/* 日本語を文節の切れ目で改行する。Chrome以外では無視されるだけなので安全 */
body { word-break: auto-phrase; }

:root {
  --ink: #2f2924;
  --muted: #665e58;
  --cream: #fffaf2;
  --sand: #f1e2cc;
  --apricot: #df8d65;
  --rust: #b55c3d;
  --green: #66725d;
  --line: #dfd2c1;
  --serif: "DM Serif Display", Georgia, serif;
  --sans: "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--cream); font-family: var(--sans); font-size: 15px; line-height: 1.9; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.site-header { position: relative; z-index: 10; background: var(--cream); }
.header-inner { display: flex; min-height: 82px; align-items: center; justify-content: space-between; gap: 24px; }
.brand { color: var(--rust); font-family: var(--serif); font-size: 25px; letter-spacing: .015em; line-height: 1; }
.brand span { display: block; margin: 5px 0 0 1px; color: var(--ink); font-family: var(--sans); font-size: 9px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; }
.site-nav { display: flex; align-items: center; gap: 28px; font-size: 13px; font-weight: 500; }
.site-nav > a:not(.nav-cta) { border-bottom: 1px solid transparent; }
.site-nav > a:not(.nav-cta):hover { border-color: currentColor; }
.nav-cta { padding: 9px 18px; color: #fff; background: var(--rust); border-radius: 999px; }
.menu-button { display: none; border: 0; color: var(--ink); background: transparent; font: inherit; font-size: 13px; }

.hero { overflow: hidden; padding: 35px 0 72px; background: linear-gradient(120deg, #fffaf2 0%, #fff8ee 53%, #f4e1cb 53%, #f4e1cb 100%); }
.hero-grid { display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: 64px; }
.eyebrow { margin: 0 0 13px; color: var(--rust); font-size: 11px; font-weight: 700; letter-spacing: .15em; line-height: 1.5; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; letter-spacing: .015em; line-height: 1.24; }
h1 { margin-bottom: 24px; font-size: clamp(48px, 5.3vw, 76px); }
h2 { margin-bottom: 37px; font-size: clamp(36px, 4vw, 55px); }
.lead { max-width: 430px; margin-bottom: 30px; color: var(--muted); font-size: 16px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 54px; padding: 13px 25px; border-radius: 999px; font-weight: 700; line-height: 1.4; transition: transform .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--rust); box-shadow: 0 8px 22px rgba(181, 92, 61, .22); }
.button span { font-size: 20px; font-weight: 400; }
.hero-note { margin: 17px 0 0; color: var(--muted); font-size: 12px; }
.hero-image-wrap { position: relative; padding: 0 20px 20px 0; }
.hero-image-wrap::after { position: absolute; z-index: 0; right: 0; bottom: 0; width: 76%; height: 55%; content: ""; background: var(--apricot); }
.hero-image { position: relative; z-index: 1; width: 100%; height: 510px; object-fit: cover; object-position: center 45%; border-radius: 130px 0 130px 0; filter: saturate(.86) sepia(.08); }
.photo-caption { position: absolute; z-index: 2; right: 44px; bottom: 12px; margin: 0; padding: 10px 15px; color: var(--ink); background: #fffaf2; font-size: 12px; }

.section { padding: 104px 0; }
.reasons { background: #fff; text-align: center; }
.reason-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: left; }
.reason-card { min-height: 300px; padding: 35px 28px; background: var(--cream); border: 1px solid #f1e6d9; border-radius: 4px; }
.icon-circle { display: grid; width: 45px; height: 45px; margin-bottom: 22px; place-items: center; color: var(--rust); background: var(--sand); border-radius: 50%; }
.icon-circle svg { width: 23px; height: 23px; }
.reason-card h3 { margin-bottom: 13px; font-family: var(--serif); font-size: 25px; font-weight: 400; line-height: 1.35; }
.reason-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

.lesson { background: #f6efe5; }
.lesson-grid { display: grid; grid-template-columns: .87fr 1.13fr; align-items: center; gap: 80px; }
.lesson-image-wrap { position: relative; }
.lesson-image-wrap::before { position: absolute; top: -20px; left: -20px; width: 70%; height: 50%; content: ""; border: 1px solid var(--apricot); }
.lesson-image { position: relative; width: 100%; height: 515px; object-fit: cover; object-position: center; border-radius: 0 100px 0 100px; filter: saturate(.8) sepia(.12); }
.lesson-copy > p:not(.eyebrow) { max-width: 530px; color: var(--muted); font-size: 14px; }
.lesson-steps { display: grid; gap: 22px; margin: 34px 0 0; padding: 0; list-style: none; counter-reset: steps; }
.lesson-steps li { display: grid; grid-template-columns: 47px 1fr; gap: 17px; }
.lesson-steps li > span { color: var(--apricot); font-family: var(--serif); font-size: 21px; }
.lesson-steps strong { display: block; font-size: 14px; }
.lesson-steps p { margin: 2px 0 0; color: var(--muted); font-size: 12px; line-height: 1.75; }

.faq { background: #fff; }
.faq-container { width: min(780px, calc(100% - 48px)); }
.faq-container > .eyebrow, .faq-container > h2 { text-align: center; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 21px 38px 21px 0; cursor: pointer; font-size: 14px; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { position: absolute; top: 22px; right: 4px; content: "+"; color: var(--rust); font-size: 24px; font-weight: 300; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { margin: -2px 28px 22px 0; color: var(--muted); font-size: 13px; }

.contact { padding: 104px 0; color: #fff; background: var(--green); text-align: center; }
.contact .eyebrow { color: #f5cdb3; }
.contact h2 { margin-bottom: 25px; }
.contact-inner > p:not(.eyebrow):not(.area-note) { max-width: 550px; margin: 0 auto 29px; color: #f0eee6; font-size: 14px; }
.button-light { color: var(--ink); background: #fffaf2; }
.line-link { display: block; width: fit-content; margin: 17px auto 0; border-bottom: 1px solid #fff; font-size: 13px; }
.area-note { margin: 39px 0 0; color: #e8e6dd; font-size: 12px; }
.site-footer { padding: 33px 0; background: var(--ink); color: #f9f3e9; }
.site-footer .brand { color: #f7c9a8; }
.site-footer .brand span { color: #f9f3e9; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-inner p { margin: 0; font-size: 11px; }

@media (max-width: 800px) {
  .site-nav { gap: 14px; }
  .hero-grid, .lesson-grid { gap: 38px; }
  .hero-image { height: 440px; }
  .lesson-image { height: 440px; }
}

@media (max-width: 640px) {
  .container, .faq-container { width: min(100% - 32px, 560px); }
  .header-inner { min-height: 68px; }
  .menu-button { display: block; padding: 8px 0; }
  .site-nav { position: absolute; top: 68px; right: 16px; left: 16px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 20px 16px; background: #fffaf2; box-shadow: 0 10px 30px rgba(47, 41, 36, .12); }
  .site-nav.is-open { display: flex; }
  .site-nav > a:not(.nav-cta) { padding: 10px 0; }
  .nav-cta { margin-top: 7px; text-align: center; }
  .hero { padding: 28px 0 57px; background: linear-gradient(145deg, #fffaf2 0%, #fff7ed 58%, #f4e1cb 58%, #f4e1cb 100%); }
  .hero-grid, .lesson-grid { grid-template-columns: 1fr; gap: 39px; }
  h1 { font-size: 51px; }
  h2 { margin-bottom: 28px; font-size: 39px; }
  .lead { font-size: 14px; }
  .hero-image { height: 370px; border-radius: 88px 0 88px 0; }
  .hero-image-wrap { padding-right: 13px; padding-bottom: 13px; }
  .photo-caption { right: 24px; bottom: 5px; font-size: 10px; }
  .section, .contact { padding: 73px 0; }
  .reason-grid { grid-template-columns: 1fr; gap: 14px; }
  .reason-card { min-height: auto; padding: 27px 24px; }
  .lesson-image { height: 370px; border-radius: 0 72px 0 72px; }
  .lesson-image-wrap::before { top: -13px; left: -13px; }
  .lesson-grid { gap: 55px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}