:root {
  --ink: #10243e;
  --ink-soft: #52647c;
  --paper: #f4f1e9;
  --paper-deep: #e8e1d3;
  --white: #fffdf8;
  --teal: #13a89e;
  --teal-light: #d9f2ee;
  --blue: #2f6ff0;
  --blue-light: #e4ecff;
  --coral: #e15b55;
  --coral-light: #fbe7e4;
  --line: rgba(16, 36, 62, .16);
  --shadow: 0 24px 70px rgba(16, 36, 62, .13);
  --radius-lg: 30px;
  --radius-md: 20px;
  --shell: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* Anchor offset contract: scroll-margin only (no scroll-padding — avoid double-counting).
   Desktop: header bottom ≈92px + small gap → 116px. Mobile: shorter fixed header + gap. */
#audio-sample,
section[id] {
  scroll-margin-top: 116px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Gothic UI", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, audio { font: inherit; }
.shell { width: var(--shell); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: fixed; z-index: 100; left: 16px; top: -80px; padding: 10px 16px; color: white; background: var(--ink); border-radius: 8px; }
.skip-link:focus { top: 12px; }

:focus-visible { outline: 3px solid #ffb800; outline-offset: 4px; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .09s; }
.reveal[data-delay="2"] { transition-delay: .18s; }

.site-header { position: fixed; z-index: 20; inset: 0 0 auto; padding-top: 24px; color: white; background: var(--ink); }
.site-header.is-scrolled { position: fixed; padding: 0; color: var(--ink); background: rgba(244, 241, 233, .94); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.header-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; font-family: Georgia, serif; font-style: italic; font-weight: 800; color: var(--ink); background: var(--teal); }
.brand-copy { display: grid; line-height: 1.1; letter-spacing: .06em; }
.brand-copy strong { font-size: .78rem; }
.brand-copy small { margin-top: 5px; font-size: .58rem; opacity: .65; }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a { font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-decoration: none; }
.site-nav a:not(.nav-cta) { opacity: .76; }
.site-nav a:hover { opacity: 1; }
.nav-cta { padding: 10px 18px; color: var(--ink); background: var(--teal); border-radius: 999px; }
.menu-button { display: none; width: 44px; height: 44px; border: 0; color: inherit; background: transparent; }
.menu-button span:not(.sr-only) { display: block; width: 24px; height: 2px; margin: 5px auto; background: currentColor; transition: transform .2s ease, opacity .2s ease; }

.hero { position: relative; min-height: 820px; overflow: hidden; color: white; background: var(--ink); }
.hero::before { content: ""; position: absolute; inset: auto -7% -27% auto; width: 660px; aspect-ratio: 1; border-radius: 50%; background: var(--teal); opacity: .13; }
.hero::after { content: ""; position: absolute; left: -80px; bottom: 80px; width: 300px; height: 1px; background: rgba(255,255,255,.18); transform: rotate(-12deg); }
.hero-orbit { position: absolute; border: 1px solid rgba(255,255,255,.1); border-radius: 50%; }
.hero-orbit-one { width: 440px; height: 440px; top: -220px; right: 16%; }
.hero-orbit-two { width: 250px; height: 250px; left: 4%; bottom: -160px; }
.hero-grid { position: relative; z-index: 2; min-height: 820px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 72px; padding-top: 112px; padding-bottom: 72px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 20px; font-size: .68rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; opacity: .7; }
.eyebrow > span { width: 30px; height: 2px; background: var(--teal); }
.eyebrow-dark { color: var(--blue); opacity: 1; }
.hero h1 { margin: 0; max-width: 650px; font-size: clamp(3.4rem, 6.4vw, 6.1rem); line-height: 1.08; letter-spacing: -.075em; }
.hero h1 > span { display: inline-block; white-space: nowrap; }
.hero h1 em { color: var(--teal); font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-style: normal; font-weight: 600; letter-spacing: -.08em; }
.hero-lead { max-width: 620px; margin: 30px 0 0; color: rgba(255,255,255,.73); font-size: 1rem; line-height: 2; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 30px; min-height: 54px; font-size: .82rem; font-weight: 800; letter-spacing: .04em; text-decoration: none; border-radius: 999px; }
.button-primary { padding: 0 24px; color: var(--ink); background: var(--teal); box-shadow: 0 12px 35px rgba(19,168,158,.25); }
.button-primary:hover { background: #33c1b6; transform: translateY(-2px); }
.button-text { color: white; border-bottom: 1px solid rgba(255,255,255,.35); border-radius: 0; }
.hero-proof { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 50px 0 0; padding: 24px 0 0; list-style: none; border-top: 1px solid rgba(255,255,255,.13); }
.hero-proof li { display: grid; gap: 2px; }
.hero-proof strong { font-family: Georgia, serif; font-size: 1.45rem; font-style: italic; color: white; }
.hero-proof span { color: rgba(255,255,255,.5); font-size: .7rem; letter-spacing: .08em; }

.hero-studio { position: relative; max-width: 480px; margin-left: auto; }
.studio-card { border-radius: var(--radius-lg); }
.studio-card-back { position: absolute; inset: -24px 30px 28px -24px; border: 1px solid rgba(255,255,255,.14); transform: rotate(-4deg); }
.studio-card-main { position: relative; padding: 28px; color: var(--ink); background: var(--white); box-shadow: var(--shadow); transform: rotate(1.5deg); }
.studio-topline { display: flex; align-items: center; gap: 8px; color: var(--ink-soft); font-family: Consolas, monospace; font-size: .65rem; letter-spacing: .08em; }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 5px rgba(225,91,85,.12); }
.mono-badge { margin-left: auto; padding: 2px 8px; color: var(--teal); border: 1px solid currentColor; border-radius: 999px; }
.waveform { height: 116px; display: flex; align-items: center; gap: 5px; margin: 28px 0; padding: 0 6px; border-block: 1px solid var(--line); }
.waveform i { flex: 1; height: var(--h); min-height: 8px; background: var(--blue); border-radius: 999px; opacity: .8; }
.waveform i:nth-child(3n) { background: var(--teal); }
.card-kicker { color: var(--coral); font-family: Consolas, monospace; font-size: .67rem; font-weight: 800; letter-spacing: .12em; }
.studio-copy h2 { margin: 8px 0; font-size: clamp(1.55rem, 3vw, 2.1rem); line-height: 1.35; letter-spacing: -.04em; }
.studio-copy p { margin: 0 0 22px; color: var(--ink-soft); font-size: .85rem; }
.studio-card audio { width: 100%; height: 42px; }
.audio-note { display: flex; justify-content: space-between; gap: 8px; margin-top: 13px; color: var(--ink-soft); font-family: Consolas, monospace; font-size: .61rem; }
.studio-stamp { position: absolute; right: -35px; bottom: -40px; width: 96px; height: 96px; display: grid; place-items: center; color: white; background: var(--coral); border: 6px solid var(--ink); border-radius: 50%; transform: rotate(-10deg); box-shadow: 0 12px 35px rgba(0,0,0,.22); }
.studio-stamp span { position: absolute; top: 19px; font-family: Consolas, monospace; font-size: .56rem; letter-spacing: .08em; }
.studio-stamp b { margin-top: 12px; font-size: 2rem; }

.disclosure { color: white; background: var(--coral); }
.disclosure-inner { min-height: 64px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 26px; }
.disclosure-label { padding: 3px 11px; color: var(--coral); background: white; border-radius: 999px; font-size: .68rem; font-weight: 900; letter-spacing: .08em; }
.disclosure p { margin: 0; font-size: .78rem; letter-spacing: .02em; }
.disclosure-id { font-family: Consolas, monospace; font-size: .68rem; opacity: .72; }

.section { padding: 120px 0; }
.section-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 60px; margin-bottom: 64px; }
.section-heading.compact { align-items: center; }
.section-heading h2, .process-intro h2, .quality-copy h2, .services-banner h2 { margin: 0; font-size: clamp(2.2rem, 4.6vw, 4.3rem); line-height: 1.25; letter-spacing: -.065em; }
.section-heading > p { max-width: 460px; margin: 0 0 8px auto; color: var(--ink-soft); }

.work-section { background: var(--white); }
.comparison-grid { display: grid; grid-template-columns: 1fr 130px 1fr; align-items: center; }
.comparison-card { min-height: 420px; padding: 34px; border-radius: var(--radius-lg); }
.comparison-before { background: var(--coral-light); }
.comparison-after { background: var(--teal-light); }
.comparison-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.comparison-head span { font-family: Consolas, monospace; font-size: .68rem; letter-spacing: .15em; }
.comparison-before .comparison-head span { color: var(--coral); }
.comparison-after .comparison-head span { color: #088e86; }
.comparison-head strong { font-size: .92rem; }
.quote-list { display: grid; gap: 14px; margin-top: 28px; }
.quote-list p { margin: 0; padding: 17px 20px; background: rgba(255,255,255,.78); border: 1px solid rgba(16,36,62,.1); border-radius: 14px; font-size: clamp(.9rem, 1.4vw, 1.03rem); }
.comparison-before .quote-list p { color: #7a4850; text-decoration: line-through; text-decoration-thickness: 1px; }
.comparison-after .quote-list strong { color: #008e85; }
.comparison-foot { margin: 22px 0 0; font-size: .74rem; font-weight: 700; }
.comparison-arrow { display: grid; place-items: center; color: var(--ink-soft); text-align: center; }
.comparison-arrow span { width: 48px; height: 48px; display: grid; place-items: center; color: white; background: var(--ink); border-radius: 50%; font-size: 1.3rem; }
.comparison-arrow small { margin-top: 10px; font-size: .64rem; writing-mode: vertical-rl; letter-spacing: .1em; }
.principles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 72px; background: var(--line); border: 1px solid var(--line); }
.principle { padding: 32px; background: var(--white); }
.principle > span { color: var(--blue); font-family: Georgia, serif; font-style: italic; font-weight: 800; }
.principle h3 { margin: 16px 0 8px; font-size: 1.1rem; }
.principle p { margin: 0; color: var(--ink-soft); font-size: .82rem; }

.gallery-section { background: var(--paper); }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.gallery-card { position: relative; overflow: hidden; padding: 0; color: var(--ink); text-align: left; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-md); cursor: zoom-in; box-shadow: 0 10px 30px rgba(16,36,62,.06); }
.gallery-card img { width: 100%; height: auto; aspect-ratio: 4/3; object-fit: cover; transition: transform .45s ease; }
.gallery-card:hover img { transform: scale(1.025); }
.gallery-number { position: absolute; z-index: 2; top: 14px; left: 14px; width: 38px; height: 38px; display: grid; place-items: center; color: white; background: var(--ink); border-radius: 50%; font-family: Consolas, monospace; font-size: .68rem; }
.gallery-caption { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 20px; border-top: 1px solid var(--line); }
.gallery-caption strong { font-size: .92rem; }
.gallery-caption small { color: var(--ink-soft); font-size: .68rem; }

.process-section { color: white; background: var(--ink); }
.process-section .shell { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; }
.process-intro { position: sticky; top: 130px; align-self: start; }
.process-intro > p:last-child { max-width: 440px; margin-top: 28px; color: rgba(255,255,255,.66); }
.process-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.15); }
.process-list li { display: grid; grid-template-columns: 72px 1fr; gap: 24px; padding: 34px 8px; border-bottom: 1px solid rgba(255,255,255,.15); }
.process-list > li > span { width: 48px; height: 48px; display: grid; place-items: center; color: var(--ink); background: var(--teal); border-radius: 50%; font-family: Georgia, serif; font-style: italic; font-weight: 800; }
.process-list small { color: var(--teal); font-family: Consolas, monospace; font-size: .64rem; letter-spacing: .14em; }
.process-list h3 { margin: 4px 0 6px; font-size: 1.25rem; }
.process-list p { margin: 0; color: rgba(255,255,255,.58); font-size: .82rem; }

.samples-section { background: var(--white); }
.deliverable-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.deliverable-card { display: grid; grid-template-columns: 58px 1fr auto; align-items: center; gap: 20px; min-height: 138px; padding: 24px; text-decoration: none; background: var(--paper); border: 1px solid transparent; border-radius: var(--radius-md); transition: border-color .2s ease, transform .2s ease, background .2s ease; }
.deliverable-card:hover { transform: translateY(-3px); background: white; border-color: var(--blue); }
.file-type { width: 54px; height: 64px; display: grid; place-items: center; color: white; background: var(--blue); border-radius: 8px 8px 16px 8px; font-family: Consolas, monospace; font-size: .68rem; font-weight: 900; }
.deliverable-card small { color: var(--blue); font-family: Consolas, monospace; font-size: .61rem; letter-spacing: .12em; }
.deliverable-card h3 { margin: 3px 0 2px; font-size: 1rem; }
.deliverable-card p { margin: 0; color: var(--ink-soft); font-size: .72rem; }
.download-icon { width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; }

.quality-section { color: white; background: #153452; }
.quality-grid { display: grid; grid-template-columns: .82fr 1.18fr; align-items: center; gap: 80px; }
.quality-copy > p:last-of-type { max-width: 470px; margin-top: 28px; color: rgba(255,255,255,.66); }
.quality-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.quality-meta span { padding: 6px 11px; color: var(--teal); border: 1px solid rgba(19,168,158,.45); border-radius: 999px; font-family: Consolas, monospace; font-size: .6rem; }
.tool-scope { margin: 30px 0 0; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.14); }
.tool-scope div { display: grid; grid-template-columns: 88px 1fr; gap: 12px; padding: 5px 0; font-size: .7rem; }
.tool-scope dt { color: var(--teal); font-family: Consolas, monospace; font-weight: 800; }
.tool-scope dd { margin: 0; color: rgba(255,255,255,.62); }
.check-panel { position: relative; padding: 34px; color: var(--ink); background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.check-panel-head { display: flex; justify-content: space-between; padding-bottom: 22px; border-bottom: 1px solid var(--line); font-family: Consolas, monospace; font-size: .7rem; letter-spacing: .1em; }
.check-panel-head strong { color: var(--teal); }
.check-panel ul { margin: 0; padding: 14px 0 0; list-style: none; }
.check-panel li { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.check-panel li i { width: 28px; height: 28px; display: grid; place-items: center; color: white; background: var(--teal); border-radius: 50%; font-style: normal; font-weight: 900; }
.check-panel li span { display: grid; line-height: 1.45; }
.check-panel li strong { font-size: .86rem; }
.check-panel li small { color: var(--ink-soft); font-size: .69rem; }
.verified-stamp { position: absolute; right: -28px; bottom: -26px; width: 116px; height: 76px; display: grid; place-items: center; align-content: center; color: var(--coral); background: var(--white); border: 3px double var(--coral); border-radius: 50%; transform: rotate(-8deg); }
.verified-stamp b { font-family: Consolas, monospace; font-size: .8rem; letter-spacing: .08em; }
.verified-stamp span { font-size: .5rem; }

.services-section { padding-bottom: 130px; background: var(--paper); }
.services-banner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px 90px; padding: 64px; background: var(--teal-light); border-radius: var(--radius-lg); }
.services-banner h2 { font-size: clamp(2rem, 4vw, 3.6rem); }
.services-banner ul { margin: 0; padding: 0; list-style: none; }
.services-banner li { display: grid; grid-template-columns: 42px 1fr; gap: 12px; padding: 15px 0; border-bottom: 1px solid rgba(16,36,62,.14); font-size: .9rem; font-weight: 800; }
.services-banner li span { color: #008e85; font-family: Georgia, serif; font-style: italic; }
.services-note { grid-column: 1 / -1; display: grid; grid-template-columns: 170px 1fr; gap: 24px; padding-top: 30px; border-top: 1px solid rgba(16,36,62,.18); }
.services-note strong { font-size: .9rem; }
.services-note p { max-width: 660px; margin: 0; color: var(--ink-soft); font-size: .82rem; }

.site-footer { padding: 54px 0; color: white; background: #09182b; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr auto; align-items: end; gap: 40px; }
.footer-grid strong { font-size: .78rem; letter-spacing: .12em; }
.footer-grid p { margin: 6px 0 0; color: rgba(255,255,255,.54); font-size: .68rem; }
.copyright { text-align: right; }

.image-dialog { width: min(1100px, calc(100% - 32px)); max-width: none; padding: 12px; background: var(--white); border: 0; border-radius: 18px; box-shadow: var(--shadow); }
.image-dialog::backdrop { background: rgba(5,16,31,.86); backdrop-filter: blur(5px); }
.image-dialog img { width: 100%; height: auto; border-radius: 10px; }
.dialog-close { position: absolute; z-index: 2; top: 22px; right: 22px; width: 42px; height: 42px; color: white; background: var(--ink); border: 0; border-radius: 50%; font-size: 1.5rem; cursor: pointer; }

@media (max-width: 980px) {
  .hero { min-height: auto; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr; gap: 70px; padding-top: 160px; padding-bottom: 100px; }
  .hero-studio { width: min(520px, 94%); margin: 0 auto; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; }
  .section-heading > p { margin-left: 0; }
  .comparison-grid { grid-template-columns: 1fr; gap: 18px; }
  .comparison-arrow { grid-template-columns: auto 1fr; justify-content: center; gap: 12px; }
  .comparison-arrow span { transform: rotate(90deg); }
  .comparison-arrow small { margin: 0; writing-mode: horizontal-tb; }
  .process-section .shell, .quality-grid { grid-template-columns: 1fr; gap: 60px; }
  .process-intro { position: static; }
  .services-banner { grid-template-columns: 1fr; }
  .services-note { grid-column: auto; }
}

@media (max-width: 760px) {
  :root { --shell: min(100% - 28px, 1180px); --radius-lg: 24px; }
  #audio-sample,
  section[id] {
    scroll-margin-top: 96px;
  }
  .site-header { padding-top: 10px; }
  .site-header.is-scrolled { padding: 0; }
  .menu-button { display: block; z-index: 3; }
  .menu-button[aria-expanded="true"] span:nth-of-type(2) { transform: translateY(7px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-of-type(3) { opacity: 0; }
  .menu-button[aria-expanded="true"] span:nth-of-type(4) { transform: translateY(-7px) rotate(-45deg); }
  body.menu-open .site-header {
    color: white; background: transparent; border-bottom-color: transparent;
    backdrop-filter: none; -webkit-backdrop-filter: none;
  }
  .site-nav {
    position: fixed; inset: 0; z-index: 2; display: none; flex-direction: column; align-items: center; justify-content: flex-start; gap: 20px;
    padding: calc(72px + env(safe-area-inset-top, 0px)) max(24px, env(safe-area-inset-right, 0px)) max(24px, env(safe-area-inset-bottom, 0px)) max(24px, env(safe-area-inset-left, 0px));
    overflow-y: auto; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; min-height: 100dvh; min-height: 100svh;
    color: white; background: rgba(9,24,43,.97);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { font-size: 1.2rem; }
  .nav-cta { margin-top: 16px; color: var(--ink); }
  .hero-grid { padding-top: 130px; padding-bottom: 80px; }
  .hero h1 { font-size: clamp(2.5rem, 12vw, 3.8rem); }
  .hero-lead { font-size: .9rem; }
  .hero-proof { grid-template-columns: repeat(2, 1fr); row-gap: 18px; }
  .studio-card-main { padding: 22px; }
  .studio-card-back { inset: -14px 18px 20px -12px; }
  .studio-stamp { right: -20px; bottom: -48px; }
  .waveform { height: 90px; }
  .audio-note { display: grid; }
  .disclosure-inner { grid-template-columns: auto 1fr; gap: 12px; padding: 14px 0; }
  .disclosure-id { display: none; }
  .disclosure p { font-size: .68rem; line-height: 1.55; }
  .section { padding: 86px 0; }
  .section-heading { margin-bottom: 42px; }
  .section-heading h2, .process-intro h2, .quality-copy h2 { font-size: clamp(2.15rem, 10vw, 3.3rem); }
  .comparison-card { min-height: auto; padding: 24px; }
  .principles-grid, .gallery-grid, .deliverable-grid { grid-template-columns: 1fr; }
  .principles-grid { gap: 1px; }
  .process-list li { grid-template-columns: 54px 1fr; gap: 14px; padding: 28px 0; }
  .process-list > li > span { width: 42px; height: 42px; }
  .check-panel { padding: 24px; }
  .verified-stamp { right: -8px; bottom: -48px; }
  .services-banner { gap: 42px; padding: 36px 24px; }
  .services-note { grid-template-columns: 1fr; gap: 8px; }
  .footer-grid { grid-template-columns: 1fr; align-items: start; gap: 22px; }
  .copyright { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}