:root {
  --paper: #eef7f0;
  --card: #ffffff;
  --surface: #e1f0e5;
  --ink: #14281b;
  --muted: #4f6556;
  --rule: #cde2d3;
  --strong: #14281b;
  --accent: #1e7e3f;
  --accent-2: #34c759;
  --accent-ink: #ffffff;
  --warn-bg: #fdf0f0;
  --warn-rule: #b03a3a;
  --note-bg: #dff1e3;
  --draft-bg: #fff4cf;
  --draft-ink: #5c4600;
  --font: "Hiragino Sans", "BIZ UDPGothic", "Yu Gothic Medium", "Yu Gothic", "Noto Sans JP", Meiryo, system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #101a13; --card: #17241b; --surface: #1b2c21; --ink: #e6f1e9; --muted: #9db3a3; --rule: #2a3d30; --strong: #e6f1e9;
    --accent: #5fd985; --accent-2: #34c759; --accent-ink: #08170d; --warn-bg: #2a1a1a; --warn-rule: #e08a8a;
    --note-bg: #1b3324; --draft-bg: #3a3000; --draft-ink: #ffe9a3;
  }
}
:root[data-theme="dark"] {
  --paper: #101a13; --card: #17241b; --surface: #1b2c21; --ink: #e6f1e9; --muted: #9db3a3; --rule: #2a3d30; --strong: #e6f1e9;
  --accent: #5fd985; --accent-2: #34c759; --accent-ink: #08170d; --warn-bg: #2a1a1a; --warn-rule: #e08a8a;
  --note-bg: #1b3324; --draft-bg: #3a3000; --draft-ink: #ffe9a3;
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 17px; -webkit-text-size-adjust: 100%; }
body { margin: 0; line-height: 1.95; font-feature-settings: "palt" 0; font-variant-numeric: tabular-nums; }
a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: 0.6rem 1rem; z-index: 10; }
.skip:focus { left: 0; }

.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }

.wrap-wide { max-width: 68rem; }

/* header: compact media bar */
.site-head { border-bottom: 3px solid var(--accent-2); background: var(--card); position: sticky; top: 0; z-index: 5; }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.2rem 1.5rem; padding-top: 0.7rem; padding-bottom: 0.7rem; }
.brand { font-weight: 800; font-size: 1.2rem; letter-spacing: 0.02em; color: var(--ink); text-decoration: none; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; }
.brand-icon { border-radius: 7px; display: block; }
.site-nav { display: flex; gap: 0.2rem 1.3rem; font-size: 0.9rem; overflow-x: auto; white-space: nowrap; max-width: 100%; }
.site-nav a { color: var(--muted); text-decoration: none; padding: 0.35rem 0; border-bottom: 2px solid transparent; }
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

main { padding: 2rem 0 4rem; }

h1, h2, h3 { line-height: 1.45; font-weight: 800; }
h1 { font-size: 1.85rem; margin: 0 0 1rem; letter-spacing: 0.01em; }
h2 { font-size: 1.3rem; margin: 3rem 0 0.8rem; padding-top: 0.9rem; border-top: 1px solid var(--rule); }
h3 { font-size: 1.05rem; margin: 2rem 0 0.4rem; }
p, ul, ol, table, blockquote { margin: 0 0 1.2rem; }
li { margin-bottom: 0.35rem; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

.lede { font-size: 1.12rem; color: var(--ink); }
.meta { color: var(--muted); font-size: 0.85rem; margin: 0 0 1.6rem; }
.crumbs { font-size: 0.85rem; color: var(--muted); margin-bottom: 1.2rem; }
.crumbs a { color: var(--muted); }

/* home */
.hero { padding: 0.5rem 0 1rem; }
.eyebrow { margin: 0 0 0.3rem; color: var(--accent); font-weight: 700; font-size: 0.85rem; letter-spacing: 0.08em; }
.hero h1 { font-size: 2.2rem; margin-bottom: 0.7rem; max-width: 38rem; }
.hero .lede { max-width: 38rem; color: var(--muted); font-size: 1.02rem; }
.quick { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.8rem; margin: 0 0 1.4rem; }
.quick > span { font-size: 0.8rem; font-weight: 700; color: var(--muted); }
.quick ul { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; margin: 0; padding: 0; }
.quick li { margin: 0; }
.quick a { display: inline-block; padding: 0.15rem 0.85rem; border: 1px solid var(--rule); border-radius: 999px; color: var(--ink); text-decoration: none; font-size: 0.88rem; line-height: 1.8; background: var(--card); }
.quick a:hover { border-color: var(--accent); color: var(--accent); }
.tool { display: grid; gap: 0.1rem; padding: 1rem 1.2rem; background: var(--accent); color: var(--accent-ink); border-radius: 6px; text-decoration: none; max-width: 38rem; }
.tool strong { font-size: 1.1rem; }
.tool span { font-size: 0.88rem; opacity: 0.85; line-height: 1.7; }
.tool .tool-label { font-size: 0.75rem; letter-spacing: 0.08em; font-weight: 700; color: #0b2a14; background: var(--accent-2); justify-self: start; padding: 0 0.5rem; border-radius: 2px; opacity: 1; margin-bottom: 0.2rem; }
.tool:hover { filter: brightness(1.15); }

.sec { margin-top: 3rem; scroll-margin-top: 4rem; }
.sec-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.2rem 1rem; border-bottom: 2px solid var(--accent-2); padding-bottom: 0.4rem; margin-bottom: 1.1rem; }
.sec-head h2 { margin: 0; padding: 0; border: 0; font-size: 1.3rem; }
.sec-head .en { margin-left: 0.7rem; font-size: 0.75rem; font-weight: 700; color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase; }
.sec-head p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.cards { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 1rem; }
.card { margin: 0; }
.card a { display: flex; flex-direction: column; gap: 0.35rem; height: 100%; padding: 1rem 1.1rem; border: 1px solid var(--rule); border-radius: 10px; background: var(--card); color: var(--ink); text-decoration: none; transition: border-color .15s, box-shadow .15s; }
.card a:hover { border-color: var(--accent); box-shadow: 0 2px 10px rgba(0,0,0,.06); }
.card .tag { align-self: flex-start; font-size: 0.74rem; font-weight: 700; color: var(--accent); background: var(--note-bg); padding: 0 0.5rem; border-radius: 2px; line-height: 1.7; }
.card-title { font-weight: 800; line-height: 1.55; }
.card a:hover .card-title { color: var(--accent); }
.card .desc { color: var(--muted); font-size: 0.86rem; line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card time { margin-top: auto; padding-top: 0.3rem; color: var(--muted); font-size: 0.78rem; }
.empty { border: 1px dashed var(--rule); border-radius: 6px; padding: 1rem 1.2rem; color: var(--muted); font-size: 0.9rem; background: var(--card); margin: 0; }

.promise { margin-top: 3.5rem; padding: 1.4rem 1.5rem; background: var(--surface); border-radius: 10px; }
.promise ul { list-style: none; padding: 0; margin: 0 0 0.8rem; display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1rem 1.5rem; }
.promise li { margin: 0; font-size: 0.88rem; line-height: 1.7; color: var(--muted); }
.promise strong { display: block; color: var(--ink); font-size: 0.95rem; margin-bottom: 0.1rem; }
.promise p { margin: 0; font-size: 0.88rem; }

.profile { display: flex; gap: 1rem; align-items: flex-start; background: var(--card); border: 1px solid var(--rule); border-radius: 10px; padding: 1.1rem 1.3rem; max-width: 44rem; }
.profile img { border-radius: 12px; flex: none; }
.profile strong { display: block; }
.profile p { margin: 0.2rem 0 0.4rem; font-size: 0.92rem; line-height: 1.8; color: var(--muted); }
.profile a { font-size: 0.9rem; font-weight: 700; }
.profile.compact { margin-top: 2.5rem; max-width: none; }

.ad-slot { position: relative; margin: 1.6rem 0; padding: 1.6rem 1rem 1rem; border: 1px solid var(--rule); border-radius: 8px; background: var(--card); text-align: center; }
.ad-slot::before { content: "PR"; position: absolute; top: 0.35rem; left: 0.6rem; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; color: var(--muted); }
.ad-slot img { max-width: 100%; height: auto; }

/* notices */
.box { padding: 0.9rem 1.1rem; margin: 0 0 1.4rem; border-left: 4px solid var(--accent); background: var(--note-bg); font-size: 0.95rem; line-height: 1.8; }
.box.warn { border-left-color: var(--warn-rule); background: var(--warn-bg); }
.box p:last-child, .box ul:last-child { margin-bottom: 0; }
.box strong:first-child { display: block; margin-bottom: 0.2rem; }
.draft-banner { background: var(--draft-bg); color: var(--draft-ink); padding: 0.6rem 1.25rem; text-align: center; font-size: 0.9rem; font-weight: 700; }

/* tables */
.table-wrap { overflow-x: auto; margin: 0 0 1.4rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; min-width: 30rem; }
th, td { border-bottom: 1px solid var(--rule); padding: 0.55rem 0.7rem; text-align: left; vertical-align: top; line-height: 1.6; }
th { border-bottom: 2px solid var(--strong); font-weight: 700; white-space: nowrap; }

.refs { font-size: 0.88rem; color: var(--muted); line-height: 1.7; }
.refs li { margin-bottom: 0.6rem; word-break: break-all; }
.refs a { color: var(--muted); }

.related { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); }
.related h2 { border: 0; margin-top: 0; padding-top: 0; font-size: 1.05rem; }

.author-box { margin-top: 2.5rem; padding: 0.9rem 1.1rem; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); font-size: 0.92rem; line-height: 1.8; color: var(--muted); }
.author-box p { margin: 0; }
.author-box strong { color: var(--ink); margin-right: 0.8rem; }
.app-cta { margin-top: 2.5rem; padding: 1rem 1.2rem; border: 1px solid var(--rule); border-left: 4px solid var(--accent-2); border-radius: 6px; background: var(--card); }
.app-cta p { margin: 0 0 0.6rem; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); font-weight: 700; padding: 0.55rem 1.1rem; border-radius: 3px; text-decoration: none; border: 0; font-size: 1rem; font-family: inherit; cursor: pointer; }
.btn:hover { filter: brightness(1.08); }

footer.site-foot { border-top: 1px solid var(--rule); background: var(--card); padding: 1.4rem 0 2.5rem; font-size: 0.85rem; color: var(--muted); line-height: 1.8; }
footer.site-foot nav { display: flex; flex-wrap: wrap; gap: 0.2rem 1.2rem; margin-bottom: 0.8rem; }
footer.site-foot a { color: var(--muted); }

/* weight planner: styled like a log sheet */
.planner { border: 1px solid var(--rule); border-top: 3px solid var(--accent-2); border-radius: 10px; background: var(--card); padding: 1.1rem 1.2rem 1.3rem; margin: 1.5rem 0 2rem; }
.planner h3 { margin: 0 0 0.3rem; font-size: 1.1rem; }
.planner .sub { font-size: 0.88rem; color: var(--muted); margin: 0 0 1rem; line-height: 1.7; }
.planner form { display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); gap: 0.9rem 1rem; }
.planner label { display: block; font-size: 0.85rem; font-weight: 700; line-height: 1.5; }
.planner input[type="number"], .planner select { display: block; width: 100%; margin-top: 0.25rem; padding: 0.5rem 0.6rem; font-size: 1rem; font-family: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--muted); border-radius: 4px; font-variant-numeric: tabular-nums; }
.planner .check { grid-column: 1 / -1; font-weight: 400; display: flex; gap: 0.6rem; align-items: flex-start; }
.planner .check input { margin-top: 0.45rem; }
.planner .actions { grid-column: 1 / -1; }
.planner .out { margin-top: 1.1rem; border-top: 1px solid var(--rule); padding-top: 1rem; }
.planner .out[hidden] { display: none; }
.planner .big { font-size: 2.2rem; font-weight: 800; line-height: 1.2; margin: 0.1rem 0 0.2rem; font-variant-numeric: tabular-nums; }
.planner .big small { font-size: 1rem; font-weight: 700; margin-left: 0.25rem; }
.planner .out ul { padding-left: 1.2rem; margin-bottom: 0.8rem; }
.planner .caveat { font-size: 0.82rem; color: var(--muted); line-height: 1.7; }
.planner .error { color: var(--warn-rule); font-weight: 700; }

@media (max-width: 34rem) {
  html { font-size: 16px; }
  h1 { font-size: 1.6rem; }
  .hero h1 { font-size: 1.7rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }
@media print { .site-head, .site-foot, .planner form, .app-cta { display: none; } html { font-size: 12pt; } }