/* Periodic Speller — user-defined custom elements: the new-element
   dialog, clickable unmatched tile, and the bar that lists added
   custom elements with their actions. */

/* Custom element dialog */
.custom-el-dialog {
  max-width: 360px;
}

.custom-el-hint {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.custom-el-hint span {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
}

.custom-el-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.8rem;
}

.custom-el-field label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.custom-el-field input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}

.custom-el-field input:focus {
  border-color: var(--accent);
}

.custom-el-field input[readonly] {
  opacity: 0.6;
  cursor: not-allowed;
}

.custom-el-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.custom-el-save {
  background: var(--accent) !important;
  color: var(--surface-0) !important;
  border-color: var(--accent) !important;
}

.custom-el-save:hover {
  opacity: 0.9;
}

/* Unmatched tile clickable */
.tile-unmatched.clickable {
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.tile-unmatched.clickable:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.tile-unmatched.clickable .tile-name {
  color: var(--accent);
}

/* Custom element list bar */
.custom-el-list {
  width: 100%;
  margin-top: 1rem;
}

.custom-el-list[hidden] {
  display: none;
}

.custom-el-list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.custom-el-clear-all {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}

.custom-el-clear-all:hover {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, transparent);
}

#customElItems {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.custom-el-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.5rem 0.3rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text);
}

.custom-el-chip-sym {
  font-weight: 700;
  color: var(--accent);
}

.custom-el-chip-name {
  color: var(--text-muted);
}

.custom-el-chip-remove {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0 0.15rem;
  line-height: 1;
  border-radius: 3px;
  transition: color 0.15s, background 0.15s;
}

.custom-el-chip-remove:hover {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 15%, transparent);
}

.how-it-works {
  margin-top: 2.5rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.how-it-works summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}

.how-it-works p {
  margin-top: 0.6rem;
}