/* ============================================================
   Dogachi Studio — "Nakshi Kantha" quilt theme
   Colours live in :root. Change them here to restyle the site.
   ============================================================ */
:root{
  /* Galaxy theme: deep space behind, quilt patches floating in front */
  --space:#05061A;
  --paper:#0B0D2A; --paper-2:#14163A; --card:rgba(22,22,62,.82);
  --ink:#F2ECFF; --muted:#B9B3DA; --line:#9B8CFF;
  --teal:#13706A; --brick:#B9452F; --mustard:#E9B23A; --leaf:#4F7E33;
  --on-dark:#FFF7E6;
  --sky1:#1A1150; --sky2:#3B1F6E; --sun:#FFF2C9;
  --radius:16px; --shadow:5px 5px 0 var(--line), 0 0 28px rgba(140,110,255,.28);
  --f-body:"Hind Siliguri",system-ui,"Noto Sans KR","Malgun Gothic",sans-serif;
  --f-head:"Tiro Bangla","Hind Siliguri",Georgia,serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{
  margin:0;font-family:var(--f-body);font-size:17px;line-height:1.7;color:var(--ink);
  background-color:var(--space);
  padding-bottom:84px;
}
@media (min-width:900px){body{padding-bottom:0}}
img,svg,video{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--f-head);font-weight:400;line-height:1.25;margin:.2em 0 .45em}
h1{font-size:clamp(1.9rem,6vw,3.2rem)}
h2{font-size:clamp(1.3rem,3.6vw,1.75rem)}
h3{font-size:1.2rem}
p{margin:.4em 0 .9em}
:focus-visible{outline:3px solid var(--mustard);outline-offset:3px;border-radius:6px}

/* language switch: only one language shows at a time */
html[data-lang="bn"] .en, html[data-lang="en"] .bn{display:none!important}

.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--paper);padding:8px 12px;border-radius:8px;z-index:99}
.skip:focus{left:8px}

/* ---------- patch: the quilt square used everywhere ---------- */
.patch{
  position:relative;background:var(--card);border:2.5px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;
}
.patch::before{ /* the running stitch */
  content:"";position:absolute;inset:7px;border:1.6px dashed currentColor;opacity:.28;
  border-radius:calc(var(--radius) - 6px);pointer-events:none;
}
.p-teal{background:var(--teal);color:var(--on-dark)}
.p-brick{background:var(--brick);color:var(--on-dark)}
.p-leaf{background:var(--leaf);color:var(--on-dark)}
.p-mustard{background:var(--mustard);color:#1D2626}
.kicker{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin:0 0 .3em;opacity:.85}
.kicker::before{content:"✦ "}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.4em;font:600 1rem/1 var(--f-body);
  padding:.8em 1.2em;border:2.5px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);
  text-decoration:none;box-shadow:3px 3px 0 var(--line);cursor:pointer;transition:transform .12s,box-shadow .12s;
}
.btn:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--line)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--line)}
.btn-ink{background:var(--ink);color:var(--paper)}
.btn-sm{font-size:.9rem;padding:.6em 1em}
.btn[aria-disabled="true"]{opacity:.6;pointer-events:none}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}

/* ---------- header ---------- */
.top{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:14px;
  padding:10px 16px;background:color-mix(in srgb,var(--paper) 92%,transparent);
  backdrop-filter:blur(8px);border-bottom:2.5px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;margin-right:auto}
.logo-mark{width:42px;height:42px;flex:none}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-txt b{font-family:var(--f-head);font-weight:400;font-size:1.2rem}
.brand-txt small{font-size:.75rem;color:var(--muted)}
.brand.small .logo-mark{width:34px;height:34px}
.brand.small b{font-family:var(--f-head);font-weight:400;font-size:1.1rem}
.main-nav{display:none;gap:4px}
.main-nav a{display:flex;align-items:center;gap:6px;padding:8px 12px;border-radius:999px;text-decoration:none;font-weight:500;border:2px solid transparent}
.main-nav a svg{width:18px;height:18px}
.main-nav a:hover{border-color:var(--line)}
.main-nav a.on{background:var(--ink);color:var(--paper)}
@media (min-width:900px){.main-nav{display:flex}}
.lang-btn{font:700 .9rem var(--f-body);width:48px;height:40px;border-radius:12px;border:2.5px solid var(--line);background:var(--mustard);color:#1D2626;cursor:pointer;box-shadow:2px 2px 0 var(--line)}

/* ---------- mobile tab bar ---------- */
.tabbar{
  position:fixed;left:10px;right:10px;bottom:10px;z-index:30;display:grid;grid-template-columns:repeat(6,1fr);
  background:var(--ink);border-radius:20px;padding:6px;box-shadow:0 6px 0 var(--mustard);
}
.tabbar a{display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--paper);text-decoration:none;font-size:.7rem;padding:6px 0;border-radius:14px;opacity:.75}
.tabbar a svg{width:22px;height:22px}
.tabbar a.on{background:var(--mustard);color:#1D2626;opacity:1}
@media (min-width:900px){.tabbar{display:none}}

/* ---------- layout ---------- */
main{max-width:1120px;margin:0 auto;padding:22px 16px 40px;display:flex;flex-direction:column;gap:28px}

/* hero */
.hero{display:grid;gap:18px;overflow:hidden;padding:26px}
.hero h1{margin-top:.1em}
.hero-art{border:2.5px solid var(--line);border-radius:14px;width:100%;height:auto}
@media (min-width:760px){.hero{grid-template-columns:1.1fr 1fr;align-items:center;padding:36px}}
.boat{animation:bob 4s ease-in-out infinite;transform-origin:255px 205px}
.waves{animation:drift 6s linear infinite}
@keyframes bob{50%{transform:translateY(-5px) rotate(-1.5deg)}}
@keyframes drift{50%{transform:translateX(-10px)}}

/* quilt grid on home */
.quilt{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.quilt .patch{min-width:0}
.q-word,.q-streak,.q-riddle{grid-column:span 2}
.q-link:last-child{grid-column:span 2}
@media (min-width:760px){
  .quilt{grid-template-columns:repeat(6,1fr)}
  .q-word{grid-column:span 3;grid-row:span 2}
  .q-streak{grid-column:span 3}
  .q-riddle{grid-column:span 3}
  .q-link{grid-column:span 2}
}
.q-link{display:block;text-decoration:none;transition:transform .15s}
.q-link:hover{transform:rotate(-1deg) translateY(-3px)}
.q-link:nth-child(even):hover{transform:rotate(1deg) translateY(-3px)}
.q-link h2{font-size:1.2rem;margin:.4em 0 .1em}
.q-link p{font-size:.9rem;margin:0;opacity:.85}
.big-ic svg{width:34px;height:34px}
.wod{display:flex;flex-direction:column;gap:2px;margin:6px 0 14px}
.wod-lang{font-size:.8rem;font-weight:600;background:#1D2626;color:var(--mustard);align-self:flex-start;padding:2px 10px;border-radius:999px}
.wod-word{font-size:clamp(2.4rem,9vw,3.6rem);line-height:1.2;font-weight:600}
.wod-say{font-size:1.05rem;opacity:.85}
.wod-mean{font-family:var(--f-head);font-size:1.4rem}
.stamps{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.stamp{width:36px;height:36px;border-radius:50%;border:2px dashed var(--on-dark);display:grid;place-items:center;font-size:.75rem;opacity:.5}
.stamp.got{background:var(--mustard);color:#1D2626;border:2px solid #1D2626;opacity:1;transform:rotate(-8deg)}
.streak-txt{margin:0;font-weight:500}
details summary{cursor:pointer;font-weight:600;list-style:none}
details summary::before{content:"▸ "}
details[open] summary::before{content:"▾ "}
.riddle-q{font-family:var(--f-head);font-size:1.2rem}

/* shelves & cards */
.shelf-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.shelf-head a{font-weight:600}
.cards{display:grid;gap:16px}
@media (min-width:700px){.cards{grid-template-columns:repeat(2,1fr)}}
.card{display:block;text-decoration:none}
.card:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--line)}
.card,.q-link{transition:transform .15s,box-shadow .15s}
.tag{display:inline-block;font-size:.75rem;font-weight:600;padding:2px 10px;border-radius:999px;border:2px solid currentColor}
.shop-teaser{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
.page-head h1{margin-bottom:.2em}

/* ads — always labelled, never pushing content around too much */
.ad-slot{text-align:center;padding:10px 0;border-top:2px dashed color-mix(in srgb,var(--ink) 30%,transparent);border-bottom:2px dashed color-mix(in srgb,var(--ink) 30%,transparent)}
.ad-label{display:block;font-size:.7rem;letter-spacing:.12em;color:var(--muted);margin-bottom:6px}
.ad-body{display:flex;justify-content:center;min-height:50px}
.ad-body iframe{border:0;max-width:100%}

/* videos */
.chips{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 8px;scrollbar-width:none}
.chip{flex:none;font:600 .95rem var(--f-body);padding:8px 16px;border-radius:999px;border:2.5px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer}
.chip.on{background:var(--ink);color:var(--paper)}
.vgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media (min-width:700px){.vgrid{grid-template-columns:repeat(4,1fr)}}
.vcard{padding:0;overflow:hidden;cursor:pointer;text-align:left;font:inherit;color:inherit}
.vcard::before{z-index:2}
.vthumb{aspect-ratio:9/16;display:grid;place-items:center;position:relative;border-bottom:2.5px solid var(--line)}
.vthumb img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.vthumb .play{position:relative;width:54px;height:54px;border-radius:50%;background:var(--paper);border:2.5px solid var(--line);display:grid;place-items:center;font-size:1.3rem;color:var(--ink)}
.vthumb .dur{position:absolute;right:10px;bottom:10px;background:#1D2626;color:#fff;font-size:.75rem;padding:1px 8px;border-radius:999px}
.vthumb .soon{position:absolute;left:10px;top:10px;background:var(--paper);color:var(--ink);font-size:.75rem;font-weight:600;padding:1px 8px;border-radius:999px;border:2px solid var(--line)}
.vmeta{padding:10px 12px 14px}
.vmeta h3{font-size:1rem;margin:0}
.player{border:2.5px solid var(--line);border-radius:18px;padding:14px;background:var(--card);color:var(--ink);max-width:min(420px,94vw);width:100%}
.player::backdrop{background:rgba(10,15,15,.8)}
.player video{width:100%;aspect-ratio:9/16;background:#000;border-radius:10px}
.player .close{float:right;border:2px solid var(--line);background:var(--mustard);border-radius:50%;width:36px;height:36px;cursor:pointer;margin-bottom:8px;color:#1D2626}
.player-title{font-size:1.1rem;margin:.6em 0 0}

/* learn */
.toc{display:flex;gap:8px;flex-wrap:wrap}
.toc a{padding:6px 14px;border-radius:999px;border:2.5px solid var(--line);text-decoration:none;font-weight:600;background:var(--card)}
.lesson{scroll-margin-top:80px}
.flips{display:grid;grid-template-columns:repeat(auto-fill,minmax(88px,1fr));gap:10px;margin:10px 0 22px}
.flips.wide{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.flip{position:relative;min-height:96px;border:2.5px solid var(--line);border-radius:14px;background:var(--card);color:var(--ink);box-shadow:3px 3px 0 var(--line);cursor:pointer;font:inherit;padding:8px;perspective:600px}
.flip span{position:absolute;inset:0;display:grid;place-items:center;padding:8px;text-align:center;backface-visibility:hidden;transition:transform .35s}
.f-front{font-size:2.2rem;font-weight:600}
.flips.wide .f-front{font-size:1.1rem}
.f-back{transform:rotateY(180deg);font-size:.95rem;font-weight:500;background:var(--mustard);color:#1D2626;border-radius:11px}
.flip.turned .f-front{transform:rotateY(180deg)}
.flip.turned .f-back{transform:rotateY(360deg)}
[lang="ar"]{font-family:"Noto Naskh Arabic","Geeza Pro","Traditional Arabic",serif;direction:rtl}
.tip{margin-top:6px}
.table-wrap{overflow-x:auto;border:2.5px solid var(--line);border-radius:14px;background:var(--card);box-shadow:3px 3px 0 var(--line)}
table{border-collapse:collapse;width:100%}
@media (max-width:520px){th,td{padding:8px;font-size:.92rem}}
th,td{padding:10px 12px;border-bottom:1.5px dashed color-mix(in srgb,var(--ink) 30%,transparent);text-align:left;vertical-align:top}
th{background:var(--ink);color:var(--paper);font-weight:600}
tr:last-child td{border-bottom:0}
.say{border:2px solid var(--line);background:var(--mustard);border-radius:8px;cursor:pointer;padding:0 6px;color:#1D2626}

/* apps */
.app-list{display:grid;gap:16px}
.app{display:flex;gap:16px;align-items:flex-start}
.app-ic{flex:none;width:64px;height:64px;border-radius:18px;background:var(--paper);color:var(--ink);border:2.5px solid var(--line);display:grid;place-items:center}
.app-ic svg{width:32px}

/* shop */
.products{display:grid;gap:18px}
@media (min-width:700px){.products{grid-template-columns:repeat(2,1fr)}}
.product{display:flex;flex-direction:column}
.prod-art{height:130px;border:2.5px solid var(--line);border-radius:12px;display:grid;place-items:center;margin-bottom:12px;background-image:repeating-linear-gradient(45deg,transparent 0 12px,rgba(0,0,0,.08) 12px 14px)}
.prod-art .logo-mark{width:70px;height:70px}
.product p{flex:1}
.buy{display:flex;justify-content:space-between;align-items:center;gap:10px}
.price{font-family:var(--f-head);font-size:1.6rem;font-weight:400}
.faq details{padding:10px 0;border-bottom:1.5px dashed color-mix(in srgb,var(--ink) 30%,transparent)}

/* articles */
.post{display:flex;flex-direction:column;gap:22px;max-width:760px;margin:0 auto;width:100%}
.post-body{font-size:1.06rem}
.post-body h2{margin-top:1.2em}
.post-body ol,.post-body ul{padding-left:1.3em}
.post-body li{margin:.35em 0}
.meta{font-size:.9rem;opacity:.8;margin:0}
.en-note{margin-bottom:10px}
.prose{max-width:760px}

/* footer */
.foot{background:var(--ink);color:var(--paper);margin-top:30px;padding:0 16px 20px}
.foot-stitch{height:14px;background:repeating-linear-gradient(90deg,var(--mustard) 0 14px,transparent 14px 22px);background-size:22px 3px;background-repeat:repeat-x;background-position:0 6px}
.foot-grid{max-width:1120px;margin:0 auto;padding-top:20px;display:grid;gap:20px}
@media (min-width:700px){.foot-grid{grid-template-columns:2fr 1fr}}
.foot-links{display:flex;flex-direction:column;gap:6px}
.foot .brand.small{display:flex;align-items:center;gap:10px}
.foot .logo-mark{--line:#0A1110}
.copy{max-width:1120px;margin:14px auto 0;font-size:.85rem;opacity:.7}
.nf{text-align:center}
.nf .btn{margin-top:10px}

/* ---------- galaxy background ---------- */
body::before{ /* nebula clouds */
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(ellipse 60% 45% at 15% 12%, rgba(124,58,237,.42), transparent 70%),
    radial-gradient(ellipse 55% 40% at 88% 35%, rgba(14,165,233,.30), transparent 70%),
    radial-gradient(ellipse 60% 45% at 35% 88%, rgba(219,39,119,.26), transparent 70%),
    radial-gradient(ellipse 35% 25% at 70% 75%, rgba(233,178,58,.14), transparent 70%),
    linear-gradient(160deg,#070826 0%,#05061A 55%,#0A0420 100%);
  animation:nebula 40s ease-in-out infinite alternate;
}
@keyframes nebula{to{filter:hue-rotate(25deg) brightness(1.1)}}
#stars{position:fixed;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none}
.patch{backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.top{background:rgba(8,8,32,.72);border-bottom-color:rgba(155,140,255,.45)}
.btn{box-shadow:3px 3px 0 var(--line)}
.btn-ink{background:var(--mustard);color:#1D2626}
.tabbar{background:rgba(12,12,40,.88);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1.5px solid rgba(155,140,255,.5);box-shadow:0 0 24px rgba(124,58,237,.45)}
.tabbar a{color:var(--ink)}
.foot{background:rgba(4,4,20,.85);color:var(--ink);border-top:1.5px solid rgba(155,140,255,.4)}
th{background:#2A1F66;color:var(--ink)}
.hero-art .sun{filter:drop-shadow(0 0 12px rgba(255,242,201,.8))}
.chip.on,.main-nav a.on{background:var(--ink);color:#0B0D2A}
.card[hidden]{display:none}
.post > .btn{align-self:flex-start}