform 0.15s;
  flex-shrink: 0;
  box-sizing: border-box;
}
.convertikon__swap-btn:hover {
  transform: scale(1.05);
}
.convertikon__swap-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

/* ===== Result banner (bigger, more prominent) ===== */
.convertikon__result-banner {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 2.2rem;
  font-weight: 700;
  justify-content: center;
  padding: 1.2rem;
  background: #fafafa;
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  min-height: 3rem;
  margin-top: 0.5rem;
}
.convertikon__result-label {
  font-size: inherit;
  font-weight: inherit;
  color: var(--conv-text-light);
  margin-right: 0.25rem;
}
.convertikon__result-value {
  /* inherits large bold style */
}

/* ===== Error message ===== */
.convertikon__error {
  color: #d93025;
  font-size: var(--conv-font-size-sm);
  padding: 0.5rem;
}
.convertikon__error[hidden] { display: none; }

/* ===== Unit lists ===== */
.convertikon__lists {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--conv-gap);
}
.convertikon__list-heading {
  font-size: var(--conv-font-size-sm);
  margin: 0 0 0.25rem 0;
  color: var(--conv-text-light);
}
.convertikon__unit-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--conv-border);
  border-radius: var(--conv-radius-small);
}
.convertikon__unit-item {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-bottom: 1px solid var(--conv-border);
  font-size: var(--conv-font-size-sm);
  transition: background 0.1s;
}
.convertikon__unit-item:last-child { border-bottom: none; }
.convertikon__unit-item:hover {
  background: rgba(26,115,232,0.03);
}
.convertikon__unit-item[aria-selected="true"],
.convertikon__unit-item--selected {
  background: var(--conv-selected-bg);
  font-weight: bold;
}
.convertikon__unit-value {
  color: var(--conv-text-light);
}

/* ===== To block: aligns output and optional scientific notation ===== */
.convertikon__to-block {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem;
  align-items: start;
}
.convertikon__to-output-col {
  display: flex;
  flex-direction: column;
}
.convertikon__scientific {
  font-size: var(--conv-font-size-sm);
  color: var(--conv-text-light);
  margin-top: 0.15rem;
}

/* ===== Mobile toggle button – hidden by default ===== */
.convertikon__list-toggle {
  display: none;
}

/* ===== Empty category message ===== */
.convertikon__empty-message {
  padding: 2rem;
  text-align: center;
  color: var(--conv-text-light);
  font-style: italic;
}

/* ===== Copy button inside result banner ===== */
.convertikon__result-banner {
  position: relative;               /* anchor for absolute positioning */
  padding-bottom: 2.8rem;           /* make room for the button */
}

.convertikon__copy-btn {
  position: absolute;
  bottom: 0.5rem;
  right: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.8rem;
  background: white;
  border: 1px solid var(--conv-border);
  border-radius: 20px;
  font-family: inherit;
  font-size: var(--conv-font-size-sm);
  color: var(--conv-text);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.convertikon__copy-btn:hover {
  background: var(--conv-selected-bg);
  border-color: var(--conv-primary);
  color: var(--conv-primary);
}

.convertikon__copy-btn:active {
  background: #d2e3fc;
}

.convertikon__copy-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.convertikon__copy-text {
  font-weight: 500;
}

/* ===== Responsive (max‑width: 768px) ===== */
@media (max-width: 768px) {
  .convertikon {
    grid-template-columns: 1fr !important;
    padding: 0.5rem;
  }

  /* Sidebar becomes a dropdown at the top */
  .convertikon__sidebar {
    display: block !important;
    overflow-x: visible;
    padding: 0;
    margin: 0 0 0.5rem 0;
    border: none;
    width: 100%;
  }
  .convertikon__sidebar-desktop {
    display: none;
  }
  .convertikon__sidebar-mobile {
    display: block;
    width: 100%;
  }
  .convertikon__category-select {
    width: 100%;
    padding: 0.6rem 0.8rem;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    border: 1px solid #dadce0;
    border-radius: 8px;
    background: white;
    color: #202124;
  }

  /* Unit tabs become a dropdown */
  .convertikon__unit-tabs-desktop {
    display: none;
  }
  .convertikon__unit-tabs-mobile {
    display: block;
    width: 100%;
  }
  .convertikon__unit-select {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border: 1px solid #dadce0;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    background: white;
    color: #202124;
    margin-bottom: 0.5rem;
    display: block;
  }

  .convertikon__lists {
    grid-template-columns: 1fr;
  }
  .convertikon__target-list-container {
    display: block;
  }
  .convertikon__list-toggle {
    display: none;
  }
}

/* Non‑numeric types: hide the mobile toggle */
.convertikon--non-numeric .convertikon__list-toggle {
  display: none !important;
}

/* ─── Force left sidebar on wider screens ─── */
@media screen and (min-width: 769px) {
  .convertikon {
    display: grid !important;
    grid-template-columns: 250px 1fr !important;
  }
  .convertikon__sidebar {
    display: flex !important;
    flex-direction: column !important;
    border-right: 1px solid #e0e0e0;
    padding-right: 1rem;
    margin-right: 1rem;
  }
  /* Restore desktop tab visibility */
  .convertikon__unit-tabs-desktop {
    display: block;
  }
  .convertikon__unit-tabs-mobile {
    display: none;
  }
}