/* ============================================================
   AI-380 Reading Hub — shared design system
   "Dharma, Dao & the Engine" visual identity
   ============================================================ */
:root{
  --ground:#eef0f4; --surface:#ffffff; --surface-2:#f6f7f9;
  --ink:#1b1d24; --muted:#5c6474; --faint:#8b93a3; --line:#dce0e8;
  --accent:#5b4b8a; --accent-soft:#efeaf7; --accent-ink:#463a72;
  /* per-tradition hues (subject-grounded tags) */
  --amber:#a86a12; --jade:#2f7a5f; --steel:#3f6389;
  --amber-bg:#f6ecda; --jade-bg:#e2f0e9; --steel-bg:#e3ecf5; --violet-bg:#ece7f6;
  --shadow:0 1px 2px rgba(20,22,30,.04),0 6px 20px rgba(20,22,30,.06);
  --shadow-lift:0 2px 6px rgba(20,22,30,.08),0 18px 40px rgba(20,22,30,.14);
  --maxw:960px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --ground:#14151b; --surface:#1c1e27; --surface-2:#222530;
  --ink:#e9ebf1; --muted:#a2aabb; --faint:#6b7386; --line:#31343f;
  --accent:#b6a6e6; --accent-soft:#2a2640; --accent-ink:#cbbdf2;
  --amber:#e0ab5e; --jade:#68c6a0; --steel:#7db0e0;
  --amber-bg:#332a1a; --jade-bg:#182c24; --steel-bg:#182530; --violet-bg:#241f36;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.35);
  --shadow-lift:0 2px 6px rgba(0,0,0,.4),0 18px 44px rgba(0,0,0,.55);
}}
:root[data-theme="dark"]{
  --ground:#14151b; --surface:#1c1e27; --surface-2:#222530;
  --ink:#e9ebf1; --muted:#a2aabb; --faint:#6b7386; --line:#31343f;
  --accent:#b6a6e6; --accent-soft:#2a2640; --accent-ink:#cbbdf2;
  --amber:#e0ab5e; --jade:#68c6a0; --steel:#7db0e0;
  --amber-bg:#332a1a; --jade-bg:#182c24; --steel-bg:#182530; --violet-bg:#241f36;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.35);
  --shadow-lift:0 2px 6px rgba(0,0,0,.4),0 18px 44px rgba(0,0,0,.55);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ground);color:var(--ink);
  font-family:"Libre Franklin",system-ui,-apple-system,sans-serif;font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3{font-family:"Fraunces","Georgia",serif;text-wrap:balance;line-height:1.15;margin:0}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}
a{color:var(--accent-ink);text-underline-offset:2px}
img{max-width:100%}
b,strong{font-weight:600;color:var(--ink)}
em{color:var(--accent-ink);font-style:italic}
.term{font-family:"IBM Plex Mono",monospace;font-size:.92em;color:var(--accent-ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--ground) 86%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;gap:6px;align-items:center;height:56px}
.brand{font-family:"Fraunces",serif;font-weight:600;font-size:1.02rem;color:var(--ink);text-decoration:none;
  margin-right:8px;white-space:nowrap;display:flex;align-items:center;gap:8px}
.brand .glyph{color:var(--accent)}
.topnav{display:flex;gap:2px;align-items:center;overflow-x:auto}
.topnav a{font-size:.88rem;color:var(--muted);text-decoration:none;padding:7px 12px;border-radius:8px;
  white-space:nowrap;font-weight:500}
.topnav a:hover{background:var(--surface-2);color:var(--ink)}
.topnav a.active{color:var(--ink);background:var(--accent-soft)}
.topbar .spacer{flex:1}
.tbtn{font-family:"IBM Plex Mono",monospace;font-size:.76rem;background:var(--surface);
  border:1px solid var(--line);color:var(--muted);border-radius:8px;padding:6px 11px;cursor:pointer;white-space:nowrap}
.tbtn:hover{color:var(--ink);border-color:var(--accent)}

/* ---------- generic ---------- */
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--accent)}
.tag{display:inline-flex;align-items:center;gap:7px;font-family:"IBM Plex Mono",monospace;
  font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:999px;font-weight:500}
.tag .dot{width:7px;height:7px;border-radius:50%}
.t-ind{background:var(--amber-bg);color:var(--amber)} .d-ind{background:var(--amber)}
.t-chi{background:var(--jade-bg);color:var(--jade)} .d-chi{background:var(--jade)}
.t-sch{background:var(--steel-bg);color:var(--steel)} .d-sch{background:var(--steel)}
.t-x{background:var(--violet-bg);color:var(--accent-ink)} .d-x{background:var(--accent)}

/* ---------- hub / index ---------- */
.hero{padding:60px 0 30px}
.hero h1{font-size:clamp(2.3rem,6vw,3.7rem);font-weight:600;letter-spacing:-.01em}
.hero .lede{color:var(--muted);font-size:1.08rem;max-width:62ch;margin:18px 0 0}
.section-label{display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  margin:38px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.section-label h2{font-size:1.3rem;font-weight:600}
.section-label .count{font-family:"IBM Plex Mono",monospace;font-size:.8rem;color:var(--faint)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;padding:20px;box-shadow:var(--shadow);text-decoration:none;color:inherit;
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);border-color:var(--accent)}
.card .unit{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--faint);margin-bottom:12px;display:flex;justify-content:space-between}
.card h3{font-size:1.28rem;font-weight:600;margin:2px 0 4px}
.card .author{font-size:.86rem;color:var(--muted);margin-bottom:12px}
.card .blurb{font-size:.92rem;color:var(--muted);margin:0 0 16px;flex:1}
.card .foot{display:flex;align-items:center;justify-content:space-between;gap:8px}
.card .go{font-size:.84rem;font-weight:600;color:var(--accent-ink)}
.card.ghost{border-style:dashed;box-shadow:none;align-items:flex-start;justify-content:center;
  color:var(--muted);background:transparent}
.card.ghost:hover{transform:none;border-color:var(--accent)}
.card.ghost .plus{font-size:1.6rem;color:var(--accent);margin-bottom:6px}

.tool-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.tool{display:flex;gap:14px;align-items:center;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:16px 18px;box-shadow:var(--shadow);text-decoration:none;color:inherit}
.tool:hover{border-color:var(--accent)}
.tool .ic{font-size:1.5rem;flex:none}
.tool b{display:block;font-size:.98rem}
.tool span{font-size:.82rem;color:var(--muted)}

/* ---------- reading page ---------- */
.readhead{padding:44px 0 8px}
.readhead h1{font-size:clamp(1.9rem,5vw,2.9rem);font-weight:600;letter-spacing:-.01em;margin:14px 0 6px}
.readhead .byline{color:var(--faint);font-size:.9rem}
.readhead .byline .mono{color:var(--muted)}
.article{padding:8px 0 20px;max-width:none}
.article .col{max-width:70ch}
.article h2{font-size:clamp(1.4rem,3.5vw,1.85rem);font-weight:600;margin:34px 0 6px;letter-spacing:-.01em;
  padding-top:10px;scroll-margin-top:70px}
.article h3{font-size:1.1rem;font-weight:600;margin:24px 0 8px;color:var(--accent-ink)}
.article p{margin:0 0 14px;max-width:70ch}
.thesis{border-left:3px solid var(--accent);background:var(--surface);border-radius:0 12px 12px 0;
  padding:16px 20px;box-shadow:var(--shadow);margin:8px 0}
.thesis .lbl{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent);display:block;margin-bottom:6px}
.thesis p{margin:0;font-size:1.03rem}
.article ul{margin:8px 0 16px;padding-left:0;list-style:none;max-width:70ch}
.article li{position:relative;padding-left:22px;margin:9px 0}
.article li::before{content:"";position:absolute;left:4px;top:11px;width:5px;height:5px;border-radius:50%;
  background:var(--accent);opacity:.7}

.tbl{border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);
  margin:14px 0 18px;background:var(--surface);max-width:70ch}
.tbl .row{display:grid;grid-template-columns:150px 1fr;border-top:1px solid var(--line)}
.tbl .row:first-child{border-top:none}
.tbl .k{padding:11px 14px;font-family:"IBM Plex Mono",monospace;font-size:.84rem;color:var(--accent-ink);
  background:var(--surface-2);font-weight:500}
.tbl .v{padding:11px 15px;font-size:.92rem;color:var(--muted)}
.tbl .v b{color:var(--ink)}
@media(max-width:560px){.tbl .row{grid-template-columns:1fr}.tbl .k{border-bottom:1px solid var(--line)}}

/* prev / next */
.pager{display:flex;gap:12px;justify-content:space-between;margin:36px 0 10px;flex-wrap:wrap}
.pager a{flex:1 1 220px;background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:14px 16px;text-decoration:none;color:inherit;box-shadow:var(--shadow)}
.pager a:hover{border-color:var(--accent)}
.pager .dir{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--faint)}
.pager a.nextlink{text-align:right}
.pager b{display:block;margin-top:4px;font-weight:600}

/* ---------- footer ---------- */
footer{padding:40px 0 60px;color:var(--faint);font-size:.84rem;border-top:1px solid var(--line);margin-top:30px}
footer a{color:var(--muted)}

/* ---------- life hub: breadcrumbs ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;padding:14px 0 0;
  font-family:"IBM Plex Mono",monospace;font-size:.76rem;color:var(--faint)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent-ink)}
.crumbs .sep{color:var(--faint);opacity:.6}
.crumbs .here{color:var(--ink)}

/* ---------- life hub: home hero ---------- */
.life-hero{padding:64px 0 12px}
.life-hero .eyebrow{margin-bottom:14px}
.life-hero h1{font-size:clamp(2.4rem,6.5vw,4rem);font-weight:600;letter-spacing:-.015em}
.life-hero .lede{color:var(--muted);font-size:1.1rem;max-width:60ch;margin:18px 0 0}
.now{margin-top:22px;display:inline-flex;gap:10px;align-items:center;background:var(--surface);
  border:1px solid var(--line);border-radius:12px;padding:12px 16px;box-shadow:var(--shadow);font-size:.9rem}
.now .k{font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.now .v{color:var(--muted)} .now .v b{color:var(--ink)}

/* ---------- life hub: area cards ---------- */
.area-card{position:relative;overflow:hidden;padding-left:22px}
.area-card .stripe{position:absolute;inset:0 auto 0 0;width:4px}
.area-card .icon{font-size:1.9rem;line-height:1;margin-bottom:14px}
.area-card .count{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--faint)}
.area-card .soon{font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--faint);border:1px solid var(--line);border-radius:999px;padding:3px 9px}
.card.disabled{cursor:default}
.card.disabled:hover{transform:none;box-shadow:var(--shadow);border-color:var(--line)}

/* ---------- life hub: empty state ---------- */
.empty{background:var(--surface);border:1px dashed var(--line);border-radius:16px;
  padding:34px 26px;text-align:center;color:var(--muted);box-shadow:none}
.empty .big{font-size:1.7rem;margin-bottom:8px}
.empty h3{font-size:1.1rem;font-weight:600;color:var(--ink);margin-bottom:6px}
.empty p{max-width:46ch;margin:0 auto;font-size:.92rem}

/* ---------- flashcards ---------- */
.deck-head{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;justify-content:space-between;margin:6px 0 10px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 22px}
.chip{font-size:.82rem;font-weight:500;padding:7px 13px;border-radius:999px;border:1px solid var(--line);
  background:var(--surface);color:var(--muted);cursor:pointer;font-family:inherit;display:inline-flex;gap:7px;align-items:center}
.chip .dot{width:7px;height:7px;border-radius:50%}
.chip[aria-pressed="true"]{border-color:var(--accent);color:var(--ink);background:var(--accent-soft)}
.card-stage{perspective:1600px;max-width:640px;margin:0 auto}
.flipcard{position:relative;width:100%;min-height:300px;cursor:pointer;border:none;background:none;padding:0;
  text-align:left;font-family:inherit;display:block}
.flip-inner{position:relative;width:100%;min-height:300px;transition:transform .5s cubic-bezier(.6,.05,.2,1);
  transform-style:preserve-3d}
.flipcard.flipped .flip-inner{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  border-radius:18px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-lift);
  padding:26px 28px;display:flex;flex-direction:column}
.face.back{transform:rotateY(180deg)}
.face .meta{display:flex;justify-content:space-between;align-items:center;gap:10px}
.face .side{font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.qtext{font-family:"Fraunces",serif;font-size:clamp(1.3rem,3.4vw,1.7rem);font-weight:500;line-height:1.25;
  margin:22px 0;color:var(--ink);text-wrap:balance}
.atext{font-size:1.02rem;line-height:1.55;margin:18px 0 0;color:var(--ink);overflow-y:auto}
.hint{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--faint);margin-top:auto;padding-top:14px}
.known-flag{color:var(--jade);opacity:0;transition:opacity .2s}
.flipcard.known .known-flag{opacity:1}
.controls{display:flex;align-items:center;gap:10px;margin:20px auto 0;max-width:640px;flex-wrap:wrap}
.controls .count{font-family:"IBM Plex Mono",monospace;font-size:.86rem;color:var(--muted);
  font-variant-numeric:tabular-nums;min-width:74px}
.btn{font-family:inherit;font-size:.88rem;font-weight:500;padding:9px 15px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.btn:hover{border-color:var(--accent)}
.btn.ghost{background:transparent}
.nav-arrows{display:flex;gap:8px;margin-left:auto}
.iconbtn{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:var(--surface);
  color:var(--ink);cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center}
.iconbtn:hover{border-color:var(--accent)}
.progress{height:5px;border-radius:999px;background:var(--line);overflow:hidden;margin:18px auto 0;max-width:640px}
.progress i{display:block;height:100%;background:var(--accent);width:0;transition:width .3s;border-radius:999px}
.deck-stats{font-family:"IBM Plex Mono",monospace;font-size:.8rem;color:var(--muted)}
.deck-stats b{color:var(--jade)}

/* reading-page action buttons (original PDF + print) */
.read-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.read-actions .tbtn{display:inline-flex;align-items:center;font-size:.82rem}

/* ---------- weeks (AI-380 hub, grouped) ---------- */
.week{margin:0 0 30px}
.week-head{display:flex;align-items:baseline;gap:12px;margin:0 0 14px;
  padding-bottom:8px;border-bottom:1px solid var(--line)}
.week-head .wk{font-family:"IBM Plex Mono",monospace;font-size:.76rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent);font-weight:500;white-space:nowrap}
.week-head .wk-title{font-family:"Fraunces",serif;font-size:1.06rem;font-weight:500;color:var(--ink)}
.week-head .wk-count{margin-left:auto;font-family:"IBM Plex Mono",monospace;font-size:.74rem;
  color:var(--faint);white-space:nowrap}
.week.is-empty{margin:0 0 4px}
.week.is-empty .week-head{border-bottom-color:transparent;margin:0;padding-bottom:6px}
.week-head .wk-empty-note{font-size:.82rem;color:var(--faint);font-style:italic}

/* reading cards (div acting as a link, with a distinct PDF link) */
.reading-card{cursor:pointer}
.reading-card .foot{gap:10px}
.reading-card .foot .go{color:var(--accent-ink);text-decoration:none;font-weight:600}
.reading-card:hover .foot .go{text-decoration:underline}
.foot-right{display:inline-flex;align-items:center;gap:10px;flex:none}
.cards-n{font-size:.74rem;color:var(--faint)}
.pdf-link{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--muted);text-decoration:none;
  border:1px solid var(--line);border-radius:999px;padding:3px 9px;white-space:nowrap}
.pdf-link:hover{border-color:var(--accent);color:var(--accent-ink)}

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

/* ---------- print / save-as-PDF (compact) ---------- */
@media print {
  html{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  @page{margin:11mm 12mm}
  .topbar,.crumbs,.pager,footer,.read-actions,.print-btn{display:none !important}
  body{background:#fff;color:#111;font-size:9pt;line-height:1.36}
  .wrap{max-width:none;padding:0}
  a{color:#111;text-decoration:none}
  .readhead{padding:0 0 3px}
  .readhead h1{font-size:18pt;margin:6px 0 2px}
  .readhead .byline{color:#555;font-size:8pt}
  .readhead .tag{font-size:6.6pt;padding:2px 7px}
  .article{padding:0}
  .article .col{max-width:none}
  .article h2{font-size:12.5pt;margin:13px 0 3px;padding-top:0;break-after:avoid}
  .article h3{font-size:10pt;margin:10px 0 3px;break-after:avoid;color:#000}
  .article p{margin:0 0 6px;max-width:none}
  .article ul{margin:4px 0 8px;break-inside:auto}
  .article li{margin:3px 0;padding-left:14px;max-width:none}
  .article li::before{top:6px;width:3.5px;height:3.5px}
  .thesis{box-shadow:none;background:#f2f0f8;border-left:2.5px solid #5b4b8a;
    padding:9px 12px;margin:4px 0;border-radius:0 6px 6px 0;break-inside:avoid}
  .thesis .lbl{color:#5b4b8a;font-size:6.6pt;margin-bottom:3px}
  .thesis p{font-size:9pt}
  .tbl{box-shadow:none;margin:8px 0 10px;break-inside:avoid}
  .tbl .row{grid-template-columns:118px 1fr}
  .tbl .k{background:#f4f4f6;padding:5px 9px;font-size:8pt}
  .tbl .v{padding:5px 9px;font-size:8.4pt}
  .term,em{color:#3a2f63}
  .term{font-size:.9em}
}