/* ============================================================
   SRINIVASALU IFS — Shared Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,600;14..32,700&family=Playfair+Display:wght@400;600;700;800&display=swap');

:root {
  --teal-deep: #0F4C5C;
  --teal-mid: #1E7F6E;
  --sand: #F4E4C1;
  --terracotta: #D97A5C;
  --slate: #2D3A4B;
  --slate-light: #4A5B6E;
  --cream: #FFFDF7;
  --charcoal: #1A1F2C;
  --white: #FFFFFF;
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 40px -10px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 80px;
  --radius-btn: 40px;
  --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--cream);
  color: var(--slate);
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: 'Playfair Display', serif;
  line-height: 1.25;
  color: var(--charcoal);
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---- Page Loader ---- */
#page-loader {
  position: fixed; inset: 0;
  background: var(--cream);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}
#page-loader.hidden { opacity: 0; pointer-events: none; }
.loader-dot {
  width: 12px; height: 12px;
  background: var(--teal-deep);
  border-radius: 50%;
  margin: 0 5px;
  animation: bounce 0.8s ease-in-out infinite alternate;
}
.loader-dot:nth-child(2) { animation-delay: 0.2s; }
.loader-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce { from { transform: translateY(0); } to { transform: translateY(-14px); } }

/* ---- Navigation ---- */
.nav-wrapper {
  position: fixed;
  top: 1.5rem; left: 5vw; right: 5vw;
  z-index: 1000;
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-pill);
  padding: 0.75rem 1.75rem;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255,255,255,0.6);
}
.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--teal-deep);
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--slate);
  padding: 0.4rem 0.75rem;
  border-radius: 30px;
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  background: var(--teal-deep);
  color: var(--white);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--slate);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile Overlay Menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--teal-deep);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: 'Playfair Display', serif;
  font-size: 1.8rem;
  color: var(--white);
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--sand); }
.mobile-close {
  position: absolute;
  top: 2rem; right: 2rem;
  background: none; border: none;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
}

/* ---- Footer ---- */
footer {
  background: var(--charcoal);
  color: rgba(255,255,255,0.7);
  padding: 3rem 5vw 2rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  color: var(--white);
  font-weight: 700;
}
.footer-tagline {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.25rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-links a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  padding: 0.3rem 0.75rem;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 30px;
  transition: var(--transition);
}
.footer-links a:hover {
  background: var(--teal-deep);
  color: var(--white);
  border-color: var(--teal-deep);
}
.footer-social {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-btn);
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.8);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.12);
  transition: var(--transition);
}
.social-btn:hover {
  background: var(--teal-mid);
  color: var(--white);
}
.footer-bottom {
  margin-top: 1.5rem;
  font-size: 0.78rem;
  text-align: center;
  color: rgba(255,255,255,0.35);
}

/* ---- Shared Utilities ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 5vw; }
.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }

.section-tag {
  display: inline-block;
  background: var(--teal-deep);
  color: var(--white);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 30px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  margin-bottom: 0.5rem;
  color: var(--charcoal);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--slate-light);
  max-width: 600px;
  margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  border: 2px solid transparent;
}
.btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.btn-primary {
  background: var(--teal-deep);
  color: var(--white);
  border-color: var(--teal-deep);
}
.btn-primary:hover { background: var(--teal-mid); border-color: var(--teal-mid); }
.btn-outline {
  background: transparent;
  color: var(--teal-deep);
  border-color: var(--teal-deep);
}
.btn-outline:hover { background: var(--teal-deep); color: var(--white); }
.btn-white {
  background: var(--white);
  color: var(--teal-deep);
  border-color: var(--white);
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-body { padding: 1.5rem; }

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* Dark strip */
.strip-dark {
  background: var(--teal-deep);
  color: var(--white);
  padding: 4rem 5vw;
  text-align: center;
}
.strip-dark h2 {
  font-family: 'Playfair Display', serif;
  color: var(--sand);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  margin-bottom: 1rem;
}
.strip-dark p { color: rgba(255,255,255,0.75); font-size: 1.05rem; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  nav { padding: 0.65rem 1.25rem; }
  .section { padding: 3.5rem 0; }
}