/*
Theme Name: IISER Science Guide
Description: The approved IISER.in science admissions and IAT question guide by Mathiit.
Version: 1.0.0
Author: Mathiit
Requires at least: 6.4
Requires PHP: 7.4
Text Domain: iiser-science-guide
*/
:root{--navy:#101f3d;--blue:#2456d8;--blue-dark:#193c9a;--ink:#1a2941;--muted:#53627a;--line:#dae2ed;--light:#f3f6fb;--teal:#087b78;--gold:#d6a344;--radius:16px;--width:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:120px}body{margin:0;background:#fff;color:var(--ink);font-family:Inter,Arial,Helvetica,sans-serif;font-size:16px;line-height:1.65}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}button,select{font:inherit}a,button,summary,select{touch-action:manipulation}button,summary{cursor:pointer}:focus-visible{outline:3px solid #c39329;outline-offset:4px}h1,h2,h3,h4,p{margin-top:0}h1,h2,h3{color:var(--navy);line-height:1.15;letter-spacing:-.035em}h1{font-size:clamp(2.55rem,4.25vw,4.4rem);font-weight:750;margin-bottom:24px}h2{font-size:clamp(1.85rem,3vw,2.6rem);font-weight:720;margin-bottom:20px}h3{font-size:1.3rem;letter-spacing:-.02em;margin-bottom:12px}p{margin-bottom:20px}ul,ol{padding-left:22px}li{margin-bottom:10px}small,.small{font-size:.875rem}.container{width:min(var(--width),calc(100% - 48px));margin:auto}.skip{position:absolute;left:20px;top:-100px;z-index:100;background:#fff;padding:12px}.skip:focus{top:12px}.review-bar{background:#e8edf5;border-bottom:1px solid #d2dceb;font-size:.875rem;color:#283c59}.review-inner{display:flex;justify-content:space-between;align-items:center;gap:18px;min-height:44px}.review-bar strong{font-size:.75rem;letter-spacing:.1em;margin-right:10px}.review-bar select{background:#fff;border:1px solid #bccbdf;border-radius:5px;padding:4px 30px 4px 10px;max-width:220px;font-size:.875rem}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:26px;min-height:92px}.brand{display:flex;align-items:center;gap:12px;color:var(--navy);flex-shrink:0}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;background:var(--navy);color:#fff;border-radius:11px;width:47px;height:47px;font-size:1.4rem;font-weight:800;letter-spacing:-.1em}.brand-name{display:block;font-size:1.7rem;line-height:1.1;font-weight:800;letter-spacing:-.035em}.brand-sub{display:block;font-size:.75rem;letter-spacing:.13em;line-height:1.9;font-weight:700;color:var(--muted)}.main-nav{display:flex;align-items:center;gap:24px;font-size:.875rem;font-weight:650}.main-nav>a,.nav-group>summary{color:var(--ink)}.main-nav [aria-current=page]{color:var(--blue)}.nav-group{position:relative}.nav-group>summary{list-style:none;white-space:nowrap}.nav-group>summary::-webkit-details-marker{display:none}.nav-group>summary:after{content:'⌄';margin-left:5px}.nav-group[open]>summary{color:var(--blue)}.nav-dropdown{position:absolute;top:35px;left:-18px;min-width:230px;display:grid;gap:3px;background:#fff;padding:14px;border:1px solid var(--line);border-radius:10px;box-shadow:0 18px 38px #1123451a}.nav-dropdown a{padding:8px 10px;color:var(--ink);border-radius:5px}.nav-dropdown a:hover{background:var(--light);text-decoration:none}.nav-button{background:var(--blue);color:#fff!important;padding:11px 17px;border-radius:6px;white-space:nowrap}.menu-toggle{display:none;background:white;border:1px solid var(--line);border-radius:6px;padding:8px 14px}.eyebrow{text-transform:uppercase;letter-spacing:.15em;color:var(--blue);font-weight:750;font-size:.75rem;display:flex;align-items:center;gap:12px;margin-bottom:22px}.eyebrow:before{content:'';width:26px;height:3px;background:var(--gold);flex-shrink:0}.hero{background:linear-gradient(115deg,#f6f9fe,#edf3fd);padding:72px 0 64px;border-bottom:1px solid var(--line)}.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:70px;align-items:center}.hero p{font-size:1.14rem;color:var(--muted);max-width:610px}.hero h1 span{color:var(--blue)}.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:28px 0 18px}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;min-height:48px;border-radius:6px;background:var(--blue);color:#fff;padding:12px 21px;font-size:.9375rem;font-weight:700;border:1px solid var(--blue)}.button:hover{background:var(--blue-dark);text-decoration:none}.button.secondary{background:#fff;color:var(--ink);border-color:#bccce2}.button.secondary:hover{background:#eaf0fa}.button:after{content:'↗';font-size:1.15rem}.hero-note{font-size:.8125rem!important;line-height:1.65}.exam-card{border:1px solid #c7d5e9;border-radius:var(--radius);background:#fff;box-shadow:0 16px 40px #1b3d7b0c;overflow:hidden}.exam-card-top{background:var(--navy);padding:25px 28px;color:#fff;display:flex;justify-content:space-between;gap:16px;align-items:center}.exam-card-top h2{color:#fff;font-size:1.75rem;margin:3px 0}.exam-card-top .small{color:#becee6}.exam-year{border:1px solid #586783;border-radius:5px;padding:3px 9px;font-size:.75rem}.subject-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));padding:24px;gap:12px}.subject-tile{border:1px solid var(--line);border-radius:9px;padding:17px 16px;display:flex;gap:13px;align-items:center}.subject-code{color:var(--blue);font-weight:750;font-size:1.2rem;width:42px;height:42px;display:grid;place-items:center;background:#ebf1fd;border-radius:8px}.subject-tile:nth-child(2) .subject-code{background:#e6f3f0;color:var(--teal)}.subject-tile:nth-child(3) .subject-code{background:#faf0d9;color:#86651c}.subject-tile:nth-child(4) .subject-code{background:#eeeafd;color:#6550a3}.subject-tile strong{font-size:.9rem}.subject-tile small{display:block;font-size:.75rem;color:var(--muted)}.score-strip{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);padding:20px 12px;text-align:center}.score-strip>div+div{border-left:1px solid var(--line)}.score-strip strong{display:block;font-size:1.45rem;color:var(--navy)}.score-strip span{font-size:.75rem;color:var(--muted)}.notice{display:flex;gap:22px;padding:22px 0;align-items:center;border-bottom:1px solid var(--line);font-size:.9375rem}.notice-label{color:var(--blue);background:#edf2fd;font-size:.75rem;letter-spacing:.08em;padding:5px 10px;white-space:nowrap;font-weight:700}.notice p{margin:0}.section{padding:72px 0}.section.tinted{background:var(--light)}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:48px;margin-bottom:30px}.section-head h2{max-width:700px;margin-bottom:12px}.section-head p{color:var(--muted);max-width:610px;margin:0}.text-link{font-size:.9375rem;font-weight:700;white-space:nowrap}.text-link:after{content:' →';margin-left:5px}.grid{display:grid;gap:22px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.card{border:1px solid var(--line);border-radius:12px;background:#fff;padding:28px}.card p{color:var(--muted);font-size:.9375rem;margin-bottom:16px}.card p:last-child{margin-bottom:0}.card-number{font-size:.8125rem;color:var(--blue);font-weight:700;letter-spacing:.08em;display:block;margin-bottom:26px}.card>a:last-child{font-size:.875rem;font-weight:700}.card h3 a{color:var(--navy)}.card.accent{border-top:3px solid var(--blue)}.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}.body-copy{max-width:760px}.body-copy p{color:var(--muted)}.steps{counter-reset:journey}.step{display:flex;gap:20px;align-items:flex-start;padding-bottom:26px;position:relative}.step:before{counter-increment:journey;content:counter(journey,decimal-leading-zero);background:#eaf0fc;color:var(--blue);font-size:.875rem;font-weight:700;min-width:42px;height:42px;border-radius:50%;display:grid;place-items:center}.step:not(:last-child):after{content:'';position:absolute;top:43px;bottom:2px;left:21px;border-left:1px solid #d2dced}.step h3{font-size:1.13rem;margin-bottom:8px}.step p{color:var(--muted);font-size:.9375rem;margin:0}.cta-band{background:var(--navy);border-radius:16px;padding:40px 44px;color:#d0dbec;display:flex;justify-content:space-between;gap:45px;align-items:center}.cta-band h2{color:#fff;font-size:2rem;margin-bottom:12px}.cta-band p{margin:0;max-width:680px}.cta-band .button{background:#fff;color:var(--navy);border-color:#fff;flex-shrink:0}.site-footer{padding:56px 0 22px;background:#0d1b33;color:#aebed5}.site-footer h3{color:#fff;font-size:.9375rem;letter-spacing:0}.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;gap:48px}.site-footer a{color:#c3d0e4;font-size:.875rem}.footer-list{list-style:none;padding:0}.footer-list li{margin-bottom:9px}.site-footer .brand-name{color:#fff;margin-bottom:14px}.site-footer p{font-size:.875rem}.footer-bottom{display:flex;justify-content:space-between;gap:24px;border-top:1px solid #2a3850;padding-top:20px;margin-top:32px;font-size:.75rem}.page-hero{background:var(--light);border-bottom:1px solid var(--line);padding:28px 0 48px}.breadcrumb{font-size:.8125rem;color:var(--muted);margin-bottom:32px}.breadcrumb span{margin:0 10px}.page-hero h1{font-size:clamp(2.2rem,3.6vw,3.4rem);max-width:890px;margin-bottom:18px}.page-hero .intro{color:var(--muted);font-size:1.1rem;max-width:800px;margin-bottom:22px}.metadata{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:.8125rem;color:var(--muted)}.metadata strong{color:var(--teal);font-weight:650}.content-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;padding-top:46px;padding-bottom:70px}.side-nav{align-self:start;position:sticky;top:124px;font-size:.875rem;border:1px solid var(--line);border-radius:10px;overflow:hidden}.side-nav h2{font-size:.75rem;letter-spacing:.09em;margin:0;background:var(--light);padding:17px 18px;border-bottom:1px solid var(--line)}.side-nav a{display:block;color:var(--muted);padding:10px 18px;border-left:3px solid transparent}.side-nav a[aria-current=page]{border-left-color:var(--blue);background:#edf2fd;color:var(--blue);font-weight:700}.side-nav a:hover{background:var(--light);text-decoration:none}.article-section{margin-bottom:48px}.article-section>h2{font-size:1.9rem;margin-bottom:20px}.article-section>p,.article-section>ul,.article-section>ol{color:var(--muted)}.article-section:last-child{margin-bottom:0}.callout{padding:22px 25px;background:#edf3fd;border-left:3px solid var(--blue);border-radius:0 9px 9px 0;margin:24px 0}.callout p{margin:0;font-size:.9375rem;color:#3f526e}.callout strong{color:var(--navy)}.callout.amber{background:#fff8e9;border-color:var(--gold)}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;margin:24px 0}table{border-collapse:collapse;width:100%;font-size:.9375rem;text-align:left}th{background:#edf2f9;color:var(--navy);font-size:.8125rem;letter-spacing:.01em}td,th{padding:15px 18px;border-bottom:1px solid var(--line);vertical-align:top}tr:last-child td{border-bottom:0}td{color:var(--muted)}td:first-child{font-weight:650;color:var(--ink)}.table-wrap caption{background:#fff;padding:12px 18px;text-align:left;font-size:.8125rem;color:var(--muted);caption-side:bottom}.pill{display:inline-block;background:#edf2fd;color:var(--blue);border-radius:5px;font-size:.75rem;padding:3px 8px;line-height:1.65;font-weight:650}.pill.teal{background:#e7f3f0;color:#086b68}.sources{border-top:1px solid var(--line);padding-top:25px;margin-top:42px}.sources h2{font-size:1rem;letter-spacing:0}.sources ol{font-size:.8125rem;color:var(--muted);margin-bottom:10px}.sources p{font-size:.8125rem;color:var(--muted)}.page-next{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:25px;background:var(--light);border-radius:10px;margin-top:36px}.page-next span{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);display:block}.page-next a{font-size:1.1rem;font-weight:700}.faq-list details{border:1px solid var(--line);border-radius:9px;background:#fff;margin-bottom:12px}.faq-list summary{padding:19px 23px;font-weight:650;color:var(--navy)}.faq-list details>div{padding:0 23px 20px;color:var(--muted);font-size:.9375rem}.faq-list details>div p:last-child{margin:0}.campus-tag{font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--blue);margin-bottom:12px;display:block}.download-row{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}.download-row h3{font-size:1.15rem;margin-bottom:6px}.download-row p{font-size:.875rem;color:var(--muted);margin:0}.download-links{display:flex;gap:8px;flex-wrap:wrap}.download-links a{padding:8px 12px;border:1px solid #cbd8eb;border-radius:5px;font-size:.8125rem;font-weight:650}.wide-card{padding:30px;background:var(--navy);border-radius:12px;color:#c8d5e9}.wide-card h3{color:#fff}.wide-card p{color:#c8d5e9}.wide-card a{color:#fff}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin:26px 0}.stat{border:1px solid var(--line);padding:20px;border-radius:9px}.stat strong{display:block;color:var(--blue);font-size:1.9rem;line-height:1.3}.stat span{font-size:.8125rem;color:var(--muted)}.contents-index{column-count:2;column-gap:30px}.contents-index a{display:block;padding:12px 0;border-bottom:1px solid var(--line);break-inside:avoid}.editorial-note{font-size:.875rem;color:var(--muted);padding:15px 0}.contact-method{font-size:1.1rem;overflow-wrap:anywhere}
@media(max-width:1050px){.main-nav{gap:15px}.brand-sub{font-size:.75rem}.hero-grid{gap:35px}.hero h1{font-size:3.3rem}.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{gap:28px}.main-nav{font-size:.875rem}.header-inner{gap:15px}.content-layout{grid-template-columns:200px minmax(0,1fr);gap:30px}}
@media(max-width:850px){.menu-toggle{display:block}.header-inner{min-height:78px;flex-wrap:wrap;padding:15px 0}.main-nav{display:none;width:100%;align-items:stretch;padding:15px 0;flex-direction:column;gap:16px}.main-nav.is-open{display:flex}.nav-dropdown{position:static;margin-top:12px;box-shadow:none}.nav-button{text-align:center}.hero-grid{grid-template-columns:1fr;gap:35px}.hero{padding:48px 0}.hero h1{font-size:3.4rem;max-width:660px}.hero p{max-width:650px}.exam-card{max-width:600px}.content-layout{grid-template-columns:1fr}.side-nav{position:static;display:none}.grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}.split{gap:35px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.cta-band{align-items:flex-start;flex-direction:column;gap:24px}.notice{align-items:flex-start}.section-head{align-items:flex-start;gap:20px;flex-direction:column}}
@media(max-width:560px){.container{width:calc(100% - 32px)}.review-inner{gap:8px;min-height:52px}.review-inner>span{max-width:145px;font-size:.75rem;line-height:1.3}.review-bar strong{display:block;font-size:.75rem}.review-bar select{max-width:175px;font-size:.8125rem}.hero h1{font-size:2.65rem}.hero p{font-size:1rem}.subject-grid{padding:15px;gap:9px}.subject-tile{padding:12px 10px;gap:8px}.subject-code{width:30px;height:34px;font-size:1rem;flex-shrink:0}.subject-tile strong{font-size:.8125rem}.subject-tile small{font-size:.75rem}.exam-card-top{padding:21px}.section{padding:48px 0}.grid.two,.grid.three,.grid.four,.split{grid-template-columns:1fr}.notice{flex-direction:column;gap:10px}.card{padding:24px}.card-number{margin-bottom:18px}.cta-band{padding:28px}.footer-grid{grid-template-columns:1fr;gap:20px}.footer-bottom{flex-direction:column;gap:10px}.page-hero{padding-bottom:33px}.content-layout{padding-top:32px;gap:24px}.stats-row{grid-template-columns:repeat(2,1fr)}.download-row{align-items:flex-start;flex-direction:column}.contents-index{column-count:1}.actions .button{width:100%}.page-next{align-items:flex-start;flex-direction:column}.review-bar select{min-height:34px}th,td{padding:13px}.table-wrap{font-size:.875rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.review-bar,.main-nav,.menu-toggle,.side-nav,.site-footer,.page-next{display:none}.site-header{position:static}.content-layout{display:block}.container{width:100%}.hero,.page-hero,.section{padding:25px 0}.card,.exam-card,.table-wrap,.faq-list details{break-inside:avoid}.faq-list details>div{display:block}.hero-grid{grid-template-columns:1fr 1fr}a{color:inherit}.button{border:1px solid #999;background:white;color:black}}

.footer-references{border-top:1px solid #2a3850;padding-top:20px;margin-top:25px;font-size:.75rem;line-height:1.7}.footer-references p,.footer-references a,.footer-references summary{font-size:.75rem}.footer-references p{margin-bottom:10px}.footer-references ul{margin:10px 0}.footer-bottom{margin-top:20px}
/* Complete PYQ and syllabus pages. */
.content-layout article{min-width:0}.chapter-toc,.paper-nav{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 30px}.chapter-toc a,.paper-nav a{border:1px solid var(--line);border-radius:6px;padding:9px 13px;background:var(--light);font-size:.87rem}.chapter-toc{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.syllabus-chapter h2{font-size:1.65rem}.study-tools{display:flex;align-items:end;justify-content:space-between;flex-wrap:wrap;gap:15px;background:var(--light);border:1px solid var(--line);padding:20px;border-radius:10px;margin-bottom:15px}.study-tools label{font-size:.87rem;font-weight:650;flex:1;min-width:210px}.study-tools input{display:block;width:100%;font:inherit;font-weight:400;padding:11px 13px;border:1px solid #aebed4;border-radius:5px;margin-top:6px;background:#fff}.small-button{font:inherit;background:var(--navy);color:#fff;border:0;border-radius:5px;padding:12px 16px}.key-table{border:1px solid var(--line);border-radius:8px;padding:17px;margin:25px 0 45px}.key-table summary{font-weight:700;color:var(--navy)}.key-table table{margin-top:20px}.key-table td a{white-space:nowrap;display:inline-block}.paper-section>h2{font-size:2rem;border-bottom:3px solid var(--blue);padding-bottom:15px;margin:45px 0 25px}.question-card{border:1px solid #d4deec;border-radius:12px;margin:0 0 24px;padding:25px;background:#fff;scroll-margin-top:125px}.question-card[hidden]{display:none}.question-heading{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;border-bottom:1px solid #e4eaf3;margin-bottom:20px;padding-bottom:12px}.question-heading h3{font-size:1.12rem;margin:0}.question-heading>span{font-size:.75rem;letter-spacing:.04em;color:var(--muted)}.question-stem{font-size:1.025rem;line-height:1.85}.question-stem img,.question-options img{display:block;max-width:100%;height:auto;max-height:440px;object-fit:contain;margin:20px auto}.question-options{padding-left:28px;margin:22px 0}.question-options>li{padding:11px 12px 11px 8px;border-bottom:1px solid #edf1f7}.question-options>li::marker{font-weight:750;color:var(--blue)}.question-options p{margin-bottom:5px}.worked-answer{background:#f1f5fc;border:1px solid #dce5f3;border-radius:8px}.worked-answer summary{font-size:.9rem;font-weight:700;color:var(--blue-dark);padding:14px 17px}.solution-content{padding:3px 20px 22px}.answer-label{display:block;margin:8px 0 14px;color:var(--teal)}.solution-text{line-height:1.95}.answer-qualification{background:#fff6df;color:#644a14;border-left:3px solid var(--gold);font-size:.87rem;padding:12px 14px}.transcription-note{font-size:.78rem;color:#53647e;line-height:1.6;border-left:2px solid #b7c5da;padding:6px 12px;margin:15px 0}.question-card math{font-size:1.07em}.question-card math[display=block]{overflow-x:auto;overflow-y:hidden;max-width:100%;padding:10px 0;margin:12px 0;display:block;text-align:center}.question-stem table{font-size:.88rem}.question-stem{overflow-x:auto}.dna{font-family:monospace;line-height:1.6}.admissions-contact{font-size:12px;color:#acbad0;border-top:1px solid #35435d;padding-top:18px}.admissions-contact a{color:#cad7ec}.footer-references{font-size:12px!important;line-height:1.65}.footer-references p{font-size:12px}.footer-references ul{padding-left:20px}.footer-references li{margin-bottom:5px}
@media(max-width:700px){.chapter-toc{grid-template-columns:1fr}.question-card{padding:18px 14px}.solution-content{padding:0 13px 18px}.question-heading>span{font-size:.68rem}.question-stem,.solution-text{font-size:.95rem}.question-options{padding-left:24px}.study-tools{padding:15px}.question-stem table th,.question-stem table td{padding:9px}.key-table{padding:12px}.paper-nav a{font-size:.8rem;padding:8px}.question-card math{font-size:1em}}
@media print{.site-header,.review-bar,.side-nav,.site-footer,.study-tools,.page-next,.chapter-toc{display:none!important}.content-layout{display:block}.question-card{break-inside:avoid;border:1px solid #bbb;box-shadow:none}.container{width:100%}.page-hero{padding:20px 0}.worked-answer{background:white}a{color:inherit}.question-card img{max-height:300px}}

/* Production layout: preview controls are removed. */
.site-header{top:0}body.admin-bar .site-header{top:32px}@media(max-width:782px){body.admin-bar .site-header{top:46px}}