.formula-dialog { width: min(820px, calc(100vw - 32px)); max-width: none; max-height: calc(100dvh - 32px); padding: 0; border: 1px solid #dce2d5; border-radius: 16px; color: var(--ink, #23362d); background: #fffefb; box-shadow: 0 24px 80px #18281d35; overflow: auto; }
.formula-dialog::backdrop { background: #17241c66; }
.formula-form { display: flex; flex-direction: column; max-height: calc(100dvh - 34px); }
.formula-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; padding: 22px 26px 16px; border-bottom: 1px solid #e6e9e0; }
.formula-header h2 { margin: 2px 0 7px; font-size: 23px; }
.formula-header p { margin: 0; color: #66715f; font-size: 13px; line-height: 1.6; }
.formula-header .formula-eyebrow { color: #587544; font-size: 11px; letter-spacing: .08em; }
.formula-close { flex: 0 0 32px; width: 32px; height: 32px; border: 0; background: transparent; font-size: 25px; }
.formula-body { display: grid; grid-template-columns: 194px minmax(0, 1fr); min-height: 0; overflow: auto; }
.formula-templates { padding: 18px 12px; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); align-content: start; gap: 7px; background: #f5f7f0; border-right: 1px solid #e4e8dc; }
.formula-templates button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 7px; min-height: 76px; padding: 10px 5px; border: 1px solid transparent; border-radius: 8px; background: transparent; font-size: 12px; }
.formula-templates button:hover { background: #eaf0e2; }
.formula-templates button[aria-pressed="true"] { border-color: #628348; background: #fff; color: #355b26; box-shadow: 0 1px 4px #364d1610; }
.formula-template-sample { min-height: 26px; display: flex; align-items: center; font-size: 14px; }
.formula-templates [data-template="integral"] .formula-template-sample, .formula-templates [data-template="matrix"] .formula-template-sample { font-size: 12px; }
.formula-editing { min-width: 0; padding: 20px 24px; }
.formula-editing h3 { margin: 0 0 13px; font-size: 15px; }
.formula-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; }
.formula-field { display: flex; flex-direction: column; gap: 6px; min-width: 0; font-size: 13px; }
.formula-field:only-child { grid-column: 1 / -1; }
.formula-field input, .formula-field select, .formula-field textarea, #formula-source { width: 100%; min-width: 0; padding: 9px 10px; border: 1px solid #cbd5c0; border-radius: 6px; background: #fff; color: #243520; font: inherit; }
.formula-field textarea { resize: vertical; line-height: 1.6; }
.formula-field small { color: #6d7767; line-height: 1.6; }
.formula-symbols { display: flex; flex-wrap: wrap; gap: 5px; margin: 14px 0 18px; }
.formula-symbols button { min-width: 31px; min-height: 31px; padding: 4px 6px; border: 1px solid #e1e6da; border-radius: 5px; background: #f7f9f3; font: 18px Georgia, serif; }
.formula-placement { display: flex; flex-wrap: wrap; gap: 12px; border: 0; padding: 0; margin: 0 0 15px; font-size: 13px; }
.formula-placement legend { margin-bottom: 8px; color: #68715f; font-size: 12px; }
.formula-placement label { display: flex; flex-direction: row; align-items: center; gap: 5px; margin: 0; }
.formula-placement input { width: auto; accent-color: #53753b; }
.formula-preview-section { border: 1px solid #dfe6d7; border-radius: 9px; background: #fff; padding: 12px 15px; }
.formula-section-label { display: block; color: #738168; font-size: 11px; }
.formula-preview { min-height: 86px; display: flex; align-items: center; padding: 15px 0; overflow: auto; font-size: 20px; }
/* Auto margins centre short formulas yet keep the start of long ones reachable by scrolling. */
.formula-preview > .katex, .formula-preview > .katex-display { margin: auto; }
.formula-error { margin: 0; font-size: 12px; line-height: 1.6; color: #9a4136; }
.formula-advanced { margin-top: 16px; color: #67745b; font-size: 12px; }
.formula-advanced summary { cursor: pointer; padding: 5px 0; }
.formula-advanced label { display: block; margin: 10px 0 6px; }
#formula-source { resize: vertical; color: #34412c; font: 13px/1.6 ui-monospace, monospace; }
.formula-footer { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 9px; padding: 15px 24px; border-top: 1px solid #e3e8dc; background: #fffefb; }
.formula-hint { margin-right: auto; color: #737c6b; font-size: 12px; }
.formula-footer button { padding: 9px 16px; min-height: 38px; }
.formula-dialog button:focus-visible, .formula-dialog input:focus-visible, .formula-dialog select:focus-visible, .formula-dialog textarea:focus-visible, .formula-dialog summary:focus-visible { outline: 2px solid #547738; outline-offset: 3px; }
#rich-editor .formula-atom, #rich-editor [data-markdown].math-inline, #rich-editor [data-markdown].math-block { cursor: pointer; border-radius: 4px; }
#rich-editor .formula-atom:hover, #rich-editor [data-markdown].math-inline:hover, #rich-editor [data-markdown].math-block:hover { outline: 1px solid #abc096; background: #f2f6ec; }
@media (max-width: 600px) {
  .formula-dialog { width: calc(100vw - 16px); max-height: calc(100dvh - 16px); border-radius: 12px; }
  .formula-form { max-height: calc(100dvh - 18px); }
  .formula-header { padding: 15px 16px 12px; }
  .formula-header h2 { font-size: 20px; }
  .formula-body { display: flex; flex-direction: column; }
  .formula-templates { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 5px; padding: 10px; border-right: 0; border-bottom: 1px solid #e4e8dc; }
  .formula-templates button { min-height: 60px; padding: 6px 3px; }
  .formula-editing { padding: 16px; }
  .formula-footer { padding: 12px 16px; }
  .formula-hint { width: 100%; }
  .formula-symbols button { min-width: 35px; min-height: 35px; }
}
/* Give atomic equations a stable hit target inside an editable paragraph. */
#rich-editor .formula-atom.math-inline { display: inline-block; vertical-align: baseline; padding: 1px 2px; }
#rich-editor .formula-atom.math-block { display: block; }