/* ==========================================================================
   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;
    }
}

/* EKG practice room: shared portal, tracing workspace, and review surfaces. */
.ekg-portal, .ekg-session, .ekg-review { --ekg-border: #334155; --ekg-surface: #182538; --ekg-highlight: #67e8c5; max-width: 1220px; margin: 0 auto; padding: 32px 24px 64px; }
.ekg-portal [hidden], .ekg-session [hidden], .ekg-review [hidden], .ekg-session-header [hidden] { display: none !important; }
.ekg-portal h1 { font-size: clamp(2rem, 3.8vw, 3.2rem); letter-spacing: -.04em; line-height: 1.15; margin: 8px 0 16px; }
.ekg-portal h2, .ekg-review h2 { font-size: 1.4rem; letter-spacing: -.02em; margin: 6px 0 12px; }
.ekg-eyebrow { color: #8ba7b8; font-size: .68rem; font-weight: 700; letter-spacing: .13em; margin: 0; }
.ekg-lede { max-width: 650px; color: #b7c8d8; font-size: 1.04rem; line-height: 1.7; margin: 0; }
.ekg-portal__heading, .ekg-section-heading { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.ekg-section-heading { margin-bottom: 22px; }
.ekg-portal-nav { display: flex; gap: 28px; border-bottom: 1px solid #334155; margin: 30px 0 28px; overflow-x: auto; }
.ekg-portal-nav a { color: #9fb2c8; padding: 14px 0; text-decoration: none; flex-shrink: 0; font-size: .9rem; }
.ekg-portal-nav a[aria-current] { color: #67e8c5; border-bottom: 2px solid #67e8c5; }
.ekg-portal__workspace { display: grid; grid-template-columns: minmax(0, 1.85fr) minmax(260px, 1fr); gap: 24px; }
.ekg-panel { background: #182538; border: 1px solid #334155; border-radius: 16px; padding: 28px; min-width: 0; }
.ekg-tag { display: inline-flex; align-items: center; color: #aadbd2; background: #173b3e; border: 1px solid #2b5559; border-radius: 5px; padding: 4px 8px; font-size: .7rem; font-weight: 600; flex-shrink: 0; }
.ekg-track-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 26px; }
.ekg-track { color: #e9f3f5; text-align: left; display: flex; flex-direction: column; align-items: flex-start; gap: 10px; background: #111d2e; border: 1px solid #3a4b61; border-radius: 12px; padding: 20px; cursor: pointer; font: inherit; }
.ekg-track i, .ekg-track svg { width: 26px; height: 26px; color: #7dddc5; margin-bottom: 4px; }
.ekg-track strong { font-size: .96rem; line-height: 1.4; }
.ekg-track span { font-size: .8rem; color: #afc1d2; }
.ekg-track small { font-size: .72rem; color: #7dddc5; }
.ekg-track.is-selected { border-color: #67e8c5; background: #173139; box-shadow: inset 0 0 0 1px #67e8c5; }
.ekg-field { display: block; border: 0; padding: 0; margin: 0 0 22px; font-size: .85rem; font-weight: 600; min-width: 0; }
.ekg-field legend { margin-bottom: 10px; }
.ekg-field select, .ekg-search input { width: 100%; min-height: 44px; border: 1px solid #475569; background: #101c2e; color: #e2e8f0; border-radius: 8px; font: inherit; padding: 10px 12px; }
.ekg-field select { margin-top: 10px; }
.ekg-builder__fields { display: grid; grid-template-columns: 1.3fr 1fr; gap: 16px; }
.ekg-segments { display: flex; flex-wrap: wrap; gap: 8px; }
.ekg-segments button { min-height: 44px; border: 1px solid #475569; border-radius: 8px; padding: 10px 16px; background: #111d2e; color: #b7c8d8; font: inherit; font-size: .8rem; cursor: pointer; }
.ekg-segments button[aria-pressed="true"] { background: #214b4c; color: #c8fff0; border-color: #67e8c5; }
.ekg-hint { color: #adbdcf; font-size: .8rem; line-height: 1.65; font-weight: 400; margin: 8px 0; }
.ekg-launch { display: flex; gap: 20px; align-items: center; justify-content: space-between; padding-top: 8px; border-top: 1px solid #334155; }
.ekg-primary { background: #77eed0; color: #092c2c; border: 1px solid transparent; border-radius: 9px; padding: 13px 20px; font: inherit; font-size: .88rem; font-weight: 700; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 10px; cursor: pointer; min-height: 46px; }
.ekg-primary:hover { background: #a2f9e1; color: #092c2c; }
.ekg-primary:disabled { opacity: .45; cursor: default; }
.ekg-primary i, .ekg-primary svg, .ekg-text-link i, .ekg-text-link svg, .ekg-history-row i, .ekg-history-row svg { width: 17px; height: 17px; flex-shrink: 0; }
.ekg-text-link { display: inline-flex; align-items: center; gap: 8px; font-size: .82rem; color: #91ddda; text-decoration: none; min-height: 44px; }
.ekg-next-step { background: #102831; border-color: #29434d; height: auto; }
.ekg-next-step > i, .ekg-next-step > svg { width: 32px; height: 32px; color: #77eed0; margin-bottom: 22px; }
.ekg-next-step h2 { font-size: 1.5rem; margin: 12px 0 24px; }
.ekg-next-step ol { padding-left: 22px; color: #c9dce4; font-size: .9rem; line-height: 1.65; }
.ekg-next-step li { padding: 0 0 12px 4px; }
.ekg-next-step p:not(.ekg-eyebrow) { font-size: .8rem; color: #a2bbc4; line-height: 1.7; }
.ekg-practice-aside .ekg-beta-notice { margin-top: 18px; }
.ekg-progress-section, #topic-library { margin-top: 42px; scroll-margin-top: 120px; }
.ekg-stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.ekg-stat { padding: 22px; border: 1px solid #334155; border-radius: 12px; background: #142134; }
.ekg-stat strong { display: block; font-size: 1.8rem; letter-spacing: -.04em; line-height: 1.4; color: #e2f2f4; }
.ekg-stat span { color: #a9bbce; font-size: .76rem; }
.ekg-history-row { display: flex; justify-content: space-between; gap: 20px; color: #dceaf4; text-decoration: none; padding: 16px 0; border-top: 1px solid #334155; }
.ekg-history-row small { display: block; color: #9fb4c8; margin-top: 5px; }
.ekg-history-row > strong { display: flex; align-items: center; gap: 12px; }
.ekg-resume { background: #173839; border: 1px solid #3c6d67; padding: 24px; border-radius: 14px; display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-bottom: 24px; }
.ekg-resume p:last-child { margin-bottom: 0; color: #bcd9d6; font-size: .85rem; }
.ekg-topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.ekg-topic-card { display: flex; align-items: center; justify-content: space-between; gap: 16px; background: #142134; border: 1px solid #334155; border-radius: 10px; padding: 18px; color: #d7e7ef; text-align: left; cursor: pointer; font: inherit; }
.ekg-topic-card:hover { border-color: #67e8c5; }
.ekg-topic-card strong { font-size: .82rem; line-height: 1.4; display: block; }
.ekg-topic-card small { color: #91aabf; display: block; margin-top: 8px; }
.ekg-topic-card i, .ekg-topic-card svg { width: 18px; height: 18px; color: #7bb6b6; flex-shrink: 0; }
.ekg-search { display: flex; align-items: center; gap: 10px; max-width: 240px; }
.ekg-search i, .ekg-search svg { width: 18px; height: 18px; color: #9fb4c8; }
.ekg-notice { border: 1px solid #44636c; background: #142e3d; color: #c7dde7; padding: 14px; border-radius: 9px; font-size: .85rem; line-height: 1.6; margin-bottom: 18px; }
.ekg-error { color: #fda4af; font-size: .85rem; }
.ekg-error:empty { display: none; }
.ekg-education-note { color: #a1b3c6; font-size: .76rem; line-height: 1.7; margin: 32px 0 0; }
.ekg-session-header { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 12px max(24px, calc((100vw - 1340px) / 2)); background: #152236; border-bottom: 1px solid #334155; }
.ekg-session-header strong { font-size: .9rem; }
.ekg-session-header > span { color: #9fbfc2; font-size: .72rem; text-align: right; }
.ekg-session { max-width: 1380px; }
.ekg-session-progress { display: flex; justify-content: space-between; gap: 16px; font-size: .8rem; color: #bbcedb; margin-bottom: 12px; }
.ekg-session .progress-bar { height: 5px; margin-bottom: 24px; }
.ekg-session .progress-bar-fill { background: #67e8c5; }
.ekg-session-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(310px, 1fr); gap: 22px; align-items: start; }
.ekg-viewer-panel { padding: 22px; }
.ekg-tracing-scroll { overflow: auto; border: 1px solid #304054; border-radius: 8px; background: #0a1420; position: relative; }
.ekg-tracing-scroll:fullscreen { padding: 20px; }
.ekg-practice-canvas { height: 260px; display: block; max-width: none !important; }
.ekg-tracing-meta { font-size: .68rem; color: #acbccd; line-height: 1.6; margin: 10px 0; }
.ekg-session .ekg-controls { margin: 14px 0 0; gap: 6px; }
.ekg-session .ekg-controls__btn { min-height: 44px; background: #22354b; font-size: .75rem; color: #d1e2eb; }
.ekg-session .ekg-controls__btn[aria-pressed="true"] { border: 1px solid #67e8c5; }
#caliperReadout { flex-basis: 100%; font-size: .8rem; color: #9ee7d7; }
.ekg-reading-guide { border-top: 1px solid #334155; margin-top: 18px; padding-top: 16px; font-size: .82rem; color: #adc2d1; }
.ekg-reading-guide summary { cursor: pointer; min-height: 30px; }
.ekg-reading-guide p { line-height: 1.7; }
.ekg-answer-panel h1 { font-size: 1.3rem; line-height: 1.45; letter-spacing: -.02em; margin: 14px 0 8px; }
.ekg-answer-panel .answer-options { margin-top: 20px; gap: 10px; }
.ekg-answer-panel .answer-option { display: flex; align-items: center; gap: 12px; padding: 14px; min-height: 58px; font-size: .85rem; border-width: 1px; border-radius: 9px; background: #101c2e; }
.ekg-answer-panel .answer-option.selected { border-color: #67e8c5; background: #193d42; }
.ekg-answer-panel .answer-option.correct { border-color: #67e8c5; background: #164537; }
.ekg-answer-panel .answer-option.incorrect { border-color: #fda4af; background: #442b38; }
.ekg-option-number { flex-shrink: 0; display: grid; place-items: center; width: 26px; height: 26px; background: #25354b; border-radius: 5px; font-size: .75rem; }
.ekg-confidence { border: 0; padding: 0; margin: 22px 0; }
.ekg-confidence legend { color: #cad9e5; font-size: .78rem; margin-bottom: 10px; }
.ekg-confidence legend span { color: #8fa9bd; margin-left: 8px; }
.ekg-confidence .ekg-segments button { font-size: .72rem; padding: 8px 12px; }
.ekg-answer-panel > .ekg-primary, #nextArea .ekg-primary { width: 100%; margin-top: 14px; }
.ekg-keyboard-hint { font-size: .65rem; color: #99b0c4; margin: 18px 0 0; line-height: 1.6; }
.ekg-session .ekg-feedback { margin-top: 20px; padding: 16px 0 0; background: none; border-top: 1px solid #334155; }
.ekg-feedback h3 { font-size: 1.05rem; margin: 12px 0; }
.ekg-feedback h4 { font-size: .82rem; margin: 18px 0 10px; }
.ekg-feedback ul { font-size: .8rem; color: #c2d2df; line-height: 1.7; padding-left: 20px; }
.ekg-feedback li { margin-bottom: 8px; }
.ekg-feedback__result { display: flex; align-items: center; gap: 10px; }
.ekg-feedback__result i, .ekg-feedback__result svg { width: 21px; height: 21px; }
.ekg-component-feedback { padding: 12px 0; border-bottom: 1px solid #334155; font-size: .8rem; }
.ekg-loading { min-height: 220px; display: grid; place-items: center; }
.ekg-review { max-width: 1100px; }
.ekg-review-hero { display: flex; justify-content: space-between; align-items: center; gap: 28px; margin-bottom: 24px; }
.ekg-review-score { color: #9cf0d7; font-size: clamp(3rem, 8vw, 5rem); letter-spacing: -.06em; line-height: 1; }
.ekg-review-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0 32px; }
.ekg-review-item { border: 1px solid #334155; border-radius: 12px; margin-bottom: 12px; background: #142134; }
.ekg-review-item > summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 20px; color: #dcebf1; cursor: pointer; }
.ekg-review-item > summary span { font-size: .85rem; }
.ekg-review-body { padding: 0 22px 22px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 24px; }
.ekg-review-body .ekg-feedback { padding: 0; margin: 0; }
.ekg-review-tracing { min-width: 0; }
.ekg-review-filter { margin-bottom: 22px; }
.ekg-portal button:focus-visible, .ekg-session button:focus-visible, .ekg-review button:focus-visible, .ekg-portal a:focus-visible, .ekg-session a:focus-visible, .ekg-review a:focus-visible, .ekg-tracing-scroll:focus-visible { outline: 3px solid #67e8c5; outline-offset: 4px; }
@media (min-width: 1000px) { .ekg-session .ekg-viewer-panel { position: sticky; top: 20px; } }
@media (max-width: 999px) { .ekg-session-grid { grid-template-columns: 1fr; } .ekg-portal__workspace { grid-template-columns: 1fr; } .ekg-practice-aside { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; } .ekg-review-body { grid-template-columns: 1fr; } }
@media (max-width: 600px) {
    .ekg-portal, .ekg-session, .ekg-review { padding: 22px 14px 90px; }
    .ekg-portal__heading { display: block; } .ekg-portal__heading .ekg-text-link { margin-top: 12px; }
    .ekg-panel { padding: 20px; } .ekg-track { padding: 14px; gap: 8px; } .ekg-track strong { font-size: .85rem; }
    .ekg-track span { font-size: .72rem; } .ekg-builder__fields { grid-template-columns: 1fr; gap: 0; }
    .ekg-launch { align-items: stretch; flex-direction: column; gap: 8px; } .ekg-practice-aside { display: block; }
    .ekg-next-step { display: none; } .ekg-stat-grid { grid-template-columns: 1fr 1fr; gap: 10px; } .ekg-stat { padding: 18px; }
    .ekg-topic-grid { grid-template-columns: 1fr; } .ekg-resume { flex-direction: column; align-items: stretch; }
    .ekg-section-heading { gap: 12px; flex-wrap: wrap; } .ekg-section-heading .ekg-search { max-width: none; width: 100%; }
    .ekg-session-header { padding: 10px 14px; flex-wrap: wrap; gap: 6px 12px; } .ekg-session-header > span { width: 100%; text-align: left; }
    .ekg-session-header strong { font-size: .72rem; } .ekg-session-progress { font-size: .7rem; gap: 8px; }
    .ekg-session-grid { gap: 14px; } .ekg-viewer-panel { padding: 14px; } .ekg-practice-canvas { height: 220px; }
    .ekg-answer-panel { padding: 20px 16px; } .ekg-keyboard-hint { display: none; }
    .ekg-review-hero { align-items: flex-start; } .ekg-review-body { padding: 0 16px 20px; }
    .ekg-review-item > summary { padding: 16px; } .ekg-review-actions > * { flex: 1 1 100%; }
}
@media (prefers-reduced-motion: reduce) { .ekg-session *, .ekg-portal *, .ekg-review * { scroll-behavior: auto !important; transition: none !important; animation: none !important; } }
.ekg-answer-panel .answer-option { color: #e2e8f0; }
.ekg-option-number { color: #c4d8e6; }
/* Override the shared chart rule so canvas CSS and drawing coordinates agree. */
.ekg-tracing-scroll .ekg-practice-canvas { height: max(260px, var(--ekg-min-trace-height, 100px)) !important; }
.ekg-tracing-scroll .ekg-12lead__panel-canvas { height: max(100px, var(--ekg-min-trace-height, 100px)) !important; }
.ekg-tracing-scroll .ekg-12lead__rhythm-strip .ekg-12lead__panel-canvas { height: max(100px, var(--ekg-min-trace-height, 100px)) !important; }
.ekg-tracing-scroll .ekg-12lead__grid { min-width: 1080px; }
.ekg-tracing-scroll .ekg-12lead__grid--cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ekg-feedback__result--incorrect { color: #fda4af; }
.ekg-reasoning-check { margin: 20px 0; padding: 16px; border: 1px solid #35514f; border-radius: 12px; background: #142c2c; }
.ekg-reasoning-check h4 { margin-top: 0; }
.ekg-feedback details > summary { cursor: pointer; padding: 10px 0; color: #9eecd5; font-weight: 600; }
.ekg-feedback details > summary:focus-visible { outline: 3px solid #67e8c5; outline-offset: 3px; }
.ekg-feedback-references { margin: 16px 0; overflow-wrap: anywhere; }
.ekg-feedback-references li + li { margin-top: 12px; }
@media (max-width: 600px) { .ekg-tracing-scroll .ekg-practice-canvas { height: max(220px, var(--ekg-min-trace-height, 100px)) !important; } }