/* ════════════════════════════════════════════════════════
   MRDI — Master Research & Development Institute
   Shared Stylesheet — All Pages
   Background: #0a192f | Single-color MRDI branding
════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@300;400;500;600;700&family=Rajdhani:wght@400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:       #ffffff;
  --bg2:      #f7f8fa;
  --surface:  #ffffff;
  --surface2: #f1f4f7;
  --border:   rgba(16,36,71,0.1);
  --orange:   #ff7a1a;
  --orange2:  #ffac33;
  --text:     #4f6075;
  --text2:    #171f2b;
  --muted:    #66788f;
  --white:    #ffffff;
  --H: 'Oswald', sans-serif;
  --S: 'Rajdhani', sans-serif;
  --B: 'Inter', sans-serif;
}

html { scroll-behavior: smooth; }
body {
  background:
    radial-gradient(circle at top left, rgba(255,172,51,.08) 0%, transparent 18%),
    radial-gradient(circle at top right, rgba(96,180,255,.08) 0%, transparent 20%),
    linear-gradient(180deg, #ffffff 0%, #fafbfd 55%, #f4f6f8 100%);
  color: var(--text);
  font-family: var(--B);
  font-size: 16px;
  overflow-x: hidden;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img  { max-width: 100%; display: block; object-fit: cover; }
a    { color: inherit; text-decoration: none; }
ul   { list-style: none; }

/* ── GRAIN ─────────────────────────────────────────────── */
body::after {
  content: '';
  position: fixed; inset: 0; z-index: 9000;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none; opacity: .18;
}

/* ════════════════════════════════
   TOPBAR
════════════════════════════════ */
.topbar {
  background: linear-gradient(90deg, #ff7a1a 0%, #ffb347 100%);
  text-align: center;
  padding: 9px 24px;
  font-family: var(--S);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .3px;
  color: #fff;
  position: relative; z-index: 200;
}
.topbar a { color: #fff; border-bottom: 1px solid rgba(255,255,255,.4); }

/* ════════════════════════════════
   HEADER
════════════════════════════════ */
header {
  position: sticky; top: 0; z-index: 100;
  background: #ffffff;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background .3s;
  box-shadow: 0 10px 24px rgba(23,31,43,.05);
}
.header-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px; height: 70px;
}
.logo {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none;
}
.logo img { height: 46px; width: auto; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-name {
  font-family: var(--H);
  font-size: 1.02rem; font-weight: 700;
  letter-spacing: 1.2px; color: var(--text2);
  text-transform: uppercase;
}
.logo-tag {
  font-family: var(--S);
  font-size: .68rem; letter-spacing: 1px;
  color: var(--muted); text-transform: uppercase;
}

/* NAV */
nav {
  display: flex; align-items: center; gap: 2px;
}
.nav-item { position: relative; }
.nav-item > a {
  display: block;
  padding: 8px 13px;
  font-family: var(--S);
  font-size: .9rem; font-weight: 600;
  letter-spacing: .3px; text-transform: uppercase;
  color: #48688f;
  transition: color .2s, background .2s;
  white-space: nowrap;
  border-radius: 999px;
}
.nav-item > a:hover,
.nav-item > a.active { color: var(--orange); background: rgba(255,122,26,.08); }
.nav-item:hover .dropdown { display: block; }

.dropdown {
  display: none;
  position: absolute; top: 100%; left: 0;
  min-width: 210px;
  background: rgba(255,255,255,1);
  border: 1px solid var(--border);
  border-top: 2px solid var(--orange);
  z-index: 500;
  box-shadow: 0 20px 40px rgba(16,36,71,.12);
}
.dropdown a {
  display: block; padding: 11px 20px;
  font-family: var(--S);
  font-size: .88rem; font-weight: 500;
  letter-spacing: .2px; color: #56779d;
  border-bottom: 1px solid var(--border);
  transition: color .2s, padding-left .2s, background .2s;
}
.dropdown a:last-child { border-bottom: none; }
.dropdown a:hover { color: var(--orange); padding-left: 28px; background: #fff7ef; }

.nav-cta {
  margin-left: 10px;
  padding: 9px 22px;
  background: var(--orange);
  color: #fff !important;
  font-family: var(--S);
  font-size: .9rem; font-weight: 700;
  letter-spacing: .5px; text-transform: uppercase;
  border: 2px solid var(--orange);
  transition: background .2s, transform .2s, box-shadow .2s;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(255,122,26,.24);
}
.nav-cta:hover {
  background: var(--orange2);
  border-color: var(--orange2);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(232,93,4,.3);
}

/* hamburger */
.hamburger {
  display: none; flex-direction: column;
  gap: 5px; cursor: pointer; padding: 8px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text2); border-radius: 1px;
  transition: .3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ════════════════════════════════
   PAGE HERO (inner pages)
════════════════════════════════ */
.page-hero {
  background:
    radial-gradient(circle at top right, rgba(255,172,51,.12) 0%, transparent 22%),
    radial-gradient(circle at top left, rgba(96,180,255,.1) 0%, transparent 24%),
    linear-gradient(180deg, #ffffff 0%, #f7f8fa 100%);
  border-bottom: 1px solid var(--border);
  padding: 80px 40px 60px;
  text-align: center;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; top: -80px; right: -80px;
  width: 400px; height: 400px;
  border: 1px solid rgba(232,93,4,.08);
  border-radius: 50%;
  pointer-events: none;
}
.page-hero::after {
  content: '';
  position: absolute; bottom: -60px; left: -60px;
  width: 300px; height: 300px;
  border: 1px solid rgba(100,140,200,.06);
  border-radius: 50%;
  pointer-events: none; z-index: 0;
}
.page-hero-inner { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.breadcrumb {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; margin-bottom: 20px;
  font-family: var(--S);
  font-size: .78rem; letter-spacing: .8px;
  text-transform: uppercase; color: var(--muted);
}
.breadcrumb a { color: var(--orange); }
.breadcrumb span { color: var(--border); }
.page-title {
  font-family: var(--H);
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 700; text-transform: uppercase;
  color: var(--text2); line-height: 1.08;
  margin-bottom: 16px;
}
.page-subtitle {
  font-family: var(--S);
  font-size: 1.08rem; color: var(--muted);
  max-width: 560px; margin: 0 auto;
  line-height: 1.75;
}

/* ════════════════════════════════
   SHARED LAYOUT
════════════════════════════════ */
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 40px; }
.section-pad { padding: 90px 0; }

.sec-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--S);
  font-size: .78rem; font-weight: 700;
  letter-spacing: 1.4px; text-transform: uppercase;
  color: var(--orange); margin-bottom: 14px;
}
.sec-label::before {
  content: ''; display: block;
  width: 28px; height: 2px; background: var(--orange);
}
.sec-title {
  font-family: var(--H);
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 700; text-transform: uppercase;
  line-height: 1.12; color: var(--text2);
  margin-bottom: 14px;
}
.sec-desc {
  font-size: 1rem; color: var(--muted);
  line-height: 1.8; max-width: 620px;
}

/* ════════════════════════════════
   BUTTONS
════════════════════════════════ */
.btn-orange {
  display: inline-block;
  padding: 13px 34px;
  background: linear-gradient(135deg, var(--orange) 0%, var(--orange2) 100%);
  color: #fff;
  font-family: var(--S);
  font-size: .92rem; font-weight: 700;
  letter-spacing: .6px; text-transform: uppercase;
  border: 2px solid var(--orange);
  transition: background .25s, transform .25s, box-shadow .25s;
  cursor: pointer;
  box-shadow: 0 12px 34px rgba(255,122,26,.24);
}
.btn-orange:hover {
  background: linear-gradient(135deg, var(--orange2) 0%, #ffd166 100%); border-color: var(--orange2);
  box-shadow: 0 14px 38px rgba(255,122,26,.34);
  transform: translateY(-2px);
}
.btn-outline {
  display: inline-block;
  padding: 13px 34px;
  background: rgba(255,255,255,.88);
  color: var(--text2);
  font-family: var(--S);
  font-size: .92rem; font-weight: 700;
  letter-spacing: .6px; text-transform: uppercase;
  border: 2px solid rgba(204,214,246,.25);
  transition: border-color .25s, color .25s, background .25s;
  cursor: pointer;
}
.btn-outline:hover { border-color: rgba(255,172,51,.7); color: var(--text2); background: #fff7ef; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--S);
  font-size: .86rem; font-weight: 700;
  letter-spacing: .8px; text-transform: uppercase;
  color: var(--orange);
  border-bottom: 1px solid rgba(232,93,4,.3);
  padding-bottom: 2px;
  transition: gap .2s, border-color .2s;
}
.btn-ghost:hover { gap: 14px; border-color: var(--orange); }

/* ════════════════════════════════
   MARQUEE
════════════════════════════════ */
.marquee-wrap {
  overflow: hidden;
  background: linear-gradient(90deg, #fbfbfc 0%, #f2f5f8 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 17px 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8), inset 0 -1px 0 rgba(16,36,71,.04);
}
.marquee-track {
  display: flex; width: max-content;
  animation: marqueeScroll 28s linear infinite;
}
.marquee-item {
  display: flex; align-items: center; gap: 14px;
  padding: 0 32px;
  font-family: var(--H);
  font-size: .92rem; font-weight: 500;
  letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--muted); white-space: nowrap;
  border-right: 1px solid var(--border);
}
.marquee-dot { color: var(--orange); font-size: .45rem; }
@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ════════════════════════════════
   CARDS — VIDEO
════════════════════════════════ */
.video-card {
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform .3s, border-color .3s, box-shadow .3s, background .3s;
  cursor: pointer;
  box-shadow: 0 16px 30px rgba(16,36,71,.08);
}
.video-card:hover { transform: translateY(-5px); border-color: rgba(255,122,26,.35); box-shadow: 0 20px 36px rgba(23,31,43,.1); background: #fffaf6; }
.video-thumb {
  position: relative; width: 100%; height: 200px;
  background: var(--bg2);
  overflow: hidden;
}
.video-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  filter: brightness(.8);
  transition: transform .5s, filter .5s;
}
.video-card:hover .video-thumb img { transform: scale(1.05); filter: brightness(.95); }
.video-play {
  position: absolute; top: 16px; right: 16px;
  transform: translateY(-6px);
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.92);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--S);
  font-size: .74rem; font-weight: 700;
  letter-spacing: .8px; text-transform: uppercase;
  color: var(--text2);
  opacity: 0;
  transition: background .3s, transform .3s, border-color .3s, opacity .3s;
}
.video-card:hover .video-play {
  opacity: 1;
  background: rgba(232,93,4,.14);
  border-color: rgba(232,93,4,.5);
  transform: translateY(0);
}
.video-body { padding: 22px 24px 26px; }
.video-tag {
  display: inline-block;
  font-family: var(--S);
  font-size: .72rem; font-weight: 700;
  letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--orange);
  border: 1px solid rgba(232,93,4,.3);
  padding: 2px 9px; margin-bottom: 10px;
}
.video-body h3 {
  font-family: var(--H);
  font-size: 1.08rem; font-weight: 600;
  text-transform: uppercase; color: var(--text2);
  margin-bottom: 8px; line-height: 1.2;
}
.video-body p { font-size: .95rem; color: var(--muted); line-height: 1.75; }

/* ════════════════════════════════
   REVEAL ANIMATION
════════════════════════════════ */
.reveal {
  opacity: 0; transform: translateY(36px);
  transition: opacity .75s ease, transform .75s ease;
}
.reveal.in { opacity: 1; transform: none; }
.rd1 { transition-delay: .1s; }
.rd2 { transition-delay: .2s; }
.rd3 { transition-delay: .3s; }
.rd4 { transition-delay: .4s; }
.rd5 { transition-delay: .5s; }

/* ════════════════════════════════
   FOOTER
════════════════════════════════ */
footer {
  background: linear-gradient(180deg, #ffffff 0%, #f6f7f9 100%);
  border-top: 1px solid var(--border);
  position: relative; z-index: 1;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 56px;
  max-width: 1280px; margin: 0 auto;
  padding: 72px 40px 52px;
}
.footer-brand p {
  font-size: .95rem; color: #55697f;
  line-height: 1.8; max-width: 270px;
  margin: 16px 0 24px;
}
.footer-socials { display: flex; gap: 12px; flex-wrap: wrap; }
.footer-socials a {
  width: 42px; height: 42px;
  border: 1px solid rgba(16,36,71,.14);
  border-radius: 999px;
  background: #ffffff;
  box-shadow: 0 10px 20px rgba(16,36,71,.05);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--S);
  font-size: .78rem; font-weight: 700; letter-spacing: .5px; text-transform: uppercase;
  color: #304965;
  transition: border-color .2s, color .2s, background .2s, transform .2s, box-shadow .2s;
}
.footer-socials a:hover { border-color: rgba(232,93,4,.28); color: var(--orange); background: #fff6ee; box-shadow: 0 14px 24px rgba(232,93,4,.12); transform: translateY(-1px); }
.footer-socials a svg { width: 18px; height: 18px; display: block; }
.footer-col h4 {
  font-family: var(--H);
  font-size: .9rem; font-weight: 600;
  letter-spacing: .9px; text-transform: uppercase;
  color: var(--text2); margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.footer-col li { margin-bottom: 10px; }
.footer-col li a {
  font-size: .92rem; color: #55697f;
  display: flex; align-items: center; gap: 7px;
  transition: color .2s, gap .2s;
}
.footer-col li a::before { content: '›'; color: var(--orange); }
.footer-col li a:hover { color: var(--orange); gap: 12px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  max-width: 1280px; margin: 0 auto;
  padding: 20px 40px;
  display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 10px;
}
.footer-bottom p { font-size: .84rem; color: #5b7088; }
.footer-bottom a { color: var(--orange); }

/* ════════════════════════════════
   WHATSAPP FLOAT
════════════════════════════════ */
.wa-float {
  position: fixed; bottom: 28px; right: 28px; z-index: 8000;
  width: 54px; height: 54px;
  background: #25d366; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 6px 24px rgba(37,211,102,.4);
  transition: transform .3s;
  animation: waPulse 2.5s ease-in-out infinite;
}
.wa-float:hover { transform: scale(1.1); }
@keyframes waPulse {
  0%,100% { box-shadow: 0 6px 24px rgba(37,211,102,.35); }
  50%      { box-shadow: 0 6px 40px rgba(37,211,102,.6); }
}

/* ════════════════════════════════
   FORMS
════════════════════════════════ */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-family: var(--S);
  font-size: .78rem; font-weight: 600;
  letter-spacing: 1px; text-transform: uppercase;
  color: var(--muted); margin-bottom: 8px;
}
.form-group label span { color: var(--orange); }
.form-control {
  width: 100%; padding: 13px 16px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text2);
  font-family: var(--B); font-size: .92rem;
  outline: none;
  transition: border-color .2s;
  -webkit-appearance: none;
}
.form-control:focus { border-color: var(--orange); }
.form-control::placeholder { color: var(--muted); opacity: .7; }
select.form-control { cursor: pointer; }

/* ════════════════════════════════
   UTILITY
════════════════════════════════ */
.text-orange { color: var(--orange); }
.text-center { text-align: center; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mt-64 { margin-top: 64px; }
.divider {
  width: 100%; height: 1px;
  background: var(--border);
  margin: 64px 0;
}

/* ════════════════════════════════
   FEATURE LIST
════════════════════════════════ */
.feature-list { margin-top: 28px; }
.feature-list li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--S);
  font-size: .92rem; font-weight: 500;
  color: var(--text);
  line-height: 1.5;
}
.feature-list li::before {
  content: '▸'; color: var(--orange);
  flex-shrink: 0; margin-top: 1px;
}

/* ════════════════════════════════
   RESPONSIVE
════════════════════════════════ */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 768px) {
  .topbar {
    padding: 10px 16px;
    font-size: .78rem;
    line-height: 1.5;
  }
  .header-inner { padding: 0 20px; }
  .logo img { height: 40px; }
  .logo-name { font-size: .94rem; letter-spacing: .8px; }
  .logo-tag { font-size: .62rem; letter-spacing: .6px; }
  nav { display: none; flex-direction: column; position: absolute;
        top: 70px; left: 0; right: 0;
        background: #ffffff; padding: 12px 0 20px;
        border-bottom: 1px solid var(--border); z-index: 99;
        max-height: calc(100vh - 70px); overflow-y: auto; }
  nav.open { display: flex; }
  .nav-item { width: 100%; }
  .nav-item > a { padding: 12px 24px; font-size: .98rem; }
  .dropdown { position: static; border: none; padding-left: 20px;
              display: none !important; }
  .nav-cta { margin: 12px 20px 0; width: calc(100% - 40px); text-align: center; }
  .hamburger { display: flex; }
  .wrap { padding: 0 20px; }
  .section-pad { padding: 64px 0; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; padding: 48px 20px 36px; }
  .footer-bottom { padding: 16px 20px; flex-direction: column; text-align: center; }
  .page-hero { padding: 60px 20px 48px; }
  .footer-links { gap: 12px; justify-content: center; }
  .breadcrumb { flex-wrap: wrap; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .page-hero { padding: 52px 16px 40px; }
  .page-title { line-height: 1.05; }
  .page-subtitle { font-size: 1rem; }
  .btn-orange,
  .btn-outline,
  .btn-ghost {
    width: 100%;
    max-width: 100%;
    justify-content: center;
    text-align: center;
  }
  .video-thumb { height: 180px; }
}
@media (max-width: 480px) {
  .topbar {
    padding: 9px 12px;
    font-size: .72rem;
  }
  .header-inner { height: 62px; padding: 0 16px; }
  .logo { gap: 10px; }
  .logo img { height: 36px; }
  .logo-name { font-size: .88rem; letter-spacing: .5px; }
  .logo-tag { display: none; }
  nav { top: 62px; max-height: calc(100vh - 62px); }
  .nav-item > a { padding: 11px 18px; font-size: .94rem; }
  .nav-cta { width: calc(100% - 32px); margin: 12px 16px 0; }
  .page-title { font-size: clamp(1.9rem, 11vw, 2.8rem); }
  .video-thumb { height: 168px; }
}