/* ============================================================
   hulkenstein.study - shared stylesheet
   Design system: see HULKENSTEIN-STUDY-DESIGN.md
   Fonts self-hosted, one green accent, 20px/pill shape lock.
   ============================================================ */

@font-face{
  font-family:'Bricolage Grotesque';
  font-style:normal;
  font-weight:200 800;
  font-display:swap;
  src:url('fonts/bricolage-grotesque-variable.woff2') format('woff2');
}
@font-face{
  font-family:'Work Sans';
  font-style:normal;
  font-weight:400 700;
  font-display:swap;
  src:url('fonts/work-sans-variable.woff2') format('woff2');
}
@font-face{
  font-family:'Work Sans';
  font-style:italic;
  font-weight:500;
  font-display:swap;
  src:url('fonts/work-sans-italic-500.woff2') format('woff2');
}

/* ---------- tokens: light ---------- */
:root{
  --paper:#fbfdfa;
  --paper-dim:#f3f7f3;
  --paper-raise:#ffffff;
  --ink:#0e1512;
  --gray:#5c6b62;
  --gray-soft:#63746a;          /* AA on all three surfaces, see design doc */
  --line:#e1ece3;
  --line-strong:#cfe0d4;
  --green:#20ae4c;              /* decorative fills ONLY, fails AA as text on light */
  --green-deep:#106e30;         /* text-safe green: links, button fills */
  --green-wash:#eaf7ee;
  --on-green:#ffffff;           /* label colour on a --green-deep fill */
  /* Brand-strip tiles. These stay LIGHT in both themes on purpose: two of the
     four family logos are dark ink on transparent and QNA's is a JPEG with a
     baked-in white background, so a dark tile makes one invisible and the
     other a white box. See design doc section 8. */
  --tile:#f3f7f3;
  --tile-line:#e1ece3;
  --tile-hover:#eaf7ee;
  --btn-fill:var(--green-deep);
  --radius:20px;
  --shadow:0 20px 44px -28px rgba(16,110,48,.35);
  --shadow-lift:0 26px 56px -26px rgba(16,110,48,.42);
  --shadow-pop:0 32px 80px -30px rgba(10,30,18,.28);
  --grain-blend:multiply;
  --grain-opacity:.035;
  --ring:0 0 0 3px rgba(32,174,76,.32);
  --scrim:rgba(12,22,16,.42);
  color-scheme:light;
}

/* ---------- tokens: dark ----------
   Every colour below is a REDEFINITION of a token defined on bare :root above,
   so nothing has its only definition inside a conditional block.
   --green-deep keeps its ROLE (text-safe green) but inverts in value: on a dark
   ground the readable green is light, not deep. Contrast verified:
   ink 16.8:1, gray 8.8:1, gray-soft 5.6:1, green-deep 11.9:1 on --paper.       */
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0b100d;
    --paper-dim:#141c17;
    --paper-raise:#151e19;
    --ink:#e9f2ec;
    --gray:#a3b4a9;
    --gray-soft:#7d8f84;
    --line:#22302a;
    --line-strong:#2e4036;
    --green:#2fd163;
    --green-deep:#63e493;
    --green-wash:#12241a;
    --on-green:#04120a;
    --tile:#eef3ef;
    --tile-line:#ccdbd1;
    --tile-hover:#ffffff;
    --btn-fill:var(--green);
    --shadow:0 20px 44px -28px rgba(0,0,0,.7);
    --shadow-lift:0 26px 56px -26px rgba(0,0,0,.8);
    --shadow-pop:0 32px 80px -30px rgba(0,0,0,.85);
    --grain-blend:screen;
    --grain-opacity:.05;
    --ring:0 0 0 3px rgba(47,209,99,.38);
    --scrim:rgba(0,0,0,.66);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#0b100d;
  --paper-dim:#141c17;
  --paper-raise:#151e19;
  --ink:#e9f2ec;
  --gray:#a3b4a9;
  --gray-soft:#7d8f84;
  --line:#22302a;
  --line-strong:#2e4036;
  --green:#2fd163;
  --green-deep:#63e493;
  --green-wash:#12241a;
  --on-green:#04120a;
  --tile:#eef3ef;
  --tile-line:#ccdbd1;
  --tile-hover:#ffffff;
  --btn-fill:var(--green);
  --shadow:0 20px 44px -28px rgba(0,0,0,.7);
  --shadow-lift:0 26px 56px -26px rgba(0,0,0,.8);
  --shadow-pop:0 32px 80px -30px rgba(0,0,0,.85);
  --grain-blend:screen;
  --grain-opacity:.05;
  --ring:0 0 0 3px rgba(47,209,99,.38);
  --scrim:rgba(0,0,0,.66);
  color-scheme:dark;
}

/* ---------- base ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
html,body{margin:0;padding:0}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'Work Sans','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',system-ui,sans-serif;
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  position:relative;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
a{color:inherit}
/* height:auto is load-bearing: every img carries width/height attributes to
   reserve layout space (CLS), and without this the height attribute becomes
   the used height and any CSS width stretches the image. */
img{max-width:100%;height:auto;display:block}
/* The UA rule for [hidden] loses to any author display rule, so state it. */
[hidden]{display:none!important}
button{font:inherit;color:inherit}
h1,h2,h3{
  font-family:'Bricolage Grotesque','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',system-ui,sans-serif;
  letter-spacing:-.024em;
  margin:0;
  font-weight:700;
}
em{font-style:italic;font-weight:500}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
.accent{color:var(--green-deep)}

/* one focus treatment for every interactive thing on the site */
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:999px}
.card:focus-visible,.qa:focus-visible{border-radius:var(--radius)}

/* ---------- 9. skip to content ---------- */
.skip{
  position:fixed;top:12px;left:50%;
  transform:translate(-50%,-160%);
  z-index:200;
  background:var(--btn-fill);color:var(--on-green);
  font-weight:700;font-size:14.5px;
  padding:12px 22px;border-radius:999px;
  text-decoration:none;
  box-shadow:var(--shadow-pop);
  transition:transform .26s cubic-bezier(.16,1,.3,1);
}
.skip:focus{transform:translate(-50%,0)}

/* ---------- atmosphere ---------- */
.grain{
  position:fixed;inset:0;z-index:60;pointer-events:none;
  opacity:var(--grain-opacity);mix-blend-mode:var(--grain-blend);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 5. scroll progress bar ---------- */
.progress{
  position:fixed;top:0;left:0;right:0;height:3px;
  z-index:120;pointer-events:none;
  background:transparent;
}
.progress i{
  display:block;height:100%;width:0%;
  background:linear-gradient(90deg,var(--green-deep),var(--green));
  border-radius:0 3px 3px 0;
  transition:width .08s linear;
}

/* ---------- 7. page loader ---------- */
#loader{
  position:fixed;inset:0;z-index:180;
  display:grid;place-items:center;
  background:var(--paper);
  /* CSS-only escape hatch: even if the JS never runs, the overlay clears itself
     so the page can never be permanently covered. */
  animation:loaderOut .5s cubic-bezier(.16,1,.3,1) 1.9s forwards;
}
#loader.done{animation:loaderOut .45s cubic-bezier(.16,1,.3,1) forwards}
@keyframes loaderOut{to{opacity:0;visibility:hidden;pointer-events:none}}
.loader-mark{
  width:46px;height:46px;border-radius:50%;
  border:2.5px solid var(--line-strong);
  border-top-color:var(--green);
  animation:spin .85s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.loader-word{
  margin-top:18px;
  font-family:'Bricolage Grotesque','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;
  font-weight:700;font-size:14px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gray-soft);
  text-align:center;
}

/* staggered page-load entrance, runs once after the loader clears */
.lift{opacity:0;transform:translateY(16px)}
.ready .lift{
  animation:liftIn .8s cubic-bezier(.16,1,.3,1) forwards;
  animation-delay:calc(var(--i,0) * 90ms);
}
@keyframes liftIn{to{opacity:1;transform:none}}

/* ---------- reveal-on-scroll ---------- */
.reveal{
  opacity:0;transform:translateY(22px);
  transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1);
}
.reveal.in{opacity:1;transform:none}

/* ---------- 2. sticky header ---------- */
header{
  position:sticky;top:0;z-index:100;
  background:color-mix(in srgb,var(--paper) 82%,transparent);
  backdrop-filter:blur(12px) saturate(140%);
  -webkit-backdrop-filter:blur(12px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:border-color .25s,box-shadow .25s,background .25s;
}
@supports not (background:color-mix(in srgb,red 50%,transparent)){
  header{background:var(--paper)}
}
header.stuck{
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px -24px rgba(10,30,18,.45);
}
header .bar{
  display:flex;align-items:center;gap:14px;
  height:74px;
  transition:height .25s cubic-bezier(.16,1,.3,1);
}
header.stuck .bar{height:62px}
.brand{
  display:flex;align-items:center;gap:9px;
  font-family:'Bricolage Grotesque','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;
  font-weight:700;font-size:18px;
  text-decoration:none;color:var(--ink);
  margin-right:auto;
  padding:6px 4px;border-radius:999px;
  transition:opacity .18s;
}
.brand:hover{opacity:.72}
.brand .dot{
  width:9px;height:9px;border-radius:50%;background:var(--green);
  flex:none;
  box-shadow:0 0 0 0 color-mix(in srgb,var(--green) 55%,transparent);
  animation:pulse 2.8s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--green) 55%,transparent)}
  70%{box-shadow:0 0 0 9px rgba(32,174,76,0)}
  100%{box-shadow:0 0 0 0 rgba(32,174,76,0)}
}
.hnav{display:flex;align-items:center;gap:8px}

/* ---------- 4. buttons: one hover/active language ---------- */
.pill,.cta,.icon-btn{
  border:1px solid var(--line);
  background:transparent;
  border-radius:999px;
  cursor:pointer;
  text-decoration:none;
  font-weight:600;
  transition:border-color .18s,color .18s,background .18s,transform .18s,box-shadow .18s;
}
.pill{
  color:var(--gray);font-size:14.5px;
  padding:9px 18px;white-space:nowrap;
}
.pill:hover{
  border-color:var(--green);color:var(--green-deep);
  background:var(--green-wash);transform:translateY(-2px);
}
.pill:active{transform:translateY(0) scale(.97)}

.icon-btn{
  width:40px;height:40px;flex:none;
  display:grid;place-items:center;
  color:var(--gray);
}
.icon-btn:hover{
  border-color:var(--green);color:var(--green-deep);
  background:var(--green-wash);transform:translateY(-2px);
}
.icon-btn:active{transform:translateY(0) scale(.94)}
.icon-btn svg{width:18px;height:18px;stroke-width:1.9;fill:none;stroke:currentColor}

/* the search trigger widens into a faux input on roomy screens */
.search-btn{
  display:flex;align-items:center;gap:9px;
  border:1px solid var(--line);background:transparent;
  border-radius:999px;padding:9px 12px 9px 14px;
  color:var(--gray-soft);font-size:14px;font-weight:500;
  cursor:pointer;min-width:212px;
  transition:border-color .18s,color .18s,background .18s,box-shadow .18s;
}
.search-btn:hover{border-color:var(--green);color:var(--green-deep);background:var(--green-wash)}
.search-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;flex:none}
.search-btn .kbd{margin-left:auto}
.kbd{
  font-family:'Work Sans','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;font-size:11.5px;font-weight:700;
  border:1px solid var(--line-strong);border-bottom-width:2px;
  border-radius:7px;padding:2px 6px;color:var(--gray-soft);
  background:var(--paper-dim);white-space:nowrap;
}

.cta{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--btn-fill);color:var(--on-green);
  border-color:transparent;
  padding:14px 26px;font-size:15.5px;font-weight:700;
  box-shadow:var(--shadow);
}
.cta:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-lift);
  background:color-mix(in srgb,var(--btn-fill) 88%,var(--ink));
}
.cta:active{transform:translateY(0) scale(.98)}
.cta .arw{transition:transform .22s cubic-bezier(.16,1,.3,1)}
.cta:hover .arw{transform:translateX(4px)}
.cta.ghost{
  background:transparent;color:var(--green-deep);
  border-color:var(--line-strong);box-shadow:none;
}
.cta.ghost:hover{background:var(--green-wash);border-color:var(--green)}

/* ---------- 3. mobile menu ---------- */
.burger{display:none}
#drawer{
  position:fixed;inset:0;z-index:150;
  visibility:hidden;
}
#drawer.open{visibility:visible}
#drawer .scrim{
  position:absolute;inset:0;background:var(--scrim);
  opacity:0;transition:opacity .3s;
  backdrop-filter:blur(2px);
}
#drawer.open .scrim{opacity:1}
#drawer .panel{
  position:absolute;top:0;right:0;bottom:0;
  width:min(340px,86vw);
  background:var(--paper);
  border-left:1px solid var(--line);
  box-shadow:var(--shadow-pop);
  padding:20px 22px 28px;
  display:flex;flex-direction:column;gap:8px;
  transform:translateX(100%);
  transition:transform .34s cubic-bezier(.16,1,.3,1);
  overflow-y:auto;
}
#drawer.open .panel{transform:none}
.drawer-top{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:14px;
}
.drawer-label{
  font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gray-soft);margin:18px 0 6px;
}
#drawer .panel a.dlink{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:13px 16px;border-radius:14px;
  text-decoration:none;color:var(--ink);
  font-weight:600;font-size:15.5px;
  border:1px solid transparent;
  transition:background .18s,border-color .18s,color .18s,transform .18s;
}
#drawer .panel a.dlink:hover{
  background:var(--green-wash);border-color:var(--line);
  color:var(--green-deep);transform:translateX(3px);
}
#drawer .panel a.dlink .meta{font-size:12.5px;font-weight:600;color:var(--gray-soft)}
#drawer .panel a.dlink:hover .meta{color:var(--green-deep)}

/* ---------- hero ---------- */
.hero{position:relative;padding:60px 0 44px;overflow:hidden}
.hero .grid{
  display:grid;grid-template-columns:1.05fr .95fr;
  align-items:center;gap:28px;
}

/* Ambient background vectors: soft organic shapes, hero section only, one
   green accent per the design system. Static (no animation), z-index:auto
   painted before .wrap in DOM order so content always sits on top. */
.hero-vector{
  position:absolute;pointer-events:none;opacity:.07;
}
.hero-vector-a{width:560px;height:560px;top:-190px;right:-160px}
.hero-vector-b{width:420px;height:420px;bottom:-160px;left:-140px}
@media (max-width:860px){
  .hero-vector-a{width:360px;height:360px;top:-120px;right:-130px}
  .hero-vector-b{display:none}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--green-deep);
  background:var(--green-wash);
  border:1px solid color-mix(in srgb,var(--green) 26%,transparent);
  padding:7px 14px;border-radius:999px;
  margin-bottom:20px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--green);flex:none}
.hero h1{
  font-size:clamp(2.5rem,5vw,3.9rem);
  line-height:1.04;font-weight:800;
  letter-spacing:-.032em;
}
.lede{
  margin:20px 0 28px;max-width:44ch;
  font-size:clamp(1rem,1.25vw,1.12rem);
  color:var(--gray);line-height:1.62;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-art{position:relative;display:grid;place-items:center;min-height:300px}
.hero-art picture{position:relative;z-index:1;display:block}
.hero-art img{
  position:relative;z-index:1;width:min(100%,430px);
  animation:float 7s ease-in-out infinite;
}
/* Stacking relies on DOM order (both this and .blob are z-index:auto,
   painted in source order below picture's explicit z-index:1) - keep this
   rule's element before .blob in index.html's markup. */
.hero-art .hero-glow{
  position:absolute;
  width:62%;aspect-ratio:1;
  left:50%;top:44%;
  transform:translate(-50%,-50%) translate(var(--mx,0px),var(--my,0px));
  border-radius:50%;
  background:radial-gradient(circle at 50% 50%,color-mix(in srgb,var(--green) 20%,transparent),transparent 72%);
  filter:blur(32px);
  pointer-events:none;
  transition:transform .5s cubic-bezier(.16,1,.3,1);
}
.hero-art .blob{
  position:absolute;width:74%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,color-mix(in srgb,var(--green) 34%,transparent),transparent 68%);
  filter:blur(18px);
  animation:breathe 9s ease-in-out infinite;
}
@keyframes float{50%{transform:translateY(-14px)}}
@keyframes breathe{50%{transform:scale(1.09) rotate(7deg)}}

/* ---------- brand strip ---------- */
.brands{padding:34px 0 56px}
.label{
  font-size:11.5px;font-weight:700;letter-spacing:.15em;text-transform:uppercase;
  color:var(--gray-soft);margin:0 0 18px;
}
.brand-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
}
.brand-card{
  display:grid;place-items:center;
  position:relative;
  background:var(--tile);
  border:1px solid var(--tile-line);
  border-radius:var(--radius);
  padding:22px 18px;min-height:96px;
  text-decoration:none;
  transition:transform .24s cubic-bezier(.16,1,.3,1),box-shadow .24s,border-color .24s,background .24s;
}
.brand-card img{
  max-height:44px;width:auto;
  filter:grayscale(1) contrast(.9) opacity(.7);
  transition:filter .26s;
}
.brand-tip{
  position:absolute;left:50%;bottom:100%;
  margin-bottom:8px;
  transform:translate(-50%,4px);
  background:var(--ink);color:var(--paper);
  font-size:12px;font-weight:700;letter-spacing:.01em;
  padding:6px 13px;border-radius:999px;
  white-space:nowrap;
  opacity:0;pointer-events:none;
  transition:opacity .2s,transform .2s cubic-bezier(.16,1,.3,1);
}
.brand-card:hover .brand-tip,
.brand-card:focus-within .brand-tip{
  opacity:1;transform:translate(-50%,0);
}
a.brand-card:hover{
  transform:translateY(-4px);
  border-color:color-mix(in srgb,var(--green) 40%,transparent);
  background:var(--tile-hover);
  box-shadow:var(--shadow);
}
a.brand-card:hover img{filter:grayscale(0) opacity(1)}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section .head{margin-bottom:34px;max-width:56ch}
.section .head h2{font-size:clamp(1.8rem,3.2vw,2.5rem);line-height:1.08}
.section .head p{margin:12px 0 0;color:var(--gray);font-size:16.5px}

/* ---------- 9. bento app directory ---------- */
.bento{
  display:grid;
  grid-template-columns:1.25fr 1fr;
  grid-auto-rows:minmax(150px,auto);
  gap:16px;
}
.card{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;gap:12px;
  border-radius:var(--radius);
  border:1px solid #d3ecda;
  background:var(--green-wash);
  padding:26px 26px 24px;
  --px:82%;--py:-10%;
  transition:transform .26s cubic-bezier(.16,1,.3,1),box-shadow .26s,border-color .26s;
}
:root[data-theme="dark"] .card{border-color:var(--line-strong)}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .card{border-color:var(--line-strong)}
}
.card.feature{grid-row:span 2}
.card::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(420px circle at var(--px) var(--py),color-mix(in srgb,var(--green) 16%,transparent),transparent 70%);
  opacity:0;transition:opacity .3s;
}
.card:not(.slot):hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lift);
  border-color:color-mix(in srgb,var(--green) 48%,transparent);
}
.card:not(.slot):hover::after{opacity:1}
.card h3{font-size:clamp(1.3rem,2.1vw,1.7rem);line-height:1.1}
.card.feature h3{font-size:clamp(1.7rem,2.9vw,2.3rem)}
.card p{margin:0;color:var(--gray);font-size:15.5px;line-height:1.6}
.card .cta{margin-top:auto;align-self:flex-start}
.status{
  display:inline-flex;align-items:center;gap:7px;
  font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--green-deep);margin-bottom:8px;
}
.status::before{
  content:'';width:7px;height:7px;border-radius:50%;
  background:var(--green);flex:none;
}
.card.slot{
  background:var(--paper-dim);
  border:1.5px dashed var(--line-strong);
}
.card.slot h3,.card.slot p{color:var(--gray-soft)}
.card.slot .status{color:var(--gray-soft)}
.card.slot .status::before{background:var(--gray-soft)}

/* ---------- 11. FAQ ---------- */
.faq{max-width:820px}
.qa{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--paper-raise);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .22s,box-shadow .22s,background .22s;
}
.qa:hover{border-color:var(--line-strong)}
.qa[open]{
  border-color:color-mix(in srgb,var(--green) 38%,transparent);
  box-shadow:var(--shadow);
}
.qa summary{
  display:flex;align-items:center;gap:16px;
  padding:20px 24px;cursor:pointer;
  font-family:'Bricolage Grotesque','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;
  font-weight:700;font-size:clamp(1.02rem,1.5vw,1.14rem);
  letter-spacing:-.015em;
  list-style:none;
  transition:color .18s;
}
.qa summary::-webkit-details-marker{display:none}
.qa summary:hover{color:var(--green-deep)}
.qa summary .chev{
  margin-left:auto;flex:none;
  width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line);
  color:var(--green-deep);
  transition:transform .3s cubic-bezier(.16,1,.3,1),background .22s,border-color .22s;
}
.qa summary:hover .chev{background:var(--green-wash);border-color:var(--green)}
.qa[open] summary .chev{transform:rotate(180deg)}
.qa summary .chev svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2.2}
.qa-body{overflow:hidden}
.qa-body .inner{
  padding:0 24px 22px;
  color:var(--gray);font-size:15.8px;line-height:1.68;
  max-width:66ch;
}
.qa-body .inner a{color:var(--green-deep);font-weight:600;text-decoration:underline;text-underline-offset:3px}
.qa-body .inner a:hover{text-decoration-thickness:2px}

/* ---------- 8. search palette ---------- */
#palette{
  position:fixed;inset:0;z-index:170;
  visibility:hidden;
}
#palette.open{visibility:visible}
#palette .scrim{
  position:absolute;inset:0;background:var(--scrim);
  backdrop-filter:blur(3px);
  opacity:0;transition:opacity .24s;
}
#palette.open .scrim{opacity:1}
.pal{
  position:relative;
  width:min(620px,calc(100vw - 32px));
  margin:clamp(40px,10vh,110px) auto 0;
  background:var(--paper);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  box-shadow:var(--shadow-pop);
  overflow:hidden;
  opacity:0;transform:translateY(-12px) scale(.98);
  transition:opacity .24s cubic-bezier(.16,1,.3,1),transform .24s cubic-bezier(.16,1,.3,1);
}
#palette.open .pal{opacity:1;transform:none}
.pal-field{
  display:flex;align-items:center;gap:12px;
  padding:16px 18px;border-bottom:1px solid var(--line);
}
.pal-field svg{width:19px;height:19px;fill:none;stroke:var(--gray-soft);stroke-width:2;flex:none}
.pal-field input{
  flex:1;border:0;background:transparent;outline:none;
  font-family:'Work Sans','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;font-size:16.5px;color:var(--ink);
}
.pal-field input::placeholder{color:var(--gray-soft)}
.pal-results{max-height:min(56vh,430px);overflow-y:auto;padding:8px}
.pal-group{
  font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gray-soft);padding:12px 12px 6px;
}
.pal-item{
  display:flex;align-items:center;gap:13px;
  width:100%;text-align:left;
  padding:11px 12px;border-radius:13px;
  border:1px solid transparent;background:transparent;
  text-decoration:none;cursor:pointer;
  transition:background .14s,border-color .14s;
}
.pal-item:hover,.pal-item[aria-selected="true"]{
  background:var(--green-wash);
  border-color:color-mix(in srgb,var(--green) 28%,transparent);
}
.pal-item .ico{
  width:34px;height:34px;flex:none;border-radius:10px;
  display:grid;place-items:center;
  background:var(--paper-dim);border:1px solid var(--line);
  color:var(--green-deep);font-size:14px;
}
.pal-item .ico svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2}
.pal-item .txt{min-width:0;flex:1}
.pal-item .t{font-weight:600;font-size:15px;color:var(--ink);display:block}
.pal-item .d{
  font-size:13px;color:var(--gray-soft);display:block;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.pal-item mark{background:color-mix(in srgb,var(--green) 34%,transparent);color:inherit;border-radius:3px;padding:0 1px}
.pal-item .ext{flex:none;color:var(--gray-soft);font-size:12px;font-weight:600}
.pal-empty{padding:34px 16px;text-align:center;color:var(--gray-soft);font-size:14.5px}
.pal-foot{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding:11px 16px;border-top:1px solid var(--line);
  background:var(--paper-dim);
  font-size:12px;color:var(--gray-soft);
}
.pal-foot span{display:inline-flex;align-items:center;gap:6px}

/* ---------- 6 + 10. floating action stack ---------- */
.fabs{
  position:fixed;right:22px;bottom:22px;z-index:110;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
}
.fab{
  display:inline-flex;align-items:center;gap:0;
  height:52px;border-radius:999px;
  border:1px solid transparent;
  background:var(--btn-fill);color:var(--on-green);
  box-shadow:var(--shadow-lift);
  text-decoration:none;cursor:pointer;
  font-weight:700;font-size:14.5px;
  padding:0;overflow:hidden;
  transition:transform .24s cubic-bezier(.16,1,.3,1),box-shadow .24s,background .24s,gap .24s,padding .24s;
}
.fab .fi{
  width:52px;height:52px;flex:none;
  display:grid;place-items:center;
}
.fab .fi svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:2}
.fab .fl{
  max-width:0;opacity:0;white-space:nowrap;
  transition:max-width .28s cubic-bezier(.16,1,.3,1),opacity .2s;
}
.fab:hover,.fab:focus-visible{
  transform:translateY(-3px);
  background:color-mix(in srgb,var(--btn-fill) 88%,var(--ink));
}
.fab:hover .fl,.fab:focus-visible .fl{max-width:180px;opacity:1;padding-right:22px}
.fab:active{transform:translateY(0) scale(.97)}

.fab.top{
  background:var(--paper-raise);color:var(--green-deep);
  border-color:var(--line-strong);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s,visibility .28s,transform .28s cubic-bezier(.16,1,.3,1),background .24s;
}
.fab.top.show{opacity:1;visibility:visible;transform:none}
.fab.top.show:hover{transform:translateY(-3px);background:var(--green-wash);border-color:var(--green)}

/* ---------- 12. cookie banner ---------- */
#cookie{
  position:fixed;left:22px;bottom:22px;z-index:115;
  width:min(390px,calc(100vw - 44px));
  background:var(--paper-raise);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  box-shadow:var(--shadow-pop);
  padding:20px 22px;
  transform:translateY(calc(100% + 40px));
  opacity:0;visibility:hidden;
  transition:transform .42s cubic-bezier(.16,1,.3,1),opacity .34s,visibility .34s;
}
#cookie.show{transform:none;opacity:1;visibility:visible}
#cookie h4{
  margin:0 0 8px;
  font-family:'Bricolage Grotesque','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;
  font-size:16px;font-weight:700;letter-spacing:-.015em;
}
#cookie p{margin:0 0 16px;font-size:14px;line-height:1.6;color:var(--gray)}
#cookie .row{display:flex;gap:10px;flex-wrap:wrap}
#cookie .cta{padding:10px 20px;font-size:14px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:30px 0 40px;margin-top:20px}
footer .bar{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;
}
footer p{margin:0;color:var(--gray-soft);font-size:13.5px}
footer .fbrand{font-weight:700;color:var(--ink)}
footer .flinks{display:flex;gap:18px;flex-wrap:wrap}
footer a{
  color:var(--gray-soft);text-decoration:none;font-size:13.5px;
  transition:color .18s;
}
footer a:hover{color:var(--green-deep);text-decoration:underline;text-underline-offset:3px}

/* ---------- 13. 404 ---------- */
.nf{padding:clamp(56px,11vh,110px) 0 80px;text-align:center}
.nf .code{
  font-family:'Bricolage Grotesque','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;
  font-size:clamp(5.5rem,20vw,13rem);
  font-weight:800;line-height:.86;letter-spacing:-.05em;
  color:transparent;
  -webkit-text-stroke:2px var(--line-strong);
  margin-bottom:8px;
  user-select:none;
}
.nf h1{font-size:clamp(1.8rem,4vw,2.7rem);margin-bottom:14px}
.nf p{color:var(--gray);font-size:17px;max-width:48ch;margin:0 auto 30px}
.nf .nf-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:54px}
.nf-links{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));
  gap:14px;max-width:760px;margin:0 auto;text-align:left;
}
.nf-links a{
  display:block;padding:20px 22px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--paper-dim);text-decoration:none;
  transition:transform .24s cubic-bezier(.16,1,.3,1),border-color .24s,background .24s,box-shadow .24s;
}
.nf-links a:hover{
  transform:translateY(-4px);background:var(--green-wash);
  border-color:color-mix(in srgb,var(--green) 44%,transparent);
  box-shadow:var(--shadow);
}
.nf-links strong{
  display:block;font-family:'Bricolage Grotesque','Noto Sans Bengali','Hind Siliguri','Nirmala UI','Shonar Bangla','Vrinda','Kalpurush',sans-serif;
  font-size:17px;margin-bottom:5px;letter-spacing:-.015em;
}
.nf-links span{font-size:13.8px;color:var(--gray-soft);line-height:1.55}

/* ============================================================
   responsive
   ============================================================ */
@media (max-width:980px){
  /* Collapse the HEADER trigger to an icon only. Scoped to the header on
     purpose: the copy inside the drawer is full width and keeps its label. */
  header .search-btn{
    min-width:0;padding:9px;width:40px;height:40px;justify-content:center;
  }
  header .search-btn .qtext,header .search-btn .kbd{display:none}
}
@media (max-width:860px){
  .hero{padding:40px 0 34px}
  .hero .grid{grid-template-columns:1fr;gap:12px}
  .hero-art{order:-1;min-height:220px}
  .hero-art img{width:min(76%,320px)}
  .lede{max-width:none}
  .bento{grid-template-columns:1fr}
  .card.feature{grid-row:auto}
  .brand-row{grid-template-columns:repeat(2,1fr)}
  .section{padding:56px 0}
  /* nav collapses into the drawer */
  .hnav .desk{display:none}
  .burger{display:grid}
}
@media (max-width:560px){
  .wrap{padding:0 20px}
  header .bar{height:64px;gap:8px}
  header.stuck .bar{height:58px}
  .brand{font-size:16.5px}
  .hero h1{font-size:clamp(2.1rem,9vw,2.7rem)}
  .card{padding:22px 20px}
  .qa summary{padding:17px 18px;gap:12px}
  .qa-body .inner{padding:0 18px 19px}
  .fabs{right:16px;bottom:16px}
  #cookie{left:16px;right:16px;bottom:16px;width:auto}
  /* keep the FAB stack clear of the banner while it is up */
  body.banner-up .fabs{bottom:calc(16px + 190px)}
  .pal{margin-top:0;width:100vw;height:100vh;border-radius:0;border:0}
  .pal-results{max-height:calc(100vh - 132px)}
}

/* ============================================================
   motion guard - every animation above degrades to static
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .reveal{opacity:1;transform:none}
  .lift{opacity:1;transform:none}
  .hero-art img,.hero-art .blob,.brand .dot{animation:none}
  #loader{animation:none;opacity:0;visibility:hidden}
  .progress i{transition:none}
}

/* ============================================================
   14. print stylesheet
   ============================================================ */
@media print{
  @page{margin:16mm 14mm}
  :root{
    --paper:#fff;--paper-dim:#fff;--paper-raise:#fff;
    --ink:#000;--gray:#222;--gray-soft:#444;
    --line:#bbb;--line-strong:#999;
    --green-deep:#000;--green-wash:#fff;
    --tile:#fff;--tile-line:#ccc;--tile-hover:#fff;
    --shadow:none;--shadow-lift:none;--shadow-pop:none;
  }
  html,body{background:#fff!important;color:#000!important}
  /* drop every piece of screen-only chrome */
  header,.grain,.progress,#loader,.fabs,#cookie,#palette,#drawer,.skip,
  .hero-art,.eyebrow,.hero-actions,.card .cta,.nf .nf-actions{
    display:none!important;
  }
  .reveal,.lift{opacity:1!important;transform:none!important;animation:none!important}
  .wrap{max-width:none;padding:0}
  .hero{padding:0 0 18pt}
  .hero .grid{display:block}
  .hero h1{font-size:26pt;line-height:1.1}
  .lede{font-size:11pt;max-width:none;margin:10pt 0 0}
  .section{padding:16pt 0;break-inside:avoid}
  .section .head h2{font-size:16pt}
  .brands{padding:12pt 0}
  .brand-row{grid-template-columns:repeat(4,1fr);gap:8pt}
  .brand-card{min-height:0;padding:8pt;border:1px solid #ccc}
  .brand-card img{filter:grayscale(1) opacity(.85);max-height:30pt}
  .bento{display:block}
  .card{
    border:1px solid #bbb!important;background:#fff!important;
    padding:10pt 12pt;margin-bottom:9pt;break-inside:avoid;
    box-shadow:none!important;
  }
  .card::after{display:none}
  .card h3,.card.feature h3{font-size:13pt}
  .card p{font-size:10pt;color:#222}
  .status{color:#000;font-size:8pt}
  /* JS forces every <details> open before printing; this styles the result */
  .qa{border:1px solid #bbb!important;box-shadow:none!important;break-inside:avoid;margin-bottom:8pt}
  .qa summary{padding:8pt 10pt;font-size:11.5pt}
  .qa summary .chev{display:none}
  .qa-body{height:auto!important;overflow:visible!important}
  .qa-body .inner{padding:0 10pt 9pt;font-size:10pt;color:#222;max-width:none}
  /* print the destination of every real link, since a click is not an option */
  main a[href^="http"]::after{
    content:" (" attr(href) ")";
    font-size:8.5pt;color:#555;word-break:break-all;font-weight:400;
  }
  main a[href^="#"]::after{content:""}
  footer{border-top:1px solid #bbb;padding:10pt 0 0;margin-top:14pt}
  footer .flinks a::after{content:""}
  .nf .code{-webkit-text-stroke:1px #999;font-size:60pt}
}

/* Bengali: taller lines so matras above and below the headline never clip */
html[lang="bn"] h1,html[lang="bn"] h2,html[lang="bn"] h3{line-height:1.35}
html[lang="bn"] body{line-height:1.75}