/* Muscle Planner (docs/ai-personal-trainer/muscle-planner.md): the body diagram (muscle-figure.js) and the page
 * (muscle-planner-ui.js). Selection is never shown by colour alone: a selected muscle also gets a hatch pattern and a heavy
 * outline, and is listed as a chip and a ticked box beside the picture. */

/* ---- the body diagram ---- */
/* Each view is the user's anatomy picture (public/assets/muscle-figures) with transparent muscle regions over it; hovered
 * muscles are tinted, chosen ones painted orange-red. Sizes are in the pictures' 600 x 900 units. */
.mf-figure { width: 100%; height: auto; display: block; }
.mf-photo { pointer-events: none; }
.mf-muscle { cursor: pointer; }
.mf-muscle .mf-shape { fill: transparent; stroke: none; transition: fill 0.12s ease; }
.mf-muscle .mf-hit { fill: none; stroke: transparent; pointer-events: stroke; }
.mf-muscle .mf-glow, .mf-muscle .mf-hatch { display: none; pointer-events: none; stroke: none; }
.mf-muscle .mf-glow { fill: #ff5a2c; opacity: 0.55; }
.mf-muscle .mf-hatch { fill: var(--mf-hatch); }
.mf-hatch-line { stroke: rgba(255, 230, 210, 0.5); stroke-width: 2.4; }
/* Hover is a tint and an outline; on touch screens (no real hover) the class set by the page is the only hover. */
.mf-muscle.is-hover .mf-shape { fill: rgba(255, 122, 69, 0.35); stroke: #b8322a; stroke-width: 2.5; }
@media (hover: hover) { .mf-muscle:hover .mf-shape { fill: rgba(255, 122, 69, 0.35); stroke: #b8322a; stroke-width: 2.5; } }
/* Chosen: glowing orange-red, see-through enough to keep the painted muscle visible, plus fibre lines and a light outline. */
.mf-muscle.is-selected .mf-shape { fill: var(--mf-chosen); fill-opacity: 0.8; stroke: #fff4ec; stroke-width: 3.5; }
.mf-muscle.is-selected .mf-glow, .mf-muscle.is-selected .mf-hatch { display: inline; }
.mf-muscle.is-selected.is-hover .mf-shape { fill: #d9401f; }
@media (hover: hover) { .mf-muscle.is-selected:hover .mf-shape { fill: #d9401f; } }
@media (prefers-reduced-motion: reduce) { .mf-muscle .mf-shape { transition: none; } }

/* ---- the page ---- */
.mp-page { display: grid; gap: 18px; }
.mp-page .card h2 { margin-top: 0; }
.mp-stepper { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.mp-stepper li button { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface, #fff); color: var(--primary); font-weight: 600; min-height: 40px; }
.mp-stepper li.active button { background: var(--primary); color: #fff; border-color: var(--primary); }
.mp-stepper li button:disabled { opacity: 0.5; cursor: not-allowed; }
.mp-step-number { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; border: 1px solid currentColor; font-size: 0.8rem; }
.mp-prefs { display: grid; gap: 18px; }
.mp-fieldset { border: 0; padding: 0; margin: 14px 0 0; }
.mp-fieldset legend { font-weight: 600; margin-bottom: 8px; }
.mp-goal-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.mp-choice { display: flex; flex-direction: column; gap: 4px; padding: 12px; border: 1px solid var(--border); border-radius: var(--radius-sm, 8px);
  cursor: pointer; min-height: 48px; background: var(--surface, #fff); }
.mp-choice input { position: absolute; opacity: 0; pointer-events: none; }
.mp-choice span { font-weight: 600; color: var(--primary); }
.mp-choice small { color: var(--muted, #5d6475); }
.mp-choice.active { border: 2px solid var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.mp-choice.active span::before { content: "✓ "; }
.mp-choice:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }
.mp-inline { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.mp-inline .mp-choice { flex-direction: row; min-width: 120px; }
.mp-field-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.mp-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }

.mp-select { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 18px; align-items: start; }
.mp-toolbar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; margin-bottom: 10px; }
.mp-segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.mp-segmented button { border: 0; background: transparent; padding: 8px 16px; min-height: 40px; font-weight: 600; color: var(--primary); cursor: pointer; }
.mp-segmented button.active { background: var(--primary); color: #fff; }
.mp-segmented button:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; }
.mp-figures { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; background: #f4efea; border-radius: var(--radius-md, 12px); padding: 8px; }
.mp-view { border-radius: 10px; overflow: hidden; }
.mp-view-label { text-align: center; margin: 0 0 4px; font-weight: 600; color: #3a3f47; letter-spacing: 0.04em; }
/* Wide screens show both sides; the Front/Back switch matters on phones. */
.mp-figures + .field-hint { margin-top: 10px; }
.mp-toolbar [aria-label] + [aria-label] { display: none; }
.mp-tooltip { position: absolute; z-index: 2; pointer-events: none; background: var(--primary); color: #fff; padding: 6px 10px;
  border-radius: 6px; font-size: 0.85rem; white-space: nowrap; box-shadow: var(--card-shadow); }
.mp-side h2 { display: flex; align-items: center; gap: 8px; }
.mp-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 10px; padding: 0; }
.mp-chip { display: inline-flex; align-items: center; gap: 4px; padding: 4px 4px 4px 12px; border-radius: 999px; background: #b8322a; color: #fff; font-weight: 600; }
.mp-chip-remove { border: 0; background: rgba(255, 255, 255, 0.2); color: #fff; width: 28px; height: 28px; border-radius: 50%; cursor: pointer; font-size: 1.1rem; line-height: 1; }
.mp-chip-remove:focus-visible { outline: 3px solid var(--accent); }
.mp-list-title { margin: 16px 0 4px; }
.mp-muscle-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 16px; }
.mp-group { border: 0; padding: 0; margin: 8px 0 0; }
.mp-group legend { padding: 0; }
.mp-group-toggle { font-weight: 700; }
.mp-muscle-option { display: flex; align-items: flex-start; gap: 8px; padding: 6px 0; min-height: 32px; cursor: pointer; font-size: 0.92rem; }
.mp-muscle-option input { flex: none; margin-top: 3px; width: 18px; height: 18px; }

.mp-summary { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; align-items: center; }
.mp-summary p { margin: 4px 0 0; color: var(--muted, #5d6475); }
.mp-notes ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; }
.mp-note.warning { color: #8a2a1c; }
/* The My Plan clash notice (same days / same exercises) and the fixes kept on the preferences step. */
.mp-clash { border-left: 4px solid #d98a1c; }
.mp-clash h2 { margin-bottom: 6px; }
.mp-clash p { margin: 4px 0; }
.mp-clash .mp-inline { margin-top: 10px; }
.mp-clash-choices { display: grid; gap: 6px; justify-items: start; margin-top: 10px; }
.mp-week-bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
.mp-days { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.mp-day h3 { margin: 0; }
.mp-day.rest { opacity: 0.85; }
.mp-day-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.mp-focus { margin: 4px 0 10px; color: var(--muted, #5d6475); }
.mp-exercises { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; counter-reset: mp; }
.mp-exercise { border-top: 1px solid var(--border); padding-top: 10px; display: grid; gap: 6px; }
.mp-exercise-main { display: grid; gap: 2px; }
.mp-targets { font-size: 0.88rem; color: var(--muted, #5d6475); }
.mp-progress { margin: 2px 0 0; font-size: 0.85rem; color: #2f6a3a; }
.mp-dose { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.mp-sets { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; }
.mp-sets .icon-button { width: 32px; height: 32px; font-size: 1.1rem; }
.mp-rest { font-size: 0.88rem; color: var(--muted, #5d6475); }
.mp-swap select { min-height: 36px; max-width: 220px; }
.mp-disclaimer { font-size: 0.85rem; }

@media (max-width: 960px) {
  .mp-select { grid-template-columns: 1fr; }
  .mp-goal-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .mp-field-row, .mp-muscle-list { grid-template-columns: 1fr; }
  .mp-toolbar [aria-label] + [aria-label] { display: inline-flex; }
  .mp-figures { grid-template-columns: 1fr; max-width: 300px; margin: 0 auto; }
  .mp-figures[data-view="front"] .mp-view-back, .mp-figures[data-view="back"] .mp-view-front { display: none; }
  .mp-days { grid-template-columns: 1fr; }
}
.mf-muscle { -webkit-tap-highlight-color: transparent; }
/* A saved plan (Community stage C5): its workouts can be logged on the Progress page. */
.mp-saved { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; border-left: 4px solid #2f8a4a; }
.mp-saved p { margin: 0; }
.mp-save-hint { margin: 0; }