/* ==========================================================================
   Meshram Diagnostics — design system
   ========================================================================== */

:root {
  --blue-950: #051c38;
  --blue-900: #062c52;
  --blue-800: #08386a;
  --blue-700: #0a4f96;
  --blue-600: #1170d1;
  --blue-500: #1c8bf0;
  --blue-400: #4fa8f7;
  --blue-200: #b9dcfc;
  --blue-100: #e5f2fe;
  --blue-50:  #f3f9ff;
  --ink: #0b1c2c;
  --ink-soft: #3c5164;
  --muted: #64798c;
  --white: #ffffff;
  --gold: #e7b654;
  --shadow-sm: 0 2px 10px rgba(6, 44, 82, 0.06);
  --shadow-md: 0 10px 30px rgba(6, 44, 82, 0.10);
  --shadow-lg: 0 24px 60px rgba(6, 44, 82, 0.16);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-family: 'Poppins', 'Noto Sans Devanagari', sans-serif;
  color: var(--ink);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

html[lang="hi"] body,
body.lang-hi {
  font-family: 'Noto Sans Devanagari', 'Poppins', sans-serif;
}

::selection { background: var(--blue-200); color: var(--blue-950); }

h1, h2, h3, h4, .font-heading {
  font-family: 'Poppins', 'Noto Sans Devanagari', sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--blue-50); }
::-webkit-scrollbar-thumb { background: var(--blue-300, #7fbcf6); border-radius: 10px; }

/* ---------- Utility layer additions ---------- */
.container-xl {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.text-gradient {
  background: linear-gradient(100deg, var(--blue-700), var(--blue-400) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.bg-dot-grid {
  background-image: radial-gradient(circle, rgba(17, 112, 209, 0.16) 1.4px, transparent 1.4px);
  background-size: 22px 22px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-600);
  background: var(--blue-100);
  padding: .4rem .9rem;
  border-radius: 999px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  font-weight: 600;
  font-size: .95rem;
  padding: .85rem 1.7rem;
  border-radius: 999px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .3s ease, color .3s ease;
  white-space: nowrap;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(120deg, var(--blue-600), var(--blue-800));
  color: #fff;
  box-shadow: 0 10px 24px rgba(17, 112, 209, .32);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(17, 112, 209, .4); }
.btn-outline {
  background: #fff;
  color: var(--blue-700);
  border: 1.5px solid var(--blue-200);
}
.btn-outline:hover { border-color: var(--blue-600); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.btn-ghost-white {
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.5);
  backdrop-filter: blur(6px);
}
.btn-ghost-white:hover { background: rgba(255,255,255,.22); transform: translateY(-3px); }

/* ---------- Header ---------- */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: background .4s var(--ease), padding .4s var(--ease), box-shadow .4s var(--ease);
}
#site-header.scrolled {
  padding: 10px 0;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}
#site-header .nav-link {
  position: relative;
  font-weight: 500;
  font-size: .95rem;
  color: var(--ink-soft);
  padding: .3rem .1rem;
  transition: color .25s ease;
}
#site-header .nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: var(--blue-600);
  transition: width .3s var(--ease);
  border-radius: 2px;
}
#site-header .nav-link:hover { color: var(--blue-700); }
#site-header .nav-link:hover::after,
#site-header .nav-link.active::after { width: 100%; }
#site-header .nav-link.active { color: var(--blue-700); font-weight: 600; }

.lang-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--blue-50);
  border: 1px solid var(--blue-200);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
  position: relative;
}
.lang-toggle button {
  position: relative;
  z-index: 2;
  border: none;
  background: transparent;
  font-size: .78rem;
  font-weight: 700;
  padding: .38rem .7rem;
  border-radius: 999px;
  color: var(--blue-700);
  transition: color .3s ease;
  cursor: pointer;
}
.lang-toggle button.active { color: #fff; }
.lang-toggle .lang-pill {
  position: absolute;
  top: 3px; bottom: 3px; left: 3px;
  width: calc(50% - 3px);
  background: linear-gradient(120deg, var(--blue-600), var(--blue-800));
  border-radius: 999px;
  transition: transform .35s var(--ease);
  z-index: 1;
}
.lang-toggle[data-lang="hi"] .lang-pill { transform: translateX(100%); }

/* ---------- Mobile nav ---------- */
#mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: linear-gradient(160deg, var(--blue-900), var(--blue-950));
  transform: translateY(-100%);
  opacity: 0;
  transition: transform .5s var(--ease), opacity .4s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem;
}
#mobile-nav.open { transform: translateY(0); opacity: 1; }
#mobile-nav a {
  color: #fff;
  font-size: 1.7rem;
  font-weight: 600;
  padding: .6rem 0;
  border-bottom: 1px solid rgba(255,255,255,.12);
}

.hamburger {
  width: 26px; height: 20px;
  position: relative;
  cursor: pointer;
}
.hamburger span {
  position: absolute; left: 0;
  width: 100%; height: 2.4px;
  background: var(--blue-800);
  border-radius: 4px;
  transition: all .35s var(--ease);
}
.hamburger span:nth-child(1){ top: 0; }
.hamburger span:nth-child(2){ top: 9px; }
.hamburger span:nth-child(3){ top: 18px; }
.hamburger.open span:nth-child(1){ transform: translateY(9px) rotate(45deg); }
.hamburger.open span:nth-child(2){ opacity: 0; }
.hamburger.open span:nth-child(3){ transform: translateY(-9px) rotate(-45deg); }

/* ---------- Reveal animations ----------
   Elements are fully visible by default (no-JS / slow-JS safe).
   JS applies the hidden starting state via inline style right before
   observing, then clears it on intersect — see reobserveReveal() in main.js. */
[data-reveal] {
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}

.stagger > * { transition-delay: calc(var(--i, 0) * 90ms); }

/* Floating / decorative motion */
@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}
.float { animation: float-y 5.5s ease-in-out infinite; }
.float-slow { animation: float-y 8s ease-in-out infinite; }
.float-delay { animation-delay: 1.2s; }

@keyframes pulse-ring {
  0% { transform: scale(.9); opacity: .7; }
  70% { transform: scale(1.6); opacity: 0; }
  100% { opacity: 0; }
}
.pulse-ring::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: 999px;
  border: 2px solid var(--blue-400);
  animation: pulse-ring 2.4s ease-out infinite;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.marquee-track { animation: marquee 26s linear infinite; }

@keyframes sonar-sweep {
  0% { stroke-dashoffset: 340; }
  100% { stroke-dashoffset: 0; }
}
.sonar-path { stroke-dasharray: 340; animation: sonar-sweep 2.6s var(--ease) infinite; }

@keyframes gradient-pan {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.gradient-animate {
  background-size: 220% 220%;
  animation: gradient-pan 10s ease infinite;
}

@keyframes blink-dot {
  0%, 100% { opacity: 1; } 50% { opacity: .3; }
}
.blink-dot { animation: blink-dot 1.6s ease-in-out infinite; }

/* Cards */
.card {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }

.service-card {
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: -60%; right: -30%;
  width: 220px; height: 220px;
  background: radial-gradient(circle, var(--blue-100), transparent 70%);
  border-radius: 50%;
  transition: transform .5s var(--ease);
}
.service-card:hover::before { transform: scale(1.4); }

/* Number badge */
.num-badge {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 2.6rem;
  color: var(--blue-100);
  line-height: 1;
}

/* Hero blob shape */
.blob-shape {
  border-radius: 42% 58% 63% 37% / 41% 44% 56% 59%;
}

/* Back to top */
#back-to-top {
  position: fixed;
  right: 20px; bottom: 20px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--blue-600), var(--blue-800));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none;
  transform: translateY(16px);
  transition: all .4s var(--ease);
  z-index: 60;
}
#back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* WhatsApp float */
#wa-float {
  position: fixed;
  left: 20px; bottom: 20px;
  z-index: 60;
  width: 54px; height: 54px;
  border-radius: 50%;
  background: #25D366;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 26px rgba(37, 211, 102, .45);
}

/* Form elements */
.field label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: .4rem;
  display: block;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1.5px solid #dfe8f0;
  background: var(--blue-50);
  border-radius: var(--radius-sm);
  padding: .8rem 1rem;
  font-size: .95rem;
  color: var(--ink);
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  background: #fff;
  box-shadow: 0 0 0 4px var(--blue-100);
}
.field.error input, .field.error select { border-color: #e5484d; background: #fff5f5; }
.field .err-msg { display: none; color: #e5484d; font-size: .78rem; margin-top: .3rem; }
.field.error .err-msg { display: block; }

/* Timeline */
.timeline-line {
  background: linear-gradient(180deg, var(--blue-200), var(--blue-600), var(--blue-200));
}

/* Testimonial card */
.quote-mark {
  font-family: Georgia, serif;
  line-height: .6;
}

/* Utility: aspect image hover zoom */
.img-zoom { overflow: hidden; }
.img-zoom img { transition: transform .8s var(--ease); }
.img-zoom:hover img { transform: scale(1.08); }

/* Divider wave */
.wave-divider svg { display: block; width: 100%; height: auto; }

@media (max-width: 767px) {
  .num-badge { font-size: 2rem; }
}