:root{
 --navy:#173b8f;--blue:#1d5bd7;--red:#ef4b3f;--yellow:#ffd83d;
 --green:#45a85a;--purple:#8b5cf6;--orange:#f59e0b;--pink:#ec4899;
 --ink:#24365b;--muted:#667085;--line:#e5eaf3;--bg:#fff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:#fff;line-height:1.55}
a{text-decoration:none;color:inherit}
.top-strip{background:var(--navy);color:#fff;padding:9px 5%;font-size:13px;display:flex;justify-content:space-between;gap:15px}
.header{background:#fff;border-bottom:1px solid #edf0f6;position:sticky;top:0;z-index:50}
.navbar{max-width:1180px;margin:auto;min-height:76px;padding:0 5%;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px;color:var(--navy);white-space:nowrap}
.logo-cap{font-size:31px}.logo-name{font-weight:900;font-size:19px;letter-spacing:.2px}.logo-name small{display:block;font-size:9px;color:var(--red);letter-spacing:1.4px}
.nav{display:flex;align-items:center;gap:4px}.nav a{font-size:13px;font-weight:800;padding:10px 13px;border-radius:22px;color:#24365b}.nav a:hover,.nav a.active{background:#edf4ff;color:var(--blue)}
.menu{display:none;border:0;background:var(--navy);color:#fff;border-radius:9px;padding:8px 11px;font-size:20px}
.hero{background:linear-gradient(110deg,#eef7ff 0%,#fffdf2 100%);position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:#fff3b5;right:-100px;top:-120px;opacity:.75}
.hero:after{content:"";position:absolute;width:180px;height:180px;border-radius:45%;background:#dcecff;left:-80px;bottom:-100px;opacity:.7;transform:rotate(18deg)}
.home-hero{min-height:390px;padding:58px 5% 52px}
.hero-inner{max-width:1180px;margin:auto;position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:45px;align-items:center}
.kicker{display:inline-block;background:#fff;border:1px solid #e4eaf5;border-radius:22px;padding:8px 14px;font-size:12px;font-weight:900;color:var(--blue);box-shadow:0 6px 20px #173b8f10}
h1{margin:15px 0 8px;color:var(--navy);font-size:48px;line-height:1.08;letter-spacing:-1px}
h1 .red{color:var(--red)}
.lead{font-size:16px;color:#536887;max-width:650px}
.yellow-line{height:5px;width:90px;border-radius:10px;background:var(--yellow);margin:18px 0}
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:23px 0}
.feature{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 9px;text-align:center;box-shadow:0 5px 16px #173b8f0b;font-size:11px;font-weight:800}
.feature .fi{font-size:23px;display:block;margin-bottom:4px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-block;padding:12px 18px;border-radius:10px;font-weight:900;font-size:13px}
.btn-primary{background:var(--navy);color:#fff}.btn-outline{background:#fff;border:1px solid #d9e1ef;color:var(--navy)}
.hero-art{min-height:285px;position:relative;display:grid;place-items:center}
.teacher-card{width:min(420px,100%);min-height:255px;background:#fff;border:7px solid var(--yellow);border-radius:26px;box-shadow:0 14px 35px #173b8f14;display:grid;place-items:center;text-align:center;padding:30px;position:relative}
.teacher-card:before{content:"";position:absolute;width:100px;height:100px;border-radius:50%;background:#dff5e4;left:30px;top:20px}
.teacher-card:after{content:"";position:absolute;width:85px;height:85px;border-radius:35%;background:#e8ddff;right:30px;bottom:20px;transform:rotate(18deg)}
.teacher-card>*{position:relative;z-index:2}.teacher-icon{font-size:54px}.teacher-title{font-size:29px;font-weight:900;color:var(--blue);border:2px solid #c9d7ef;border-radius:35%;padding:5px 17px}.teacher-sub{font-weight:900;color:var(--red);font-size:14px;margin-top:8px}
.quote{position:absolute;right:-10px;bottom:5px;background:#fff;border:1px solid #e4eaf5;border-radius:15px;padding:12px 16px;font-size:11px;font-weight:800;box-shadow:0 10px 25px #173b8f10;display:none}
.section{max-width:1180px;margin:auto;padding:42px 5%}
.section-title{text-align:center;margin-bottom:25px}
.section-title h2{margin:0;color:var(--navy);font-size:28px}
.section-title p{margin:4px 0;color:#71809a;font-size:14px}
.section-title .spark{color:var(--yellow);font-size:16px}
.class-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.class-card{position:relative;min-height:145px;border-radius:17px;padding:18px 14px;background:#f5f1ff;border:1px solid #e5ddff;box-shadow:0 8px 22px #173b8f09;transition:.18s}
.class-card:nth-child(2){background:#eef9ee;border-color:#d9eedb}
.class-card:nth-child(3){background:#fff3e5;border-color:#ffe0bd}
.class-card:nth-child(4){background:#edf6ff;border-color:#d9eaff}
.class-card:nth-child(5){background:#fff0f8;border-color:#f8d8e9}
.class-card:nth-child(6){background:#fff9df;border-color:#f6e8a8}
.class-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px #173b8f16}
.class-icon{font-size:31px}.popular{position:absolute;right:8px;top:8px;background:var(--red);color:#fff;font-size:9px;padding:4px 6px;border-radius:10px;font-weight:900}
.class-card h3{margin:8px 0 2px;color:var(--navy);font-size:16px}.class-card p{margin:0;color:#73819b;font-size:11px}.explore{display:inline-block;margin-top:9px;color:var(--blue);font-size:11px;font-weight:900}
.study-row{display:grid;grid-template-columns:1fr 1.6fr;gap:25px;align-items:stretch}
.why{background:linear-gradient(145deg,#162f77,#2149a3);border-radius:20px;padding:27px;color:#fff;box-shadow:0 14px 32px #173b8f20}
.why h2{margin:0 0 15px;font-size:24px}.why ul{padding:0;margin:0;list-style:none}.why li{padding:8px 0;font-size:13px}.why li:before{content:"✓";display:inline-grid;place-items:center;width:22px;height:22px;background:#fff2a8;color:#173b8f;border-radius:50%;margin-right:8px;font-weight:900}
.steps{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:8px;align-items:center}
.step{text-align:center}.step-icon{width:52px;height:52px;margin:0 auto 7px;border-radius:50%;display:grid;place-items:center;font-size:25px;background:#e9f8eb}.step:nth-child(3) .step-icon{background:#ffe9f3}.step:nth-child(5) .step-icon{background:#e8f2ff}.step:nth-child(7) .step-icon{background:#eee7ff}
.step h3{font-size:13px;margin:0;color:var(--navy)}.step p{font-size:10px;color:#78859d;margin:4px 0}.arrow{font-size:22px;color:#9aa7bd}
.quick{margin-top:25px;background:#f7f9fd;border-radius:18px;padding:22px;border:1px solid var(--line)}
.quick h3{margin:0 0 13px;color:var(--navy)}.quick-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.quick a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px;text-align:center;font-size:12px;font-weight:900;color:#3e5071}
.quick a:hover{border-color:#c6d7f5;background:#f3f7ff}
.page-hero{padding:45px 5%}.page-hero .hero-inner{text-align:center}.page-hero h1{font-size:38px}
.breadcrumb{max-width:1180px;margin:auto;padding:16px 5%;font-size:12px;color:#71809a}.breadcrumb a{color:var(--blue);font-weight:800}
.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.subject-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:20px;box-shadow:0 8px 22px #173b8f09;transition:.18s}
.subject-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #173b8f16}
.subject-icon{font-size:34px}.subject-card h3{margin:8px 0 3px;color:var(--navy);font-size:18px}.subject-card p{margin:0;color:#71809a;font-size:12px}.go{display:inline-block;margin-top:11px;color:var(--blue);font-weight:900;font-size:12px}
.chapter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.chapter-card{display:flex;align-items:center;gap:13px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:14px;box-shadow:0 6px 18px #173b8f08;transition:.18s}
.chapter-card:hover{transform:translateY(-3px);border-color:#c7d7f8;box-shadow:0 12px 25px #173b8f12}
.chapter-no{width:42px;height:42px;flex:0 0 42px;border-radius:50%;display:grid;place-items:center;background:#edf4ff;color:var(--blue);font-weight:900}
.chapter-card h3{margin:0;color:var(--navy);font-size:14px}.chapter-card p{margin:2px 0 0;color:#7a879c;font-size:10px}.chapter-link{margin-left:auto;color:var(--blue);font-size:11px;font-weight:900}
.resources{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-top:22px}
.resource{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px;text-align:center;box-shadow:0 7px 20px #173b8f09}.resource .ri{font-size:29px}.resource h3{font-size:14px;margin:7px 0;color:var(--navy)}.resource small{color:#7a879c}
.back-row{margin-top:28px}.back{display:inline-block;border:1px solid #d9e1ef;background:#fff;color:var(--navy);padding:10px 15px;border-radius:10px;font-weight:900;font-size:12px}
.notice{background:#fff9df;border-left:5px solid var(--yellow);padding:13px 15px;border-radius:10px;color:#5b5b40;font-size:12px}
footer{background:var(--navy);color:#fff;padding:28px 5%;display:flex;justify-content:space-between;margin-top:30px}
footer small{opacity:.85}
@media(max-width:1000px){.class-grid{grid-template-columns:repeat(3,1fr)}.study-row{grid-template-columns:1fr}.steps{grid-template-columns:repeat(4,1fr)}.arrow{display:none}.quick-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.top-strip{display:none}.navbar{min-height:65px}.nav{display:none;position:absolute;top:65px;left:0;right:0;background:#fff;padding:8px;box-shadow:0 12px 25px #0002;flex-direction:column}.nav.open{display:flex}.nav a{width:100%;text-align:center}.menu{display:block}.hero-grid{grid-template-columns:1fr}.home-hero{padding:42px 5%}.features{grid-template-columns:repeat(2,1fr)}.class-grid{grid-template-columns:repeat(2,1fr)}.subject-grid,.chapter-grid{grid-template-columns:1fr}.resources{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.quick-grid{grid-template-columns:repeat(2,1fr)}h1{font-size:39px}.page-hero h1{font-size:30px}footer{flex-direction:column;text-align:center;gap:8px}}
@media(max-width:430px){.class-grid{grid-template-columns:1fr}.features,.resources,.quick-grid,.steps{grid-template-columns:1fr}.teacher-card{min-height:220px}.teacher-title{font-size:24px}}

/* ===== Homepage: Choose Class + Bhuibhar Sir layout ===== */
.choose-panel{
  background:rgba(255,255,255,.82);
  padding:10px 14px 17px;
  border-radius:0;
}
.choose-panel .section-title{
  text-align:left;
  margin:0 0 15px 12px;
}
.choose-panel .section-title h2{
  font-size:25px;
}
.choose-panel .section-title p{
  font-size:12px;
}
.choose-panel .spark{
  font-size:14px;
  margin-left:110px;
  margin-bottom:-2px;
}
.choose-panel .class-grid{
  grid-template-columns:repeat(3,1fr);
  gap:9px;
}
.choose-panel .class-card{
  min-height:126px;
  padding:14px 11px;
  border-radius:13px;
}
.choose-panel .class-card .class-icon{
  font-size:25px;
}
.choose-panel .class-card h3{
  font-size:13px;
  margin:6px 0 1px;
}
.choose-panel .class-card p{
  font-size:10px;
}
.choose-panel .class-card .explore{
  font-size:10px;
  margin-top:5px;
}
.choose-panel .popular{
  font-size:7px;
  padding:3px 5px;
}
.home-hero{
  min-height:420px;
  padding:22px 5% 18px;
}
.home-hero .hero-grid{
  grid-template-columns:1.08fr .92fr;
  gap:38px;
  align-items:center;
}
.home-hero .hero-art{
  min-height:330px;
}
.home-hero .teacher-card{
  width:min(410px,100%);
  min-height:195px;
  border-width:5px;
  border-radius:20px;
  padding:24px;
}
.home-hero .teacher-icon{
  font-size:45px;
}
.home-hero .teacher-title{
  font-size:24px;
  padding:4px 14px;
}
.home-hero .teacher-sub{
  font-size:11px;
}
.home-features{
  padding-top:28px;
  padding-bottom:28px;
}
.feature-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:15px;
}
.feature-strip>div{
  display:grid;
  grid-template-columns:48px 1fr;
  grid-template-rows:auto auto;
  column-gap:12px;
  align-items:center;
  padding:10px 8px;
}
.feature-strip span{
  grid-row:1/3;
  width:45px;height:45px;
  display:grid;place-items:center;
  border-radius:50%;
  background:#edf4ff;
  font-size:22px;
}
.feature-strip>div:nth-child(2) span{background:#e8f8ea}
.feature-strip>div:nth-child(3) span{background:#eee8ff}
.feature-strip>div:nth-child(4) span{background:#fff3dc}
.feature-strip b{font-size:14px;color:var(--navy)}
.feature-strip small{font-size:10px;color:#72809a}
@media(max-width:1000px){
  .home-hero .hero-grid{grid-template-columns:1fr}
  .home-hero .hero-art{min-height:230px}
  .feature-strip{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .choose-panel .class-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:430px){
  .choose-panel .class-grid{grid-template-columns:1fr}
  .feature-strip{grid-template-columns:1fr}
}

/* ===== FINAL HOMEPAGE: exact Choose Your Class + Bhuibhar Sir composition ===== */
.exact-home{
  min-height:420px;
  padding:22px 5% 18px;
  background:linear-gradient(105deg,#eef8ff 0%,#fffdf0 100%);
  overflow:hidden;
  position:relative;
}
.exact-home:before{
  content:"";
  position:absolute;
  width:210px;height:210px;
  border-radius:50%;
  right:-75px;top:-105px;
  background:#fff1a9;
  opacity:.78;
}
.exact-home:after{
  content:"";
  position:absolute;
  width:130px;height:130px;
  border-radius:50%;
  left:-62px;bottom:-68px;
  background:#dbeaff;
  opacity:.72;
}
.exact-home-inner{
  width:min(1110px,100%);
  margin:auto;
  display:grid;
  grid-template-columns:1.08fr .92fr;
  gap:36px;
  align-items:center;
  position:relative;
  z-index:2;
}
.choose-box{
  background:rgba(255,255,255,.96);
  padding:10px 14px 17px;
  min-height:365px;
}
.choose-title{
  padding:0 12px 12px;
  text-align:left;
}
.choose-title span{
  display:block;
  color:#ffd83d;
  font-size:15px;
  line-height:12px;
  margin-left:112px;
}
.choose-title h2{
  margin:0;
  color:#173b8f;
  font-size:24px;
  line-height:1.2;
}
.choose-title p{
  margin:6px 0 0;
  color:#4d6488;
  font-size:11px;
}
.six-class-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
}
.class-tile{
  min-height:126px;
  border-radius:13px;
  padding:13px 11px;
  border:1px solid;
  position:relative;
  overflow:hidden;
  transition:.18s;
}
.class-tile:hover{
  transform:translateY(-3px);
  box-shadow:0 10px 22px rgba(23,59,143,.13);
}
.tile-5{background:#f4efff;border-color:#ddd2ff}
.tile-6{background:#eef9ef;border-color:#d5ead7}
.tile-7{background:#fff3e5;border-color:#ffdfbd}
.tile-8{background:#edf7ff;border-color:#d5e9ff}
.tile-9{background:#fff0f8;border-color:#f5d6e7}
.tile-10{background:#fff9df;border-color:#f0dfa1}
.tile-icon{font-size:27px;line-height:30px;margin-bottom:7px}
.class-tile b{
  display:block;color:#173b8f;font-size:12px;margin-bottom:2px
}
.class-tile small{
  display:block;color:#71809a;font-size:9px
}
.class-tile strong{
  display:block;color:#0754d5;font-size:10px;margin-top:5px
}
.popular-pill{
  position:absolute;right:7px;top:7px;
  background:#ef4b3f;color:#fff;
  border-radius:10px;padding:3px 6px;
  font-size:7px;font-weight:900;
}
.sir-box-wrap{
  min-height:350px;
  display:grid;
  place-items:center;
}
.sir-box{
  width:min(400px,100%);
  height:205px;
  background:#fff;
  border:6px solid #ffd83d;
  border-radius:23px;
  box-shadow:0 12px 28px rgba(23,59,143,.12);
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}
.sir-circle{
  position:absolute;
  left:27px;top:18px;
  width:76px;height:76px;
  border-radius:50%;
  background:#dff4e4;
}
.sir-shape{
  position:absolute;
  right:25px;bottom:15px;
  width:67px;height:58px;
  border-radius:18px;
  background:#e9defc;
  transform:rotate(10deg);
}
.books{
  position:relative;
  z-index:2;
  font-size:45px;
  line-height:50px;
}
.sir-name{
  position:relative;
  z-index:2;
  color:#1956c9;
  border:1.5px solid #c9d8f0;
  border-radius:40%;
  padding:3px 15px;
  font-size:23px;
  font-weight:900;
  margin-top:2px;
  background:#fff;
}
.sir-tagline{
  position:relative;
  z-index:2;
  color:#ef4b3f;
  font-size:11px;
  font-weight:900;
  margin-top:8px;
}
@media(max-width:850px){
  .exact-home-inner{grid-template-columns:1fr}
  .sir-box-wrap{min-height:230px}
}
@media(max-width:560px){
  .six-class-grid{grid-template-columns:repeat(2,1fr)}
  .choose-box{min-height:auto}
  .exact-home{padding:18px 4%}
}
@media(max-width:390px){
  .six-class-grid{grid-template-columns:1fr}
}

/* =========================================================
   BHUIBHAR SIR WEBSITE — VERSION 1.3
   Responsive sizing + compact spacing + light animation
   ========================================================= */

*{box-sizing:border-box}
img,svg{max-width:100%;height:auto}
body{overflow-x:hidden}

/* --- Homepage hero: use viewport efficiently --- */
.exact-home{
  min-height:clamp(360px,calc(100vh - 150px),475px);
  height:auto;
  padding:clamp(16px,2.2vw,28px) clamp(18px,5vw,5%) !important;
  display:flex;
  align-items:center;
}
.exact-home-inner{
  width:min(1120px,100%);
  margin:auto;
  grid-template-columns:minmax(0,1.08fr) minmax(300px,.92fr);
  gap:clamp(18px,3.5vw,42px);
}
.choose-box{
  width:100%;
  min-height:0;
  padding:clamp(10px,1.4vw,16px);
  border-radius:16px;
  box-shadow:0 10px 30px rgba(23,59,143,.07);
}
.choose-title{padding:0 10px 10px}
.choose-title h2{font-size:clamp(21px,2.1vw,27px)}
.choose-title p{font-size:clamp(10px,1vw,12px)}
.choose-title span{margin-left:clamp(70px,8vw,115px)}
.six-class-grid{
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(7px,1vw,11px);
}
.class-tile{
  min-height:clamp(105px,10vw,128px);
  padding:clamp(10px,1.2vw,14px);
}
.tile-icon{font-size:clamp(22px,2.4vw,29px);line-height:1.1}
.class-tile b{font-size:clamp(11px,1.1vw,13px)}
.class-tile small{font-size:clamp(8px,.85vw,10px)}
.class-tile strong{font-size:clamp(9px,.9vw,11px)}
.sir-box-wrap{min-height:0;height:100%}
.sir-box{
  width:min(390px,100%);
  height:clamp(175px,21vw,225px);
  border-width:clamp(4px,.5vw,6px);
}
.books{font-size:clamp(37px,4vw,48px)}
.sir-name{font-size:clamp(20px,2.2vw,26px)}
.sir-tagline{font-size:clamp(9px,1vw,12px)}

/* --- subtle entrance animation --- */
@keyframes bhFadeUp{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes bhFloat{
  0%,100%{transform:translateY(0) rotate(0deg)}
  50%{transform:translateY(-6px) rotate(1deg)}
}
@keyframes bhGlow{
  0%,100%{box-shadow:0 10px 28px rgba(23,59,143,.10)}
  50%{box-shadow:0 15px 38px rgba(23,86,216,.18)}
}
.exact-home .choose-box{animation:bhFadeUp .55s ease both}
.exact-home .class-tile{animation:bhFadeUp .5s ease both}
.exact-home .class-tile:nth-child(1){animation-delay:.06s}
.exact-home .class-tile:nth-child(2){animation-delay:.10s}
.exact-home .class-tile:nth-child(3){animation-delay:.14s}
.exact-home .class-tile:nth-child(4){animation-delay:.18s}
.exact-home .class-tile:nth-child(5){animation-delay:.22s}
.exact-home .class-tile:nth-child(6){animation-delay:.26s}
.exact-home .sir-box{animation:bhFadeUp .65s ease both, bhGlow 4s ease-in-out 1s infinite}
.exact-home .books{animation:bhFloat 3.2s ease-in-out 1.1s infinite}

/* --- all cards: restrained hover animation --- */
.class-card,.subject-card,.chapter-card,.resource,.feature,.quick a{
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
@media (hover:hover){
  .class-card:hover,.subject-card:hover,.chapter-card:hover,.resource:hover{
    transform:translateY(-4px);
  }
}

/* --- desktop width bands: eliminate excessive whitespace --- */
@media(min-width:1200px){
  .exact-home-inner{max-width:1160px}
  .section{padding-top:34px;padding-bottom:34px}
}

/* --- medium screens / laptops --- */
@media(max-width:1000px){
  .exact-home{
    min-height:390px;
  }
  .exact-home-inner{
    grid-template-columns:minmax(0,1fr) minmax(280px,.82fr);
  }
  .sir-box{width:min(350px,100%)}
}

/* --- tablet --- */
@media(max-width:760px){
  .exact-home{
    min-height:auto;
    padding:22px 16px 26px !important;
  }
  .exact-home-inner{
    grid-template-columns:1fr;
    gap:22px;
  }
  .choose-box{max-width:620px;margin:auto}
  .sir-box-wrap{min-height:205px}
  .sir-box{height:190px}
  .sir-box-wrap{order:2}
  .choose-box{order:1}
}

/* --- small phone: compact 2-column class grid --- */
@media(max-width:520px){
  .exact-home{padding:15px 11px 20px !important}
  .choose-box{padding:9px}
  .choose-title{padding:0 7px 9px}
  .choose-title h2{font-size:20px}
  .six-class-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
  .class-tile{
    min-height:105px;
    padding:10px;
  }
  .sir-box-wrap{min-height:180px}
  .sir-box{height:170px;width:min(340px,94vw)}
  .sir-circle{width:60px;height:60px;left:18px;top:15px}
  .sir-shape{width:54px;height:48px;right:18px;bottom:12px}
}

/* --- very narrow phones --- */
@media(max-width:350px){
  .six-class-grid{grid-template-columns:1fr 1fr}
  .class-tile{min-height:98px;padding:8px}
  .tile-icon{font-size:22px}
  .sir-box{height:155px}
  .sir-name{font-size:18px}
}

/* --- accessibility: respect reduced motion --- */
@media(prefers-reduced-motion:reduce){
  *,*:before,*:after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    scroll-behavior:auto !important;
    transition:none !important;
  }
}

/* ===== v1.3 visual enhancement: larger desktop branding ===== */
@media(min-width:1001px){
  .navbar{min-height:88px}
  .logo-cap{font-size:40px}
  .logo-name{font-size:24px;letter-spacing:.3px}
  .logo-name small{font-size:10px;letter-spacing:1.7px;margin-top:2px}
  .nav a{font-size:14px;padding:11px 14px}
}

/* ===== v1.3 animated subject/chapter banners ===== */
.page-hero{
  position:relative;
  overflow:hidden;
}
.page-hero:before,
.page-hero:after{
  pointer-events:none;
}
.page-hero:before{
  content:"";
  position:absolute;
  width:150px;height:150px;
  border-radius:50%;
  right:6%;
  top:18%;
  background:rgba(255,216,61,.18);
  animation:pageOrbOne 7s ease-in-out infinite;
}
.page-hero:after{
  content:"";
  position:absolute;
  width:110px;height:110px;
  border-radius:35%;
  left:7%;
  bottom:8%;
  background:rgba(111,168,255,.14);
  transform:rotate(18deg);
  animation:pageOrbTwo 8s ease-in-out infinite;
}
.page-hero .hero-inner{
  position:relative;
  z-index:3;
}

/* Floating educational symbols */
.page-hero .hero-inner:before,
.page-hero .hero-inner:after{
  position:absolute;
  z-index:-1;
  opacity:.13;
  font-weight:900;
  pointer-events:none;
}
.page-hero .hero-inner:before{
  content:"x + y   π   ∑   △";
  font-size:34px;
  letter-spacing:16px;
  right:4%;
  top:8%;
  animation:formulaFloat 10s linear infinite;
}
.page-hero .hero-inner:after{
  content:"✦   +   ÷   √   ∞";
  font-size:25px;
  letter-spacing:14px;
  left:3%;
  bottom:7%;
  animation:formulaFloatReverse 12s linear infinite;
}

@keyframes pageOrbOne{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(-22px,12px) scale(1.08)}
}
@keyframes pageOrbTwo{
  0%,100%{transform:rotate(18deg) translate(0,0)}
  50%{transform:rotate(35deg) translate(18px,-12px)}
}
@keyframes formulaFloat{
  0%{transform:translateX(0) translateY(0)}
  50%{transform:translateX(-25px) translateY(8px)}
  100%{transform:translateX(0) translateY(0)}
}
@keyframes formulaFloatReverse{
  0%{transform:translateX(0) translateY(0)}
  50%{transform:translateX(25px) translateY(-7px)}
  100%{transform:translateX(0) translateY(0)}
}

/* Subject pages get a softer animated background too */
.breadcrumb + .hero.page-hero{
  background:
    radial-gradient(circle at 15% 75%,rgba(74,124,255,.08),transparent 23%),
    radial-gradient(circle at 85% 20%,rgba(255,216,61,.10),transparent 25%),
    linear-gradient(110deg,#eef7ff 0%,#fffdf2 100%);
}

/* Chapter title gets a gentle entrance effect */
.page-hero h1{
  animation:bhTitleIn .55s ease both;
}
.page-hero .kicker{
  animation:bhTitleIn .4s ease both;
}
@keyframes bhTitleIn{
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:translateY(0)}
}

/* Keep mobile clean and light */
@media(max-width:760px){
  .page-hero .hero-inner:before,
  .page-hero .hero-inner:after{
    font-size:20px;
    letter-spacing:7px;
  }
  .page-hero:before{width:100px;height:100px}
  .page-hero:after{width:80px;height:80px}
}
@media(prefers-reduced-motion:reduce){
  .page-hero:before,.page-hero:after,
  .page-hero .hero-inner:before,.page-hero .hero-inner:after,
  .page-hero h1,.page-hero .kicker{
    animation:none !important;
  }
}

/* ===== v1.3 navigation + information pages ===== */
.top-back{
  max-width:1180px;
  margin:0 auto;
  padding:12px 5% 0;
}
.top-back a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 12px;
  border:1px solid #d9e1ef;
  border-radius:9px;
  background:#fff;
  color:#173b8f;
  font-size:12px;
  font-weight:900;
  box-shadow:0 4px 12px rgba(23,59,143,.05);
  transition:.18s;
}
.top-back a:hover{
  transform:translateX(-2px);
  border-color:#bfd1f1;
  background:#f5f8ff;
}
.info-page{
  min-height:420px;
}
.info-card{
  max-width:850px;
  margin:auto;
  background:#fff;
  border:1px solid #e4eaf5;
  border-radius:20px;
  padding:30px;
  box-shadow:0 12px 30px rgba(23,59,143,.08);
}
.info-card h2{color:#173b8f;margin:0 0 10px}
.info-card h3{color:#173b8f;margin-top:24px}
.info-card p,.info-card li{color:#5f708e;font-size:14px}
.info-card ul{padding-left:22px}
.info-links{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:13px;
  margin-top:24px;
}
.info-link{
  background:#f5f8ff;
  border:1px solid #dfe8f7;
  border-radius:14px;
  padding:16px;
  color:#173b8f;
  font-weight:900;
}
@media(max-width:700px){
  .info-card{padding:21px}
  .info-links{grid-template-columns:1fr}
}

/* ===== About / Contact additions ===== */
.about-highlight{
  display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:22px 0;
}
.about-box{
  padding:20px;border-radius:16px;border:1px solid #e2e8f4;
  background:linear-gradient(135deg,#f5f8ff,#fff);
}
.about-box:nth-child(2){background:linear-gradient(135deg,#fff8e3,#fff)}
.about-box .big{font-size:32px}.about-box h3{margin:6px 0;color:#173b8f}.about-box p{margin:0}
.contact-layout{
  display:grid;grid-template-columns:1fr 1.25fr;gap:22px;align-items:start;
}
.contact-side{
  background:linear-gradient(145deg,#173b8f,#2858b8);
  color:#fff;border-radius:20px;padding:25px;
}
.contact-side h2{color:#fff;margin-top:0}.contact-side p,.contact-side li{color:#eaf0ff}
.contact-side ul{padding-left:20px}
.contact-form{
  background:#fff;border:1px solid #e2e8f4;border-radius:20px;padding:25px;
  box-shadow:0 12px 30px rgba(23,59,143,.08);
}
.contact-form h2{color:#173b8f;margin-top:0}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.form-group{margin-bottom:14px}.form-group label{display:block;font-size:12px;font-weight:900;color:#405577;margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{
  width:100%;padding:12px 13px;border:1px solid #d9e2f0;border-radius:10px;
  font:inherit;font-size:13px;outline:none;background:#fbfcff;
}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{
  border-color:#4d7ee8;box-shadow:0 0 0 3px rgba(77,126,232,.10);
}
.form-group textarea{min-height:130px;resize:vertical}
.submit-btn{
  border:0;background:#173b8f;color:#fff;padding:12px 20px;border-radius:10px;
  font-weight:900;cursor:pointer;transition:.18s;
}
.submit-btn:hover{background:#1d5bd7;transform:translateY(-1px)}
.whatsapp-btn{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;
  background:#22a95a;color:#fff;padding:12px 17px;border-radius:10px;font-weight:900;
}
.whatsapp-btn:hover{background:#168d49}
.form-note{font-size:10px;color:#7a879c;margin-top:10px}
@media(max-width:750px){
  .about-highlight,.contact-layout,.form-row{grid-template-columns:1fr}
}

.form-success{
  margin-top:15px;padding:13px 15px;border-radius:12px;
  background:#eaf8ee;border:1px solid #b9e3c4;color:#23723a;
  display:flex;align-items:center;gap:10px;font-size:12px;
}
.success-icon{
  width:30px;height:30px;border-radius:50%;background:#39a85a;color:#fff;
  display:grid;place-items:center;font-weight:900;font-size:17px;flex:0 0 30px;
}
.resource{display:block;text-decoration:none;color:inherit}

/* Global stacked-fraction formatting for formulas and numerical answers */
.frac{display:inline-flex;vertical-align:middle;flex-direction:column;align-items:center;line-height:1;text-align:center;margin:0 4px;min-width:24px}.frac .top,.frac .num{padding:0 6px 3px;border-bottom:1.5px solid currentColor}.frac .bottom,.frac .den{padding-top:3px}.math .frac,.formula .frac{font-family:"Times New Roman",serif}