/* Guides stylesheet. Tokens, nav, buttons and footer are copied from index.html; keep them in sync when the homepage tokens change. */
html{color-scheme:light;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}
:root{
  --bg:#F3F0E9; --surface:#FFFFFF; --ink:#23304A; --ink-2:#5C6478; --muted:#666C7A;
  --indigo:#2E4374; --fur:#B5743D; --sakura:#F2A6C2; --gold:#E5A92E; --shu:#C0392B; --moss:#2E8B57;
  --border:#E2DDD0; --divider:#EBE6D8; --on-accent:#FFFFFF; --band:#2E4374; --band-ink:#F3F0E9; --band-ink-2:#C9D1E6;
  --kanji:#C0392B; --vocab:#2E8B57; --grammar:#2E4374; --reading:#B07C2B; --listening:#2C8C9E;
  --grid:rgba(46,139,87,.16); --shelf:#8A5A2E; --spine-empty:#E7E1D3; --shadow:0 1px 2px rgba(35,48,74,.06),0 8px 24px rgba(35,48,74,.08);
  --f-display:"Zen Maru Gothic","Hiragino Maru Gothic ProN","Yu Gothic",system-ui,sans-serif;
  --f-body:"Figtree",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mincho:"Shippori Mincho","Hiragino Mincho ProN","Yu Mincho",serif;
  --wrap:1120px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#211E1A; --surface:#2C2925; --ink:#E8E2D6; --ink-2:#A79F92; --muted:#9C9385;
  --indigo:#7D96D6; --fur:#CE9159; --sakura:#D98BA8; --gold:#D9A94A; --shu:#E06A5C; --moss:#5FAF85;
  --border:#3B372F; --divider:#332F29; --on-accent:#211E1A; --band:#1A2238; --band-ink:#E8E2D6; --band-ink-2:#A9B4D2;
  --kanji:#E06A5C; --vocab:#5FAF85; --grammar:#7D96D6; --reading:#CE9F5A; --listening:#58B4C4;
  --grid:rgba(95,175,133,.18); --shelf:#6B4826; --spine-empty:#3B372F; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#211E1A; --surface:#2C2925; --ink:#E8E2D6; --ink-2:#A79F92; --muted:#9C9385;
  --indigo:#7D96D6; --fur:#CE9159; --sakura:#D98BA8; --gold:#D9A94A; --shu:#E06A5C; --moss:#5FAF85;
  --border:#3B372F; --divider:#332F29; --on-accent:#211E1A; --band:#1A2238; --band-ink:#E8E2D6; --band-ink-2:#A9B4D2;
  --kanji:#E06A5C; --vocab:#5FAF85; --grammar:#7D96D6; --reading:#CE9F5A; --listening:#58B4C4;
  --grid:rgba(95,175,133,.18); --shelf:#6B4826; --spine-empty:#3B372F; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--bg)}
a{color:inherit}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:8px}
h1,h2,h3{font-family:var(--f-display);font-weight:900;line-height:1.15;text-wrap:balance;margin:0;letter-spacing:-.01em}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.eyebrow{font-family:var(--f-display);font-weight:700;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;color:var(--fur);display:flex;gap:.6em;align-items:center}
.eyebrow .jp{letter-spacing:.05em;text-transform:none}
.lede{font-size:1.15rem;color:var(--ink-2);max-width:36em}

/* nav */
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--divider)}
.nav .wrap{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--f-display);font-weight:900;font-size:1.2rem}
.brand img{width:36px;height:36px;border-radius:9px;box-shadow:0 0 0 1px var(--border)}
.brand small{font-weight:500;color:var(--ink-2);font-size:.85rem}
.nav-links{display:flex;gap:22px;margin-left:auto;font-weight:600;font-size:.95rem}
.nav-links a{text-decoration:none;color:var(--ink-2)}
.nav-links a:hover{color:var(--ink)}
@media (max-width:820px){.nav-links{display:none}.nav .btn-store{margin-left:auto}}
@media (max-width:420px){.brand small{display:none}}

/* buttons */
.btn-store{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:var(--bg);text-decoration:none;border-radius:12px;padding:10px 18px 10px 14px;font-weight:600;line-height:1.15;transition:transform .15s ease,box-shadow .15s ease}
.btn-store:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-store svg{width:22px;height:22px;flex:none}
.btn-store span{display:flex;flex-direction:column;font-size:1.02rem}
.btn-store span small{font-size:.68rem;font-weight:500;opacity:.8;letter-spacing:.02em}
.nav .btn-store{padding:7px 14px 7px 11px}
.nav .btn-store span{font-size:.9rem}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:12px;border:1.5px solid var(--border);text-decoration:none;font-weight:600;color:var(--ink);background:var(--surface)}
.btn-ghost:hover{border-color:var(--indigo)}
.fine{font-size:.88rem;color:var(--muted)}
footer{padding-block:48px;font-size:.88rem;color:var(--ink-2)}
footer .wrap{display:flex;flex-direction:column;gap:22px}
.foot-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;align-items:center}
.foot-links{display:flex;flex-wrap:wrap;gap:20px;font-weight:600}
.foot-links a{text-decoration:none}
.foot-links a:hover{text-decoration:underline}
.legal{font-size:.8rem;color:var(--muted);max-width:80ch;display:flex;flex-direction:column;gap:8px}

/* article */
.crumbs{font-size:.88rem;color:var(--muted);padding-top:36px}
.crumbs a{color:var(--ink-2);text-decoration:none}
.crumbs a:hover{text-decoration:underline}
.article{max-width:720px;margin:0 auto;padding-block:20px 80px}
.article header{display:flex;flex-direction:column;gap:16px;padding-bottom:28px;border-bottom:1px solid var(--divider);margin-bottom:36px}
.article h1{font-size:clamp(2rem,4.6vw,3rem)}
.article .meta{font-size:.88rem;color:var(--muted)}
.prose{display:flex;flex-direction:column;gap:18px;font-size:1.06rem}
.prose h2{font-size:clamp(1.45rem,3vw,1.85rem);margin-top:28px}
.prose h3{font-size:1.18rem;margin-top:10px}
.prose ul,.prose ol{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:8px}
.prose li::marker{color:var(--fur)}
.prose a{color:var(--indigo);text-underline-offset:3px}
.prose a.btn-store{color:var(--bg);text-decoration:none}
.prose strong{color:var(--ink)}
.prose p,.prose li{color:color-mix(in srgb,var(--ink) 86%,var(--bg))}
.prose .jp,.prose [lang="ja"]{font-family:var(--f-display)}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:14px;background:var(--surface)}
.prose table{border-collapse:collapse;width:100%;font-size:.95rem;min-width:520px}
.prose th,.prose td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--divider);vertical-align:top}
.prose th{font-family:var(--f-display);font-weight:700;background:color-mix(in srgb,var(--bg) 60%,var(--surface))}
.prose tr:last-child td{border-bottom:0}
.note{font-size:.9rem;color:var(--muted)}
.callout{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--c,var(--fur));border-radius:12px;padding:16px 18px}

/* in-article download prompt */
.cta-card{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:20px;margin-block:14px}
.cta-card > img{width:56px;height:56px;border-radius:13px;box-shadow:0 0 0 1px var(--border)}
.cta-card b{font-family:var(--f-display);font-size:1.08rem;display:block}
.cta-card p{font-size:.95rem;color:var(--ink-2);margin-top:2px}
.cta-card .btn-store{grid-column:1/-1;justify-self:start}
@media (min-width:640px){.cta-card{grid-template-columns:auto 1fr auto}.cta-card .btn-store{grid-column:auto}}

/* vertical text sample */
.tate{writing-mode:vertical-rl;font-family:var(--f-mincho);font-size:1.3rem;line-height:2.2;letter-spacing:.06em;height:300px;padding:20px;margin-left:auto;background-color:var(--surface);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:36px 36px;border:1px solid var(--border);border-radius:14px;overflow-x:auto;max-width:100%}
.tate rt{font-size:.5em;color:var(--fur)}
.tcy{text-combine-upright:all}

/* guide lists */
.guide-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;list-style:none;margin:0;padding:0}
.guide-list a{display:flex;flex-direction:column;gap:8px;height:100%;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:22px;text-decoration:none;transition:border-color .15s}
.guide-list a:hover{border-color:var(--indigo)}
.guide-list b{font-family:var(--f-display);font-size:1.15rem;line-height:1.3}
.guide-list span{color:var(--ink-2);font-size:.95rem}
.related{margin-top:48px;padding-top:28px;border-top:1px solid var(--divider);display:flex;flex-direction:column;gap:16px}
.related h2{font-size:1.3rem}
.page-head{padding-block:48px 32px;display:flex;flex-direction:column;gap:14px;max-width:46em}
.page-head h1{font-size:clamp(2.1rem,4.8vw,3.2rem)}

/* faq (support page) */
.faq{display:flex;flex-direction:column;border-top:1px solid var(--border)}
.faq details{border-bottom:1px solid var(--border)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;padding:18px 2px;font-family:var(--f-display);font-weight:700;font-size:1.06rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--fur);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 2px 20px;color:var(--ink-2)}

/* legal pages */
.legal{font-size:1rem}
.legal h2{font-size:1.35rem}
.legal h3{font-size:1.08rem}