/* ============================================================
   MathScienceDojo — design system v2
   Palette: ink-pine / warm paper / marker gold
   Type: Fraunces (display) · Inter (body) · IBM Plex Mono (data)
   ============================================================ */

:root{
  --ink:        #14231C;
  --pine:       #1E4034;
  --pine-soft:  #2C5546;
  --sage:       #7FA08C;
  --sage-soft:  #B7C9BC;
  --paper:      #F6F4EE;
  --paper-2:    #ECE9E0;
  --gold:       #E0A32E;
  --gold-soft:  #F3D9A4;
  --redpen:     #C4553B;
  --line:       rgba(20,35,28,.14);
  --shadow:     0 24px 60px -24px rgba(20,35,28,.28);

  --font-display:"Fraunces", Georgia, serif;
  --font-body:"Inter", -apple-system, sans-serif;
  --font-mono:"IBM Plex Mono", ui-monospace, monospace;

  --ease-out:cubic-bezier(.22,1,.36,1);
  --ease-in-out:cubic-bezier(.65,0,.35,1);
  --dur:.8s;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{background:var(--paper);overflow-x:hidden;overflow-x:clip}
body{
  font-family:var(--font-body);
  color:var(--ink);
  line-height:1.65;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--gold-soft);color:var(--ink)}
img{max-width:100%;display:block}
a{color:inherit}

/* ------- exercise-book grid paper texture ------- */
.grid-paper{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:44px 44px;
  background-position:center top;
}
.grid-fade{position:relative}
.grid-fade::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background:linear-gradient(180deg, transparent 0%, var(--paper) 92%);
}
.grid-fade > *{position:relative;z-index:1}

/* ============ smooth-scroll wrapper (desktop lerp) ============ */
body.has-smooth #smooth{
  position:fixed;top:0;left:0;width:100%;
  will-change:transform;
}
#scroll-spacer{width:1px}

/* ================= page transition veil ================= */
#veil{
  position:fixed;inset:0;z-index:1000;pointer-events:none;
  display:flex;align-items:center;justify-content:center;
  background:var(--pine);
  transform:translateY(0);
}
#veil .veil-mark{
  font-family:var(--font-display);font-weight:600;
  color:var(--paper);font-size:clamp(1.4rem,3vw,2rem);
  letter-spacing:.02em;opacity:0;transform:translateY(12px);
}
body.veil-leave #veil{
  transition:transform .72s var(--ease-in-out) .12s;
  transform:translateY(-101%);
}
body.veil-leave #veil .veil-mark{
  transition:opacity .3s ease, transform .4s var(--ease-out);
  opacity:0;
}
body.veil-enter #veil{
  pointer-events:all;
  transition:transform .55s var(--ease-in-out);
  transform:translateY(0);
}
body.veil-enter #veil .veil-mark{
  transition:opacity .25s ease .18s, transform .35s var(--ease-out) .18s;
  opacity:1;transform:translateY(0);
}

/* ===================== nav ===================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:900;
  display:flex;align-items:center;justify-content:space-between;
  padding:1.1rem clamp(1.2rem,4vw,3rem);
  transition:background .4s ease, box-shadow .4s ease, padding .4s ease;
}
.nav.scrolled{
  background:rgba(246,244,238,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 1px 0 var(--line);
  padding-top:.7rem;padding-bottom:.7rem;
}
.nav-logo{
  font-family:var(--font-display);font-weight:600;font-size:1.22rem;
  text-decoration:none;letter-spacing:-.01em;display:flex;align-items:baseline;gap:.45rem;
}
.nav-logo .dot{width:9px;height:9px;border-radius:50%;background:var(--gold);align-self:center}
.nav-links{display:flex;gap:2rem;align-items:center;list-style:none}
.nav-links a{
  text-decoration:none;font-size:.92rem;font-weight:500;color:var(--pine);
  position:relative;padding:.25rem 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--gold);transform:scaleX(0);transform-origin:right;
  transition:transform .35s var(--ease-out);
}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);transform-origin:left}
.nav-cta{
  background:var(--pine);color:var(--paper)!important;padding:.62rem 1.25rem!important;
  border-radius:99px;font-weight:600;transition:transform .3s var(--ease-out), background .3s ease;
}
.nav-cta::after{display:none}
.nav-cta:hover{background:var(--pine-soft);transform:translateY(-2px)}
.nav-burger{display:none;background:none;border:0;cursor:pointer;padding:.4rem;z-index:950}
.nav-burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.35s var(--ease-out)}
@media(max-width:820px){
  .nav-burger{display:block;padding:.75rem .5rem}
  .nav-cta{padding:.9rem 1.4rem!important}
  .nav-links{
    position:fixed;inset:0;background:var(--paper);flex-direction:column;
    justify-content:center;gap:2.2rem;font-size:1.3rem;
    clip-path:circle(0 at calc(100% - 2.4rem) 2.2rem);
    transition:clip-path .6s var(--ease-in-out);
  }
  .nav-links.open{clip-path:circle(150% at calc(100% - 2.4rem) 2.2rem)}
  body.menu-open{overflow:hidden;height:100dvh;touch-action:none}
  .nav-links{overscroll-behavior:contain}
  body.menu-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  body.menu-open .nav-burger span:nth-child(2){opacity:0}
  body.menu-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* ===================== layout helpers ===================== */
.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(1.2rem,4vw,3rem)}
.section{padding:clamp(4.5rem,9vw,8rem) 0}
.eyebrow{
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--redpen);display:inline-flex;gap:.6rem;align-items:center;
  margin-bottom:1.1rem;
}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--redpen)}
h1,h2,h3{font-family:var(--font-display);font-weight:560;line-height:1.12;letter-spacing:-.015em;color:var(--ink)}
h1{font-size:clamp(2.6rem,6.4vw,4.6rem)}
h2{font-size:clamp(1.9rem,4vw,3rem);margin-bottom:1.2rem}
h3{font-size:1.28rem;font-weight:600}
.lede{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--pine);max-width:38em}
.muted{color:#5C6B62}

/* hand-drawn underline sweep */
.u-sweep{position:relative;white-space:nowrap}
.u-sweep svg{
  position:absolute;left:-2%;bottom:-.14em;width:104%;height:.42em;overflow:visible;
}
.u-sweep path{
  fill:none;stroke:var(--gold);stroke-width:7;stroke-linecap:round;
  stroke-dasharray:1;stroke-dashoffset:1;
}
.in-view .u-sweep path{animation:sweep 1s var(--ease-out) .45s forwards}
@keyframes sweep{to{stroke-dashoffset:0}}
@media(max-width:440px){
  .u-sweep{white-space:normal;box-shadow:inset 0 -0.32em var(--gold-soft)}
  .u-sweep svg{display:none}
}

/* ===================== buttons ===================== */
.btn{
  display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;
  font-weight:600;font-size:.98rem;border-radius:99px;padding:.95rem 1.8rem;
  transition:transform .35s var(--ease-out), box-shadow .35s ease, background .3s ease;
  will-change:transform;
}
.btn-primary{background:var(--pine);color:var(--paper);box-shadow:0 14px 30px -14px rgba(30,64,52,.55)}
.btn-primary:hover{background:var(--pine-soft);transform:translateY(-3px);box-shadow:0 20px 38px -14px rgba(30,64,52,.55)}
.btn-ghost{color:var(--pine);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--pine);transform:translateY(-3px)}
.btn .arr{transition:transform .35s var(--ease-out)}
.btn:hover .arr{transform:translateX(4px)}
.btn-wa{background:#25D366;color:#fff;box-shadow:0 14px 30px -14px rgba(37,211,102,.6)}
.btn-wa:hover{transform:translateY(-3px)}

/* ===================== hero ===================== */
.hero{
  min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding-top:7rem;position:relative;
}
.hero-kicker{margin-bottom:1.4rem}
.hero h1{max-width:11em}
.hero .lede{margin:1.6rem 0 2.4rem}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}
.hero-note{font-family:var(--font-mono);font-size:.8rem;color:#5C6B62;margin-top:1.6rem}

/* staggered load-in */
[data-stagger]{opacity:0;transform:translateY(26px)}
.page-ready [data-stagger]{
  animation:rise .9s var(--ease-out) forwards;
  animation-delay:calc(var(--i) * .12s + .35s);
}
@keyframes rise{to{opacity:1;transform:none}}

/* floating score cards */
.hero-cards{
  position:absolute;right:clamp(0rem,4vw,3rem);top:50%;transform:translateY(-50%);
  display:flex;flex-direction:column;gap:1.2rem;z-index:2;
}
.score-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:1.1rem 1.4rem;box-shadow:var(--shadow);
  min-width:200px;
}
.score-card .label{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:#5C6B62}
.score-card .score{
  font-family:var(--font-mono);font-weight:600;font-size:1.7rem;color:var(--pine);
  display:flex;align-items:baseline;gap:.5rem;margin-top:.2rem;
}
.score-card .from{font-size:1rem;color:var(--redpen);text-decoration:line-through;text-decoration-thickness:2px}
.score-card .tick{color:var(--gold);font-size:1.1rem}
.float-a{animation:floaty 6s ease-in-out infinite}
.float-b{animation:floaty 7s ease-in-out -2s infinite}
.float-c{animation:floaty 8s ease-in-out -4s infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@media(max-width:1020px){
  .hero-cards{position:static;transform:none;flex-direction:row;flex-wrap:wrap;margin-top:3rem}
}

/* ===================== marquee ===================== */
.marquee{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  overflow:hidden;padding:1.05rem 0;background:var(--paper-2);
}
.marquee-track{display:flex;gap:3.2rem;width:max-content;animation:marquee 34s linear infinite}
.marquee span{
  font-family:var(--font-mono);font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--pine);display:flex;align-items:center;gap:3.2rem;white-space:nowrap;
}
.marquee b{color:var(--gold);font-weight:400}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ===================== reveal on scroll ===================== */
[data-reveal]{opacity:0;transform:translateY(34px);transition:opacity .9s var(--ease-out), transform .9s var(--ease-out)}
[data-reveal].in-view{opacity:1;transform:none}
[data-reveal="left"]{transform:translateX(-40px)}
[data-reveal="right"]{transform:translateX(40px)}
[data-reveal="scale"]{transform:scale(.94)}
.stagger>*{opacity:0;transform:translateY(30px);transition:opacity .8s var(--ease-out), transform .8s var(--ease-out)}
.stagger.in-view>*{opacity:1;transform:none}
.stagger.in-view>*:nth-child(1){transition-delay:.05s}
.stagger.in-view>*:nth-child(2){transition-delay:.16s}
.stagger.in-view>*:nth-child(3){transition-delay:.27s}
.stagger.in-view>*:nth-child(4){transition-delay:.38s}
.stagger.in-view>*:nth-child(5){transition-delay:.49s}
.stagger.in-view>*:nth-child(6){transition-delay:.6s}

/* ===================== cards / grids ===================== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
@media(max-width:900px){.grid-3{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}}
.card{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:2rem;
  transition:transform .45s var(--ease-out), box-shadow .45s ease;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.card .num{
  font-family:var(--font-mono);color:var(--redpen);font-size:.8rem;letter-spacing:.12em;
  display:block;margin-bottom:.9rem;
}
.card h3{margin-bottom:.6rem}
.card p{color:#4B584F;font-size:.97rem}

/* ===================== results band ===================== */
.results-band{background:var(--pine);color:var(--paper);border-radius:28px;overflow:hidden;position:relative}
.results-band .inner{padding:clamp(2.6rem,5vw,4.2rem);position:relative;z-index:1}
.results-band h2{color:var(--paper)}
.results-band .grid-3{margin-top:2.4rem}
.result{border:1px solid rgba(246,244,238,.18);border-radius:18px;padding:1.6rem;background:rgba(246,244,238,.05)}
.result .subject{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--sage-soft)}
.result .jump{
  font-family:var(--font-mono);font-size:clamp(1.45rem,4.4vw,2.6rem);font-weight:600;margin:.5rem 0 .2rem;
  display:flex;align-items:baseline;gap:.5rem;color:#fff;white-space:nowrap;
}
.result .jump .to{color:var(--gold);white-space:nowrap}
.result .in-months{font-size:.85rem;color:var(--sage-soft)}
.results-band .chalk{
  position:absolute;inset:0;opacity:.07;
  background-image:
    linear-gradient(rgba(246,244,238,.8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246,244,238,.8) 1px, transparent 1px);
  background-size:44px 44px;
}

/* ===================== method steps ===================== */
.steps{counter-reset:step;display:grid;gap:0;border-top:1px solid var(--line)}
.step{
  display:grid;grid-template-columns:90px 1fr;gap:1.6rem;align-items:start;
  padding:2rem 0;border-bottom:1px solid var(--line);
  transition:background .3s ease, padding-left .45s var(--ease-out);
}
.step:hover{background:rgba(224,163,46,.06);padding-left:.8rem}
.step .s-num{
  font-family:var(--font-display);font-size:2.6rem;color:var(--sage);line-height:1;
}
.step h3{margin-bottom:.4rem}
.step p{color:#4B584F;max-width:44em}
@media(max-width:640px){.step{grid-template-columns:56px 1fr;gap:1rem}.step .s-num{font-size:1.9rem}}

/* ===================== quote / testimonial ===================== */
.quote{
  max-width:820px;margin:0 auto;text-align:center;
}
.quote blockquote{
  font-family:var(--font-display);font-size:clamp(1.35rem,2.8vw,2rem);line-height:1.4;
  color:var(--pine);font-weight:500;
}
.quote blockquote::before{content:"“";color:var(--gold);font-size:1.4em}
.quote cite{
  display:block;margin-top:1.4rem;font-style:normal;font-family:var(--font-mono);
  font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;color:#5C6B62;
}

/* ===================== FAQ ===================== */
.faq{max-width:820px;margin:0 auto}
.faq details{
  border-bottom:1px solid var(--line);padding:1.3rem 0;
}
.faq summary{
  cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;
  font-weight:600;font-size:1.06rem;font-family:var(--font-body);gap:1rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .plus{
  flex:none;width:26px;height:26px;border:1.5px solid var(--line);border-radius:50%;
  display:grid;place-items:center;font-weight:400;color:var(--pine);
  transition:transform .4s var(--ease-out), background .3s ease, color .3s ease;
}
.faq details[open] summary .plus{transform:rotate(45deg);background:var(--pine);color:var(--paper);border-color:var(--pine)}
.faq .a{padding-top:.9rem;color:#4B584F;max-width:46em}

/* ===================== CTA panel ===================== */
.cta-panel{
  background:linear-gradient(135deg, var(--pine) 0%, var(--pine-soft) 100%);
  border-radius:28px;color:var(--paper);text-align:center;
  padding:clamp(3rem,6vw,5rem) 2rem;position:relative;overflow:hidden;
}
.cta-panel h2{color:var(--paper)}
.cta-panel p{color:var(--sage-soft);max-width:34em;margin:0 auto 2rem}
.cta-panel .glow{
  position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle, rgba(224,163,46,.22), transparent 65%);
  top:-260px;right:-160px;pointer-events:none;
}

/* ===================== footer ===================== */
footer{border-top:1px solid var(--line);padding:3rem 0 2.2rem;margin-top:clamp(3rem,6vw,5rem)}
.foot{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;align-items:flex-start}
.foot .brand{font-family:var(--font-display);font-weight:600;font-size:1.15rem}
.foot ul{list-style:none;display:flex;gap:1.6rem;flex-wrap:wrap}
.foot a{text-decoration:none;font-size:.92rem;color:var(--pine)}
.foot a:hover{color:var(--gold)}
.foot .fine{width:100%;margin-top:1.6rem;font-family:var(--font-mono);font-size:.74rem;color:#8A958D}

/* ===================== page hero (inner pages) ===================== */
.page-hero{padding:11rem 0 4rem;position:relative}
.page-hero h1{max-width:14em}
.page-hero .lede{margin-top:1.4rem}

/* ===================== about ===================== */
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(2rem,5vw,4.5rem);align-items:start}
@media(max-width:900px){.about-grid{grid-template-columns:1fr}}
.portrait{
  border-radius:24px;overflow:hidden;background:var(--paper-2);
  border:1px solid var(--line);aspect-ratio:4/5;position:relative;box-shadow:var(--shadow);
}
.portrait img{width:100%;height:100%;object-fit:cover}
.portrait .ph{
  position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:2rem;
  color:#8A958D;font-family:var(--font-mono);font-size:.8rem;letter-spacing:.08em;
}
.cred{display:flex;gap:1rem;align-items:baseline;padding:1rem 0;border-bottom:1px solid var(--line)}
.cred .k{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:var(--redpen);flex:none;width:120px}

/* ===================== programmes ===================== */
.prog{
  background:#fff;border:1px solid var(--line);border-radius:24px;padding:2.4rem;
  display:flex;flex-direction:column;gap:1.1rem;position:relative;overflow:hidden;
  transition:transform .45s var(--ease-out), box-shadow .45s ease;
}
.prog:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.prog .tag{
  align-self:flex-start;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;
  text-transform:uppercase;background:var(--gold-soft);color:#7A5613;padding:.35rem .8rem;border-radius:99px;
}
.prog ul{list-style:none;display:grid;gap:.55rem;margin:.4rem 0 .6rem}
.prog li{display:flex;gap:.65rem;font-size:.95rem;color:#4B584F}
.prog li::before{content:"✓";color:var(--gold);font-weight:700}
.prog .p-cta{margin-top:auto}

/* ===================== blog article ===================== */
.article{max-width:760px;margin:0 auto}
.article .meta{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:#5C6B62;margin-bottom:1rem}
.article h1{font-size:clamp(2.1rem,4.6vw,3.3rem)}
.article h2{font-size:1.6rem;margin:2.8rem 0 .9rem}
.article p{margin-bottom:1.2rem;color:#37423B}
.article .reason{
  border-left:3px solid var(--gold);padding-left:1.4rem;margin:2.4rem 0;
}
.article .callout{
  background:var(--paper-2);border:1px solid var(--line);border-radius:16px;
  padding:1.4rem 1.6rem;margin:2rem 0;font-size:.98rem;
}
.article .callout b{color:var(--pine)}

/* ===================== misc ===================== */
.parallax{will-change:transform}
.wa-float{
  position:fixed;right:1.4rem;bottom:1.4rem;z-index:800;
  width:56px;height:56px;border-radius:50%;background:#25D366;color:#fff;
  display:grid;place-items:center;text-decoration:none;
  box-shadow:0 16px 34px -12px rgba(37,211,102,.7);
  transition:transform .35s var(--ease-out);
}
.wa-float:hover{transform:translateY(-4px) scale(1.06)}
.wa-float svg{width:28px;height:28px}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
  [data-stagger],[data-reveal],.stagger>*{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}