.ibsf{--bg:#FAF6F4;--surface:#fff;--ink:#2B2430;--accent:#B3184F;--blush:#F6DDE6;--muted:#7A6F76;--line:#EAE1E4;--ok:#1F7A55;--warn:#9A5B00;max-width:720px;margin:0 auto;color:var(--ink);font-family:'Work Sans',sans-serif;font-size:16px;line-height:1.6;-webkit-tap-highlight-color:transparent}
.ibsf *{box-sizing:border-box}
.ibsf.bn{font-family:'Hind Siliguri','Work Sans',sans-serif}
.ibsf h1,.ibsf h2,.ibsf h3{font-family:'Playfair Display',serif;font-weight:600;line-height:1.15;color:var(--ink);margin:0}
.ibsf.bn h1,.ibsf.bn h2,.ibsf.bn h3{font-family:'Noto Serif Bengali','Playfair Display',serif;line-height:1.35}
.ibsf h1{font-size:clamp(28px,6vw,40px)}
.ibsf h2{font-size:clamp(23px,5vw,30px)}
.ibsf h3{font-size:19px}
.ibsf p{margin:0}
.ibsf-top{display:flex;align-items:center;gap:12px;margin-bottom:18px;min-height:40px}
.ibsf-back{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--ink);width:40px;height:40px;border-radius:999px;font-size:18px;cursor:pointer;flex:none;display:flex;align-items:center;justify-content:center;padding:0}
.ibsf-back[hidden]{display:none}
.ibsf-back:hover{border-color:var(--ink)}
.ibsf-prog{flex:1;height:6px;background:var(--line);border-radius:999px;overflow:hidden}
.ibsf-prog i{display:block;height:100%;width:0;background:var(--accent);border-radius:999px;transition:width .45s cubic-bezier(.2,.7,.2,1)}
.ibsf-lang{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:8px 14px;font-size:13px;font-weight:500;cursor:pointer;flex:none;font-family:'Work Sans','Hind Siliguri',sans-serif}
.ibsf-lang:hover{border-color:var(--ink)}
.ibsf-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:clamp(20px,5vw,36px)}
.ibsf-screen{animation:ibsfIn .4s cubic-bezier(.2,.7,.2,1) both}
@keyframes ibsfIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.ibsf-eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:10px}
.ibsf.bn .ibsf-eyebrow{letter-spacing:.02em;font-size:14px}
.ibsf-sub{color:#4A4150;margin-top:10px;max-width:56ch}
.ibsf-note{font-size:13.5px;color:var(--muted);margin-top:14px;display:flex;gap:8px;align-items:flex-start}
.ibsf-note svg{flex:none;margin-top:3px}
.ibsf-choices{display:grid;gap:12px;margin-top:24px}
.ibsf-choice{appearance:none;text-align:left;border:1px solid var(--line);background:var(--surface);border-radius:14px;padding:16px 18px;cursor:pointer;display:flex;gap:14px;align-items:center;color:var(--ink);font:inherit;transition:border-color .15s,background .15s,transform .15s;width:100%}
.ibsf-choice:hover{border-color:var(--accent)}
.ibsf-choice:active{transform:scale(.99)}
.ibsf-choice.on{border-color:var(--accent);background:#FDF3F6}
.ibsf-choice b{display:block;font-weight:600;font-size:16.5px;line-height:1.35}
.ibsf-choice>span:not(.ibsf-ico){display:block;flex:1;min-width:0}
.ibsf-choice b~span{display:block;font-size:14px;font-weight:400;color:var(--muted);line-height:1.45;margin-top:2px}
.ibsf-ico{flex:none;width:46px;height:46px;border-radius:999px;background:var(--blush);display:flex;align-items:center;justify-content:center;color:var(--accent)}
.ibsf-tag{display:inline-block;font-size:11.5px;font-weight:600;background:var(--accent);color:#fff;border-radius:999px;padding:2px 9px;margin-left:8px;vertical-align:middle;letter-spacing:.02em}
.ibsf-measure{display:grid;gap:22px;margin-top:20px}
@media(min-width:640px){.ibsf-measure{grid-template-columns:230px 1fr;align-items:center}}
.ibsf-fig{background:var(--bg);border-radius:14px;padding:10px;display:flex;justify-content:center}
.ibsf-fig svg{width:100%;max-width:210px;height:auto;display:block}
.ibsf-tape{stroke-dasharray:240;stroke-dashoffset:240;animation:ibsfTape 3.2s cubic-bezier(.4,0,.2,1) infinite}
@keyframes ibsfTape{0%{stroke-dashoffset:240}45%,85%{stroke-dashoffset:0}100%{stroke-dashoffset:0;opacity:0}}
.ibsf-pulse{animation:ibsfPulse 1.6s ease-in-out infinite;transform-origin:center;transform-box:fill-box}
@keyframes ibsfPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.35);opacity:.55}}
.ibsf-steps{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.ibsf-steps li{display:flex;gap:10px;font-size:15px;line-height:1.5}
.ibsf-steps li i{flex:none;width:22px;height:22px;border-radius:999px;background:var(--blush);color:var(--accent);font-style:normal;font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:1px;font-family:'Work Sans',sans-serif}
.ibsf-input{margin-top:22px;background:var(--bg);border-radius:14px;padding:18px}
.ibsf-readrow{display:flex;align-items:center;justify-content:space-between;gap:10px}
.ibsf-read{font-family:'Playfair Display',serif;font-size:44px;font-weight:600;line-height:1;font-variant-numeric:tabular-nums}
.ibsf-read small{font-family:'Work Sans',sans-serif;font-size:16px;font-weight:500;color:var(--muted);margin-left:6px}
.ibsf-unit{display:inline-flex;border:1px solid var(--line);border-radius:999px;background:var(--surface);padding:3px}
.ibsf-unit button{appearance:none;border:0;background:transparent;border-radius:999px;padding:6px 14px;font:500 13px 'Work Sans',sans-serif;color:var(--muted);cursor:pointer}
.ibsf-unit button.on{background:var(--ink);color:#fff}
.ibsf-sliderrow{display:flex;align-items:center;gap:12px;margin-top:16px}
.ibsf-pm{appearance:none;flex:none;width:46px;height:46px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:24px;line-height:1;color:var(--ink);cursor:pointer;padding:0}
.ibsf-pm:hover{border-color:var(--ink)}
.ibsf input[type=range]{-webkit-appearance:none;appearance:none;flex:1;height:6px;border-radius:999px;background:var(--line);outline:none;min-width:0;padding:0;border:0}
.ibsf input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:30px;height:30px;border-radius:50%;background:var(--accent);border:4px solid #fff;box-shadow:0 1px 6px rgba(120,20,60,.3);cursor:pointer}
.ibsf input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--accent);border:4px solid #fff;box-shadow:0 1px 6px rgba(120,20,60,.3);cursor:pointer}
.ibsf-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px;align-items:center}
.ibsf-btn{appearance:none;border:0;background:var(--accent);color:#fff;border-radius:999px;padding:14px 28px;font:600 16px 'Work Sans','Hind Siliguri',sans-serif;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:8px;transition:background .15s,transform .15s}
.ibsf-btn:hover{background:#96123F;color:#fff}
.ibsf-btn:active{transform:scale(.98)}
.ibsf-btn[disabled]{background:#D9C9CF;cursor:not-allowed}
.ibsf-btn.ghost{background:var(--blush);color:var(--ink)}
.ibsf-btn.ghost:hover{background:#EFC9D7;color:var(--ink)}
.ibsf-link{appearance:none;background:none;border:0;padding:0;color:var(--ink);text-decoration:underline;text-underline-offset:4px;font:500 15px 'Work Sans','Hind Siliguri',sans-serif;cursor:pointer}
.ibsf-q{margin-top:22px}
.ibsf-q>p{font-weight:600;margin-bottom:10px}
.ibsf-chips{display:flex;flex-wrap:wrap;gap:8px}
.ibsf-chip{appearance:none;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:10px 16px;font:500 15px 'Work Sans','Hind Siliguri',sans-serif;color:var(--ink);cursor:pointer;transition:all .15s;line-height:1.3}
.ibsf-chip:hover{border-color:var(--accent)}
.ibsf-chip.on{background:var(--ink);border-color:var(--ink);color:#fff}
.ibsf-chip.sq{min-width:54px;text-align:center}
.ibsf-result-head{text-align:center;padding:6px 0 4px}
.ibsf-size{font-family:'Playfair Display',serif;font-weight:600;font-size:clamp(72px,20vw,112px);line-height:1;color:var(--accent);margin:10px 0 6px;display:inline-flex;gap:2px}
.ibsf-size span{display:inline-block;animation:ibsfPop .6s cubic-bezier(.2,1.4,.4,1) both}
.ibsf-size span:nth-child(2){animation-delay:.12s}.ibsf-size span:nth-child(3){animation-delay:.24s}.ibsf-size span:nth-child(4){animation-delay:.36s}
@keyframes ibsfPop{from{opacity:0;transform:translateY(24px) scale(.7)}to{opacity:1;transform:none}}
.ibsf-meta{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:10px}
.ibsf-pill{font-size:13.5px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:5px 12px;color:#4A4150}
.ibsf-pill b{color:var(--ink);font-weight:600}
.ibsf-verdict{margin-top:22px;border-radius:14px;padding:16px 18px;display:flex;gap:12px;align-items:flex-start;font-size:15px;line-height:1.55}
.ibsf-verdict svg{flex:none;margin-top:2px}
.ibsf-verdict.great{background:#EAF5EF;color:#174F3A}
.ibsf-verdict.close{background:#FFF4E0;color:#6B4200}
.ibsf-verdict.none{background:var(--blush);color:var(--ink)}
.ibsf-verdict b{display:block;font-size:16px;margin-bottom:2px}
.ibsf-sec{margin-top:34px}
.ibsf-sec>h3{margin-bottom:6px}
.ibsf-sec>p.ibsf-lead{color:var(--muted);font-size:14.5px;margin-bottom:16px}
.ibsf-prods{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media(min-width:640px){.ibsf-prods{grid-template-columns:repeat(3,1fr);gap:18px}}
.ibsf-prod{display:flex;flex-direction:column;text-decoration:none;color:var(--ink);animation:ibsfIn .5s both}
.ibsf-prod:nth-child(2){animation-delay:.06s}.ibsf-prod:nth-child(3){animation-delay:.12s}.ibsf-prod:nth-child(4){animation-delay:.18s}.ibsf-prod:nth-child(5){animation-delay:.24s}.ibsf-prod:nth-child(6){animation-delay:.3s}
.ibsf-prod .im{position:relative;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--bg);aspect-ratio:4/5}
.ibsf-prod img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.ibsf-prod:hover img{transform:scale(1.03)}
.ibsf-fit{position:absolute;left:8px;top:8px;font-size:11.5px;font-weight:600;border-radius:999px;padding:4px 9px;background:#fff;color:var(--ok);border:1px solid #CFE6DA;line-height:1.3}
.ibsf-fit.close{color:var(--warn);border-color:#F1DDB5}
.ibsf-prod .nm{font-family:'Playfair Display',serif;font-weight:600;font-size:15.5px;line-height:1.25;margin-top:10px}
.ibsf-prod .why{font-size:13px;color:var(--muted);line-height:1.4;margin-top:3px}
.ibsf-prod .pr{font-size:14.5px;margin-top:5px}
.ibsf-prod .pr del{color:#9A9097;margin-right:6px}
.ibsf-prod .go{margin-top:8px;align-self:flex-start;font-size:12.5px;font-weight:500;border:1px solid #E3D9D6;border-radius:999px;padding:6px 13px}
.ibsf-prod:hover .go{background:var(--ink);border-color:var(--ink);color:#fff}
.ibsf-skel{border-radius:14px;background:linear-gradient(90deg,#F1EAE7 25%,#F8F3F1 37%,#F1EAE7 63%);background-size:400% 100%;animation:ibsfSk 1.3s ease infinite;aspect-ratio:4/5}
@keyframes ibsfSk{0%{background-position:100% 50%}100%{background-position:0 50%}}
.ibsf-tips{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.ibsf-tips li{padding:14px 0;border-bottom:1px solid var(--line);display:flex;gap:12px;font-size:15px;line-height:1.55}
.ibsf-tips li svg{flex:none;color:var(--accent);margin-top:3px}
.ibsf-fine{font-size:13px;color:var(--muted);margin-top:22px;line-height:1.55}
@media(prefers-reduced-motion:reduce){.ibsf *,.ibsf-screen{animation:none!important;transition:none!important}.ibsf-tape{stroke-dashoffset:0}}
.ibsf-pn{margin:14px 0;border:1px solid #EAE1E4;border-radius:14px;padding:12px 14px;font:400 14.5px/1.5 'Work Sans','Hind Siliguri',sans-serif;color:#2B2430;background:#fff;display:flex;gap:10px;align-items:flex-start}
.ibsf-pn.great{background:#EAF5EF;border-color:#CFE6DA;color:#174F3A}
.ibsf-pn.close{background:#FFF4E0;border-color:#F1DDB5;color:#6B4200}
.ibsf-pn.none{background:#F6DDE6;border-color:#EBC3D1}
.ibsf-pn a{color:inherit;font-weight:600;text-decoration:underline;text-underline-offset:3px}
.ibsf-pn b{font-weight:600}

/* theme button resets */
#ibsf-root button{text-transform:none;letter-spacing:0;box-shadow:none;text-shadow:none;min-height:0;font-weight:500}
#ibsf-root .ibsf-choice,#ibsf-root .ibsf-choice:hover,#ibsf-root .ibsf-choice:focus{background:#fff;color:#2B2430;border:1px solid #EAE1E4;border-radius:14px;padding:16px 18px;white-space:normal}
#ibsf-root .ibsf-choice:hover{border-color:#B3184F}
#ibsf-root .ibsf-choice.on{border-color:#B3184F;background:#FDF3F6}
#ibsf-root .ibsf-choice b{font-weight:600;color:#2B2430}
#ibsf-root .ibsf-back,#ibsf-root .ibsf-back:hover,#ibsf-root .ibsf-back:focus{background:#fff;color:#2B2430;border:1px solid #EAE1E4;border-radius:999px;padding:0;width:40px;height:40px}
#ibsf-root .ibsf-lang,#ibsf-root .ibsf-lang:hover,#ibsf-root .ibsf-lang:focus{background:#fff;color:#2B2430;border:1px solid #EAE1E4;border-radius:999px;padding:8px 14px;font-size:13px}
#ibsf-root .ibsf-lang:hover,#ibsf-root .ibsf-back:hover{border-color:#2B2430}
#ibsf-root .ibsf-unit button,#ibsf-root .ibsf-unit button:hover,#ibsf-root .ibsf-unit button:focus{background:transparent;color:#7A6F76;border:0;border-radius:999px;padding:6px 14px;font-size:13px}
#ibsf-root .ibsf-unit button.on{background:#2B2430;color:#fff}
#ibsf-root .ibsf-pm,#ibsf-root .ibsf-pm:hover,#ibsf-root .ibsf-pm:focus{background:#fff;color:#2B2430;border:1px solid #EAE1E4;border-radius:999px;padding:0;width:46px;height:46px;font-size:24px;line-height:1}
#ibsf-root .ibsf-pm:hover{border-color:#2B2430}
#ibsf-root .ibsf-chip,#ibsf-root .ibsf-chip:focus{background:#fff;color:#2B2430;border:1px solid #EAE1E4;border-radius:999px;padding:10px 16px;font-size:15px;white-space:normal}
#ibsf-root .ibsf-chip:hover{background:#fff;color:#2B2430;border-color:#B3184F}
#ibsf-root .ibsf-chip.on,#ibsf-root .ibsf-chip.on:hover{background:#2B2430;border-color:#2B2430;color:#fff}
#ibsf-root .ibsf-btn,#ibsf-root .ibsf-btn:focus{background:#B3184F;color:#fff;border:0;border-radius:999px;padding:14px 28px;font-size:16px;font-weight:600}
#ibsf-root .ibsf-btn:hover{background:#96123F;color:#fff}
#ibsf-root .ibsf-btn[disabled],#ibsf-root .ibsf-btn[disabled]:hover{background:#D9C9CF;color:#fff}
#ibsf-root .ibsf-link,#ibsf-root .ibsf-link:hover,#ibsf-root .ibsf-link:focus{background:none;color:#2B2430;border:0;padding:0;border-radius:0;text-decoration:underline;font-size:15px}
#ibsf-root a.ibsf-prod,#ibsf-root a.ibsf-prod:hover{text-decoration:none;color:#2B2430}
#ibsf-root ol.ibsf-steps,#ibsf-root ul.ibsf-tips{margin:0;padding:0;list-style:none}

@media(max-width:639px){.ibsf-fig svg{max-width:150px}.ibsf-measure{gap:16px;margin-top:16px}.ibsf-input{margin-top:16px;padding:14px 16px}.ibsf-read{font-size:38px}}

/* v2: two-view figure + mobile polish */
.ibsf-fig{display:grid;grid-template-columns:1.6fr 1fr;gap:6px 10px;align-items:end;padding:14px 12px 12px}
.ibsf-fig figure{margin:0;text-align:center}
.ibsf-fig svg{max-width:none;width:100%;height:auto}
.ibsf-fig figure:nth-child(1) svg{max-width:190px;margin:0 auto}
.ibsf-fig figure:nth-child(2) svg{max-width:112px;margin:0 auto}
.ibsf-fig figcaption{font-size:12px;color:var(--muted);margin-top:4px;line-height:1.3}
.ibsf-level{grid-column:1/-1;font-size:13px;line-height:1.45;color:#4A4150;text-align:center;border-top:1px dashed #E3CBD4;padding-top:9px;margin-top:4px}
@keyframes ibsfTape{0%{stroke-dashoffset:240;opacity:1}40%,88%{stroke-dashoffset:0;opacity:1}100%{stroke-dashoffset:0;opacity:0}}
@media(min-width:640px){.ibsf-measure{grid-template-columns:300px 1fr}}
.ibsf input[type=range]{height:34px;background:transparent;margin:0}
.ibsf input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:999px;background:var(--line)}
.ibsf input[type=range]::-webkit-slider-thumb{margin-top:-12px}
.ibsf input[type=range]::-moz-range-track{height:6px;border-radius:999px;background:var(--line)}
.ibsf input[type=range]:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:999px}
#ibsf-root button:focus-visible,#ibsf-root a:focus-visible{outline:2px solid #B3184F;outline-offset:2px}
@media(max-width:639px){
.ibsf{font-size:15.5px}
.ibsf-top{margin-bottom:12px;gap:10px}
.ibsf-card{padding:18px 16px 20px;border-radius:14px}
.ibsf h2{font-size:22px}
.ibsf.bn h2{font-size:21px}
.ibsf-eyebrow{margin-bottom:6px}
.ibsf-measure{gap:12px;margin-top:12px}
.ibsf-fig{padding:10px 10px 10px}
.ibsf-fig svg{max-width:none}
.ibsf-fig figure:nth-child(1) svg{max-width:150px}
.ibsf-fig figure:nth-child(2) svg{max-width:88px}
.ibsf-steps{gap:6px}
.ibsf-steps li{font-size:14.5px;line-height:1.45}
.ibsf-input{margin-top:14px;padding:12px 14px}
.ibsf-read{font-size:36px}
.ibsf-sliderrow{margin-top:8px;gap:10px}
#ibsf-root .ibsf-unit button{padding:9px 16px;font-size:14px}
.ibsf-actions{margin-top:16px}
#ibsf-root .ibsf-actions .ibsf-btn{width:100%;justify-content:center;padding:15px 20px}
#ibsf-root .ibsf-actions .ibsf-link{margin:4px auto 0;padding:8px}
.ibsf-choices{margin-top:18px;gap:10px}
#ibsf-root .ibsf-choice{padding:14px 14px}
.ibsf-q{margin-top:18px}
#ibsf-root .ibsf-chip{padding:11px 15px}
.ibsf-verdict{padding:14px 14px;font-size:14.5px}
.ibsf-sec{margin-top:28px}
.ibsf-prod .nm{font-size:14.5px}
.ibsf-fit{font-size:11px;padding:3px 8px;left:6px;top:6px;max-width:calc(100% - 12px)}
.ibsf-tips li{font-size:14.5px;padding:12px 0}
.ibsf-pill{font-size:13px}
}
@media(max-width:639px){.ibsf-fig figure:nth-child(1) svg{max-width:132px}.ibsf-fig figure:nth-child(2) svg{max-width:78px}.ibsf-level{font-size:12.5px;padding-top:7px}.ibsf-screen>.ibsf-actions{position:sticky;bottom:calc(70px + env(safe-area-inset-bottom,0px));z-index:5;margin:10px -16px -20px;padding:14px 16px 16px;background:linear-gradient(to bottom,rgba(255,255,255,0),#fff 28%);border-radius:0 0 14px 14px}.ibsf-sec~.ibsf-actions{position:static;margin:22px 0 0;padding:0;background:none}}

@media(max-width:639px){.ibsf-top{margin-bottom:10px}.ibsf-card{padding-top:14px}.ibsf-eyebrow{margin-bottom:3px;font-size:11.5px}.ibsf.bn .ibsf-eyebrow{font-size:13px}.ibsf h2,.ibsf.bn h2{font-size:20px}.ibsf-measure{gap:10px;margin-top:10px}.ibsf-fig{padding:8px 10px}.ibsf-fig figure:nth-child(1) svg{max-width:120px}.ibsf-fig figure:nth-child(2) svg{max-width:71px}.ibsf-fig figcaption{font-size:11.5px;margin-top:2px}.ibsf-level{margin-top:2px;padding-top:6px;line-height:1.4}.ibsf-steps{gap:5px}.ibsf-steps li{font-size:14px;line-height:1.4;gap:8px}.ibsf-steps li i{width:20px;height:20px;font-size:11px}.ibsf-input{margin-top:10px;padding:10px 14px 8px}.ibsf-read{font-size:32px}.ibsf-read small{font-size:14px}.ibsf-sliderrow{margin-top:4px}#ibsf-root .ibsf-pm{width:42px;height:42px}#ibsf-root .ibsf-unit button{padding:7px 14px;font-size:13.5px}.ibsf-screen>.ibsf-actions{margin-top:4px;padding-top:10px}}