/* hidane.dev — tokens and layout. Dark ("sumi + ember") is the default; light ("kinari + charcoal")
   follows prefers-color-scheme or the toggle (data-theme on <html>). */
:root {
  --bg: #141210; --surface: #1B1815; --line: #322D28; --text: #EDE6DC; --muted: #A69D91; --dim: #8C8479;
  --accent: #E2553D; --ember: #E2553D; --mark: #0A0908; --mark-ring: #3A342E;
  --font-sans: "IBM Plex Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --gutter: clamp(20px, 5.5cqi, 80px);
  --measure: 1120px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #F4EFE6; --surface: #FBF8F2; --line: #D9D0C2; --text: #1E1B18; --muted: #5F574E; --dim: #6F675D;
    --accent: #B23A22; --ember: #E2553D; --mark: #1E1B18; --mark-ring: #1E1B18; color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #F4EFE6; --surface: #FBF8F2; --line: #D9D0C2; --text: #1E1B18; --muted: #5F574E; --dim: #6F675D;
  --accent: #B23A22; --ember: #E2553D; --mark: #1E1B18; --mark-ring: #1E1B18; color-scheme: light;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; }
.hd {
  container-type: inline-size; min-height: 100vh; background: var(--bg); color: var(--text);
  font-family: var(--font-sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased;
}
html[lang="ja"] .hd { line-height: 1.75; }
.hd a { color: inherit; text-underline-offset: 3px; }
.hd a:hover { color: var(--accent); }
.hd a:focus-visible, .hd button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.wrap { max-width: var(--measure); margin: 0 auto; }
.mono { font-family: var(--font-mono); }
svg .mark-disc { fill: var(--mark); stroke: var(--mark-ring); }
svg .mark-ember { fill: var(--ember); }
svg .motif-ring { stroke: var(--line); }

/* header */
.hdr { padding: 12px var(--gutter); }
.hdr-in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; text-decoration: none; font-weight: 600; font-size: 19px; letter-spacing: -0.01em; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 0 24px; font-size: 15px; }
.nav a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; color: var(--muted); }
.nav a[aria-current="page"] { color: var(--text); font-weight: 600; }
.lang { display: flex; align-items: center; gap: 8px; }
.lang .sep { color: var(--dim); }
.theme-btn { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; background: transparent; border: 1px solid var(--line); border-radius: 8px; color: var(--muted); cursor: pointer; }
.theme-btn:hover { color: var(--accent); }

/* hero */
.hero { padding: clamp(48px, 7cqi, 96px) var(--gutter) clamp(56px, 6.5cqi, 88px); }
.hero-in { display: flex; align-items: center; gap: 48px; }
.hero-copy { flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; gap: 28px; }
.hero h1 { margin: 0; max-width: 18em; font-size: clamp(30px, 4.7cqi, 54px); line-height: 1.14; font-weight: 600; letter-spacing: -0.02em; text-wrap: balance; }
.lede { margin: 0; max-width: 40em; font-size: clamp(17px, 1.7cqi, 20px); line-height: 1.6; color: var(--muted); text-wrap: pretty; }
html[lang="ja"] .lede { max-width: 36em; font-size: clamp(16px, 1.6cqi, 19px); line-height: 1.8; }
.install { max-width: 800px; display: flex; flex-direction: column; gap: 10px; }
.install-box { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; padding: 14px 14px 14px 20px; background: var(--surface); border: 1px dashed var(--dim); border-radius: 10px; }
.cmd { flex: 1 1 280px; min-width: 0; overflow-wrap: anywhere; font-family: var(--font-mono); font-size: 15px; line-height: 1.5; color: var(--dim); }
.cmd .prompt { user-select: none; }
.badge { display: inline-flex; align-items: center; gap: 8px; min-height: 28px; padding: 0 12px; border: 1px solid var(--accent); border-radius: 999px; font-family: var(--font-mono); font-size: 12px; font-weight: 500; color: var(--accent); white-space: nowrap; }
html[lang="ja"] .badge { font-family: var(--font-sans); }
.copy-btn { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 14px; background: transparent; border: 1px solid var(--line); border-radius: 8px; font: inherit; font-size: 14px; color: var(--dim); cursor: not-allowed; }
.note { margin: 0; font-size: 14px; color: var(--muted); }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.hd a.btn-primary { display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px; background: var(--text); color: var(--bg); border: 1px solid var(--text); border-radius: 8px; font-weight: 500; text-decoration: none; }
.hd a.btn-primary:hover { color: var(--bg); background: var(--accent); border-color: var(--accent); }
.hd a.btn-secondary { display: inline-flex; align-items: center; gap: 8px; min-height: 48px; padding: 0 22px; border: 1px solid var(--dim); border-radius: 8px; font-weight: 500; text-decoration: none; }
.hd a.btn-secondary:hover { color: var(--accent); border-color: var(--accent); }
.status { margin: 0; display: flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
html[lang="ja"] .status { font-family: var(--font-sans); }
.status .dot { flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.motif { flex: 0 0 auto; }
@container (max-width: 760px) { .motif { display: none; } }

/* sections */
.sec { padding: 72px var(--gutter); border-top: 1px solid var(--line); }
.sec-in { display: flex; flex-direction: column; gap: 40px; }
.sec-in--tight { gap: 28px; }
.sec-in--narrow { gap: 24px; }
.h2 { margin: 0; font-size: 28px; line-height: 1.25; font-weight: 600; letter-spacing: -0.01em; }
html[lang="ja"] .h2 { line-height: 1.35; letter-spacing: 0; }
.sec-intro { margin: 0; max-width: 44em; color: var(--muted); }
html[lang="ja"] .sec-intro { max-width: 38em; }
.fine { margin: 0; font-size: 14px; color: var(--muted); }

/* why */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr)); gap: 40px 48px; }
.card { display: flex; flex-direction: column; gap: 12px; padding-top: 20px; border-top: 2px solid var(--text); }
.card-num { font-family: var(--font-mono); font-size: 32px; line-height: 1.1; font-weight: 500; letter-spacing: -0.02em; }
.card h3 { margin: 0; font-size: 18px; line-height: 1.4; font-weight: 600; }
html[lang="ja"] .card h3 { line-height: 1.5; }
.card p { margin: 0; color: var(--muted); text-wrap: pretty; }
.src { display: inline-flex; align-items: center; min-height: 44px; align-self: flex-start; font-size: 14px; }

/* works with */
.legend { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px; font-size: 14px; color: var(--muted); }
.legend-chips { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.chip { display: inline-flex; align-items: center; height: 24px; padding: 0 10px; border: 1px dashed var(--dim); border-radius: 999px; font-family: var(--font-mono); font-size: 12px; font-weight: 500; color: var(--muted); white-space: nowrap; }
.chip--progress { border: 1px solid var(--text); color: var(--text); }
.chip--supported { border: 1px solid var(--text); background: var(--text); color: var(--bg); }
.rows { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr)); gap: 0 64px; border-top: 1px solid var(--line); }
.row { display: flex; align-items: center; gap: 16px; min-height: 52px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.row-ver { flex: 0 0 40px; font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.row-label { flex: 1 1 0; min-width: 0; font-weight: 500; }

/* parity */
.lede-lg { margin: 0; max-width: 44em; font-size: 18px; line-height: 1.65; text-wrap: pretty; }
html[lang="ja"] .lede-lg { max-width: 38em; font-size: 17px; line-height: 1.85; }
.placeholder { margin: 0; padding: 20px 24px; border: 1px dashed var(--dim); border-radius: 10px; font-family: var(--font-mono); font-size: 14px; color: var(--muted); }
html[lang="ja"] .placeholder { font-family: var(--font-sans); }

/* roadmap */
.rm { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr)); gap: 32px 48px; }
.rm li { display: flex; flex-direction: column; gap: 8px; padding-top: 20px; border-top: 1px solid var(--dim); }
.rm-ver { font-family: var(--font-mono); font-size: 24px; font-weight: 500; }
.rm p { margin: 0; color: var(--muted); text-wrap: pretty; }

/* install (planned) */
.channels { border-top: 1px solid var(--line); }
.ch { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; min-height: 56px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.ch-name { flex: 0 0 160px; font-weight: 500; }
.ch-cmd { flex: 1 1 240px; min-width: 0; overflow-wrap: anywhere; font-family: var(--font-mono); font-size: 14px; color: var(--dim); }
.ch-desc { flex: 1 1 240px; min-width: 0; font-size: 14px; color: var(--dim); }

/* footer */
.ftr { padding: 48px var(--gutter) 64px; border-top: 1px solid var(--line); }
.ftr-in { display: flex; flex-direction: column; gap: 20px; }
.ftr nav { display: flex; flex-wrap: wrap; gap: 0 28px; font-size: 15px; }
.ftr nav a { display: inline-flex; align-items: center; min-height: 44px; }
.legal { margin: 0; max-width: 56em; font-size: 14px; color: var(--muted); text-wrap: pretty; }
html[lang="ja"] .legal { max-width: 48em; }

/* 404 */
.nf { min-height: 60vh; display: flex; flex-direction: column; justify-content: center; gap: 16px; padding: 96px var(--gutter); }
.nf h1 { margin: 0; font-size: clamp(28px, 4cqi, 44px); line-height: 1.15; font-weight: 600; letter-spacing: -0.02em; }
.nf p { margin: 0; color: var(--muted); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }