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#app{min-height:calc(100vh / var(--zf, 1));display:flex;flex-direction:column}.screen{display:none;flex:1;flex-direction:column;min-height:0}.screen.is-active{display:flex}.top{height:var(--header-h);display:flex;align-items:center;gap:14px;padding-inline:var(--gutter);border-bottom:1px solid var(--line);background:var(--sheet);position:sticky;top:0;z-index:20}.wordmark{display:inline-flex;align-items:baseline;gap:8px;text-decoration:none;white-space:nowrap}.brand-lockup{display:inline-flex;align-items:center;gap:12px}.brand-lockup .lockup-divider{opacity:.35;font-size:22px;font-weight:300;line-height:1;user-select:none}.iit-mandi-lockup{display:inline-flex;align-items:center;gap:8px;flex-shrink:0}.iit-mandi-logo{display:none;height:36px;width:auto;max-height:36px;object-fit:contain}.iit-mandi-name,.lab-institute{font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap}.institute-lockup{display:inline-flex;align-items:center;gap:8px;flex-shrink:0}.institute-lockup .iit-mandi-logo{display:none;height:36px;width:auto;max-height:36px;object-fit:contain}.institute-lockup .institute-name{font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap}@media(max-width:760px){.iit-mandi-logo,.institute-lockup .iit-mandi-logo{display:none!important}.iit-mandi-name,.institute-lockup .institute-name{font-size:14px;font-weight:700}.lab-lockup .iit-mandi-name{font-size:13px;font-weight:700}}.wordmark b{font-weight:800;font-size:var(--t2);letter-spacing:-.03em;font-variation-settings:"opsz" 96}.wordmark span{color:var(--ink-2);font-size:var(--t-1)}.top .spacer{flex:1}.crumbs{display:flex;align-items:center;gap:8px;color:var(--ink-2);font-size:var(--t-1);min-width:0}.crumbs .sep{color:var(--ink-3)}.crumbs h1{margin:0;min-width:0;font-size:inherit;line-height:inherit;letter-spacing:normal;color:var(--ink);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.btn{--bg: var(--sheet);--fg: var(--ink);--bd: var(--line);display:inline-flex;align-items:center;justify-content:center;gap:8px;height:var(--ctl);padding:0 14px;border:1px solid var(--bd);border-radius:var(--r0);background:var(--bg);color:var(--fg);font-weight:500;font-size:var(--t0);line-height:1;white-space:nowrap;text-decoration:none;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform 80ms var(--ease);user-select:none;-webkit-user-select:none}.btn:hover{--bg: var(--sheet-2);--bd: var(--ink-3)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.btn-primary{--bg: var(--ink);--fg: #fff;--bd: var(--ink)}.btn-primary:hover{--bg: var(--ink-hover);--bd: var(--ink-hover)}.btn-ghost{--bd: transparent;--bg: transparent}.btn-ghost:hover{--bg: var(--line-2);--bd: transparent}.btn-sm{height:var(--ctl-sm);padding:0 10px;font-size:var(--t-1)}.btn-lg{height:var(--ctl-lg);padding:0 20px;font-size:var(--t1)}.btn-icon{width:var(--ctl);padding:0}.btn-icon.btn-sm{width:var(--ctl-sm)}.btn svg{width:1.125rem;height:1.125rem;flex:none}.btn.is-on{--bg: var(--ink);--fg: #fff;--bd: var(--ink)}.btn.is-hold{--bg: var(--vermilion);--fg: #fff;--bd: var(--vermilion)}.field{display:flex;flex-direction:column;gap:6px;min-width:0}.field>label,.field-label{font-size:var(--t-1);color:var(--ink-2);font-weight:500;display:flex;justify-content:space-between;gap:8px}.field-label output{font-family:var(--mono);color:var(--ink);font-size:var(--t-1)}.field-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px 14px}.select{appearance:none;-webkit-appearance:none;height:var(--ctl);padding:0 34px 0 12px;border:1px solid var(--line);border-radius:var(--r0);background:var(--sheet) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'><path d='M3 5l4 4 4-4' fill='none' stroke='%231b2437' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/></svg>") no-repeat right 12px center;width:100%;min-width:0;font-weight:500}.select:hover{border-color:var(--ink-3)}.input{height:var(--ctl);padding:0 12px;width:100%;min-width:0;border:1px solid var(--line);border-radius:var(--r0);background:var(--sheet)}.input.num{text-align:right}.range{-webkit-appearance:none;appearance:none;width:100%;height:1.75rem;background:transparent;margin:0}.range::-webkit-slider-runnable-track{height:3px;background:var(--line);border-radius:2px}.range::-moz-range-track{height:3px;background:var(--line);border-radius:2px}.range::-webkit-slider-thumb{-webkit-appearance:none;width:1.25rem;height:1.25rem;margin-top:calc((3px - 1.25rem)/2);border-radius:50%;background:var(--sheet);border:2px solid var(--ink);box-shadow:0 1px 2px #1b24372e}.range::-moz-range-thumb{width:1.125rem;height:1.125rem;border-radius:50%;background:var(--sheet);border:2px solid var(--ink)}.range:disabled{opacity:.4}.seg{display:inline-flex;border:1px solid var(--line);border-radius:var(--r0);background:var(--sheet);padding:3px;gap:2px;max-width:100%}.seg>button{border:0;background:transparent;color:var(--ink-2);height:1.875rem;padding:0 12px;border-radius:4px;font-weight:500;font-size:var(--t-1);white-space:nowrap;min-width:0;overflow:hidden;text-overflow:ellipsis}.seg>button:hover{color:var(--ink);background:var(--line-2)}.seg>button.is-on{background:var(--ink);color:#fff}.seg.seg-fill{display:flex}.seg.seg-fill>button{flex:1 1 auto}.check{display:inline-flex;align-items:center;gap:10px;font-size:var(--t0);cursor:pointer}.check input{width:18px;height:18px;accent-color:var(--ink);margin:0}.swatches{display:flex;flex-wrap:wrap;gap:8px}.swatch{width:26px;height:26px;border-radius:50%;border:2px solid var(--sheet);box-shadow:0 0 0 1px var(--line);cursor:pointer;padding:0}.swatch.is-on{box-shadow:0 0 0 2px var(--ink)}.chip{display:inline-flex;align-items:center;gap:6px;min-height:1.5rem;padding:0 8px;border-radius:var(--r-1);font-size:var(--t-1);font-weight:500;background:var(--line-2);color:var(--ink-2)}.chip.ok{background:var(--green-soft);color:var(--green-text)}.chip.warn{background:var(--amber-soft);color:var(--amber-text)}.chip.hot{background:var(--vermilion-soft);color:var(--vermilion-deep)}.chip.info{background:var(--blue-soft);color:var(--blue-text)}.home{padding-bottom:80px}.hero{position:relative;border-bottom:1px solid var(--line);background:var(--sheet);min-height:clamp(220px,32vh,340px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);padding-inline:max(0px,calc((100% - 67.5rem)/2))}.hero-copy{padding:clamp(24px,4vw,48px) var(--gutter);display:flex;flex-direction:column;justify-content:center;gap:14px}.hero h1{font-size:clamp(1.9rem,4.2vw,3.2rem);font-weight:700;letter-spacing:-.035em;line-height:1.02;font-variation-settings:"opsz" 96;max-width:12ch}.hero p{color:var(--ink-2);max-width:44ch;font-size:var(--t1)}.hero-canvas{position:relative;min-height:200px}.hero-canvas canvas{position:absolute;inset:0;width:100%;height:100%}.hero-note{position:absolute;right:var(--gutter);bottom:12px;font-size:var(--t-1);color:var(--ink-3)}.home-main{padding:26px var(--gutter) 0;max-width:67.5rem;width:100%;margin-inline:auto}.stepper{list-style:none;margin:0 0 26px -6px;padding:0;display:flex;flex-wrap:wrap;gap:6px 0;align-items:center}.stepper .stp{display:flex;align-items:center;color:var(--ink-3);font-size:var(--t-1)}.stepper .stp>a,.stepper .stp>span{display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:inherit;padding:6px 10px 6px 6px;border-radius:var(--r0)}.stepper .stp>a:hover{background:var(--sheet);color:var(--ink)}.stepper .n{width:1.375rem;height:1.375rem;border-radius:50%;border:1.5px solid currentColor;display:inline-flex;align-items:center;justify-content:center;font-weight:600;font-size:var(--t-2)}.stepper .n svg{width:12px;height:12px}.stepper .stp.is-active{color:var(--ink);font-weight:600}.stepper .stp.is-active .n{background:var(--ink);color:#fff;border-color:var(--ink)}.stepper .stp.is-done{color:var(--ink-2)}.stepper .stp.is-done .n{background:var(--green-soft);color:var(--green-text);border-color:var(--green)}.stepper .val{color:var(--ink);font-weight:600}.stepper .chg{font-size:var(--t-2);color:var(--blue-text);text-decoration:underline;text-underline-offset:2px;margin-left:2px}.stepper .stp:not(:last-child):after{content:"";width:28px;height:1px;background:var(--line);margin:0 6px}.step-body h1,.step-body h2{font-size:var(--t3);font-weight:600;letter-spacing:-.02em;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}.step-body h1 small,.step-body h2 small{font-weight:400;color:var(--ink-2);font-size:var(--t0)}.step-body .lead{color:var(--ink-2);margin-top:6px}.step-actions{margin-top:22px;display:flex;gap:10px}.step-actions .btn[aria-disabled=true]{opacity:.4;pointer-events:none}.class-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:20px;max-width:40rem}.class-tile{aspect-ratio:1 / 1.05;border-radius:var(--r1);border:1px solid var(--line);background:var(--sheet);background-image:linear-gradient(var(--grid-minor) 1px,transparent 1px),linear-gradient(90deg,var(--grid-minor) 1px,transparent 1px);background-size:13px 13px;background-position:-1px -1px;display:flex;flex-direction:column;justify-content:flex-end;align-items:flex-start;padding:12px 14px;color:var(--ink);text-align:left;position:relative;overflow:hidden;transition:transform .12s var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}.class-tile .cls-word{font-size:var(--t-1);color:var(--ink-2);font-weight:500}.class-tile b{font-size:clamp(2.4rem,6vw,3.6rem);font-weight:700;letter-spacing:-.04em;line-height:1;font-variation-settings:"opsz" 96}.class-tile:hover{border-color:var(--ink-3);transform:translateY(-2px)}.class-tile.is-on{background:var(--ink);background-image:none;border-color:var(--ink);color:#fff;box-shadow:0 8px 22px #1b243738}.class-tile.is-on .cls-word{color:#ffffffb3}.class-tile.is-on:after{content:"";position:absolute;top:10px;right:10px;width:10px;height:10px;border-radius:50%;background:var(--vermilion)}.subject-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin-top:20px;max-width:47.5rem}.subject-sheet{display:grid;grid-template-columns:84px 1fr 28px;gap:16px;align-items:center;padding:18px;border:1px solid var(--line);border-radius:var(--r1);background:var(--sheet);text-align:left;color:var(--ink);min-height:112px;text-decoration:none;transition:border-color var(--dur) var(--ease),transform .12s var(--ease),box-shadow var(--dur) var(--ease)}.subject-sheet:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:0 8px 22px #1b24371a}.subject-sheet svg{width:84px;height:84px}.subject-sheet h2{font-size:var(--t2);font-weight:600}.subject-sheet p{color:var(--ink-2);font-size:var(--t-1);margin-top:4px}.subject-sheet .go{color:var(--ink-3)}.subject-sheet .go svg{width:18px;height:18px}.toc{border-top:1px solid var(--line);margin-top:16px}.toc-row{display:grid;grid-template-columns:44px 56px minmax(0,1fr) auto;align-items:center;gap:14px;padding:14px 6px;border-bottom:1px solid var(--line-2);text-decoration:none;color:var(--ink);transition:background var(--dur) var(--ease)}a.toc-row:hover{background:var(--sheet)}.toc-row .idx{font-family:var(--mono);color:var(--ink-3);font-size:var(--t-1)}.toc-row .ico{width:56px;height:44px;color:var(--ink)}.toc-row .ico svg{width:56px;height:44px}.toc-row h2{font-size:var(--t1);font-weight:600}.toc-row p{color:var(--ink-2);font-size:var(--t-1);margin-top:2px}.toc-row p.chap,.toc-row.is-soon{color:var(--ink-3)}.toc-row.is-soon h2{color:var(--ink-2);font-weight:500}.toc-row.is-soon .ico{color:var(--ink-3)}.toc-row .action{display:flex;align-items:center;gap:10px}.toc-empty{padding:40px 0;color:var(--ink-2)}@media(max-width:820px){.hero{grid-template-columns:1fr;min-height:0}.hero-copy{padding-block:22px 16px}.hero-canvas{min-height:0;border-top:1px solid var(--line-2)}.hero-canvas canvas{position:static;height:190px}.hero-note{position:static;display:block;padding:0 var(--gutter) 12px}.top .crumbs.tagline{display:none}.home-main{padding-top:18px}.stepper{margin-bottom:18px}.stepper .nm{display:none}.stepper .stp.is-active .nm{display:inline}.stepper .stp:not(:last-child):after{width:14px;margin:0 2px}.class-row{gap:10px}.class-tile{padding:8px 10px}.toc-row{grid-template-columns:30px 44px minmax(0,1fr);padding:12px 2px}.toc-row .ico,.toc-row .ico svg{width:44px;height:36px}.toc-row .action{grid-column:3;justify-content:flex-start;margin-top:8px}.toc-row .action .status-text{display:none}.top{padding-inline:16px}}@media(max-width:480px){.class-row{grid-template-columns:repeat(2,minmax(0,1fr))}.step-actions .btn{width:100%}}.check .tick{flex:none;width:15px;height:15px;border:1.5px solid var(--ink-3);border-radius:3px;background:var(--sheet)}.check .tick.is-on{background:var(--green);border-color:var(--green);box-shadow:inset 0 0 0 2px var(--sheet)}.boot-fail{margin:18vh auto 0;width:min(26rem,calc(100% - 32px));padding:22px 24px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;background:var(--sheet);border:1px solid var(--line);border-radius:var(--r1);box-shadow:0 8px 24px #1b24371a}.boot-fail h1{font-size:var(--t2)}.boot-fail p{color:var(--ink-2)}.boot-fail .btn{margin-top:4px}:root[data-lang=hi] body *{letter-spacing:normal!important}@media(min-width:1600px){:root{font-size:clamp(16px,calc(1vw / var(--zf, 1)),40px)}.top{height:5.5rem;padding-inline:calc(6vw / var(--zf, 1))}.home-main,.hero,.step-body,.choice-panel{width:calc(88vw / var(--zf, 1));max-width:calc(88vw / var(--zf, 1))}.hero-copy p,.toc-copy p,.journey p{font-size:1rem;max-width:none}.toc{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem}.catalog-search input{max-width:none;height:3.5rem;font-size:1.1rem}.iit-mandi-logo,.institute-lockup .iit-mandi-logo{display:block!important;height:2.25rem;max-height:2.25rem}.iit-mandi-name,.lab-institute{font-size:1.05rem}}@media(min-width:1200px)and (max-width:1599px){.iit-mandi-logo,.institute-lockup .iit-mandi-logo{display:block!important;height:38px;max-height:38px}}