/* Headphone Test */

.headphone-page {
    overflow-x: clip;
}

.headphone-test-page {
    background: var(--color-background);
}

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

.headphone-hero__inner {
    display: grid;
    justify-items: center;
    gap: var(--space-3);
    text-align: center;
}

.headphone-hero__eyebrow,
.headphone-section-label {
    color: var(--color-mint);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.headphone-hero h1 {
    max-width: 27ch;
    font-size: clamp(2.15rem, 4vw, 3.9rem);
}

.headphone-hero__support {
    max-width: 68ch;
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

.headphone-hero__safety {
    max-width: 72ch;
    color: color-mix(in srgb, var(--color-warning) 64%, var(--color-text));
    font-size: var(--text-sm);
}

.headphone-hero__nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: var(--space-2) var(--space-5, 1.25rem);
    font-size: var(--text-sm);
}

.headphone-hero__nav a {
    color: var(--color-cyan);
    text-underline-offset: 0.18em;
}

.headphone-tools {
    padding-block-end: var(--space-8);
}

.headphone-tools__layout {
    display: grid;
    gap: var(--space-4);
}

.headphone-tools__pair {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: var(--space-4);
}

.headphone-tool {
    --panel-accent: var(--color-cyan);
    position: relative;
    min-width: 0;
    padding: clamp(1.25rem, 2.4vw, var(--space-8));
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--panel-accent) 24%, var(--color-border));
    border-radius: var(--radius-xl);
    background: color-mix(in srgb, var(--panel-accent) 2.8%, var(--color-surface));
    box-shadow: 0 16px 42px rgb(0 0 0 / 0.18);
}

.headphone-tool::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--panel-accent), transparent 72%);
    opacity: 0.72;
}

.headphone-tool--channels {
    --panel-accent: var(--color-mint);
    padding: 0;
    border-color: color-mix(in srgb, var(--color-mint) 32%, var(--color-border));
    background: color-mix(in srgb, var(--color-mint) 3%, var(--color-surface));
}

.headphone-tool--movement {
    --panel-accent: var(--color-cyan);
}

.headphone-tool--matching {
    --panel-accent: #9f8cff;
}

.headphone-tool--phase {
    --panel-accent: var(--color-warning);
}

.headphone-tool--seal {
    --panel-accent: var(--color-mint);
}

.headphone-tool--clarity {
    --panel-accent: #ff7fb7;
}

.headphone-tool__header {
    margin-block-end: var(--space-6);
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.headphone-tool__header--primary {
    margin: 0;
    padding: 1.25rem clamp(1.25rem, 2.5vw, var(--space-8));
    align-items: center;
    justify-content: space-between;
    border-block-end: 1px solid var(--color-border);
}

.headphone-tool__title {
    min-width: 0;
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.headphone-tool__header h2 {
    font-size: clamp(1.2rem, 2vw, 1.65rem);
}

.headphone-tool__header > div,
.ear-swap-method > div {
    min-width: 0;
}

.headphone-tool__header p {
    max-width: 62ch;
    margin-block-start: var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.headphone-tool__asset,
.headphone-tool__icon {
    width: 2.75rem;
    height: 2.75rem;
    display: grid;
    flex: 0 0 auto;
    place-items: center;
    border: 1px solid color-mix(in srgb, var(--panel-accent) 34%, var(--color-border));
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--panel-accent) 9%, var(--color-surface-elevated));
    color: var(--panel-accent);
}

.headphone-tool__asset img,
.headphone-tool__icon img {
    width: 1.75rem;
    height: 1.75rem;
    object-fit: contain;
}

.headphone-tool--movement .headphone-tool__icon img,
.headphone-tool--matching .headphone-tool__icon img {
    width: 1.65rem;
    height: 1.65rem;
}

.headphone-tool--phase .headphone-tool__icon img,
.headphone-tool--seal .headphone-tool__icon img {
    width: 1.55rem;
    height: 1.55rem;
}

.headphone-tool__icon svg {
    width: 1.4rem;
    height: 1.4rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.7;
}

.headphone-console__state {
    min-height: 2.5rem;
    padding-inline: var(--space-4);
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    flex: 0 0 auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
}

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

.headphone-tools[data-playing="true"] .headphone-console__state {
    border-color: color-mix(in srgb, var(--color-mint) 48%, var(--color-border));
    color: var(--color-text);
}

.headphone-tools[data-playing="true"] .headphone-console__state-dot {
    background: var(--color-mint);
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-mint) 12%, transparent);
}

.headphone-channel-stage {
    position: relative;
    min-height: 12.5rem;
    padding: clamp(1.15rem, 2.3vw, var(--space-6));
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
    background: radial-gradient(circle at center, color-mix(in srgb, var(--color-cyan) 6%, transparent), transparent 46%);
}

.headphone-channel-stage__rail {
    position: absolute;
    inset: 50% 9% auto;
    height: 1px;
    background: linear-gradient(90deg, var(--color-border), var(--color-cyan), var(--color-border));
    opacity: 0.52;
}

.headphone-channel,
.headphone-sequence,
.headphone-stop,
.headphone-action,
.matching-frequencies button,
.phase-reference button,
.seal-controls button,
.clarity-tones button,
.headphone-transport button {
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font: inherit;
    cursor: pointer;
}

.headphone-channel {
    position: relative;
    min-height: 9.75rem;
    padding: var(--space-4);
    display: grid;
    place-items: center;
    align-content: center;
    gap: var(--space-2);
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--color-surface-elevated) 84%, var(--color-surface));
}

.headphone-channel:hover,
.matching-frequencies button:hover,
.phase-reference button:hover,
.seal-controls button:hover,
.clarity-tones button:hover {
    border-color: color-mix(in srgb, var(--panel-accent) 52%, var(--color-border));
    transform: translateY(-2px);
}

.headphone-channel:active,
.matching-frequencies button:active,
.phase-reference button:active,
.seal-controls button:active,
.clarity-tones button:active,
.headphone-action:active,
.headphone-sequence:active {
    transform: translateY(0);
}

.headphone-channel[aria-pressed="true"],
.matching-frequencies button[aria-pressed="true"],
.phase-reference button[aria-pressed="true"],
.seal-controls button[aria-pressed="true"],
.clarity-tones button[aria-pressed="true"] {
    border-color: var(--panel-accent);
    background: color-mix(in srgb, var(--panel-accent) 10%, var(--color-surface-elevated));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--panel-accent) 20%, transparent);
}

.headphone-channel strong {
    font-family: var(--font-display);
    font-size: 1.05rem;
    letter-spacing: 0.08em;
}

.headphone-channel small,
.matching-frequencies small,
.phase-reference small,
.seal-controls small,
.clarity-tones small {
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
}

.headphone-channel__position {
    width: 3.2rem;
    height: 3.2rem;
    display: grid;
    place-items: center;
}

.headphone-channel__position img {
    width: 2.6rem;
    height: 2.6rem;
    object-fit: contain;
    opacity: 0.92;
    filter: brightness(0) invert(1);
}

.headphone-channel__center {
    width: 1.05rem;
    height: 1.05rem;
    border: 3px solid var(--color-cyan);
    border-radius: 50%;
    box-shadow: 0 0 0 0.6rem color-mix(in srgb, var(--color-cyan) 10%, transparent);
}

.headphone-channel__signal {
    position: absolute;
    inset: auto var(--space-3) var(--space-3) auto;
    height: 1.4rem;
    display: flex;
    align-items: end;
    gap: 3px;
    opacity: 0.35;
}

.headphone-channel__signal i {
    width: 2px;
    height: 38%;
    border-radius: var(--radius-pill);
    background: var(--color-mint);
}

.headphone-channel__signal i:nth-child(2) { height: 76%; }
.headphone-channel__signal i:nth-child(3) { height: 52%; }

.headphone-channel[aria-pressed="true"] .headphone-channel__signal {
    opacity: 1;
}

.headphone-channel[aria-pressed="true"] .headphone-channel__signal i {
    animation: headphone-level 720ms ease-in-out infinite alternate;
}

.headphone-channel[aria-pressed="true"] .headphone-channel__signal i:nth-child(2) { animation-delay: -240ms; }
.headphone-channel[aria-pressed="true"] .headphone-channel__signal i:nth-child(3) { animation-delay: -480ms; }

.headphone-primary-footer {
    padding: var(--space-4) clamp(1.25rem, 2.5vw, var(--space-8));
    display: grid;
    grid-template-columns: minmax(12rem, 0.8fr) minmax(14rem, 1fr) auto;
    align-items: center;
    gap: var(--space-6);
    border-block-start: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-surface-elevated) 56%, var(--color-surface));
}

.headphone-sequence {
    min-height: 3.25rem;
    padding: 0.65rem var(--space-4);
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: var(--space-3);
    border-radius: var(--radius-md);
    background: var(--color-surface-elevated);
    text-align: start;
}

.headphone-sequence > span {
    color: var(--color-cyan);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.headphone-sequence i {
    width: 0.7rem;
    height: 1px;
    display: inline-block;
    margin-inline: 0.15rem;
    background: var(--color-border);
    vertical-align: middle;
}

.headphone-sequence:hover,
.headphone-sequence[aria-pressed="true"] {
    border-color: var(--color-cyan);
    background: color-mix(in srgb, var(--color-cyan) 8%, var(--color-surface-elevated));
}

.headphone-level {
    display: grid;
    gap: var(--space-2);
}

.headphone-level > span {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    font-size: var(--text-sm);
}

.headphone-level output {
    color: var(--color-mint);
    font-family: var(--font-measurement);
    font-weight: var(--font-weight-bold);
}

.headphone-level small {
    color: var(--color-text-secondary);
    font-size: 0.68rem;
}

.headphone-level input {
    --level-percent: 50%;
    width: 100%;
    min-height: 1.25rem;
    margin: 0;
    appearance: none;
    background: transparent;
    cursor: pointer;
}

.headphone-level input::-webkit-slider-runnable-track {
    height: 0.3rem;
    border-radius: var(--radius-pill);
    background: linear-gradient(90deg, var(--color-mint) var(--level-percent), var(--color-border) var(--level-percent));
}

.headphone-level input::-moz-range-track {
    height: 0.3rem;
    border-radius: var(--radius-pill);
    background: linear-gradient(90deg, var(--color-mint) var(--level-percent), var(--color-border) var(--level-percent));
}

.headphone-level input::-webkit-slider-thumb {
    width: 1rem;
    height: 1rem;
    margin-block-start: -0.35rem;
    appearance: none;
    border: 3px solid var(--color-background);
    border-radius: 50%;
    background: var(--color-mint);
    box-shadow: 0 0 0 1px var(--color-mint);
}

.headphone-level input::-moz-range-thumb {
    width: 0.75rem;
    height: 0.75rem;
    border: 3px solid var(--color-background);
    border-radius: 50%;
    background: var(--color-mint);
    box-shadow: 0 0 0 1px var(--color-mint);
}

.headphone-stop,
.headphone-transport button {
    min-height: 3rem;
    padding-inline: var(--space-5, 1.25rem);
    border-radius: var(--radius-md);
    background: transparent;
    font-weight: var(--font-weight-semibold);
}

.headphone-stop:hover:not(:disabled),
.headphone-transport button:hover:not(:disabled) {
    border-color: var(--color-danger);
    color: #ff8aa3;
}

button:disabled,
input:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.headphone-tool__split {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(20rem, 1.2fr);
    align-items: center;
    gap: var(--space-12);
}

.headphone-tool__split .headphone-tool__header {
    margin: 0;
}

.movement-instrument {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--space-4);
}

.movement-instrument__label {
    color: var(--color-text-secondary);
    font-family: var(--font-measurement);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
}

.movement-instrument__track {
    --movement-position: 50%;
    position: relative;
    height: 4.5rem;
    overflow: hidden;
    isolation: isolate;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    background:
        linear-gradient(90deg, transparent, color-mix(in srgb, var(--color-cyan) 4%, transparent) 50%, transparent),
        color-mix(in srgb, var(--color-cyan) 3%, var(--color-surface-elevated));
}

.movement-instrument__track::before,
.movement-instrument__track::after {
    content: "";
    position: absolute;
    top: 50%;
    width: 0.55rem;
    height: 0.55rem;
    z-index: 2;
    border-radius: 50%;
    background: var(--color-border);
    transform: translateY(-50%);
}

.movement-instrument__track::before { left: 1rem; }
.movement-instrument__track::after { right: 1rem; }

.movement-instrument__path {
    position: absolute;
    z-index: 1;
    inset: 50% 1rem auto;
    height: 1px;
    background: linear-gradient(90deg, var(--color-border), color-mix(in srgb, var(--color-cyan) 44%, var(--color-border)) 50%, var(--color-border));
    transform: translateY(-50%);
}

.movement-instrument__center {
    position: absolute;
    z-index: 2;
    inset: 0 auto 0 50%;
    width: 1px;
    background: color-mix(in srgb, var(--color-cyan) 62%, transparent);
    transform: translateX(-50%);
}

.movement-instrument__center::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.55rem;
    height: 0.55rem;
    border: 1px solid var(--color-cyan);
    border-radius: 50%;
    background: var(--color-surface-elevated);
    transform: translate(-50%, -50%);
}

.movement-instrument__trail {
    position: absolute;
    z-index: 3;
    top: 50%;
    left: var(--movement-position);
    width: clamp(3rem, 15%, 5.5rem);
    height: 0.65rem;
    border-radius: var(--radius-pill);
    background: radial-gradient(ellipse at center, color-mix(in srgb, var(--color-cyan) 42%, transparent), transparent 72%);
    filter: blur(4px);
    opacity: 0.42;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.movement-instrument__track i {
    position: absolute;
    z-index: 4;
    top: 50%;
    left: var(--movement-position);
    width: 1.2rem;
    height: 1.2rem;
    border: 3px solid var(--color-background);
    border-radius: 50%;
    background: var(--color-cyan);
    box-shadow: 0 0 0 1px var(--color-cyan), 0 0 1.25rem color-mix(in srgb, var(--color-cyan) 42%, transparent), 0 4px 14px rgb(0 0 0 / 0.38);
    transform: translate(-50%, -50%);
}

.headphone-tools[data-active-test="stereo-movement"] .movement-instrument__track {
    border-color: color-mix(in srgb, var(--color-cyan) 44%, var(--color-border));
    box-shadow: inset 0 0 1.8rem color-mix(in srgb, var(--color-cyan) 4%, transparent);
}

.headphone-tools[data-active-test="stereo-movement"] .movement-instrument__track i,
.headphone-tools[data-active-test="stereo-movement"] .movement-instrument__trail {
    animation: headphone-pan 9.0909s infinite;
    animation-delay: -2.2727s;
}

.headphone-tool__footer-row {
    margin-block-start: var(--space-6);
    padding-block-start: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    border-block-start: 1px solid var(--color-border);
}

.headphone-tool__footer-row p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.headphone-action {
    min-height: 3.1rem;
    padding-inline: var(--space-5, 1.25rem);
    flex: 0 0 auto;
    border-color: color-mix(in srgb, var(--color-cyan) 48%, var(--color-border));
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--color-cyan) 10%, var(--color-surface-elevated));
    font-weight: var(--font-weight-semibold);
}

.headphone-action:hover,
.headphone-action[aria-pressed="true"] {
    border-color: var(--color-cyan);
    background: color-mix(in srgb, var(--color-cyan) 16%, var(--color-surface-elevated));
}

.matching-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.82fr);
    gap: var(--space-8);
}

.matching-frequencies {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--space-2);
}

.matching-frequencies button,
.clarity-tones button {
    min-height: 5rem;
    padding: var(--space-3);
    display: grid;
    place-items: center;
    align-content: center;
    gap: var(--space-1);
    border-radius: var(--radius-md);
    background: var(--color-surface-elevated);
    text-align: center;
}

.matching-frequencies strong,
.clarity-tones strong {
    font-family: var(--font-measurement);
    font-size: var(--text-sm);
}

.headphone-measurement-note {
    margin-block-start: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
}

.ear-swap-method {
    padding: var(--space-5, 1.25rem);
    display: grid;
    grid-template-columns: 5rem minmax(0, 1fr);
    align-items: center;
    gap: var(--space-5, 1.25rem);
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, #9f8cff 7%, var(--color-surface-elevated));
}

.ear-swap-method__asset {
    width: 5rem;
    height: 5rem;
    object-fit: contain;
}

.ear-swap-method h3 {
    font-size: var(--text-lg);
}

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

.phase-reference {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

.phase-reference button,
.seal-controls button {
    min-height: 7.25rem;
    padding: var(--space-4);
    display: grid;
    place-items: center;
    align-content: center;
    gap: var(--space-2);
    border-radius: var(--radius-lg);
    background: var(--color-surface-elevated);
    text-align: center;
}

.phase-reference button > span {
    color: var(--color-warning);
    font-family: var(--font-measurement);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
}

.phase-reference strong,
.seal-controls strong {
    font-size: var(--text-sm);
}

.seal-layout {
    display: block;
}

.seal-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

.seal-guide {
    margin-block-start: var(--space-4);
    padding-block-start: var(--space-4);
    border-block-start: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.seal-guide a,
.headphone-text-link a,
.headphone-limit-links a,
.processing-list a {
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.clarity-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.42fr);
    align-items: stretch;
    gap: var(--space-5, 1.25rem);
}

.clarity-tones {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(11rem, 1.5fr);
    gap: var(--space-2);
}

.clarity-sweep {
    border-color: color-mix(in srgb, #ff7fb7 38%, var(--color-border)) !important;
}

.clarity-warning {
    padding: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--color-warning) 6%, var(--color-surface-elevated));
    color: color-mix(in srgb, var(--color-warning) 68%, var(--color-text));
    font-size: var(--text-sm);
}

.clarity-warning span {
    width: 0.65rem;
    height: 0.65rem;
    flex: 0 0 auto;
    border-radius: 50%;
    background: var(--color-warning);
}

.headphone-session {
    padding: clamp(1.25rem, 2.4vw, var(--space-8));
    border-block: 1px solid var(--color-border);
}

.headphone-session > header {
    display: grid;
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr);
    align-items: end;
    gap: var(--space-8);
}

.headphone-session h2 {
    font-size: var(--text-2xl);
}

.headphone-session header p {
    color: var(--color-text-secondary);
}

.headphone-session__grid {
    margin-block-start: var(--space-5, 1.25rem);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3) var(--space-6);
}

.headphone-session fieldset {
    min-width: 0;
    padding: 0;
    border: 0;
}

.headphone-session legend {
    margin-block-end: var(--space-2);
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
}

.headphone-session fieldset > div {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.headphone-session input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
}

.headphone-session label {
    min-height: 2.75rem;
    padding: 0.35rem 0.65rem;
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
}

.headphone-session input:focus-visible + label {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

.headphone-session input:checked + label {
    border-color: color-mix(in srgb, var(--color-mint) 55%, var(--color-border));
    background: color-mix(in srgb, var(--color-mint) 9%, var(--color-surface-elevated));
    color: var(--color-text);
}

.headphone-session__actions {
    margin-block-start: var(--space-6);
    padding-block-start: var(--space-5, 1.25rem);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    border-block-start: 1px solid var(--color-border);
}

.headphone-report-action {
    min-height: 3rem;
    flex-shrink: 0;
    padding-inline: var(--space-5, 1.25rem);
    border: 1px solid color-mix(in srgb, var(--color-mint) 56%, var(--color-border));
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--color-mint) 10%, var(--color-surface-elevated));
    color: var(--color-text);
    font: inherit;
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
    cursor: pointer;
}

.headphone-report-action:hover:not(:disabled) {
    border-color: var(--color-mint);
    background: color-mix(in srgb, var(--color-mint) 16%, var(--color-surface-elevated));
}

.headphone-report-action:disabled {
    cursor: wait;
    opacity: 0.62;
}

.headphone-report-status {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.headphone-report-privacy {
    flex-basis: 100%;
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
}

.headphone-report-privacy a {
    color: var(--color-cyan);
}

.headphone-transport {
    position: fixed;
    z-index: 20;
    inset: auto 0 0;
    padding-block: var(--space-3);
    border-block-start: 1px solid color-mix(in srgb, var(--color-mint) 38%, var(--color-border));
    background: rgb(7 10 13 / 0.96);
    box-shadow: 0 -16px 40px rgb(0 0 0 / 0.3);
    transform: translateY(110%);
    visibility: hidden;
}

.headphone-tools[data-playing="true"] .headphone-transport {
    transform: translateY(0);
    visibility: visible;
}

.headphone-transport__inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--space-4);
}

.headphone-transport__pulse {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
    background: var(--color-mint);
    box-shadow: 0 0 0 0.35rem color-mix(in srgb, var(--color-mint) 12%, transparent);
}

.headphone-transport__inner div {
    min-width: 0;
    display: grid;
}

.headphone-transport small {
    color: var(--color-text-secondary);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.headphone-transport strong {
    overflow: hidden;
    font-size: var(--text-sm);
    text-overflow: ellipsis;
    white-space: nowrap;
}

.headphone-intro {
    padding-block: var(--space-8) var(--space-16);
}

.headphone-intro__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(20rem, 0.9fr);
    align-items: start;
    gap: clamp(var(--space-8), 6vw, var(--space-16));
}

.headphone-intro__copy {
    max-width: 48rem;
}

.headphone-intro__copy > p + p {
    margin-block-start: var(--space-4);
}

.headphone-intro__copy p,
.headphone-safety p {
    max-width: none;
}

.headphone-intro__lead {
    color: var(--color-text);
    font-size: var(--text-xl);
    line-height: 1.5;
}

.headphone-intro__copy p:not(.headphone-intro__lead) {
    color: var(--color-text-secondary);
}

.headphone-safety {
    padding: var(--space-5, 1.25rem);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-4);
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 36%, var(--color-border));
}

.headphone-safety__signal {
    width: 0.75rem;
    height: 0.75rem;
    margin-block-start: 0.35rem;
    border-radius: 50%;
    background: var(--color-warning);
}

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

.headphone-safety p {
    margin-block-start: var(--space-2);
    color: color-mix(in srgb, var(--color-warning) 64%, var(--color-text));
    font-size: var(--text-sm);
}

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

.headphone-copy-section--surface,
.headphone-faq {
    background: var(--color-surface);
}

.headphone-copy-section--before {
    padding-block: clamp(var(--space-12), 6vw, var(--space-20));
    border-block: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-cyan) 2.5%, var(--color-surface));
}

.before-test-layout {
    display: grid;
    grid-template-columns: minmax(17rem, 0.55fr) minmax(0, 1.45fr);
    align-items: start;
    gap: clamp(var(--space-8), 7vw, var(--space-20));
}

.before-test-layout h2 {
    margin-block-start: var(--space-3);
}

.before-test-list {
    display: grid;
    gap: 0;
    list-style: none;
}

.before-test-list li {
    position: relative;
    max-width: none;
    padding: var(--space-4) var(--space-4) var(--space-4) 2.25rem;
    border-block-end: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.before-test-list li:first-child {
    border-block-start: 1px solid var(--color-border);
}

.before-test-list li::before {
    content: "";
    position: absolute;
    top: 1.55rem;
    left: 0.2rem;
    width: 0.6rem;
    height: 0.6rem;
    border: 2px solid var(--color-cyan);
    border-radius: 50%;
}

.headphone-section-header {
    margin-block-end: var(--space-8);
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1fr);
    align-items: end;
    gap: var(--space-12);
}

.headphone-section-header > p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

.headphone-steps {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-block-start: 1px solid var(--color-border);
    list-style: none;
}

.headphone-steps li {
    min-width: 0;
    padding: var(--space-5, 1.25rem) var(--space-6) var(--space-5, 1.25rem) 0;
    display: grid;
    grid-template-columns: 2.5rem 1fr;
    gap: var(--space-4);
    border-block-end: 1px solid var(--color-border);
}

.headphone-steps li:nth-child(odd) {
    padding-inline-end: var(--space-8);
    border-inline-end: 1px solid var(--color-border);
}

.headphone-steps li:nth-child(even) {
    padding-inline-start: var(--space-8);
}

.headphone-steps li > span {
    color: var(--color-cyan);
    font-family: var(--font-measurement);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
}

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

.headphone-steps p {
    margin-block-start: var(--space-2);
    color: var(--color-text-secondary);
}

.headphone-technical-row {
    display: grid;
    grid-template-columns: minmax(18rem, 0.72fr) minmax(0, 1.28fr);
    align-items: center;
    gap: clamp(var(--space-12), 8vw, var(--space-24));
}

.channel-map {
    min-height: 18rem;
    display: grid;
    grid-template-columns: auto 1fr auto 1fr auto;
    align-items: center;
    gap: var(--space-2);
}

.channel-map span,
.channel-map b {
    display: grid;
    place-items: center;
    border-radius: 50%;
    font-family: var(--font-measurement);
    font-weight: var(--font-weight-bold);
}

.channel-map span {
    width: 3rem;
    height: 3rem;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.channel-map b {
    width: 4rem;
    height: 4rem;
    border: 2px solid var(--color-cyan);
    background: color-mix(in srgb, var(--color-cyan) 8%, transparent);
    box-shadow: 0 0 0 1rem color-mix(in srgb, var(--color-cyan) 4%, transparent);
}

.channel-map i {
    height: 1px;
    background: linear-gradient(90deg, var(--color-border), var(--color-cyan));
}

.channel-map i:last-of-type {
    background: linear-gradient(90deg, var(--color-cyan), var(--color-border));
}

.headphone-technical-row__copy p,
.headphone-editorial-split p,
.headphone-fit-story__copy p {
    color: var(--color-text-secondary);
}

.headphone-technical-row__copy p,
.headphone-editorial-split p {
    margin-block-start: var(--space-5, 1.25rem);
}

.headphone-editorial-split {
    display: grid;
    grid-template-columns: minmax(18rem, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(var(--space-12), 8vw, var(--space-24));
}

.headphone-editorial-split--reverse {
    grid-template-columns: minmax(18rem, 0.72fr) minmax(0, 1.28fr);
    align-items: center;
}

.phase-wiring-visual {
    min-height: 14rem;
    padding: var(--space-8);
    display: grid;
    grid-template-columns: minmax(2rem, 1fr) auto minmax(2rem, 1fr);
    align-items: center;
    gap: var(--space-4);
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 34%, var(--color-border));
    background: color-mix(in srgb, var(--color-warning) 3%, transparent);
}

.phase-wiring-visual span {
    height: 1px;
    background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--color-warning) 70%, transparent));
}

.phase-wiring-visual span:last-child {
    background: linear-gradient(90deg, color-mix(in srgb, var(--color-warning) 70%, transparent), transparent);
}

.phase-wiring-visual img {
    width: clamp(3.5rem, 7vw, 5rem);
    height: clamp(3.5rem, 7vw, 5rem);
    object-fit: contain;
}

.headphone-fit-story {
    display: grid;
    grid-template-columns: minmax(17rem, 0.7fr) minmax(0, 1fr);
    gap: var(--space-8) clamp(var(--space-12), 8vw, var(--space-24));
}

.headphone-fit-story header .headphone-section-label {
    margin-block-end: var(--space-3);
}

.headphone-fit-story__copy p + p {
    margin-block-start: var(--space-5, 1.25rem);
}

.headphone-fit-story__copy > a {
    margin-block-start: var(--space-6);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.fit-comparison {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    border-block: 1px solid var(--color-border);
}

.fit-comparison > div {
    padding: var(--space-6);
    display: grid;
    gap: var(--space-2);
}

.fit-comparison span {
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.fit-comparison strong {
    font-family: var(--font-display);
    font-size: var(--text-xl);
}

.fit-comparison i {
    width: 2.6rem;
    height: 2.6rem;
    border: 1px solid var(--color-mint);
    border-radius: 50%;
}

.fit-comparison i::before {
    content: "";
    width: 0.65rem;
    height: 0.65rem;
    display: block;
    margin: 0.93rem;
    border-radius: 50%;
    background: var(--color-mint);
}

.headphone-text-link {
    margin-block-start: var(--space-6) !important;
}

.processing-list {
    border-block-start: 1px solid var(--color-border);
}

.processing-list > div {
    padding-block: var(--space-5, 1.25rem);
    display: grid;
    grid-template-columns: minmax(9rem, 12rem) minmax(0, 1fr);
    gap: var(--space-8);
    border-block-end: 1px solid var(--color-border);
}

.processing-list dt {
    font-family: var(--font-display);
    font-weight: var(--font-weight-bold);
}

.processing-list dd {
    max-width: none;
    color: var(--color-text-secondary);
}

.headphone-result-table-wrap {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.headphone-result-table {
    width: 100%;
    min-width: 0;
    table-layout: fixed;
    border-collapse: collapse;
}

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

.headphone-result-table thead th {
    background: var(--color-surface-elevated);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.headphone-result-table tbody th {
    width: 27%;
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.headphone-result-table td {
    width: 36.5%;
    color: var(--color-text-secondary);
}

.headphone-result-table tbody tr:last-child > * {
    border-block-end: 0;
}

.headphone-limits-layout {
    display: grid;
    gap: var(--space-8);
}

.headphone-limits-header {
    margin: 0;
}

.headphone-limits-header h2 {
    max-width: 20ch;
}

.headphone-check-scope h3 {
    margin-block-end: var(--space-4);
    font-size: var(--text-xl);
}

.headphone-check-scope dl {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 var(--space-8);
    border-block-start: 1px solid var(--color-border);
}

.headphone-check-scope dl > div {
    padding-block: var(--space-4);
    border-block-end: 1px solid var(--color-border);
}

.headphone-check-scope dt {
    margin-block-end: var(--space-2);
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
}

.headphone-check-scope dd {
    color: var(--color-text-secondary);
}

.headphone-check-scope dd + dd {
    margin-block-start: var(--space-2);
}

.headphone-check-scope dd strong {
    color: var(--color-text);
}

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

.headphone-measurement-explainer {
    display: grid;
    grid-template-columns: minmax(17rem, 0.7fr) minmax(0, 1.3fr);
    gap: clamp(var(--space-8), 7vw, var(--space-20));
    padding: clamp(var(--space-5, 1.25rem), 3vw, var(--space-8));
    border-block: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-cyan) 2.5%, transparent);
}

.headphone-measurement-explainer h3 {
    font-size: var(--text-xl);
}

.headphone-measurement-explainer p {
    color: var(--color-text-secondary);
}

.headphone-measurement-explainer p + p {
    margin-block-start: var(--space-4);
}

.headphone-limits > div {
    padding: clamp(var(--space-6), 4vw, var(--space-8));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
}

.headphone-limits h3 {
    font-size: var(--text-xl);
}

.headphone-limits ul {
    margin-block-start: var(--space-4);
    padding-inline-start: 1.1rem;
}

.headphone-limits li {
    color: var(--color-text-secondary);
}

.headphone-limits li + li {
    margin-block-start: var(--space-3);
}

.headphone-limit-note {
    width: 100%;
    max-width: none;
    padding: var(--space-5, 1.25rem) 0;
    border-block: 1px solid color-mix(in srgb, var(--color-warning) 30%, var(--color-border));
    color: color-mix(in srgb, var(--color-warning) 64%, var(--color-text));
}

.headphone-limit-links {
    width: 100%;
    max-width: none;
    color: var(--color-text-secondary);
}

.headphone-limits-footer {
    width: 100%;
    display: grid;
    gap: var(--space-4);
}

.headphone-troubleshooting-layout {
    display: grid;
    grid-template-columns: minmax(18rem, 0.65fr) minmax(0, 1.35fr);
    align-items: start;
    gap: clamp(var(--space-8), 7vw, var(--space-20));
}

.headphone-troubleshooting-layout .headphone-section-header {
    margin: 0;
    display: block;
}

.headphone-troubleshooting-layout .headphone-section-header p {
    margin-block-start: var(--space-4);
}

.headphone-troubleshooting-list details,
.headphone-faq__list details {
    border-block-end: 1px solid var(--color-border);
}

.headphone-troubleshooting-list details:first-child,
.headphone-faq__list details:first-child {
    border-block-start: 1px solid var(--color-border);
}

.headphone-troubleshooting-list summary,
.headphone-faq__list summary {
    min-height: 4.25rem;
    padding-block: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    list-style: none;
}

.headphone-troubleshooting-list summary::-webkit-details-marker,
.headphone-faq__list summary::-webkit-details-marker {
    display: none;
}

.headphone-troubleshooting-list summary i,
.headphone-faq__list summary > span:last-child {
    position: relative;
    width: 1.15rem;
    height: 1.15rem;
    flex: 0 0 auto;
}

.headphone-troubleshooting-list summary i::before,
.headphone-troubleshooting-list summary i::after,
.headphone-faq__list summary > span:last-child::before,
.headphone-faq__list summary > span:last-child::after {
    content: "";
    position: absolute;
    inset: 50% 0 auto;
    height: 1px;
    background: var(--color-cyan);
}

.headphone-troubleshooting-list summary i::after,
.headphone-faq__list summary > span:last-child::after {
    transform: rotate(90deg);
    transition: transform var(--duration-fast) var(--ease-standard);
}

.headphone-troubleshooting-list details[open] summary i::after,
.headphone-faq__list details[open] summary > span:last-child::after {
    transform: rotate(0);
}

.headphone-troubleshooting-list details p,
.headphone-faq__list details p {
    padding: 0 var(--space-8) var(--space-5, 1.25rem) 0;
    color: var(--color-text-secondary);
}

.headphone-related-tools {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-block: 1px solid var(--color-border);
}

.headphone-related-tools a {
    min-width: 0;
    padding: var(--space-5, 1.25rem);
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: var(--space-3);
    text-decoration: none;
}

.headphone-related-tools a:not(:last-child) {
    border-inline-end: 1px solid var(--color-border);
}

.headphone-related-tools strong {
    font-family: var(--font-display);
    font-size: var(--text-lg);
}

.headphone-related-tools span {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.headphone-related-tools i {
    color: var(--color-cyan);
    font-style: normal;
}

.headphone-related-tools a:hover {
    background: color-mix(in srgb, var(--color-cyan) 5%, transparent);
}

.headphone-faq__layout {
    display: block;
}

.headphone-faq__columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: clamp(var(--space-8), 4vw, var(--space-12));
}

.headphone-faq__header {
    margin: 0 0 clamp(var(--space-8), 5vw, var(--space-12));
    display: block;
}

.headphone-faq__header p {
    margin-block-start: var(--space-4);
}

.headphone-faq__list summary {
    min-height: 4.5rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 2.5rem;
    gap: var(--space-4);
}

.headphone-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%;
}

.headphone-faq__list summary > span:last-child::before,
.headphone-faq__list summary > span:last-child::after {
    inset-inline: 0.62rem;
}

.headphone-faq__list details p {
    max-width: none;
    padding: var(--space-1) 4.25rem var(--space-6) 0;
}

.headphone-faq__close {
    max-width: none;
    margin-block-start: var(--space-10, 2.5rem);
    color: var(--color-text-secondary);
}

@keyframes headphone-level {
    from { transform: scaleY(0.55); }
    to { transform: scaleY(1.08); }
}

@keyframes headphone-pan {
    0% {
        left: 1rem;
        animation-timing-function: cubic-bezier(0.45, 0, 0.55, 1);
    }
    50% {
        left: calc(100% - 1rem);
        animation-timing-function: cubic-bezier(0.45, 0, 0.55, 1);
    }
    100% { left: 1rem; }
}

@media (max-width: 68rem) {
    .headphone-primary-footer {
        grid-template-columns: minmax(12rem, 1fr) minmax(14rem, 1fr);
    }

    .headphone-stop {
        grid-column: 1 / -1;
    }

    .headphone-tool__split,
    .matching-layout,
    .clarity-layout {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .clarity-tones {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }

    .headphone-related-tools {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .headphone-related-tools a {
        border-block-end: 1px solid var(--color-border);
    }

    .headphone-related-tools a:nth-child(3) {
        border-inline-end: 0;
    }
}

@media (max-width: 54rem) {
    .headphone-tools__pair,
    .headphone-intro__layout,
    .before-test-layout,
    .headphone-section-header,
    .headphone-technical-row,
    .headphone-editorial-split,
    .headphone-editorial-split--reverse,
    .headphone-fit-story,
    .headphone-troubleshooting-layout,
    .headphone-faq__layout {
        grid-template-columns: 1fr;
    }

    .headphone-channel-stage {
        min-height: 11.5rem;
    }

    .headphone-primary-footer {
        gap: var(--space-4);
    }

    .matching-frequencies {
        grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
    }

    .headphone-session > header {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .headphone-session__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .headphone-technical-row__visual,
    .phase-wiring-visual {
        min-height: 10rem;
    }

    .headphone-fit-story__copy {
        max-width: 72ch;
    }

    .headphone-faq__columns {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

@media (max-width: 42rem) {
    .headphone-hero {
        padding-block: var(--space-8) var(--space-5, 1.25rem);
    }

    .headphone-hero__eyebrow {
        font-size: 0.67rem;
    }

    .headphone-tool {
        border-radius: var(--radius-lg);
    }

    .headphone-tool__header--primary {
        align-items: flex-start;
        gap: var(--space-3);
    }

    .headphone-tool__asset {
        display: none;
    }

    .headphone-console__state {
        min-height: 2.15rem;
        padding-inline: var(--space-3);
        font-size: 0.68rem;
    }

    .headphone-channel-stage {
        min-height: auto;
        padding: var(--space-3);
        gap: var(--space-2);
    }

    .headphone-channel {
        min-height: 8.5rem;
        padding: var(--space-3) var(--space-2);
    }

    .headphone-channel__position {
        width: 2.7rem;
        height: 2.7rem;
    }

    .headphone-channel__position img {
        width: 2.25rem;
        height: 2.25rem;
    }

    .headphone-channel small {
        font-size: 0.66rem;
    }

    .headphone-primary-footer {
        grid-template-columns: 1fr;
    }

    .headphone-stop {
        grid-column: auto;
    }

    .headphone-tool__split {
        gap: var(--space-5, 1.25rem);
    }

    .movement-instrument__track {
        height: 3.8rem;
    }

    .headphone-tool__footer-row {
        align-items: stretch;
        flex-direction: column;
    }

    .headphone-action {
        width: 100%;
    }

    .ear-swap-method {
        grid-template-columns: 4.25rem minmax(0, 1fr);
        padding: var(--space-4);
        gap: var(--space-4);
    }

    .ear-swap-method__asset {
        width: 4.25rem;
        height: 4.25rem;
    }

    .matching-frequencies {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .phase-reference,
    .seal-controls {
        grid-template-columns: 1fr;
    }

    .phase-reference button,
    .seal-controls button {
        min-height: 5.75rem;
    }

    .clarity-tones {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .clarity-sweep {
        grid-column: 1 / -1;
    }

    .headphone-session__grid,
    .headphone-steps,
    .headphone-limits,
    .headphone-measurement-explainer,
    .headphone-check-scope dl {
        grid-template-columns: 1fr;
    }

    .headphone-session fieldset > div {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .headphone-session label {
        justify-content: center;
        text-align: center;
    }

    .headphone-session__actions {
        align-items: stretch;
        flex-direction: column;
    }

    .headphone-report-action {
        width: 100%;
    }

    .headphone-intro {
        padding-block: var(--space-6) var(--space-12);
    }

    .headphone-intro__lead {
        font-size: var(--text-lg);
    }

    .headphone-section-header {
        gap: var(--space-4);
    }

    .headphone-section-header > p {
        font-size: var(--text-base);
    }

    .headphone-steps li,
    .headphone-steps li:nth-child(odd),
    .headphone-steps li:nth-child(even) {
        padding-inline: 0;
        border-inline-end: 0;
    }

    .fit-comparison {
        grid-template-columns: 1fr;
    }

    .fit-comparison i {
        justify-self: center;
    }

    .processing-list > div {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }

    .headphone-faq__list details p {
        padding-inline-end: 0;
    }

    .headphone-faq__list + .headphone-faq__list details:first-child {
        border-block-start: 0;
    }

    .headphone-result-table-wrap {
        overflow: visible;
        border: 0;
    }

    .headphone-result-table,
    .headphone-result-table tbody,
    .headphone-result-table tr,
    .headphone-result-table th,
    .headphone-result-table td {
        width: 100%;
        min-width: 0;
        display: block;
    }

    .headphone-result-table thead {
        display: none;
    }

    .headphone-result-table tr {
        padding-block: var(--space-4);
        border-block-end: 1px solid var(--color-border);
    }

    .headphone-result-table th,
    .headphone-result-table td {
        padding: var(--space-2) 0;
        border: 0;
    }

    .headphone-result-table td::before {
        content: attr(data-label);
        margin-block-end: var(--space-1);
        display: block;
        color: var(--color-cyan);
        font-size: 0.65rem;
        font-weight: var(--font-weight-bold);
        letter-spacing: 0.08em;
        text-transform: uppercase;
    }

    .headphone-related-tools {
        grid-template-columns: 1fr;
    }

    .headphone-related-tools a,
    .headphone-related-tools a:nth-child(3) {
        border-inline-end: 0;
    }

    .headphone-transport__inner {
        gap: var(--space-3);
    }

    .headphone-transport button {
        min-height: 2.6rem;
        padding-inline: var(--space-3);
    }
}

@media (max-width: 25rem) {
    .headphone-tool__header--primary {
        display: grid;
    }

    .headphone-console__state {
        width: 100%;
        justify-content: center;
    }

    .headphone-channel {
        min-height: 7.8rem;
    }

    .headphone-channel strong {
        font-size: var(--text-sm);
    }

    .headphone-channel__signal {
        display: none;
    }

    .headphone-session fieldset > div {
        grid-template-columns: 1fr;
    }

    .ear-swap-method {
        grid-template-columns: 1fr;
    }

    .ear-swap-method__asset {
        justify-self: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .headphone-channel[aria-pressed="true"] .headphone-channel__signal i,
    .headphone-tools[data-active-test="stereo-movement"] .movement-instrument__track i,
    .headphone-tools[data-active-test="stereo-movement"] .movement-instrument__trail {
        animation: none;
    }

    .headphone-tools[data-active-test="stereo-movement"] .movement-instrument__track i,
    .headphone-tools[data-active-test="stereo-movement"] .movement-instrument__trail {
        left: 50%;
    }

    .headphone-tools[data-active-test="stereo-movement"] .movement-instrument__trail {
        opacity: 0.18;
    }
}