.framing-lab {
    margin: 2rem 0;
    padding: 1.5rem;
    border: var(--border-subtle);
    border-radius: var(--radius-lg);
    background:
        radial-gradient(circle at bottom right, var(--accent-soft), transparent 40%),
        linear-gradient(180deg, var(--surface) 0%, var(--surface-muted) 100%);
    box-shadow: var(--shadow-sm);
}

.framing-lab__eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    background: var(--surface);
    border: var(--border-subtle);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-pill);
    margin-bottom: 0.75rem;
}

.framing-lab__title {
    font-family: var(--font-serif);
    font-size: clamp(1.25rem, 2vw, 1.55rem);
    line-height: 1.2;
    margin: 0 0 0.5rem;
    color: var(--text-primary);
}

.framing-lab__intro {
    color: var(--text-secondary);
    margin: 0 0 1.4rem;
}

.framing-lab__section {
    margin-bottom: 1.6rem;
}

.framing-lab__section-title {
    font-weight: var(--font-weight-bold);
    font-size: 0.95rem;
    color: var(--text-primary);
    margin: 0 0 0.6rem;
}

.framing-lab__tape-wrap {
    overflow-x: auto;
    padding-bottom: 0.3rem;
}

.framing-lab__tape {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 1rem 0.9rem;
    border-radius: var(--radius-md);
    background: var(--surface-contrast);
    font-family: var(--font-mono);
}

.framing-lab__byte {
    min-width: 2.1rem;
    height: 2.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-on-contrast);
    font-size: 0.95rem;
    font-weight: var(--font-weight-semibold);
    transition: background-color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}

.framing-lab__byte--header {
    background: var(--accent);
    color: var(--surface);
    font-size: 0.68rem;
    font-weight: var(--font-weight-bold);
    min-width: 2.6rem;
}

.framing-lab__byte.is-highlighted {
    background: var(--text-on-contrast);
    color: var(--surface-contrast);
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.framing-lab__byte--header.is-highlighted {
    background: var(--text-on-contrast);
    color: var(--surface-contrast);
}

.framing-lab__gap {
    appearance: none;
    border: none;
    background: transparent;
    width: 14px;
    height: 2.1rem;
    cursor: pointer;
    position: relative;
    flex: 0 0 auto;
}

.framing-lab__gap::before {
    content: "";
    position: absolute;
    top: 2px;
    bottom: 2px;
    left: 50%;
    width: 2px;
    transform: translateX(-50%);
    background: var(--text-on-contrast-muted);
    opacity: 0.35;
    border-radius: 2px;
    transition: opacity 150ms ease, background-color 150ms ease, width 150ms ease;
}

.framing-lab__gap:hover::before {
    opacity: 0.75;
}

.framing-lab__gap.is-active::before {
    opacity: 1;
    width: 3px;
    background: var(--accent);
}

.framing-lab__gap:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

.framing-lab__result {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: 0.9rem;
}

.framing-lab__result-chip {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: var(--border-subtle);
    color: var(--text-primary);
}

.framing-lab__result-chip strong {
    color: var(--text-secondary);
    font-weight: var(--font-weight-semibold);
    margin-right: 0.35rem;
}

.framing-lab__verdict {
    margin: 0.7rem 0 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-height: 1.4em;
}

.framing-lab__reveal {
    margin-top: 0.9rem;
}

.framing-lab__note {
    margin: 0.7rem 0 0;
    padding: 0.7rem 0.9rem;
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
    border: var(--border-subtle);
    color: var(--text-primary);
    font-size: 0.88rem;
    line-height: 1.5;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 200ms ease, transform 200ms ease;
}

.framing-lab__note.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.framing-lab__step-line {
    margin: 0.9rem 0 0;
    color: var(--text-primary);
    font-size: 0.92rem;
    line-height: 1.55;
    min-height: 3em;
}

.framing-lab__delivered-label {
    margin: 0.9rem 0 0.4rem;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.framing-lab__delivered {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    min-height: 2.1rem;
}

.framing-lab__delivered-chip {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: var(--font-weight-bold);
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius-pill);
    background: var(--accent);
    color: var(--surface);
}

.framing-lab__controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.framing-lab__button {
    appearance: none;
    font: inherit;
    font-size: 0.85rem;
    font-weight: var(--font-weight-semibold);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-pill);
    border: var(--border-subtle);
    background: var(--surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: transform 120ms ease, border-color 120ms ease, background-color 120ms ease, color 120ms ease;
}

.framing-lab__button:hover:not(:disabled) {
    transform: translateY(-1px);
    border-color: var(--accent);
}

.framing-lab__button:focus-visible {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

.framing-lab__button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.framing-lab__button--primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--surface);
}

.framing-lab__button--primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: var(--surface);
}

.framing-lab__step-count {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

@media (max-width: 600px) {
    .framing-lab__byte {
        min-width: 1.8rem;
        height: 1.8rem;
        font-size: 0.82rem;
    }

    .framing-lab__byte--header {
        min-width: 2.2rem;
        font-size: 0.6rem;
    }
}