/* ==========================================================================
   M04 ข้อสอบและงานส่ง — part A: ASM-01 list · ASM-02/03 builder · ASM-04 detail  (prefix .m04-)
   Tokens only (tokens.css); shared controls/cards/tables come from components.css.
   (Analytics / learner history / reviews use .m04r- in m04-review.css.)
   ========================================================================== */

/* ---------- shared bits ---------- */
.m04-code { display: inline-block; padding: 0 6px; border-radius: 3px; background: var(--rv-neutral-100); color: var(--rv-neutral-700); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; line-height: 18px; white-space: nowrap; vertical-align: middle; }
.m04-sub { display: block; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); font-weight: 400; color: var(--rv-text-muted); }
.m04-pre { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.m04-types { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.m04-setcell { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; min-width: 0; }
.m04-setcell__title { font-weight: 500; overflow-wrap: anywhere; }
.m04-idbtn { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; white-space: nowrap; }
.m04-extlink { overflow-wrap: anywhere; }

.m04-rules { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); color: var(--rv-text-secondary); }
.m04-rules li { display: flex; align-items: flex-start; gap: 8px; }
.m04-rules .rv-icon { flex: 0 0 auto; margin-top: 3px; color: var(--rv-neutral-500); }
.m04-rulebox { display: flex; flex-direction: column; gap: 8px; margin-top: var(--rv-space-4); padding: var(--rv-space-3); border: 1px dashed var(--rv-border); border-radius: var(--rv-radius-card); background: var(--rv-surface-subtle); }
.m04-rulebox > .rv-field__label { margin: 0; }
.m04-impact { margin: 8px 0 0; padding-left: 18px; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); }
.m04-impact li + li { margin-top: 4px; }

.m04-file { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; min-height: 36px; padding: 4px 8px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-control); background: var(--rv-surface-subtle); font-size: var(--rv-fs-small); line-height: 20px; }
.m04-file + .m04-file { margin-top: 6px; }
.m04-file > .rv-icon { flex: 0 0 auto; color: var(--rv-neutral-500); }
.m04-file__name { min-width: 0; font-weight: 500; overflow-wrap: anywhere; }
.m04-file > .rv-btn { margin-left: auto; }
.m04-files { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.m04-files li { display: flex; align-items: center; gap: 8px; min-height: 32px; min-width: 0; padding: 2px 4px 2px 8px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-control); background: var(--rv-surface-subtle); font-size: var(--rv-fs-small); line-height: 20px; }
.m04-files li > .rv-icon { flex: 0 0 auto; color: var(--rv-neutral-500); }
.m04-files li > span:nth-of-type(1) { flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; }
.m04-files li > .rv-btn { margin-left: auto; }

/* ---------- ASM-04 detail ---------- */
.m04-hmeta { display: flex; flex-direction: column; gap: 6px; margin-top: 4px; font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); color: var(--rv-text-secondary); }
.m04-hmeta__row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; min-width: 0; }
.m04-panel { min-width: 0; }
.m04-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.m04-links { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }

.m04-qviews { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.m04-qv { display: flex; flex-direction: column; gap: 8px; min-width: 0; padding: 12px 16px; border: 1px solid var(--rv-card-border); border-radius: var(--rv-radius-card); background: var(--rv-surface); }
.m04-qv__head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; }
.m04-qv__num { font-size: var(--rv-fs-body); font-weight: 600; }
.m04-qv__id { margin-left: auto; }
.m04-qv__text { font-size: var(--rv-fs-body); line-height: var(--rv-lh-body); }
.m04-qv__att { display: flex; flex-direction: column; gap: 4px; }
.m04-qv__opts { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.m04-qv__opts li { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; min-height: 36px; padding: 6px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-control); font-size: var(--rv-fs-small); line-height: 20px; }
.m04-qv__opts li.is-key { border-color: var(--rv-success-border); background: var(--rv-success-bg); }
.m04-qv__opts li.is-picked { box-shadow: inset 3px 0 0 var(--rv-info); }
.m04-qv__opts li.is-wrong { border-color: var(--rv-danger-border); background: var(--rv-danger-bg); }
.m04-qv__letter { flex: 0 0 auto; min-width: 18px; font-weight: 600; color: var(--rv-text-secondary); }
.m04-qv__opt { flex: 1 1 200px; min-width: 0; overflow-wrap: anywhere; }

/* ---------- ASM-02/03 builder ---------- */
.m04-bhead { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; font-size: var(--rv-fs-small); line-height: 20px; }
.m04-bhead__course { color: var(--rv-text-primary); font-size: var(--rv-fs-body); font-weight: 600; overflow-wrap: anywhere; }
.m04-builder { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: var(--rv-space-4); align-items: start; }
.m04-builder__main { display: flex; flex-direction: column; gap: var(--rv-space-4); min-width: 0; }
.m04-builder__aside { position: sticky; top: calc(var(--rv-header-height) + var(--rv-space-3)); min-width: 0; }

.m04-summary { display: flex; flex-direction: column; gap: 12px; }
.m04-sumlist { display: flex; flex-direction: column; gap: 8px; margin: 0; font-size: var(--rv-fs-small); line-height: 20px; }
.m04-sumlist > div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 8px; }
.m04-sumlist dt { color: var(--rv-text-muted); }
.m04-sumlist dd { min-width: 0; margin: 0; overflow-wrap: anywhere; }
.m04-ready { padding: 8px 12px; border-radius: var(--rv-radius-card); font-size: var(--rv-fs-small); line-height: var(--rv-lh-small); }
.m04-ready p { margin: 0; }
.m04-ready ul { margin: 4px 0 0; padding-left: 18px; }
.m04-ready.is-ok { display: flex; align-items: center; gap: 6px; border: 1px solid var(--rv-success-border); background: var(--rv-success-bg); color: var(--rv-success); }
.m04-ready.is-bad { border: 1px solid var(--rv-warning-border); background: var(--rv-warning-bg); color: var(--rv-neutral-800); }

.m04-note p { margin: 0; }
.m04-switch { min-height: var(--rv-control-h); }
.m04-pct { max-width: 180px; }

/* status: segmented radios (selection shown by ✓ + underline, not colour only) */
.m04-seg { display: inline-flex; flex-wrap: wrap; align-self: flex-start; overflow: hidden; border: 1px solid var(--rv-control-border); border-radius: var(--rv-radius-control); }
.m04-seg__opt { position: relative; display: inline-flex; cursor: pointer; }
.m04-seg__opt input { position: absolute; top: 0; left: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
.m04-seg__opt span { display: inline-flex; align-items: center; gap: 6px; min-height: var(--rv-control-h); padding: 0 16px; background: var(--rv-surface); color: var(--rv-neutral-700); font-size: var(--rv-fs-small); font-weight: 500; }
.m04-seg__opt + .m04-seg__opt span { border-left: 1px solid var(--rv-control-border); }
.m04-seg__opt input:checked + span { background: var(--rv-primary-50); color: var(--rv-primary-900); box-shadow: inset 0 -2px 0 var(--rv-primary-700); }
.m04-seg__opt input:checked + span::before { content: '✓'; font-weight: 700; }
.m04-seg__opt input:focus-visible + span { outline: 2px solid var(--rv-focus); outline-offset: -2px; }
.m04-seg__opt.is-disabled, .m04-seg__opt.is-disabled input { cursor: not-allowed; }
.m04-seg__opt.is-disabled span { background: var(--rv-neutral-100); color: var(--rv-text-muted); }

/* question cards */
.m04-qlist { display: flex; flex-direction: column; gap: 12px; }
.m04-q { min-width: 0; background: var(--rv-surface); border: 1px solid var(--rv-card-border); border-radius: var(--rv-radius-card); transition: box-shadow var(--rv-motion-fast) var(--rv-motion-easing); }
.m04-q.has-error { border-color: var(--rv-danger); }
.m04-q.is-dragging { opacity: .55; }
.m04-q.is-drop-before { box-shadow: 0 -3px 0 0 var(--rv-primary-500); }
.m04-q.is-drop-after { box-shadow: 0 3px 0 0 var(--rv-primary-500); }
.m04-q__head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 6px 8px 6px 4px; background: var(--rv-surface-subtle); border-bottom: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card) var(--rv-radius-card) 0 0; }
.m04-q__handle { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: var(--rv-radius-control); color: var(--rv-neutral-500); cursor: grab; user-select: none; -webkit-user-select: none; }
.m04-q__handle:hover { background: var(--rv-neutral-200); color: var(--rv-neutral-800); }
.m04-q__handle:active { cursor: grabbing; }
.m04-q__num { font-size: var(--rv-fs-body); font-weight: 600; }
.m04-q__type { margin-left: auto; }
.m04-q__type .rv-select { width: auto; min-width: 176px; }
.m04-q__tools { display: inline-flex; align-items: center; gap: 2px; }
.m04-q__del:hover { color: var(--rv-danger); }
.m04-q__body { display: flex; flex-direction: column; gap: 12px; min-width: 0; padding: 12px 16px 16px; }
.m04-q__row { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px 24px; }
.m04-q__row > .rv-field { flex: 0 1 220px; }
.m04-q__req { min-height: var(--rv-control-h); align-items: center; }
.m04-q .m04-rulebox { margin-top: 0; }

.m04-opts__list { list-style: none; margin: 0 0 4px; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.m04-opt { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; padding: 4px 6px; border: 1px solid transparent; border-radius: var(--rv-radius-control); }
.m04-opt > .rv-input { flex: 1 1 220px; }
.m04-opt.is-key { border-color: var(--rv-success-border); background: var(--rv-success-bg); }
.m04-opt.is-key::after { content: 'คำตอบที่ถูก'; display: inline-flex; align-items: center; min-height: 22px; padding: 0 8px; border: 1px solid var(--rv-success-border); border-radius: var(--rv-radius-pill); background: var(--rv-surface); color: var(--rv-success); font-size: var(--rv-fs-small); font-weight: 500; }
.m04-opt__mark { align-items: center; min-height: 32px; }
.m04-opt__letter { min-width: 16px; font-weight: 600; text-align: center; color: var(--rv-text-secondary); }
.m04-att { display: flex; flex-direction: column; gap: 6px; }
.m04-att__row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.m04-qadd { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--rv-border); }
.m04-qadd__label { margin-right: 4px; font-size: var(--rv-fs-small); font-weight: 500; color: var(--rv-neutral-700); }

/* sticky save bar (above the mobile bottom nav) */
.m04-savebar { grid-column: 1 / -1; position: sticky; bottom: 0; z-index: var(--rv-z-sticky); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding: 10px 16px; background: var(--rv-surface); border: 1px solid var(--rv-card-border); border-radius: var(--rv-radius-card); box-shadow: var(--rv-shadow-popover); }
.m04-savebar__info { display: flex; flex: 1 1 280px; flex-wrap: wrap; align-items: center; gap: 4px 8px; min-width: 0; font-size: var(--rv-fs-small); line-height: 20px; }
.m04-savebar__ctitle { max-width: 360px; min-width: 0; overflow: hidden; color: var(--rv-text-secondary); text-overflow: ellipsis; white-space: nowrap; }
.m04-savebar__btns { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

/* ---------- learner preview (modal) ---------- */
.m04-preview { display: flex; flex-direction: column; gap: 16px; }
.m04-preview__head { display: flex; flex-direction: column; gap: 4px; padding-bottom: 12px; border-bottom: 1px solid var(--rv-divider); }
.m04-preview__head p { margin: 0; }
.m04-preview__intro { padding: 10px 12px; border-radius: var(--rv-radius-card); background: var(--rv-surface-subtle); }
.m04-preview__intro p { margin: 0; }
.m04-preview__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.m04-pq { display: flex; flex-direction: column; gap: 8px; padding: 12px 16px; border: 1px solid var(--rv-card-border); border-radius: var(--rv-radius-card); }
.m04-pq__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.m04-pq__num { font-weight: 600; }
.m04-pq__text { font-size: var(--rv-fs-body); line-height: var(--rv-lh-body); }
.m04-pq__opts { display: flex; flex-direction: column; gap: 6px; min-width: 0; margin: 0; padding: 0; border: 0; }
.m04-pq__opt { display: flex; align-items: flex-start; gap: 8px; min-height: 40px; padding: 8px 12px; border: 1px solid var(--rv-border); border-radius: var(--rv-radius-control); font-size: var(--rv-fs-body); line-height: 22px; cursor: pointer; }
.m04-pq__opt:hover { background: var(--rv-neutral-50); }
.m04-pq__opt input { flex: 0 0 auto; width: 16px; height: 16px; margin: 3px 0 0; accent-color: var(--rv-primary-700); }
.m04-pq__opt:has(input:checked) { border-color: var(--rv-primary-700); background: var(--rv-primary-50); }
.m04-pq__letter { min-width: 16px; font-weight: 600; }

/* ---------- responsive ---------- */
@media (max-width: 1199px) {
  .m04-builder { grid-template-columns: minmax(0, 1fr); }
  .m04-builder__aside { position: static; }
}
@media (max-width: 767px) {
  .m04-savebar { bottom: calc(var(--rv-mobile-nav-height) + env(safe-area-inset-bottom)); margin: 0 calc(-1 * var(--rv-content-padding-mobile)); padding: 8px var(--rv-content-padding-mobile); border-left: 0; border-right: 0; border-radius: 0; }
  .m04-savebar__info { flex-basis: 100%; }
  .m04-savebar__btns { width: 100%; }
  .m04-savebar__btns .rv-btn { flex: 1 1 auto; }
  .m04-hide-sm { display: none !important; }
  .m04-q__head { padding: 6px 4px; }
  .m04-q__type { order: 10; flex: 1 1 100%; margin-left: 0; }
  .m04-q__type .rv-select { width: 100%; }
  .m04-q__tools { margin-left: auto; }
  .m04-q__body { padding: 12px; }
  .m04-q__row > .rv-field { flex-basis: 100%; }
  .m04-opt { padding: 4px 0; }
  .m04-opt.is-key { padding: 4px 6px; }
  .m04-qv { padding: 12px; }
  .m04-qv__id { margin-left: 0; }
  .m04-seg { display: flex; width: 100%; }
  .m04-seg__opt { flex: 1 1 0; }
  .m04-seg__opt span { justify-content: center; width: 100%; }
  .m04-sumlist > div { grid-template-columns: 88px minmax(0, 1fr); }
  .m04-pq { padding: 12px; }
}
@media (pointer: coarse) {
  .m04-q__handle { display: none; }
  .m04-seg__opt span { min-height: var(--rv-touch); }
  .m04-opt__mark { min-width: var(--rv-touch); min-height: var(--rv-touch); }
}