:root {
  --ink: #173f3a;
  --ink-deep: #173f3a;
  --paper: #f5f4ef;
  --white: #ffffff;
  --teal: #247b72;
  --teal-pale: #dce8e5;
  --accent: #247b72;
  --orange: var(--accent);
  --orange-light: var(--accent);
  --graphite: #9aa6a3;
  --muted: #53635f;
  --line: #d4dcda;
  --content: 1220px;
  --text: 42rem;
}

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

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "YuGothic", Meiryo, sans-serif;
  font-size: 17px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, figure, blockquote, dl, dd { margin-top: 0; }
button, a { -webkit-tap-highlight-color: transparent; }

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 16px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-180%);
}

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

.content-width {
  width: min(calc(100% - 80px), var(--content));
  margin-inline: auto;
}

.section { position: relative; padding: 112px 0; overflow: hidden; }

.serif-heading {
  max-width: 900px;
  margin-bottom: 32px;
  font-size: clamp(44px, 5vw, 76px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.025em;
}

.serif-heading--light { color: var(--white); }

.lead {
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 900;
  line-height: 1.7;
}

.section-label {
  margin-bottom: 24px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .14em;
}

.section-label--light { color: #74d4c7; }

.note {
  margin-top: 24px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.reading-line {
  position: fixed;
  top: 0;
  right: 18px;
  z-index: 300;
  width: 2px;
  height: 100svh;
  background: rgba(240, 100, 43, .16);
  pointer-events: none;
}

.reading-line span {
  display: block;
  width: 100%;
  height: var(--read-progress, 0%);
  background: var(--orange);
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 200;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 82px;
  padding: 0 44px;
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.14);
  transition: min-height 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  min-height: 68px;
  background: rgba(6, 35, 33, .96);
}

.brand { justify-self: start; }
.brand img { width: 178px; }

.site-header nav {
  display: flex;
  gap: 34px;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .08em;
}

.site-header nav a {
  position: relative;
  opacity: .72;
}

.site-header nav a::after {
  position: absolute;
  right: 0;
  bottom: -10px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible { opacity: 1; }
.site-header nav a:hover::after { transform: scaleX(1); }

.header-cta {
  justify-self: end;
  display: inline-grid;
  place-items: center;
  min-height: 44px;
  padding: 0 20px;
  color: var(--ink-deep);
  background: var(--orange);
  border: 2px solid var(--orange-light);
  border-radius: 4px;
  box-shadow: inset 0 -2px 0 rgba(90,22,0,.2), 0 3px 0 #6e2c17;
  font-size: 13px;
  font-weight: 900;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 -1px 0 rgba(90,22,0,.16), 0 5px 0 #6e2c17;
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  color: var(--white);
  background-color: var(--ink);
}

.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: .34;
  background-image: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 11px,
    rgba(255,255,255,.025) 12px
  );
  pointer-events: none;
}

.hero::after {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(50% + 84px);
  width: 1px;
  content: "";
  background: rgba(255,255,255,.12);
}

.hero-index {
  position: absolute;
  right: -1vw;
  bottom: -16vw;
  color: transparent;
  font-size: clamp(480px, 62vw, 960px);
  font-weight: 900;
  line-height: .8;
  -webkit-text-stroke: 1px rgba(255,255,255,.055);
  pointer-events: none;
}

.hero-registration {
  position: absolute;
  top: 130px;
  right: 46px;
  display: grid;
  gap: 7px;
}

.hero-registration i {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--orange);
}

.hero-registration i:nth-child(2) { width: 12px; }

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(390px, .94fr);
  grid-template-rows: 1fr auto;
  gap: 44px 58px;
  align-items: center;
  width: min(calc(100% - 88px), 1360px);
  min-height: 100svh;
  margin-inline: auto;
  padding: 126px 0 42px;
}

.hero-copy { max-width: 760px; }

.audience {
  margin-bottom: 28px;
  color: #78d7cb;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .16em;
}

.hero h1 {
  margin-bottom: 32px;
  line-height: 1.05;
  letter-spacing: -.035em;
}

.hero h1 span,
.hero h1 strong,
.hero h1 em { display: block; }

.hero h1 span {
  margin-bottom: 10px;
  font-size: clamp(25px, 2.7vw, 42px);
  font-weight: 200;
  letter-spacing: -.01em;
}

.hero h1 strong {
  max-width: 750px;
  font-size: clamp(52px, 6vw, 94px);
  font-weight: 900;
}

.hero h1 em {
  margin-top: 20px;
  color: #80ded2;
  font-size: clamp(26px, 3.2vw, 48px);
  font-style: normal;
  font-weight: 200;
  letter-spacing: -.02em;
}

.hero-lead {
  max-width: 660px;
  margin-bottom: 30px;
  color: rgba(255,255,255,.78);
  font-size: clamp(16px, 1.4vw, 19px);
}

.hero-action {
  display: flex;
  align-items: center;
  gap: 22px;
}

.hero-action p {
  margin-bottom: 0;
  color: rgba(255,255,255,.58);
  font-size: 12px;
  font-weight: 900;
}

.hero-meta {
  margin: 18px 0 0;
  color: rgba(255,255,255,.58);
  font-size: 12px;
  font-weight: 900;
}

.hero-note {
  max-width: 34em;
  margin: 10px 0 0;
  color: rgba(255,255,255,.46);
  font-size: 12px;
  line-height: 1.75;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  min-width: 260px;
  min-height: 58px;
  padding: 0 22px 0 25px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: .02em;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.button b { font-size: 22px; font-weight: 400; }

.button--primary {
  color: var(--ink-deep);
  background: var(--orange);
  border: 3px solid var(--orange-light);
  box-shadow: inset 0 -2px 0 rgba(90,22,0,.23), 0 5px 0 #6e2c17, 0 10px 18px rgba(0,0,0,.16);
}

.button--primary:hover {
  background: #fa7138;
  transform: translateY(-2px);
  box-shadow: inset 0 -1px 0 rgba(90,22,0,.16), 0 7px 0 #6e2c17, 0 13px 22px rgba(0,0,0,.18);
}

.button--secondary {
  color: #fff;
  background: rgba(255,255,255,.06);
  border: 2px solid rgba(255,255,255,.42);
}

.button--secondary:hover {
  background: rgba(255,255,255,.13);
  border-color: rgba(255,255,255,.72);
  transform: translateY(-2px);
}

.hero-object {
  position: relative;
  align-self: stretch;
  min-height: 590px;
}

.archive-sheet {
  position: absolute;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid rgba(255,255,255,.5);
  box-shadow: 16px 20px 0 rgba(0,0,0,.16);
}

.archive-sheet span {
  display: block;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--graphite);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .13em;
}

.archive-sheet i {
  display: block;
  height: 1px;
  margin-top: 19px;
  background: var(--line);
}

.archive-sheet--back {
  top: 15%;
  right: 8%;
  width: 68%;
  min-height: 390px;
  padding: 28px;
  transform: rotate(6deg);
}

.archive-sheet--front {
  top: 23%;
  right: 16%;
  width: 64%;
  min-height: 360px;
  padding: 28px;
  transform: rotate(-3deg);
}

.archive-sheet--front strong {
  display: block;
  margin-top: 72px;
  color: var(--teal);
  font-size: 105px;
  line-height: .8;
}

.archive-sheet--front small { font-size: 10px; font-weight: 900; letter-spacing: .16em; }

.hero-phone {
  position: absolute;
  z-index: 3;
  top: 7%;
  right: 30%;
  width: min(290px, 54%);
  margin: 0;
  transform: rotate(2deg);
}

.hero-phone::before {
  position: absolute;
  inset: -8px;
  z-index: -1;
  content: "";
  background: #e7ece9;
  border: 2px solid #fff;
  border-radius: 26px;
  box-shadow: 24px 34px 55px rgba(0,0,0,.42), 7px 9px 0 rgba(240,100,43,.48);
}

.hero-phone img { width: 100%; border-radius: 18px; }

.hero-phone figcaption {
  position: absolute;
  top: 18px;
  right: calc(100% + 28px);
  width: 110px;
  color: rgba(255,255,255,.66);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .1em;
  text-align: right;
}

.hero-phone figcaption::after {
  position: absolute;
  top: 12px;
  left: calc(100% + 10px);
  width: 48px;
  height: 1px;
  content: "";
  background: var(--orange);
}

.hero-scope {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  border-top: 1px solid rgba(255,255,255,.16);
}

.hero-scope div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-right: 1px solid rgba(255,255,255,.16);
}

.hero-scope div:first-child { padding-left: 0; }
.hero-scope div:last-child { border-right: 0; }
.hero-scope dt { color: rgba(255,255,255,.48); font-size: 11px; font-weight: 900; }
.hero-scope dd { margin: 0; font-size: 21px; font-weight: 900; }
.hero-scope__total dd { color: #80ded2; }

.scroll-mark {
  position: absolute;
  right: 44px;
  bottom: 40px;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,.46);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: .18em;
  writing-mode: vertical-rl;
}

.scroll-mark i { width: 1px; height: 42px; background: var(--orange); }

.belief { background: var(--paper); }

.belief-mark {
  position: absolute;
  top: -140px;
  right: 2vw;
  color: rgba(9,46,44,.055);
  font-size: clamp(360px, 44vw, 720px);
  font-weight: 900;
  line-height: 1;
}

.belief-grid {
  position: relative;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 58px;
}

.chapter { padding-top: 18px; }
.chapter span { font-size: 12px; font-weight: 900; letter-spacing: .14em; }
.chapter i { display: block; width: 100%; height: 2px; margin-top: 16px; background: var(--orange); }
.belief-copy { max-width: 890px; }
.belief-copy > p { max-width: var(--text); }

.method-line {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 22px;
  align-items: center;
  margin-top: 86px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.method-line div { min-height: 110px; }
.method-line span, .method-line strong, .method-line small { display: block; }
.method-line span { margin-bottom: 12px; color: var(--teal); font-size: 11px; font-weight: 900; }
.method-line strong { font-size: 28px; }
.method-line small { margin-top: 5px; color: var(--muted); font-size: 13px; }
.method-line b { color: var(--orange); font-size: 28px; font-weight: 400; }

.scope {
  min-height: 820px;
  color: var(--white);
  background: var(--ink-deep);
}

.scope::before,
.learning::before,
.final-cta::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: .26;
  background-image: repeating-linear-gradient(0deg, transparent 0, transparent 9px, rgba(255,255,255,.025) 10px);
  pointer-events: none;
}

.scope-number {
  position: absolute;
  right: -24px;
  bottom: -58px;
  color: transparent;
  font-size: clamp(220px, 34vw, 540px);
  font-weight: 900;
  line-height: .85;
  letter-spacing: -.065em;
  -webkit-text-stroke: 1px rgba(255,255,255,.12);
}

.scope-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(460px, 1.1fr);
  gap: 90px;
  align-items: center;
  min-height: 580px;
}

.scope-copy { max-width: 640px; }
.scope-copy .section-label { color: #74d4c7; }
.scope-copy p { color: rgba(255,255,255,.72); }

.scope-table { margin: 0; border-top: 1px solid rgba(255,255,255,.25); }
.scope-table div { display: grid; grid-template-columns: 1fr auto; align-items: baseline; padding: 23px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.scope-table dt { color: rgba(255,255,255,.56); font-size: 13px; font-weight: 900; }
.scope-table dd { margin: 0; font-size: clamp(38px, 4vw, 64px); font-weight: 900; line-height: 1; }
.scope-table dd small { margin-left: 5px; font-size: 12px; }
.scope-table div:last-child dd { color: #80ded2; }

.themes { background: var(--white); }

.themes-grid {
  display: grid;
  grid-template-columns: minmax(400px, .86fr) minmax(0, 1.14fr);
  gap: 96px;
  align-items: center;
}

.themes-media {
  position: relative;
  min-height: 780px;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.themes-media > p {
  position: absolute;
  top: 16px;
  left: 20px;
  z-index: 3;
  margin: 0;
  color: var(--teal);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .12em;
}

.themes-media figure {
  position: absolute;
  z-index: 2;
  top: 60px;
  left: 50%;
  width: min(330px, 72%);
  margin: 0;
  transform: translateX(-50%) rotate(-2deg);
}

.themes-media figure::before {
  position: absolute;
  inset: -8px;
  z-index: -1;
  content: "";
  background: #e5eae7;
  border: 2px solid var(--white);
  border-radius: 26px;
  box-shadow: 16px 24px 44px rgba(9,46,44,.18), 7px 8px 0 var(--orange);
}

.themes-media img { border-radius: 18px; }

.themes-media > span {
  position: absolute;
  right: -6px;
  bottom: -16px;
  color: var(--teal-pale);
  font-size: clamp(160px, 20vw, 300px);
  font-weight: 900;
  line-height: .8;
  letter-spacing: -.08em;
}

.themes-copy { max-width: 650px; }
.cost-lines { margin: 42px 0 0; border-top: 1px solid var(--line); }
.cost-lines div { display: grid; grid-template-columns: 130px 1fr; gap: 24px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.cost-lines dt { color: var(--teal); font-size: 12px; font-weight: 900; }
.cost-lines dd { margin: 0; font-size: 14px; font-weight: 900; }
.cost-lines div:last-child { border-bottom: 4px solid var(--ink); }
.cost-lines div:last-child dt { color: var(--orange); }

.learning {
  color: var(--white);
  background: var(--ink);
}

.learning-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, .86fr) minmax(480px, 1.14fr);
  gap: 100px;
}

.learning-heading { position: sticky; top: 120px; align-self: start; }
.learning-heading > p:last-child { max-width: 490px; color: rgba(255,255,255,.65); }

.learning-steps {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.learning-steps::before {
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 23px;
  width: 2px;
  content: "";
  background: rgba(116,212,199,.28);
}

.learning-steps li {
  position: relative;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 30px;
  min-height: 145px;
  padding-bottom: 38px;
}

.learning-steps li > span {
  z-index: 2;
  display: grid;
  place-items: center;
  align-self: start;
  width: 48px;
  height: 48px;
  color: var(--ink);
  background: #78d7cb;
  border: 4px solid var(--ink);
  font-size: 10px;
  font-weight: 900;
}

.learning-steps li:nth-child(4) > span { color: white; background: var(--orange); }
.learning-steps li strong { display: block; margin-bottom: 4px; font-size: 27px; }
.learning-steps li p { margin: 0; color: rgba(255,255,255,.58); font-size: 14px; }

.ai-caution {
  position: relative;
  z-index: 2;
  max-width: var(--content);
  margin-top: 52px;
  padding-top: 22px;
  color: rgba(255,255,255,.45);
  border-top: 1px solid rgba(255,255,255,.14);
  font-size: 11px;
}

.ai-caution b {
  color: rgba(255,255,255,.7);
  font-weight: 700;
}

.faq-list details p b {
  color: var(--ink);
  font-weight: 700;
}

.archive { background: var(--paper); }

.archive-grid {
  display: grid;
  grid-template-columns: minmax(450px, .95fr) minmax(0, 1.05fr);
  gap: 104px;
  align-items: center;
}

.archive-visual { position: relative; min-height: 670px; }

.archive-page {
  position: absolute;
  width: 68%;
  min-height: 470px;
  padding: 34px;
  background: var(--white);
  border-top: 7px solid var(--teal);
  box-shadow: 18px 22px 0 rgba(9,46,44,.09);
}

.archive-page span {
  display: block;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .14em;
}

.archive-page strong {
  display: block;
  margin: 54px 0 50px;
  color: var(--teal);
  font-size: clamp(90px, 10vw, 150px);
  line-height: .8;
  letter-spacing: -.07em;
}

.archive-page i { display: block; height: 1px; margin-top: 20px; background: var(--line); }
.archive-page--slides { top: 0; left: 0; transform: rotate(-4deg); }
.archive-page--notes { right: 0; bottom: 0; border-top-color: var(--orange); transform: rotate(4deg); }
.archive-page--notes strong { color: var(--orange); }
.archive-copy { max-width: 650px; }

.developer {
  display: grid;
  grid-template-columns: minmax(430px, .84fr) minmax(0, 1.16fr);
  padding: 0;
  background: var(--white);
}

.developer-photo {
  position: relative;
  min-height: 1020px;
  margin: 0;
  overflow: hidden;
  background: #dedbd4;
}

.developer-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 28%;
  filter: none;
}

.developer-photo::after {
  position: absolute;
  inset: 0;
  content: "";
  box-shadow: inset -1px 0 0 rgba(9,46,44,.18);
}

.developer-identity {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  padding: 26px 34px;
  color: white;
  background: rgba(6,35,33,.92);
}

.developer-role,
.developer-name { display: block; }
.developer-role { color: #78d7cb; font-size: 10px; font-weight: 900; letter-spacing: .13em; }
.developer-name { margin-top: 2px; font-size: 26px; }

.developer-credentials {
  margin: 18px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid rgba(255,255,255,.22);
  list-style: none;
}

.developer-credentials li {
  margin-top: 5px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.55;
}

.developer-credentials b { font-weight: 700; }

.developer-copy { max-width: 780px; padding: 112px 8vw 112px 7vw; }

.history {
  margin: 48px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.history li {
  display: grid;
  grid-template-columns: 135px 1fr;
  gap: 26px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.history span { color: var(--teal); font-size: 12px; font-weight: 900; }
.history p { margin: 0; font-size: 14px; font-weight: 900; }

.guidance {
  margin-top: 46px;
  padding-top: 26px;
  border-top: 5px solid var(--orange);
}

.guidance strong { font-size: clamp(24px, 3vw, 36px); }
.guidance p { margin: 10px 0 4px; font-size: 14px; }
.guidance small { color: var(--muted); font-size: 11px; }

.access { background: var(--paper); border-top: 1px solid var(--line); }

.access-grid {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(430px, 1.2fr);
  gap: 96px;
}

.access-copy { max-width: 650px; }
.access-copy dl { margin: 40px 0 0; border-top: 1px solid var(--line); }
.access-copy dl div { display: grid; grid-template-columns: 145px 1fr; gap: 24px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.access-copy dt { color: var(--teal); font-size: 12px; font-weight: 900; }
.access-copy dd { margin: 0; font-size: 14px; font-weight: 900; }

.faq { background: var(--white); border-top: 1px solid var(--line); }

.faq-grid {
  display: grid;
  grid-template-columns: minmax(300px, .7fr) minmax(500px, 1.3fr);
  gap: 96px;
}

.faq-list { border-top: 1px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line); }

.faq-list summary {
  position: relative;
  padding: 24px 52px 24px 0;
  font-size: 19px;
  font-weight: 900;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before,
.faq-list summary::after { position: absolute; top: 50%; right: 10px; width: 18px; height: 2px; content: ""; background: var(--teal); }
.faq-list summary::after { transform: rotate(90deg); transition: transform 160ms ease; }
.faq-list details[open] summary::after { transform: rotate(0); }
.faq-list details p { max-width: 680px; padding: 0 52px 22px 0; color: var(--muted); font-size: 14px; }

.final-cta {
  position: relative;
  overflow: hidden;
  padding: 130px 0 150px;
  color: var(--white);
  background: var(--ink-deep);
}

.final-index {
  position: absolute;
  right: -20px;
  bottom: -110px;
  color: transparent;
  font-size: clamp(320px, 48vw, 700px);
  font-weight: 900;
  line-height: .8;
  -webkit-text-stroke: 1px rgba(255,255,255,.08);
}

.final-inner { position: relative; z-index: 2; text-align: center; }
.final-inner > img { width: 210px; margin: 0 auto 48px; }
.final-inner h2 { margin-inline: auto; }
.final-inner > p { color: rgba(255,255,255,.55); font-size: 12px; font-weight: 900; letter-spacing: .08em; }
.final-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 24px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 30px;
  align-items: center;
  padding: 48px 44px;
  color: var(--muted);
  background: var(--paper);
  font-size: 11px;
}

.site-footer > img { width: 170px; }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; gap: 22px; }
.site-footer nav a { text-decoration: underline; text-underline-offset: 4px; }

.mobile-cta { display: none; }

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 720ms cubic-bezier(.2,.7,.2,1), transform 720ms cubic-bezier(.2,.7,.2,1);
}

.js .reveal.is-visible { opacity: 1; transform: translateY(0); }
.js .learning-steps .reveal:nth-child(2) { transition-delay: 60ms; }
.js .learning-steps .reveal:nth-child(3) { transition-delay: 120ms; }
.js .learning-steps .reveal:nth-child(4) { transition-delay: 180ms; }
.js .learning-steps .reveal:nth-child(5) { transition-delay: 240ms; }

.js .hero-reveal {
  opacity: 0;
  animation: hero-enter 760ms cubic-bezier(.2,.75,.2,1) forwards;
}

.js .audience { animation-delay: 80ms; }
.js .hero h1 span { animation-delay: 150ms; }
.js .hero h1 strong { animation-delay: 230ms; }
.js .hero h1 em { animation-delay: 310ms; }
.js .hero-lead { animation-delay: 390ms; }
.js .hero-action { animation-delay: 470ms; }
.js .hero-meta { animation-delay: 530ms; }
.js .hero-note { animation-delay: 570ms; }
.js .hero-object { animation-delay: 260ms; }
.js .hero-scope { animation-delay: 590ms; }

@keyframes hero-enter {
  from { opacity: 0; transform: translateY(26px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1080px) {
  .site-header nav { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .hero-inner { grid-template-columns: minmax(0, 1fr) minmax(350px, .78fr); gap: 34px; }
  .hero h1 strong { font-size: clamp(50px, 6.3vw, 76px); }
  .hero-object { min-height: 560px; }
  .hero-phone { right: 22%; width: min(280px, 58%); }
  .belief-grid { grid-template-columns: 170px minmax(0,1fr); gap: 42px; }
  .scope-grid, .themes-grid, .learning-grid, .archive-grid, .access-grid, .faq-grid { gap: 60px; }
  .developer-copy { padding-right: 5vw; padding-left: 5vw; }
}

@media (max-width: 820px) {
  body { font-size: 16px; }
  .content-width { width: min(calc(100% - 44px), var(--content)); }
  .section { padding: 82px 0; }
  .site-header { min-height: 68px; padding: 0 22px; }
  .brand img { width: 152px; }
  .header-cta { min-height: 42px; padding: 0 15px; font-size: 12px; }
  .reading-line { right: 8px; }
  .hero { min-height: auto; }
  .hero::after { display: none; }
  .hero-inner {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    width: min(calc(100% - 44px), 680px);
    min-height: auto;
    padding: 116px 0 58px;
  }
  .hero-copy { max-width: none; }
  .hero h1 strong { max-width: 680px; font-size: clamp(46px, 10vw, 72px); }
  .hero-object { min-height: 620px; }
  .hero-phone { right: 31%; width: min(310px, 50%); }
  .archive-sheet--back { right: 5%; width: 58%; }
  .archive-sheet--front { right: 11%; width: 58%; }
  .hero-scope { grid-column: 1; }
  .scroll-mark { display: none; }
  .belief-grid { grid-template-columns: 1fr; }
  .chapter { display: flex; align-items: center; gap: 18px; padding: 0; }
  .chapter i { flex: 1; margin: 0; }
  .method-line { grid-template-columns: 1fr; gap: 0; }
  .method-line b { transform: rotate(90deg); justify-self: start; margin: 4px 0 12px 20px; }
  .scope { min-height: auto; }
  .scope-grid, .themes-grid, .learning-grid, .archive-grid, .access-grid, .faq-grid { grid-template-columns: 1fr; }
  .scope-grid { min-height: auto; }
  .scope-number { font-size: 230px; }
  .themes-media { min-height: 720px; }
  .learning-heading { position: static; }
  .archive-visual { min-height: 620px; }
  .developer { grid-template-columns: 1fr; }
  .developer-photo { min-height: 780px; }
  .developer-copy { max-width: none; padding: 82px 22px; }
  .site-footer { grid-template-columns: 1fr; justify-items: start; padding: 44px 22px 110px; }
  .site-footer p { display: none; }
  .mobile-cta {
    position: fixed;
    right: 12px;
    bottom: 12px;
    left: 12px;
    z-index: 250;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 58px;
    padding: 0 20px;
    color: var(--ink-deep);
    background: var(--orange);
    border: 3px solid var(--orange-light);
    border-radius: 4px;
    box-shadow: inset 0 -2px 0 rgba(90,22,0,.22), 0 5px 0 #6e2c17, 0 10px 22px rgba(0,0,0,.2);
    font-size: 14px;
    font-weight: 900;
  }
  .mobile-cta b { font-size: 22px; }
}

@media (max-width: 560px) {
  .site-header .header-cta { display: none; }
  .hero-inner { width: min(calc(100% - 36px), 520px); padding-top: 98px; }
  .audience { margin-bottom: 20px; }
  .hero h1 { margin-bottom: 25px; }
  .hero h1 span { font-size: 22px; }
  .hero h1 strong { font-size: clamp(43px, 13vw, 64px); line-height: 1.08; }
  .hero h1 em { margin-top: 15px; font-size: clamp(24px, 7vw, 34px); }
  .hero-lead { font-size: 15px; line-height: 1.75; }
  .hero-action { align-items: stretch; flex-direction: column; gap: 14px; }
  .hero-action .button { width: 100%; }
  .final-actions { flex-direction: column; align-items: stretch; gap: 14px; }
  .final-actions .button { width: 100%; }
  .hero-object { min-height: 540px; }
  .hero-phone { top: 6%; right: 10%; width: 58%; }
  .hero-phone figcaption { display: none; }
  .archive-sheet--back { top: 10%; right: 0; width: 64%; min-height: 320px; }
  .archive-sheet--front { top: 18%; right: 5%; width: 64%; min-height: 300px; }
  .archive-sheet--front strong { margin-top: 54px; font-size: 76px; }
  .hero-scope { grid-template-columns: repeat(2, 1fr); }
  .hero-scope div { padding: 14px 12px; border-bottom: 1px solid rgba(255,255,255,.14); }
  .hero-scope div:first-child { padding-left: 12px; }
  .hero-scope div:nth-child(2) { border-right: 0; }
  .hero-scope dt { font-size: 10px; }
  .hero-scope dd { font-size: 17px; }
  .serif-heading { font-size: clamp(36px, 10.6vw, 54px); line-height: 1.2; }
  .lead { font-size: 18px; }
  .belief-mark { top: -80px; }
  .method-line div { min-height: 90px; }
  .scope-table dd { font-size: 42px; }
  .themes-media { min-height: 720px; }
  .themes-media figure { width: min(270px, 76%); }
  .themes-media > span { font-size: 150px; }
  .cost-lines div { grid-template-columns: 105px 1fr; gap: 14px; }
  .learning-steps li { grid-template-columns: 42px 1fr; gap: 20px; min-height: 130px; }
  .learning-steps::before { left: 20px; }
  .learning-steps li > span { width: 42px; height: 42px; }
  .learning-steps li strong { font-size: 23px; }
  .archive-visual { min-height: 510px; }
  .archive-page { width: 78%; min-height: 350px; padding: 24px; }
  .archive-page strong { margin: 42px 0 34px; font-size: 86px; }
  .archive-page i { margin-top: 15px; }
  .developer-photo { min-height: 640px; }
  .history li { grid-template-columns: 105px 1fr; gap: 16px; }
  .access-copy dl div { grid-template-columns: 110px 1fr; gap: 14px; }
  .faq-list summary { padding-right: 40px; font-size: 17px; }
  .final-cta { padding: 100px 0 130px; }
  .final-inner > img { width: 185px; }
}

@media (max-width: 340px) {
  .hero h1 strong { font-size: 40px; }
  .hero h1 em { font-size: 22px; }
  .hero-object { min-height: 500px; }
  .hero-phone { width: 62%; }
  .archive-page strong { font-size: 74px; }
  .history li { grid-template-columns: 1fr; gap: 2px; }
}

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

/* 2026-08-21 readability revision
   One familiar Japanese gothic family, one green hue, and natural app-screen ratios. */

body {
  font-size: 16px;
  line-height: 1.85;
}

.serif-heading {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 700;
  line-height: 1.34;
  letter-spacing: -.02em;
}

.lead {
  font-size: clamp(18px, 1.65vw, 21px);
  font-weight: 700;
  line-height: 1.75;
}

.section-label,
.audience,
.chapter span {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
}

.section { padding: 96px 0; }

.hero::before,
.hero::after,
.scope::before,
.learning::before,
.final-cta::before {
  display: none;
}

.reading-line,
.hero-index,
.hero-registration,
.belief-mark,
.scope-number,
.final-index,
.themes-media > span,
.archive-sheet {
  display: none;
}

.site-header nav {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .03em;
}

.site-header nav a::after,
.chapter i,
.scroll-mark i {
  background: var(--accent);
}

.header-cta,
.button--primary,
.mobile-cta {
  color: var(--white);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  box-shadow: 0 6px 16px rgba(11, 49, 45, .18);
  font-weight: 700;
}

.header-cta:hover,
.button--primary:hover {
  background: #1f6d65;
  box-shadow: 0 8px 20px rgba(11, 49, 45, .22);
}

.hero-inner {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 390px);
  gap: 40px 76px;
  width: min(calc(100% - 88px), 1180px);
  padding-top: 120px;
}

.hero-copy { max-width: 680px; }

.audience {
  margin-bottom: 22px;
  color: rgba(255,255,255,.72);
}

.hero h1 {
  margin-bottom: 28px;
  line-height: 1.18;
  letter-spacing: -.025em;
}

.hero h1 span {
  margin-bottom: 12px;
  font-size: clamp(21px, 2vw, 28px);
  font-weight: 500;
  letter-spacing: 0;
}

.hero h1 strong {
  max-width: 680px;
  font-size: clamp(44px, 5.2vw, 64px);
  font-weight: 700;
}

.hero h1 em {
  margin-top: 18px;
  color: var(--white);
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 700;
  letter-spacing: -.01em;
}

.hero-lead {
  max-width: 620px;
  color: rgba(255,255,255,.78);
  font-size: 17px;
  line-height: 1.8;
}

.hero-action p,
.final-inner > p {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
}

.hero-object {
  display: grid;
  place-items: center;
  align-self: center;
  min-height: 610px;
}

.hero-phone {
  position: relative;
  top: auto;
  right: auto;
  width: min(330px, 100%);
  transform: none;
}

.hero-phone::before {
  display: none;
}

.hero-phone figcaption {
  position: static;
  width: auto;
  margin-bottom: 10px;
  color: rgba(255,255,255,.68);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .03em;
  text-align: left;
}

.hero-phone figcaption::after { display: none; }

.hero-phone img,
.themes-media img {
  width: 100%;
  height: auto !important;
  aspect-ratio: 390 / 844;
  object-fit: contain;
  border: 7px solid #e7ecea;
  border-radius: 23px;
  box-shadow: 0 20px 42px rgba(5, 35, 32, .24);
}

.hero-scope dt {
  font-size: 12px;
  font-weight: 500;
}

.hero-scope dd {
  font-size: 20px;
  font-weight: 700;
}

.hero-scope__total dd,
.scope-table div:last-child dd,
.hero h1 em {
  color: var(--white);
}

.belief-grid { grid-template-columns: 190px minmax(0, 1fr); }

.method-line span,
.history span,
.access-copy dt,
.cost-lines dt {
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
}

.method-line strong { font-size: 24px; font-weight: 700; }
.method-line b { color: var(--teal); }

.scope {
  min-height: auto;
  background: var(--ink);
}

.scope-grid { min-height: 500px; }
.scope-copy .section-label,
.section-label--light,
.developer-role { color: rgba(255,255,255,.72); }
.scope-table dd { font-size: clamp(34px, 3.4vw, 48px); font-weight: 700; }

.themes-grid { grid-template-columns: minmax(340px, .8fr) minmax(0, 1.2fr); }

.themes-media {
  display: block;
  min-height: 0;
  border: 0;
}

.themes-media > p {
  position: static;
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-align: center;
}

.themes-media figure {
  position: relative;
  top: auto;
  left: auto;
  width: min(320px, 80%);
  margin: 0 auto;
  transform: none;
}

.themes-media figure::before { display: none; }

.learning { background: var(--ink); }
.learning-heading > p:last-child,
.learning-steps li p { color: rgba(255,255,255,.68); }
.learning-steps::before { background: rgba(255,255,255,.24); }

.learning-steps li > span,
.learning-steps li:nth-child(4) > span {
  color: var(--white);
  background: var(--accent);
  border-color: var(--ink);
}

.learning-steps li strong { font-size: 24px; font-weight: 700; }

.archive-grid { grid-template-columns: minmax(360px, .85fr) minmax(0, 1.15fr); }

.archive-visual {
  display: grid;
  gap: 18px;
  min-height: 0;
}

.archive-page,
.archive-page--slides,
.archive-page--notes {
  position: relative;
  top: auto;
  right: auto;
  bottom: auto;
  left: auto;
  width: 100%;
  min-height: 0;
  padding: 28px 30px;
  border-top: 3px solid var(--teal);
  box-shadow: none;
  transform: none;
}

.archive-page strong,
.archive-page--notes strong {
  margin: 22px 0 24px;
  color: var(--teal);
  font-size: clamp(50px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: -.03em;
}

.archive-volume {
  margin-top: 30px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.archive-volume span,
.archive-volume strong,
.archive-volume small {
  display: block;
}

.archive-volume span {
  margin-bottom: 4px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
}

.archive-volume strong {
  font-size: clamp(24px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.015em;
}

.archive-volume small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.developer-name { font-size: 24px; font-weight: 700; }
.history p { font-weight: 500; }

.guidance { border-top: 3px solid var(--teal); }
.guidance strong { font-size: clamp(22px, 2.4vw, 30px); font-weight: 700; }
.guidance-label {
  display: block;
  margin-bottom: 4px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
}

.faq-list summary { font-size: 18px; font-weight: 700; }
.faq-list summary::before,
.faq-list summary::after { background: var(--teal); }

.final-cta { background: var(--ink); }

@media (max-width: 820px) {
  .section { padding: 76px 0; }
  .hero-inner {
    grid-template-columns: 1fr;
    width: min(calc(100% - 44px), 680px);
    padding-top: 106px;
  }
  .hero h1 strong { font-size: clamp(42px, 8vw, 56px); }
  .hero-object { min-height: 0; padding: 28px 0 12px; }
  .hero-phone { width: min(300px, 62vw); }
  .belief-grid { grid-template-columns: 1fr; }
  .themes-grid,
  .archive-grid { grid-template-columns: 1fr; }
  .themes-media { min-height: 0; }
  .archive-visual { min-height: 0; }
}

@media (max-width: 560px) {
  body { font-size: 15.5px; }
  .hero-inner { padding-top: 92px; }
  .hero h1 span { font-size: 19px; }
  .hero h1 strong { font-size: clamp(36px, 10.5vw, 44px); }
  .hero h1 em { font-size: clamp(22px, 6.4vw, 27px); }
  .hero-lead { font-size: 15.5px; }
  .serif-heading { font-size: clamp(30px, 8.4vw, 38px); line-height: 1.4; }
  .lead { font-size: 17px; }
  .hero-phone { width: min(270px, 72vw); }
  .themes-media figure { width: min(270px, 78vw); }
  .scope-table dd { font-size: 36px; }
  .archive-page strong,
  .archive-page--notes strong { font-size: 54px; }
  .developer-identity { padding: 22px; }
  .developer-name { font-size: 22px; }
  .developer-credentials { margin-top: 14px; padding-top: 11px; }
  .developer-credentials li { font-size: 12px; }
  .mobile-cta {
    border: 1px solid var(--accent);
    box-shadow: 0 6px 18px rgba(11,49,45,.24);
  }
}

@media (max-width: 340px) {
  .hero h1 strong { font-size: 34px; }
  .hero h1 em { font-size: 21px; }
  .hero-phone { width: 250px; }
}

/* 2026-08-24 hero rewrite + cost-efficiency evidence
   Coverage first, order as the differentiator, and the 151-theme index shown as data. */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.cost-start {
  margin-top: 30px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cost-start span,
.cost-start strong,
.cost-start small { display: block; }

.cost-start span {
  margin-bottom: 4px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
}

.cost-intro {
  max-width: 39rem;
  margin: 22px 0 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.85;
}

.cost-start__score {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 6px 0 10px;
}

.cost-start__score b {
  color: var(--teal);
  font-size: clamp(34px, 4.1vw, 50px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
}

.cost-start .cost-start__score small {
  display: inline;
  margin: 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.cost-start strong {
  font-size: clamp(24px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.015em;
}

.cost-start small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.cost-table-wrap { margin-top: 28px; overflow-x: auto; }

.cost-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.cost-table caption {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  text-align: left;
}

.cost-table th,
.cost-table td {
  padding: 13px 10px;
  text-align: left;
  vertical-align: middle;
}

.cost-table thead th {
  color: var(--teal);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
  border-bottom: 2px solid var(--ink);
}

.cost-table tbody th {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.cost-table tbody tr { border-bottom: 1px solid var(--line); }
.cost-table td { white-space: nowrap; }
.cost-table td b { font-size: 20px; font-weight: 700; }
.cost-table td span { color: var(--teal); letter-spacing: .06em; }

.cost-table td .cost-score {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
}

.cost-table th:first-child,
.cost-table td:first-child { padding-left: 0; }

.cost-table__contrast { background: rgba(23, 63, 58, .04); }

.cost-table__contrast th i {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
  font-weight: 500;
}

.cost-table__contrast td span { color: var(--muted); }

.cost-contrast {
  margin-top: 20px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.8;
}

@media (max-width: 820px) {
  .hero-scope { order: 1; }
  .hero-object { order: 2; }

  .cost-table-wrap { overflow-x: visible; }

  .cost-table,
  .cost-table caption,
  .cost-table tbody,
  .cost-table tr,
  .cost-table th,
  .cost-table td {
    display: block;
    width: 100%;
  }

  .cost-table thead { display: none; }

  .cost-table tbody tr {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
  }

  .cost-table tbody th { padding: 0 0 10px; }

  .cost-table td {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 4px 0;
  }

  .cost-table td::before {
    content: attr(data-label);
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
  }

  .cost-table td b { font-size: 17px; }

  .cost-table__contrast {
    padding-inline: 14px;
    border-radius: 4px;
  }
}

.cost-table td .qty { color: var(--ink); white-space: nowrap; }
.hero h1 em .nb {
  display: inline;
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  white-space: nowrap;
}

/* 2026-08-30 語の途中で折り返させない。
   .hero h1 em .nb は見出し専用の指定なので、本文用に汎用ルールを置く */
.nb { white-space: nowrap; }

/* 2026-08-31 evidence-led product screens and source material */

section[id] { scroll-margin-top: 86px; }

.site-header nav { gap: 26px; }

.ai-caution {
  display: grid;
  grid-template-columns: minmax(150px, .32fr) minmax(0, 1fr) minmax(0, .8fr);
  gap: 32px;
  align-items: start;
  margin-top: 56px;
  padding: 26px 0 0;
  color: rgba(255,255,255,.78);
  border-top-color: rgba(255,255,255,.28);
  font-size: 14px;
  line-height: 1.85;
}

.ai-caution > span {
  color: #a8d3cc;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .05em;
}

.ai-caution p { margin: 0; }

.ai-caution b {
  color: var(--white);
  font-weight: 700;
}

.product-proof {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.product-proof-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, .75fr);
  gap: 24px 80px;
  align-items: end;
}

.product-proof-heading .section-label { grid-column: 1 / -1; margin-bottom: 0; }
.product-proof-heading .serif-heading { margin-bottom: 0; }
.product-proof-heading .lead { margin: 0 0 6px; }

.screen-story {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(250px, .65fr);
  gap: 46px;
  align-items: end;
  margin-top: 64px;
}

.screen-proof { margin: 0; }

.screen-proof__image {
  overflow: hidden;
  background: #eef1ef;
  border: 1px solid var(--line);
}

.screen-proof__image--explanation { aspect-ratio: 1 / 1; }

.screen-proof__image--explanation img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 75%;
}

.screen-proof__image--phone {
  width: min(294px, 100%);
  margin-inline: auto;
  overflow: hidden;
  background: #e7ecea;
  border: 6px solid #e7ecea;
  border-radius: 22px;
  box-shadow: 0 18px 38px rgba(5,35,32,.18);
}

.screen-proof__image--phone img {
  width: 100%;
  height: auto;
}

.screen-proof figcaption {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--ink);
}

.screen-proof figcaption span,
.mock-proof__copy > span {
  display: block;
  margin-bottom: 7px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
}

.screen-proof figcaption strong {
  display: block;
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.5;
  letter-spacing: -.015em;
}

.screen-proof figcaption p {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.tutor-grounding {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  list-style: none;
}

.tutor-grounding li {
  min-width: 0;
  padding: 12px 8px 13px;
  border-right: 1px solid var(--line);
}

.tutor-grounding li:last-child { border-right: 0; }

.tutor-grounding b,
.tutor-grounding span { display: block; }

.tutor-grounding b {
  margin-bottom: 3px;
  color: var(--teal);
  font-size: 11px;
}

.tutor-grounding span {
  font-size: 11px;
  font-weight: 700;
  line-height: 1.5;
}

.tutor-limit {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
}

.mock-proof {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(390px, .85fr);
  gap: 70px;
  align-items: center;
  margin-top: 74px;
  padding: 38px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.mock-proof h3 {
  margin: 0;
  font-size: clamp(24px, 2.5vw, 34px);
  line-height: 1.45;
  letter-spacing: -.02em;
}

.mock-proof__copy p {
  max-width: 690px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.mock-proof dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  border-left: 1px solid var(--line);
}

.mock-proof dl div {
  padding: 8px 18px 10px;
  border-right: 1px solid var(--line);
}

.mock-proof dt {
  color: var(--muted);
  font-size: 11px;
}

.mock-proof dd {
  margin: 2px 0 0;
  font-size: clamp(19px, 2vw, 25px);
  font-weight: 700;
  line-height: 1.4;
}

.screen-source-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.archive-visual {
  display: block;
  min-height: 650px;
}

.source-page {
  position: absolute;
  margin: 0;
  background: var(--white);
  box-shadow: 14px 18px 0 rgba(23,63,58,.08);
}

.source-page img {
  width: 100%;
  height: auto;
}

.source-page__media {
  overflow: hidden;
  background: #f7f8f7;
}

.source-page__media--slide { aspect-ratio: 4 / 3; }
.source-page__media--note { aspect-ratio: 4 / 5; }

.source-page .source-page__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.source-page__media--note img {
  object-position: 43% 43%;
  transform: scale(1.08);
}

.source-page figcaption {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 14px 13px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.5;
}

.source-page figcaption span { color: var(--muted); }
.source-page figcaption strong { font-weight: 700; }

.source-page--slide {
  top: 0;
  left: 0;
  width: 86%;
}

.source-page--note {
  right: 0;
  bottom: 0;
  z-index: 2;
  width: 47%;
}

.source-count {
  position: absolute;
  left: 0;
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin: 0;
  color: var(--teal);
}

.source-count b {
  font-size: clamp(32px, 4.4vw, 54px);
  line-height: 1;
  letter-spacing: -.04em;
}

.source-count span {
  color: var(--muted);
  font-size: 12px;
}

.source-count--slides { bottom: 88px; }
.source-count--notes { bottom: 32px; }

@media (max-width: 1080px) {
  .site-header nav { gap: 18px; }
  .mock-proof { grid-template-columns: minmax(0, 1fr) minmax(330px, .8fr); gap: 40px; }
}

@media (max-width: 820px) {
  section[id] { scroll-margin-top: 74px; }

  .ai-caution,
  .product-proof-heading,
  .screen-story,
  .mock-proof {
    grid-template-columns: 1fr;
  }

  .ai-caution { gap: 16px; }
  .product-proof-heading { gap: 16px; }
  .screen-story { gap: 64px; margin-top: 46px; }
  .screen-proof--home { max-width: 520px; margin-inline: auto; }
  .screen-proof__image--phone { width: min(280px, 72vw); }
  .mock-proof { gap: 28px; margin-top: 58px; }
  .mock-proof dl { border-top: 1px solid var(--line); border-left: 0; }
  .mock-proof dl div { padding-top: 14px; }

  .archive-visual {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(180px, .62fr);
    gap: 20px;
    min-height: 0;
    align-items: end;
  }

  .source-page,
  .source-page--slide,
  .source-page--note {
    position: relative;
    top: auto;
    right: auto;
    bottom: auto;
    left: auto;
    width: 100%;
  }

  .source-page--slide { grid-column: 1 / -1; }
  .source-page--note { grid-column: 2; }
  .source-count { position: static; }
  .source-count--slides { grid-column: 1; grid-row: 2; align-self: start; }
  .source-count--notes { grid-column: 1; grid-row: 2; align-self: end; }
}

@media (max-width: 560px) {
  .ai-caution { font-size: 13.5px; }
  .screen-proof__image--explanation { aspect-ratio: 1 / 1; }
  .screen-proof__image--explanation img { object-position: 50% 75%; }
  .screen-proof figcaption strong { font-size: 20px; }
  .tutor-grounding { grid-template-columns: 1fr; }
  .tutor-grounding li { display: grid; grid-template-columns: 24px 1fr; align-items: center; border-right: 0; border-bottom: 1px solid var(--line); }
  .tutor-grounding li:last-child { border-bottom: 0; }
  .tutor-grounding b { margin: 0; }
  .mock-proof dl { grid-template-columns: 1fr; }
  .mock-proof dl div { display: flex; justify-content: space-between; gap: 20px; border-right: 0; border-bottom: 1px solid var(--line); }
  .mock-proof dl div:last-child { border-bottom: 0; }
  .mock-proof dd { font-size: 19px; }

  .archive-visual { grid-template-columns: 1fr; }
  .source-page--slide,
  .source-page--note,
  .source-count--slides,
  .source-count--notes { grid-column: 1; grid-row: auto; }
  .source-page--note { width: min(78%, 330px); justify-self: end; }
  .source-count { justify-content: space-between; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
  .source-count b { font-size: 36px; }
}