/* ==========================================================================
   M02 detail pages — CRS-04 course detail, CRS-06 overview, CRS-07 lesson detail,
   TPL-01 certificate design (prefix .m02d-). Tokens only (tokens.css); design system §5, §6, §9.
   ========================================================================== */

/* ---------------------------------------------------------------- page + course header (CRS-04) */
.m02d-page { gap: var(--rv-space-4); }
.m02d-head { display: flex; flex-direction: column; gap: var(--rv-space-3); }
.m02d-head__row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--rv-space-4); align-items: start; }
.m02d-head__cover .rv-thumb { display: block; border-radius: var(--rv-radius-card); }
.m02d-head__main { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.m02d-head__code { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); color: var(--rv-text-secondary); }
.m02d-head__code code { font-weight: 600; color: var(--rv-text-primary); }
.m02d-head .rv-page-header__titlerow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.m02d-head .rv-page-title { overflow-wrap: anywhere; }
.m02d-head__facts { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 0; }
.m02d-head__facts > div { display: flex; align-items: center; gap: 6px; min-width: 0; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); }
.m02d-head__facts dt { color: var(--rv-text-muted); white-space: nowrap; }
.m02d-head__facts dd { margin: 0; min-width: 0; color: var(--rv-text-primary); }
.m02d-head__ins { display: inline-flex; flex-wrap: wrap; gap: 4px 10px; }
.m02d-head__ins > span { display: inline-flex; align-items: center; gap: 4px; }
.m02d-head__actions { display: flex; flex-wrap: wrap; gap: var(--rv-space-2); justify-content: flex-end; }
.m02d-price { display: inline-flex; flex-wrap: wrap; align-items: baseline; gap: 4px 6px; font-variant-numeric: tabular-nums; }
.m02d-price b { font-weight: 600; color: var(--rv-text-primary); }
.m02d-price s { color: var(--rv-text-muted); }
.m02d-price__off { font-size: 11px; line-height: 16px; padding: 0 6px; border-radius: var(--rv-radius-pill); background: var(--rv-danger-bg); color: var(--rv-danger); }

@media (max-width: 1279px) {
  .m02d-head__row { grid-template-columns: auto minmax(0, 1fr); }
  .m02d-head__actions { grid-column: 1 / -1; justify-content: flex-start; }
}
@media (max-width: 767px) {
  .m02d-head__row { grid-template-columns: minmax(0, 1fr); gap: var(--rv-space-3); }
  .m02d-head__cover .rv-thumb--lg { width: 128px; height: 72px; }
  .m02d-head__facts { gap: 4px 14px; }
  .m02d-head__actions .rv-btn { flex: 1 1 auto; min-height: var(--rv-touch); }
  .m02d-head__actions .rv-btn--icon { flex: 0 0 var(--rv-touch); }
}

/* ---------------------------------------------------------------- tab strip, stats bar, notes */
.m02d-tabs { min-width: 0; }
.m02d-tab { min-width: 0; }
.m02d-tabroot { min-width: 0; }
.m02d-statbar { display: flex; flex-direction: column; gap: 6px; padding: var(--rv-space-3); border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface-subtle); }
.m02d-basis { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); color: var(--rv-text-secondary); }
.m02d-basis:empty { display: none; }
.m02d-basis b { font-weight: 600; color: var(--rv-text-primary); }
.m02d-basis__warn { color: var(--rv-warning); }
.m02d-note { display: flex; gap: 6px; align-items: flex-start; margin: var(--rv-space-2) 0 0; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); color: var(--rv-text-secondary); }
.m02d-note .rv-icon { flex: 0 0 auto; margin-top: 3px; color: var(--rv-text-muted); }
.m02d-kpis { align-items: stretch; }
.m02d-badges { display: inline-flex; flex-wrap: wrap; gap: 4px; vertical-align: middle; }
.m02d-ctas { display: flex; flex-wrap: wrap; gap: var(--rv-space-2); }
.m02d-h { margin: var(--rv-space-4) 0 var(--rv-space-2); font-size: 14px; line-height: 22px; font-weight: 600; }
.m02d-ctable th, .m02d-ctable td { white-space: nowrap; }
.m02d-gate { padding: var(--rv-space-4) 0; }
.m02d-anon { display: inline-flex; align-items: center; gap: 6px; color: var(--rv-text-secondary); font-style: italic; }
.m02d-impact { margin: var(--rv-space-2) 0; padding-left: 18px; font-size: 13px; line-height: 20px; }
.m02d-drill { font-variant-numeric: tabular-nums; }
.m02d-pvbar { display: flex; flex-wrap: wrap; align-items: center; gap: var(--rv-space-2) var(--rv-space-3); }
@media (max-width: 767px) {
  .m02d-statbar { padding: var(--rv-space-2); }
}

/* ---------------------------------------------------------------- curriculum tree (CRS-04 · curriculum) */
.m02d-tree { display: flex; flex-direction: column; gap: var(--rv-space-3); min-width: 0; }
.m02d-lrow {
  display: grid; grid-template-columns: minmax(180px, 2.4fr) minmax(88px, .8fr) 64px minmax(120px, 1.2fr) 64px 64px 64px 72px;
  gap: var(--rv-space-3); align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--rv-divider); font-size: var(--rv-fs-small); line-height: var(--rv-lh-small);
}
.m02d-lrow:last-child { border-bottom: 0; }
.m02d-lrow--head { padding-top: 0; font-weight: 600; color: var(--rv-text-secondary); border-bottom: 1px solid var(--rv-border); }
.m02d-lrow .is-num { text-align: center; font-variant-numeric: tabular-nums; }
.m02d-lrow.is-chapter .m02d-lrow__title { padding-left: 20px; }
.m02d-lrow__title { display: flex; align-items: center; gap: 8px; min-width: 0; }
.m02d-lrow__no { flex: 0 0 auto; min-width: 30px; color: var(--rv-text-muted); font-variant-numeric: tabular-nums; }
.m02d-lrow__name { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 2px; overflow-wrap: anywhere; }
.m02d-lrow__name a { font-size: 13px; line-height: 20px; }
.m02d-sec { border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface); overflow: hidden; }
.m02d-sec__head {
  width: 100%; display: flex; align-items: center; gap: 8px; padding: 10px 12px; min-height: var(--rv-touch);
  background: var(--rv-surface-subtle); border: 0; border-bottom: 1px solid var(--rv-divider); text-align: left; color: var(--rv-text-primary);
}
.m02d-sec__head:hover { background: var(--rv-neutral-100); }
.m02d-sec__head .rv-icon { flex: 0 0 auto; transition: transform var(--rv-motion-fast) var(--rv-motion-easing); }
.m02d-sec__head[aria-expanded="false"] .rv-icon { transform: rotate(-90deg); }
.m02d-sec__head[aria-expanded="false"] { border-bottom-color: transparent; }
.m02d-sec__title { flex: 1 1 auto; min-width: 0; font-weight: 600; font-size: 14px; line-height: 22px; }
.m02d-sec__meta { flex: 0 0 auto; font-size: var(--rv-fs-small); color: var(--rv-text-muted); white-space: nowrap; }
.m02d-sec__intro { display: flex; flex-direction: column; gap: 2px; padding: 8px 12px; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); color: var(--rv-text-secondary); border-bottom: 1px dashed var(--rv-divider); }
.m02d-sec__intro b { font-weight: 600; color: var(--rv-text-primary); }
.m02d-sec__empty { padding: 12px; }
.m02d-chap { display: flex; align-items: center; gap: 6px; padding: 8px 12px 6px 44px; font-size: var(--rv-fs-small); font-weight: 600; color: var(--rv-primary-900); background: var(--rv-primary-50); }
@media (max-width: 1199px) {
  .m02d-lrow--head { display: none; }
  .m02d-lrow { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px 12px; padding: 10px 12px; }
  .m02d-lrow__title { grid-column: 1 / -1; }
  .m02d-lrow > [data-label] { display: flex; flex-direction: column; gap: 2px; }
  .m02d-lrow > [data-label]::before { content: attr(data-label); font-size: 11px; line-height: 16px; color: var(--rv-text-muted); }
  .m02d-lrow .is-num { text-align: left; }
}
@media (max-width: 767px) {
  .m02d-lrow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .m02d-lrow.is-chapter .m02d-lrow__title { padding-left: 0; }
  .m02d-chap { padding-left: 12px; }
  .m02d-sec__meta { display: none; }
}

/* ---------------------------------------------------------------- learner course-page mock (frontend tab / Preview)
   page wrappers only — the mock itself (.m02d-fe, .m02d-fe__*, .m02d-rich) is shared: assets/css/frontend-preview.css */
.m02d-fe-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--rv-space-4); align-items: start; }
@media (min-width: 1440px) { .m02d-fe-grid { grid-template-columns: minmax(0, 1fr) 340px; } }
.m02d-fe-stage { overflow-x: auto; padding: var(--rv-space-3); background: var(--rv-neutral-100); border-radius: var(--rv-radius-card); }
@media (max-width: 767px) { .m02d-fe-stage { padding: var(--rv-space-2); } }
.m02d-pvmodal .m02d-fe-stage { min-height: 60vh; }

/* ---------------------------------------------------------------- lesson preview (curriculum modal, CRS-07) */
.m02d-lp { display: flex; flex-direction: column; gap: var(--rv-space-3); }
.m02d-lp__player { aspect-ratio: 16 / 9; max-height: 320px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 16px; border-radius: var(--rv-radius-card); background: var(--rv-neutral-800); color: var(--rv-neutral-0); text-align: center; }
.m02d-lp__player span { font-size: var(--rv-fs-small); color: var(--rv-neutral-300); }
.m02d-lp__doc { display: flex; align-items: center; gap: 12px; padding: 12px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface-subtle); flex-wrap: wrap; }
.m02d-lp__doc > div { flex: 1 1 200px; min-width: 0; overflow-wrap: anywhere; }
.m02d-lp__url { display: flex; gap: 6px; align-items: center; overflow-wrap: anywhere; margin: 0; }
.m02d-att { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.m02d-att li { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; min-height: 36px; padding: 6px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); font-size: 13px; }
.m02d-att li > span:first-of-type { flex: 1 1 160px; min-width: 0; overflow-wrap: anywhere; }

/* ---------------------------------------------------------------- CRS-07 lesson detail */
.m02d-prevnext { display: flex; flex-direction: column; gap: 8px; }
.m02d-prevnext a { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); min-height: var(--rv-touch); }
.m02d-prevnext a:hover { background: var(--rv-primary-50); text-decoration: none; }
.m02d-prevnext a span { display: flex; flex-direction: column; min-width: 0; overflow-wrap: anywhere; }
.m02d-prevnext a small { font-size: 11px; color: var(--rv-text-muted); }
.m02d-prevnext a.is-next { justify-content: space-between; text-align: left; }

/* ---------------------------------------------------------------- TPL-01 certificate design */
.m02d-cdhead { align-items: center; }
.m02d-cd { display: flex; flex-direction: column; gap: var(--rv-space-4); min-width: 0; }
.m02d-cd__body { min-width: 0; }
.m02d-cd__grid { display: grid; grid-template-columns: minmax(340px, 440px) minmax(0, 1fr); gap: var(--rv-space-6); align-items: start; }
.m02d-cd__form { min-width: 0; }
.m02d-cd__fs { margin: 0; padding: 12px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); display: flex; flex-direction: column; gap: var(--rv-space-3); min-width: 0; }
.m02d-cd__fs legend { padding: 0 4px; font-size: 14px; line-height: 22px; font-weight: 600; }
.m02d-cd__ver { display: flex; gap: 8px; align-items: flex-start; padding: 8px 12px; border-radius: var(--rv-radius-card); background: var(--rv-success-bg); color: var(--rv-success); font-size: 13px; line-height: 20px; }
.m02d-cd__ver .rv-icon { flex: 0 0 auto; margin-top: 2px; }
.m02d-cd__bgs { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; }
.m02d-cd__bg, .m02d-cd__sig {
  position: relative; display: flex; flex-direction: column; gap: 6px; padding: 8px; border: 1px solid var(--rv-border); border-radius: var(--rv-radius-card);
  background: var(--rv-surface); cursor: pointer; font-size: 12px; line-height: 18px; min-height: var(--rv-touch);
}
.m02d-cd__bg:hover, .m02d-cd__sig:hover { border-color: var(--rv-neutral-600); }
.m02d-cd__bg.is-selected, .m02d-cd__sig.is-selected { border-color: var(--rv-primary-700); box-shadow: inset 0 0 0 1px var(--rv-primary-700); background: var(--rv-primary-50); }
.m02d-cd__bg input, .m02d-cd__sig input { position: absolute; top: 8px; right: 8px; z-index: 1; width: 16px; height: 16px; margin: 0; accent-color: var(--rv-primary-700); }
.m02d-cd__bg:focus-within, .m02d-cd__sig:focus-within { outline: 2px solid var(--rv-focus); outline-offset: 2px; }
.m02d-cd__swatch { display: block; width: 100%; border-radius: 2px; overflow: hidden; pointer-events: none; }
.m02d-cd__swatch .rv-cert { box-shadow: none; }
/* the swatch is built from <span>s (it lives inside a <label>) — give the certificate boxes their block layout */
.m02d-cd__swatch .rv-cert-wrap, .m02d-cd__swatch .rv-cert { display: block; }
.m02d-cd__swatch.is-upload { aspect-ratio: 297 / 210; display: flex; align-items: center; justify-content: center; background: var(--rv-neutral-50); border: 1px dashed var(--rv-neutral-400); color: var(--rv-text-muted); }
.m02d-cd__swatch.is-upload img { width: 100%; height: 100%; object-fit: cover; }
.m02d-cd__bgname { padding-right: 18px; overflow-wrap: anywhere; }
.m02d-cd__sigs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.m02d-cd__sig { flex-direction: row; align-items: center; }
.m02d-cd__sigart { flex: 0 0 72px; height: 32px; display: flex; align-items: center; justify-content: center; color: var(--rv-text-muted); background: var(--rv-neutral-50); border-radius: 2px; }
.m02d-cd__sigart svg:not(.rv-icon) { width: 72px; height: 24px; }
.m02d-cd__sigart img { max-width: 100%; max-height: 100%; object-fit: contain; }
.m02d-cd__sig > span:last-of-type { padding-right: 18px; }
.m02d-cd__signers { display: flex; flex-direction: column; gap: var(--rv-space-3); min-width: 0; }
.m02d-cd__signer { display: flex; flex-direction: column; gap: var(--rv-space-3); padding: 10px 12px 12px; border: 1px solid var(--rv-border); border-radius: var(--rv-radius-card); background: var(--rv-surface); min-width: 0; }
.m02d-cd__signer-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 14px; line-height: 22px; }
.m02d-cd__signer-tools { display: inline-flex; gap: 2px; }
.m02d-cd__signer-add { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
/* versions table: one line per signer in "ผู้ลงนาม / ตำแหน่ง" and "ลายเซ็น" — a signature line is as tall as name + position */
.m02d-cd__vline + .m02d-cd__vline { margin-top: 6px; }
.m02d-cd__vline.is-sig:not(:only-child) { min-height: calc(var(--rv-lh-body) + var(--rv-lh-small)); }
.m02d-cd__upload { display: flex; flex-direction: column; gap: 6px; padding: 10px; border: 1px dashed var(--rv-neutral-400); border-radius: var(--rv-radius-card); background: var(--rv-neutral-50); }
.m02d-cd__file { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; min-height: 40px; }
.m02d-cd__thumb { width: 64px; height: 45px; object-fit: cover; border: 1px solid var(--rv-divider); border-radius: 2px; background: var(--rv-surface); }
.m02d-cd__thumb.is-sig { object-fit: contain; }
.m02d-cd__fmeta { flex: 1 1 140px; min-width: 0; display: flex; flex-direction: column; }
.m02d-cd__warn { display: flex; gap: 6px; align-items: flex-start; margin: 0; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); color: var(--rv-warning); }
.m02d-cd__warn .rv-icon { flex: 0 0 auto; margin-top: 3px; }
.m02d-cd__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--rv-space-2); }
.m02d-cd__savehint { flex: 1 1 100%; }
.m02d-cd__side { position: sticky; top: calc(var(--rv-header-height) + 12px); display: flex; flex-direction: column; gap: var(--rv-space-2); min-width: 0; }
.m02d-cd__sidehead { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.m02d-cd__stage { padding: var(--rv-space-4); background: var(--rv-neutral-100); border-radius: var(--rv-radius-card); min-width: 0; }
.m02d-cd__stage.is-modal { padding: var(--rv-space-3); }
.m02d-cd__pvbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--rv-space-2); }
.m02d-cd__device { margin: 0 auto; width: 100%; transition: max-width var(--rv-motion-base) var(--rv-motion-easing); }
.m02d-cd__device.is-tablet { max-width: 768px; }
.m02d-cd__device.is-mobile { max-width: 375px; }
@media (max-width: 1199px) {
  .m02d-cd__grid { grid-template-columns: minmax(0, 1fr); }
  .m02d-cd__side { position: static; }
}
@media (max-width: 767px) {
  .m02d-cd__stage { padding: var(--rv-space-2); }
  .m02d-cd__sigs { grid-template-columns: minmax(0, 1fr); }
  .m02d-cd__bgs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .m02d-cd__actions .rv-btn { flex: 1 1 auto; min-height: var(--rv-touch); }
}