:root {
  --ink: #123b45;
  --ink-soft: #1b5b54;
  --paper: #eff5df;
  --paper-deep: #dcebd0;
  --sand: #b7d995;
  --ember: #e97942;
  --ember-deep: #2a7862;
  --moss: #5ca45d;
  --stone: #688777;
  --white: #f8fff3;
  --water: #13a6c3;
  --sun: #f4c65d;
  --line: rgba(18, 59, 69, 0.24);
  --max: 1240px;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Avenir Next", "Hiragino Sans", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--ink);
  font-family: var(--sans);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
:focus-visible { outline: 3px solid var(--ember); outline-offset: 4px; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.5rem 0.75rem;
  color: var(--white);
  background: var(--ember-deep);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: absolute;
  z-index: 5;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.25rem 5vw;
  color: var(--white);
}
.brand { display: inline-flex; align-items: center; gap: 0.65rem; text-decoration: none; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  color: var(--ink);
  background: var(--ember);
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 900;
  line-height: 1;
}
.brand__word { letter-spacing: 0.28em; font-size: 0.82rem; font-weight: 800; }
.header-cta {
  padding: 0.45rem 0.85rem;
  color: var(--white);
  border: 1px solid rgba(248, 243, 231, 0.55);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
}
.hero__media { position: absolute; inset: 0; overflow: hidden; }
.hero__media::after { position: absolute; inset: 0; background: rgba(11, 55, 60, 0.18); content: ""; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; object-position: 58% center; animation: slow-push 16s ease-out both; }
.hero__stamp {
  position: absolute;
  z-index: 1;
  right: 1rem;
  bottom: 1rem;
  padding: 0.35rem 0.5rem;
  color: var(--white);
  border: 1px solid rgba(248, 243, 231, 0.45);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
}
.hero__content {
  position: relative;
  z-index: 2;
  align-self: end;
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 7rem 1.25rem 5.5rem;
}
.eyebrow { margin: 0 0 1.25rem; color: var(--paper-deep); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.16em; }
.eyebrow--rust { color: var(--ember-deep); }
.eyebrow--ember { color: var(--ember); }
.hero h1 {
  max-width: 10em;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3.35rem, 15vw, 8rem);
  font-weight: 900;
  letter-spacing: -0.08em;
  line-height: 0.98;
}
.hero h1 em { color: var(--ember); font-style: normal; }
.hero__lead { max-width: 35rem; margin: 1.75rem 0 0; color: rgba(248, 243, 231, 0.87); font-size: 0.92rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
.hero__meta { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1.25rem 0 0; color: rgba(248, 243, 231, 0.66); font-size: 0.68rem; letter-spacing: 0.08em; }
.hero__meta span::before { margin-right: 0.42rem; color: var(--ember); content: "•"; }
.hero__scroll { position: absolute; z-index: 2; bottom: 1.25rem; left: 1.25rem; display: flex; align-items: center; gap: 0.55rem; color: rgba(248, 243, 231, 0.7); font-size: 0.62rem; letter-spacing: 0.16em; text-decoration: none; }
.hero__scroll span { color: var(--ember); font-size: 1rem; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 0.75rem; min-height: 3.1rem; padding: 0.7rem 1.1rem; border: 1px solid transparent; cursor: pointer; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.06em; text-decoration: none; transition: transform 160ms ease, background-color 160ms ease, color 160ms ease; }
.button:hover { transform: translateY(-2px); }
.button span { font-size: 1rem; }
.button--primary { color: var(--white); background: var(--ember); border-color: var(--ember); }
.button--primary:hover { background: #d77a43; }
.button--quiet { color: var(--white); background: rgba(23, 23, 19, 0.34); border-color: rgba(248, 243, 231, 0.48); }
.button--quiet:hover { background: rgba(248, 243, 231, 0.12); }
.button--wide { width: 100%; }

.section { padding: 5.5rem 1.25rem; }
.section-heading { max-width: 48rem; margin: 0 auto 2.5rem; }
.section-heading h2 { margin: 0; font-family: var(--serif); font-size: clamp(2rem, 6vw, 4.4rem); letter-spacing: -0.06em; line-height: 1.15; }
.section-heading p:last-child { max-width: 34rem; margin: 1rem 0 0; color: rgba(23, 23, 19, 0.68); font-size: 0.92rem; }
.section-heading--light h2 { color: var(--white); }
.section-heading--light p:last-child { color: rgba(248, 243, 231, 0.67); }
.section--paper { background: var(--paper); }
.section--forest { color: var(--paper); background: var(--ink-soft); }
.section--sunlit { background: var(--sand); }
.section--register { padding-top: 2rem; background: var(--paper-deep); }

.loop-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: var(--max); margin: 0 auto; padding: 0; list-style: none; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.loop-card { position: relative; min-height: 13rem; padding: 1.15rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.loop-card__number { display: block; color: var(--ember-deep); font-size: 0.66rem; letter-spacing: 0.12em; }
.loop-card__icon { display: block; margin: 0.85rem 0 0.45rem; color: var(--ember); font-family: var(--serif); font-size: 1.5rem; }
.loop-card h3 { margin: 0; font-family: var(--serif); font-size: 1.35rem; letter-spacing: -0.04em; }
.loop-card p { margin: 0.45rem 0 0; color: rgba(23, 23, 19, 0.68); font-size: 0.78rem; line-height: 1.65; }
.loop-card--counter { background: rgba(233, 121, 66, 0.14); }
.loop-card--treasure { background: rgba(19, 166, 195, 0.14); }

.feature-grid { display: grid; max-width: var(--max); margin: 0 auto; border-top: 1px solid rgba(248, 243, 231, 0.2); }
.feature-card { padding: 1.75rem 0 2rem; border-bottom: 1px solid rgba(248, 243, 231, 0.2); }
.feature-card__label { color: var(--ember); font-size: 0.66rem; letter-spacing: 0.14em; }
.feature-card h3 { max-width: 20rem; margin: 1.2rem 0 0; color: var(--white); font-family: var(--serif); font-size: clamp(1.45rem, 5vw, 2.45rem); letter-spacing: -0.05em; line-height: 1.25; }
.feature-card p { max-width: 32rem; margin: 0.9rem 0 0; color: rgba(248, 243, 231, 0.68); font-size: 0.88rem; }
.feature-card__rule { display: block; width: 3.5rem; height: 0.18rem; margin-top: 1.6rem; background: var(--ember); }

.development-layout { display: grid; max-width: var(--max); margin: 0 auto; gap: 3rem; }
.development-notes { border-top: 1px solid rgba(23, 23, 19, 0.28); }
.development-notes article { display: grid; grid-template-columns: 2.5rem 1fr; column-gap: 1rem; padding: 1.35rem 0; border-bottom: 1px solid rgba(23, 23, 19, 0.28); }
.development-notes span { grid-row: span 2; color: var(--ember-deep); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.1em; }
.development-notes h3 { margin: 0; font-family: var(--serif); font-size: 1.25rem; }
.development-notes p { margin: 0.25rem 0 0; color: rgba(23, 23, 19, 0.68); font-size: 0.82rem; }

.register-card { display: grid; max-width: 980px; margin: 0 auto; background: var(--ink); color: var(--white); }
.register-card__copy, .register-form { padding: 1.5rem; }
.register-card h2 { margin: 0; font-family: var(--serif); font-size: clamp(2rem, 7vw, 3.7rem); letter-spacing: -0.07em; line-height: 1.12; }
.register-card__copy > p:not(.eyebrow):not(.register-card__small) { max-width: 25rem; margin: 1.15rem 0 0; color: rgba(248, 243, 231, 0.72); font-size: 0.9rem; }
.register-card__small { max-width: 25rem; margin: 1.4rem 0 0; color: rgba(248, 243, 231, 0.47); font-size: 0.7rem; }
.register-form { background: #174b49; }
.form-trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.field label { display: block; margin-bottom: 0.45rem; color: var(--paper); font-size: 0.78rem; font-weight: 800; }
.field input[type="email"] { width: 100%; min-height: 3.2rem; padding: 0.75rem 0.85rem; color: var(--white); background: var(--ink); border: 1px solid rgba(248, 243, 231, 0.36); border-radius: 0; }
.field input[type="email"]::placeholder { color: rgba(248, 243, 231, 0.42); }
.field input[type="email"]:focus { border-color: var(--ember); outline: 3px solid rgba(201, 105, 53, 0.28); outline-offset: 0; }
.field__help { margin: 0.5rem 0 0; color: rgba(248, 243, 231, 0.5); font-size: 0.68rem; line-height: 1.55; }
.consent { display: flex; align-items: flex-start; gap: 0.65rem; margin: 1.25rem 0; color: rgba(248, 243, 231, 0.72); font-size: 0.72rem; line-height: 1.6; }
.consent input { flex: 0 0 auto; width: 1.1rem; height: 1.1rem; margin: 0.12rem 0 0; accent-color: var(--ember); }
.consent a, .site-footer a { color: var(--paper); text-underline-offset: 0.2em; }
.form-message { min-height: 2.5rem; margin: 0.9rem 0 0; font-size: 0.76rem; line-height: 1.55; }
.form-message[data-state="pending"] { color: var(--paper-deep); }
.form-message[data-state="success"] { color: #b9d19b; }
.form-message[data-state="error"] { color: #f0a17c; }
.register-form [disabled] { cursor: wait; opacity: 0.6; }

.site-footer { display: grid; gap: 1.25rem; padding: 2.5rem 1.25rem 3rem; color: rgba(248, 243, 231, 0.75); background: var(--ink); font-size: 0.72rem; }
.site-footer__copy { max-width: 40rem; }
.site-footer__copy p { margin: 0.15rem 0; }
.site-footer__nav { display: flex; flex-wrap: wrap; gap: 0.85rem 1.25rem; margin-top: 0.9rem; }
.site-footer__nav a { display: inline-block; }
.site-footer > nav { display: flex; flex-wrap: wrap; gap: 0.85rem 1.25rem; }
.site-footer__legal { margin: 0; color: rgba(248, 243, 231, 0.38); }

.legal-page .site-header { position: relative; max-width: var(--max); margin: 0 auto; }
.legal { max-width: 800px; margin: 0 auto; padding: 4rem 1.25rem 6rem; color: var(--paper); }
.legal h1 { margin: 0; color: var(--white); font-family: var(--serif); font-size: clamp(2.4rem, 8vw, 5rem); letter-spacing: -0.08em; line-height: 1.1; }
.legal h2 { margin: 3rem 0 0.8rem; color: var(--white); font-family: var(--serif); font-size: 1.45rem; letter-spacing: -0.04em; }
.legal p, .legal li { color: rgba(248, 255, 243, 0.74); font-size: 0.88rem; line-height: 1.9; }
.legal ul { margin: 0.75rem 0 0; padding-left: 1.35rem; }
.legal a { color: var(--white); text-underline-offset: 0.2em; }
.legal .eyebrow { margin-bottom: 1rem; color: var(--ember); }
.legal .updated { margin: 1rem 0 3rem; color: rgba(248, 255, 243, 0.48); font-size: 0.72rem; }
.legal .back { margin-top: 4rem; }

@keyframes slow-push { from { transform: scale(1); } to { transform: scale(1.045); } }

@media (min-width: 700px) {
  .site-header { padding: 1.5rem 5vw; }
  .hero__content { padding: 8rem 5vw 7rem; }
  .hero__scroll { left: 5vw; }
  .hero__media { left: 24%; }
  .hero__media::after { background: rgba(9, 62, 63, 0.06); }
  .hero__content::before { position: absolute; z-index: -1; top: 0; bottom: 0; left: 0; width: 64%; background: rgba(10, 65, 60, 0.68); content: ""; }
  .section { padding: 8rem 5vw; }
  .section--register { padding-top: 4rem; }
  .loop-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .loop-card { min-height: 16rem; padding: 1.5rem; }
  .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 2rem; border-bottom: 1px solid rgba(248, 243, 231, 0.2); }
  .feature-card { min-height: 23rem; padding: 1.75rem 0.5rem 2rem 0; border-bottom: 0; }
  .development-layout { grid-template-columns: 1fr 1fr; align-items: start; gap: 8vw; }
  .development-layout .section-heading { margin: 0; }
  .register-card { grid-template-columns: 1fr 1fr; }
  .register-card__copy, .register-form { padding: 3rem; }
  .site-footer { grid-template-columns: auto 1fr auto; align-items: start; padding: 3rem 5vw; }
  .legal { padding-right: 5vw; padding-left: 5vw; }
}

@media (min-width: 1100px) {
  .hero__content { padding-left: max(5vw, calc((100vw - var(--max)) / 2)); }
  .hero__media { left: 14%; }
  .hero__media::after { background: rgba(9, 62, 63, 0.04); }
  .hero__content::before { width: 58%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
  .button:hover { transform: none; }
}