:root {
    --first-session-amber: #f2b84b;
    --first-session-amber-soft: #ffdb8a;
    --first-session-good: #65dfbd;
    --first-session-danger: #ff9b8e;
    --first-session-page: #06111f;
    --first-session-panel: #0a192a;
    --first-session-panel-strong: #0d2034;
    --first-session-border: #28465c;
    --first-session-text: #eef6ff;
    --first-session-muted: #afc2d4;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.first-session-page {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    padding-top: var(--mpt-header-offset, 77px);
    color: var(--first-session-text);
    background: var(--first-session-page);
    font-family: var(--mtp-font-sans, "Helvetica Neue", sans-serif);
}

[hidden] { display: none !important; }
.first-session-interactive { display: none !important; }
.js-enabled .first-session-interactive:not([hidden]) { display: block !important; }

.first-session-page a { color: inherit; }

.first-session-page :focus-visible {
    outline: 3px solid var(--first-session-amber);
    outline-offset: 4px;
}

.first-session-skip {
    position: fixed;
    top: 0.5rem;
    left: 0.75rem;
    z-index: 10000;
    padding: 0.75rem 1rem;
    color: #171005;
    background: var(--first-session-amber);
    font-weight: 800;
    transform: translateY(-160%);
}

.first-session-page .first-session-skip { color: #171005; }

.first-session-skip:focus { transform: translateY(0); }

.first-session-shell {
    width: min(1080px, calc(100% - 2rem));
    margin-inline: auto;
    padding: clamp(2.5rem, 7vw, 5.5rem) 0 clamp(4rem, 8vw, 7rem);
}

.first-session-heading {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    gap: clamp(1.5rem, 5vw, 4rem);
    align-items: end;
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.first-session-heading .first-session-kicker { grid-column: 1 / -1; margin-bottom: -0.4rem; }

.first-session-heading h1 {
    max-width: 11ch;
    margin: 0;
    font-size: clamp(3rem, 8.5vw, 6.6rem);
    line-height: 0.93;
    letter-spacing: -0.065em;
}

.first-session-lead {
    max-width: 38ch;
    margin: 0 0 0.35rem;
    color: #c5d6e5;
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    line-height: 1.65;
}

.first-session-kicker,
.first-session-step-label,
.first-session-status-label,
.first-session-feedback-label,
.first-session-result-readout dt {
    font-family: var(--mtp-font-mono, ui-monospace, monospace);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.first-session-kicker { margin: 0 0 0.8rem; color: var(--home-accent, #4bd9ec); }

.first-session-step-label {
    margin: 0 0 1rem;
    color: var(--first-session-amber-soft);
}

.first-session-step-label span { margin-right: 0.55rem; color: var(--first-session-amber); }

.first-session-card {
    border: 1px solid var(--first-session-border);
    border-top: 3px solid var(--first-session-amber);
    background: var(--first-session-panel);
    box-shadow: 14px 16px 0 #030b14;
}

.first-session-setup,
.first-session-session,
.first-session-error,
.first-session-complete,
.first-session-noscript { padding: clamp(1.25rem, 4vw, 2.5rem); }

.first-session-setup { border-top-color: var(--home-accent, #4bd9ec); }

#firstSessionPanel,
#audioErrorPanel,
#firstSessionComplete { scroll-margin-top: calc(var(--mpt-header-offset, 77px) + 1rem); }

.first-session-experience { min-width: 0; margin: 0; padding: 0; border: 0; }

.first-session-experience legend,
.first-session-answers legend {
    padding: 0;
    font-size: clamp(1.35rem, 2.7vw, 2rem);
    font-weight: 750;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.first-session-hint { margin: 0.55rem 0 1.1rem; color: var(--first-session-muted); line-height: 1.55; }

.first-session-radio-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
}

.first-session-radio-grid label {
    position: relative;
    min-width: 0;
    cursor: pointer;
}

.first-session-radio-grid input {
    position: absolute;
    inset: 1rem auto auto 1rem;
    width: 1.15rem;
    height: 1.15rem;
    margin: 0;
    accent-color: var(--first-session-amber);
}

.first-session-radio-grid label > span {
    min-height: 112px;
    display: block;
    padding: 1rem 1rem 1rem 2.75rem;
    border: 1px solid var(--first-session-border);
    background: #081625;
}

.first-session-radio-grid strong,
.first-session-radio-grid small { display: block; }

.first-session-radio-grid strong { line-height: 1.35; }
.first-session-radio-grid small { margin-top: 0.45rem; color: var(--first-session-muted); font-size: 0.86rem; line-height: 1.45; }
.first-session-radio-grid label:hover > span { border-color: #4b7189; background: #0d2034; }
.first-session-radio-grid input:checked + span { border-color: var(--first-session-amber); box-shadow: inset 4px 0 0 var(--first-session-amber); }
.first-session-radio-grid input:focus-visible + span { outline: 3px solid var(--first-session-amber); outline-offset: 3px; }

.first-session-start-row {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.5rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--first-session-border);
}

.first-session-button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    max-width: 100%;
    padding: 0.78rem 1rem;
    border: 1px solid var(--first-session-border);
    border-radius: 4px;
    color: var(--first-session-text);
    background: #0b1d30;
    font: 750 0.95rem/1.25 var(--mtp-font-sans, "Helvetica Neue", sans-serif);
    text-align: center;
    text-decoration: none;
    cursor: pointer;
}

.first-session-button:hover:not(:disabled) { border-color: var(--home-accent, #4bd9ec); background: #112b40; }

.first-session-button--primary {
    border-color: var(--home-accent, #4bd9ec);
    color: #03151d;
    background: var(--home-accent, #4bd9ec);
}

.first-session-page a.first-session-button--primary { color: #03151d; }

.first-session-button--primary:hover:not(:disabled) { background: #8bedf6; }

.first-session-button--quiet { min-width: 94px; }

.first-session-button:disabled,
.first-session-answers:disabled button {
    cursor: not-allowed;
    opacity: 0.52;
}

.first-session-text-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    color: var(--home-accent, #4bd9ec);
    font-weight: 750;
    text-underline-offset: 0.28em;
}

.first-session-text-link:hover { color: #a4eff8; }

.first-session-audio-notice {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin: 0.8rem 0 0;
    color: var(--first-session-muted);
    font-size: 0.88rem;
}

.first-session-signal {
    width: 0.62rem;
    height: 0.62rem;
    flex: 0 0 auto;
    border: 2px solid var(--first-session-amber);
    background: transparent;
}

.first-session-card-head,
.first-session-result-intro {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2rem;
}

.first-session-card-head h2,
.first-session-error h2,
.first-session-complete h2 {
    margin: 0;
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    line-height: 1;
    letter-spacing: -0.045em;
}

.first-session-progress {
    flex: 0 0 auto;
    margin: 0;
    padding: 0.7rem 0.8rem;
    border-left: 3px solid var(--first-session-amber);
    color: var(--first-session-muted);
    background: #071522;
    font-family: var(--mtp-font-mono, ui-monospace, monospace);
    font-size: 0.82rem;
}

.first-session-progress strong { color: var(--first-session-text); }

.first-session-listening-stage {
    display: grid;
    grid-template-columns: minmax(240px, 0.72fr) minmax(360px, 1.28fr);
    gap: 1.25rem;
    align-items: center;
    margin: 2rem 0;
    padding: clamp(1rem, 3vw, 1.5rem);
    border-block: 1px solid var(--first-session-border);
    background: #071522;
}

.first-session-status-block { display: flex; align-items: center; gap: 0.9rem; min-width: 0; }

.first-session-status-light {
    width: 1rem;
    height: 1rem;
    flex: 0 0 auto;
    border: 3px solid #06111f;
    outline: 2px solid var(--first-session-amber);
    background: var(--first-session-amber);
}

.first-session-status-label,
.first-session-feedback-label { color: var(--first-session-muted); }
.first-session-status-block p { margin: 0.25rem 0 0; font-weight: 700; line-height: 1.4; }

.first-session-audio-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
}

.first-session-volume {
    min-width: 170px;
    display: grid;
    grid-template-columns: auto minmax(90px, 1fr);
    gap: 0.7rem;
    align-items: center;
    color: var(--first-session-muted);
    font-size: 0.86rem;
    font-weight: 700;
}

.first-session-volume input { width: 100%; min-height: 44px; accent-color: var(--first-session-amber); cursor: pointer; }

.first-session-page kbd {
    min-width: 1.55rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.12rem 0.3rem;
    border: 1px solid #526a7c;
    border-bottom-width: 2px;
    border-radius: 3px;
    color: #dbe9f4;
    background: #06111f;
    font: 700 0.72rem/1.2 var(--mtp-font-mono, ui-monospace, monospace);
}

.first-session-answers { min-width: 0; margin: 0; padding: 0; border: 0; }

.first-session-answer-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
}

.first-session-answer-grid button {
    position: relative;
    min-width: 0;
    min-height: 96px;
    padding: 1.2rem 0.75rem;
    border: 1px solid var(--first-session-border);
    border-radius: 3px;
    color: var(--first-session-text);
    background: var(--first-session-panel-strong);
    font: 800 clamp(1.5rem, 4vw, 2.2rem)/1 var(--mtp-font-sans, "Helvetica Neue", sans-serif);
    cursor: pointer;
}

.first-session-answer-grid button kbd { position: absolute; top: 0.55rem; left: 0.55rem; }
.first-session-answer-grid button:hover:not(:disabled) { border-color: var(--first-session-amber); background: #122a3e; }
.first-session-answer-grid button[aria-pressed="true"] { border-color: var(--first-session-amber); box-shadow: inset 0 -4px 0 var(--first-session-amber); }
.first-session-answer-grid button[data-result="correct"] { border-color: var(--first-session-good); box-shadow: inset 0 -4px 0 var(--first-session-good); }
.first-session-answer-grid button[data-result="incorrect"] { border-color: var(--first-session-danger); box-shadow: inset 0 -4px 0 var(--first-session-danger); }

.first-session-feedback-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: end;
    min-height: 98px;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--first-session-border);
}

.first-session-feedback p { min-height: 1.5em; margin: 0.35rem 0 0; color: #d6e3ee; line-height: 1.5; }
.first-session-feedback[data-tone="correct"] { padding-left: 1rem; border-left: 4px solid var(--first-session-good); }
.first-session-feedback[data-tone="retry"] { padding-left: 1rem; border-left: 4px solid var(--first-session-amber); }

.first-session-error { max-width: 800px; margin-inline: auto; border-top-color: var(--first-session-danger); }
.first-session-error > p:not(.first-session-step-label) { max-width: 60ch; color: var(--first-session-muted); line-height: 1.6; }
.first-session-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

.first-session-result-intro > div:first-child > p:last-child { max-width: 46ch; color: var(--first-session-muted); line-height: 1.55; }

.first-session-result-readout {
    display: grid;
    grid-template-columns: repeat(3, minmax(90px, 1fr));
    min-width: min(100%, 420px);
    margin: 0;
    border: 1px solid var(--first-session-border);
}

.first-session-result-readout div { min-width: 0; padding: 1rem; border-left: 1px solid var(--first-session-border); }
.first-session-result-readout div:first-child { border-left: 0; }
.first-session-result-readout dt { color: var(--first-session-muted); }
.first-session-result-readout dd { margin: 0.4rem 0 0; overflow-wrap: anywhere; font-size: clamp(1.1rem, 2.2vw, 1.5rem); font-weight: 800; }

.first-session-recommendation {
    margin-top: 2rem;
    padding: clamp(1.25rem, 3vw, 2rem);
    border-left: 4px solid var(--home-accent, #4bd9ec);
    background: #071522;
}

.first-session-recommendation h3 { margin: 0; font-size: clamp(1.6rem, 3.6vw, 2.6rem); letter-spacing: -0.035em; }
.first-session-recommendation > p:not(.first-session-kicker) { max-width: 64ch; margin: 0.75rem 0 1.25rem; color: var(--first-session-muted); line-height: 1.6; }

.first-session-result-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.first-session-result-actions .first-session-text-link { margin-left: auto; }

.first-session-access-note {
    display: flex;
    gap: 0.75rem 1rem;
    margin-top: 2rem;
    padding: 1rem 0;
    border-block: 1px solid var(--first-session-border);
    color: var(--first-session-muted);
    line-height: 1.5;
}

.first-session-access-note strong { color: var(--first-session-text); }
.first-session-access-note a { color: var(--home-accent, #4bd9ec); text-underline-offset: 0.25em; }

.first-session-noscript { max-width: 820px; margin-inline: auto; }
.first-session-noscript h2 { margin: 0; font-size: clamp(1.65rem, 4vw, 2.5rem); line-height: 1.05; letter-spacing: -0.035em; }
.first-session-noscript > p:not(.first-session-kicker) { color: var(--first-session-muted); font-size: 1.1rem; line-height: 1.6; }
.first-session-noscript nav { display: flex; flex-wrap: wrap; gap: 0.7rem 1.25rem; margin-top: 1.5rem; }
.first-session-noscript nav a { min-height: 44px; display: inline-flex; align-items: center; color: var(--home-accent, #4bd9ec); font-weight: 700; }

@media (max-width: 800px) {
    .first-session-heading { grid-template-columns: 1fr; gap: 1.25rem; }
    .first-session-heading .first-session-kicker { grid-column: auto; margin-bottom: -0.25rem; }
    .first-session-heading h1 { font-size: clamp(3rem, 14vw, 5.2rem); }
    .first-session-radio-grid { grid-template-columns: 1fr; }
    .first-session-radio-grid label > span { min-height: 88px; }
    .first-session-listening-stage { grid-template-columns: 1fr; }
    .first-session-audio-controls { justify-content: flex-start; flex-wrap: wrap; }
    .first-session-volume { flex: 1 1 210px; }
    .first-session-result-intro { flex-direction: column; }
    .first-session-result-readout { width: 100%; }
}

@media (max-width: 560px) {
    .first-session-shell { width: min(100% - 1rem, 1080px); padding-top: 2rem; }
    .first-session-heading { margin-inline: 0.5rem; }
    .first-session-heading h1 { font-size: clamp(2.85rem, 15vw, 4.4rem); }
    .first-session-setup,
    .first-session-session,
    .first-session-error,
    .first-session-complete,
    .first-session-noscript { padding: 1rem; }
    .first-session-card { box-shadow: 6px 8px 0 #030b14; }
    .first-session-start-row { align-items: stretch; flex-direction: column; }
    .first-session-start-row .first-session-button,
    .first-session-start-row .first-session-text-link { width: 100%; justify-content: center; }
    .first-session-card-head { gap: 1rem; }
    .first-session-card-head h2 { font-size: 2rem; }
    .first-session-progress { padding: 0.6rem; }
    .first-session-audio-controls { display: grid; grid-template-columns: 1fr 1fr; }
    .first-session-volume { grid-column: 1 / -1; width: 100%; }
    .first-session-button--quiet { min-width: 0; }
    .first-session-answer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .first-session-answer-grid button { min-height: 82px; }
    .first-session-feedback-row { grid-template-columns: 1fr; }
    .first-session-feedback-row .first-session-button { width: 100%; }
    .first-session-result-readout { grid-template-columns: 1fr 1fr; }
    .first-session-result-readout div { border-bottom: 1px solid var(--first-session-border); }
    .first-session-result-readout div:nth-child(3) { grid-column: 1 / -1; border-left: 0; border-bottom: 0; }
    .first-session-result-actions { align-items: stretch; flex-direction: column; }
    .first-session-result-actions .first-session-button,
    .first-session-result-actions .first-session-text-link { width: 100%; justify-content: center; margin-left: 0; text-align: center; }
    .first-session-access-note { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

@media (forced-colors: active) {
    .first-session-card,
    .first-session-radio-grid input:checked + span,
    .first-session-answer-grid button[data-result] { border-color: CanvasText; }
    .first-session-signal,
    .first-session-status-light { background: CanvasText; }
}