.lesson-builder-dialog { width: min(1500px, 100vw); max-width: none; height: 100vh; max-height: none; margin: 0; padding: 0; border: 0; color: var(--ink); background: #f4f5f6; }
.lesson-builder-dialog::backdrop { background: rgba(24, 26, 30, .52); }
.lesson-builder-shell { display: grid; grid-template-rows: auto minmax(0, 1fr); height: 100%; }
.lesson-builder-topbar { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 18px; padding: 14px 22px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 2px 14px rgba(25, 27, 31, .06); }
.lesson-builder-heading { min-width: 0; }
.lesson-builder-heading p, .lesson-builder-heading h2 { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lesson-builder-heading p { margin: 0 0 3px; color: var(--muted); font-size: 10px; }
.lesson-builder-heading h2 { margin: 0; font-size: 18px; }
.lesson-builder-back { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 9px; color: var(--ink); background: #fff; font-size: 22px; cursor: pointer; }
.lesson-builder-actions { display: flex; align-items: center; gap: 10px; }
.lesson-builder-status { max-width: 230px; color: var(--muted); font-size: 10px; text-align: right; }
.lesson-builder-status[data-status="dirty"] { color: #9a6c00; }
.lesson-builder-status[data-status="error"] { color: var(--brand-red); }
.lesson-builder-status[data-status="saved"] { color: #167544; }
.lesson-builder-body { display: grid; grid-template-columns: 280px minmax(0, 1fr); min-height: 0; }
.lesson-builder-sidebar { overflow-y: auto; padding: 22px; border-right: 1px solid var(--line); background: #fff; }
.lesson-builder-sidebar h3 { margin: 0; font-size: 15px; }
.lesson-builder-sidebar > p { margin: 7px 0 18px; color: var(--muted); font-size: 10px; line-height: 1.5; }
.lesson-block-palette { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.lesson-block-palette button { display: grid; min-height: 86px; align-content: center; justify-items: start; gap: 7px; padding: 12px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); background: #fff; text-align: left; cursor: pointer; }
.lesson-block-palette button:hover { border-color: #edbd19; background: #fffaf0; transform: translateY(-1px); }
.lesson-block-palette i { display: grid; width: 31px; height: 31px; place-items: center; border-radius: 8px; color: #fff; background: var(--brand-red); font-size: 12px; font-style: normal; font-weight: 850; }
.lesson-block-palette strong { font-size: 10px; }
.lesson-block-palette small { color: var(--muted); font-size: 8px; line-height: 1.35; }
.lesson-builder-rule { margin-top: 20px; padding: 14px; border-radius: 9px; color: #705300; background: var(--soft-yellow); }
.lesson-builder-rule strong { font-size: 10px; }
.lesson-builder-rule p { margin: 5px 0 0; font-size: 8px; line-height: 1.5; }
.lesson-builder-main { overflow-y: auto; padding: 24px 28px 80px; }
.lesson-builder-canvas { width: min(920px, 100%); margin: 0 auto; }
.lesson-builder-title-card { padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: var(--shadow); }
.lesson-builder-title-card label { display: grid; gap: 8px; }
.lesson-builder-title-card span { color: var(--muted); font-size: 9px; font-weight: 750; text-transform: uppercase; }
.lesson-builder-title-card input { width: 100%; padding: 0; border: 0; outline: 0; color: var(--ink); background: transparent; font-size: 26px; font-weight: 800; letter-spacing: -.025em; }
.lesson-builder-meta { display: flex; justify-content: space-between; gap: 16px; margin: 17px 2px 10px; color: var(--muted); font-size: 9px; font-weight: 700; }
.lesson-block-list { display: grid; gap: 12px; }
.lesson-block-card { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 6px 18px rgba(29, 31, 35, .045); }
.lesson-block-card > header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 15px; border-bottom: 1px solid var(--line); background: #f8f8f9; }
.lesson-block-card > header > div:first-child { display: flex; align-items: center; gap: 9px; }
.lesson-block-card > header strong { font-size: 11px; }
.lesson-block-icon { display: grid; width: 29px; height: 29px; place-items: center; border-radius: 7px; color: #fff; background: var(--brand-red); font-size: 10px; font-weight: 850; }
.lesson-block-tools { display: flex; gap: 5px; }
.lesson-block-tools button { min-width: 30px; min-height: 29px; padding: 0 8px; border: 1px solid var(--line); border-radius: 7px; color: #5e646d; background: #fff; font-size: 9px; cursor: pointer; }
.lesson-block-tools button:hover { border-color: #d9ad12; color: var(--ink); }
.lesson-block-tools button:disabled { opacity: .35; cursor: default; }
.lesson-block-tools .is-danger { color: var(--brand-red); }
.lesson-block-body { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 18px; }
.lesson-builder-field { display: grid; min-width: 0; gap: 7px; }
.lesson-builder-field > span { color: #656c75; font-size: 9px; font-weight: 750; }
.lesson-builder-field input, .lesson-builder-field textarea, .lesson-builder-field select { width: 100%; min-height: 42px; padding: 10px 11px; border: 1px solid var(--line); border-radius: 8px; outline: 0; color: var(--ink); background: #fff; font: inherit; font-size: 11px; }
.lesson-builder-field textarea { min-height: 98px; resize: vertical; line-height: 1.55; }
.lesson-builder-field input:focus, .lesson-builder-field textarea:focus, .lesson-builder-field select:focus { border-color: var(--brand-yellow); box-shadow: 0 0 0 3px rgba(255, 201, 40, .16); }
.lesson-block-style-row { display: flex; grid-column: 1 / -1; flex-wrap: wrap; gap: 10px; }
.lesson-builder-field--compact { width: 170px; }
.lesson-rich-field { grid-column: 1 / -1; overflow: hidden; border: 1px solid var(--line); border-radius: 9px; }
.lesson-inline-toolbar { display: flex; gap: 5px; padding: 7px; border-bottom: 1px solid var(--line); background: #f8f8f9; }
.lesson-inline-toolbar button { min-width: 31px; min-height: 29px; padding: 0 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; font-size: 10px; font-weight: 800; cursor: pointer; }
.lesson-rich-input { min-height: 120px; padding: 14px; outline: 0; font-size: 13px; line-height: 1.65; }
.lesson-rich-input:empty::before { content: attr(data-placeholder); color: #a2a7ae; }
.lesson-media-editor, .lesson-quiz-editor { display: grid; grid-column: 1 / -1; gap: 12px; }
.lesson-media-editor > img, .lesson-media-editor > video, .lesson-media-editor > audio { width: min(540px, 100%); max-height: 320px; margin: 0 auto; border-radius: 10px; object-fit: contain; background: #18191c; }
.lesson-media-editor > img { background: #f2f3f4; }
.lesson-upload-button { display: flex; min-height: 42px; align-items: center; justify-content: center; padding: 8px 14px; border: 1px dashed #d5aa10; border-radius: 8px; color: #6f5200; background: #fff9df; font-size: 10px; font-weight: 800; cursor: pointer; }
.lesson-upload-button input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.lesson-upload-status, .lesson-quiz-editor > p, .lesson-block-note { margin: 0; color: var(--muted); font-size: 9px; line-height: 1.5; }
.lesson-quiz-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.lesson-quiz-actions .button { width: auto; }
.lesson-builder-empty { margin-top: 12px; padding: 38px 24px; border: 1px dashed #d9dce0; border-radius: 12px; color: var(--muted); background: #fff; text-align: center; }
.lesson-builder-empty strong { display: block; color: var(--ink); font-size: 15px; }
.lesson-builder-empty p { margin: 7px 0 0; font-size: 10px; }

@media (max-width: 900px) {
  .lesson-builder-topbar { grid-template-columns: auto minmax(0, 1fr); padding: 11px 12px; }
  .lesson-builder-actions { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; }
  .lesson-builder-status { grid-column: 1 / -1; max-width: none; text-align: center; }
  .lesson-builder-body { display: block; overflow-y: auto; }
  .lesson-builder-sidebar, .lesson-builder-main { overflow: visible; }
  .lesson-builder-sidebar { padding: 15px 12px; border-right: 0; border-bottom: 1px solid var(--line); }
  .lesson-block-palette { display: flex; overflow-x: auto; padding-bottom: 4px; }
  .lesson-block-palette button { min-width: 128px; min-height: 78px; }
  .lesson-builder-rule { display: none; }
  .lesson-builder-main { padding: 15px 12px 80px; }
  .lesson-builder-title-card { padding: 16px; }
  .lesson-builder-title-card input { font-size: 21px; }
  .lesson-block-card > header { align-items: flex-start; }
  .lesson-block-tools { flex-wrap: wrap; justify-content: flex-end; }
  .lesson-block-body { grid-template-columns: 1fr; padding: 14px; }
  .lesson-block-style-row { display: grid; grid-template-columns: 1fr; }
  .lesson-builder-field--compact { width: 100%; }
}

/* v5.3 — расширенные композиционные блоки */
.lesson-block-card[data-block-type="section"] .lesson-block-icon, .lesson-block-card[data-block-type="split"] .lesson-block-icon, .lesson-block-card[data-block-type="gallery"] .lesson-block-icon, .lesson-block-card[data-block-type="steps"] .lesson-block-icon, .lesson-block-card[data-block-type="accordion"] .lesson-block-icon, .lesson-block-card[data-block-type="result"] .lesson-block-icon { color: #5f4500; background: var(--brand-yellow); }
.lesson-block-card[data-block-type="section"] .lesson-block-body, .lesson-block-card[data-block-type="split"] .lesson-block-body { align-items: start; }
.lesson-media-editor > audio { width: min(540px, 100%); margin: 0 auto; }
.lesson-gallery-editor { display: grid; grid-column: 1 / -1; gap: 12px; }
.lesson-gallery-editor__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.lesson-gallery-editor__grid > div { display: grid; gap: 7px; padding: 8px; border: 1px solid var(--line); border-radius: 9px; background: #f8f8f9; }
.lesson-gallery-editor__grid img { width: 100%; aspect-ratio: 4 / 3; border-radius: 7px; object-fit: cover; }
.lesson-gallery-editor__grid input { min-width: 0; height: 36px; padding: 0 9px; border: 1px solid var(--line); border-radius: 7px; font: inherit; font-size: 9px; }
.lesson-gallery-editor__grid button { min-height: 32px; border: 0; border-radius: 7px; color: var(--brand-red-dark); background: var(--soft-red); font-size: 9px; font-weight: 750; cursor: pointer; }
@media (max-width: 620px) { .lesson-gallery-editor__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }


/* v5.4 — расширенное оформление редактора */
.lesson-inline-toolbar { flex-wrap: wrap; }
.marker-button { border-radius: 999px !important; font-size: 14px !important; line-height: 1; }
.marker-button--yellow { color: #d8a900; }
.marker-button--red { color: #d9394f; }
.marker-button--green { color: #248653; }
.marker-button--blue { color: #2678ba; }
.lesson-builder-field--range { grid-template-columns: 1fr auto; align-items: center; }
.lesson-builder-field--range > span { grid-column: 1 / -1; }
.lesson-builder-field--range input { min-height: 24px; padding: 0; border: 0; box-shadow: none; accent-color: var(--brand-red); }
.lesson-builder-field--range output { color: var(--brand-red-dark); font-size: 11px; font-weight: 850; }
.lesson-media-remove { min-height: 36px; border: 1px solid #efb2ba; border-radius: 9px; color: var(--brand-red-dark); background: #fff4f5; font-size: 9px; font-weight: 800; cursor: pointer; }
.lesson-practice-editor { display: grid; grid-column: 1 / -1; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 2px; }
.lesson-practice-editor > .lesson-media-editor, .lesson-practice-editor > .lesson-builder-field:nth-last-child(-n+2) { grid-column: 1 / -1; }
@media (max-width: 720px) { .lesson-practice-editor { grid-template-columns: 1fr; } }