/* TTAIC サイトの見た目。色はアニメーション設計（地 #F7F2E7・文字 #1F3A2F・AI #B42318・COACH #5A675D）。
   背景は「奥の園」の昼（ライト）・夜（ダーク）を CSS のグラデーションで（画像は読まない＝速さ）。Web フォントは読まない。 */
:root {
  --bg: #F7F2E7;
  --bg-alt: #EFE8D8;
  --surface: #FFFDF8;
  --ink: #1F3A2F;
  --ink-2: #44554A;
  --muted: #5A675D;
  --line: #DDD3BE;
  --accent: #B42318;
  --accent-ink: #FFFDF8;
  --brand: #27473A;
  --gold: #C8963E;
  --wm-ink: #1F3A2F;
  --wm-ai: #B42318;
  --wm-coach: #5A675D;
  --shadow: 0 1px 2px rgba(31, 58, 47, .06), 0 6px 20px rgba(31, 58, 47, .06);
  --sky: radial-gradient(1200px 500px at 85% -10%, rgba(200, 150, 62, .16), transparent 60%),
         radial-gradient(900px 420px at -10% 10%, rgba(39, 71, 58, .10), transparent 60%);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14231C;
    --bg-alt: #182A21;
    --surface: #1D3128;
    --ink: #F3EEE2;
    --ink-2: #D4DCD2;
    --muted: #B8C6B8;
    --line: #2E4639;
    --accent: #E5484D;
    --accent-ink: #14231C;
    --brand: #B8C6B8;
    --wm-ink: #FFFDF8;
    --wm-ai: #E5484D;
    --wm-coach: #B8C6B8;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    /* 夜の奥の園: 深い緑とホタルの小さな光 */
    --sky: radial-gradient(2px 2px at 12% 30%, rgba(230, 220, 120, .55), transparent 60%),
           radial-gradient(2px 2px at 78% 18%, rgba(230, 220, 120, .45), transparent 60%),
           radial-gradient(3px 3px at 62% 42%, rgba(230, 220, 120, .35), transparent 60%),
           radial-gradient(2px 2px at 30% 64%, rgba(230, 220, 120, .35), transparent 60%),
           radial-gradient(1100px 500px at 80% -10%, rgba(80, 130, 100, .22), transparent 60%);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14231C; --bg-alt: #182A21; --surface: #1D3128; --ink: #F3EEE2; --ink-2: #D4DCD2; --muted: #B8C6B8;
  --line: #2E4639; --accent: #E5484D; --accent-ink: #14231C; --brand: #B8C6B8;
  --wm-ink: #FFFDF8; --wm-ai: #E5484D; --wm-coach: #B8C6B8; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  overflow-wrap: anywhere;
}
:lang(en) body, html[lang="en"] body { line-height: 1.65; }
a { color: var(--brand); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
img, svg { max-width: 100%; }
h1, h2, h3 { line-height: 1.35; letter-spacing: .01em; }
h1 { font-size: clamp(1.75rem, 6.4vw, 2.9rem); margin: .2em 0 .5em; }
h2 { font-size: clamp(1.3rem, 4.6vw, 1.8rem); margin: 0 0 .7em; }
h3 { font-size: 1.1rem; margin: .2em 0 .4em; }
p { margin: 0 0 1em; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* ヘッダー */
.site-header { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 92%, transparent); position: sticky; top: 0; z-index: 5; backdrop-filter: blur(6px); }
.hdr { display: flex; align-items: center; gap: 10px; min-height: 56px; }
.brand { display: block; flex: 0 1 260px; min-width: 0; line-height: 0; }
.wm { width: 100%; height: auto; display: block; }
.wm-ink { fill: var(--wm-ink); } .wm-ai { fill: var(--wm-ai); } .wm-coach { fill: var(--wm-coach); }
.badge-soon { font-size: .72rem; font-weight: 700; color: var(--accent-ink); background: var(--accent); border-radius: 999px; padding: 2px 9px; white-space: nowrap; }
.hdr-nav { margin-left: auto; display: flex; gap: 14px; font-size: .9rem; white-space: nowrap; }
.hdr-nav a { text-decoration: none; color: var(--ink-2); }
@media (max-width: 480px) { .brand { flex-basis: 170px; } .hdr-nav { gap: 10px; font-size: .82rem; } }

/* ヒーロー */
.hero { background: var(--sky), var(--bg); padding: 48px 0 40px; }
.kicker { color: var(--muted); font-weight: 700; font-size: .9rem; margin: 0; }
.hero .lead { font-size: 1.08rem; color: var(--ink-2); max-width: 40em; }
.note { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: .88rem; margin-top: 16px; }
.note svg, .callout svg { width: 20px; height: 20px; flex: 0 0 auto; }

/* ボタン */
.btn { display: inline-block; border: 0; border-radius: 999px; padding: 12px 24px; font-weight: 700; font-size: 1rem; text-decoration: none; cursor: pointer; font-family: inherit; }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow); }
.btn-primary:hover { color: var(--accent-ink); filter: brightness(1.06); }
.btn-lg { padding: 15px 30px; font-size: 1.05rem; }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

/* 節 */
.sec { padding: 52px 0; }
.sec.alt { background: var(--bg-alt); }
.sec-lead { color: var(--ink-2); }
.pain h2 { font-size: clamp(1.2rem, 4.4vw, 1.6rem); }

/* アイコン（細い線・角丸・currentColor） */
.ico { width: 48px; height: 48px; color: var(--brand); }
.ico svg, .note svg, .callout svg { fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); }
.card p { color: var(--ink-2); }
.card-plain { box-shadow: none; }

.steps { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); counter-reset: s; }
.step { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.step .num { position: absolute; top: 14px; right: 16px; font-weight: 800; color: var(--muted); font-size: 1.4rem; }
.callout { display: flex; gap: 10px; align-items: flex-start; background: var(--surface); border-left: 4px solid var(--accent); border-radius: 8px; padding: 14px 16px; }
.callout svg { color: var(--accent); margin-top: 4px; }
.more { margin-top: 8px; }

.two { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin: 16px 0; }
.box { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; }
.box ul { margin: 0; padding-left: 1.2em; }
.box-muted { background: transparent; border-style: dashed; }

/* メール登録 */
.notify-sec { background: var(--sky), var(--bg); }
.notify { display: grid; gap: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); }
.fld { display: grid; gap: 4px; font-weight: 700; font-size: .92rem; }
.fld input, .fld select { font: inherit; font-weight: 400; padding: 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); width: 100%; }
.chk { display: flex; gap: 10px; align-items: flex-start; font-size: .92rem; }
.chk input { width: 20px; height: 20px; margin-top: 4px; flex: 0 0 auto; accent-color: var(--accent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-msg { margin: 0; min-height: 1.5em; font-weight: 700; }
.form-msg.ok { color: var(--brand); } .form-msg.err { color: var(--accent); }
.notify.done .fld, .notify.done .chk, .notify.done button { display: none; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 700; list-style: none; position: relative; padding-right: 28px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: -2px; font-size: 1.3rem; color: var(--muted); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 10px 0 0; color: var(--ink-2); }

.maker { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.maker dt { font-weight: 700; color: var(--muted); }
.maker dd { margin: 0; }

.guide-list { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.guide-list a { display: block; height: 100%; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; text-decoration: none; color: var(--ink); }
.guide-list a:hover { border-color: var(--brand); }
.guide-list strong { display: block; margin-bottom: 4px; }
.guide-list span { display: block; color: var(--ink-2); font-size: .9rem; }

/* ガイド */
.guide { padding: 28px 0 48px; }
.guide h2 { margin-top: 2em; }
.crumbs { font-size: .85rem; color: var(--muted); }
.crumbs a { color: var(--muted); }
.lead { font-size: 1.06rem; color: var(--ink-2); }
.small { font-size: .86rem; } .muted { color: var(--muted); }
.points { padding-left: 1.3em; }
.points li { margin-bottom: 10px; }
.points strong { display: block; }
.points span { color: var(--ink-2); }
.faults { display: grid; gap: 12px; }
.fault { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.fault p { margin: 0 0 6px; }
.fault b { display: block; color: var(--muted); font-size: .78rem; letter-spacing: .04em; }
.fault .sym { font-weight: 700; }
.drill { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; margin-bottom: 12px; }
.drill ol { margin: 0; padding-left: 1.3em; }
.cta-box { margin: 36px 0; background: var(--sky), var(--bg-alt); border: 1px solid var(--line); border-radius: 16px; padding: 22px; }
.cta-box h2 { margin-top: 0; }
.related ul { padding-left: 1.2em; }
.legal h2 { font-size: 1.15rem; margin-top: 1.8em; }

.stores { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0; }
.store { display: inline-block; background: #111; color: #fff; border-radius: 10px; padding: 10px 16px; font-weight: 700; text-decoration: none; }
.store-soon { background: transparent; color: var(--muted); border: 1px dashed var(--line); }
.price { width: 100%; border-collapse: collapse; margin: 12px 0; background: var(--surface); }
.price caption { text-align: left; font-weight: 700; padding-bottom: 6px; }
.price th, .price td { border: 1px solid var(--line); padding: 10px; text-align: left; vertical-align: top; }
.preview-bar { margin: 0; background: var(--gold); color: #1F3A2F; text-align: center; font-weight: 800; font-size: .8rem; letter-spacing: .1em; }

/* フッター */
.site-footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: .88rem; color: var(--muted); }
.ftr-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-bottom: 12px; }
.ftr-nav a { color: var(--muted); }
.copy { margin: 0; }