/* ======================================================
   Vedha Studios — R&D Research Page
   Matches YOUR HTML exactly
====================================================== */

:root{
  --bg0: #05070b;
  --bg1: #070c14;
  --panel: rgba(255,255,255,0.05);
  --panel2: rgba(255,255,255,0.075);
  --border: rgba(255,255,255,0.12);
  --border2: rgba(255,255,255,0.18);
  --text: #ffffff;
  --muted: rgba(255,255,255,0.72);
  --dim: rgba(255,255,255,0.55);

  --accent: #7dd3fc;   /* scientific blue */
  --accent2:#a78bfa;   /* violet */

  --radius: 16px;
  --blur: blur(12px);
}

/* Base */
*{ box-sizing: border-box; }
html, body{ height: auto; }

body.rnd{
  margin: 0;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg0), var(--bg1));
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  overflow-x: hidden;
}

/* Links default */
a{ color: inherit; text-decoration: none; }
a:focus-visible{
  outline: 2px solid rgba(125,211,252,0.55);
  outline-offset: 3px;
  border-radius: 10px;
}

/* ======================================================
   BACKGROUND (CSS-only)
====================================================== */
.bg-science{
  position: fixed;
  inset: 0;
  z-index: -10;
  overflow: hidden;
  pointer-events: none;
}

.bg-grid{
  position: absolute;
  inset: -20%;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.10;
  transform: perspective(900px) rotateX(58deg) translateY(-18%);
  transform-origin: top;
}

.bg-glow{
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 600px at 15% 15%, rgba(125,211,252,0.14), transparent 60%),
    radial-gradient(800px 520px at 85% 20%, rgba(167,139,250,0.12), transparent 60%),
    radial-gradient(900px 700px at 55% 90%, rgba(255,255,255,0.06), transparent 65%);
  filter: blur(0px);
}

.bg-noise{
  position: absolute;
  inset: 0;
  opacity: 0.07;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  animation: noiseMove 9s linear infinite;
}

@keyframes noiseMove{
  0%{ transform: translate3d(0,0,0); }
  50%{ transform: translate3d(-2%, 1%, 0); }
  100%{ transform: translate3d(0,0,0); }
}

/* ======================================================
   TOPBAR
====================================================== */
.topbar{
  position: fixed;
  top: 18px;
  left: 0;
  right: 0;
  z-index: 50;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 10px 14px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;

  border-radius: 999px;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.10);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

.brand img{
  width: 132px;
  height: auto;
  display: block;
}

/* Desktop nav */
.nav{
  display: flex;
  gap: 18px;
  align-items: center;
}

.nav a{
  color: rgba(255,255,255,0.78);
  font-size: 0.95rem;
  transition: color 180ms ease;
}

.nav a:hover{ color: rgba(255,255,255,1); }

/* Mobile button */
.nav-toggle{
  display: none;
  border: 0;
  background: transparent;
  color: rgba(255,255,255,0.92);
  font-size: 1.9rem;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 12px;
}

.nav-toggle:hover{
  background: rgba(255,255,255,0.06);
}

/* Mobile nav panel */
.nav-panel{
  position: fixed;
  top: 74px;
  right: 24px;
  width: min(340px, calc(100% - 48px));
  z-index: 60;

  display: none;
  flex-direction: column;
  gap: 10px;

  padding: 14px;
  border-radius: 16px;
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: var(--blur);
}

.nav-panel a{
  padding: 12px 12px;
  border-radius: 12px;
  color: rgba(255,255,255,0.86);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
}

.nav-panel a:hover{
  background: rgba(255,255,255,0.07);
}

.nav-panel.open{
  display: flex;
}

/* ======================================================
   LAYOUT CONTAINER
====================================================== */
.container{
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 140px 0 80px;
}

/* ======================================================
   HERO
====================================================== */
.hero{
  margin: 0 auto 34px;
  padding: 28px 0 10px;
  max-width: 980px;
}

.kicker{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.70);
  margin: 0 0 14px;
}

.kicker::before{
  content:"";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 20px rgba(125,211,252,0.25);
}

.hero h1{
  margin: 0 0 12px;
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  line-height: 1.08;
  font-weight: 850;
  letter-spacing: 0.01em;
}

.sub{
  margin: 0;
  max-width: 860px;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.75;
}

/* hero meta cards */
.hero-meta{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
  max-width: 980px;
}

.meta-card{
  border-radius: var(--radius);
  padding: 14px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
}

.meta-title{
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.58);
}

.meta-value{
  margin-top: 8px;
  font-weight: 650;
  color: rgba(255,255,255,0.88);
}

/* chips */
.chips{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.chip{
  font-size: 0.82rem;
  color: rgba(255,255,255,0.74);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  padding: 8px 12px;
  border-radius: 999px;
}

/* ======================================================
   SECTION HEADER
====================================================== */
.section{
  margin-top: 30px;
}

.section-head{
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
  padding-top: 10px;
}

.section-head h2{
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-head p{
  margin: 0;
  max-width: 640px;
  color: var(--dim);
  line-height: 1.6;
}

/* ======================================================
   CARDS GRID
====================================================== */
.cards{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card{
  position: relative;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 200ms ease, background 200ms ease, border-color 200ms ease;
}

.card::before{
  content:"";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms ease;
  background:
    radial-gradient(700px 240px at 20% 0%, rgba(125,211,252,0.14), transparent 60%),
    radial-gradient(700px 240px at 80% 0%, rgba(167,139,250,0.12), transparent 60%);
}

.card:hover{
  transform: translateY(-4px);
  background: var(--panel2);
  border-color: var(--border2);
}

.card:hover::before{ opacity: 1; }

.card-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.icon{
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
}

.icon svg{
  width: 22px;
  height: 22px;
  fill: rgba(255,255,255,0.82);
}

.badge{
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.72);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  padding: 7px 10px;
  border-radius: 999px;
}

.card h3{
  margin: 0 0 10px;
  font-size: 1.12rem;
  line-height: 1.35;
}

.card h3 a{
  text-decoration: none;
  color: rgba(255,255,255,0.92);
}

.card h3 a:hover{
  text-decoration: underline;
  text-underline-offset: 5px;
}

.card p{
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  font-size: 0.98rem;
}

.tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tags span{
  font-size: 0.75rem;
  color: rgba(255,255,255,0.70);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  padding: 6px 10px;
  border-radius: 999px;
}

.card-foot{
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.62);
  font-size: 0.92rem;
}

.arrow{
  color: var(--accent);
  font-size: 1.15rem;
  transition: transform 200ms ease;
}

.card:hover .arrow{
  transform: translateX(6px);
}

/* Make the whole card clickable feel */
.card{
  padding: 18px 18px 16px;
}

/* ======================================================
   CTA
====================================================== */
.cta{
  margin-top: 22px;
}

.cta-inner{
  border-radius: 18px;
  padding: 22px 18px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  text-align: center;
}

.cta-inner h2{
  margin: 0 0 10px;
  font-size: 1.35rem;
}

.cta-inner p{
  margin: 0 auto 14px;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.7;
}

.cta-btn{
  display: inline-block;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(125,211,252,0.45);
  background: rgba(125,211,252,0.10);
  color: rgba(255,255,255,0.92);
  transition: transform 180ms ease, background 180ms ease;
}

.cta-btn:hover{
  transform: translateY(-2px);
  background: rgba(125,211,252,0.16);
}

/* ======================================================
   FOOTER
====================================================== */
.footer{
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.55);
  text-align: center;
}

.footer-row{
  margin: 6px 0;
}

.footer a{
  color: rgba(255,255,255,0.80);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ======================================================
   RESPONSIVE
====================================================== */
@media (max-width: 980px){
  .container{ width: calc(100% - 48px); }
  .section-head{ flex-direction: column; align-items: flex-start; }
}

@media (max-width: 900px){
  .nav{ display: none; }
  .nav-toggle{ display: inline-flex; }

  .hero-meta{ grid-template-columns: 1fr; }
  .cards{ grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce){
  .bg-noise{ animation: none; }
  .card, .card::before, .arrow, .cta-btn{
    transition: none !important;
  }
}