/* ============================================================
   FIELDSTONE ACADEMY — the mathematics & physics department
   for your homeschool.
   Design language: mathematics, hand-drawn on good paper —
   graph-paper grounds, ink-blue linework, pencil margin notes,
   geometry sketching itself in. Minimal, serious, warm.
   Palette:  paper #FBFAF6 · soft #F3F1E9 · ink #21252D
             ink-blue #27498F · deep #1B3468 · pencil #8B8F98
             marigold #DFA23B · correct #3E7C4F · amiss #B04A3A
   Type:     STIX Two Text (display & math) · Public Sans (body/UI)
             Caveat (pencil annotations, sparingly)
   ============================================================ */

:root{
  --paper:#FBFAF6; --paper2:#F3F1E9; --white:#FFFFFF;
  --ink:#21252D; --ink2:#3C4250; --mut:#6B7080; --mut2:#9CA1AC;
  --blue:#27498F; --blue-deep:#1B3468; --blue-soft:#DDE5F3;
  --gold:#DFA23B; --good:#3E7C4F; --bad:#B04A3A;
  --grid:rgba(39,73,143,.09); --line:rgba(33,37,45,.5); --line2:rgba(33,37,45,.12);
  --stx:"STIX Two Text",Georgia,serif;
  --ps:"Public Sans","Helvetica Neue",Arial,sans-serif;
  --cav:"Caveat",cursive;
  --shadow:0 16px 40px -26px rgba(27,52,104,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);
  font:400 17px/1.7 var(--ps);-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
::selection{background:rgba(223,162,59,.3)}

.wrap{max-width:1100px;margin:0 auto;padding:0 28px}
.wrap-n{max-width:820px;margin:0 auto;padding:0 28px}
.center{text-align:center}

h1,h2,h3,h4{font-family:var(--stx);font-weight:600;line-height:1.15;letter-spacing:-.01em}
h1{font-size:clamp(36px,5vw,58px)}
h2{font-size:clamp(27px,3.4vw,40px)}
h3{font-size:22px}
h4{font-size:18.5px}
h1 em,h2 em{font-style:italic;color:var(--blue)}
.lede{font-size:18.5px;color:var(--mut);max-width:62ch;line-height:1.75}
.eyebrow{font-family:var(--ps);font-weight:700;font-size:11.5px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--blue);display:block;margin-bottom:14px}
.math{font-family:var(--stx);font-style:italic}
.pencil{font-family:var(--cav);color:var(--mut);font-size:21px;line-height:1.3}
.small{font-size:14.5px}
.caption{font-size:14px;color:var(--mut);margin-top:12px}

/* graph paper ground */
.graph{background-color:var(--paper);
  background-image:linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:28px 28px;position:relative}
.graph::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(90% 70% at 50% 30%, transparent 55%, var(--paper) 100%)}
.graph>*{position:relative;z-index:1}

/* ------- buttons ------- */
.btn{display:inline-block;font-family:var(--ps);font-weight:700;font-size:14px;
  letter-spacing:.02em;text-align:center;background:var(--blue);color:#FCFDFF;
  border:1.5px solid var(--blue);border-radius:6px;padding:15px 28px;transition:all .22s ease}
.btn:hover{background:var(--blue-deep);border-color:var(--blue-deep);transform:translateY(-2px);
  box-shadow:0 14px 28px -14px rgba(27,52,104,.55)}
.btn-gold{background:var(--gold);border-color:var(--gold);color:#2A2312}
.btn-gold:hover{background:#C8892A;border-color:#C8892A;color:#241E0E}
.btn-ghost{background:transparent;color:var(--blue)}
.btn-ghost:hover{background:var(--blue);color:#FCFDFF;box-shadow:none}
.btn-wide{width:100%}
.btn-min{font-family:var(--ps);font-weight:700;font-size:14px;color:var(--blue);
  border-bottom:2px solid rgba(39,73,143,.35);padding-bottom:2px;transition:.2s}
.btn-min:hover{border-color:var(--blue)}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.cta-row.center{justify-content:center}

/* ------- header ------- */
header.site{position:sticky;top:0;z-index:60;background:rgba(251,250,246,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line2)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:18px}
.brand{font-family:var(--stx);font-weight:700;font-size:20px;white-space:nowrap;
  display:flex;align-items:center;gap:9px}
.brand .fs-mark{width:30px;height:30px;flex:0 0 auto}
.nav nav{display:flex;gap:22px;align-items:center}
.nav nav>a{font-family:var(--ps);font-weight:600;font-size:14px;color:var(--ink2);
  transition:.2s;white-space:nowrap}
.nav nav>a:hover,.nav nav>a[aria-current]{color:var(--blue)}
.nav .btn{padding:10px 18px;font-size:13.5px}
.menu-t{display:none;border:1.5px solid var(--blue);border-radius:6px;padding:8px 15px;
  font-family:var(--ps);font-weight:700;font-size:13px;color:var(--blue)}

/* ------- sections ------- */
section.blk{padding:84px 0}
section.blk-t{padding-top:40px}
.head{max-width:700px;margin:0 auto 50px;text-align:center}
.head .lede{margin:14px auto 0}
.head-l{max-width:700px;margin-bottom:40px}
.head-l .lede{margin-top:14px}
.softblk{background:var(--paper2)}
.inkblk{background:var(--blue-deep);color:#EDF1F8}
.inkblk h2,.inkblk h3{color:#FFFFFF}
.inkblk .lede{color:#B9C4DA}
.inkblk .eyebrow{color:var(--gold)}

/* ------- hero ------- */
.hero{padding:72px 0 70px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero .est{font-family:var(--ps);font-weight:700;font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--mut)}
.hero h1{margin:16px 0 18px;max-width:16ch}
.hero .sub{font-size:19px;color:var(--mut);max-width:52ch;margin-bottom:32px;line-height:1.75}
.hero .proof{margin-top:24px;font-family:var(--ps);font-weight:600;font-size:13.5px;color:var(--mut)}
.hero .proof b{color:var(--blue)}

/* the sketchboard (animated math SVG) */
.sketch{position:relative}
.sketch svg{width:100%;height:auto}
.sketch .note{position:absolute;font-family:var(--cav);color:var(--ink2);opacity:0;
  animation:noteIn .8s ease forwards}
@keyframes noteIn{from{opacity:0;transform:translateY(6px) rotate(-2deg)}
  to{opacity:1;transform:rotate(-2deg)}}
/* line-drawing animation: every .draw path uses pathLength=1 */
.draw{stroke-dasharray:1;stroke-dashoffset:1;animation:drawIn 1.6s ease forwards}
@keyframes drawIn{to{stroke-dashoffset:0}}
.fadein{opacity:0;animation:fadeIn .9s ease forwards}
@keyframes fadeIn{to{opacity:1}}

/* ------- cards ------- */
.card{background:var(--white);border:1px solid var(--line2);border-radius:10px;
  padding:32px 28px;display:flex;flex-direction:column;box-shadow:var(--shadow);transition:.22s}
a.card:hover,.card.lift:hover{transform:translateY(-5px);
  box-shadow:0 24px 50px -26px rgba(27,52,104,.45)}
.card .no{font-family:var(--ps);font-weight:700;font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--blue);margin-bottom:12px}
.card h3,.card h4{margin-bottom:9px}
.card .why{font-size:15px;color:var(--mut);margin-bottom:16px;flex:1;line-height:1.65}
.card .price{font-family:var(--stx);font-weight:600;font-size:27px;margin-bottom:14px}
.card .price em{font-style:italic;font-size:14.5px;color:var(--mut);font-weight:400}
.card.rule-top{border-top:3px solid var(--blue)}
.card.rule-gold{border-top:3px solid var(--gold)}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* course cards — index-card feel with a margin rule */
.course-card{position:relative;background:var(--white);border:1px solid var(--line2);
  border-radius:10px;padding:28px 26px 28px 34px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;transition:.22s;overflow:hidden}
.course-card::before{content:"";position:absolute;top:0;bottom:0;left:18px;width:1.5px;
  background:rgba(176,74,58,.35)}
.course-card:hover{transform:translateY(-4px)}
.course-card .lvl{font-family:var(--ps);font-weight:700;font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--mut);margin-bottom:8px}
.course-card h3{font-size:21px;margin-bottom:6px}
.course-card .meta{font-size:13.5px;color:var(--mut);margin-bottom:10px}
.course-card .why{font-size:14.5px;color:var(--mut);flex:1;line-height:1.6;margin-bottom:14px}
.course-card .row{display:flex;justify-content:space-between;align-items:center;gap:10px}
.course-card .p{font-family:var(--stx);font-weight:600;font-size:22px}
.status{display:inline-block;font-family:var(--ps);font-weight:700;font-size:10.5px;
  letter-spacing:.14em;text-transform:uppercase;border-radius:4px;padding:4px 9px}
.status.open{color:var(--good);border:1px solid rgba(62,124,79,.5);background:rgba(62,124,79,.08)}
.status.wait{color:var(--mut);border:1px solid var(--line2);background:var(--paper2)}

/* ------- offer stack ------- */
.stack{max-width:780px;margin:0 auto}
.stack-item{display:flex;gap:18px;align-items:flex-start;padding:20px 0;border-bottom:1px solid var(--line2)}
.stack-item .tick{flex:0 0 30px;height:30px;border-radius:50%;border:1.5px solid var(--blue);
  display:grid;place-items:center;color:var(--blue);font-weight:700;font-size:14px;margin-top:2px}
.stack-item h4{font-size:18.5px;margin-bottom:5px}
.stack-item p{font-size:15px;color:var(--mut);line-height:1.65}
.stack-item .kills{display:block;margin-top:8px;font-size:13.5px;color:var(--blue-deep);
  font-style:italic;font-family:var(--stx)}

/* guarantee slabs */
.guarantee{border:1.5px solid var(--ink);border-radius:10px;background:var(--white);
  padding:30px 32px;box-shadow:8px 8px 0 rgba(223,162,59,.35)}
.guarantee .g-name{font-family:var(--stx);font-weight:700;font-size:21px;margin-bottom:10px}
.guarantee p{font-size:15.5px;line-height:1.7}
.guarantee .g-why{font-size:13.5px;color:var(--mut);margin-top:12px;font-style:italic}

/* price framing table */
.frame-table{max-width:780px;margin:0 auto;border:1px solid var(--line2);border-radius:10px;
  overflow:hidden;background:var(--white);box-shadow:var(--shadow)}
.frame-row{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:0;border-bottom:1px solid var(--line2)}
.frame-row:last-child{border-bottom:0}
.frame-row>div{padding:16px 20px;font-size:15px}
.frame-row.headr>div{font-family:var(--ps);font-weight:700;font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--mut);background:var(--paper2)}
.frame-row .num{font-family:var(--stx);font-weight:600;font-size:18px}
.frame-row.us{background:rgba(39,73,143,.05)}
.frame-row.us>div:first-child{font-weight:700;color:var(--blue-deep)}

/* ------- reviews ------- */
.review{background:var(--white);border:1px solid var(--line2);border-radius:10px;
  padding:26px 26px;box-shadow:var(--shadow)}
.review .stars{color:var(--gold);letter-spacing:.16em;font-size:14px;margin-bottom:12px}
.review blockquote{font-size:15.5px;line-height:1.7;margin-bottom:14px}
.review cite{display:flex;align-items:center;gap:10px;font-style:normal}
.review .avatar{width:38px;height:38px;border-radius:50%;background:var(--blue-soft);
  color:var(--blue-deep);display:grid;place-items:center;font-family:var(--stx);
  font-weight:700;font-size:15px;flex:0 0 auto}
.review .who{font-family:var(--ps);font-weight:700;font-size:13.5px}
.review .who span{display:block;font-weight:500;font-size:12px;color:var(--mut)}

/* ------- badges / seals ------- */
.seals{display:flex;gap:26px;flex-wrap:wrap;justify-content:center;align-items:center}
.seal{display:flex;align-items:center;gap:10px;font-family:var(--ps);font-weight:700;
  font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--mut)}
.seal .ring{width:46px;height:46px;border-radius:50%;border:1.5px solid var(--gold);
  box-shadow:inset 0 0 0 3px var(--paper),inset 0 0 0 4px rgba(223,162,59,.5);
  display:grid;place-items:center;font-family:var(--stx);font-size:17px;color:var(--gold);flex:0 0 auto}
.seal b{display:block;color:var(--ink2)}

/* ------- faculty ------- */
.fac{display:flex;gap:18px;align-items:flex-start}
.fac .avatar{width:56px;height:56px;border-radius:50%;background:var(--blue-deep);
  color:#EDF1F8;display:grid;place-items:center;font-family:var(--stx);font-weight:700;
  font-size:20px;flex:0 0 auto}
.fac h4{margin-bottom:3px}
.fac .spec{font-family:var(--ps);font-weight:700;font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--blue);margin-bottom:8px}
.fac p{font-size:14.5px;color:var(--mut);line-height:1.65}

/* ------- forms ------- */
.field{width:100%;background:var(--white);border:1px solid var(--line);border-radius:6px;
  padding:13px 15px;font:400 16.5px var(--ps);color:var(--ink);margin-bottom:16px}
.field:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px rgba(39,73,143,.15)}
textarea.field{min-height:130px;resize:vertical;line-height:1.6}
select.field{appearance:auto}
label.lab{display:block;font-family:var(--ps);font-weight:700;font-size:12px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--ink2);margin-bottom:7px}
form.inline{display:flex;max-width:520px;margin:0 auto;gap:0;border:1.5px solid var(--blue);
  border-radius:8px;background:var(--white);padding:5px}
form.inline input{flex:1;border:0;background:transparent;padding:12px 15px;
  font:400 16px var(--ps);color:var(--ink);min-width:0}
form.inline input:focus{outline:none}
form.inline .btn{padding:12px 20px}
.consent{font-size:13px;color:var(--mut);margin-top:12px}
.form-done{font-family:var(--stx);font-style:italic;font-size:18px;padding:12px 14px;color:var(--blue-deep)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.chip{border:1.5px solid var(--line2);border-radius:6px;background:var(--white);padding:11px 18px;
  font-family:var(--ps);font-weight:600;font-size:14px;color:var(--ink2);transition:.2s;text-align:left}
.chip:hover{border-color:var(--blue);color:var(--blue)}
.chip.sel{background:var(--blue);border-color:var(--blue);color:#FCFDFF}

/* ------- quiz / lesson shells ------- */
.tool-shell{max-width:640px;margin:0 auto}
.qstep{display:none}
.qstep.active{display:block;animation:hsfade .4s ease}
@keyframes hsfade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.qbar{height:5px;background:var(--line2);border-radius:3px;margin-bottom:34px;overflow:hidden}
.qbar i{display:block;height:100%;background:var(--blue);border-radius:3px;transition:width .3s ease}
.qnum{font-family:var(--ps);font-weight:700;font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--mut2);margin-bottom:10px}
.qq{font-family:var(--stx);font-weight:600;font-size:clamp(21px,3vw,27px);margin-bottom:8px;line-height:1.3}
.qmath{font-family:var(--stx);font-size:clamp(24px,3.4vw,32px);margin:10px 0 22px}
.qopt{display:block;width:100%;text-align:left;background:var(--white);border:1.5px solid var(--line2);
  border-radius:8px;padding:15px 18px;margin-bottom:11px;font-size:17px;transition:.18s;cursor:pointer;
  font-family:var(--stx)}
.qopt:hover{border-color:var(--blue);transform:translateX(3px)}
.qopt.sel{border-color:var(--blue);background:rgba(39,73,143,.07);box-shadow:inset 3px 0 0 var(--blue)}
.qopt.correct{border-color:var(--good);background:rgba(62,124,79,.08)}
.qopt.wrong{border-color:var(--bad);background:rgba(176,74,58,.07)}
.result-card{background:var(--white);border:1.5px solid var(--line);border-radius:10px;
  padding:36px 34px;box-shadow:8px 8px 0 rgba(39,73,143,.12);margin-bottom:24px}
.result-card .r-eyebrow{font-family:var(--ps);font-weight:700;font-size:11.5px;
  letter-spacing:.2em;text-transform:uppercase;color:var(--blue);margin-bottom:12px}
.locked{display:flex;justify-content:space-between;gap:14px;padding:12px 2px;
  border-top:1px solid var(--line2);font-size:14.5px;color:var(--mut)}
.locked b{color:var(--ink);font-weight:700}
.skillbar{margin-bottom:13px}
.skillbar .brow{display:flex;justify-content:space-between;font-size:14px;margin-bottom:5px}
.skillbar .brow b{font-weight:700}
.skillbar .track{height:8px;border-radius:4px;background:var(--paper2);overflow:hidden}
.skillbar .fill{height:100%;border-radius:4px;background:var(--blue)}
.skillbar .fill.gap{background:var(--bad)}

/* lesson blocks */
.lesson-block{background:var(--white);border:1px solid var(--line2);border-left:4px solid var(--blue);
  border-radius:0 10px 10px 0;padding:26px 28px;margin-bottom:22px}
.lesson-block .lb-tag{font-family:var(--ps);font-weight:700;font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--blue);display:block;margin-bottom:10px}
.lesson-block p{font-size:16px;line-height:1.75;margin-bottom:12px}
.lesson-block p:last-child{margin-bottom:0}
.eq{font-family:var(--stx);font-size:20px;text-align:center;padding:14px 0;letter-spacing:.02em}
.step-note{font-family:var(--cav);font-size:20px;color:var(--blue-deep);margin-left:12px}
.hintbox{border:1.5px dashed var(--gold);border-radius:8px;background:rgba(223,162,59,.06);
  padding:16px 20px;margin:14px 0;font-size:15px;line-height:1.7}

/* note card & prose */
.note-card{border:1px solid var(--line2);border-left:4px solid var(--gold);border-radius:0 8px 8px 0;
  background:var(--white);padding:20px 24px;margin:26px 0;font-size:15px;line-height:1.7}
.prose{max-width:700px;margin:0 auto;font-size:17px}
.prose p{margin-bottom:19px;line-height:1.8}
.prose h2{font-size:clamp(23px,3vw,30px);margin:42px 0 14px}
.prose h3{font-size:20px;margin:34px 0 12px}
.prose ul,.prose ol{margin:0 0 19px 22px}
.prose li{margin-bottom:9px;line-height:1.7}
.prose blockquote{font-family:var(--stx);font-style:italic;font-size:20px;line-height:1.55;
  border-left:3px solid var(--blue);padding:4px 0 4px 22px;margin:28px 0;color:var(--ink2)}
.byline{font-family:var(--ps);font-weight:600;font-size:13px;color:var(--mut);
  border-top:1px solid var(--line2);border-bottom:1px solid var(--line2);
  padding:10px 2px;margin:24px 0 34px;letter-spacing:.04em;text-transform:uppercase}

/* ------- FAQ ------- */
.faq{max-width:740px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line2)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;
  gap:20px;padding:20px 2px;font-family:var(--stx);font-weight:600;font-size:18.5px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--blue);font-size:22px;font-family:var(--ps);transition:.25s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 2px 20px;color:var(--mut);font-size:15.5px;line-height:1.75}

/* ------- footer ------- */
footer.site{background:var(--blue-deep);color:#D7DEED;padding:60px 0 38px}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:38px;margin-bottom:40px}
.foot-grid .brand{color:#FFFFFF;font-size:19px}
.foot-grid p{font-size:14px;color:#A9B5CE;margin-top:12px;line-height:1.7}
.foot-h{font-family:var(--ps);font-weight:700;font-size:11.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--gold);margin-bottom:14px}
.foot-grid nav a{display:block;font-size:14.5px;color:#C4CDE0;padding:4px 0;transition:.2s}
.foot-grid nav a:hover{color:#FFFFFF}
.legal{font-size:12.5px;color:#8D9AB8;max-width:84ch;margin:0 auto;line-height:1.8;
  text-align:center;border-top:1px solid rgba(215,222,237,.15);padding-top:26px}
.legal a{border-bottom:1px solid rgba(223,162,59,.5)}

/* ------- apply bar ------- */
.applybar{position:fixed;left:0;right:0;bottom:0;z-index:70;background:var(--blue-deep);
  color:#EDF1F8;transform:translateY(110%);transition:transform .35s;border-top:2px solid var(--gold)}
.applybar.show{transform:none}
.applybar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 28px}
.applybar .t{font-family:var(--stx);font-weight:600;font-size:17px}
.applybar .p{color:var(--gold);margin-left:10px;font-family:var(--stx);font-size:17px}
.applybar .btn{padding:10px 20px;font-size:13.5px;background:var(--gold);border-color:var(--gold);color:#2A2312}

/* scroll offer */
.scroll-offer{position:fixed;right:22px;bottom:22px;z-index:80;width:min(360px,calc(100vw - 40px));
  background:var(--white);border:1.5px solid var(--blue);border-radius:10px;
  box-shadow:0 26px 60px -18px rgba(27,52,104,.5);padding:24px 22px;
  transform:translateY(30px);opacity:0;visibility:hidden;transition:.4s}
.scroll-offer.show{transform:none;opacity:1;visibility:visible}
.scroll-offer h4{margin-bottom:6px}
.scroll-offer p{font-size:14px;color:var(--mut);margin-bottom:12px;line-height:1.6}
.scroll-offer .x{position:absolute;top:5px;right:9px;font-size:20px;color:var(--mut2);padding:5px}

/* reveal */
.rev{opacity:0;transform:translateY(18px);transition:opacity .7s ease, transform .7s ease}
.rev.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .rev{opacity:1;transform:none}
  .draw{stroke-dashoffset:0}
  .fadein,.sketch .note{opacity:1}
}
@media (max-width:960px){
  .grid-3{grid-template-columns:1fr 1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:660px){
  body{font-size:16px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .nav nav{position:absolute;top:72px;left:0;right:0;background:var(--paper);
    border-bottom:1px solid var(--line2);flex-direction:column;padding:16px 28px 22px;
    gap:14px;display:none;align-items:flex-start;box-shadow:0 20px 40px -20px rgba(27,52,104,.35)}
  .nav nav.open{display:flex}
  .menu-t{display:block}
  section.blk{padding:58px 0}
  .hero{padding:52px 0 50px}
  .card{padding:24px 20px}
  form.inline{flex-direction:column;gap:8px;padding:8px}
  form.inline .btn{width:100%}
  .frame-row{grid-template-columns:1.2fr 1fr 1fr}
  .frame-row>div{padding:12px 12px;font-size:13.5px}
  .frame-row .num{font-size:15.5px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .applybar .t{font-size:14.5px}
  .guarantee{box-shadow:5px 5px 0 rgba(223,162,59,.35);padding:24px 22px}
  .result-card{padding:26px 22px;box-shadow:5px 5px 0 rgba(39,73,143,.12)}
  .fac{flex-direction:row}
}