/* ============================================================
   Nalanda Institution — Shared Theme
   Tokens, base typography, buttons, top bar, header nav,
   reusable section heads, trust strip, CTA, footer.
   Page-specific styles live in assets/css/<page>.css
   ============================================================ */

:root{
  --navy:#0a2342;
  --navy-2:#11335c;
  --blue:#1f6fc2;
  --blue-bright:#2f86e0;
  --gold:#c8a14a;
  --ink:#0d2138;
  --text:#41505f;
  --muted:#7c8896;
  --line:#e4e9ef;
  --bg:#ffffff;
  --bg-soft:#f5f7fa;
  --maxw:1240px;
}

/* ---- base ---- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4,.display{font-family:'Archivo',system-ui,sans-serif;color:var(--ink);letter-spacing:-.02em;line-height:1.08;font-weight:800}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.eyebrow{font-family:'Archivo';font-size:12.5px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--blue)}
.eyebrow.on-dark{color:#9fd0ff}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:'Archivo';font-weight:700;font-size:14px;padding:12px 24px;border-radius:6px;transition:.25s;cursor:pointer;letter-spacing:.02em;line-height:1;white-space:nowrap}
.btn-primary{background:var(--gold);color:#fff;box-shadow:0 4px 14px -4px rgba(200,161,74,.55)}
.btn-primary:hover{background:var(--navy);color:#fff;box-shadow:0 6px 18px -6px rgba(10,35,66,.45);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:var(--gold);color:#fff}
.btn-outline{border:1.5px solid rgba(255,255,255,.55);color:#fff}
.btn-outline:hover{background:#fff;color:var(--navy);border-color:#fff}
.arrow::after{content:"→";font-family:'Archivo'}

/* ---- top bar ---- */
.topbar{background:var(--navy);color:#cdd8e6;font-size:12.5px}
.topbar .wrap{display:flex;justify-content:flex-end;gap:24px;height:38px;align-items:center}
.topbar a{color:#cdd8e6;transition:color .2s;font-weight:500}
.topbar a:hover{color:#fff}
@media(max-width:760px){.topbar{display:none}}

/* ---- nav ---- */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);border-bottom:1px solid rgba(228,233,239,.82);backdrop-filter:blur(18px);box-shadow:0 16px 42px -38px rgba(10,35,66,.6);transition:box-shadow .28s,border-color .28s,background .28s}
header.scrolled{background:rgba(255,255,255,.96);border-bottom-color:rgba(200,161,74,.32);box-shadow:0 20px 46px -32px rgba(10,35,66,.55)}
header .bar{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:86px;transition:min-height .28s}
header.scrolled .bar{min-height:74px}
.logo{display:inline-flex;align-items:center;gap:13px;text-align:left;min-width:max-content}
.logo-mark-wrap{position:relative;display:grid;place-items:center;width:68px;height:68px;border-radius:18px;background:linear-gradient(145deg,#fff,#f2f6fb);box-shadow:inset 0 0 0 1px rgba(10,35,66,.08),0 14px 30px -22px rgba(10,35,66,.7);transition:transform .28s,box-shadow .28s}
.logo-mark-wrap::after{content:"";position:absolute;inset:7px;border-radius:14px;border:1px solid rgba(200,161,74,.26);pointer-events:none}
.logo:hover .logo-mark-wrap{transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(10,35,66,.08),0 18px 34px -22px rgba(10,35,66,.75)}
.logo .mark{height:58px;width:auto;display:block;position:relative;z-index:1}
.logo-copy{display:flex;flex-direction:column;gap:3px}
.logo .nm{font-family:'Archivo';font-weight:900;font-size:16px;color:var(--navy);line-height:1;letter-spacing:0}
.logo .tag{font-family:'Inter';font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--gold)}
nav.menu{display:flex;align-items:center;gap:4px;padding:7px;border:1px solid rgba(228,233,239,.78);border-radius:999px;background:rgba(245,247,250,.7);box-shadow:inset 0 1px 0 rgba(255,255,255,.9)}
nav.menu a{font-family:'Archivo';font-size:13.5px;font-weight:700;color:var(--ink);transition:color .2s,background .2s,box-shadow .2s,transform .2s;position:relative;display:inline-flex;align-items:center;gap:7px;padding:10px 12px;border-radius:999px;line-height:1;white-space:nowrap}
nav.menu a.btn{padding:12px 18px}
.menu-item{position:relative}
.menu-item > a:not(.btn)::after{content:"";position:absolute;left:50%;bottom:5px;height:3px;width:0;background:linear-gradient(90deg,var(--gold),var(--blue));border-radius:999px;transform:translateX(-50%);transition:width .24s}
.menu-item > a:not(.btn):hover,
.menu-item > a.active{color:var(--navy);background:#fff;box-shadow:0 9px 24px -20px rgba(10,35,66,.7)}
.menu-item > a:not(.btn):hover::after,
.menu-item > a.active::after{width:22px}
.menu-item.has-sub > a::before{content:"";width:6px;height:6px;border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;transform:rotate(45deg) translateY(-2px);opacity:.54;order:2;transition:transform .22s,opacity .22s}
.menu-item.has-sub:hover > a::before,
.menu-item.has-sub:focus-within > a::before{transform:rotate(225deg) translate(-1px,-1px);opacity:.9}
.submenu{position:absolute;top:calc(100% + 16px);left:50%;min-width:270px;background:rgba(255,255,255,.98);border:1px solid rgba(228,233,239,.92);box-shadow:0 26px 70px -36px rgba(10,35,66,.55);padding:8px;border-radius:16px;opacity:0;visibility:hidden;transform:translate(-50%,8px) scale(.98);transition:opacity .2s,transform .2s,visibility .2s;z-index:10}
.submenu::before{content:"";position:absolute;top:-7px;left:50%;width:14px;height:14px;background:inherit;border-left:1px solid rgba(228,233,239,.92);border-top:1px solid rgba(228,233,239,.92);transform:translateX(-50%) rotate(45deg)}
.submenu::after{content:"";position:absolute;left:0;right:0;top:-18px;height:18px}
.menu-item.has-sub:hover > .submenu,
.menu-item.has-sub:focus-within > .submenu{opacity:1;visibility:visible;transform:translate(-50%,0) scale(1)}
.menu-item.has-sub::after{content:"";position:absolute;top:100%;left:0;right:0;height:16px}
.submenu a{display:flex;padding:12px 14px;font-size:13.5px;font-weight:700;color:var(--ink);white-space:nowrap;border-radius:10px}
.submenu a::after{display:none !important}
.submenu a:hover{background:linear-gradient(90deg,rgba(31,111,194,.1),rgba(200,161,74,.12));color:var(--blue);transform:translateX(3px);box-shadow:none}
.nav-cta{margin-left:4px;background:linear-gradient(135deg,var(--gold),#d8b868);box-shadow:0 14px 30px -18px rgba(140,95,10,.8)}
.nav-cta:hover{background:linear-gradient(135deg,var(--navy),var(--blue));box-shadow:0 16px 32px -18px rgba(10,35,66,.8)}
.burger{display:none;width:46px;height:46px;place-items:center;background:#fff;border:1px solid rgba(228,233,239,.95);border-radius:14px;cursor:pointer;box-shadow:0 14px 28px -24px rgba(10,35,66,.7)}
.burger span{grid-area:1/1;width:22px;height:2.5px;background:var(--navy);border-radius:2px;transition:transform .28s,opacity .2s}
.burger span:nth-child(1){transform:translateY(-7px)}
.burger span:nth-child(3){transform:translateY(7px)}
.burger.open span:nth-child(1){transform:rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:rotate(-45deg)}

/* ---- section heads ---- */
section.block{padding:104px 0}
.head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:50px;flex-wrap:wrap}
.head h2{font-size:clamp(2rem,3.6vw,3rem)}
.head p{color:var(--muted);max-width:46ch;margin-top:14px}
.rule{width:64px;height:4px;background:var(--gold);margin-bottom:24px}

/* ---- trust strip ---- */
.trust{padding:60px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust .lab{text-align:center;font-family:'Archivo';font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-bottom:30px}
.trust .row{display:flex;justify-content:center;align-items:center;gap:54px;flex-wrap:wrap}
.trust .badge{display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--navy);opacity:.8}
.trust .badge svg{width:46px;height:46px;stroke:var(--navy);fill:none;stroke-width:1.5}
.trust .badge span{font-family:'Archivo';font-weight:700;font-size:13px;letter-spacing:.04em}

/* ---- CTA band ---- */
.cta{position:relative;color:#fff;overflow:hidden;padding:120px 0}
.cta .media{position:absolute;inset:0;z-index:0}
.cta .media img{width:100%;height:100%;object-fit:cover}
.cta .media::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(10,35,66,.94),rgba(10,35,66,.6))}
.cta .inner{position:relative;z-index:1;max-width:640px}
.cta h2{color:#fff;font-size:clamp(2rem,4vw,3.2rem);margin-bottom:18px}
.cta p{color:#dfe7f0;font-size:1.1rem;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---- footer ---- */
footer{background:var(--navy);color:#9fb3cc;padding:70px 0 30px}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;margin-bottom:46px}
footer .flogo{display:flex;align-items:center;gap:12px;margin-bottom:18px}
footer .flogo img{height:58px}
footer .flogo b{font-family:'Archivo';font-weight:800;color:#fff;font-size:18px;line-height:1.1}
footer p.desc{font-size:14px;max-width:30ch}
footer h5{font-family:'Archivo';color:#fff;font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:18px}
footer ul{list-style:none;display:flex;flex-direction:column;gap:11px}
footer ul a{font-size:14px;transition:color .2s}
footer ul a:hover{color:#fff}
.addr{font-size:14px;line-height:1.7}
.addr b{color:#fff;font-family:'Archivo'}
.footer-map-link{color:inherit;text-decoration:underline;text-underline-offset:3px}
.footer-plain-link{color:inherit}
.footer-gold-link{color:var(--gold)}
.socials{display:flex;gap:12px;margin-top:18px}
.socials a{width:38px;height:38px;border:1px solid rgba(255,255,255,.18);display:grid;place-items:center;border-radius:50%;transition:.2s;font-family:'Archivo';font-weight:700;font-size:13px}
.socials a:hover{background:var(--gold);border-color:var(--gold);color:#fff}
.fbot{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px}

/* ---- looping video backgrounds (additive — mirrors .media img sizing) ---- */
.media video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;pointer-events:none}
@media (prefers-reduced-motion:reduce){
  .media video{display:none}
}

/* ---- Ken Burns motion on hero photos (additive — doesn't touch sizing rules) ---- */
@keyframes kenBurns{
  0%   {transform:scale(1)    translate3d(0,0,0)}
  100% {transform:scale(1.12) translate3d(-1.6%,-1.6%,0)}
}
.pagehead .media img,
.hero .media img{
  animation:kenBurns 22s ease-in-out infinite alternate;
  will-change:transform;
  transform-origin:center;
}
@media (prefers-reduced-motion:reduce){
  .pagehead .media img,
  .hero .media img{animation:none}
}

/* ---- reveal-on-scroll utility ---- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

/* ---- responsive ---- */
@media(max-width:980px){
  .fgrid{grid-template-columns:1fr 1fr}
}
@media(max-width:1200px){
  header .bar{min-height:78px}
  header.scrolled .bar{min-height:70px}
  .logo-mark-wrap{width:58px;height:58px;border-radius:16px}
  .logo-mark-wrap::after{border-radius:12px}
  .logo .mark{height:50px}
  nav.menu{display:none;position:fixed;top:86px;left:auto;right:20px;width:min(430px,calc(100vw - 40px));max-height:calc(100dvh - 104px);overflow-y:auto;overscroll-behavior:contain;background:rgba(255,255,255,.98);flex-direction:column;align-items:stretch;gap:4px;padding:14px;border-radius:18px;transform:none;transform-origin:top right;opacity:1;visibility:hidden;pointer-events:none;border:1px solid rgba(228,233,239,.95);box-shadow:0 24px 70px -32px rgba(10,35,66,.55);z-index:70}
  header.scrolled nav.menu{top:70px}
  nav.menu.open,
  .menu.open{display:flex;visibility:visible !important;pointer-events:auto}
  #site-header #menu.open{display:flex;visibility:visible !important;pointer-events:auto}
  .menu-item{width:100%}
  .menu-item > a{padding:15px 14px;width:100%;min-height:48px;display:flex;align-items:center;justify-content:space-between;border-radius:12px}
  .menu-item.has-sub > a::before{display:none}
  .menu-item.has-sub > a::after{content:"+";position:static;background:none;width:auto;height:auto;font-size:18px;color:var(--muted);transition:transform .2s;font-family:'Archivo';font-weight:500;transform:none}
  .menu-item.has-sub.open > a::after{content:"-"}
  .submenu{position:static;opacity:1;visibility:visible;transform:none;border:0;box-shadow:none;margin:0 0 6px;padding:0;display:none;min-width:0;background:transparent;border-top:0;border-radius:0}
  .submenu::before,.submenu::after{display:none}
  .menu-item.has-sub.open > .submenu{display:flex !important;flex-direction:column;gap:4px;opacity:1 !important;visibility:visible !important;position:static !important;transform:none !important;background:#f5f7fa;border:1px solid var(--line);border-radius:12px;padding:6px}
  .submenu a{display:flex !important;padding:12px 14px;border-left:0;border-radius:9px;line-height:1.25;white-space:normal;color:var(--ink) !important;background:#fff}
  .submenu a:hover{background:rgba(31,111,194,.08);color:var(--blue) !important;transform:none}
  nav.menu .btn{margin-top:8px;justify-content:center;width:100%;min-height:48px}
  .burger{display:grid}
}
@media(max-width:560px){
  .wrap{padding:0 20px}
  .logo .nm{font-size:14px}
  .logo .tag{font-size:9.5px}
  .logo-mark-wrap{width:52px;height:52px}
  .logo .mark{height:45px}
  .burger{width:44px;height:44px}
  nav.menu{top:78px;left:12px;right:12px;width:auto;max-height:calc(100dvh - 92px);padding:10px;border-radius:16px}
  header.scrolled nav.menu{top:70px}
  .menu-item > a{padding:14px 12px}
}
@media(max-width:640px){
  .fgrid{grid-template-columns:1fr}
  section.block{padding:72px 0}
}