/* =========================================================
   GOURAV STUDY ZONE — COLORFUL PREMIUM BRAND THEME
   One visual system for every page
========================================================= */

:root{
  --ink:#173154;
  --ink-2:#28476e;
  --muted:#667a98;
  --bg:#f7f9ff;
  --surface:rgba(255,255,255,.88);
  --surface-solid:#fff;
  --border:rgba(91,111,157,.14);

  --blue:#188ee8;
  --cyan:#28c6e9;
  --indigo:#5368f6;
  --purple:#7657ff;
  --pink:#f15aaa;
  --orange:#ff8d4d;
  --yellow:#ffbf3f;
  --green:#20b981;

  --grad-main:linear-gradient(125deg,#168fe6 0%,#5269f2 35%,#7657ff 66%,#eb5ba7 100%);
  --grad-cool:linear-gradient(135deg,#19a9e5,#536af4,#7757ff);
  --grad-warm:linear-gradient(135deg,#ff9b50,#ff6b86,#ed5ab1);
  --grad-soft:linear-gradient(135deg,#eef9ff 0%,#f3efff 47%,#fff5ed 100%);
  --grad-mint:linear-gradient(135deg,#e8fff7,#eaf9ff,#f3efff);

  --shadow-sm:0 8px 24px rgba(36,62,110,.08);
  --shadow:0 16px 42px rgba(36,62,110,.12);
  --shadow-hover:0 22px 52px rgba(45,73,135,.18);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--ink);
  font-family:Inter,"Segoe UI",Arial,Helvetica,sans-serif;
  line-height:1.6;
  overflow-x:hidden;
  background:
    radial-gradient(circle at 8% 11%,rgba(40,198,233,.13),transparent 25rem),
    radial-gradient(circle at 92% 20%,rgba(241,90,170,.11),transparent 24rem),
    radial-gradient(circle at 55% 83%,rgba(118,87,255,.10),transparent 28rem),
    linear-gradient(180deg,#fbfcff 0%,#f5f8ff 48%,#faf7ff 100%);
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:-1;
  opacity:.28;
  background-image:
    linear-gradient(rgba(69,103,180,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(69,103,180,.045) 1px,transparent 1px);
  background-size:38px 38px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.65),transparent 92%);
}

img{max-width:100%;display:block}
a{color:inherit}
button,input{font:inherit}
.container{width:min(1180px,92%);margin-inline:auto}
.hidden{display:none!important}

/* =========================================================
   HEADER — glassy, branded, colorful but clean
========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(255,255,255,.84);
  border-bottom:1px solid rgba(88,107,155,.10);
  backdrop-filter:blur(18px) saturate(1.25);
  -webkit-backdrop-filter:blur(18px) saturate(1.25);
  box-shadow:0 8px 28px rgba(38,62,105,.08);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:3px;
  background:linear-gradient(90deg,#20bfe8,#5368f6,#7657ff,#ef5ba9,#ff9b50,#20bfe8);
  background-size:320% 100%;
  animation:brandLine 8s linear infinite;
}
@keyframes brandLine{to{background-position:320% 0}}

.nav{
  min-height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  position:relative;
  display:flex;
  align-items:center;
  gap:0;
  text-decoration:none;
  font-weight:950;
  font-size:1.12rem;
  letter-spacing:-.2px;
  background:linear-gradient(90deg,#16375d,#5368f6 56%,#7657ff);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  transition:transform .25s ease,filter .25s ease;
}
.brand:hover{transform:translateY(-1px);filter:saturate(1.25)}
.brand-logo{display:none!important}

.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;
  padding:10px 11px;
  border-radius:11px;
  color:#405574;
  text-decoration:none;
  font-size:.90rem;
  font-weight:800;
  transition:color .22s ease,background .22s ease,transform .22s ease;
}
.nav-links a:hover{
  color:#4f56df;
  background:linear-gradient(135deg,rgba(40,198,233,.08),rgba(118,87,255,.09));
  transform:translateY(-2px);
}
.nav-links a.active{
  color:#fff;
  background:var(--grad-cool);
  box-shadow:0 8px 18px rgba(83,104,246,.20);
}
.menu-btn{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:0;border-radius:13px;
  color:#fff;
  background:var(--grad-cool);
  box-shadow:0 8px 20px rgba(83,104,246,.22);
  cursor:pointer;
}

/* =========================================================
   HOME HERO — branded colorful flagship
========================================================= */
.hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  margin:30px auto 16px;
  padding:44px 28px 40px;
  border-radius:30px;
  color:#fff;
  text-align:center;
  background:var(--grad-main);
  background-size:260% 260%;
  animation:heroMesh 11s ease infinite;
  box-shadow:0 24px 60px rgba(72,82,200,.23),inset 0 1px 0 rgba(255,255,255,.25);
}
@keyframes heroMesh{
  0%{background-position:0% 50%}
  50%{background-position:100% 50%}
  100%{background-position:0% 50%}
}
.hero::before,.hero::after{
  content:"";
  position:absolute;
  border-radius:50%;
  z-index:-1;
  animation:orbFloat 7s ease-in-out infinite;
}
.hero::before{
  width:260px;height:260px;
  left:-110px;top:-135px;
  background:rgba(255,255,255,.14);
  box-shadow:0 0 60px rgba(255,255,255,.10);
}
.hero::after{
  width:330px;height:330px;
  right:-150px;bottom:-200px;
  background:rgba(255,220,246,.13);
  animation-delay:-2.5s;
}
@keyframes orbFloat{50%{transform:translate(16px,10px) scale(1.05)}}
.hero-inner{position:relative;z-index:2;max-width:940px;margin:auto}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 15px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.32);
  background:rgba(255,255,255,.14);
  backdrop-filter:blur(10px);
  font-size:.72rem;
  font-weight:900;
  letter-spacing:.09em;
  box-shadow:0 8px 22px rgba(40,31,109,.13);
}
.hero h1{
  margin:14px 0 5px;
  font-size:clamp(2.35rem,5vw,4rem);
  line-height:1.03;
  font-weight:950;
  letter-spacing:-1.3px;
  text-shadow:0 8px 24px rgba(31,36,120,.18);
}
.hero .lead{margin:0 0 8px;font-size:clamp(1rem,2vw,1.24rem);font-weight:760;color:rgba(255,255,255,.96)}
.hero .desc{max-width:780px;margin:0 auto 18px;color:rgba(255,255,255,.88);font-size:.92rem;line-height:1.7}
.hero-highlights{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.hero-highlights span{
  padding:7px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.20);
  color:#fff;
  font-size:.76rem;
  font-weight:800;
  backdrop-filter:blur(8px);
  transition:transform .25s ease,background .25s ease;
}
.hero-highlights span:hover{transform:translateY(-3px);background:rgba(255,255,255,.19)}

/* =========================================================
   BUTTONS
========================================================= */
.btn,.books-home-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 17px;
  border:0;
  border-radius:12px;
  text-decoration:none;
  font-weight:850;
  cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,filter .25s ease;
}
.btn:hover,.books-home-btn:hover{transform:translateY(-3px);filter:saturate(1.10)}
.btn-blue,.btn-primary,.books-home-btn{
  color:#fff;
  background:var(--grad-cool);
  box-shadow:0 9px 22px rgba(83,104,246,.20);
}
.btn-blue:hover,.btn-primary:hover,.books-home-btn:hover{box-shadow:0 14px 28px rgba(83,104,246,.29)}
.btn-soft{
  color:#5257d9;
  background:linear-gradient(135deg,#eef9ff,#f2efff);
  border:1px solid rgba(83,104,246,.10);
  box-shadow:0 6px 16px rgba(65,91,147,.06);
}
.btn-light{background:#fff;color:#5368f6;box-shadow:0 10px 24px rgba(48,50,120,.14)}
.btn-green{background:linear-gradient(135deg,#e8fff6,#e8faff);color:#168a67}

/* =========================================================
   NOTIFICATION
========================================================= */
.notification{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  margin:14px auto 36px;
  padding:12px 15px;
  border-radius:16px;
  border:1px solid rgba(83,104,246,.12);
  background:rgba(255,255,255,.88);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.notification::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:5px;
  background:linear-gradient(#28c6e9,#7657ff,#f15aaa);
}
.new-badge{
  flex:0 0 auto;
  padding:6px 11px;
  border-radius:999px;
  color:#fff;
  background:linear-gradient(135deg,#ff6a85,#f15aaa);
  font-size:.68rem;
  font-weight:950;
  box-shadow:0 7px 16px rgba(241,90,170,.22);
}
.ticker{overflow:hidden;white-space:nowrap;flex:1}
.ticker span{display:inline-block;padding-left:100%;font-size:.86rem;font-weight:800;color:#48617f;animation:tickerMove 18s linear infinite}
@keyframes tickerMove{to{transform:translateX(-100%)}}
.notification:hover .ticker span{animation-play-state:paused}

/* =========================================================
   SECTION HEADINGS
========================================================= */
.section-heading{
  display:flex;
  align-items:center;
  gap:18px;
  margin:40px 0 24px;
}
.section-heading::before,.section-heading::after{
  content:"";
  height:3px;
  flex:1;
  border-radius:999px;
  background:linear-gradient(90deg,transparent,rgba(83,104,246,.22),rgba(241,90,170,.20),transparent);
}
.section-heading h2{
  margin:0;
  white-space:nowrap;
  font-size:clamp(1.72rem,3.6vw,2.55rem);
  line-height:1.15;
  font-weight:950;
  letter-spacing:-.6px;
  background:linear-gradient(90deg,#16365a 0%,#5368f6 52%,#7657ff 78%,#e459a8 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* =========================================================
   SERVICE CARDS — six branded color identities
========================================================= */
.services{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-bottom:34px;
}
.service-card{
  --accent1:#5368f6;
  --accent2:#7657ff;
  position:relative;
  overflow:hidden;
  padding:20px 20px 22px;
  text-align:center;
  border-radius:23px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.90);
  box-shadow:var(--shadow);
  transition:transform .30s ease,box-shadow .30s ease,border-color .30s ease;
}
.service-card::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:5px;
  background:linear-gradient(90deg,var(--accent1),var(--accent2));
}
.service-card::after{
  content:"";
  position:absolute;
  width:120px;height:120px;
  right:-55px;top:-55px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--accent1),var(--accent2));
  opacity:.06;
  transition:transform .35s ease,opacity .35s ease;
}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:rgba(83,104,246,.18)}
.service-card:hover::after{transform:scale(1.25);opacity:.10}
.service-card:nth-child(1){--accent1:#6d5dfc;--accent2:#9a5cff}
.service-card:nth-child(2){--accent1:#169fe6;--accent2:#45c6e8}
.service-card:nth-child(3){--accent1:#ee5aaa;--accent2:#ff7e8d}
.service-card:nth-child(4){--accent1:#20b981;--accent2:#4ed8a8}
.service-card:nth-child(5){--accent1:#ff9b4e;--accent2:#ffbd45}
.service-card:nth-child(6){--accent1:#5368f6;--accent2:#28c6e9}
.service-icon{
  width:112px;
  height:112px;
  object-fit:contain;
  margin:2px auto 5px;
  filter:drop-shadow(0 10px 16px rgba(43,69,130,.12));
  transition:transform .32s cubic-bezier(.2,.8,.2,1);
}
.service-card:hover .service-icon{transform:translateY(-4px) scale(1.06) rotate(-2deg)}
.service-card h3{margin:7px 0 6px;font-size:1.05rem;color:#17365c}
.service-card p{margin:0 0 15px;color:var(--muted);font-size:.86rem;line-height:1.6}

/* =========================================================
   ENGINEERING BOOKS FEATURE BANNER
========================================================= */
.books-home-section{
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  gap:22px;
  width:100%;
  margin:10px 0 40px;
  padding:23px 26px;
  border-radius:23px;
  background:var(--grad-soft);
  border:1px solid rgba(83,104,246,.10);
  box-shadow:var(--shadow);
  transition:transform .28s ease,box-shadow .28s ease;
}
.books-home-section::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(105deg,transparent 0%,rgba(255,255,255,.5) 42%,transparent 62%);
  transform:translateX(-110%);
  animation:bannerShine 7s ease-in-out infinite;
}
@keyframes bannerShine{55%,100%{transform:translateX(120%)}}
.books-home-section:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.books-home-icon{
  width:72px;height:72px;
  flex-shrink:0;
  display:grid;place-items:center;
  border-radius:20px;
  color:#fff;
  background:var(--grad-cool);
  font-size:32px;
  box-shadow:0 12px 25px rgba(83,104,246,.23);
}
.books-home-content{position:relative;z-index:2;flex:1}
.books-small-title{display:block;margin-bottom:3px;color:#6857ef;font-size:.72rem;font-weight:950;letter-spacing:.14em}
.books-home-content h2{margin:0 0 4px;color:#17365c;font-size:clamp(1.45rem,3vw,2.05rem);line-height:1.22}
.books-home-content p{margin:0;color:var(--muted);font-size:.88rem}
.books-home-btn{position:relative;z-index:2;flex-shrink:0}

/* =========================================================
   QUICK LINKS — one premium full-width line each
========================================================= */
.quick-links-heading{margin-bottom:8px}
.quick-links-subtitle{text-align:center;margin:-2px 0 20px;color:var(--muted);font-size:.86rem}
.quick-links-grid{display:grid;grid-template-columns:1fr;gap:12px;margin-bottom:38px}
.quick-link-card{
  --q1:#188ee8;
  --q2:#7657ff;
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  gap:16px;
  min-height:82px;
  padding:13px 17px;
  border-radius:18px;
  text-decoration:none;
  color:inherit;
  background:rgba(255,255,255,.88);
  border:1px solid rgba(83,104,246,.10);
  box-shadow:var(--shadow-sm);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.quick-link-card:nth-child(2n){--q1:#7657ff;--q2:#f15aaa}
.quick-link-card:nth-child(3n){--q1:#20b981;--q2:#28c6e9}
.quick-link-card:nth-child(4n){--q1:#ff8d4d;--q2:#f15aaa}
.quick-link-card::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:5px;
  background:linear-gradient(var(--q1),var(--q2));
}
.quick-link-card:hover{transform:translateX(5px);box-shadow:var(--shadow);border-color:rgba(83,104,246,.18)}
.quick-link-icon{
  width:50px;height:50px;
  flex-shrink:0;
  display:grid;place-items:center;
  border-radius:14px;
  background:linear-gradient(135deg,color-mix(in srgb,var(--q1) 13%,white),color-mix(in srgb,var(--q2) 12%,white));
  font-size:23px;
  transition:transform .28s ease;
}
.quick-link-card:hover .quick-link-icon{transform:scale(1.08) rotate(-4deg)}
.quick-link-card>div{flex:1;display:flex;align-items:center;justify-content:space-between;gap:16px;position:relative;z-index:2}
.quick-link-card h3{margin:0;color:#17365c;font-size:.94rem;line-height:1.35}
.quick-link-card p{
  flex-shrink:0;
  margin:0;
  padding:8px 12px;
  border-radius:10px;
  color:#fff;
  background:linear-gradient(135deg,var(--q1),var(--q2));
  font-size:.72rem;
  font-weight:850;
  box-shadow:0 7px 15px color-mix(in srgb,var(--q1) 20%,transparent);
}

/* =========================================================
   SOCIAL CHANNELS
========================================================= */
.compact-social{
  margin:26px 0 36px;
  padding:22px;
  border-radius:22px;
  background:linear-gradient(135deg,#f0fbff,#f5f0ff,#fff5f8);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.compact-social-title{text-align:center;margin-bottom:15px}
.compact-social-title h2{margin:0;font-size:1.45rem;color:#17365c}
.compact-social-title p{margin:4px 0 0;color:var(--muted);font-size:.82rem}
.compact-social-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.compact-social-card{
  display:flex;align-items:center;gap:11px;
  min-height:70px;padding:11px 13px;
  border-radius:15px;
  background:rgba(255,255,255,.91);
  border:1px solid rgba(68,91,142,.09);
  text-decoration:none;
  box-shadow:0 7px 17px rgba(36,62,110,.06);
  transition:transform .25s ease,box-shadow .25s ease;
}
.compact-social-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px rgba(36,62,110,.12)}
.compact-icon{width:44px;height:44px;flex-shrink:0;display:grid;place-items:center;border-radius:13px}
.compact-icon svg{width:28px;height:28px}
.whatsapp-icon{background:#e9fff1}.telegram-icon{background:#e9f8ff}.youtube-icon{background:#fff0f1}
.whatsapp-card{border-left:4px solid #25d366}.telegram-card{border-left:4px solid #2aabee}.youtube-card{border-left:4px solid #ff3131}
.compact-social-info h3{margin:0 0 2px;font-size:.92rem;color:#17365c}
.compact-social-info span{font-size:.72rem;font-weight:850}
.whatsapp-card span{color:#159b49}.telegram-card span{color:#168bc7}.youtube-card span{color:#dd3030}

/* =========================================================
   HOW IT WORKS + LATEST UPDATES
========================================================= */
.how{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:42px}
.how-card{
  position:relative;
  overflow:hidden;
  padding:20px;
  border-radius:18px;
  background:rgba(255,255,255,.88);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:transform .27s ease,box-shadow .27s ease;
}
.how-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(#28c6e9,#7657ff)}
.how-card:nth-child(2)::before{background:linear-gradient(#7657ff,#f15aaa)}
.how-card:nth-child(3)::before{background:linear-gradient(#20b981,#28c6e9)}
.how-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.how-card strong{display:block;margin-bottom:5px;color:#17365c}
.how-card span{color:var(--muted);font-size:.85rem}

.updates{
  padding:18px;
  margin-bottom:42px;
  border-radius:22px;
  background:linear-gradient(135deg,#fff8eb,#fff,#edf8ff);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.update-item{
  position:relative;
  margin:9px 0;
  padding:12px 14px 12px 18px;
  border-radius:12px;
  background:#fff;
  border:1px solid rgba(74,93,140,.07);
  color:#48617f;
  font-size:.86rem;
  font-weight:700;
  box-shadow:0 5px 13px rgba(36,62,110,.05);
}
.update-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;border-radius:12px 0 0 12px;background:linear-gradient(#ff9b4e,#f15aaa,#7657ff)}

/* =========================================================
   INNER PAGE HERO
========================================================= */
.page-hero{
  position:relative;
  overflow:hidden;
  margin:28px 0 24px;
  padding:32px 26px;
  border-radius:24px;
  background:var(--grad-soft);
  border:1px solid rgba(83,104,246,.11);
  box-shadow:var(--shadow);
}
.page-hero::after{content:"";position:absolute;width:180px;height:180px;border-radius:50%;right:-70px;top:-95px;background:linear-gradient(135deg,rgba(40,198,233,.16),rgba(118,87,255,.13));animation:pageOrb 6s ease-in-out infinite}
@keyframes pageOrb{50%{transform:translate(-10px,10px) scale(1.08)}}
.page-hero>*{position:relative;z-index:2}
.page-hero .crumbs{font-size:.78rem;color:#7184a0;margin-bottom:8px}
.page-hero .crumbs a{color:#5368f6;text-decoration:none;font-weight:800}
.page-hero h1{margin:0 0 6px;color:#17365c;font-size:clamp(1.85rem,4.4vw,2.85rem);line-height:1.15;letter-spacing:-.7px}
.page-hero p{margin:0;color:var(--muted);font-size:.88rem}

/* =========================================================
   SEMESTER / SUBJECT / RESOURCE CARDS
========================================================= */
.semester-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px;margin-bottom:46px}
.semester-card{
  position:relative;
  overflow:hidden;
  padding:21px;
  border-radius:19px;
  background:rgba(255,255,255,.91);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:transform .28s ease,box-shadow .28s ease;
}
.semester-card::after{content:"";position:absolute;width:105px;height:105px;border-radius:50%;right:-47px;top:-46px;background:linear-gradient(135deg,#28c6e9,#7657ff);opacity:.07}
.semester-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.semester-number{
  display:grid;place-items:center;
  width:48px;height:48px;
  border-radius:14px;
  color:#fff;
  font-size:1rem;
  font-weight:950;
  background:var(--grad-cool);
  box-shadow:0 9px 20px rgba(83,104,246,.20);
}
.semester-card:nth-child(2n) .semester-number{background:linear-gradient(135deg,#7657ff,#ef5aaa)}
.semester-card:nth-child(3n) .semester-number{background:linear-gradient(135deg,#20b981,#28c6e9)}
.semester-card h3{margin:11px 0 4px;color:#17365c}
.semester-card p{margin:0 0 13px;color:var(--muted);font-size:.84rem}

.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin:5px 0 19px}
.search{
  width:min(430px,100%);
  padding:12px 14px;
  outline:0;
  border-radius:13px;
  border:1px solid rgba(83,104,246,.14);
  background:rgba(255,255,255,.92);
  color:var(--ink);
  box-shadow:0 6px 17px rgba(36,62,110,.05);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search:focus{border-color:#7986ff;box-shadow:0 0 0 4px rgba(83,104,246,.09),0 8px 22px rgba(36,62,110,.07)}
.resource-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:17px;margin-bottom:46px}
.resource-card{
  position:relative;
  overflow:hidden;
  padding:20px;
  border-radius:19px;
  background:rgba(255,255,255,.92);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:transform .27s ease,box-shadow .27s ease;
}
.resource-card::before{content:"";position:absolute;left:0;top:0;right:0;height:4px;background:linear-gradient(90deg,#28c6e9,#5368f6,#7657ff,#f15aaa)}
.resource-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.resource-card h3{margin:0 0 4px;color:#17365c}
.resource-card .meta,.meta{color:#788aa5;font-size:.80rem;margin-bottom:12px}
.resource-card>p{color:var(--muted);font-size:.86rem}
.link-list{display:grid;gap:9px}
.resource-link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 12px;
  border-radius:11px;
  border:1px solid rgba(74,93,140,.10);
  background:linear-gradient(135deg,#fbfdff,#f8f7ff);
  text-decoration:none;
  color:#425d7f;
  font-size:.84rem;
  font-weight:780;
  transition:transform .22s ease,background .22s ease,border-color .22s ease;
}
.resource-link:hover{transform:translateX(4px);background:linear-gradient(135deg,#eef9ff,#f1efff);border-color:rgba(83,104,246,.18)}
.resource-link.disabled{opacity:.58;cursor:not-allowed;transform:none}
.resource-link small{font-weight:850;color:#5368f6}
.empty{grid-column:1/-1;padding:28px;border:1px dashed rgba(83,104,246,.24);background:rgba(255,255,255,.80);border-radius:17px;text-align:center;color:var(--muted)}
/* only single selected resource card uses the full grid width */
.resource-grid>.resource-card:only-child{grid-column:1/-1;width:100%}

/* =========================================================
   BOOK PAGE
========================================================= */
.book-card{display:flex;flex-direction:column;justify-content:space-between;gap:17px}
.book-card-top{display:flex;align-items:flex-start;gap:13px}
.book-icon{width:48px;height:48px;flex-shrink:0;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,#e9f9ff,#f0edff);font-size:25px}
.book-download,.book-disabled{width:100%}
.book-disabled{color:#8492a7;background:#eef1f6;cursor:not-allowed}
#booksGrid{grid-template-columns:repeat(2,1fr)}

/* =========================================================
   INTERVIEW
========================================================= */
.company-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:17px;margin-bottom:46px}
.company-card{
  position:relative;
  overflow:hidden;
  padding:20px;
  border-radius:19px;
  background:rgba(255,255,255,.92);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:transform .27s ease,box-shadow .27s ease;
}
.company-card::before{content:"";position:absolute;left:0;top:0;right:0;height:4px;background:linear-gradient(90deg,#ff9b4e,#f15aaa,#7657ff)}
.company-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.company-title{display:flex;align-items:center;gap:11px;margin-bottom:11px}
.company-avatar{width:46px;height:46px;display:grid;place-items:center;border-radius:13px;background:linear-gradient(135deg,#fff1e7,#f3efff);font-size:1.35rem}
.company-card h3{margin:0;color:#17365c}.company-card p{margin:2px 0 0;color:var(--muted);font-size:.80rem}

/* =========================================================
   JELET
========================================================= */
.jelet-top{display:grid;grid-template-columns:repeat(2,1fr);gap:17px;margin-bottom:28px}
.jelet-feature{
  position:relative;overflow:hidden;padding:22px;border-radius:20px;
  background:rgba(255,255,255,.92);border:1px solid var(--border);box-shadow:var(--shadow-sm);
  transition:transform .27s ease,box-shadow .27s ease;
}
.jelet-feature:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.jelet-feature:nth-child(1){background:linear-gradient(135deg,#f1faff,#f4f0ff)}
.jelet-feature:nth-child(2){background:linear-gradient(135deg,#fff6ed,#fff0f8)}
.jelet-feature .big-icon{font-size:2rem}.jelet-feature h3{margin:7px 0 5px;color:#17365c}.jelet-feature p{color:var(--muted);font-size:.84rem}

/* =========================================================
   FOOTER
========================================================= */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:48px;
  padding:30px 0;
  color:#eaf3ff;
  background:linear-gradient(115deg,#173b67,#344ca8,#6254cf);
  box-shadow:0 -10px 30px rgba(42,62,120,.10);
}
.site-footer::before{content:"";position:absolute;width:220px;height:220px;border-radius:50%;right:-80px;top:-130px;background:rgba(255,255,255,.08)}
.footer-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer-inner strong{font-size:.95rem}.footer-inner small{color:rgba(255,255,255,.78)}

/* =========================================================
   REVEAL ANIMATION (JS adds classes)
========================================================= */
.reveal-item{opacity:0;transform:translateY(20px);transition:opacity .65s ease,transform .65s cubic-bezier(.2,.7,.2,1)}
.reveal-item.is-visible{opacity:1;transform:translateY(0)}

/* reduced motion */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.001ms!important}
  .reveal-item{opacity:1!important;transform:none!important}
}

/* =========================================================
   RESPONSIVE
========================================================= */
@media(max-width:980px){
  .services,.semester-grid{grid-template-columns:repeat(2,1fr)}
  .how{grid-template-columns:1fr}
}

@media(max-width:760px){
  .nav{min-height:68px}
  .brand{font-size:1rem}
  .menu-btn{display:flex}
  .nav-links{
    display:none;
    position:absolute;
    top:calc(100% + 10px);
    left:4%;right:4%;
    flex-direction:column;
    align-items:stretch;
    gap:5px;
    padding:11px;
    border-radius:18px;
    background:rgba(255,255,255,.97);
    border:1px solid rgba(83,104,246,.10);
    box-shadow:0 18px 45px rgba(42,62,120,.20);
    backdrop-filter:blur(18px);
  }
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:10px 12px}
  .hero{margin-top:20px;padding:34px 18px 31px;border-radius:23px}
  .hero h1{font-size:clamp(2rem,10vw,3rem)}
  .hero .desc{font-size:.83rem}
  .services,.semester-grid,.resource-grid,.company-grid,.jelet-top,#booksGrid{grid-template-columns:1fr}
  .books-home-section{flex-direction:column;text-align:center;padding:22px 17px}
  .books-home-btn{width:100%}
  .compact-social-grid{grid-template-columns:1fr}
  .quick-link-card>div{gap:10px}
}

@media(max-width:520px){
  .container{width:min(94%,1180px)}
  .section-heading{gap:10px;margin-top:32px}
  .section-heading h2{font-size:1.55rem}
  .service-icon{width:95px;height:95px}
  .page-hero{padding:25px 18px;border-radius:20px}
  .page-hero h1{font-size:1.85rem}
  .quick-link-card{padding:12px 13px;gap:11px;min-height:76px}
  .quick-link-icon{width:44px;height:44px;font-size:20px}
  .quick-link-card>div{flex-direction:column;align-items:flex-start}
  .quick-link-card h3{font-size:.86rem}
  .quick-link-card p{padding:6px 9px;font-size:.66rem}
  .hero-highlights{gap:7px}
  .hero-highlights span{font-size:.68rem;padding:6px 9px}
  .footer-inner{justify-content:center;text-align:center}
}