/* 写経 (Shakyo) LP — 古紙 + 墨 + 朱 (静謐・和・伝統)。明朝・light 固定 */

:root{
  --ivory:  #faf7f2;   /* 古紙 bg */
  --paper:  #ffffff;
  --sumi:   #2b2419;   /* 墨 text */
  --shu:    #8b3a3a;   /* 朱 accent (印章) */
  --muted:  #776a57;   /* 4.9:1 on ivory — WCAG AA for captions/secondary text */
  --label:  #6f6352;   /* 5.5:1 on ivory — WCAG AA for section markers */
  --sep:    #e6dfd2;

  --line:        rgba(43,36,25,.10);
  --line-strong: rgba(43,36,25,.18);

  --mincho:"Shippori Mincho","Noto Serif JP","Hiragino Mincho ProN","YuMincho","Yu Mincho",serif;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--ivory);color:var(--sumi);font-family:var(--mincho);font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{min-height:100vh;overflow-x:hidden}

a{color:var(--shu);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:rgba(139,58,58,.30);transition:color .15s,text-decoration-color .15s}
a:hover{text-decoration-color:currentColor}
.muted{color:var(--muted)}

h1,h2,h3{font-family:var(--mincho);font-weight:600;margin:0;color:var(--sumi);letter-spacing:.01em}
h1{font-size:clamp(34px,5.4vw,60px);line-height:1.32;font-weight:600}
h2{font-size:clamp(23px,3vw,34px);line-height:1.5;margin:0 0 16px}
h3{font-size:19px;line-height:1.6;margin:0 0 10px}

/* topbar (最小) */
.topbar{position:sticky;top:0;z-index:50;background:rgba(250,247,242,.92);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:1000px;margin:0 auto;padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-family:var(--mincho);font-size:21px;font-weight:600;color:var(--sumi);text-decoration:none;letter-spacing:.18em;padding-left:.18em}
.topbar-cta a{color:var(--shu);text-decoration:none;font-size:14px;border:1px solid var(--sep);border-radius:8px;padding:8px 16px;transition:border-color .15s,background .15s}
.topbar-cta a:hover{border-color:var(--shu);background:var(--paper)}

/* containers */
.wrap{max-width:1000px;margin:0 auto;padding:0 24px}
main section{padding:88px 0;border-bottom:1px solid var(--line)}
main section:last-of-type{border-bottom:0}
.section-marker{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--label);font-weight:500;margin-bottom:14px}

/* HERO — 余白主体・装飾なし */
.hero{padding:104px 0 92px;background:var(--ivory)}
.hero-icon{display:block;width:92px;height:92px;border-radius:20px;margin:0 0 32px;box-shadow:0 6px 22px -10px rgba(43,36,25,.30)}
.hero h1{margin-bottom:26px;color:var(--sumi)}
.hero-sub{font-size:clamp(16px,1.8vw,20px);color:var(--sumi);max-width:620px;margin:0 0 36px;line-height:1.9}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin:24px 0 0}
.cta{display:inline-flex;align-items:center;gap:10px;background:var(--shu);color:var(--paper);padding:14px 30px;border-radius:10px;text-decoration:none;font-weight:600;font-size:15px;letter-spacing:.04em;transition:transform .15s,background .15s,box-shadow .15s;border:0;box-shadow:0 6px 18px -10px rgba(139,58,58,.50)}
.cta:hover{background:#763030;transform:translateY(-2px);text-decoration:none}
.cta-secondary{background:transparent;color:var(--shu);border:1px solid var(--shu);box-shadow:none}
.cta-secondary:hover{background:var(--paper);color:var(--shu)}

/* lead (一言) */
.lead{font-size:clamp(17px,2vw,21px);line-height:2;color:var(--sumi);max-width:680px}

/* feature cards */
.features-grid{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:640px){.features-grid{grid-template-columns:repeat(2,1fr)}}
.feat-card{background:var(--paper);border:1px solid var(--sep);border-radius:14px;padding:30px;transition:transform .2s,box-shadow .2s}
.feat-card:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(43,36,25,.06)}
.feat-card h3{font-size:20px;color:var(--sumi);margin:0 0 12px}
.feat-card h3 rt{font-size:11px;color:var(--label);font-weight:400;letter-spacing:.02em;font-feature-settings:"palt"}
.feat-card p{margin:0;color:var(--sumi);font-size:15px;line-height:1.9}

/* showcase (実機スクショ 2 枚) */
.showcase-grid{display:grid;gap:40px;grid-template-columns:1fr;align-items:start;justify-items:center}
@media(min-width:768px){.showcase-grid{grid-template-columns:repeat(2,1fr)}}
.shot{text-align:center;max-width:300px}
.shot img{width:100%;height:auto;display:block;border-radius:26px;border:1px solid var(--sep);box-shadow:0 14px 40px -16px rgba(43,36,25,.30)}
.shot figcaption{margin:18px 0 0;color:var(--muted);font-size:14px;line-height:1.7}

/* persona list */
.persona-list{display:grid;gap:14px;grid-template-columns:1fr;margin:0;padding:0;list-style:none}
@media(min-width:640px){.persona-list{grid-template-columns:repeat(2,1fr)}}
.persona-list li{background:var(--paper);border:1px solid var(--sep);border-radius:12px;padding:20px 24px;font-size:15px;line-height:1.8}
.persona-list strong{display:block;color:var(--shu);margin-bottom:4px;font-weight:600}

/* sutra-about (般若心経について) */
.about-sutra p{font-size:16px;line-height:2;color:var(--sumi);max-width:720px}
.about-sutra .quote{color:var(--shu);font-style:normal}

/* spec dl */
.specs{display:grid;gap:14px;grid-template-columns:1fr;margin:0}
@media(min-width:640px){.specs{grid-template-columns:repeat(2,1fr)}}
.spec{margin:0;padding:18px 22px;background:var(--paper);border:1px solid var(--sep);border-radius:12px}
.spec dt{font-size:12px;color:var(--muted);letter-spacing:.08em;margin-bottom:6px}
.spec dd{margin:0;font-size:16px;color:var(--sumi);font-weight:600}

/* download band */
.download-band{text-align:center}
.download-band .cta-row{justify-content:center}

/* faq */
.faq details{background:var(--paper);border:1px solid var(--sep);border-radius:12px;padding:18px 24px;margin:0 0 12px;transition:border-color .15s}
.faq details[open]{border-color:var(--shu)}
.faq summary{cursor:pointer;font-weight:600;color:var(--sumi);font-size:16px;list-style:none;position:relative;padding-right:28px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:0;color:var(--shu);font-weight:600;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:14px 0 0;color:var(--sumi);font-size:15px;line-height:1.9}

/* footer */
footer{padding:52px 24px 68px;border-top:1px solid var(--line);background:var(--ivory);text-align:center}
footer nav{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;margin-bottom:16px}
footer nav a{color:var(--sumi);text-decoration:none;font-size:14px}
footer nav a:hover{color:var(--shu);text-decoration:underline}
.footer-notes{max-width:680px;margin:0 auto 12px;color:var(--muted);font-size:13px;line-height:1.8;text-align:left}
.copy{color:var(--muted);font-size:13px;margin-top:8px;letter-spacing:.04em}

/* reduced motion */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* article (privacy/terms/support) */
.article{padding:80px 24px 64px;max-width:740px;margin:0 auto}
.article h1{font-size:clamp(26px,4vw,38px);margin-bottom:8px}
.article .meta{color:var(--muted);font-size:13px;margin-bottom:32px}
.article h2{font-size:21px;margin-top:36px;margin-bottom:12px;color:var(--sumi)}
.article p,.article ul{font-size:16px;line-height:1.9;color:var(--sumi)}
.article ul{padding-left:1.4em;margin:8px 0}
.article a{color:var(--shu)}