/* ---------------------------------------------------------------
   Sanka — 三華開発合同会社
   Warm paper, burnt-orange brand, editorial rhythm.
--------------------------------------------------------------- */

:root {
  --paper:       #F5F2E9;
  --paper-alt:   #EDE8DC;
  --paper-deep:  #E4DDCC;
  --ink:         #241F1B;
  --ink-soft:    #5C5349;
  --ink-faint:   #877C6F;
  --brand:       #A94D18;
  --brand-lit:   #C45A17; /* exact fill of the supplied logo artwork */
  --brand-deep:  #7A3610;
  --rule:        rgba(36, 31, 27, 0.14);
  --rule-soft:   rgba(36, 31, 27, 0.08);

  --wrap: 1240px;
  --gut: clamp(1.25rem, 4vw, 3.5rem);
  --sec-y: clamp(4.5rem, 9vw, 9rem);

  --serif: 'Cormorant Garamond', 'Shippori Mincho', Georgia, 'Times New Roman', serif;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  --jp-serif: 'Shippori Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', 'Noto Serif JP', serif;
  --jp-sans: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif;

  --display: var(--serif);
  --body: var(--sans);
  --lh-body: 1.68;
  --track-title: -0.015em;
}

body.lang-ja {
  --display: var(--jp-serif);
  --body: var(--jp-sans);
  --lh-body: 1.9;
  --track-title: 0.01em;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.075rem);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-underline-offset: 0.18em; }
a:hover { color: var(--brand-deep); }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--ink); color: var(--paper);
  padding: 0.75rem 1.25rem; text-decoration: none;
}
.skip:focus { left: 0; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
}

/* ---------------------------------------------------------- header */

.site-head {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.site-head.is-stuck { border-bottom-color: var(--rule); }

.head-inner {
  display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.5rem);
  min-height: 74px;
}

.brand {
  display: inline-flex; align-items: center; gap: 0.7rem;
  text-decoration: none; color: var(--ink); flex: 0 0 auto;
}
.mark-img { width: 46px; height: auto; flex: 0 0 auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--display); font-size: 1.32rem; font-weight: 600;
  letter-spacing: 0.06em;
}
.brand-sub {
  font-size: 0.63rem; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--ink-faint);
}
body.lang-ja .brand-sub { text-transform: none; letter-spacing: 0.08em; font-size: 0.66rem; }

.nav { flex: 1 1 auto; display: flex; justify-content: center; }
.nav-list {
  display: flex; gap: clamp(0.9rem, 2vw, 1.9rem);
  list-style: none; margin: 0; padding: 0;
}
.nav-list a {
  color: var(--ink-soft); text-decoration: none;
  font-size: 0.86rem; letter-spacing: 0.02em; white-space: nowrap;
  padding-block: 0.4rem; border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.nav-list a:hover, .nav-list a.is-active { color: var(--ink); border-bottom-color: var(--brand); }

.head-side { display: flex; align-items: center; gap: 0.85rem; flex: 0 0 auto; }
.lang-switch {
  font-size: 0.82rem; color: var(--ink-soft); text-decoration: none;
  letter-spacing: 0.04em; border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
}
.lang-switch:hover { color: var(--brand); border-bottom-color: var(--brand); }

.btn {
  display: inline-block; background: var(--brand); color: #fff;
  text-decoration: none; font-family: var(--body); font-weight: 500;
  font-size: 0.92rem; letter-spacing: 0.02em;
  padding: 0.82rem 1.5rem; border-radius: 2px;
  transition: background .18s ease, transform .18s ease;
}
.btn:hover { background: var(--brand-deep); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 0.55rem 1.05rem; font-size: 0.82rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-ghost {
  background: transparent; color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.55);
}
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }

.burger {
  display: none; width: 40px; height: 34px; padding: 7px 6px;
  background: none; border: 0; cursor: pointer;
  flex-direction: column; justify-content: space-between;
}
.burger span { display: block; height: 1.5px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

.mobile-nav { border-top: 1px solid var(--rule); background: var(--paper); }
.mobile-nav ul { list-style: none; margin: 0; padding: 0.5rem var(--gut) 1.25rem; }
.mobile-nav li + li { border-top: 1px solid var(--rule-soft); }
.mobile-nav a {
  display: block; padding: 0.85rem 0; color: var(--ink);
  text-decoration: none; font-size: 1rem;
}

@media (max-width: 1040px) {
  .nav { display: none; }
  .burger { display: flex; }
  .head-side .btn-sm { display: none; }
}

/* ------------------------------------------------------------ hero */

.hero { position: relative; isolation: isolate; color: #fff; }
.hero-media { position: absolute; inset: 0; z-index: -1; overflow: hidden; }
.hero-img { width: 100%; height: 100%; object-fit: cover; }
.hero-scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(to top, rgba(20,15,11,.86) 0%, rgba(20,15,11,.52) 42%, rgba(20,15,11,.18) 72%, rgba(20,15,11,.30) 100%);
}
.hero-inner {
  display: flex; flex-direction: column; align-items: flex-start;
  min-height: min(94svh, 900px);
  padding-top: clamp(5rem, 14vh, 9rem);
  padding-bottom: clamp(2.5rem, 6vh, 4rem);
  justify-content: flex-end;
}
.hero-eyebrow {
  margin: 0 0 1.25rem; font-size: 0.76rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: rgba(255,255,255,.82);
}
body.lang-ja .hero-eyebrow { text-transform: none; letter-spacing: 0.14em; font-size: 0.8rem; }
.hero-title {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(2.5rem, 6.2vw, 5.1rem);
  line-height: 1.06; letter-spacing: var(--track-title);
  margin: 0 0 1.4rem; max-width: 17ch;
  text-wrap: balance;
}
body.lang-ja .hero-title { line-height: 1.32; font-size: clamp(2rem, 5vw, 4rem); max-width: 15em; }
.hero-lead {
  margin: 0 0 2.2rem; max-width: 60ch;
  font-size: clamp(1.02rem, 0.98rem + 0.35vw, 1.2rem);
  color: rgba(255,255,255,.9);
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-bottom: clamp(2.5rem, 6vw, 4rem); }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: clamp(1.5rem, 5vw, 4rem);
  margin: 0; padding-top: 1.75rem;
  border-top: 1px solid rgba(255,255,255,.24);
  width: 100%;
}
.hero-stats div { display: flex; flex-direction: column-reverse; gap: 0.15rem; }
.hero-stats dt {
  font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: rgba(255,255,255,.7);
}
body.lang-ja .hero-stats dt { text-transform: none; letter-spacing: 0.1em; font-size: 0.76rem; }
.hero-stats dd {
  margin: 0; font-family: var(--display); font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 500; line-height: 1.1;
}

/* --------------------------------------------------------- sections */

/* Keep anchored sections clear of the sticky header. */
.section, #top { scroll-margin-top: 92px; }
@media (max-width: 1040px) { .section, #top { scroll-margin-top: 78px; } }

.section { padding-block: var(--sec-y); }
.section.alt { background: var(--paper-alt); }

.kicker {
  margin: 0 0 1rem; font-size: 0.74rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--brand);
  font-weight: 500;
}
body.lang-ja .kicker { text-transform: none; letter-spacing: 0.14em; font-size: 0.8rem; }
.kicker.light { color: #E8A97C; }

.s-head { max-width: 62ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.s-title {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(1.95rem, 3.9vw, 3.15rem);
  line-height: 1.14; letter-spacing: var(--track-title);
  margin: 0 0 1.1rem; text-wrap: balance;
}
body.lang-ja .s-title { line-height: 1.42; font-size: clamp(1.6rem, 3.2vw, 2.5rem); }
.s-title.light { color: #fff; }
.s-lead { margin: 0; color: var(--ink-soft); font-size: 1.06rem; max-width: 58ch; }
.s-lead.light { color: rgba(255,255,255,.86); }

.body { margin: 0 0 1.15rem; color: var(--ink-soft); }
.body:last-of-type { margin-bottom: 0; }
.measure { max-width: 66ch; }
body.lang-ja .measure { max-width: 42em; }

.note {
  margin: 1.75rem 0 0; padding-left: 1.1rem;
  border-left: 2px solid var(--brand);
  color: var(--ink-soft); font-size: 0.95rem;
  max-width: 62ch;
}
.wide-note { margin-top: clamp(2rem, 4vw, 3rem); max-width: 74ch; }

.pull {
  margin: clamp(2.5rem, 5vw, 3.75rem) 0 0;
  padding: 0; border: 0;
  border-top: 1px solid var(--rule); padding-top: clamp(1.75rem, 3vw, 2.5rem);
}
.pull p {
  margin: 0; font-family: var(--display);
  font-size: clamp(1.35rem, 2.6vw, 2.05rem);
  line-height: 1.32; letter-spacing: var(--track-title);
  max-width: 34ch; text-wrap: balance;
}
body.lang-ja .pull p { line-height: 1.62; font-size: clamp(1.15rem, 2.1vw, 1.65rem); max-width: 21em; }

/* ----------------------------------------------------------- intro */

.big-statement {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(2.05rem, 4.6vw, 3.7rem);
  line-height: 1.12; letter-spacing: var(--track-title);
  margin: 0 0 clamp(2rem, 4vw, 3rem); max-width: 22ch;
  text-wrap: balance;
}
body.lang-ja .big-statement { line-height: 1.4; font-size: clamp(1.7rem, 3.6vw, 2.8rem); max-width: 17em; }

/* ------------------------------------------------------- two-column */

.grid-2 {
  display: grid; gap: clamp(2.5rem, 5vw, 4.5rem);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 900px) {
  .grid-2 { grid-template-columns: 1fr 1fr; gap: clamp(3rem, 6vw, 6rem); }
  .grid-2.reverse .col:first-child { order: 2; }
}
.fig { margin: 0; }
.fig img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 2px; }
@media (min-width: 900px) {
  .sticky-fig { position: sticky; top: 110px; }
}


/* ----------------------------------------------------------- cards */

.cards-3 { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); grid-template-columns: 1fr; }
@media (min-width: 760px) { .cards-3 { grid-template-columns: repeat(3, 1fr); } }
.card-fig { margin: 0 0 1.35rem; overflow: hidden; border-radius: 2px; }
.card-fig img {
  width: 100%; aspect-ratio: 3 / 4; object-fit: cover;
  transition: transform .6s cubic-bezier(.2,.6,.2,1);
}
.card:hover .card-fig img { transform: scale(1.035); }
.card-title {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.25rem, 1.9vw, 1.5rem);
  margin: 0 0 0.6rem; letter-spacing: 0.01em;
}
.card-body { margin: 0; color: var(--ink-soft); font-size: 0.96rem; }

/* ----------------------------------------------------------- terms */

.terms-list { border-top: 1px solid var(--rule); }
.term {
  display: grid; grid-template-columns: 1fr; gap: 0.5rem;
  padding: clamp(1.4rem, 2.6vw, 2rem) 0;
  border-bottom: 1px solid var(--rule-soft);
}
@media (min-width: 860px) {
  .term { grid-template-columns: minmax(18rem, 38%) 1fr; gap: clamp(2rem, 5vw, 4rem); }
}
.term-title {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.18rem, 1.7vw, 1.42rem);
  margin: 0; line-height: 1.3;
}
.term-body { margin: 0; color: var(--ink-soft); font-size: 0.97rem; }

/* ------------------------------------------------------------ name */

.mark-sm { width: 34px; height: auto; flex: 0 0 auto; }

/* --------------------------------------------------------- contact */

.contact { position: relative; isolation: isolate; color: #fff; }
.contact-media { position: absolute; inset: 0; z-index: -1; overflow: hidden; }
.contact-img { width: 100%; height: 100%; object-fit: cover; }
.contact-scrim { position: absolute; inset: 0; background: rgba(22, 16, 12, .8); }
.contact-inner { max-width: 68ch; }
.contact-cta { margin: clamp(2rem, 4vw, 2.75rem) 0 0; }

.contact-details {
  margin: clamp(2.5rem, 5vw, 3.5rem) 0 0;
  border-top: 1px solid rgba(255,255,255,.22);
  max-width: 60rem;
}
.contact-details div {
  display: grid; grid-template-columns: 1fr; gap: 0.2rem;
  padding: 0.95rem 0; border-bottom: 1px solid rgba(255,255,255,.12);
}
@media (min-width: 640px) {
  .contact-details div { grid-template-columns: minmax(9rem, 28%) 1fr; gap: 1.5rem; }
}
.contact-details dt {
  font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: rgba(255,255,255,.62);
}
body.lang-ja .contact-details dt { text-transform: none; letter-spacing: 0.09em; font-size: 0.84rem; }
.contact-details dd { margin: 0; color: rgba(255,255,255,.94); }
.contact-details a { color: #F0B489; }
.contact-details a:hover { color: #fff; }

/* ---------------------------------------------------------- footer */

.site-foot {
  background: var(--paper-deep);
  padding-block: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--rule);
}
.foot-inner {
  display: grid; gap: clamp(1.75rem, 4vw, 3rem);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 800px) { .foot-inner { grid-template-columns: 1fr auto; } }
.foot-brand { display: flex; gap: 0.9rem; align-items: flex-start; }
.foot-name { margin: 0 0 0.2rem; font-family: var(--display); font-size: 1.08rem; font-weight: 600; }
.foot-tag { margin: 0; font-size: 0.88rem; color: var(--ink-soft); max-width: 34ch; }
.foot-meta { font-size: 0.83rem; color: var(--ink-soft); }
@media (min-width: 800px) { .foot-meta { text-align: right; } }
.foot-meta p { margin: 0 0 0.45rem; }
.foot-meta p:last-child { margin-bottom: 0; }
.credits { max-width: 46ch; }
@media (min-width: 800px) { .credits { margin-left: auto; } }
.rights { color: var(--ink-faint); }

/* --------------------------------------------------------- problem */

.lead-in {
  margin: clamp(3rem, 6vw, 4.5rem) 0 clamp(1.75rem, 3vw, 2.5rem);
  font-family: var(--display);
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  line-height: 1.36; letter-spacing: var(--track-title);
  max-width: 46ch; text-wrap: balance;
}
body.lang-ja .lead-in { line-height: 1.7; font-size: clamp(1.1rem, 1.8vw, 1.4rem); max-width: 26em; }

.paths { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); grid-template-columns: 1fr; align-items: start; }
@media (min-width: 800px) { .paths { grid-template-columns: 1fr 1fr; } }
.path {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--paper-alt);
  border-left: 2px solid var(--brand);
  border-radius: 2px;
}
.section.alt .path { background: var(--paper); }
.path-title {
  margin: 0 0 0.7rem; font-family: var(--display); font-weight: 600;
  font-size: clamp(1.2rem, 1.8vw, 1.45rem);
}
.path-body { margin: 0; color: var(--ink-soft); font-size: 0.96rem; }

.resolution {
  margin: clamp(2.5rem, 5vw, 3.5rem) 0 0;
  padding-top: clamp(1.75rem, 3vw, 2.5rem);
  border-top: 1px solid var(--rule);
  max-width: 68ch; color: var(--ink);
  font-size: clamp(1.02rem, 1vw + 0.7rem, 1.14rem);
}

/* --------------------------------------------------------- clients */

.cards-4 { display: grid; gap: 0; grid-template-columns: 1fr; border-top: 1px solid var(--rule); }
@media (min-width: 720px) { .cards-4 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1100px) { .cards-4 { grid-template-columns: repeat(4, 1fr); } }
.client {
  padding: clamp(1.75rem, 3vw, 2.5rem) 0;
  border-bottom: 1px solid var(--rule-soft);
}
@media (min-width: 720px) {
  .client { padding-inline: clamp(1.25rem, 2.5vw, 2rem); border-right: 1px solid var(--rule-soft); }
  .client:nth-child(2n) { border-right: 0; }
  .client:nth-child(2n+1) { padding-left: 0; }
}
@media (min-width: 1100px) {
  .client:nth-child(n) { border-right: 1px solid var(--rule-soft); padding-left: clamp(1.25rem, 2.5vw, 2rem); }
  .client:last-child { border-right: 0; }
  .client:first-child { padding-left: 0; }
}
.client-n {
  margin: 0 0 0.85rem; font-family: var(--display);
  font-size: 0.92rem; letter-spacing: 0.16em; color: var(--brand);
}
.client-title {
  margin: 0 0 0.65rem; font-family: var(--display); font-weight: 600;
  font-size: clamp(1.14rem, 1.6vw, 1.32rem); line-height: 1.28;
}
.client-body { margin: 0; font-size: 0.93rem; color: var(--ink-soft); }

/* ------------------------------------------------------- practices */

.lead-big {
  font-size: clamp(1.08rem, 1vw + 0.8rem, 1.28rem);
  color: var(--ink-soft);
}

/* ------------------------------------------------------ consulting */

.qa {
  display: grid; gap: clamp(1.75rem, 3.5vw, 3rem);
  grid-template-columns: 1fr;
  margin-top: clamp(2rem, 4vw, 3rem);
}
@media (min-width: 860px) { .qa { grid-template-columns: 1fr 1fr; } }
.q-title {
  margin: 0 0 0.75rem; font-family: var(--display); font-weight: 500;
  font-size: clamp(1.3rem, 2.1vw, 1.7rem); line-height: 1.26;
  letter-spacing: var(--track-title); color: var(--brand-deep);
}
body.lang-ja .q-title { line-height: 1.5; font-size: clamp(1.15rem, 1.8vw, 1.42rem); }
.q-body { margin: 0; color: var(--ink-soft); font-size: 0.96rem; }

.panel {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding: clamp(1.75rem, 3.5vw, 3rem);
  background: var(--paper-alt);
  border-radius: 2px;
}
.section.alt .panel { background: var(--paper); }
.panel-title {
  margin: 0 0 0.9rem; font-family: var(--display); font-weight: 600;
  font-size: clamp(1.22rem, 1.9vw, 1.5rem); line-height: 1.3;
}
.panel-body { margin: 0 0 1.25rem; color: var(--ink-soft); max-width: 68ch; }
.panel-note {
  margin: 0; padding-left: 1.1rem; border-left: 2px solid var(--brand);
  font-family: var(--display); font-size: clamp(1.1rem, 1.7vw, 1.35rem);
  line-height: 1.4; max-width: 46ch;
}
body.lang-ja .panel-note { line-height: 1.7; font-size: clamp(1rem, 1.4vw, 1.16rem); max-width: 27em; }

/* ------------------------------------------------------ operations */

.ops {
  display: grid; gap: 0; grid-template-columns: 1fr;
  border-top: 1px solid var(--rule);
}
@media (min-width: 860px) { .ops { grid-template-columns: 1fr 1fr; } }
.op {
  padding: clamp(1.75rem, 3vw, 2.5rem) 0;
  border-bottom: 1px solid var(--rule-soft);
}
@media (min-width: 860px) {
  .op { padding-inline: clamp(1.5rem, 3vw, 2.5rem); border-right: 1px solid var(--rule-soft); }
  .op:nth-child(2n) { border-right: 0; }
  .op:nth-child(2n+1) { padding-left: 0; }
}
.op-verb {
  margin: 0 0 0.7rem; font-family: var(--display); font-weight: 500;
  font-size: clamp(1.4rem, 2.3vw, 1.85rem); line-height: 1.2;
  letter-spacing: var(--track-title); color: var(--brand-deep);
}
body.lang-ja .op-verb { line-height: 1.4; font-size: clamp(1.2rem, 1.9vw, 1.5rem); }
.op-body { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

.strip-3 {
  display: grid; gap: clamp(0.75rem, 1.5vw, 1.25rem);
  grid-template-columns: 1fr; margin-top: clamp(2.5rem, 5vw, 3.5rem);
}
@media (min-width: 760px) { .strip-3 { grid-template-columns: repeat(3, 1fr); } }
.strip-3 img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 2px; }

.band-2 {
  display: grid; gap: clamp(0.75rem, 1.5vw, 1.25rem);
  grid-template-columns: 1fr; margin-top: clamp(1.75rem, 3vw, 2.5rem);
}
@media (min-width: 760px) { .band-2 { grid-template-columns: 1fr 1fr; } }
.band-2 img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 2px; }

.statement {
  margin: clamp(2.5rem, 5vw, 3.5rem) auto 0;
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  line-height: 1.34; letter-spacing: var(--track-title);
  max-width: 42ch; text-align: center; text-wrap: balance;
}
body.lang-ja .statement { line-height: 1.68; font-size: clamp(1.12rem, 2vw, 1.55rem); max-width: 24em; }

/* ------------------------------------------------------ principles */

.principles-grid { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); grid-template-columns: 1fr; }
@media (min-width: 720px) { .principles-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1080px) { .principles-grid { grid-template-columns: repeat(3, 1fr); } }
.principle {
  padding: clamp(1.5rem, 2.8vw, 2rem);
  background: var(--paper-alt);
  border-top: 2px solid var(--brand);
  border-radius: 2px;
}
.section.alt .principle { background: var(--paper); }
.principle-title {
  margin: 0 0 0.65rem; font-family: var(--display); font-weight: 600;
  font-size: clamp(1.14rem, 1.6vw, 1.32rem); line-height: 1.28;
}
.principle-body { margin: 0; font-size: 0.93rem; color: var(--ink-soft); }

/* ------------------------------------------------------ regulation */

.layers-title {
  margin: clamp(2rem, 4vw, 2.75rem) 0 1rem;
  font-size: 0.76rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-faint); font-weight: 500;
}
body.lang-ja .layers-title { text-transform: none; letter-spacing: 0.09em; font-size: 0.86rem; }
.layers { list-style: none; margin: 0; padding: 0; counter-reset: layer; border-top: 1px solid var(--rule); }
.layers li {
  counter-increment: layer;
  display: grid; grid-template-columns: 2.5rem 1fr; gap: 0.75rem;
  padding: 0.8rem 0; border-bottom: 1px solid var(--rule-soft);
  font-size: 0.97rem;
}
.layers li::before {
  content: counter(layer, decimal-leading-zero);
  font-family: var(--display); font-size: 0.88rem;
  letter-spacing: 0.1em; color: var(--brand);
}

/* --------------------------------------------------------- fuyodai */

.sub-head {
  margin: clamp(3rem, 6vw, 4.5rem) 0 clamp(1.5rem, 3vw, 2rem);
  font-family: var(--display); font-weight: 500;
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  line-height: 1.3; letter-spacing: var(--track-title);
  max-width: 44ch;
}
body.lang-ja .sub-head { line-height: 1.6; font-size: clamp(1.14rem, 1.8vw, 1.42rem); max-width: 28em; }

.chips { display: flex; flex-wrap: wrap; gap: 0.75rem; list-style: none; margin: 0; padding: 0; }
.chips li {
  display: flex; flex-direction: column; gap: 0.15rem;
  padding: 0.75rem 1.1rem;
  background: var(--paper);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
}
.section.alt .chips li { background: var(--paper); }
.chip-when {
  font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--brand);
}
body.lang-ja .chip-when { text-transform: none; letter-spacing: 0.06em; font-size: 0.78rem; }
.chip-title { font-family: var(--display); font-size: 1.05rem; font-weight: 600; }

/* ------------------------------------------------------- animation */

.reveal { opacity: 0; transform: translateY(18px); }
.reveal.is-in { opacity: 1; transform: none; transition: opacity .7s ease, transform .7s cubic-bezier(.2,.6,.2,1); }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.is-in { opacity: 1; transform: none; }
}