/* =====================================================
   VITARAI — Design System
   ===================================================== */

:root {
  --navy:        #1B2340;
  --navy-mid:    #232d50;
  --navy-light:  #2d3a66;
  --teal:        #4DB6AC;
  --teal-bright: #63cfc4;
  --hero-bg:     #0F1628;

  --white:       #FFFFFF;
  --off-white:   #F7F8FA;
  --gray-100:    #EEF0F5;
  --gray-300:    #C5C9D6;
  --gray-500:    #7A80A0;
  --gray-700:    #3D4461;
  --dark-text:   #C8CEDE;

  --glow-teal:   0 0 40px rgba(77,182,172,0.18);

  --radius:      12px;
  --radius-lg:   20px;
  --transition:  0.28s cubic-bezier(0.4, 0, 0.2, 1);

  --max-w:       1140px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', sans-serif;
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ── Utilities ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }
.section    { padding: 6rem 0; }

.label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
  display: block;
}

.heading {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.12;
  margin-bottom: 1.25rem;
}
.heading--lg  { font-size: clamp(2.2rem, 5vw, 3.8rem); }
.heading--md  { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.heading--sm  { font-size: 1.25rem; }
.heading--light { color: var(--white); }
.heading--dark  { color: var(--navy); }

.subtext       { font-size: 1.05rem; line-height: 1.7; color: var(--gray-500); }
.subtext--light { color: var(--dark-text); opacity: 0.8; }
.teal          { color: var(--teal); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600; font-size: 0.95rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer; border: none;
}
.btn-primary {
  background: var(--teal); color: var(--navy);
}
.btn-primary:hover { background: var(--teal-bright); transform: translateY(-2px); box-shadow: var(--glow-teal); }

.btn-outline {
  background: transparent; color: var(--teal);
  border: 2px solid var(--teal);
  padding: calc(0.85rem - 2px) calc(2rem - 2px);
}
.btn-outline:hover { background: rgba(77,182,172,0.1); transform: translateY(-2px); }

/* Scroll reveal — only hide when JS has loaded (js-ready class on body) */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.js-ready .reveal.visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }


/* =====================================================
   NAV
   ===================================================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1001;
  padding: 1.25rem 0;
  transition: background 0.35s, box-shadow 0.35s, padding 0.35s;
}
.nav--scrolled {
  background: rgba(15,22,40,0.96);
  backdrop-filter: blur(16px);
  box-shadow: 0 2px 32px rgba(0,0,0,0.35);
  padding: 0.85rem 0;
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo {
  display: flex; align-items: center; gap: 0.6rem;
}
.nav__logo img {
  height: 32px; width: auto;
}
.nav__logo-text {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 1.2rem;
  color: var(--white);
  letter-spacing: -0.01em;
}
.nav__links {
  display: flex; align-items: center; gap: 2rem;
  list-style: none;
}
.nav__links a {
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem; color: rgba(255,255,255,0.75);
  transition: color var(--transition);
}
.nav__links a:hover,
.nav__links a.active { color: var(--white); }
.nav__links .nav__cta { margin-left: 0.5rem; }

.nav__hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav__hamburger span {
  display: block; width: 24px; height: 2px;
  background: white; border-radius: 2px;
  transition: var(--transition);
}
.nav__hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }


/* =====================================================
   HERO
   ===================================================== */
.hero {
  position: relative;
  background: var(--hero-bg);
  min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
}
#hero-canvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 999;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 40% 40% at center, transparent 0%, black 100%);
  mask-image: radial-gradient(ellipse 40% 40% at center, transparent 0%, black 100%);
}
.hero__mri {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  mix-blend-mode: lighten;
  opacity: 0.4;
  pointer-events: none;
  z-index: 1000;
}
.hero__content {
  position: relative; z-index: 1001;
  text-align: center;
  padding: 8rem 0 5rem;
  width: 100%;
}
.hero__badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(77,182,172,0.1);
  border: 1px solid rgba(77,182,172,0.3);
  color: var(--teal);
  padding: 0.45rem 1rem;
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem; letter-spacing: 0.08em;
  margin-bottom: 2rem;
}
.hero__badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--teal);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.85); }
}
.hero__title {
  color: var(--white);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}
.hero__title .teal {
  text-shadow: 0 0 60px rgba(77,182,172,0.35);
}
.hero__sub {
  max-width: 520px; margin: 0 auto 2.5rem;
}
.hero__ctas {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
  margin-bottom: 4rem;
}


/* =====================================================
   PROBLEM
   ===================================================== */
.problem { background: var(--navy); }
.problem__inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 5rem; align-items: center;
}
.problem__quote {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600; color: var(--white);
  line-height: 1.4;
  border-left: 3px solid var(--teal);
  padding-left: 1.5rem;
  margin-top: 1.5rem;
}
.problem__points { list-style: none; margin-top: 2rem; }
.problem__points li {
  display: flex; gap: 0.85rem; align-items: flex-start;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  color: var(--dark-text); font-size: 0.95rem;
}
.problem__points li:last-child { border-bottom: none; }
.problem__points .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--teal); flex-shrink: 0; margin-top: 0.45rem;
}


/* =====================================================
   APPROACH
   ===================================================== */
.approach { background: var(--off-white); }
.approach__intro { text-align: center; margin-bottom: 3.5rem; }
.approach__intro .subtext { max-width: 500px; margin: 0 auto; }

.approach__grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem;
}
.approach-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative; overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.approach-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--teal-bright));
}
.approach-card:hover {
  transform: translateY(-5px);
  border-color: var(--teal);
  box-shadow: 0 14px 40px rgba(0,0,0,0.09);
}
.approach-card__num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; color: var(--teal);
  letter-spacing: 0.15em; margin-bottom: 1.25rem;
}
.approach-card__title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem; font-weight: 700;
  color: var(--navy); margin-bottom: 0.75rem;
}
.approach-card__body {
  font-size: 0.9rem; line-height: 1.65; color: var(--gray-700);
  margin-bottom: 1.25rem;
}
.approach-card__tags {
  display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none;
}
.approach-card__tags li {
  background: var(--gray-100); color: var(--gray-500);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; padding: 3px 9px; border-radius: 100px;
}


/* =====================================================
   TEAM
   ===================================================== */
.team { background: var(--white); }
.team__intro { text-align: center; margin-bottom: 3.5rem; }

.team__grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem;
}
.team-card {
  text-align: center;
  padding: 1.75rem 1.25rem;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.team-card:hover {
  border-color: rgba(77,182,172,0.4);
  transform: translateY(-4px);
  box-shadow: 0 10px 32px rgba(0,0,0,0.07);
}
.avatar {
  width: 88px; height: 88px; border-radius: 50%;
  margin: 0 auto 1.1rem;
  object-fit: cover;
  border: 2.5px solid var(--teal);
  box-shadow: 0 0 0 5px rgba(77,182,172,0.1);
}
.avatar-fallback {
  width: 88px; height: 88px; border-radius: 50%;
  margin: 0 auto 1.1rem;
  background: var(--navy);
  border: 2.5px solid var(--teal);
  box-shadow: 0 0 0 5px rgba(77,182,172,0.1);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 1.1rem; color: var(--white);
  letter-spacing: 0.05em;
}
.team-card__name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 0.95rem;
  color: var(--navy); margin-bottom: 0.25rem;
}
.team-card__cred {
  font-size: 0.8rem; color: var(--gray-500); line-height: 1.4;
}

/* Advisors */
.advisors { margin-top: 4rem; }
.advisors__label {
  text-align: center; margin-bottom: 2rem;
}
.advisors__label .label { justify-content: center; display: flex; }
.advisors__grid {
  display: grid; grid-template-columns: repeat(2,1fr);
  gap: 1.25rem; max-width: 640px; margin: 0 auto;
}
.advisor-card {
  display: flex; gap: 1.25rem; align-items: center;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}
.advisor-card:hover { border-color: rgba(77,182,172,0.35); }
.advisor-card .avatar,
.advisor-card .avatar-fallback {
  width: 56px; height: 56px; font-size: 0.85rem; flex-shrink: 0;
  margin: 0;
}
.avatar-link {
  display: block; border-radius: 50%;
  transition: opacity var(--transition);
}
.avatar-link:hover { opacity: 0.85; }

.linkedin-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  margin-top: 0.65rem;
  font-size: 0.75rem; color: var(--teal);
  font-family: 'JetBrains Mono', monospace;
  transition: opacity var(--transition);
}
.linkedin-link:hover { opacity: 0.75; }

.advisor-card__name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 0.95rem;
  color: var(--navy); margin-bottom: 0.2rem;
}
.advisor-card__title { font-size: 0.8rem; color: var(--gray-500); line-height: 1.4; }


/* =====================================================
   CONTACT
   ===================================================== */
.contact { background: var(--hero-bg); text-align: center; }
.contact__inner { max-width: 560px; margin: 0 auto; }
.contact__inner .heading { margin-bottom: 1rem; }
.contact__inner .subtext { margin-bottom: 2.5rem; }
.contact__email {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(77,182,172,0.1);
  border: 1px solid rgba(77,182,172,0.3);
  color: var(--teal);
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
  user-select: text;
  -webkit-user-select: text;
}
.contact__email:hover {
  background: rgba(77,182,172,0.18);
  transform: translateY(-2px);
}


/* =====================================================
   FOOTER
   ===================================================== */
.footer {
  position: relative; z-index: 1000;
  background: var(--navy);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 2rem 0;
}
.footer__inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 0.75rem;
}
.footer__brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 1rem; color: var(--white);
}
.footer__tagline { font-size: 0.85rem; color: var(--gray-500); }
.footer__copy    { font-size: 0.8rem; color: var(--gray-500); }


/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1024px) {
  .approach__grid { grid-template-columns: repeat(2,1fr); }
  .team__grid     { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  .section { padding: 4rem 0; }

  /* Nav mobile */
  .nav__hamburger { display: flex; }
  .nav__links {
    position: fixed; top: 0; right: -100%; width: 80%; max-width: 300px;
    height: 100vh; background: var(--navy);
    flex-direction: column; align-items: flex-start;
    padding: 5rem 2rem 2rem;
    gap: 0; transition: right 0.35s cubic-bezier(0.4,0,0.2,1);
    border-left: 1px solid var(--navy-light);
    z-index: 999;
  }
  .nav__links--open { right: 0; }
  .nav__links li { width: 100%; border-bottom: 1px solid var(--navy-light); }
  .nav__links a   { display: block; padding: 1rem 0; font-size: 1.05rem; }
  .nav__links .nav__cta { margin: 1rem 0 0; }
  .no-scroll { overflow: hidden; }

  /* Problem */
  .problem__inner { grid-template-columns: 1fr; gap: 2.5rem; }

  /* Approach */
  .approach__grid { grid-template-columns: 1fr; }

  /* Team */
  .team__grid     { grid-template-columns: repeat(2,1fr); }
  .advisors__grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .team__grid { grid-template-columns: 1fr; }
  .hero__ctas { flex-direction: column; align-items: center; }
}