/* =========================================================
   mind-upload.com — shared design system (integrated guide)
   Dark theme, textbook layout. Used by all chapter pages.
   ========================================================= */
:root{
  --bg:#0a0d14; --bg-2:#070a10; --panel:#121829; --panel-2:#161e33; --panel-3:#0f1422;
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.16);
  --ink:#e9edf7; --muted:#9aa6bd; --faint:#697389;
  --brand:#5ed8c6; --brand-2:#7aa2ff;
  --done:#5fd6a4; --now:#f3b65b; --soon:#7aa2ff; --far:#c89bff; --open:#f2748a;
  --grad:linear-gradient(135deg,#5ed8c6 0%,#7aa2ff 100%);
  --max:1080px;
  --mono:"SF Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"Inter","Noto Sans JP",-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans",Meiryo,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{
  margin:0;font-family:var(--sans);color:var(--ink);line-height:1.78;
  background:
    radial-gradient(1200px 640px at 84% -8%,rgba(122,162,255,.10),transparent 58%),
    radial-gradient(1000px 560px at 6% 2%,rgba(94,216,198,.08),transparent 56%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
::selection{background:rgba(94,216,198,.25)}
#progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:60;background:var(--grad)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);
  background:rgba(8,11,17,.80);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--max);margin:0 auto;padding:12px 22px;display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;text-decoration:none;letter-spacing:.2px;white-space:nowrap}
.brand .dot{width:11px;height:11px;border-radius:50%;background:var(--grad);box-shadow:0 0 16px rgba(94,216,198,.6);flex:none}
.brand small{color:var(--faint);font-weight:500;font-size:.68rem;letter-spacing:.12em;text-transform:uppercase}
.primary-nav{margin-left:auto;display:flex;gap:2px;flex-wrap:wrap}
.primary-nav a{text-decoration:none;color:var(--muted);font-size:.82rem;font-weight:500;
  padding:7px 9px;border-radius:8px;transition:.18s;white-space:nowrap}
.primary-nav a:hover{color:var(--ink);background:var(--panel)}
.primary-nav a.active{color:var(--brand)}
.nav-toggle{display:none;background:none;border:1px solid var(--line-2);color:var(--ink);
  border-radius:8px;padding:6px 11px;font-size:1.1rem;cursor:pointer}

/* language switcher */
.lang-switch{display:flex;align-items:center;gap:1px;border:1px solid var(--line-2);border-radius:8px;
  overflow:hidden;flex:none;margin-left:14px}
.lang-switch a{text-decoration:none;color:var(--muted);font-size:.72rem;font-weight:700;letter-spacing:.04em;
  padding:6px 10px;transition:.18s;white-space:nowrap;background:transparent}
.lang-switch a:hover{color:var(--ink);background:var(--panel)}
.lang-switch a[aria-current="true"]{color:#0a0d14;background:var(--brand)}

/* ---------- layout / typography ---------- */
main{max-width:var(--max);margin:0 auto;padding:0 22px}
section{padding:52px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:0}
.eyebrow{font-family:var(--mono);font-size:.73rem;letter-spacing:.18em;text-transform:uppercase;color:var(--brand);margin:0 0 12px}
h1{font-size:clamp(1.9rem,5vw,3rem);line-height:1.14;letter-spacing:-.02em;margin:.2em 0 .35em;font-weight:800}
h2{font-size:clamp(1.4rem,3vw,1.95rem);line-height:1.22;letter-spacing:-.01em;margin:0 0 .55em;font-weight:700}
h3{font-size:1.12rem;margin:1.6em 0 .5em;font-weight:700}
h4{font-size:1rem;margin:1.2em 0 .35em;font-weight:700}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
p{margin:0 0 1em;color:#d3dae8}
.lead{font-size:1.07rem;color:var(--muted);max-width:66ch}
.muted{color:var(--muted)}
.small{font-size:.85rem}
code{font-family:var(--mono);font-size:.86em;background:var(--panel);padding:.12em .4em;border-radius:5px;color:#bfe9e0}
sup{line-height:0}
sup a{color:var(--brand-2);text-decoration:none;font-weight:600;font-size:.7em;padding:0 .06em}
sup a:hover{text-decoration:underline}
ul.plain{margin:0 0 1em;padding-left:1.3em}
ul.plain li{margin:.35em 0;color:#d3dae8}
a.inline{color:var(--brand);text-decoration:none;border-bottom:1px solid rgba(94,216,198,.35)}
a.inline:hover{border-bottom-color:var(--brand)}

/* ---------- chapter hero ---------- */
.ch-hero{padding-top:56px}
.ch-hero .badge{display:inline-flex;align-items:center;gap:9px;font-size:.75rem;font-weight:600;color:var(--brand);
  background:rgba(94,216,198,.08);border:1px solid rgba(94,216,198,.25);padding:6px 13px;border-radius:999px;text-decoration:none}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 0 rgba(94,216,198,.5);animation:pulse 2.2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(94,216,198,.5)}70%{box-shadow:0 0 0 9px rgba(94,216,198,0)}100%{box-shadow:0 0 0 0 rgba(94,216,198,0)}}
.ch-meta{display:flex;flex-wrap:wrap;gap:8px 22px;color:var(--faint);font-size:.8rem;margin-top:14px;font-family:var(--mono)}

/* ---------- boxes ---------- */
.def,.key,.note,.warn,.aside{border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin:1.4em 0;background:var(--panel)}
.def{border-left:3px solid var(--brand)}
.def .tag,.key .tag,.note .tag,.warn .tag,.aside .tag{display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;
  text-transform:uppercase;margin-bottom:8px;color:var(--brand)}
.key{border-left:3px solid var(--brand-2);background:linear-gradient(180deg,var(--panel),rgba(18,24,41,.5))}
.key .tag{color:var(--brand-2)}
.key ul{margin:0;padding-left:1.25em}
.key li{margin:.4em 0;color:#d3dae8}
.note{background:rgba(95,214,164,.05);border-color:rgba(95,214,164,.22)}
.note .tag{color:var(--done)}
.warn{background:rgba(242,116,138,.06);border-color:rgba(242,116,138,.22);color:#e4d2d6}
.warn .tag{color:var(--open)}
.aside{background:var(--panel-3)}
.aside .tag{color:var(--far)}
.def p:last-child,.key p:last-child,.note p:last-child,.warn p:last-child,.aside p:last-child{margin-bottom:0}

/* ---------- chapter TOC ---------- */
.toc{background:var(--panel-3);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:22px 0 0}
.toc .tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--faint)}
.toc ol{margin:.6em 0 0;padding-left:1.4em;columns:2;column-gap:34px}
.toc li{margin:.3em 0;font-size:.92rem;break-inside:avoid}
.toc a{color:var(--muted);text-decoration:none}
.toc a:hover{color:var(--brand)}

/* ---------- tables ---------- */
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:14px;margin:1.4em 0;background:var(--panel-3)}
table{border-collapse:collapse;width:100%;font-size:.88rem;min-width:640px}
th,td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
thead th{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);
  background:var(--panel);position:sticky;top:0}
tbody tr:last-child td{border-bottom:0}
td b{color:var(--ink)}
td,th{color:#cdd5e4}
.num{font-variant-numeric:tabular-nums;font-family:var(--mono);font-size:.85em;white-space:nowrap}

/* status chips */
.chip{display:inline-block;font-family:var(--mono);font-size:.66rem;letter-spacing:.05em;padding:2px 9px;border-radius:999px;white-space:nowrap}
.chip.done{color:var(--done);background:rgba(95,214,164,.12);border:1px solid rgba(95,214,164,.3)}
.chip.now{color:var(--now);background:rgba(243,182,91,.1);border:1px solid rgba(243,182,91,.3)}
.chip.soon{color:var(--soon);background:rgba(122,162,255,.1);border:1px solid rgba(122,162,255,.3)}
.chip.far{color:var(--far);background:rgba(200,155,255,.1);border:1px solid rgba(200,155,255,.28)}
.chip.open{color:var(--open);background:rgba(242,116,138,.1);border:1px solid rgba(242,116,138,.28)}

/* ---------- meters (progress axes) ---------- */
.meters{display:grid;gap:14px;margin:1.4em 0}
.meter{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.meter .m-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.meter .m-name{font-weight:700;font-size:.98rem}
.meter .m-val{margin-left:auto;font-family:var(--mono);font-size:.8rem;color:var(--brand)}
.meter .m-bar{height:8px;border-radius:99px;background:var(--panel-3);border:1px solid var(--line);margin:10px 0 8px;overflow:hidden}
.meter .m-fill{height:100%;width:0;border-radius:99px;background:var(--grad);transition:width 1s ease}
.meter .m-desc{font-size:.84rem;color:var(--muted);margin:0}

/* ---------- organism ladder ---------- */
.ladder{display:grid;gap:10px;margin:1.4em 0}
.rung{display:grid;grid-template-columns:150px 1fr auto;gap:14px;align-items:center;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 16px}
.rung .r-name{font-weight:700;font-size:.92rem}
.rung .r-name small{display:block;font-weight:500;color:var(--faint);font-family:var(--mono);font-size:.7rem}
.rung .r-bar{height:8px;border-radius:99px;background:var(--panel-3);border:1px solid var(--line);overflow:hidden}
.rung .r-fill{height:100%;border-radius:99px;background:var(--grad)}
@media(max-width:640px){.rung{grid-template-columns:1fr;gap:8px}.rung .chip{justify-self:start}}

/* ---------- timeline (history) ---------- */
.beats{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.beat{position:relative;padding:13px 0 13px 26px}
.beat::before{content:"";position:absolute;left:-7px;top:20px;width:12px;height:12px;border-radius:50%;
  background:var(--bg);border:2px solid var(--era,var(--brand))}
.beat-date{font-family:var(--mono);font-weight:700;color:var(--era,var(--brand));font-size:.86rem}
.beat h4{margin:.22em 0 .3em;font-size:1.02rem;font-weight:700}
.beat p{margin:0;font-size:.93rem;color:#cdd5e4}
.era-block{margin:2em 0 0}
.era-block>h3{margin-top:0}
.era-block.t1{--era:#5fd6a4}.era-block.t2{--era:#74c8b6}.era-block.t3{--era:#7aa2ff}
.era-block.t4{--era:#9a9bf0}.era-block.t5{--era:#bf9bef}.era-block.t6{--era:#e08ad0}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;margin:1.4em 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px;display:flex;flex-direction:column;gap:6px}
.card h3,.card h4{margin:0}
.card p{margin:0;font-size:.88rem;color:var(--muted)}
.card .cta{margin-top:auto;padding-top:8px;font-size:.85rem;font-weight:600;color:var(--brand);text-decoration:none}
.card .cta:hover{text-decoration:underline}
a.card{text-decoration:none;transition:.18s;cursor:pointer}
a.card:hover{border-color:rgba(94,216,198,.45);transform:translateY(-2px)}
.card .k{font-family:var(--mono);font-size:.7rem;color:var(--faint);letter-spacing:.1em;text-transform:uppercase}

/* stats strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px}
.stats div{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:15px 14px}
.stats .n{font-size:1.4rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.stats .l{font-size:.76rem;color:var(--muted);margin-top:3px}

/* ---------- glossary / FAQ ---------- */
dl.gloss{margin:1.4em 0;display:grid;gap:10px}
dl.gloss>div{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 18px}
dl.gloss dt{font-weight:700;color:var(--ink)}
dl.gloss dt small{color:var(--faint);font-weight:500;font-family:var(--mono);margin-left:8px;font-size:.74rem}
dl.gloss dd{margin:.3em 0 0;font-size:.9rem;color:#cdd5e4}
details.faq{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:0;margin:10px 0}
details.faq summary{cursor:pointer;font-weight:700;padding:15px 20px;list-style:none;position:relative;padding-right:44px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-52%);
  color:var(--brand);font-weight:700;font-size:1.2rem;transition:.2s}
details.faq[open] summary::after{content:"−"}
details.faq .a{padding:0 20px 16px;color:#cdd5e4;font-size:.93rem}
details.faq .a p:last-child{margin-bottom:0}

/* ---------- references ---------- */
ol.refs{counter-reset:r;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:9px}
ol.refs li{counter-increment:r;position:relative;padding:10px 13px 10px 42px;background:var(--panel);
  border:1px solid var(--line);border-radius:10px;font-size:.8rem;color:#cfd6e5;line-height:1.55}
ol.refs li::before{content:"["counter(r)"]";position:absolute;left:12px;top:10px;font-family:var(--mono);font-size:.74rem;color:var(--brand);font-weight:700}
ol.refs a.ref-link{color:inherit;text-decoration:none}
ol.refs a.ref-link:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:3px}
ol.refs i{color:var(--muted)}

/* ---------- pager ---------- */
.pager{display:flex;gap:14px;margin:40px 0 8px;flex-wrap:wrap}
.pager a{flex:1;min-width:220px;text-decoration:none;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:16px 18px;transition:.18s}
.pager a:hover{border-color:rgba(94,216,198,.45)}
.pager .dir{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.pager .t{display:block;font-weight:700;margin-top:4px;color:var(--ink)}
.pager a.next{text-align:right}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:36px;background:var(--bg-2)}
.footer-inner{max-width:var(--max);margin:0 auto;padding:34px 22px;color:var(--muted);font-size:.85rem}
.footer-inner .brand{margin-bottom:12px}
.footer-nav{display:flex;flex-wrap:wrap;gap:4px 18px;margin:10px 0 14px}
.footer-nav a{color:var(--muted);text-decoration:none;font-size:.83rem}
.footer-nav a:hover{color:var(--brand)}
.disc{color:var(--faint);font-size:.77rem;margin-top:12px;max-width:76ch}

/* reveal animation is gated behind html.js so content stays visible without JavaScript */
html.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}

@media (max-width:920px){
  .toc ol{columns:1}
}
@media (max-width:820px){
  .nav-inner{padding:10px 14px;gap:10px}
  .site-header .brand{font-size:.86rem;gap:7px}
  .site-header .brand small{display:none}
  h1{font-size:1.75rem;line-height:1.18}
  .stats{grid-template-columns:repeat(2,1fr)}
  ol.refs{grid-template-columns:1fr}
  .primary-nav{display:none;position:absolute;top:54px;left:0;right:0;flex-direction:column;
    background:var(--bg);border-bottom:1px solid var(--line);padding:10px 16px;margin:0}
  .primary-nav.open{display:flex}
  .nav-toggle{display:block}
  .lang-switch{margin-left:auto}
  table{min-width:560px}
}