.bass-page {
    background:
        radial-gradient(circle at 50% 14rem, color-mix(in srgb, var(--color-cyan) 5%, transparent), transparent 28rem),
        var(--color-background);
}

.bass-test-page {
    overflow: clip;
}

.bass-hero {
    padding-block: clamp(var(--space-8), 4vw, var(--space-12)) var(--space-6);
}

.bass-hero__inner {
    display: grid;
    justify-items: center;
    text-align: center;
}

.bass-hero__eyebrow,
.bass-section-kicker {
    color: var(--color-mint);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.bass-hero h1 {
    max-width: 19ch;
    margin-block-start: var(--space-3);
    font-size: clamp(2.25rem, 4.1vw, 4rem);
}

.bass-hero__support {
    max-width: 65ch;
    margin-block-start: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

.bass-hero__nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-4);
    margin-block-start: var(--space-5);
}

.bass-hero__nav a {
    color: var(--color-mint);
    font-size: var(--text-sm);
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

.bass-hero__nav a:focus-visible {
    outline: 2px solid var(--color-mint);
    outline-offset: 4px;
}

.bass-primary {
    padding-block: clamp(var(--space-8), 4vw, var(--space-12));
}

.bass-console {
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--color-cyan) 26%, var(--color-border));
    border-radius: var(--radius-xl);
    background: linear-gradient(180deg, color-mix(in srgb, var(--color-cyan) 3%, var(--color-surface-elevated)), var(--color-surface));
    box-shadow: 0 22px 64px rgb(0 0 0 / 0.34);
}

.bass-console__header,
.bass-console__footer,
.bass-module__header,
.bass-module__inner,
.bass-sweep-readout,
.bass-sweep-controls,
.session-notes__actions {
    display: flex;
    align-items: center;
}

.bass-console__header {
    justify-content: space-between;
    gap: var(--space-6);
    padding: var(--space-5, 1.25rem) var(--space-6);
    border-block-end: 1px solid var(--color-border);
}

.bass-console__title,
.bass-module__header {
    min-width: 0;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: var(--space-4);
}

.bass-console__asset {
    width: 3.25rem;
    height: 3.25rem;
    display: grid;
    place-items: center;
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--color-mint) 10%, var(--color-surface));
}

.bass-console__asset img {
    width: 2.5rem;
    height: 2.5rem;
    object-fit: contain;
}

.bass-console__title h2,
.bass-module__header h2 {
    max-width: none;
    font-size: clamp(1.4rem, 2.1vw, 2rem);
}

.bass-console__title p,
.bass-module__header p {
    margin-block-start: var(--space-1);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.bass-console__title p {
    max-width: 64ch;
}

.bass-module__header p {
    max-width: none;
}

.bass-module__guidance {
    margin-block-start: var(--space-4);
    padding-block-start: var(--space-3);
    display: grid;
    gap: var(--space-2);
    border-block-start: 1px solid var(--color-border);
}

.bass-module__header .bass-module__guidance p {
    max-width: none;
    margin: 0;
    display: grid;
    grid-template-columns: 6.8rem minmax(0, 1fr);
    gap: var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    line-height: 1.55;
}

.bass-module__guidance strong {
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.bass-module__guidance p:last-child strong {
    color: var(--color-cyan);
}

.bass-console__state {
    min-height: 2.5rem;
    padding: var(--space-2) var(--space-3);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    white-space: nowrap;
}

.bass-console__state-dot,
.bass-transport__pulse {
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    background: var(--color-text-secondary);
}

.bass-test-page[data-playing="true"] .bass-console__state-dot,
.bass-test-page[data-playing="true"] .bass-transport__pulse {
    background: var(--color-mint);
    box-shadow: 0 0 0 0.3rem color-mix(in srgb, var(--color-mint) 14%, transparent);
}

.bass-frequency-display {
    min-height: 9.5rem;
    position: relative;
    display: grid;
    place-items: center;
    text-align: center;
}

.bass-frequency-display > div {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--space-2);
}

.bass-frequency-display strong {
    font-family: var(--font-measurement);
    font-size: clamp(3.25rem, 7vw, 5.6rem);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: -0.04em;
    line-height: 0.92;
    font-variant-numeric: tabular-nums;
}

.bass-frequency-display > div span {
    color: var(--color-cyan);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-bold);
}

.bass-frequency-display > small {
    position: absolute;
    inset-block-end: var(--space-4);
    color: var(--color-text-secondary);
    font-size: 0.68rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.14em;
}

.bass-frequency-display__rings {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    overflow: hidden;
}

.bass-frequency-display__rings i {
    position: absolute;
    width: 8rem;
    height: 8rem;
    border: 1px solid color-mix(in srgb, var(--color-cyan) 26%, transparent);
    border-radius: 50%;
    opacity: 0.3;
}

.bass-frequency-display__rings i:nth-child(2) { width: 17rem; height: 17rem; opacity: 0.18; }
.bass-frequency-display__rings i:nth-child(3) { width: 28rem; height: 28rem; opacity: 0.1; }

.bass-test-page[data-playing="true"] .bass-frequency-display__rings i {
    animation: bass-pulse 2.4s ease-out infinite;
}

.bass-test-page[data-playing="true"] .bass-frequency-display__rings i:nth-child(2) { animation-delay: 0.35s; }
.bass-test-page[data-playing="true"] .bass-frequency-display__rings i:nth-child(3) { animation-delay: 0.7s; }

.bass-preset-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    border-block: 1px solid var(--color-border);
}

.bass-preset-grid button,
.extension-steps button,
.crossover-presets button {
    min-width: 0;
    min-height: 4.5rem;
    padding: var(--space-3) var(--space-2);
    display: grid;
    place-items: center;
    align-content: center;
    gap: 0.1rem;
    border: 0;
    border-inline-end: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text);
    cursor: pointer;
}

.bass-preset-grid button:last-child,
.extension-steps button:last-child,
.crossover-presets button:last-child {
    border-inline-end: 0;
}

.bass-preset-grid button:hover,
.extension-steps button:hover,
.crossover-presets button:hover {
    background: color-mix(in srgb, var(--color-cyan) 6%, transparent);
}

.bass-preset-grid button[aria-pressed="true"],
.bass-preset-grid button[data-selected="true"],
.bass-preset-grid button[aria-current="true"],
.extension-steps button[aria-pressed="true"],
.crossover-presets button[aria-pressed="true"] {
    background: color-mix(in srgb, var(--color-mint) 11%, var(--color-surface));
    color: var(--color-mint);
    box-shadow: inset 0 -2px 0 var(--color-mint);
}

.bass-preset-grid strong,
.extension-steps strong,
.crossover-presets strong {
    font-family: var(--font-measurement);
    font-size: var(--text-lg);
    font-variant-numeric: tabular-nums;
}

.bass-preset-grid small,
.extension-steps small,
.crossover-presets small {
    color: var(--color-text-secondary);
    font-size: 0.68rem;
}

.bass-console__footer {
    display: grid;
    grid-template-columns: minmax(18rem, 1.65fr) auto minmax(13rem, 0.8fr) auto;
    gap: var(--space-5, 1.25rem);
    padding: var(--space-5, 1.25rem) var(--space-6);
    background: color-mix(in srgb, var(--color-background) 34%, var(--color-surface));
}

.bass-frequency-control,
.bass-output-level,
.bass-sweep-controls label,
.room-compare label,
.session-notes label {
    min-width: 0;
    display: grid;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
}

.bass-frequency-control > span:first-child,
.bass-output-level > span {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
}

.bass-frequency-control strong,
.bass-output-level strong {
    color: var(--color-text);
}

.bass-frequency-control output,
.bass-output-level output {
    color: var(--color-cyan);
    font-family: var(--font-measurement);
    font-weight: var(--font-weight-bold);
    font-variant-numeric: tabular-nums;
}

.bass-frequency-control input,
.bass-output-level input,
.rattle-control > input {
    width: 100%;
    height: 1.5rem;
    margin: 0;
    appearance: none;
    background: transparent;
    cursor: pointer;
}

.bass-frequency-control input::-webkit-slider-runnable-track,
.bass-output-level input::-webkit-slider-runnable-track,
.rattle-control > input::-webkit-slider-runnable-track {
    height: 0.3rem;
    border-radius: var(--radius-pill);
    background: linear-gradient(90deg, var(--color-mint) var(--frequency-percent, var(--level-percent, 0%)), var(--color-border) var(--frequency-percent, var(--level-percent, 0%)));
}

.bass-frequency-control input::-moz-range-track,
.bass-output-level input::-moz-range-track,
.rattle-control > input::-moz-range-track {
    height: 0.3rem;
    border-radius: var(--radius-pill);
    background: var(--color-border);
}

.bass-frequency-control input::-moz-range-progress,
.bass-output-level input::-moz-range-progress,
.rattle-control > input::-moz-range-progress {
    height: 0.3rem;
    border-radius: var(--radius-pill);
    background: var(--color-mint);
}

.bass-frequency-control input::-webkit-slider-thumb,
.bass-output-level input::-webkit-slider-thumb,
.rattle-control > input::-webkit-slider-thumb {
    width: 1.15rem;
    height: 1.15rem;
    margin-block-start: -0.43rem;
    appearance: none;
    border: 3px solid var(--color-background);
    border-radius: 50%;
    background: var(--color-mint);
    box-shadow: 0 4px 12px rgb(0 0 0 / 0.36);
}

.bass-frequency-control input::-moz-range-thumb,
.bass-output-level input::-moz-range-thumb,
.rattle-control > input::-moz-range-thumb {
    width: 0.9rem;
    height: 0.9rem;
    border: 3px solid var(--color-background);
    border-radius: 50%;
    background: var(--color-mint);
}

.bass-frequency-control__scale {
    display: flex;
    justify-content: space-between;
    color: var(--color-text-secondary);
    font-size: 0.62rem;
    font-variant-numeric: tabular-nums;
}

.bass-output-level small {
    max-width: none;
    font-size: 0.68rem;
    line-height: 1.35;
}

.bass-play-selected,
.bass-stop,
.bass-sweep-controls button,
.rattle-control__play,
.room-compare > button,
.session-notes__actions button,
.extension-observation__actions button,
.rattle-control__nudges button,
.bass-transport button {
    min-height: 2.9rem;
    padding-inline: var(--space-4);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    border: 1px solid color-mix(in srgb, var(--color-cyan) 42%, var(--color-border));
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--color-cyan) 7%, transparent);
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
}

.bass-play-selected,
.bass-sweep-controls button[data-bass-audio],
.rattle-control__play,
.room-compare > button,
.session-notes__actions button[type="submit"] {
    border-color: transparent;
    background: var(--color-mint);
    color: #06100d;
}

.bass-play-selected svg {
    width: 1.1rem;
    fill: currentColor;
}

.bass-play-selected:hover,
.bass-sweep-controls button:hover,
.rattle-control__play:hover,
.room-compare > button:hover,
.session-notes__actions button:hover,
.extension-observation__actions button:hover,
.rattle-control__nudges button:hover,
.bass-transport button:hover {
    transform: translateY(-1px);
}

button:disabled,
input:disabled,
select:disabled {
    opacity: 0.42;
    cursor: not-allowed;
    transform: none !important;
}

.bass-intro {
    padding-block: clamp(var(--space-8), 5vw, var(--space-16));
    border-block: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-cyan) 2%, var(--color-surface));
}

.bass-intro__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
    align-items: start;
    gap: clamp(var(--space-8), 6vw, var(--space-16));
}

.bass-intro__copy {
    display: grid;
    gap: var(--space-4);
}

.bass-intro__copy p {
    max-width: none;
}

.bass-intro__lead {
    color: var(--color-text);
    font-size: var(--text-lg);
    font-weight: var(--font-weight-medium);
}

.bass-intro__copy p:last-child,
.bass-safety p {
    color: var(--color-text-secondary);
}

.bass-safety {
    padding: var(--space-5, 1.25rem) 0;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-4);
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 38%, var(--color-border));
}

.bass-safety__signal {
    width: var(--space-3);
    height: var(--space-3);
    margin-block-start: 0.4rem;
    border: 2px solid var(--color-warning);
    border-radius: 50%;
    box-shadow: 0 0 0 0.28rem color-mix(in srgb, var(--color-warning) 12%, transparent);
}

.bass-safety h2 {
    font-size: var(--text-lg);
}

.bass-safety p {
    max-width: none;
    margin-block-start: var(--space-2);
    font-size: var(--text-sm);
}

.bass-safety ul {
    margin: var(--space-4) 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2) var(--space-4);
    list-style: none;
}

.bass-safety li {
    position: relative;
    padding-inline-start: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
}

.bass-safety li::before {
    content: "";
    position: absolute;
    inset: 0.6em auto auto 0;
    width: 0.35rem;
    height: 0.35rem;
    border-radius: 50%;
    background: var(--color-warning);
}

.bass-module {
    padding-block: clamp(var(--space-12), 7vw, var(--space-24));
}

.bass-module:nth-child(even) {
    border-block: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-cyan) 2%, var(--color-surface));
}

.bass-module__inner {
    align-items: stretch;
    flex-direction: column;
    gap: var(--space-8);
}

.bass-module__inner--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    align-items: center;
    gap: clamp(var(--space-8), 6vw, var(--space-16));
}

.bass-module__header {
    align-items: start;
    width: 100%;
    max-width: none;
}

.bass-module__header--wide {
    width: 100%;
    max-width: none;
    grid-template-columns: auto minmax(0, 1fr) minmax(16rem, 0.48fr);
}

.bass-module__icon {
    width: 2.8rem;
    height: 2.8rem;
    display: grid;
    place-items: center;
    border: 1px solid color-mix(in srgb, var(--color-cyan) 38%, var(--color-border));
    border-radius: var(--radius-md);
    color: var(--color-cyan);
    background: color-mix(in srgb, var(--color-cyan) 6%, transparent);
}

.bass-module__icon--warning {
    border-color: color-mix(in srgb, var(--color-warning) 45%, var(--color-border));
    color: var(--color-warning);
    background: color-mix(in srgb, var(--color-warning) 5%, transparent);
}

.bass-module__icon svg {
    width: 1.4rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.7;
}

.bass-module__fact {
    padding-block: var(--space-3);
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 34%, var(--color-border));
    color: var(--color-text) !important;
    font-size: var(--text-sm) !important;
}

.extension-workbench {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr);
    border-block: 1px solid var(--color-border);
}

.extension-steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-inline-end: 1px solid var(--color-border);
}

.extension-steps button {
    min-height: 6rem;
    border-block-end: 1px solid var(--color-border);
}

.extension-steps button:nth-child(4n) { border-inline-end: 0; }
.extension-steps button:nth-last-child(-n + 4) { border-block-end: 0; }

.extension-observation {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-5, 1.25rem);
}

.extension-observation__readout small {
    display: block;
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.extension-observation__readout strong {
    display: block;
    font-family: var(--font-measurement);
    font-size: clamp(2.25rem, 4vw, 3.5rem);
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.extension-observation__readout i {
    color: var(--color-cyan);
    font-size: var(--text-lg);
    font-style: normal;
}

.extension-observation__actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
}

.extension-observation__actions button {
    min-height: 3.5rem;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

.extension-observation > p {
    min-height: 3.9rem;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.bass-sweep-panel,
.rattle-control,
.room-compare {
    min-width: 0;
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface-elevated);
}

.bass-sweep-readout {
    justify-content: space-between;
    gap: var(--space-4);
}

.bass-sweep-readout > span {
    display: grid;
    gap: var(--space-1);
}

.bass-sweep-readout > span:last-child {
    text-align: end;
}

.bass-sweep-readout small,
.rattle-control__frequency small {
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bass-sweep-readout strong,
.rattle-control__frequency strong {
    color: var(--color-text);
    font-family: var(--font-measurement);
    font-size: var(--text-2xl);
    font-variant-numeric: tabular-nums;
}

.bass-sweep-track {
    height: 5.4rem;
    margin-block: var(--space-6);
    position: relative;
    border-block-end: 1px solid var(--color-border);
}

.bass-sweep-track::before {
    content: "";
    position: absolute;
    inset: 1rem 0 auto;
    height: 0.35rem;
    border-radius: var(--radius-pill);
    background: var(--color-border);
}

.bass-sweep-track__fill {
    position: absolute;
    z-index: 1;
    inset: 1rem auto auto 0;
    width: 0;
    height: 0.35rem;
    border-radius: var(--radius-pill);
    background: var(--brand-gradient);
}

.bass-sweep-track > i {
    position: absolute;
    z-index: 2;
    inset-block-start: 0.45rem;
    inset-inline-start: 0;
    width: 1.45rem;
    height: 1.45rem;
    border: 4px solid var(--color-surface-elevated);
    border-radius: 50%;
    background: var(--color-mint);
    box-shadow: 0 5px 16px rgb(0 0 0 / 0.38);
    transform: translateX(-50%);
}

.bass-sweep-track > div {
    position: absolute;
    inset: auto 0 var(--space-2);
    display: flex;
    justify-content: space-between;
    color: var(--color-text-secondary);
    font-size: 0.68rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.08em;
}

.bass-sweep-track > div span:nth-child(2) { color: var(--color-cyan); }

.bass-sweep-controls {
    display: grid;
    grid-template-columns: minmax(11rem, 1fr) auto auto;
    gap: var(--space-3);
}

.bass-sweep-controls label {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
}

.bass-sweep-controls select,
.room-compare input,
.room-compare select,
.session-notes input,
.session-notes textarea {
    width: 100%;
    min-height: 2.8rem;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-background);
    color: var(--color-text);
    font: inherit;
}

.bass-test-page select {
    padding-inline-end: 2.75rem;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m4 6 4 4 4-4' fill='none' stroke='%2334d6ff' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.75'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    background-size: 0.9rem 0.9rem;
}

.bass-test-page select::-ms-expand {
    display: none;
}

[dir="rtl"] .bass-test-page select {
    padding-inline: var(--space-3) 2.75rem;
    background-position: left var(--space-3) center;
}

.bass-test-page select option {
    background: var(--color-background);
    color: var(--color-text);
}

.rattle-control {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--space-5, 1.25rem) var(--space-6);
}

.rattle-control__frequency {
    display: grid;
}

.rattle-control > input {
    grid-column: 1 / -1;
}

.rattle-control__nudges {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-2);
}

.rattle-control__nudges button {
    min-height: 2.7rem;
    padding-inline: var(--space-3);
    font-size: var(--text-sm);
}

.rattle-control > p {
    grid-column: 1 / -1;
    padding-block-start: var(--space-4);
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-3);
    border-block-start: 1px solid color-mix(in srgb, var(--color-warning) 30%, var(--color-border));
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.rattle-control > p span {
    width: 1.4rem;
    height: 1.4rem;
    display: grid;
    place-items: center;
    border: 1px solid var(--color-warning);
    border-radius: 50%;
    color: var(--color-warning);
    font-weight: var(--font-weight-bold);
}

.crossover-bench {
    width: 100%;
    display: grid;
    gap: var(--space-6);
}

.crossover-curve {
    width: 100%;
    height: 11rem;
    position: relative;
    overflow: hidden;
    border-block: 1px solid var(--color-border);
}

.crossover-curve::before {
    content: "";
    position: absolute;
    inset: 50% 0 auto;
    height: 1px;
    background: color-mix(in srgb, var(--color-border) 70%, transparent);
}

.crossover-curve::after {
    content: "";
    position: absolute;
    inset: 0 auto 0 50%;
    width: clamp(5rem, 12vw, 8rem);
    background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--color-warning) 7%, transparent), transparent);
    transform: translateX(-50%);
}

.crossover-curve__sub,
.crossover-curve__mains {
    position: absolute;
    z-index: 1;
    inset-block-start: 1.6rem;
    width: 65%;
    height: 5rem;
    border-block-start: 3px solid var(--color-mint);
    border-radius: 50%;
    transform: rotate(8deg);
}

.crossover-curve__sub { inset-inline-start: -4%; }
.crossover-curve__mains {
    inset-inline-end: -4%;
    border-color: var(--color-cyan);
    transform: rotate(-8deg);
}

.crossover-curve > i {
    position: absolute;
    z-index: 2;
    inset: 1.2rem auto auto 50%;
    width: 1px;
    height: 6.8rem;
    background: var(--color-warning);
}

.crossover-curve > div {
    position: absolute;
    z-index: 2;
    inset: auto 0 var(--space-3);
    display: flex;
    justify-content: space-between;
    color: var(--color-text-secondary);
    font-size: 0.64rem;
    letter-spacing: 0.08em;
}

.crossover-curve > div span:nth-child(2) { color: var(--color-warning); }

.crossover-bench__footer {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(30rem, 1.08fr);
    align-items: stretch;
    gap: var(--space-8);
}

.crossover-guidance {
    margin: 0;
    padding-block: var(--space-3);
    align-content: center;
    border-block: 1px solid var(--color-border);
}

.crossover-guidance p {
    margin: 0;
    display: grid;
    grid-template-columns: 6.8rem minmax(0, 1fr);
    gap: var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    line-height: 1.55;
}

.crossover-presets {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-block: 1px solid var(--color-border);
}

.crossover-presets button {
    min-height: 6rem;
}

.room-compare {
    display: grid;
    gap: var(--space-5, 1.25rem);
}

.room-compare__fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
}

.room-compare > button {
    width: fit-content;
}

.room-compare__results {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-block-start: 1px solid var(--color-border);
}

.room-compare__results > div {
    min-height: 5.5rem;
    padding: var(--space-4) var(--space-5, 1.25rem) 0 0;
}

.room-compare__results > div + div {
    padding-inline-start: var(--space-5, 1.25rem);
    border-inline-start: 1px solid var(--color-border);
}

.room-compare__results small {
    color: var(--color-cyan);
    font-size: 0.68rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.1em;
}

.room-compare__results p {
    margin-block-start: var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.session-notes {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--space-6);
}

.session-notes label > span {
    color: var(--color-text);
}

.session-notes__overall,
.session-notes__actions {
    grid-column: 1 / -1;
}

.session-notes textarea {
    min-height: 6.5rem;
    resize: vertical;
}

.session-notes__actions {
    gap: var(--space-3);
}

.session-notes__actions p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.bass-copy-section,
.bass-faq {
    padding-block: var(--section-space);
}

.bass-copy-section--surface,
.bass-faq {
    border-block: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-cyan) 2%, var(--color-surface));
}

.bass-section-header {
    max-width: none;
    margin-block-end: var(--space-10, 2.5rem);
}

.bass-section-header > p:not(.bass-section-kicker),
.bass-editorial-split > div > p,
.bass-crossover-copy > div > p,
.bass-room-layout > div > p {
    margin-block-start: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

.bass-section-kicker {
    margin-block-end: var(--space-3);
}

.bass-how-to-layout,
.bass-troubleshooting-layout {
    display: grid;
    grid-template-columns: minmax(16rem, 0.68fr) minmax(0, 1.32fr);
    align-items: start;
    gap: clamp(var(--space-8), 6vw, var(--space-16));
}

.bass-section-header--sticky {
    margin: 0;
    position: sticky;
    top: calc(var(--space-20) + var(--space-6));
}

.bass-steps {
    margin: 0;
    padding: 0;
    list-style: none;
    border-block-start: 1px solid var(--color-border);
}

.bass-steps li {
    padding-block: var(--space-5, 1.25rem);
    display: grid;
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: var(--space-4);
    border-block-end: 1px solid var(--color-border);
}

.bass-steps li > span,
.bass-device-rows > div > span,
.resonance-checklist li > span {
    color: var(--color-cyan);
    font-family: var(--font-measurement);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
    font-variant-numeric: tabular-nums;
}

.bass-steps h3 {
    font-size: var(--text-lg);
}

.bass-steps p {
    margin-block-start: var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.bass-range-map {
    height: 4.5rem;
    display: grid;
    grid-template-columns: 20fr 20fr 40fr 60fr 90fr;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.bass-range-map__band {
    min-width: 0;
    padding: var(--space-2);
    display: flex;
    align-items: flex-end;
    border-inline-end: 1px solid var(--color-background);
    color: #04100c;
    font-size: clamp(0.6rem, 0.9vw, 0.75rem);
    white-space: nowrap;
}

.bass-range-map__band--1 { background: color-mix(in srgb, var(--color-mint) 88%, black); }
.bass-range-map__band--2 { background: color-mix(in srgb, var(--color-mint) 70%, var(--color-cyan)); }
.bass-range-map__band--3 { background: var(--color-cyan); }
.bass-range-map__band--4 { background: color-mix(in srgb, var(--color-cyan) 74%, white); }
.bass-range-map__band--5 { background: color-mix(in srgb, var(--color-cyan) 48%, var(--color-surface-elevated)); color: var(--color-text); }

.bass-range-rows {
    margin-block-start: var(--space-8);
    border-block-start: 1px solid var(--color-border);
}

.bass-range-rows article {
    padding-block: var(--space-5, 1.25rem);
    display: grid;
    grid-template-columns: minmax(7rem, 0.4fr) minmax(15rem, 0.85fr) minmax(20rem, 1.25fr);
    gap: var(--space-6);
    border-block-end: 1px solid var(--color-border);
}

.bass-range-rows h3 {
    color: var(--color-cyan);
    font-family: var(--font-measurement);
    font-size: var(--text-lg);
    font-variant-numeric: tabular-nums;
}

.bass-range-rows p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.bass-editorial-split,
.bass-room-layout,
.bass-crossover-copy {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
    gap: clamp(var(--space-10, 2.5rem), 7vw, var(--space-20));
}

.bass-editorial-split--reverse > div:first-child { order: 2; }
.bass-editorial-split--reverse > div:last-child { order: 1; }

.bass-rolloff-diagram {
    padding-block: var(--space-6);
    border-block: 1px solid var(--color-border);
}

.bass-rolloff-diagram__label,
.bass-rolloff-diagram__axis {
    display: flex;
    justify-content: space-between;
    color: var(--color-text-secondary);
    font-size: 0.68rem;
}

.bass-rolloff-diagram svg {
    width: 100%;
    height: auto;
    margin-block: var(--space-3);
}

.bass-rolloff-diagram__grid {
    fill: none;
    stroke: var(--color-border);
    stroke-width: 1;
}

.bass-rolloff-diagram__curve {
    fill: none;
    stroke: var(--color-mint);
    stroke-linecap: round;
    stroke-width: 4;
}

.bass-rolloff-diagram > p {
    margin-block-start: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
}

.resonance-checklist {
    padding-block: var(--space-6);
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 34%, var(--color-border));
}

.resonance-checklist__lead {
    color: var(--color-warning);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-bold);
}

.resonance-checklist ul {
    margin: var(--space-5, 1.25rem) 0 0;
    padding: 0;
    list-style: none;
}

.resonance-checklist li {
    padding-block: var(--space-3);
    display: grid;
    grid-template-columns: 2.5rem minmax(0, 1fr);
    border-block-start: 1px solid var(--color-border);
}

.resonance-checklist li > span { color: var(--color-warning); }

.bass-crossover-copy {
    align-items: start;
}

.bass-crossover-copy aside {
    margin-block-start: var(--space-6);
    padding-block: var(--space-4);
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 35%, var(--color-border));
    color: var(--color-text-secondary);
}

.bass-crossover-copy aside strong { color: var(--color-warning); }

.room-mode-diagram {
    padding-block: var(--space-5, 1.25rem);
    border-block: 1px solid var(--color-border);
}

.room-mode-diagram__room {
    min-height: 18rem;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--color-border);
    background-color: var(--color-background);
}

.room-mode-diagram__boundary,
.room-mode-diagram__source {
    position: absolute;
    z-index: 3;
    color: var(--color-text-secondary);
    font-size: 0.62rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.1em;
}

.room-mode-diagram__boundary { inset: var(--space-3) auto auto var(--space-4); }
.room-mode-diagram__source { inset: 67% auto auto var(--space-3); color: var(--color-mint); }

.room-mode-diagram__room svg {
    position: absolute;
    z-index: 1;
    inset: 0;
    width: 100%;
    height: 100%;
}

.room-mode-diagram__axis {
    fill: none;
    stroke: color-mix(in srgb, var(--color-text-secondary) 28%, transparent);
    stroke-dasharray: 4 7;
    stroke-width: 1;
}

.room-mode-diagram__wave {
    fill: none;
    stroke: var(--color-cyan);
    stroke-linecap: round;
    stroke-width: 2;
    opacity: 0.72;
}

.room-mode-diagram__speaker {
    position: absolute;
    z-index: 4;
    inset: 50% auto auto var(--space-4);
    width: 2.35rem;
    height: 5rem;
    border: 1px solid var(--color-mint);
    background-color: color-mix(in srgb, var(--color-mint) 9%, var(--color-surface));
    transform: translateY(-50%);
}

.room-mode-diagram__speaker i {
    position: absolute;
    inset-inline-start: 50%;
    width: 1.05rem;
    height: 1.05rem;
    border: 1px solid color-mix(in srgb, var(--color-mint) 70%, white);
    border-radius: 50%;
    transform: translateX(-50%);
}

.room-mode-diagram__speaker i:first-child { inset-block-start: 0.65rem; }
.room-mode-diagram__speaker i:last-child { inset-block-end: 0.65rem; }

.room-mode-diagram__zone {
    position: absolute;
    z-index: 2;
    padding: 0.35rem 0.55rem;
    border: 1px dashed;
    border-radius: var(--radius-xs);
    font-size: 0.62rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.25;
}

.room-mode-diagram__zone--high {
    inset: 17% 20% auto auto;
    border-color: color-mix(in srgb, var(--color-cyan) 54%, transparent);
    background-color: color-mix(in srgb, var(--color-cyan) 8%, var(--color-background));
    color: var(--color-cyan);
}

.room-mode-diagram__zone--low {
    inset: auto 40% 13% auto;
    border-color: color-mix(in srgb, var(--color-mint) 50%, transparent);
    background-color: color-mix(in srgb, var(--color-mint) 7%, var(--color-background));
    color: var(--color-mint);
}

.room-mode-diagram__seat {
    position: absolute;
    z-index: 4;
    min-width: 4.5rem;
    min-height: 3.5rem;
    padding: var(--space-2);
    display: grid;
    place-items: center;
    border: 1px solid var(--color-cyan);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface-elevated);
    color: var(--color-cyan);
    font-weight: var(--font-weight-bold);
}

.room-mode-diagram__seat b { font-family: var(--font-measurement); font-size: var(--text-base); line-height: 1; }
.room-mode-diagram__seat small { color: var(--color-text-secondary); font-size: 0.62rem; font-weight: var(--font-weight-medium); }
.room-mode-diagram__seat--a { inset: 32% 25% auto auto; }
.room-mode-diagram__seat--b { inset: auto 44% 25% auto; border-color: var(--color-mint); color: var(--color-mint); }

.room-mode-diagram__legend {
    margin-block-start: var(--space-4);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-3) var(--space-6);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
}

.room-mode-diagram__legend span { display: inline-flex; align-items: center; gap: var(--space-2); }
.room-mode-diagram__legend i { width: 1.5rem; height: 2px; background: var(--color-cyan); }

.room-mode-diagram__note {
    max-width: none;
    margin-block-start: var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    line-height: 1.55;
}

.bass-device-rows {
    border-block-start: 1px solid var(--color-border);
}

.bass-device-rows > div {
    padding-block: var(--space-5, 1.25rem);
    display: grid;
    grid-template-columns: 2.5rem minmax(13rem, 0.7fr) minmax(0, 1.3fr);
    gap: var(--space-5, 1.25rem);
    border-block-end: 1px solid var(--color-border);
}

.bass-device-rows h3 { font-size: var(--text-lg); }
.bass-device-rows p { color: var(--color-text-secondary); }
.bass-device-rows a { color: var(--color-cyan); }

.bass-result-table {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    border-block-start: 1px solid var(--color-border);
}

.bass-result-table th,
.bass-result-table td {
    padding: var(--space-4) var(--space-5, 1.25rem);
    border-block-end: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    text-align: start;
    vertical-align: top;
}

.bass-result-table thead th {
    color: var(--color-cyan);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bass-result-table tbody th {
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.bass-limits {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-12);
}

.bass-limits > div {
    padding-block: var(--space-6);
    border-block: 1px solid var(--color-border);
}

.bass-limits h3 { font-size: var(--text-2xl); }
.bass-limits ul { margin: var(--space-5, 1.25rem) 0 0; padding-inline-start: 1.1rem; }
.bass-limits li { color: var(--color-text-secondary); }
.bass-limits li + li { margin-block-start: var(--space-3); }

.bass-limit-warning {
    width: 100%;
    max-width: none;
    box-sizing: border-box;
    margin-block-start: var(--space-8);
    padding: var(--space-5, 1.25rem) var(--space-6);
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 38%, var(--color-border));
    background-color: color-mix(in srgb, var(--color-warning) 4%, transparent);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.bass-limit-warning strong { color: var(--color-warning); }
.bass-measurement-link { width: 100%; max-width: none; margin-block-start: var(--space-6); color: var(--color-text-secondary); line-height: 1.7; }
.bass-measurement-link a { color: var(--color-cyan); }

.bass-accordion,
.bass-faq__list {
    border-block-start: 1px solid var(--color-border);
}

.bass-accordion details,
.bass-faq__list details {
    border-block-end: 1px solid var(--color-border);
}

.bass-accordion summary,
.bass-faq__list summary {
    min-height: 4.5rem;
    padding-block: var(--space-4);
    display: grid;
    grid-template-columns: minmax(0, 1fr) 2.5rem;
    align-items: center;
    gap: var(--space-4);
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
    list-style: none;
    cursor: pointer;
}

.bass-accordion summary::marker,
.bass-accordion summary::-webkit-details-marker,
.bass-faq__list summary::marker,
.bass-faq__list summary::-webkit-details-marker {
    content: "";
    display: none;
}

.bass-accordion summary > span:last-child,
.bass-faq__list summary > span:last-child {
    width: 2.25rem;
    height: 2.25rem;
    display: grid;
    place-items: center;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-cyan);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-regular);
}

.bass-accordion details[open] summary > span:last-child,
.bass-faq__list details[open] summary > span:last-child {
    transform: rotate(45deg);
}

.bass-accordion details p,
.bass-faq__list details p {
    max-width: none;
    padding: var(--space-1) 4.25rem var(--space-6) 0;
    color: var(--color-text-secondary);
}

.bass-related-tools {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-block-start: 1px solid var(--color-border);
}

.bass-related-tools a {
    min-height: 10rem;
    padding: var(--space-6);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-content: start;
    gap: var(--space-3) var(--space-4);
    border-block-end: 1px solid var(--color-border);
    color: var(--color-text);
    text-decoration: none;
}

.bass-related-tools a:not(:nth-child(3n)) { border-inline-end: 1px solid var(--color-border); }
.bass-related-tools strong { font-family: var(--font-display); font-size: var(--text-lg); }
.bass-related-tools span { grid-column: 1 / -1; color: var(--color-text-secondary); font-size: var(--text-sm); }
.bass-related-tools svg { width: 1.2rem; fill: none; stroke: var(--color-cyan); stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
.bass-related-tools a:hover { background: color-mix(in srgb, var(--color-cyan) 4%, transparent); }
.bass-related-tools a:hover svg { transform: translateX(var(--space-1)); }

.bass-faq__list {
    columns: 2;
    column-gap: var(--space-12);
}

.bass-faq__list details { break-inside: avoid; }

.bass-transport {
    position: fixed;
    z-index: 90;
    inset: auto 0 0;
    border-block-start: 1px solid color-mix(in srgb, var(--color-mint) 22%, var(--color-border));
    background: color-mix(in srgb, var(--color-surface-elevated) 96%, var(--color-background));
    box-shadow: 0 -6px 18px rgb(0 0 0 / 0.18);
    transform: translateY(0);
}

.bass-test-page[data-playing="true"] {
    padding-block-end: 3.25rem;
}

.bass-transport[aria-hidden="true"] {
    pointer-events: none;
    transform: translateY(110%);
}

.bass-transport__inner {
    min-height: 3.25rem;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--space-3);
}

.bass-transport__inner > div {
    min-width: 0;
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    overflow: hidden;
}

.bass-transport small { color: var(--color-text-secondary); font-size: 0.65rem; letter-spacing: 0.08em; text-transform: uppercase; }
.bass-transport strong { overflow: hidden; font-size: var(--text-sm); text-overflow: ellipsis; white-space: nowrap; }

.bass-transport button {
    min-height: 2.25rem;
    padding-inline: var(--space-4);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
}

@keyframes bass-pulse {
    from { opacity: 0.38; transform: scale(0.82); }
    to { opacity: 0; transform: scale(1.18); }
}

@media (max-width: 70rem) {
    .bass-preset-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .bass-preset-grid button:nth-child(6n) { border-inline-end: 0; }
    .bass-preset-grid button:nth-child(-n + 6) { border-block-end: 1px solid var(--color-border); }
    .bass-console__footer { grid-template-columns: minmax(16rem, 1fr) auto minmax(12rem, 0.8fr); }
    .bass-stop { grid-column: 1 / -1; }
}

@media (max-width: 60rem) {
    .bass-module__inner--split,
    .bass-how-to-layout,
    .bass-troubleshooting-layout,
    .bass-intro__inner,
    .bass-editorial-split,
    .bass-room-layout,
    .bass-crossover-copy {
        grid-template-columns: 1fr;
    }

    .bass-section-header--sticky { position: static; }
    .bass-module__header--wide { grid-template-columns: auto minmax(0, 1fr); }
    .bass-module__fact { grid-column: 2; }
    .crossover-bench__footer { grid-template-columns: 1fr; gap: var(--space-5, 1.25rem); }
    .bass-editorial-split--reverse > div:first-child,
    .bass-editorial-split--reverse > div:last-child { order: initial; }
    .bass-range-rows article { grid-template-columns: minmax(7rem, 0.42fr) minmax(0, 1.58fr); }
    .bass-range-rows article p:last-child { grid-column: 2; }
}

@media (max-width: 50rem) {
    .bass-console__header { align-items: flex-start; flex-direction: column; }
    .bass-console__state { white-space: normal; }
    .bass-console__footer { grid-template-columns: 1fr; }
    .bass-stop { grid-column: auto; width: 100%; }
    .extension-workbench { grid-template-columns: 1fr; }
    .extension-steps { border-inline-end: 0; border-block-end: 1px solid var(--color-border); }
    .bass-module__header--wide { grid-template-columns: auto minmax(0, 1fr); }
    .crossover-presets { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .session-notes,
    .bass-limits,
    .bass-related-tools { grid-template-columns: 1fr; }
    .bass-related-tools a:not(:nth-child(3n)) { border-inline-end: 0; }
    .bass-faq__list { columns: 1; }
    .bass-device-rows > div { grid-template-columns: 2.5rem minmax(0, 1fr); }
    .bass-device-rows p { grid-column: 2; }
    .bass-result-table thead { display: none; }
    .bass-result-table,
    .bass-result-table tbody,
    .bass-result-table tr,
    .bass-result-table th,
    .bass-result-table td { width: 100%; display: block; }
    .bass-result-table tr { padding-block: var(--space-5, 1.25rem); border-block-end: 1px solid var(--color-border); }
    .bass-result-table th,
    .bass-result-table td { padding: var(--space-2) 0; border: 0; }
    .bass-result-table th::before,
    .bass-result-table td::before { content: attr(data-label); margin-block-end: var(--space-1); display: block; color: var(--color-cyan); font-size: 0.68rem; font-weight: var(--font-weight-bold); letter-spacing: 0.07em; text-transform: uppercase; }
}

@media (max-width: 40rem) {
    .bass-hero { padding-block: var(--space-8) var(--space-5, 1.25rem); }
    .bass-hero h1 { max-width: 22ch; font-size: clamp(1.85rem, 8.5vw, 2.35rem); }
    .bass-console { border-radius: var(--radius-lg); }
    .bass-console__header,
    .bass-console__footer,
    .bass-sweep-panel,
    .rattle-control,
    .room-compare { padding: var(--space-4); }
    .bass-console__title { align-items: start; }
    .bass-frequency-display { min-height: 8rem; }
    .bass-frequency-display > small { inset-block-end: var(--space-3); }
    .bass-preset-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .bass-preset-grid button { min-height: 4rem; }
    .bass-preset-grid button:nth-child(6n) { border-inline-end: 1px solid var(--color-border); }
    .bass-preset-grid button:nth-child(4n) { border-inline-end: 0; }
    .bass-preset-grid button:nth-child(-n + 8) { border-block-end: 1px solid var(--color-border); }
    .bass-intro__lead,
    .bass-section-header > p:not(.bass-section-kicker),
    .bass-editorial-split > div > p,
    .bass-crossover-copy > div > p,
    .bass-room-layout > div > p { font-size: var(--text-base); }
    .bass-safety ul { grid-template-columns: 1fr; }
    .bass-module { padding-block: var(--space-16); }
    .bass-module__inner { padding-inline: var(--space-4); }
    .bass-module:nth-child(even) {
        width: min(100% - (var(--page-gutter) * 2), var(--container-max));
        margin-inline: auto;
    }
    .bass-module:nth-child(even) .bass-module__inner { padding-inline: 0; }
    .bass-module__header { grid-template-columns: 1fr; }
    .bass-module__header--wide { grid-template-columns: 1fr; }
    .bass-module__fact { grid-column: auto; }
    .bass-module__header .bass-module__guidance p { grid-template-columns: 1fr; gap: var(--space-1); }
    .crossover-guidance p { grid-template-columns: 1fr; gap: var(--space-1); }
    .crossover-curve { height: 9.5rem; }
    .crossover-curve > div {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--space-1);
        font-size: 0.64rem;
        letter-spacing: 0;
        text-align: center;
    }
    .crossover-curve > div span { min-width: 0; }
    .crossover-curve > div span:first-child { text-align: start; }
    .crossover-curve > div span:nth-child(2) { grid-column: 1 / -1; grid-row: 2; }
    .crossover-curve > div span:last-child { grid-column: 2; grid-row: 1; text-align: end; }
    .crossover-curve > i { height: 5.5rem; }
    .crossover-presets button { min-height: 5.25rem; padding-inline: var(--space-1); }
    .extension-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .extension-steps button:nth-child(4n) { border-inline-end: 1px solid var(--color-border); }
    .extension-steps button:nth-child(2n) { border-inline-end: 0; }
    .extension-steps button:nth-last-child(-n + 4) { border-block-end: 1px solid var(--color-border); }
    .extension-steps button:nth-last-child(-n + 2) { border-block-end: 0; }
    .bass-sweep-controls { grid-template-columns: 1fr; }
    .bass-sweep-controls label { grid-template-columns: 1fr; }
    .rattle-control { grid-template-columns: 1fr; }
    .rattle-control__play { width: 100%; }
    .rattle-control__nudges { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .room-compare__fields,
    .room-compare__results { grid-template-columns: 1fr; }
    .room-compare__results > div + div { padding-inline-start: 0; border-inline-start: 0; border-block-start: 1px solid var(--color-border); }
    .bass-range-map { height: auto; grid-template-columns: 1fr; }
    .bass-range-map__band { min-height: 2.4rem; border-inline-end: 0; border-block-end: 1px solid var(--color-background); }
    .bass-range-rows article { grid-template-columns: 1fr; gap: var(--space-2); }
    .bass-range-rows article p:last-child { grid-column: auto; }
    .bass-rolloff-diagram__label span:nth-child(2) { display: none; }
    .room-mode-diagram__room { min-height: 21rem; }
    .room-mode-diagram__zone--high { inset: 12% var(--space-3) auto auto; }
    .room-mode-diagram__zone--low { inset: auto auto 12% 35%; }
    .room-mode-diagram__seat--a { inset: 34% var(--space-4) auto auto; }
    .room-mode-diagram__seat--b { inset: auto auto 28% 42%; }
    .room-mode-diagram__legend { justify-content: flex-start; }
    .bass-accordion details p,
    .bass-faq__list details p { padding-inline-end: 0; }
    .session-notes__actions { align-items: stretch; flex-direction: column; }
    .session-notes__actions button { width: 100%; }
    .bass-test-page[data-playing="true"] { padding-block-end: 3rem; }
    .bass-transport__inner { min-height: 3rem; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--space-2); }
    .bass-transport small { display: none; }
    .bass-transport strong { font-size: var(--text-xs); }
    .bass-transport button { min-width: 0; min-height: 2.15rem; padding-inline: var(--space-3); font-size: var(--text-xs); }
}

@media (max-width: 24rem) {
    .bass-preset-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .bass-preset-grid button:nth-child(4n) { border-inline-end: 1px solid var(--color-border); }
    .bass-preset-grid button:nth-child(3n) { border-inline-end: 0; }
    .bass-preset-grid button:nth-child(-n + 9) { border-block-end: 1px solid var(--color-border); }
}

@media (hover: none) {
    .bass-play-selected:hover,
    .bass-sweep-controls button:hover,
    .rattle-control__play:hover,
    .room-compare > button:hover,
    .session-notes__actions button:hover,
    .extension-observation__actions button:hover,
    .rattle-control__nudges button:hover,
    .bass-transport button:hover { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
    .bass-test-page[data-playing="true"] .bass-frequency-display__rings i { animation: none; }
    .bass-transport,
    .bass-related-tools svg { transition-duration: 0.01ms; }
}