/* =============================================================================
   AIX QUEST — IBM "Suit & Tie" / mid-century corporate theme
   Warm ivory paper · muted slate-blue · brass · IBM Plex Sans · rectilinear · no dark
   ========================================================================== */
:root{
  --paper:#F6F0E4;        /* warm ivory page */
  --paper-2:#EDE4D1;      /* path/section backdrop */
  --card:#FFFBF2;         /* cards */
  --card-2:#F9F3E6;
  --ink:#1B1916;          /* warm near-black */
  --ink-2:#4A453D;
  --ink-3:#8A8170;
  --rule:#D8CDB8;         /* tan hairlines */
  --rule-2:#BBA98B;

  --navy:#3C5871;         /* muted slate/steel blue — dignified, not garish */
  --navy-2:#29425B;
  --navy-soft:#E6EBF1;
  --brass:#A9792B;        /* brass / gold accent */
  --brass-2:#8A5F18;
  --brass-soft:#F1E2C4;
  --teal:#2E6B5C;         /* correct / success */
  --teal-soft:#DCEAE5;
  --burgundy:#8C2B2B;     /* exam trap / wrong */
  --burgundy-soft:#F1DDD9;
  --blue:#355E8C;         /* info */
  --blue-soft:#DEE7F0;

  --r:7px; --r-sm:4px; --r-lg:10px;
  --shadow:0 1px 0 var(--rule), 0 6px 16px rgba(40,32,18,.07);
  --shadow-soft:0 1px 2px rgba(40,32,18,.06);
  /* --serif is retired: owner wants IBM Plex Sans across the board (no serif). Aliased to the sans stack so every var(--serif) usage cascades cleanly. */
  --serif:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --sans:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15.5px;line-height:1.62;-webkit-font-smoothing:antialiased;min-height:100vh}

/* ---------- topographic contour backdrop (soft IBM-blue × AIX-green) ---------- */
.contour{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.6;overflow:hidden}
.contour svg{width:100%;height:100%;display:block}
.topo-drift{transform-box:fill-box;transform-origin:center;animation:topo-drift 120s ease-in-out infinite}
@keyframes topo-drift{0%{transform:translate(0,0) scale(1)}50%{transform:translate(22px,-14px) scale(1.03)}100%{transform:translate(0,0) scale(1)}}
@media (prefers-reduced-motion: reduce){.topo-drift{animation:none}}
#app{position:relative;z-index:1}   /* lift content above the fixed backdrop */
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;color:var(--navy-2);line-height:1.22;letter-spacing:-.005em}

/* ---------- letterhead top bar ---------- */
#topbar{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;gap:12px;
  padding:11px 18px;background:var(--card);
  border-bottom:3px double var(--navy);   /* mid-century letterhead rule */
}
.brand{display:flex;align-items:center;gap:10px}
.brand .logo{
  width:32px;height:32px;border-radius:7px;
  background:#2F8F6B;                       /* favicon green — matches site icon */
  display:grid;place-items:center;
  box-shadow:0 1px 2px rgba(0,0,0,.18);
}
.brand .logo::before{                       /* white "A" — IBM Plex Sans bold, like the favicon */
  content:"A";font-family:var(--sans);font-weight:700;font-size:19px;line-height:1;color:#fff;
}
.brand .name{font-family:var(--serif);font-weight:600;font-size:18px;letter-spacing:.06em;color:var(--navy-2);line-height:1}
.brand small{display:block;font-family:var(--sans);font-weight:500;font-size:10px;color:var(--ink-3);letter-spacing:.18em;text-transform:uppercase;margin-top:3px}
.spacer{flex:1}
.stat{display:inline-flex;align-items:baseline;gap:5px;padding:5px 10px;border:1px solid var(--rule-2);background:var(--card)}
.stat .lbl{font-family:var(--sans);font-weight:600;font-size:9px;letter-spacing:.16em;color:var(--ink-3);text-transform:uppercase}
.stat .val{font-family:var(--serif);font-weight:600;font-size:15px;color:var(--brass-2)}
.stat[data-kind=heart] .val{color:var(--burgundy)}
.stat[data-kind=streak] .val{color:var(--burgundy)}
.stat.zero .val{color:var(--ink-3)}

/* ---------- layout ---------- */
#app{max-width:680px;margin:0 auto;padding:22px 18px 110px}
.view-head{margin:4px 2px 18px;padding-bottom:14px;border-bottom:1px solid var(--rule)}
.view-head h1{font-size:25px;margin:0 0 4px}
.view-head p{margin:0;color:var(--ink-2);font-size:13.5px}
.eyebrow{font-family:var(--sans);font-weight:600;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--brass-2);margin-bottom:4px;display:block}

/* ---------- unit banner (corporate file-tab style) ---------- */
.unit{margin:30px 0 8px}
.unit-banner{display:flex;align-items:center;gap:14px;padding:14px 16px;background:var(--navy-soft);color:#fff;box-shadow:var(--shadow);position:relative;border:1px solid var(--rule)}
.unit-banner::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--brass)}
.unit-banner h2{color:#fff;margin:0;font-size:17px;font-family:var(--serif)}
.unit-banner p{margin:3px 0 0;color:rgba(255,255,255,.85);font-size:11.5px;letter-spacing:.04em;text-transform:uppercase}
.unit-banner .pct{margin-left:auto;font-family:var(--serif);font-weight:600;font-size:19px;color:var(--navy-2);border:1px solid rgba(255,255,255,.55);padding:3px 12px;background:rgba(255,255,255,.94)}

/* ---------- lesson path: clean filing-list timeline (no overlap) ---------- */
.path{display:flex;flex-direction:column;gap:7px;padding:14px 2px 6px;position:relative}
.lrow{
  display:flex;align-items:center;gap:13px;padding:10px 12px;border:1px solid var(--rule);
  background:var(--card);border-radius:var(--r-sm);cursor:pointer;transition:transform .12s,box-shadow .12s,border-color .12s;
}
.lrow:hover:not(.locked){border-color:var(--navy);box-shadow:var(--shadow-soft);transform:translateX(2px)}
.lrow.locked{opacity:.5;cursor:not-allowed;background:var(--paper-2)}
.lrow.done{border-left:4px solid var(--teal)}
.lrow.current{border-color:var(--brass);border-left:4px solid var(--brass);background:var(--brass-soft)}
.lnode{
  flex:none;width:38px;height:38px;border-radius:50%;border:2px solid var(--navy);
  display:grid;place-items:center;background:var(--card);color:var(--navy-2);
  font-family:var(--serif);font-weight:600;font-size:15px;
}
.lrow.done .lnode{background:var(--teal);border-color:var(--teal);color:#fff}
.lrow.current .lnode{background:var(--brass);border-color:var(--brass-2);color:#fff;animation:pulse 2.6s ease-in-out infinite}
.lrow.locked .lnode{background:var(--paper-2);border-color:var(--rule);color:var(--ink-3)}
.lmeta{flex:1;min-width:0}
.ltitle{font-family:var(--serif);font-weight:600;font-size:15.5px;color:var(--navy-2);line-height:1.2}
.lsub{font-size:11.5px;color:var(--ink-3);margin-top:2px;letter-spacing:.01em}
.lstat{font-family:var(--sans);font-weight:600;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);text-align:right;white-space:nowrap;flex:none}
.lrow.done .lstat{color:var(--teal)}
.lrow.current .lstat{color:var(--brass-2)}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(169,121,43,.35)}50%{box-shadow:0 0 0 8px rgba(169,121,43,0)}}

/* ---------- buttons ---------- */
.btn{font-family:var(--sans);font-weight:700;font-size:13px;letter-spacing:.1em;text-transform:uppercase;
  border:1px solid var(--navy-2);border-radius:var(--r-sm);padding:13px 20px;cursor:pointer;
  background:var(--navy);color:#F6F0E4;box-shadow:0 2px 0 var(--navy-2);transition:all .1s;width:100%}
.btn:hover{background:var(--navy-2)}
.btn:active{transform:translateY(2px);box-shadow:0 0 0 var(--navy-2)}
.btn:disabled{background:var(--paper-2);color:var(--ink-3);border-color:var(--rule);box-shadow:none;cursor:not-allowed}
.btn.secondary{background:var(--card);color:var(--navy-2);box-shadow:none}
.btn.secondary:hover{background:var(--navy-soft)}
.btn.ghost{background:transparent;color:var(--ink-2);border-color:transparent;box-shadow:none;letter-spacing:0;text-transform:none}
.btn.danger{background:var(--burgundy);border-color:#6e2121;box-shadow:0 2px 0 #6e2121;color:#fff}

/* ---------- lesson step ---------- */
.step{background:var(--card);border:1px solid var(--rule);border-radius:var(--r);padding:24px 22px;box-shadow:var(--shadow);animation:pop .22s ease}
@keyframes pop{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.step .progress{display:flex;gap:4px;margin-bottom:20px}
.step .progress i{flex:1;height:5px;border-radius:2px;background:var(--paper-2);display:block}
.step .progress i.on{background:var(--navy)}
.step .progress i.err{background:var(--burgundy)}

.teach h2{font-size:21px;margin:0 0 10px}
.teach h3{font-size:15px;margin:18px 0 6px;color:var(--navy)}
.teach p{margin:0 0 13px;color:var(--ink)}
.teach ul{margin:0 0 13px;padding-left:20px}
.teach li{margin:0 0 6px}
.teach .hook{font-family:var(--serif);font-size:16.5px;font-style:italic;color:var(--navy-2);border-left:3px solid var(--brass);padding:4px 0 4px 14px;margin:0 0 18px}

/* table */
.tbl{width:100%;border-collapse:collapse;margin:6px 0 16px;font-size:13px;border:1px solid var(--rule-2)}
.tbl caption{caption-side:top;text-align:left;font-family:var(--sans);font-weight:600;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--brass-2);padding:4px 2px}
.tbl th{background:var(--navy);color:#F6F0E4;text-align:left;padding:8px 10px;font-weight:600;font-size:12px;letter-spacing:.03em}
.tbl td{padding:8px 10px;border-top:1px solid var(--rule);vertical-align:top}
.tbl tr:nth-child(even) td{background:var(--card-2)}
.tbl code{font-family:var(--mono);font-size:12px;background:var(--paper-2);padding:1px 5px;border-radius:3px}

/* terminal — light typewriter/printer paper (no dark bg) */
.term{background:#FFFDF7;border:1px solid var(--rule-2);border-radius:var(--r-sm);margin:6px 0 16px;box-shadow:var(--shadow-soft);overflow:hidden}
.term .bar{display:flex;align-items:center;gap:7px;padding:6px 12px;background:var(--navy-2);color:#C9D4E1}
.term .bar .dots{display:flex;gap:4px}
.term .bar .dots i{width:8px;height:8px;border-radius:50%;background:#3A5A82}
.term .bar .t{margin-left:6px;font-family:var(--mono);font-size:11px;color:#AEC0D4;letter-spacing:.04em}
.term pre{margin:0;padding:14px 16px;overflow-x:auto;font-family:var(--mono);font-size:12.5px;line-height:1.65;color:var(--ink);background:#FFFDF7}
.term .c{color:var(--navy-2);font-weight:600}
.term .o{color:var(--ink-2)}
.term .x{color:var(--brass-2);font-weight:600}
.term .m{color:var(--teal)}
.term .e{color:var(--burgundy);font-weight:600}

/* callouts */
.callout{border-radius:var(--r-sm);padding:13px 16px;margin:8px 0 16px;border-left:4px solid var(--blue);background:var(--blue-soft)}
.callout .ttl{font-family:var(--sans);font-weight:700;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;display:flex;align-items:center;gap:7px;margin-bottom:6px;color:var(--blue)}
.callout p{margin:0;font-size:14px;line-height:1.55}
.callout.tip{border-color:var(--teal);background:var(--teal-soft)}.callout.tip .ttl{color:var(--teal)}
.callout.info{border-color:var(--blue);background:var(--blue-soft)}.callout.info .ttl{color:var(--blue)}
.callout.warning{border-color:var(--brass);background:var(--brass-soft)}.callout.warning .ttl{color:var(--brass-2)}
.callout.examtrap{border-color:var(--burgundy);background:var(--burgundy-soft)}.callout.examtrap .ttl{color:var(--burgundy)}
.callout code{font-family:var(--mono);font-size:12px;background:rgba(255,255,255,.55);padding:1px 5px;border-radius:3px}

/* ---------- quiz ---------- */
.q .prompt{font-family:var(--serif);font-size:18px;font-weight:600;margin:4px 0 18px;color:var(--ink)}
.opt{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r-sm);padding:13px 15px;margin-bottom:9px;cursor:pointer;font-size:14.5px;font-family:var(--sans);color:var(--ink);transition:all .12s}
.opt:hover:not(.locked){border-color:var(--navy);background:#fff}
.opt.sel{border-color:var(--navy);background:var(--navy-soft)}
.opt.correct{border-color:var(--teal);background:var(--teal-soft)}
.opt.wrong{border-color:var(--burgundy);background:var(--burgundy-soft)}
.opt .kbd{width:28px;height:28px;border-radius:var(--r-sm);background:var(--paper-2);border:1px solid var(--rule-2);display:grid;place-items:center;font-family:var(--serif);font-weight:600;font-size:13px;color:var(--navy-2);flex:none}
.opt.correct .kbd{background:var(--teal);color:#fff;border-color:var(--teal)}
.opt.wrong .kbd{background:var(--burgundy);color:#fff;border-color:var(--burgundy)}
.txtin{width:100%;font-family:var(--mono);font-size:14.5px;padding:12px 14px;border:1px solid var(--rule-2);border-radius:var(--r-sm);background:#FFFDF7;color:var(--ink);outline:none}
.txtin:focus{border-color:var(--navy)}
.txtin.correct{border-color:var(--teal);background:var(--teal-soft)}
.txtin.wrong{border-color:var(--burgundy);background:var(--burgundy-soft)}
.feedback{border-radius:var(--r-sm);padding:13px 15px;margin-bottom:14px;border-left:4px solid;display:none}
.feedback.show{display:block;animation:pop .18s ease}
.feedback.ok{background:var(--teal-soft);border-color:var(--teal)}
.feedback.no{background:var(--burgundy-soft);border-color:var(--burgundy)}
.feedback .h{font-family:var(--sans);font-weight:700;font-size:11px;letter-spacing:.12em;text-transform:uppercase;display:flex;align-items:center;gap:8px;margin-bottom:6px}
.feedback.ok .h{color:var(--teal)}
.feedback.no .h{color:var(--burgundy)}
.feedback p{margin:0;font-size:13.5px;color:var(--ink)}
.feedback code{font-family:var(--mono);font-size:12.5px;background:rgba(255,255,255,.5);padding:1px 5px;border-radius:3px}
.step-foot{display:flex;gap:10px;margin-top:18px}

/* completion */
.complete{text-align:center;padding:30px 22px}
.complete .ring{width:84px;height:84px;border-radius:50%;margin:0 auto 14px;background:var(--navy);display:grid;place-items:center;font-size:38px;box-shadow:var(--shadow);animation:pop .35s ease}
.complete h1{font-size:25px;margin:0 0 6px}
.complete .sub{color:var(--ink-2);margin:0 0 20px;font-family:var(--serif)}
.gains{display:flex;justify-content:center;gap:10px;margin-bottom:20px;flex-wrap:wrap}
.gain{background:var(--card);border:1px solid var(--rule-2);padding:11px 15px;display:flex;align-items:baseline;gap:7px;font-family:var(--serif);font-weight:600;box-shadow:var(--shadow-soft)}
.gain .n{font-size:18px;color:var(--brass-2)}
.gain .u{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);font-family:var(--sans);font-weight:600}

/* profile badges */
.badge{display:flex;align-items:center;gap:13px;padding:13px 14px;border:1px solid var(--rule);background:var(--card);margin-bottom:9px}
.badge .ic{width:42px;height:42px;border-radius:var(--r-sm);display:grid;place-items:center;font-size:20px;background:var(--navy-soft);border:1px solid var(--rule-2);flex:none}
.badge.locked{opacity:.5}
.badge.locked .ic{filter:grayscale(1)}
.badge .t{font-family:var(--serif);font-weight:600;font-size:14.5px;color:var(--navy-2)}
.badge .d{font-size:12.5px;color:var(--ink-2)}

/* bottom tab bar — accommodates up to 6 tabs, horizontal-scrolls on narrow screens */
#tabbar{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;gap:6px;background:var(--card);border-top:3px double var(--navy);padding:8px;z-index:40;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
#tabbar::-webkit-scrollbar{display:none}
#tabbar button{flex:0 1 1px;min-width:64px;font-family:var(--sans);font-weight:700;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;background:transparent;border:none;color:var(--ink-3);padding:9px 10px;border-radius:var(--r-sm);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:3px;transition:color .12s,background .12s,box-shadow .12s}
#tabbar button.on{color:var(--navy-2);background:var(--navy-soft);box-shadow:inset 0 3px 0 0 var(--brass)}
#tabbar button .em{font-size:16px}

.banner{background:var(--blue-soft);border:1px solid #BfCfde;border-left:4px solid var(--blue);color:#2a4660;border-radius:var(--r-sm);padding:11px 14px;font-size:13px;margin:16px 0}
.banner.gold{background:var(--brass-soft);border-color:#e0c896;border-left-color:var(--brass);color:#6e4d12}
.muted{color:var(--ink-3);font-size:12.5px}
.kbd-inline{font-family:var(--mono);font-size:12px;background:var(--paper-2);padding:1px 6px;border-radius:3px;border:1px solid var(--rule)}
a{color:var(--blue)}

.confetti{position:fixed;inset:0;pointer-events:none;z-index:60;overflow:hidden}
.confetti i{position:absolute;top:-12px;width:7px;height:12px;opacity:.85;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(540deg);opacity:0}}

/* ---------- rank chip (header) ---------- */
.rank{display:flex;align-items:center;gap:8px;padding:5px 11px;border:1px solid var(--brass-2);background:var(--brass-soft);border-radius:var(--r-sm);cursor:default}
.rank .ic{font-size:14px;line-height:1}
.rank .rt{font-family:var(--serif);font-weight:600;font-size:11px;color:var(--brass-2);letter-spacing:.03em;line-height:1.1;text-align:left}
.rank .rt small{display:block;font-family:var(--sans);font-weight:500;font-size:8.5px;color:var(--ink-3);letter-spacing:.1em;text-transform:uppercase;margin-top:1px}

/* ---------- rank progress card (home top) ---------- */
.rankcard{display:flex;align-items:center;gap:14px;padding:14px 16px;background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#F6F0E4;border-radius:var(--r);box-shadow:var(--shadow);margin-bottom:16px;position:relative;overflow:hidden}
.rankcard::after{content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;border-radius:50%;background:rgba(169,121,43,.16)}
.rankcard .ric{flex:none;width:48px;height:48px;border-radius:50%;background:var(--brass);display:grid;place-items:center;font-size:24px;box-shadow:0 2px 6px rgba(0,0,0,.25);z-index:1}
.rankcard .rbody{flex:1;min-width:0;z-index:1}
.rankcard .rname{font-family:var(--serif);font-weight:600;font-size:16px;color:#fff;line-height:1.1}
.rankcard .rnext{font-size:11.5px;color:#C9D4E1;margin-top:2px}
.rankcard .rbar{height:6px;border-radius:3px;background:rgba(255,255,255,.16);margin-top:8px;overflow:hidden}
.rankcard .rbar i{display:block;height:100%;background:linear-gradient(90deg,var(--brass),#E0B45E);transition:width .5s}

/* ---------- daily challenge ---------- */
.daily{display:flex;align-items:center;gap:14px;padding:14px 16px;background:var(--card);border:1px solid var(--brass-2);border-left:4px solid var(--brass);border-radius:var(--r);margin-bottom:16px;box-shadow:var(--shadow-soft)}
.daily.done{border-color:var(--teal);border-left-color:var(--teal);background:var(--teal-soft)}
.daily .dic{flex:none;width:44px;height:44px;border-radius:var(--r-sm);background:var(--brass-soft);display:grid;place-items:center;font-size:22px}
.daily.done .dic{background:#fff}
.daily .dbody{flex:1}
.daily .dttl{font-family:var(--serif);font-weight:600;font-size:15px;color:var(--navy-2)}
.daily .dsub{font-size:12px;color:var(--ink-2);margin-top:1px}
.daily .btn{width:auto;flex:none;padding:10px 16px}

/* ---------- reference (cheatsheet + glossary) ---------- */
.refsearch{position:sticky;top:64px;z-index:20;display:flex;gap:8px;margin-bottom:12px}
.refsearch input{flex:1;font-family:var(--mono);font-size:14px;padding:11px 14px;border:1px solid var(--rule-2);border-radius:var(--r-sm);background:var(--card);color:var(--ink);outline:none}
.refsearch input:focus{border-color:var(--navy)}
.refsearch input::placeholder{color:var(--ink-3)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.chip{font-family:var(--sans);font-weight:600;font-size:11px;letter-spacing:.04em;padding:6px 11px;border:1px solid var(--rule-2);background:var(--card);color:var(--ink-2);border-radius:999px;cursor:pointer;transition:all .1s}
.chip:hover{border-color:var(--navy)}
.chip.on{background:var(--navy);color:#F6F0E4;border-color:var(--navy)}
.reftoggle{display:flex;gap:0;margin-bottom:14px;border:1px solid var(--rule-2);border-radius:var(--r-sm);overflow:hidden}
.reftoggle button{flex:1;font-family:var(--sans);font-weight:700;font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:11px;background:var(--card);border:none;color:var(--ink-2);cursor:pointer;border-right:1px solid var(--rule-2)}
.reftoggle button:last-child{border-right:none}
.reftoggle button.on{background:var(--navy);color:#F6F0E4}
.cmdcat{font-family:var(--sans);font-weight:700;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--brass-2);margin:18px 0 7px;padding-bottom:4px;border-bottom:1px solid var(--rule)}
.cmdcard{border:1px solid var(--rule);border-left:3px solid var(--navy);background:var(--card);border-radius:var(--r-sm);padding:10px 13px;margin-bottom:8px}
.cmdcard .ch{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.cmdcard .cn{font-family:var(--mono);font-weight:600;font-size:13.5px;color:var(--navy-2)}
.cmdcard .cd{font-size:13px;color:var(--ink-2);margin:4px 0 0;line-height:1.5}
.cmdcard .ce{font-family:var(--mono);font-size:11.5px;color:var(--teal);background:var(--paper-2);border:1px solid var(--rule);border-radius:3px;padding:5px 8px;margin-top:6px;display:inline-block;white-space:pre-wrap;max-width:100%;overflow-x:auto}
.glossaryitem{border-bottom:1px solid var(--rule);padding:10px 2px}
.glossaryitem .gt{font-family:var(--serif);font-weight:600;font-size:14.5px;color:var(--navy-2)}
.glossaryitem .gx{font-family:var(--sans);font-weight:500;font-size:11px;color:var(--brass-2);letter-spacing:.02em;display:block;margin-top:1px}
.glossaryitem .gd{font-size:13px;color:var(--ink-2);margin-top:3px;line-height:1.5}
.refcount{font-family:var(--sans);font-size:11.5px;color:var(--ink-3);margin-bottom:10px}
.empty{padding:30px 10px;text-align:center;color:var(--ink-3);font-size:13px}

/* ---------- exam mode ---------- */
.exam-h{font-family:var(--sans);font-weight:700;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--brass-2);margin:18px 0 9px}
.lenbtns{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:6px}
.lenbtn{font-family:var(--sans);font-weight:600;background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r-sm);padding:13px 8px;cursor:pointer;display:flex;flex-direction:column;gap:2px;align-items:center;color:var(--ink-2);transition:all .12s}
.lenbtn:hover{border-color:var(--navy)}
.lenbtn.on{background:var(--navy);border-color:var(--navy);color:#F6F0E4}
.lenbtn b{font-size:13px;letter-spacing:.02em}
.lenbtn span{font-size:10.5px;color:var(--ink-3);letter-spacing:.02em}
.lenbtn.on span{color:#C9D4E1}
.dombreakdown{margin-top:6px}
.dombreak{display:grid;grid-template-columns:1fr auto;gap:4px 10px;align-items:center;padding:8px 0;border-bottom:1px solid var(--rule)}
.dombreak .dname{font-size:12.5px;color:var(--ink-2);grid-column:1}
.dombreak .dbar{grid-column:1;height:6px;background:var(--paper-2);border-radius:3px;overflow:hidden}
.dombreak .dbar i{display:block;height:100%}
.dombreak .dpct{grid-column:2;grid-row:1/3;font-family:var(--serif);font-weight:600;font-size:13px;color:var(--navy-2)}

/* ---------- responsive ---------- */
@media (max-width:560px){
  body{font-size:15px}
  #topbar{padding:9px 12px;gap:8px}
  .brand .name{font-size:16px}
  .brand small{font-size:9px;letter-spacing:.14em}
  .brand .logo{width:28px;height:28px}
  .brand .logo::before{font-size:17px}
  .stat{padding:4px 8px}
  .stat .lbl{display:none}              /* compact: value only on mobile */
  .stat .val{font-size:14px}
  .rank{padding:4px 8px;gap:5px}
  .rank .rt{font-size:10px}
  .rank .rt small{font-size:8px}
  #tabbar button{font-size:9.5px;padding:8px 6px}
  #tabbar button .em{font-size:15px}
  #app{padding:16px 13px 110px}
  .view-head h1{font-size:22px}
  .unit-banner h2{font-size:15px}
  .refsearch{top:58px}
  .ltitle{font-size:14.5px}
}
@media (max-width:380px){
  .rank .rt{display:none}               /* icon-only rank on tiny phones */
  #topbar{gap:6px;padding:8px 10px}
}

/* =============================================================================
   v1.1 additions — toast stack, animations, SRS hub, About view
   ========================================================================== */

/* ---------- toast stack (replaces single-toast) ---------- */
.toast{
  position:fixed;left:50%;transform:translateX(-50%);top:84px;
  z-index:80;background:var(--card);border:1px solid var(--brass-2);
  border-left:4px solid var(--brass);border-radius:var(--r);
  padding:13px 22px;box-shadow:var(--shadow);
  font-family:var(--serif);font-weight:600;text-align:center;
  min-width:180px;transition:top .22s ease,opacity .2s ease,transform .2s ease;
  animation:toast-in .32s cubic-bezier(.2,.9,.3,1.3);
}
.toast .ti{font-size:30px;line-height:1.1}
.toast .th{color:var(--brass-2);font-family:var(--sans);font-weight:700;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;margin-top:2px}
.toast .tn{color:var(--navy-2);font-size:16px;margin-top:2px}
.toast.rankup{border-left-color:var(--navy);background:linear-gradient(180deg,var(--card),var(--brass-soft))}
.toast.out{opacity:0;transform:translateX(-50%) translateY(-8px) scale(.96)}
@keyframes toast-in{
  from{opacity:0;transform:translateX(-50%) translateY(-10px) scale(.9)}
  to{opacity:1;transform:translateX(-50%) translateY(0) scale(1)}
}

/* ---------- view/step enter transition (mountView) ---------- */
#app > *{animation:view-enter .22s ease}
@keyframes view-enter{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- XP chip pulse + heart shake ---------- */
.stat{transition:box-shadow .15s}
.stat.pulse{animation:xp-pulse .42s ease}
@keyframes xp-pulse{0%{box-shadow:0 0 0 0 rgba(169,121,43,.5)}40%{box-shadow:0 0 0 6px rgba(169,121,43,0)}100%{box-shadow:0 0 0 0 rgba(169,121,43,0)}}
.stat[data-kind="heart"].shake{animation:heart-shake .46s ease}
@keyframes heart-shake{
  0%,100%{transform:translateX(0)}
  15%{transform:translateX(-4px);background:var(--burgundy-soft)}
  30%{transform:translateX(4px);background:var(--burgundy-soft)}
  45%{transform:translateX(-3px)}
  60%{transform:translateX(3px)}
  75%{transform:translateX(-1px)}
}

/* ---------- option button press + reveal polish ---------- */
.opt{transition:transform .1s,background .12s,border-color .12s}
.opt:active:not(.locked){transform:scale(.98)}
.opt.correct{animation:pop .22s ease}
.opt.wrong{animation:opt-shake .34s ease}
@keyframes opt-shake{
  0%,100%{transform:translateX(0)}
  25%{transform:translateX(-3px)}
  50%{transform:translateX(3px)}
  75%{transform:translateX(-2px)}
}

/* ---------- progress bars + ring scale-in ---------- */
.rbar i,.dombreak .dbar i{transition:width .5s ease}
.complete .ring{animation:ring-pop .42s cubic-bezier(.2,.9,.3,1.4)}
@keyframes ring-pop{from{opacity:0;transform:scale(.6)}to{opacity:1;transform:scale(1)}}

/* ---------- PRACTICE hub cards ---------- */
.hubcard{
  display:flex;align-items:center;gap:14px;padding:16px 18px;
  background:var(--card);border:1px solid var(--rule);border-left:4px solid var(--navy);
  border-radius:var(--r);margin-bottom:12px;box-shadow:var(--shadow-soft);
  cursor:pointer;transition:transform .12s,box-shadow .12s,border-color .12s;
}
.hubcard:hover{transform:translateY(-1px);box-shadow:var(--shadow);border-color:var(--navy-2)}
.hubcard.idle{border-left-color:var(--rule-2)}
.hubcard.weak{border-left-color:var(--burgundy)}
.hubcard:focus-visible{outline:2px solid var(--navy);outline-offset:2px}
.hubic{flex:none;width:46px;height:46px;border-radius:var(--r-sm);background:var(--paper-2);
  display:grid;place-items:center;font-size:22px;border:1px solid var(--rule-2)}
.hubcard.weak .hubic{background:var(--burgundy-soft)}
.hubbody{flex:1;min-width:0}
.hubt{font-family:var(--serif);font-weight:600;font-size:16px;color:var(--navy-2)}
.hubd{font-size:13px;color:var(--ink-2);margin-top:2px;line-height:1.45}
.hubmeta{font-family:var(--sans);font-weight:600;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-top:5px}
.hubbar{height:5px;border-radius:3px;background:var(--paper-2);margin-top:6px;overflow:hidden}
.hubbar i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--brass));transition:width .5s}
.hubcta{flex:none;font-family:var(--sans);font-weight:700;font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--navy-2);align-self:center;white-space:nowrap}

/* ---------- SRS typing drill ---------- */
.step.srs .srs-prompt{font-family:var(--serif);font-size:17px;font-weight:600;color:var(--ink);margin:6px 0 16px;line-height:1.45}
.step.srs .srs-input{font-size:15px}
.srs-reveal{margin-top:8px;padding-top:6px;border-top:1px dashed var(--rule)}
.srs-reveal code{font-family:var(--mono);font-size:12px;background:var(--paper-2);padding:3px 6px;border-radius:3px}

/* ---------- ABOUT view ---------- */
.about-card{background:var(--card);border:1px solid var(--rule);border-radius:var(--r);padding:16px 18px;margin-bottom:14px;box-shadow:var(--shadow-soft)}
.about-card .about-h{font-family:var(--serif);font-weight:600;font-size:16px;color:var(--navy-2);margin:0 0 8px}
.about-card p{margin:0 0 8px;font-size:14px;line-height:1.6;color:var(--ink)}
.about-card p:last-child{margin-bottom:0}
.about-list{margin:0;padding-left:20px}
.about-list li{margin:0 0 7px;font-size:14px;line-height:1.55}

/* ---------- reduced motion: kill all the above animations ---------- */
@media (prefers-reduced-motion: reduce){
  .toast,.toast.out,#app > *,.stat.pulse,.stat[data-kind="heart"].shake,
  .opt.correct,.opt.wrong,.complete .ring,.rbar i,.dombreak .dbar i,
  .hubcard,.topo-drift,.introcard{
    animation:none !important;transition:none !important;
  }
}

/* ---------- v1.2: intro orientation card, figures, citations ---------- */
.introcard{display:flex;align-items:center;gap:14px;padding:15px 17px;background:linear-gradient(135deg,var(--card),var(--brass-soft));border:1px solid var(--brass-2);border-left:4px solid var(--brass);border-radius:var(--r);margin:0 0 22px;box-shadow:var(--shadow-soft);cursor:pointer;transition:transform .12s,box-shadow .12s}
.introcard:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.introcard:focus-visible{outline:2px solid var(--navy);outline-offset:2px}
.intro-ic{flex:none;width:44px;height:44px;border-radius:var(--r-sm);background:var(--card);display:grid;place-items:center;font-size:22px;border:1px solid var(--rule-2)}
.intro-body{flex:1;min-width:0}
.intro-eb{font-family:var(--sans);font-weight:700;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--brass-2)}
.intro-ttl{font-family:var(--sans);font-weight:700;font-size:16px;color:var(--navy-2);margin-top:2px;line-height:1.2}
.intro-sub{font-size:12px;color:var(--ink-2);margin-top:3px;line-height:1.4}
.intro-cta{flex:none;font-family:var(--sans);font-weight:700;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--navy-2);white-space:nowrap;align-self:center}

.figure{margin:12px 0 18px}
.figure svg{width:100%;height:auto;display:block;border-radius:var(--r-sm);box-shadow:var(--shadow-soft)}
.figure figcaption{font-size:11.5px;color:var(--ink-3);margin-top:7px;line-height:1.45;font-family:var(--sans)}

.citations{margin:20px 0 0;padding-top:14px;border-top:1px solid var(--rule);text-align:left}
.citations-h{font-family:var(--sans);font-weight:700;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--brass-2);margin-bottom:10px}
.cite{display:flex;flex-direction:column;gap:1px;padding:7px 0;border-bottom:1px dashed var(--rule)}
.cite:last-child{border-bottom:none}
.cite-claim{font-size:12.5px;color:var(--ink-2);line-height:1.4}
.cite-src{font-family:var(--sans);font-size:10.5px;color:var(--blue);text-decoration:none;margin-top:2px;display:inline-block}
.cite-src:hover{text-decoration:underline}