:root {
    --ink: #0b1220;
    --ink-2: #162033;
    --paper: #f7f8fb;
    --white: #ffffff;
    --muted: #667085;
    --line: #dfe3ea;
    --lime: #b9f542;
    --lime-deep: #8fcc1c;
    --cyan: #72e5f2;
    --danger: #e5484d;
    --radius: 22px;
    --shadow: 0 28px 80px rgba(11, 18, 32, .13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
button, select, textarea, input { font: inherit; }
button, label, summary { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
[hidden] { display: none !important; }

.skip-link { position: fixed; left: 1rem; top: -4rem; z-index: 1000; background: var(--white); padding: .7rem 1rem; border-radius: 10px; }
.skip-link:focus { top: 1rem; }
.section-shell { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(223,227,234,.8); background: rgba(247,248,251,.88); backdrop-filter: blur(16px); }
.nav-shell { width: min(1240px, calc(100% - 40px)); height: 76px; margin: auto; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 1.22rem; font-weight: 780; letter-spacing: -.035em; text-decoration: none; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 11px; background: var(--ink); color: var(--lime); }
.brand-mark svg { width: 31px; height: 31px; fill: none; stroke: currentColor; stroke-width: 2.6; stroke-linecap: round; }
.desktop-nav { margin-left: auto; display: flex; gap: 28px; }
.desktop-nav a { position: relative; color: #364152; font-weight: 600; font-size: .9rem; text-decoration: none; }
.desktop-nav a::after { content: ""; position: absolute; inset: auto 0 -8px; height: 2px; background: var(--ink); transform: scaleX(0); transition: transform .2s; }
.desktop-nav a:hover::after { transform: scaleX(1); }

.language-menu { position: relative; }
.language-menu summary { list-style: none; display: flex; align-items: center; gap: 7px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); cursor: pointer; font-size: .88rem; font-weight: 750; }
.language-menu summary::-webkit-details-marker { display: none; }
.globe { font-size: 1.25rem; line-height: 1; }
.chevron { color: var(--muted); transform: translateY(-1px); }
.language-popover { position: absolute; right: 0; top: calc(100% + 10px); width: 210px; padding: 8px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); box-shadow: var(--shadow); }
.language-popover a { display: flex; justify-content: space-between; align-items: center; padding: 10px 11px; border-radius: 10px; text-decoration: none; font-size: .92rem; }
.language-popover a:hover, .language-popover a[aria-current="page"] { background: #eff3f8; }
.language-popover small { color: var(--muted); font-size: .7rem; font-weight: 800; }

.hero { padding: 46px 0 82px; }
.hero-copy { max-width: 790px; margin: 0 auto 34px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 7px; color: #4a5568; font-size: .76rem; font-weight: 820; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow > span { color: var(--lime-deep); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 12px 0 13px; font-size: clamp(2.6rem, 5.2vw, 4.75rem); line-height: .98; letter-spacing: -.065em; font-weight: 790; text-wrap: balance; }
.hero-copy p { margin: 0 auto; max-width: 690px; color: #536074; font-size: clamp(1.05rem, 2vw, 1.22rem); line-height: 1.6; text-wrap: balance; }

.tool-card { max-width: 900px; margin: 0 auto; padding: 14px; border: 1px solid #cfd6e1; border-radius: 28px; background: var(--white); box-shadow: var(--shadow); }
.drop-zone { min-height: 205px; border: 1.5px dashed #aab4c3; border-radius: 18px; background: linear-gradient(135deg, #fbfcfe 0%, #f3f6fa 100%); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 20px 26px; text-align: center; cursor: pointer; transition: border-color .2s, background .2s, transform .2s; }
.drop-zone:hover, .drop-zone.dragging { border-color: var(--lime-deep); background: #f7fde9; }
.drop-zone.dragging { transform: scale(.995); }
.drop-zone.has-file { border-style: solid; border-color: #b9c3d1; background: #f8fafc; }
.upload-icon { width: 58px; height: 58px; margin-bottom: 15px; display: grid; place-items: center; border-radius: 17px; color: var(--ink); background: var(--lime); box-shadow: 0 10px 24px rgba(143,204,28,.24); }
.upload-icon svg { width: 35px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.drop-zone strong { display: block; font-size: 1.2rem; line-height: 1.3; letter-spacing: -.02em; }
.file-meta { margin: 5px 0 18px; max-width: 560px; color: var(--muted); font-size: .88rem; overflow-wrap: anywhere; }
.secondary-button { display: inline-flex; align-items: center; justify-content: center; padding: 10px 17px; border: 1px solid #cfd6df; border-radius: 11px; background: var(--white); color: var(--ink); font-weight: 750; cursor: pointer; text-decoration: none; }
.secondary-button:hover { border-color: #97a3b3; background: #f7f8fa; }
.tool-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.select-label { min-height: 64px; display: flex; align-items: center; gap: 14px; padding: 9px 14px; border: 1px solid var(--line); border-radius: 14px; }
.select-label > span { color: var(--muted); font-size: .82rem; font-weight: 700; white-space: nowrap; }
.select-label select { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font-weight: 720; cursor: pointer; }
.primary-button { min-height: 64px; border: 0; border-radius: 14px; background: var(--ink); color: var(--white); display: inline-flex; align-items: center; justify-content: center; gap: 10px; font-weight: 780; cursor: pointer; transition: transform .18s, background .18s, opacity .18s; }
.primary-button svg { width: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.primary-button:hover:not(:disabled) { background: #1d2a42; transform: translateY(-1px); }
.primary-button:disabled { cursor: not-allowed; opacity: .38; }
.trust-line { display: flex; justify-content: center; gap: 8px; margin: 14px 4px 2px; color: var(--muted); font-size: .78rem; text-align: center; }
.trust-line span { color: #559805; font-weight: 900; }

.state-panel { min-height: 365px; padding: 55px 30px 32px; border-radius: 18px; background: var(--ink); color: var(--white); text-align: center; }
.state-panel h2 { margin: 17px 0 7px; font-size: 1.7rem; letter-spacing: -.035em; }
.state-panel p { color: #aeb9cb; }
.processing-visual { height: 54px; display: flex; align-items: center; justify-content: center; gap: 6px; }
.processing-visual span { width: 5px; height: 18px; border-radius: 6px; background: var(--lime); animation: waveform .95s ease-in-out infinite alternate; }
.processing-visual span:nth-child(2), .processing-visual span:nth-child(6) { animation-delay: -.25s; height: 33px; }
.processing-visual span:nth-child(3), .processing-visual span:nth-child(5) { animation-delay: -.5s; height: 48px; }
.processing-visual span:nth-child(4) { animation-delay: -.72s; height: 26px; }
.processing-visual span:nth-child(7) { animation-delay: -.1s; }
@keyframes waveform { to { transform: scaleY(.35); opacity: .55; } }
.progress-track { width: min(520px, 90%); height: 6px; margin: 30px auto 9px; overflow: hidden; border-radius: 99px; background: #283449; }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--lime); transition: width .3s ease; }
.progress-meta { width: min(520px, 90%); margin: auto; display: flex; justify-content: space-between; color: #8190a6; font-size: .75rem; }
.error-panel { background: #251519; }
.error-icon { width: 48px; height: 48px; margin: 0 auto; display: grid; place-items: center; border-radius: 50%; background: #4a2025; color: #ffb4b7; font-size: 1.4rem; font-weight: 850; }
.error-panel .secondary-button { margin-top: 14px; }

.results { padding: 10px 0 100px; }
.result-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 24px; }
.result-heading h2 { margin: 5px 0 0; font-size: clamp(2rem, 4vw, 3.5rem); letter-spacing: -.055em; }
.result-stats { display: flex; gap: 9px; flex-wrap: wrap; }
.result-stats span { padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--white); font-size: .78rem; font-weight: 680; }
.audio-dock { display: flex; align-items: center; gap: 16px; padding: 14px 18px; border-radius: 16px 16px 0 0; background: var(--ink); color: var(--white); }
.play-button { width: 46px; height: 46px; flex: 0 0 auto; display: grid; place-items: center; border: 0; border-radius: 50%; background: var(--lime); color: var(--ink); cursor: pointer; }
.play-button svg { grid-area: 1 / 1; width: 24px; fill: currentColor; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; }
.play-button .pause-shape { display: none; fill: none; }
.play-button.playing .play-shape { display: none; }
.play-button.playing .pause-shape { display: block; }
.audio-time { width: 100%; display: grid; grid-template-columns: 42px 1fr 42px; align-items: center; gap: 10px; font-size: .73rem; color: #aeb9cb; font-variant-numeric: tabular-nums; }
.audio-progress { height: 18px; display: flex; align-items: center; cursor: pointer; }
.audio-progress::before { content: ""; width: 100%; height: 4px; border-radius: 99px; background: #3a465a; }
.audio-progress > span { position: absolute; height: 4px; width: 0; border-radius: 99px; background: var(--lime); pointer-events: none; }
.transcript-shell { border: 1px solid var(--line); border-top: 0; border-radius: 0 0 18px 18px; background: var(--white); }
.transcript-toolbar { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); }
.tabs { display: flex; padding: 4px; border-radius: 10px; background: #eef1f5; }
.tab { padding: 8px 14px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); font-weight: 720; cursor: pointer; }
.tab.active { background: var(--white); color: var(--ink); box-shadow: 0 2px 7px rgba(11,18,32,.08); }
.copy-button { display: inline-flex; align-items: center; gap: 7px; border: 0; background: transparent; color: #465367; font-weight: 680; cursor: pointer; }
.copy-button svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.karaoke-view, .plain-view { width: 100%; min-height: 310px; max-height: 540px; overflow: auto; padding: clamp(24px, 5vw, 52px); }
.karaoke-view { color: #7c8797; font-size: clamp(1.35rem, 3vw, 2.25rem); font-weight: 640; letter-spacing: -.025em; line-height: 1.75; }
.karaoke-view .word { display: inline; padding: 3px 2px; border-radius: 5px; cursor: pointer; transition: color .12s, background .12s; }
.karaoke-view .word:hover { color: var(--ink); background: #edf2f7; }
.karaoke-view .word.spoken { color: #364152; }
.karaoke-view .word.active { color: var(--ink); background: var(--lime); box-shadow: 0 0 0 2px var(--lime); }
.plain-view { resize: vertical; border: 0; outline: 0; color: var(--ink); font-size: 1.05rem; line-height: 1.75; }
.downloads-block { margin: 26px 0; padding: 25px; border-radius: 18px; background: #eaf0f7; }
.downloads-block h3 { margin: 4px 0 18px; font-size: 1.4rem; letter-spacing: -.03em; }
.download-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.download-card { min-height: 108px; display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 10px; padding: 14px; border: 1px solid #d2d9e3; border-radius: 13px; background: var(--white); color: var(--ink); text-align: left; cursor: pointer; transition: transform .18s, border-color .18s; }
.download-card:hover { transform: translateY(-2px); border-color: #8d99aa; }
.file-badge { grid-column: 1 / -1; color: #6c7788; font-size: .7rem; font-weight: 850; letter-spacing: .1em; }
.download-card > span:nth-child(2) { font-size: .84rem; font-weight: 760; }
.download-card svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.results > .reset-button { width: 100%; min-height: 52px; }

.editor-tools { display: flex; align-items: end; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line); background: #f8fafc; }
.editor-tools label { flex: 1; color: var(--muted); font-size: .74rem; font-weight: 750; }
.editor-tools input { width: 100%; margin-top: 4px; padding: 9px 10px; border: 1px solid #cfd6df; border-radius: 9px; background: var(--white); color: var(--ink); }

.breadcrumbs { display: flex; gap: 9px; align-items: center; padding-top: 28px; color: var(--muted); font-size: .82rem; }
.breadcrumbs a { color: #344054; text-decoration: none; }
.capability-strip { margin-top: -48px; margin-bottom: 72px; display: grid; grid-template-columns: 1.15fr 1fr 1fr; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: var(--white); }
.capability-strip div { padding: 17px 20px; border-right: 1px solid var(--line); }
.capability-strip div:last-child { border-right: 0; }
.capability-strip strong, .capability-strip span { display: block; }
.capability-strip strong { margin-bottom: 3px; font-size: .78rem; }
.capability-strip span { color: var(--muted); font-size: .74rem; line-height: 1.5; }

.section-heading { max-width: 620px; }
.section-heading h2, .feature-copy h2, .intent-copy h2 { margin: 8px 0 0; font-size: clamp(2rem, 4.7vw, 4.1rem); line-height: 1.04; letter-spacing: -.055em; text-wrap: balance; }
.how-section, .why-section, .faq-section, .intent-section { padding: 110px 0; }
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 52px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--line); }
.step-grid article { min-height: 240px; padding: 28px; background: var(--white); }
.step-number { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-bottom: 50px; border-radius: 50%; background: var(--ink); color: var(--lime); font-size: .74rem; font-weight: 820; }
.step-grid h3, .why-grid h3 { margin-bottom: 8px; font-size: 1.2rem; letter-spacing: -.025em; }
.step-grid p, .why-grid p { margin-bottom: 0; color: var(--muted); }

.feature-band { overflow: hidden; background: var(--ink); color: var(--white); }
.feature-layout { min-height: 600px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 70px; padding-block: 70px; }
.format-orbit { position: relative; aspect-ratio: 1; display: grid; place-items: center; }
.format-orbit::before, .format-orbit::after { content: ""; position: absolute; border: 1px solid #354158; border-radius: 50%; }
.format-orbit::before { width: 72%; height: 72%; }
.format-orbit::after { width: 102%; height: 102%; opacity: .5; }
.orbit-core { position: relative; width: 170px; aspect-ratio: 1; display: grid; place-items: center; border-radius: 50%; background: var(--lime); color: var(--ink); font-weight: 850; box-shadow: 0 0 100px rgba(185,245,66,.22); }
.orbit-core span { position: absolute; }
.orbit-core span:first-child { font-size: 2rem; }
.orbit-core span:nth-child(2) { transform: translate(145px, -80px); color: var(--white); }
.orbit-core span:nth-child(3) { transform: translate(-150px, -68px); color: var(--white); }
.orbit-core span:nth-child(4) { transform: translate(135px, 112px); color: var(--white); }
.orbit-core span:nth-child(5) { transform: translate(-140px, 118px); color: var(--white); }
.feature-copy .eyebrow { color: var(--lime); }
.feature-copy p { max-width: 560px; margin: 22px 0 30px; color: #aeb9cb; font-size: 1.1rem; }
.mini-formats { display: flex; flex-wrap: wrap; gap: 8px; }
.mini-formats span { padding: 7px 11px; border: 1px solid #3a465a; border-radius: 7px; color: #c9d2df; font-size: .72rem; font-weight: 800; }

.intent-section { display: grid; grid-template-columns: 1.5fr .7fr; gap: 80px; align-items: center; }
.intent-copy p { margin: 24px 0 0; max-width: 720px; color: var(--muted); font-size: 1.08rem; }
.intent-checks { display: grid; gap: 12px; }
.intent-checks span { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); font-size: .9rem; font-weight: 650; }

.why-section { border-bottom: 1px solid var(--line); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 50px; }
.why-grid article { padding: 28px 0; border-top: 1px solid #aeb7c3; }
.feature-icon { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-bottom: 48px; border-radius: 12px; background: var(--lime); font-size: 1.2rem; font-weight: 800; }

.evidence-section { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding: 90px 0; }
.evidence-card { padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); }
.evidence-card h2 { margin: 16px 0 10px; font-size: 1.05rem; line-height: 1.55; letter-spacing: -.015em; }
.evidence-card p, .evidence-card li { color: var(--muted); font-size: .91rem; }
.evidence-card ul { margin: 17px 0 0; padding-left: 20px; }
.evidence-card a { color: #315f00; font-weight: 700; font-size: .86rem; }

.faq-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 20px; list-style: none; cursor: pointer; font-size: 1.08rem; font-weight: 720; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { font-size: 1.6rem; font-weight: 350; transition: transform .2s; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { margin: -5px 45px 24px 0; color: var(--muted); }

.seo-links { padding: 70px 0 110px; }
.seo-links h2 { margin-bottom: 20px; font-size: 1.2rem; letter-spacing: -.02em; }
.link-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
.link-cloud a { display: inline-flex; align-items: center; gap: 9px; padding: 10px 13px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); color: #3c485b; text-decoration: none; font-size: .86rem; font-weight: 670; }
.link-cloud a:hover, .link-cloud a[aria-current="page"] { border-color: var(--ink); color: var(--ink); }
.link-cloud a span { color: #8b96a6; }

.site-footer { background: var(--ink); color: var(--white); }
.footer-grid { min-height: 260px; display: grid; grid-template-columns: 1.7fr repeat(3, 1fr); gap: 55px; align-items: start; padding-block: 58px; }
.footer-grid .brand { margin-bottom: 16px; }
.footer-grid .brand-mark { background: var(--lime); color: var(--ink); }
.footer-grid p, .footer-grid span { color: #8f9caf; font-size: .83rem; }
.footer-grid nav { display: grid; gap: 9px; }
.footer-grid nav strong { margin-bottom: 4px; font-size: .78rem; text-transform: uppercase; letter-spacing: .09em; color: #c8d1de; }
.footer-grid nav a { color: #9eabba; text-decoration: none; font-size: .86rem; }
.footer-grid nav a:hover { color: var(--white); }
.footer-inner { min-height: 170px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 35px; }
.footer-brand .brand-mark { background: var(--lime); color: var(--ink); }
.footer-inner p { margin: 0; color: #8f9caf; font-size: .86rem; }
.copyright { text-align: right; }
.not-found { min-height: 70vh; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; max-width: 760px; }
.not-found h1 { font-size: clamp(3rem, 8vw, 6rem); }
.not-found p { color: var(--muted); font-size: 1.1rem; }
.inline-button { min-height: 52px; padding: 0 24px; }

.content-page { padding: 48px 0 120px; }
.content-page > header { max-width: 850px; padding: 45px 0 65px; }
.content-page > header p { max-width: 760px; color: var(--muted); font-size: 1.18rem; }
.article-sections { max-width: 850px; display: grid; gap: 1px; border: 1px solid var(--line); border-radius: 20px; overflow: hidden; background: var(--line); }
.article-sections section { padding: 32px; background: var(--white); }
.article-sections h2 { margin-bottom: 8px; font-size: 1.45rem; letter-spacing: -.03em; }
.article-sections p { margin: 0; color: var(--muted); }
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.guide-card { min-height: 280px; display: flex; flex-direction: column; padding: 30px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); text-decoration: none; transition: transform .18s, border-color .18s; }
.guide-card:hover { transform: translateY(-3px); border-color: #9aa5b5; }
.guide-card > span { color: var(--lime-deep); font-size: .72rem; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.guide-card h2 { margin: 16px 0 10px; font-size: 1.55rem; line-height: 1.15; letter-spacing: -.035em; }
.guide-card p { color: var(--muted); }
.guide-card b { margin-top: auto; font-size: .88rem; }
.related-block { max-width: 850px; padding-top: 55px; }
.related-block .inline-button { margin-top: 25px; }
.contact-form { max-width: 850px; margin-top: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--white); }
.contact-form label { color: #344054; font-size: .84rem; font-weight: 750; }
.contact-form label:nth-of-type(3), .contact-form button, .contact-form p { grid-column: 1 / -1; }
.contact-form input, .contact-form textarea { width: 100%; margin-top: 5px; padding: 11px 12px; border: 1px solid #cfd6df; border-radius: 10px; color: var(--ink); background: #fbfcfe; }
.contact-form textarea { resize: vertical; }
.contact-form p { margin: 0; color: var(--muted); font-size: .8rem; }
.honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }

@media (max-width: 900px) {
    .desktop-nav { display: none; }
    .language-menu { margin-left: auto; }
    .hero { padding-top: 48px; }
    .download-grid { grid-template-columns: repeat(3, 1fr); }
    .feature-layout { grid-template-columns: 1fr; gap: 20px; }
    .format-orbit { max-width: 500px; margin: auto; }
    .feature-copy { padding-bottom: 40px; }
    .intent-section { grid-template-columns: 1fr; gap: 40px; }
    .faq-section { grid-template-columns: 1fr; gap: 45px; }
    .capability-strip { grid-template-columns: 1fr; }
    .capability-strip div { border-right: 0; border-bottom: 1px solid var(--line); }
    .capability-strip div:last-child { border-bottom: 0; }
    .evidence-section { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
    .section-shell, .nav-shell { width: min(100% - 28px, 1160px); }
    .nav-shell { height: 66px; }
    .brand-mark { width: 33px; height: 33px; }
    .hero { padding: 42px 0 64px; }
    h1 { font-size: clamp(2.55rem, 13vw, 4rem); }
    .hero-copy { margin-bottom: 25px; text-align: left; }
    .hero-copy p { font-size: 1rem; }
    .tool-card { padding: 9px; border-radius: 20px; }
    .drop-zone { min-height: 195px; padding: 18px 15px; }
    .tool-controls { grid-template-columns: 1fr; }
    .select-label, .primary-button { min-height: 58px; }
    .trust-line { padding: 0 8px; }
    .result-heading { align-items: flex-start; flex-direction: column; gap: 14px; }
    .audio-dock { padding: 12px; }
    .audio-time { grid-template-columns: 37px 1fr 37px; gap: 7px; }
    .transcript-toolbar { align-items: stretch; flex-direction: column; }
    .tabs { width: 100%; }
    .tab { flex: 1; }
    .copy-button { justify-content: center; padding: 8px; }
    .karaoke-view, .plain-view { min-height: 280px; padding: 24px 20px; }
    .karaoke-view { font-size: 1.35rem; }
    .download-grid { grid-template-columns: repeat(2, 1fr); }
    .download-card:last-child { grid-column: 1 / -1; }
    .editor-tools { align-items: stretch; flex-direction: column; }
    .how-section, .why-section, .faq-section, .intent-section { padding: 80px 0; }
    .step-grid, .why-grid { grid-template-columns: 1fr; }
    .step-grid article { min-height: 210px; }
    .step-number, .feature-icon { margin-bottom: 32px; }
    .feature-layout { min-height: auto; padding-block: 65px; }
    .orbit-core { width: 120px; }
    .orbit-core span:nth-child(2) { transform: translate(100px, -58px); }
    .orbit-core span:nth-child(3) { transform: translate(-100px, -50px); }
    .orbit-core span:nth-child(4) { transform: translate(92px, 78px); }
    .orbit-core span:nth-child(5) { transform: translate(-95px, 82px); }
    .footer-inner { padding: 36px 0; grid-template-columns: 1fr; gap: 16px; }
    .copyright { text-align: left; }
    .guide-grid, .footer-grid, .contact-form { grid-template-columns: 1fr; }
    .contact-form label:nth-of-type(3), .contact-form button, .contact-form p { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}