/* Lex50 Portal — 水色パステル design system
   palette: himesystems.com / sidebar: こうな姫株式会社 studio */
:root{
  --bg:#F0F9FF; --surface:#FFFFFF; --surface-2:#F8FCFF;
  --ink:#0C4A6E; --ink-soft:#3B6E92; --muted:#6B94B3;
  --line:#E0F2FE; --line-strong:#BAE6FD;
  --sky:#38BDF8; --sky-deep:#0284C7; --sky-pale:#E0F2FE;
  --sky-wash:#EFF9FF; --sky-soft:rgba(56,189,248,.10);
  --sakura:#F9A8D4; --sakura-deep:#DB2777; --sakura-soft:rgba(249,168,212,.12);
  --code:#0284C7; --accent:var(--sky-deep);
  --shadow-panel:0 24px 60px -40px rgba(20,30,55,.5);
  --serif:"Hiragino Mincho ProN","Yu Mincho",YuMincho,"Noto Serif JP",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",YuGothic,"Noto Sans JP",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,"DejaVu Sans Mono",monospace;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0B1220; --surface:#111B2E; --surface-2:#0E1626;
    --ink:#DBEAFE; --ink-soft:#A8C6E2; --muted:#7FA3C4;
    --line:#1B2C47; --line-strong:#2A4265;
    --sky:#38BDF8; --sky-deep:#7DD3FC; --sky-pale:#12233C;
    --sky-wash:#0F1D33; --sky-soft:rgba(56,189,248,.14);
    --sakura:#F9A8D4; --sakura-deep:#F9A8D4; --sakura-soft:rgba(249,168,212,.10);
    --code:#7DD3FC;
    --shadow-panel:0 24px 60px -40px rgba(0,0,0,.8);
  }
}
:root[data-theme="light"]{
  --bg:#F0F9FF; --surface:#FFFFFF; --surface-2:#F8FCFF;
  --ink:#0C4A6E; --ink-soft:#3B6E92; --muted:#6B94B3;
  --line:#E0F2FE; --line-strong:#BAE6FD;
  --sky:#38BDF8; --sky-deep:#0284C7; --sky-pale:#E0F2FE;
  --sky-wash:#EFF9FF; --sky-soft:rgba(56,189,248,.10);
  --sakura:#F9A8D4; --sakura-deep:#DB2777; --sakura-soft:rgba(249,168,212,.12);
  --code:#0284C7;
  --shadow-panel:0 24px 60px -40px rgba(20,30,55,.5);
}
:root[data-theme="dark"]{
  --bg:#0B1220; --surface:#111B2E; --surface-2:#0E1626;
  --ink:#DBEAFE; --ink-soft:#A8C6E2; --muted:#7FA3C4;
  --line:#1B2C47; --line-strong:#2A4265;
  --sky:#38BDF8; --sky-deep:#7DD3FC; --sky-pale:#12233C;
  --sky-wash:#0F1D33; --sky-soft:rgba(56,189,248,.14);
  --sakura:#F9A8D4; --sakura-deep:#F9A8D4; --sakura-soft:rgba(249,168,212,.10);
  --code:#7DD3FC;
  --shadow-panel:0 24px 60px -40px rgba(0,0,0,.8);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  line-height:1.7;-webkit-font-smoothing:antialiased;font-feature-settings:"palt" 1}
a{color:inherit}
.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(16px,4vw,40px)}

/* ---------- top nav (himesystems風 sticky) ---------- */
.topnav{position:sticky;top:0;z-index:40;border-bottom:1px solid var(--line-strong);
  background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px)}
.topnav-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:56px}
.brand{display:flex;align-items:baseline;gap:10px;text-decoration:none}
.brand-mark{font-family:var(--serif);font-size:18px;font-weight:600;color:var(--sky-deep);letter-spacing:.02em}
.brand-sub{font-size:11.5px;color:var(--muted);letter-spacing:.08em}
@media (max-width:560px){.brand-sub{display:none}}
.topnav-r{display:flex;align-items:center;gap:18px}
.topnav-r a{font-size:12.5px;color:var(--ink-soft);text-decoration:none;letter-spacing:.04em}
.topnav-r a:hover{color:var(--sky-deep)}
@media (max-width:640px){.topnav-r a.hide{display:none}}

/* ---------- masthead ---------- */
header.mast{border-bottom:1px solid var(--line-strong);padding:clamp(28px,5vw,52px) 0 22px;
  background:linear-gradient(180deg,var(--sky-pale) 0%,var(--bg) 78%)}
.eyebrow{font-size:12px;letter-spacing:.28em;text-transform:uppercase;color:var(--sky-deep);
  font-weight:700;margin:0 0 14px}
.crumb{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--muted);
  font-family:var(--mono);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:var(--code);text-decoration:none}
.crumb a:hover{text-decoration:underline}
.crumb-here{color:var(--muted)}
.title-row{display:flex;align-items:baseline;gap:clamp(14px,3vw,28px);flex-wrap:wrap}
.cc-num{font-family:var(--serif);font-size:clamp(56px,12vw,104px);line-height:.85;
  font-weight:300;color:var(--accent);letter-spacing:-.01em}
.cc-name{font-family:var(--serif);font-size:clamp(24px,5vw,42px);font-weight:500;
  text-wrap:balance;margin:0}
.cc-name small{display:block;font-family:var(--mono);font-size:13px;letter-spacing:.12em;
  color:var(--muted);font-weight:400;margin-top:8px}
.stats{display:flex;gap:18px;flex-wrap:wrap;align-items:center;margin-top:22px;
  font-size:13.5px;color:var(--ink-soft)}
.stats b{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink);font-weight:600}
.stats .dot{color:var(--line-strong)}
.prov{margin-top:14px;font-size:12.5px;color:var(--muted)}

/* ---------- hero (index) — himesystems hero-gradient ---------- */
.hero{border-bottom:none;padding-bottom:8px;
  background:radial-gradient(circle at 82% 0%,var(--sakura-soft) 0%,transparent 38%),
    linear-gradient(180deg,var(--sky-pale) 0%,var(--bg) 62%,var(--bg) 100%)}
.hero-title{display:flex;align-items:baseline;gap:clamp(16px,3vw,32px);flex-wrap:wrap}
.hero-w{font-family:var(--serif);font-size:clamp(64px,14vw,128px);line-height:.85;font-weight:300;
  letter-spacing:-.02em;background:linear-gradient(135deg,var(--sky),var(--sky-deep));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-name{font-family:var(--serif);font-size:clamp(26px,5vw,44px);font-weight:500;margin:0;text-wrap:balance}
.hero-name small{display:block;font-family:var(--sans);font-size:14px;letter-spacing:.06em;
  color:var(--muted);font-weight:400;margin-top:10px}
.hero-lede{max-width:64ch;font-size:15px;color:var(--ink-soft);margin:22px 0 0;text-wrap:pretty}

/* representative chips */
.coord-demo{display:flex;align-items:stretch;gap:6px;flex-wrap:wrap;margin-top:26px}
.coord-chip{display:flex;flex-direction:column;gap:2px;padding:10px 14px;border:1px solid var(--line-strong);
  border-radius:12px;background:var(--surface);text-decoration:none;min-width:64px}
.coord-chip b{font-family:var(--mono);font-size:20px;color:var(--code);font-weight:600}
.coord-chip i{font-style:normal;font-size:10.5px;color:var(--muted);letter-spacing:.02em}
a.coord-chip:hover{border-color:var(--sky);background:var(--sky-wash)}
.coord-sep{align-self:center;color:var(--line-strong);font-size:18px}

/* search */
.search-row{display:flex;gap:10px;align-items:center}
.search{flex:1;font-family:var(--sans);font-size:14px;color:var(--ink);
  background:var(--surface);border:1px solid var(--line-strong);border-radius:10px;padding:12px 14px}
.search::placeholder{color:var(--muted)}
.search:focus{outline:2px solid var(--sky);outline-offset:1px;border-color:transparent}
.empty{color:var(--muted);font-size:14px;padding:28px 0;text-align:center;margin:0}

/* ---------- sidebar layout ---------- */
.layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:clamp(20px,4vw,44px);
  padding:26px 0 60px;align-items:start}
@media (max-width:860px){.layout{grid-template-columns:1fr}}
aside.side{position:sticky;top:70px;display:flex;flex-direction:column;gap:14px;
  max-height:calc(100vh - 84px)}
@media (max-width:860px){aside.side{position:static;max-height:none}}
.side .search-row{margin-top:0}
.side-label{font-size:11px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase;
  font-weight:700;margin:4px 0 0}

/* side panel — こうな姫 studio practice style */
.panel-hd{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:13px 16px;border-bottom:1px solid var(--line)}
.panel-hd span{font-family:var(--serif);font-size:14px;font-weight:600;letter-spacing:.04em}
.panel-hd .glyph{color:var(--sky);font-size:15px;line-height:1}
.group-nav,.legend,.tt-list{border:1px solid var(--line);border-radius:14px;
  background:var(--surface);overflow:hidden;box-shadow:var(--shadow-panel)}
.group-nav{display:flex;flex-direction:column}
.group-nav a{display:flex;align-items:center;gap:10px;padding:9px 16px;
  border-bottom:1px solid var(--line);font-size:13px;text-decoration:none;line-height:1.35}
.group-nav a:last-child{border-bottom:0}
.group-nav a:hover{background:var(--surface-2)}
.group-nav a::after{content:"›";color:var(--line-strong);font-size:14px;margin-left:2px}
.group-nav a:hover::after{color:var(--sky-deep)}
.g-dot{width:9px;height:9px;border-radius:50%;background:var(--dot);flex:none}
.g-name{flex:1;min-width:0}
.g-range{font-family:var(--mono);font-size:10.5px;color:var(--muted);flex:none}
.legend{display:flex;flex-direction:column}
.legend p{display:flex;align-items:center;gap:10px;margin:0;font-size:12px;color:var(--ink-soft);
  padding:9px 16px;border-bottom:1px solid var(--line)}
.legend p:last-child{border-bottom:0}
.legend .badge{flex:none;min-width:64px;text-align:center}
.back-link{font-size:12.5px;color:var(--code);text-decoration:none;margin-top:2px}
.back-link:hover{text-decoration:underline}
.tt-list{display:flex;flex-direction:column;overflow-y:auto;flex:1;min-height:0}
.tt-list .panel-hd{position:sticky;top:0;background:var(--surface);z-index:1;flex:none}
@media (max-width:860px){.tt-list{max-height:40vh;flex:none}}
.side-tt{display:flex;gap:9px;align-items:baseline;padding:8px 16px;border-bottom:1px solid var(--line);
  font-size:12.5px;line-height:1.35;text-decoration:none;color:var(--ink)}
.side-tt:last-child{border-bottom:0}
a.side-tt:hover{background:var(--surface-2)}
.side-tt[aria-current="true"]{background:var(--sky-wash);box-shadow:inset 3px 0 0 var(--sky)}
.side-tt .c{font-family:var(--mono);font-size:10.5px;color:var(--code);font-weight:600;flex:none}
.side-tt.plain{color:var(--ink-soft)}
.side-tt.plain .c{color:var(--muted);font-weight:400}
.hidden{display:none!important}
.layout main{min-width:0}
.layout main .band:first-child{margin-top:0}

/* ---------- index bands ---------- */
main.wrap{padding:10px 0 60px}
.band{margin-top:clamp(30px,5vw,46px)}
.band-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  padding-bottom:10px;margin-bottom:16px;border-bottom:2px solid var(--accent)}
.band-label{font-family:var(--serif);font-size:clamp(19px,3vw,24px);font-weight:600;margin:0}
.band-range{font-family:var(--mono);font-size:12.5px;color:var(--accent);font-weight:600;letter-spacing:.06em}
.band-en{font-size:11.5px;color:var(--muted);letter-spacing:.1em;text-transform:uppercase}
.cc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(206px,1fr));gap:10px}
.cc-card{position:relative;display:flex;flex-direction:column;gap:6px;padding:14px 15px 12px;
  border:1px solid var(--line);border-radius:14px;background:var(--surface);text-decoration:none;
  transition:border-color .15s,transform .15s,box-shadow .15s}
.cc-card:hover{border-color:var(--accent);transform:translateY(-2px);
  box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 14%,transparent)}
.cc-card-num{font-family:var(--serif);font-size:26px;font-weight:300;color:var(--accent);line-height:1}
.cc-card-name{font-size:13.5px;font-weight:600;line-height:1.4;text-wrap:balance;min-height:2.6em}
.badge{align-self:flex-start;font-family:var(--mono);font-size:10px;letter-spacing:.05em;
  padding:2px 9px;border-radius:100px}
.badge-full{background:var(--sakura-soft);color:var(--sakura-deep);border:1px solid var(--sakura)}
.badge-part{background:var(--sky-soft);color:var(--sky-deep);
  border:1px solid color-mix(in srgb,var(--sky) 45%,transparent)}
.badge-seed{background:none;color:var(--muted);border:1px solid var(--line-strong)}

/* ---------- about strip ---------- */
.about-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;
  padding-top:22px}
.about-card{border:1px solid var(--line);border-radius:14px;background:var(--surface);
  padding:18px 20px;box-shadow:var(--shadow-panel)}
.about-card h2{font-family:var(--serif);font-size:16px;font-weight:600;margin:0 0 8px;color:var(--sky-deep)}
.about-card p{font-size:13.5px;color:var(--ink-soft);margin:0;text-wrap:pretty}

/* ---------- law page: white content panel ---------- */
.main-panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;
  padding:clamp(20px,4vw,36px);box-shadow:var(--shadow-panel)}
.law-lede{font-family:var(--serif);font-size:clamp(15.5px,2.4vw,18px);line-height:1.9;
  color:var(--ink);max-width:64ch;margin:0;text-wrap:pretty}
.sec{margin-top:clamp(26px,4vw,38px)}
.sec h2{font-family:var(--serif);font-size:clamp(17px,3vw,21px);font-weight:600;margin:0 0 12px;
  padding-bottom:8px;border-bottom:2px solid var(--accent)}
.sec p{font-size:14px;color:var(--ink-soft);max-width:70ch;text-wrap:pretty}
.hl-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.hl-list li{position:relative;padding:10px 14px 10px 34px;border:1px solid var(--line);
  border-radius:12px;background:var(--surface-2);font-size:13.5px;line-height:1.6}
.hl-list li::before{content:"";position:absolute;left:14px;top:17px;width:8px;height:8px;
  border-radius:50%;background:var(--accent)}
.toc{list-style:none;margin:0;padding:0;counter-reset:ch}
.toc li{display:flex;gap:12px;align-items:baseline;padding:9px 4px;border-bottom:1px solid var(--line);
  font-size:14px;counter-increment:ch}
.toc li::before{content:counter(ch,decimal-leading-zero);font-family:var(--mono);font-size:11.5px;
  color:var(--accent);font-weight:600;flex:none}
.toc-title{flex:1;min-width:0}
.toc-note{font-size:12px;color:var(--muted);flex:none}
.wip{margin-top:clamp(26px,4vw,38px);border:1px dashed var(--line-strong);border-radius:14px;
  background:var(--sky-wash);padding:16px 20px;font-size:13.5px;color:var(--ink-soft);max-width:70ch}
.wip b{color:var(--sky-deep)}
.tt-nav{display:flex;justify-content:space-between;gap:16px;margin:28px 0 10px;font-size:13px;flex-wrap:wrap}
.tt-nav a{color:var(--code);text-decoration:none;max-width:46%}
.tt-nav a:hover{text-decoration:underline}
.tt-nav-next{text-align:right;margin-left:auto}

/* ---------- 条文全文 ---------- */
.ft-link{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;
  padding:14px 18px;border:1px solid var(--line-strong);border-radius:12px;background:var(--sky-wash);
  text-decoration:none;transition:border-color .15s,background .15s}
.ft-link:hover{border-color:var(--sky);background:var(--sky-soft)}
.ft-link-t{font-family:var(--serif);font-size:15px;font-weight:600;color:var(--sky-deep)}
.ft-link-n{font-family:var(--mono);font-size:12.5px;color:var(--muted)}
.ft-panel{font-size:14px;line-height:2}
.ft-hen{font-family:var(--serif);font-size:clamp(18px,3vw,22px);font-weight:600;
  margin:clamp(28px,4vw,40px) 0 6px;padding-bottom:8px;border-bottom:2px solid var(--accent)}
.ft-hen:first-child{margin-top:0}
.ft-sho{font-family:var(--serif);font-size:clamp(15.5px,2.4vw,18px);font-weight:600;
  margin:clamp(20px,3vw,28px) 0 4px;color:var(--ink)}
.art{padding:10px 0 4px;border-bottom:1px solid var(--line)}
.art:target{background:var(--sky-wash);box-shadow:inset 3px 0 0 var(--sky);border-radius:8px;
  padding-left:12px;padding-right:12px}
.art p{margin:0 0 8px;max-width:76ch;text-wrap:pretty}
.art-cap{font-size:12.5px;color:var(--muted)}
.art-no{font-weight:700;color:var(--accent)}
.art-p{padding-left:1em}
.art-p b{font-family:var(--mono);font-weight:600;color:var(--ink-soft)}
.art-i{padding-left:2em;color:var(--ink-soft)}
.art-x{color:var(--ink-soft)}
.ft-nav-sho{padding-left:26px}
.art-jump{font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;color:var(--sky-deep);
  border:1px solid var(--line-strong);border-radius:100px;padding:1px 9px;margin-left:8px;
  text-decoration:none;vertical-align:middle;white-space:nowrap}
.art-jump:hover{border-color:var(--sky);background:var(--sky-wash)}
.stats-link{color:var(--code);text-decoration:none;font-size:13px}
.stats-link:hover{text-decoration:underline}

/* ---------- drawer (フルール式・W100踏襲) ---------- */
.menu-trigger{flex:none;width:44px;height:44px;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:3px;background:var(--surface);border:1px solid var(--line-strong);
  border-radius:12px;cursor:pointer}
.menu-trigger:hover{border-color:var(--sky)}
.menu-trigger span{width:18px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform .25s ease,opacity .25s ease}
.menu-trigger em{font-style:normal;font-size:7.5px;font-weight:800;letter-spacing:.14em;
  color:var(--muted);margin-top:1px}
.menu-trigger.open span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.menu-trigger.open span:nth-child(2){opacity:0}
.menu-trigger.open span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.menu-overlay{position:fixed;inset:0;z-index:70;background:rgba(12,74,110,.35);backdrop-filter:blur(3px)}
:root[data-theme="dark"] .menu-overlay{background:rgba(2,8,20,.6)}
.drawer{position:fixed;top:0;right:0;height:100dvh;width:min(86vw,380px);z-index:71;
  background:var(--surface);border-left:1px solid var(--line-strong);
  box-shadow:-16px 0 40px rgba(2,132,199,.15);
  transform:translateX(105%);transition:transform .32s cubic-bezier(.22,.8,.3,1)}
.drawer.open{transform:none}
.drawer-inner{height:100%;padding:70px 30px 30px;display:flex;flex-direction:column;overflow-y:auto}
.drawer-title{font-family:var(--serif);font-size:22px;font-weight:600;color:var(--ink);
  margin:0 0 14px;padding-bottom:10px;border-bottom:2px solid var(--sky)}
.drawer-title span{font-size:14px;color:var(--muted);font-weight:400;margin-left:8px}
.drawer ul{list-style:none;margin:0;padding:0}
.drawer li{opacity:0;transform:translateX(22px)}
.drawer.open li{animation:dIn .4s ease forwards;animation-delay:calc(var(--i) * .05s + .1s)}
@keyframes dIn{to{opacity:1;transform:translateX(0)}}
.drawer a{display:flex;flex-direction:column;gap:2px;padding:13px 2px;
  border-bottom:1px solid var(--line);text-decoration:none}
.drawer a:hover{background:var(--sky-wash);border-radius:8px}
.d-en{font-family:var(--mono);font-size:15px;font-weight:700;letter-spacing:.1em}
.d-ja{font-size:12.5px;color:var(--ink-soft)}
.drawer-note{margin-top:auto;padding-top:18px;font-size:11px;color:var(--muted);line-height:1.8}
@media (prefers-reduced-motion:reduce){.drawer li{opacity:1;transform:none}}

/* ---------- chrome ---------- */
.theme-btn{flex:none;height:34px;padding:0 14px;border-radius:100px;border:1px solid var(--line-strong);
  background:var(--surface);color:var(--muted);font-size:13px;cursor:pointer}
.theme-btn:hover{color:var(--sky-deep);border-color:var(--sky)}
.site-foot{border-top:1px solid var(--line);padding:22px 0 44px;color:var(--muted);
  font-size:12px;text-align:center;margin-top:20px}
.site-foot a{color:var(--muted)}
.site-foot a:hover{color:var(--sky-deep)}
.foot-brand{font-family:var(--serif);font-size:13px;text-decoration:none}
.foot-note{margin:6px 0 0}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto;transition:none!important}}