/* FAMPREP — Digital SAT prep. Mobile-first PWA. Cover palette: navy #14245A + gold #C8A24B. */
:root{
  --navy:#14245A; --navy-deep:#0E1A45; --navy-soft:#1e326f;
  --gold:#C8A24B; --gold-hi:#E0C378; --gold-lo:#A5813A;
  --paper:#f2f4f8; --card:#ffffff; --ink:#141726; --muted:#5d6274; --faint:#9298aa;
  --line:#e2e5ee; --frame:#d6dae6;
  --good:#1c7a53; --good-tint:#e7f3ec; --good-line:#bfe0cd;
  --bad:#b23a2c; --bad-tint:#f8ece9; --bad-line:#e7c9c2;
  --sans:"Helvetica Neue",Helvetica,-apple-system,system-ui,Arial,sans-serif;
  --serif:"Palatino Linotype","Book Antiqua",Palatino,"Iowan Old Style",Georgia,serif;
  --sat:env(safe-area-inset-top,0px); --sab:env(safe-area-inset-bottom,0px);
  --tabh:62px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
html{overflow-x:hidden}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);width:100%;max-width:100%;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overscroll-behavior-y:none}
/* let flex text wrap instead of forcing horizontal overflow */
.cta .row>div,.opt .txt,.aline>div,.prow .nm,.bbhead .mark{min-width:0;overflow-wrap:anywhere}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
#app{min-height:100%;padding-bottom:calc(var(--tabh) + var(--sab))}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:20;background:var(--navy);color:#fff;
  padding:calc(var(--sat) + 12px) 18px 12px;display:flex;align-items:center;gap:12px}
.topbar.deep{background:var(--navy-deep)}
.topbar .back{font-size:22px;line-height:1;width:30px;margin-left:-6px}
.topbar h1{font-size:17px;font-weight:800;letter-spacing:.02em;margin:0;flex:1}
.topbar .right{font-size:12.5px;color:#cdd4e6;font-weight:600;font-variant-numeric:tabular-nums}
.brandmark{width:26px;height:26px;flex:0 0 auto}

.screen{padding:18px 18px 26px;max-width:640px;margin:0 auto;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.screen,#app *{animation:none!important}}

/* ---------- home ---------- */
.hero{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;padding:24px 0 10px}
.hero .icon{width:96px;height:96px;filter:drop-shadow(0 10px 22px rgba(14,26,69,.32))}
.hero .icon svg,.brandmark svg{width:100%;height:100%;display:block}
.hero h2{font-size:26px;font-weight:800;letter-spacing:.02em;margin:8px 0 0}
.hero h2 .g{color:var(--gold-lo)}
.hero .tag{font-family:var(--serif);font-style:italic;color:var(--muted);font-size:15.5px;max-width:34ch}
.pill{display:inline-flex;align-items:center;gap:7px;font-size:11.5px;font-weight:700;letter-spacing:.05em;
  text-transform:uppercase;color:var(--gold-lo);background:#fbf6ea;border:1px solid #ecdcb6;border-radius:999px;padding:5px 12px}

.cta{display:block;width:100%;border-radius:14px;padding:16px 18px;margin-top:14px;text-align:left;
  font-size:16px;font-weight:700;box-shadow:0 6px 18px -10px rgba(14,26,69,.5);transition:transform .12s ease}
.cta:active{transform:scale(.985)}
.cta.primary{background:linear-gradient(135deg,var(--gold-hi),var(--gold-lo));color:#3a2c08}
.cta.navy{background:var(--navy);color:#fff}
.cta.ghost{background:var(--card);color:var(--ink);border:1px solid var(--frame);box-shadow:none}
.cta .sub{display:block;font-size:13px;font-weight:500;opacity:.82;margin-top:3px}
.cta .row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.cta .chev{font-size:20px;opacity:.7}

.statgrid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-top:18px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 10px;text-align:center}
.stat b{display:block;font-size:22px;font-weight:800;color:var(--navy);font-variant-numeric:tabular-nums}
.stat span{font-size:11px;color:var(--muted);letter-spacing:.02em}
.note{font-size:12.5px;color:var(--muted);background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);
  border-radius:8px;padding:11px 13px;margin-top:16px;line-height:1.5}
.note b{color:var(--ink)}

/* ---------- Bluebook question card ---------- */
.qwrap{max-width:640px;margin:0 auto}
.progress{height:6px;background:#e4e7f0;border-radius:99px;overflow:hidden;margin:2px 0 16px}
.progress > i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--gold-lo));border-radius:99px;transition:width .3s ease}
.metarow{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:10px}
.tier{font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#fff;border-radius:5px;padding:3px 8px}
.tier.easy{background:#4f7d8f}.tier.medium{background:#3f6f8f}.tier.hard{background:#9a5a2a}.tier.s1500{background:#6b3f7a}
.mchip{font-size:11px;color:var(--muted);background:#eaedf4;border:1px solid var(--line);border-radius:5px;padding:2px 8px}

.bb{background:var(--card);border:1px solid var(--frame);border-radius:12px;padding:15px 15px 17px;
  box-shadow:0 2px 0 rgba(20,36,90,.03),0 10px 26px -20px rgba(20,36,90,.5)}
.bbhead{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--ink);font-weight:600}
.qnum{background:var(--ink);color:#fff;font-weight:700;min-width:24px;height:24px;padding:0 5px;border-radius:5px;
  display:flex;align-items:center;justify-content:center;font-size:13px}
.mark{display:flex;align-items:center;gap:4px;color:#555;font-weight:500}
.abc{margin-left:auto;font-weight:700;font-size:10.5px;color:#fff;background:#3a3733;border-radius:4px;padding:3px 7px}
.abc s{text-decoration-thickness:1.4px}
.bbrule{height:1px;background:var(--line);margin:10px -15px 13px}

.stim{font-family:var(--serif);font-size:16.5px;line-height:1.55;margin:0 0 13px}
.stim p{margin:0 0 10px}.stim p:last-child{margin-bottom:0}
.stim .src{color:var(--muted);font-style:italic;font-size:14px}
.tlabel{font-family:var(--sans);font-weight:700;font-size:12px;letter-spacing:.03em;margin:6px 0 3px}
.blank{display:inline-block;min-width:52px;border-bottom:2px solid var(--ink);height:.9em;vertical-align:baseline}
.stem{font-size:16.5px;font-weight:600;line-height:1.45;margin:0 0 14px}
.math{font-family:var(--serif);font-style:italic;white-space:nowrap}.math sup{font-style:normal}
.frac{display:inline-flex;flex-direction:column;vertical-align:-.42em;text-align:center;font-size:.82em;line-height:1.05;margin:0 .12em;font-style:normal}
.frac .de{border-top:1px solid currentColor;padding:0 .3em}.frac .nu{padding:0 .3em}
.rad{border-top:1px solid currentColor;padding:0 1px}

.figw{margin:0 0 13px;overflow-x:auto}
.figw svg{max-width:100%;height:auto;display:block;margin:0 auto}
.figtable{border-collapse:collapse;margin:0 auto;font-size:14px;background:#fff}
.figtable th,.figtable td{border:1px solid var(--frame);padding:6px 11px;text-align:center;font-variant-numeric:tabular-nums}
.figtable th{background:#eef1f7;font-weight:700;font-size:13px}
.figcap{font-size:12px;color:var(--muted);font-style:italic;text-align:center;margin-top:6px}

/* options (tap targets) */
.opts{display:flex;flex-direction:column;gap:10px;margin-top:2px}
.opt{display:flex;align-items:flex-start;gap:12px;border:1.5px solid var(--frame);border-radius:11px;
  padding:13px 14px;font-size:16px;background:#fff;text-align:left;transition:border-color .1s,background .1s}
.opt .let{font-weight:700;width:26px;height:26px;flex:0 0 auto;border-radius:50%;border:1.6px solid #b7bccb;
  display:flex;align-items:center;justify-content:center;font-size:13px;color:#4a4f60}
.opt .txt{flex:1;padding-top:2px;line-height:1.4}
.opt.sel{border-color:var(--navy);background:#eef1fb}
.opt.sel .let{border-color:var(--navy);color:var(--navy)}
.opt[disabled]{opacity:1}
.opt.correct{border-color:var(--good-line);background:var(--good-tint)}
.opt.correct .let{border-color:var(--good);color:#fff;background:var(--good)}
.opt.wrong{border-color:var(--bad-line);background:var(--bad-tint)}
.opt.wrong .let{border-color:var(--bad);color:#fff;background:var(--bad)}
.opt .tick{margin-left:auto;font-weight:700;font-size:11px;letter-spacing:.05em;text-transform:uppercase;align-self:center}
.opt.correct .tick{color:var(--good)}.opt.wrong .tick{color:var(--bad)}

/* SPR grid-in */
.spr{margin-top:4px}
.spr input{font-family:var(--sans);font-size:20px;font-weight:700;color:var(--navy);text-align:center;
  width:100%;max-width:260px;padding:13px;border:1.5px solid var(--frame);border-radius:11px;background:#fff}
.spr input:focus{outline:none;border-color:var(--navy)}
.spr .hint{font-size:12px;color:var(--faint);margin-top:6px}

/* action bar under a question */
.qbar{position:sticky;bottom:calc(var(--tabh) + var(--sab));margin:16px -18px -10px;padding:12px 18px calc(12px);
  background:linear-gradient(#f2f4f8cc,#f2f4f8);backdrop-filter:blur(6px)}
.btn{display:block;width:100%;border-radius:12px;padding:15px;font-size:16px;font-weight:700;text-align:center}
.btn.primary{background:linear-gradient(135deg,var(--gold-hi),var(--gold-lo));color:#3a2c08}
.btn.primary[disabled]{background:#e4e7f0;color:#a2a8ba}
.btn.navy{background:var(--navy);color:#fff}

/* explain */
.explain{margin-top:14px;border-radius:12px;padding:15px;border:1px solid var(--line)}
.explain.ok{background:var(--good-tint);border-color:var(--good-line)}
.explain.no{background:var(--bad-tint);border-color:var(--bad-line)}
.explain .verdict{font-size:16px;font-weight:800;margin:0 0 8px;display:flex;align-items:center;gap:8px}
.explain.ok .verdict{color:var(--good)}.explain.no .verdict{color:var(--bad)}
.explain h4{font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin:14px 0 5px;font-weight:800}
.explain p{margin:0 0 6px;font-size:15px;line-height:1.5}
.rat{font-family:var(--serif);font-size:15.5px;line-height:1.55}
.autopsy{margin-top:4px}
.aline{display:flex;gap:10px;margin:8px 0;font-size:14px;align-items:flex-start}
.aline .al{font-weight:700;width:22px;height:22px;flex:0 0 auto;border-radius:50%;font-size:12px;
  display:flex;align-items:center;justify-content:center;border:1.4px solid #cbb2aa;color:var(--bad);background:#f6ece9;position:relative}
.aline .al::after{content:"";position:absolute;left:2px;right:2px;top:50%;height:1.4px;background:var(--bad);transform:rotate(-8deg)}
.aline.you .al{border-color:var(--bad);background:var(--bad);color:#fff}
.aline.you .al::after{background:#fff}
.etype{font-size:10.5px;font-weight:700;letter-spacing:.02em;color:var(--bad);background:#f6ece9;border:1px solid #e7c9c2;
  border-radius:4px;padding:1px 6px;margin-right:6px;white-space:nowrap}
.trip{display:grid;grid-template-columns:1fr;gap:9px;margin-top:14px}
.tri{border:1px solid var(--line);border-radius:9px;padding:10px 12px;background:#fff;font-size:13.5px;line-height:1.45}
.tri .h{font-size:10px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;margin-bottom:3px}
.tri.move .h{color:var(--good)}.tri.trap .h{color:var(--bad)}.tri.keep .h{color:var(--gold-lo)}
.lesson{font-size:12.5px;color:var(--muted);margin-top:12px}
.lesson b{color:var(--ink)}

/* profile */
.pdomain{margin-top:20px}
.pdomain > .dh{display:flex;justify-content:space-between;align-items:baseline;font-weight:800;font-size:15px;
  padding-bottom:7px;border-bottom:1.5px solid var(--navy);color:var(--navy)}
.pdomain > .dh .w{font-size:12px;color:var(--muted);font-weight:600}
.prow{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px solid var(--line)}
.prow .nm{flex:1;font-size:14.5px}
.prow .nm small{display:block;color:var(--faint);font-size:11.5px;margin-top:2px}
.meter{width:92px;height:8px;border-radius:99px;background:#e6e9f1;overflow:hidden;flex:0 0 auto}
.meter > i{display:block;height:100%;border-radius:99px}
.lvl{font-size:11px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;width:66px;text-align:right;flex:0 0 auto}
.lvl.none{color:var(--good)}.lvl.low{color:#7a8a2f}.lvl.med{color:#b07a2a}.lvl.high{color:var(--bad)}
.prow .go{font-size:20px;color:var(--gold-lo);flex:0 0 auto}

/* results */
.result{text-align:center;padding:22px 0 6px}
.bigband{font-size:44px;font-weight:800;color:var(--navy);letter-spacing:-.01em}
.result .lab{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:700}
.result .approx{font-size:12.5px;color:var(--muted);margin-top:8px;max-width:34ch;margin-left:auto;margin-right:auto}

/* empty / info */
.empty{text-align:center;color:var(--muted);padding:40px 20px;font-size:15px}

/* ---------- bottom tab bar ---------- */
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:30;height:calc(var(--tabh) + var(--sab));
  padding-bottom:var(--sab);background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr)}
.tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10.5px;color:var(--faint);font-weight:600}
.tab.active{color:var(--navy)}
.tab .ti{width:22px;height:22px;display:block}
.tab.active .ti path,.tab.active .ti circle,.tab.active .ti rect{stroke:var(--navy)}