/* ==========================================================================
   EKG Quiz — BEM styles, dark-only (V2 tokens only, no Tailwind).
   See ekg-plan.md §1/§4.1. Sections are filled in as each phase lands;
   Phase 1 only needs the monitor panel + gallery grid.
   ========================================================================== */

/* --- Monitor panel (shared by gallery + quiz runners) ------------------- */

.ekg-monitor {
    background: var(--v2-bg-secondary);
    border: 1px solid var(--v2-bg-tertiary);
    border-radius: 12px;
    padding: 0.75rem;
}

.ekg-monitor__bezel {
    background: #0a1420;
    border-radius: 8px;
    padding: 0.5rem;
    overflow: hidden;
}

.ekg-monitor__canvas {
    display: block;
    width: 100%;
    height: 160px;
    /* Canvas is a replaced element — once JS sets its width/height attributes
       (the backing-store resolution), that becomes an unshrinkable min-content
       floor for any ancestor grid/flex track, blowing layouts out past their
       container regardless of this width:100%. min-width:0 stops it. */
    min-width: 0;
}

.ekg-monitor__label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--v2-text-muted);
}

/* --- Controls ------------------------------------------------------------ */

.ekg-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.ekg-controls__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-width: 44px;
    min-height: 44px;
    padding: 0.4rem 0.75rem;
    background: var(--v2-bg-tertiary);
    color: var(--v2-text-secondary);
    border: 1px solid transparent;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
}

.ekg-controls__btn:hover {
    border-color: var(--v2-accent-blue);
    color: var(--v2-text-primary);
}

.ekg-controls__btn i,
.ekg-controls__btn svg {
    width: 16px;
    height: 16px;
}

/* --- Results page ----------------------------------------------------------- */

.ekg-results__score-wrap {
    position: relative;
    width: 140px;
    height: 140px;
    margin: 1rem auto 0;
}

.ekg-results__score-ring {
    transform: rotate(-90deg);
}

.ekg-results__score-ring-bg,
.ekg-results__score-ring-fill {
    fill: none;
    stroke-width: 10;
}

.ekg-results__score-ring-bg {
    stroke: var(--v2-bg-tertiary);
}

.ekg-results__score-ring-fill {
    stroke: var(--v2-accent-green);
    stroke-linecap: round;
}

.ekg-results__score-ring-fill--developing { stroke: var(--v2-accent-amber); }
.ekg-results__score-ring-fill--needs-review { stroke: var(--v2-accent-red); }

.ekg-results__score-label {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--v2-text-primary);
}

.ekg-results__summary {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--v2-text-primary);
    margin: 1rem 0 0.15rem;
}

.ekg-results__meta {
    text-align: center;
    font-size: 0.85rem;
    color: var(--v2-text-muted);
    margin: 0;
}

.ekg-results__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
    margin-top: 1.5rem;
}

.ekg-results__actions .nav-btn,
.ekg-results__actions .custom-quiz-builder__start {
    min-height: 48px;
    justify-content: center;
}

.ekg-results__action--secondary {
    display: inline-flex;
    align-items: center;
    padding: 0.65rem 1rem;
    border: 1px solid var(--v2-bg-tertiary);
    border-radius: 8px;
    background: var(--v2-bg-secondary);
    color: var(--v2-text-secondary);
    font-weight: 600;
}

.ekg-results__action--secondary:hover {
    border-color: var(--v2-accent-blue);
    color: var(--v2-text-primary);
}

.ekg-results__review-title {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.ekg-results__review-item {
    background: var(--v2-bg-secondary);
    border: 1px solid var(--v2-bg-tertiary);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.5rem;
}

.ekg-results__review-summary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--v2-text-secondary);
}

.ekg-results__review-icon--correct {
    color: var(--v2-accent-green);
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.ekg-results__review-icon--incorrect {
    color: var(--v2-accent-red);
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.ekg-results__review-body {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--v2-bg-tertiary);
    font-size: 0.85rem;
    color: var(--v2-text-muted);
}

.ekg-results__review-body p {
    margin: 0.25rem 0;
}

.ekg-results__criteria {
    margin: 0.6rem 0;
    padding-left: 1.1rem;
    color: var(--v2-text-secondary);
}

.ekg-results__teaching {
    padding: 0.6rem 0.75rem;
    border-left: 3px solid var(--v2-accent-blue);
    background: rgba(59, 130, 246, 0.08);
}

.ekg-feedback:focus {
    outline: none;
}

/* --- 12-lead panel layout -------------------------------------------------
   Panel arrangement is decoupled from waveform data (see js/ekg/ekg-layouts.js)
   — the same per-lead canvases just get re-parented into whichever grid shape
   the chosen print format needs. `--cols-N` modifiers cover every format's
   column count; `.ekg-12lead__grid` itself carries no column count so the
   On mobile, multi-column formats retain a clinically useful sheet width
   inside a horizontally pannable region; collapsing 12 leads into one column
   made learners scroll several thousand pixels before reaching the answer. */

.ekg-12lead__grid {
    display: grid;
    gap: 0.5rem;
}

.ekg-12lead-scroll {
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-gutter: stable;
    border-radius: 6px;
}

.ekg-12lead-scroll:focus-visible {
    outline: 2px solid var(--v2-accent-blue);
    outline-offset: 3px;
}

.ekg-12lead__grid--cols-1 { grid-template-columns: 1fr; }
.ekg-12lead__grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.ekg-12lead__grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
.ekg-12lead__grid--cols-6 { grid-template-columns: repeat(6, 1fr); }

.ekg-12lead__grid--cols-1 .ekg-12lead__panel-canvas {
    height: 110px;
}

.ekg-12lead__panel {
    min-width: 0;
    background: #0a1420;
    border: 1px solid var(--v2-bg-tertiary);
    border-radius: 6px;
    padding: 0.35rem;
}

.ekg-12lead__panel-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--v2-text-muted);
    margin-bottom: 0.15rem;
}

.ekg-12lead__panel-canvas {
    display: block;
    width: 100%;
    height: 90px;
    min-width: 0;
}

.ekg-12lead__rhythm-strip {
    grid-column: 1 / -1;
    margin-top: 0.5rem;
}

.ekg-12lead__rhythm-strip .ekg-12lead__panel-canvas {
    height: 110px;
}

@media (max-width: 480px) {
    .ekg-12lead__grid:not(.ekg-12lead__grid--cols-1) {
        min-width: 780px;
    }

    .ekg-12lead__panel-canvas {
        height: 82px;
    }
}

/* --- 12-lead format selector ------------------------------------------------
   Segmented control for choosing which print format re-arranges the same
   underlying lead data (standard 4x3, Cabrera sequence, compact 6x2, etc). */

.ekg-layout-select {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.6rem;
}

.ekg-layout-select__btn {
    min-width: 44px;
    min-height: 44px;
    padding: 0.35rem 0.7rem;
    background: var(--v2-bg-tertiary);
    color: var(--v2-text-secondary);
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
}

.ekg-layout-select__btn:hover {
    border-color: var(--v2-accent-blue);
    color: var(--v2-text-primary);
}

.ekg-layout-select__btn--active {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--v2-accent-blue);
    color: var(--v2-text-primary);
}

.ekg-layout-select__hint {
    display: block;
    font-size: 0.78rem;
    color: var(--v2-text-muted);
    margin-bottom: 0.75rem;
}

/* Auto-fit gain indicator (12-lead). The renderer picks a uniform clinical
   gain (10/5/2.5 mm/mV) per case so real voltages don't clip; this label
   states which gain is active so the amplitude scale is never ambiguous. */
.ekg-gain-label {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--v2-accent-cyan, #06b6cd);
    background: rgba(6, 182, 212, 0.10);
    border: 1px solid rgba(6, 182, 212, 0.25);
    border-radius: 4px;
    padding: 0.1rem 0.45rem;
    margin-left: 0.4rem;
    vertical-align: middle;
    white-space: nowrap;
}

.ekg-gain-label:empty {
    display: none;
}

/* --- Mode-select page (index.html) ----------------------------------------- */

.ekg-mode-card--selected {
    border-color: var(--v2-accent-blue);
    background: rgba(59, 130, 246, 0.08);
}

/* --- Quiz runner (rhythm.html / twelve-lead.html) -------------------------
   Reuses the main quiz system's .answer-option / .answer-options /
   .recall-rating-bar / .recall-btn / .question-card / .progress-bar-*
   classes from quiz-v3.css — do not redefine those here. This section is
   only the EKG-specific additions: real <button> answer options (a11y fix
   vs. the main quiz's div-based ones, ekg-plan.md Step 5.2), and the
   criteria/teaching-point/pitfall feedback panel. */

.ekg-runner .answer-option {
    /* .answer-option in quiz-v3.css is styled as a div; using a real
       <button> here (Step 5.2) needs the UA button font/alignment reset. */
    font: inherit;
    color: inherit;
    text-align: left;
    width: 100%;
}

.ekg-feedback {
    margin-top: 1rem;
    scroll-margin-top: 5rem;
}

.ekg-feedback__result {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.9rem;
    border-radius: 8px;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.ekg-feedback__result--correct {
    background: rgba(16, 185, 129, 0.12);
    color: var(--v2-accent-green);
}

.ekg-feedback__result--incorrect {
    background: rgba(239, 68, 68, 0.12);
    color: var(--v2-accent-red);
}

.ekg-feedback__result i,
.ekg-feedback__result svg {
    width: 20px;
    height: 20px;
}

.ekg-feedback__didactic-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.75rem;
    padding: 0.5rem 0.9rem;
    background: var(--v2-bg-tertiary);
    color: var(--v2-accent-blue);
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
}

.ekg-feedback__didactic-link:hover {
    background: var(--v2-accent-blue);
    color: white;
}

.ekg-feedback__didactic-link i,
.ekg-feedback__didactic-link svg {
    width: 16px;
    height: 16px;
}

/* --- QA gallery ----------------------------------------------------------- */

.ekg-gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.25rem;
}

.ekg-gallery__card {
    min-width: 0;
    background: var(--v2-bg-secondary);
    border: 1px solid var(--v2-bg-tertiary);
    border-radius: 12px;
    padding: 1rem;
}

.ekg-gallery__card--wide {
    grid-column: 1 / -1;
}

.ekg-gallery__card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.ekg-gallery__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--v2-text-primary);
    margin: 0 0 0.15rem 0;
}

.ekg-gallery__meta {
    font-size: 0.78rem;
    color: var(--v2-text-muted);
    text-transform: capitalize;
}

.ekg-gallery__badge {
    flex-shrink: 0;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    white-space: nowrap;
}

.ekg-gallery__badge--unreviewed {
    background: rgba(245, 158, 11, 0.15);
    color: var(--v2-accent-amber);
}

.ekg-gallery__badge--reviewed {
    background: rgba(16, 185, 129, 0.15);
    color: var(--v2-accent-green);
}

.ekg-gallery__criteria {
    margin: 0.75rem 0 0 0;
    padding-left: 1.1rem;
    font-size: 0.85rem;
    color: var(--v2-text-secondary);
}

.ekg-gallery__criteria li {
    margin-bottom: 0.2rem;
}

.ekg-gallery__notes {
    margin-top: 0.75rem;
    padding: 0.6rem 0.75rem;
    background: rgba(59, 130, 246, 0.08);
    border-left: 3px solid var(--v2-accent-blue);
    border-radius: 4px;
    font-size: 0.78rem;
    color: var(--v2-text-muted);
}

.ekg-gallery__error {
    padding: 2rem;
    text-align: center;
    color: var(--v2-text-muted);
}

@media (max-width: 480px) {
    .ekg-gallery__grid {
        grid-template-columns: 1fr;
    }
}

/* --- Image-mode rendering (static tracing scans) ---------------------------
   When a quiz case provides `image` instead of `waveform`, the renderer
   displays a static <img> inside the monitor bezel. These styles make it
   responsive, preserve aspect ratio, and hide the non-applicable waveform
   controls (play/pause, gain, calibration, layout selector).              */

.ekg-monitor__image {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

/* Wrapper provides the relative-positioned box that callouts overlay. In a
   grid context (12-lead grid) it spans all columns so the image fills the
   full row width rather than being forced into a single panel cell.       */
.ekg-image-wrapper {
    position: relative;
    display: block;
    grid-column: 1 / -1;
}

.ekg-image-wrapper--error {
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    border: 1px dashed var(--v2-accent-red);
    border-radius: 6px;
}

.ekg-image-error {
    margin: 0;
    color: var(--v2-accent-red);
    text-align: center;
    font-size: 0.9rem;
}

/* Callout layer — an absolutely-positioned overlay matching the wrapper's
   dimensions, so its children's percentage left/top align with the image. */
.ekg-callout__layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

/* A single callout marker — an anchored dot + optional label. Positioned by
   inline left/top percentages set by the renderer.                        */
.ekg-callout {
    position: absolute;
    transform: translate(-50%, -50%);
}

.ekg-callout__dot {
    display: block;
    width: 12px;
    height: 12px;
    background: var(--v2-accent-cyan, #06b6d4);
    border: 2px solid var(--v2-bg-primary);
    border-radius: 50%;
    box-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
}

.ekg-callout__label {
    position: absolute;
    top: -1.6rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--v2-text-primary);
    background: rgba(6, 182, 212, 0.90);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    white-space: nowrap;
    line-height: 1.3;
}

/* In image mode the static tracing has no sweep, so waveform-specific UI
   controls are irrelevant — hide them to avoid learner confusion.         */
body.image-mode .ekg-controls,
body.image-mode #gainLabel,
body.image-mode .ekg-gain-label,
body.image-mode .ekg-layout-select,
body.image-mode .ekg-layout-select__hint,
body.image-mode .ekg-monitor__label {
    display: none !important;
}

/* Prevent the bezel from collapsing while the static image loads by giving
   it a minimum height comparable to the canvas it replaced.               */
body.image-mode .ekg-monitor__bezel {
    min-height: 120px;
}

body.image-mode .ekg-12lead-scroll {
    overflow: visible;
}

body.image-mode .ekg-12lead__grid {
    min-width: 0;
}
/* Schema-v2 structured interpretation */
.ekg-assessment {
    display: grid;
    gap: 1rem;
}

.ekg-assessment__component {
    min-width: 0;
    margin: 0;
    padding: 1rem;
    border: 1px solid #334155;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.55);
}

.ekg-assessment__label {
    padding: 0 0.35rem;
    color: #f1f5f9;
    font-weight: 700;
}

.ekg-assessment__choice {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    min-height: 44px;
    margin-top: 0.5rem;
    padding: 0.65rem 0.8rem;
    border: 1px solid #334155;
    border-radius: 9px;
    color: #e2e8f0;
    cursor: pointer;
}

.ekg-assessment__choice:focus-within {
    outline: 2px solid #60a5fa;
    outline-offset: 2px;
}

.ekg-assessment__choice input {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
}

.ekg-assessment__error {
    min-height: 1.25rem;
    margin: 0;
    color: #fca5a5;
}

.ekg-component-feedback {
    padding: 0.75rem;
    border-left: 3px solid #3b82f6;
}

.ekg-calipers-active {
    cursor: crosshair;
}

#caliperReadout {
    min-width: 9rem;
    color: #bfdbfe;
    font-variant-numeric: tabular-nums;
}

@media (max-width: 600px) {
    .ekg-assessment__component {
        padding: 0.75rem;
    }
}