/* Layout concept: つみれと歩く散歩道。石畳の道に沿って、理念 → 場所 → 流れ → 応援と立ち寄っていく一本道の構成 */
:root {
  --paper: #f8f8f1;
  --paper-2: #eef1e4;
  --ink: #2f3a2b;
  --ink-soft: #5d6857;
  --leaf: #5f7a4a;
  --leaf-deep: #435a33;
  --sakura: #d9798d;
  --sakura-soft: #f6dfe3;
  --gold: #a9853a;
  --line: #d9dfcb;
  --card: #ffffff;
  --shadow: 0 10px 30px rgba(67, 90, 51, .10);
  --font-display: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", "Yu Gothic", sans-serif;
  --font-body: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  --font-label: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", sans-serif;
  --wrap: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1b2119; --paper-2: #232b20; --ink: #e9ede0; --ink-soft: #b5bfaa;
    --leaf: #a6c38c; --leaf-deep: #c3dbab; --sakura: #f0a3b3; --sakura-soft: #3a2a2e;
    --gold: #d8b768; --line: #364031; --card: #262e23; --shadow: 0 10px 30px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #1b2119; --paper-2: #232b20; --ink: #e9ede0; --ink-soft: #b5bfaa;
  --leaf: #a6c38c; --leaf-deep: #c3dbab; --sakura: #f0a3b3; --sakura-soft: #3a2a2e;
  --gold: #d8b768; --line: #364031; --card: #262e23; --shadow: 0 10px 30px rgba(0,0,0,.35);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--font-body); font-size: 16px; line-height: 1.9;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--leaf-deep); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--sakura); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.4; text-wrap: balance; margin: 0; }
p { margin: 0; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: 20px; }

/* Header */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 10px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: .06em; }
.brand-mark { width: 34px; height: 34px; border-radius: 50%; background: var(--sakura-soft); display: grid; place-items: center; overflow: hidden; }
.brand-mark img { width: 34px; height: 34px; object-fit: cover; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.nav a { text-decoration: none; color: var(--ink-soft); font-family: var(--font-label); font-size: .88rem; padding: 6px 10px; border-radius: 999px; }
.nav a:hover { background: var(--paper-2); color: var(--ink); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 999px; padding: 6px 14px; font-family: var(--font-label); font-size: .9rem; cursor: pointer; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; padding: 8px 20px 16px; }
  .nav.is-open { display: flex; }
  .nav a { padding: 10px 6px; font-size: 1rem; }
}

/* Hero */
.hero { position: relative; padding-block: 48px 24px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 32px; align-items: center; }
.eyebrow { font-family: var(--font-label); color: var(--leaf); font-size: .85rem; letter-spacing: .18em; font-weight: 700; }
.hero h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); letter-spacing: .08em; margin-top: 10px; font-weight: 900; }
.hero .thesis { font-family: var(--font-display); font-size: clamp(1.15rem, 2.4vw, 1.5rem); color: var(--leaf-deep); margin-top: 14px; font-weight: 700; }
.hero .where { margin-top: 18px; display: inline-flex; align-items: center; gap: 8px; background: var(--card); border: 1px solid var(--line); padding: 8px 16px; border-radius: 999px; font-size: .95rem; }
.hero .where::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--sakura); }
.hero .lead { margin-top: 20px; color: var(--ink-soft); max-width: 34em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.btn { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-family: var(--font-label); font-weight: 700; padding: 12px 22px; border-radius: 999px; font-size: .98rem; transition: transform .2s ease, background .2s ease; }
.btn-primary { background: var(--leaf); color: var(--paper); }
.btn-primary:hover { background: var(--leaf-deep); transform: translateY(-2px); }
.btn-ghost { border: 1.5px solid var(--leaf); color: var(--leaf-deep); }
.btn-ghost:hover { background: var(--paper-2); }

.hero-art { position: relative; aspect-ratio: 1448 / 1086; max-width: 100%; border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); }
.hero-art img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-art .layer-cat { animation: bob 5s ease-in-out infinite; }
.hero-art .speech {
  position: absolute; left: 6%; top: 8%; background: rgba(255,255,255,.92); color: #2f3a2b;
  font-family: var(--font-display); font-weight: 700; font-size: clamp(.8rem, 1.6vw, 1rem);
  padding: 10px 16px; border-radius: 18px 18px 18px 4px; box-shadow: 0 6px 18px rgba(0,0,0,.08);
}
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-1.5%); } }

@media (max-width: 860px) {
  .hero { padding-block: 28px 16px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
}

/* Sections */
.section { padding-block: 72px; }
.section.alt { background: var(--paper-2); }
.sec-head { display: grid; gap: 10px; margin-bottom: 36px; max-width: 40em; }
.sec-head .eyebrow { display: flex; align-items: center; gap: 10px; }
.sec-head .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--sakura); border-radius: 2px; }
.sec-head h2 { font-size: clamp(1.6rem, 3.6vw, 2.3rem); font-weight: 900; letter-spacing: .04em; }
.sec-head p { color: var(--ink-soft); }

/* Philosophy */
.motto { font-family: var(--font-display); font-size: clamp(1.3rem, 3vw, 1.9rem); font-weight: 700; color: var(--leaf-deep); line-height: 1.7; margin-bottom: 28px; }
.principles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.principle { background: var(--card); border-radius: 20px; padding: 22px 20px; border: 1px solid var(--line); min-width: 0; }
.principle .paw { width: 34px; height: 34px; border-radius: 50%; background: var(--sakura-soft); display: grid; place-items: center; margin-bottom: 12px; }
.principle .paw svg { width: 18px; height: 18px; fill: var(--sakura); }
.principle h3 { font-size: 1.12rem; margin-bottom: 6px; }
.principle p { font-size: .95rem; color: var(--ink-soft); line-height: 1.8; }
@media (max-width: 960px) { .principles { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .principles { grid-template-columns: 1fr; } }

/* Feature with image */
.feature { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.feature.reverse { grid-template-columns: 1fr 1.2fr; }
.feature.reverse .feature-media { order: 2; }
.feature-media { min-width: 0; }
.feature-media figure { margin: 0; }
.feature-media img { border-radius: 24px; box-shadow: var(--shadow); width: 100%; }
.feature-media figcaption { font-size: .8rem; color: var(--ink-soft); margin-top: 10px; line-height: 1.6; }
.feature-body { min-width: 0; display: grid; gap: 16px; }
.feature-body h3 { font-size: 1.3rem; }
@media (max-width: 860px) {
  .feature, .feature.reverse { grid-template-columns: 1fr; gap: 24px; }
  .feature.reverse .feature-media { order: 0; }
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: .9rem; font-family: var(--font-label); }
.chip small { color: var(--ink-soft); margin-left: 4px; font-size: .78rem; }
.note { font-size: .85rem; color: var(--ink-soft); }

.rule-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.rule-list li { display: grid; grid-template-columns: 28px 1fr; gap: 12px; align-items: start; }
.rule-list li::before { content: ""; width: 12px; height: 12px; margin-top: .6em; margin-left: 8px; border-radius: 50%; background: var(--leaf); box-shadow: 0 0 0 5px color-mix(in srgb, var(--leaf) 18%, transparent); }
.rule-list strong { font-family: var(--font-display); }

/* Do */
.do-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.do-card { padding: 26px 24px; border-top: 3px solid var(--leaf); background: var(--card); border-radius: 0 0 18px 18px; min-width: 0; }
.do-card .kana { font-family: var(--font-display); font-weight: 900; font-size: 2rem; color: var(--sakura); line-height: 1; }
.do-card h3 { margin: 10px 0 8px; font-size: 1.15rem; }
.do-card p { color: var(--ink-soft); font-size: .95rem; }
@media (max-width: 860px) { .do-grid { grid-template-columns: 1fr; } }

/* Roadmap */
.road { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; position: relative; }
.road::before { content: ""; position: absolute; top: 27px; left: 8%; right: 8%; height: 4px; border-radius: 4px; background: repeating-linear-gradient(90deg, var(--line) 0 18px, transparent 18px 28px); }
.step { position: relative; padding: 0 14px; text-align: left; min-width: 0; }
.step .dot { width: 58px; height: 58px; border-radius: 50%; display: grid; place-items: center; font-family: var(--font-display); font-weight: 900; font-size: 1.3rem; background: var(--card); border: 3px solid var(--line); color: var(--ink-soft); position: relative; z-index: 1; }
.step.now .dot { background: var(--leaf); border-color: var(--leaf); color: var(--paper); }
.step .status { display: inline-block; margin-top: 14px; font-size: .78rem; font-family: var(--font-label); font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--paper-2); color: var(--ink-soft); }
.step.now .status { background: var(--sakura-soft); color: var(--sakura); }
.section.alt .step .status { background: var(--card); }
.step h3 { font-size: 1.15rem; margin-top: 8px; }
.step p { font-size: .94rem; color: var(--ink-soft); margin-top: 6px; }
@media (max-width: 760px) {
  .road { grid-template-columns: 1fr; gap: 28px; }
  .road::before { top: 10px; bottom: 10px; left: 27px; right: auto; width: 4px; height: auto; background: repeating-linear-gradient(180deg, var(--line) 0 18px, transparent 18px 28px); }
  .step { display: grid; grid-template-columns: 58px 1fr; column-gap: 16px; padding: 0; }
  .step .dot { grid-row: 1 / span 4; }
  .step .status { margin-top: 0; justify-self: start; }
}

/* Tsumire */
.tsumire { position: relative; overflow: hidden; }
.tsumire-deco { position: absolute; right: -10%; top: -10%; width: 60%; opacity: .35; pointer-events: none; }
.tsumire .feature { position: relative; }
.tsumire-art { max-width: 520px; margin-inline: auto; filter: drop-shadow(0 14px 24px rgba(67,90,51,.18)); }
.profile { display: grid; grid-template-columns: auto 1fr; gap: 6px 18px; font-size: .95rem; margin: 0; }
.profile dt { font-family: var(--font-label); font-weight: 700; color: var(--leaf); }
.profile dd { margin: 0; }
.bubble { background: var(--card); border: 1px solid var(--line); border-radius: 22px 22px 22px 6px; padding: 16px 20px; font-family: var(--font-display); font-weight: 700; color: var(--leaf-deep); }

/* Support */
.support-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.sns { display: grid; gap: 6px; padding: 22px 20px; border-radius: 20px; background: var(--card); border: 1px solid var(--line); text-decoration: none; color: var(--ink); min-width: 0; transition: transform .2s ease, border-color .2s ease; }
a.sns:hover { transform: translateY(-3px); border-color: var(--leaf); }
.sns .name { font-family: var(--font-label); font-size: .82rem; letter-spacing: .12em; color: var(--ink-soft); font-weight: 700; }
.sns .handle { font-family: var(--font-display); font-weight: 700; font-size: 1.08rem; overflow-wrap: anywhere; }
.sns .desc { font-size: .88rem; color: var(--ink-soft); line-height: 1.7; }
.sns.soon { border-style: dashed; }
.sns.soon .handle { color: var(--ink-soft); }
@media (max-width: 960px) { .support-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .support-grid { grid-template-columns: 1fr; } }
.support-lead { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; margin-bottom: 28px; }
.support-lead img { width: 180px; }
.steps3 { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.steps3 span { font-family: var(--font-display); font-weight: 700; background: var(--sakura-soft); color: var(--sakura); padding: 6px 16px; border-radius: 999px; }
@media (max-width: 600px) { .support-lead { grid-template-columns: 1fr; } .support-lead img { width: 140px; justify-self: center; } }

/* FAQ */
.faq { display: grid; gap: 12px; max-width: 820px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 4px 20px; }
.faq summary { cursor: pointer; list-style: none; font-family: var(--font-display); font-weight: 700; padding: 14px 28px 14px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 1.3rem; color: var(--leaf); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 16px; color: var(--ink-soft); font-size: .95rem; }

/* Footer */
.site-footer { padding-block: 40px; border-top: 1px solid var(--line); font-size: .85rem; color: var(--ink-soft); }
.footer-inner { display: grid; gap: 10px; }
.footer-inner .brand-line { font-family: var(--font-display); font-weight: 700; color: var(--ink); font-size: 1rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-art .layer-cat { animation: none; }
  .btn, a.sns { transition: none; }
}
.feature-media img.cutout { box-shadow: none; border-radius: 0; }
.hero .where { border-radius: 18px; }