@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;500;600&family=Shippori+Mincho:wght@400;500;600&display=swap');

:root {
  --paper: #f3f0e8;
  --paper-deep: #e8e3d8;
  --ink: #22231f;
  --muted: #77776f;
  --line: #d2cdc1;
  --accent: #777c68;
  --serif: "Shippori Mincho", "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--serif); line-height: 2; letter-spacing: .035em; }
a { color: inherit; }
.skip-link { position: absolute; top: -100px; left: 1rem; z-index: 10; background: var(--ink); color: var(--paper); padding: .5rem 1rem; }
.skip-link:focus { top: 1rem; }
.site-header { height: 78px; padding: 0 clamp(20px, 5vw, 72px); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.wordmark { display: inline-flex; align-items: baseline; gap: 12px; text-decoration: none; }
.wordmark-jp { font-size: 1.35rem; letter-spacing: .18em; }
.wordmark-en { font: 500 .67rem var(--sans); letter-spacing: .24em; }
.header-nav { display: flex; gap: clamp(14px, 3vw, 36px); font: .73rem var(--sans); letter-spacing: .04em; }
.header-nav a, .text-link, .back-link { text-decoration: none; }
.header-nav a:hover, .back-link:hover, .text-link:hover { opacity: .58; }
.hero { min-height: 570px; padding: 100px 24px 96px; text-align: center; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.eyebrow, .section-index { font: .68rem var(--sans); letter-spacing: .18em; color: var(--muted); }
.hero h1 { font-size: clamp(2.2rem, 5vw, 4.3rem); font-weight: 400; line-height: 1.65; letter-spacing: .12em; margin: 30px 0 14px; }
.hero-en { font-size: clamp(1rem, 2vw, 1.25rem); line-height: 1.9; letter-spacing: .08em; margin: 0; }
.hero-rule, .philosophy-rule { height: 56px; width: 1px; background: var(--line); margin: 35px auto 28px; }
.hero-rule span { display: block; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); transform: translate(-2px, 26px); }
.hero-intro { max-width: 660px; margin: 0 auto 12px; font-size: .94rem; }
.en, .translation { color: var(--muted); font-size: .88rem; line-height: 1.95; letter-spacing: .015em; }
.text-link { margin-top: 28px; font: .76rem var(--sans); letter-spacing: .12em; border-bottom: 1px solid var(--ink); padding-bottom: 5px; }
.section { display: grid; grid-template-columns: minmax(130px, .7fr) minmax(0, 2fr); gap: clamp(28px, 7vw, 110px); padding: 94px clamp(24px, 10vw, 150px); border-top: 1px solid var(--line); }
.section-index { padding-top: 12px; white-space: nowrap; }
.section-body { max-width: 790px; }
.section h2 { font-size: clamp(1.65rem, 3vw, 2.35rem); font-weight: 400; line-height: 1.6; margin: 0 0 30px; letter-spacing: .06em; }
.section h2 span, .step h3 span, .practice-step h3 span, .material-grid h3 span, .statement span, .closing-line span { display: block; color: var(--muted); font: .83rem/1.8 var(--sans); letter-spacing: .035em; margin-top: 4px; }
.section p { margin: 0 0 16px; }
.lead { font-size: 1.12rem; }
.section-intro { margin-bottom: 0; }
.step-list { margin-top: 44px; }
.step { display: grid; grid-template-columns: 54px minmax(0, 1fr); gap: 22px; padding: 30px 0; border-top: 1px solid var(--line); }
.step-number { font: .76rem var(--sans); letter-spacing: .1em; color: var(--accent); padding-top: 7px; }
.step h3, .practice-step h3 { margin: 0 0 14px; font-size: 1.12rem; font-weight: 500; line-height: 1.7; }
.step h3 span, .practice-step h3 span { font-size: .78rem; font-weight: 400; }
.note { padding: 12px 16px; background: rgba(255,255,255,.34); font-size: .86rem; }
.note strong { font-weight: 600; }
.materials { background: var(--paper-deep); }
.material-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 32px; }
.material-grid article { border-top: 1px solid #c5c0b4; padding-top: 16px; }
.material-grid h3 { font-size: 1.05rem; font-weight: 500; margin: 0 0 12px; }
.material-grid h3 span { font-size: .73rem; }
.material-grid p { font-size: .9rem; }
.practice-step { padding: 25px 0; border-top: 1px solid var(--line); }
.wave-notes { margin: 24px 0; padding: 20px 24px; border-left: 1px solid var(--accent); }
.wave-notes p { margin-bottom: 14px; }
.wave-notes p:last-child { margin-bottom: 0; }
.wave-mark { display: inline-block; min-width: 50px; color: var(--accent); font-size: 1.2rem; }
.statement { margin-top: 34px !important; font-size: 1.3rem; text-align: center; padding: 26px 12px; }
.philosophy { text-align: center; padding: 110px 24px 120px; background: #e5e1d7; }
.philosophy h2 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 400; letter-spacing: .09em; line-height: 1.8; margin: 28px 0 10px; }
.philosophy-en { font-size: 1.05rem; line-height: 1.9; }
.philosophy-rule { margin: 36px auto; }
.philosophy > p:not(.eyebrow):not(.philosophy-en):not(.closing-line) { max-width: 680px; margin: 14px auto; }
.philosophy .translation { margin-top: -5px !important; }
.closing-line { margin-top: 60px; font-size: 1.2rem; letter-spacing: .1em; }
.site-footer { padding: 42px 24px 50px; text-align: center; border-top: 1px solid var(--line); }
.footer-mark { justify-content: center; }
.site-footer > p { color: var(--muted); font: .7rem/1.8 var(--sans); letter-spacing: .04em; }
.back-link { display: inline-block; margin: 20px 0 8px; font: .8rem var(--sans); border-bottom: 1px solid var(--line); padding-bottom: 4px; }
.footer-note { margin-top: 18px !important; }
@media (max-width: 760px) {
  .site-header { height: auto; min-height: 72px; padding: 16px 20px; align-items: flex-start; gap: 16px; }
  .header-nav { justify-content: flex-end; flex-wrap: wrap; gap: 8px 14px; font-size: .68rem; padding-top: 6px; }
  .wordmark { gap: 7px; flex-shrink: 0; }
  .wordmark-jp { font-size: 1.15rem; }
  .wordmark-en { font-size: .58rem; }
  .hero { min-height: 530px; padding: 76px 22px; }
  .hero h1 { margin-top: 24px; }
  .hero-intro { font-size: .88rem; }
  .section { display: block; padding: 64px 24px; }
  .section-index { margin-bottom: 22px; }
  .section h2 { margin-bottom: 24px; }
  .step { grid-template-columns: 34px minmax(0, 1fr); gap: 13px; }
  .material-grid { grid-template-columns: 1fr; gap: 20px; }
  .material-grid article { padding-top: 14px; }
  .philosophy { padding: 82px 24px 90px; }
}
@media (max-width: 390px) {
  .site-header { display: block; }
  .header-nav { justify-content: flex-start; margin-top: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}