/* ============================================
   DR. AMIT KUMAR SINHA — WEBSITE STYLESHEET
   Design: Refined Medical Luxury
   Palette: Deep Navy + Warm Gold + Cream
   ============================================ */

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

:root {
  --navy: #0d1b2e;
  --navy-light: #152540;
  --gold: #c8a96e;
  --gold-light: #e0c898;
  --gold-pale: #f5eedf;
  --cream: #faf7f2;
  --white: #ffffff;
  --text: #2c3e50;
  --text-light: #6b7a8d;
  --border: #e8e0d5;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(13,27,46,0.10);
  --shadow-lg: 0 12px 48px rgba(13,27,46,0.16);
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--cream);
  line-height: 1.65;
  overflow-x: hidden;
}

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

/* ── TOP BAR ── */
.topbar {
  background: var(--navy);
  color: rgba(255,255,255,0.85);
  font-size: 0.78rem;
  padding: 8px 0;
  letter-spacing: 0.02em;
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.topbar .sep { opacity: 0.4; }
.topbar-wa {
  margin-left: auto;
  background: #25d366;
  color: white;
  padding: 4px 14px;
  border-radius: 20px;
  font-weight: 500;
  font-size: 0.75rem;
  transition: background 0.2s;
}
.topbar-wa:hover { background: #1eb859; }

/* ── NAVBAR ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(13,27,46,0.06);
  transition: box-shadow 0.3s;
}
.navbar.scrolled { box-shadow: 0 4px 20px rgba(13,27,46,0.12); }

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 70px;
  gap: 24px;
}
.nav-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  flex-shrink: 0;
}
.brand-dr {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--gold);
  font-style: italic;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
}
.brand-tag {
  font-size: 0.62rem;
  color: var(--text-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--navy); background: var(--gold-pale); }
.nav-cta {
  background: var(--navy) !important;
  color: white !important;
  padding: 8px 18px !important;
  border-radius: 6px !important;
}
.nav-cta:hover { background: var(--gold) !important; color: var(--navy) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: 0.3s;
}

/* ── HERO ── */
.hero {
  min-height: 92vh;
  background: var(--navy);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 80px 24px;
  gap: 60px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 30% 50%, rgba(200,169,110,0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(200,169,110,0.08) 0%, transparent 50%);
}
.hero-content {
  max-width: 580px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  flex: 1;
  min-width: 280px;
}
.hero-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--navy);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 28px;
  animation: fadeUp 0.6s ease both;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 300;
  color: white;
  line-height: 1.05;
  margin-bottom: 20px;
  animation: fadeUp 0.6s 0.1s ease both;
}
.hero-dr { display: block; }
.hero-sinha {
  display: block;
  font-weight: 700;
  color: var(--gold);
  font-style: italic;
}
.hero-subtitle {
  color: rgba(255,255,255,0.65);
  font-size: 1rem;
  margin-bottom: 40px;
  animation: fadeUp 0.6s 0.2s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 40px;
  animation: fadeUp 0.6s 0.3s ease both;
  flex-wrap: wrap;
  gap: 12px;
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}
.stat-label {
  display: block;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.02em;
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
  margin: 0 20px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  animation: fadeUp 0.6s 0.4s ease both;
}
.btn-primary {
  background: var(--gold);
  color: var(--navy);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}
.btn-primary:hover { background: var(--gold-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(200,169,110,0.4); }
.btn-primary.full-width { width: 100%; text-align: center; }

.btn-outline {
  background: transparent;
  color: white;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.3);
  transition: all 0.2s;
  display: inline-block;
}
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: white; }

/* Hero Image */
.hero-image-wrap {
  position: relative;
  flex-shrink: 0;
  z-index: 2;
  animation: fadeUp 0.8s 0.3s ease both;
}
.hero-image-frame {
  width: 320px;
  height: 420px;
  border-radius: 16px;
  overflow: hidden;
  border: 3px solid rgba(200,169,110,0.4);
  position: relative;
  background: var(--navy-light);
}
.hero-img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.hero-img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-display);
  font-size: 1.1rem;
  gap: 12px;
}
.hero-image-frame:not(.no-img) .hero-img-placeholder { display: none; }

.hero-card {
  position: absolute;
  bottom: -20px;
  left: -30px;
  background: white;
  border-radius: 12px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-lg);
  min-width: 220px;
}
.hc-icon { font-size: 1.4rem; }
.hc-title { font-size: 0.7rem; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.06em; }
.hc-sub { font-size: 0.85rem; font-weight: 600; color: var(--navy); }

/* ── SECTIONS ── */
.section { padding: 100px 24px; }
.container { max-width: 1200px; margin: 0 auto; }
.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  color: var(--navy);
  line-height: 1.15;
  margin-bottom: 48px;
}
.section-title em { font-style: italic; color: var(--gold); font-weight: 400; }

/* ── ABOUT ── */
.about-section { background: white; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.about-text p { margin-bottom: 18px; color: var(--text); line-height: 1.75; }
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: var(--navy); }
.about-text em { color: var(--gold); font-style: italic; }
.highlight-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  transition: box-shadow 0.2s, border-color 0.2s;
  background: var(--cream);
}
.highlight-card:hover { box-shadow: var(--shadow); border-color: var(--gold-light); }
.hcard-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.hcard-text strong { display: block; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.hcard-text span { font-size: 0.85rem; color: var(--text-light); }

/* ── SERVICES ── */
.services-section { background: var(--cream); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  background: white;
  border-radius: var(--radius);
  padding: 36px 28px;
  border: 1px solid var(--border);
  position: relative;
  transition: all 0.25s;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.sc-num {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--gold-pale);
  line-height: 1;
  margin-bottom: 8px;
}
.sc-icon { font-size: 1.8rem; margin-bottom: 16px; }
.service-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.service-card p { font-size: 0.87rem; color: var(--text-light); line-height: 1.65; }

/* ── NANO ── */
.nano-section { background: var(--navy); padding: 100px 24px; }
.nano-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.nano-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}
.nano-badge-large {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--gold);
  text-align: center;
  line-height: 1;
  z-index: 2;
  position: relative;
  letter-spacing: 0.05em;
}
.nano-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(200,169,110,0.2);
}
.nano-ring-1 { width: 220px; height: 220px; animation: pulse-ring 3s ease-in-out infinite; }
.nano-ring-2 { width: 340px; height: 340px; animation: pulse-ring 3s 1.5s ease-in-out infinite; }
@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.2; }
  50% { transform: scale(1.05); opacity: 0.5; }
}
.nano-features-list {
  position: relative;
  z-index: 2;
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.nf {
  color: var(--gold-light);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nano-content .section-label { color: var(--gold); }
.nano-content .section-title { color: white; margin-bottom: 28px; }
.nano-content p { color: rgba(255,255,255,0.7); margin-bottom: 18px; line-height: 1.75; }
.nano-content strong { color: var(--gold-light); }

.nano-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
}
.nc-col {
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  padding: 20px;
  border: 1px solid rgba(255,255,255,0.08);
}
.nc-head {
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.nc-head.traditional { color: rgba(255,255,255,0.5); }
.nc-head.nano { color: var(--gold); }
.nc-col ul { list-style: none; padding: 0; }
.nc-col ul li {
  font-size: 0.85rem;
  padding: 5px 0;
  color: rgba(255,255,255,0.65);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.nc-col:last-child ul li { color: var(--gold-light); }

/* ── CREDENTIALS ── */
.creds-section { background: white; }
.creds-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; margin-bottom: 56px; }
.creds-heading {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gold);
}
.cred-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.cred-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.cred-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--navy);
  flex-shrink: 0;
  margin-top: 6px;
}
.cred-dot.gold { background: var(--gold); }
.cred-dot.blue { background: #3b7be8; }
.cred-item strong { display: block; font-weight: 700; color: var(--navy); margin-bottom: 4px; font-size: 0.9rem; }
.cred-item span { font-size: 0.82rem; color: var(--text-light); line-height: 1.5; }

.awards-strip {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  border-radius: var(--radius);
  padding: 36px;
}
.award-item {
  text-align: center;
  color: white;
  flex: 1;
  min-width: 140px;
}
.award-icon { font-size: 2rem; display: block; margin-bottom: 8px; }
.award-item strong { display: block; font-size: 0.9rem; font-weight: 700; color: var(--gold); margin-bottom: 4px; }
.award-item span { font-size: 0.75rem; color: rgba(255,255,255,0.6); }

/* ── WHY CHOOSE ── */
.why-section { background: var(--cream); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.why-card {
  background: white;
  border-radius: var(--radius);
  padding: 36px 28px;
  border: 1px solid var(--border);
  transition: all 0.25s;
}
.why-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.why-icon { font-size: 2rem; margin-bottom: 16px; }
.why-card h3 { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.why-card p { font-size: 0.87rem; color: var(--text-light); line-height: 1.65; }

/* ── FAQ ── */
.faq-section { background: white; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}
.faq-q {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 22px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color 0.2s;
  font-family: var(--font-body);
}
.faq-q:hover { color: var(--gold); }
.faq-arrow {
  font-size: 1.4rem;
  font-weight: 300;
  flex-shrink: 0;
  transition: transform 0.3s;
  line-height: 1;
}
.faq-q.open .faq-arrow { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s;
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.75;
  padding: 0;
}
.faq-a.open { max-height: 300px; padding-bottom: 20px; }

/* ── CONTACT ── */
.contact-section { background: var(--cream); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 60px; align-items: start; }
.ci-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}
.ci-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 3px; }
.ci-item strong { display: block; font-weight: 700; color: var(--navy); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 4px; }
.ci-item span { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }
.ci-item a { color: var(--gold); font-weight: 500; }
.ci-item a:hover { text-decoration: underline; }

.contact-social { display: flex; gap: 12px; margin-top: 8px; }
.social-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s;
}
.social-btn.facebook { background: #1877f2; color: white; }
.social-btn.facebook:hover { background: #1464d8; }
.social-btn.whatsapp { background: #25d366; color: white; }
.social-btn.whatsapp:hover { background: #1dba58; }

.contact-form-wrap {
  background: white;
  border-radius: var(--radius);
  padding: 48px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: var(--font-body);
  color: var(--text);
  background: white;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(200,169,110,0.15);
}
.form-group textarea { resize: vertical; }
.form-success {
  display: none;
  background: #d4edda;
  color: #155724;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 16px;
}
.form-success.show { display: block; }

/* ── MAP ── */
.map-wrap { width: 100%; line-height: 0; }

/* ── FOOTER ── */
.footer { background: var(--navy); color: white; padding: 72px 24px 0; }
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .brand-dr { font-size: 1rem; }
.footer-brand .brand-name { font-size: 1.5rem; }
.footer-brand p {
  margin-top: 12px;
  font-size: 0.87rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}
.footer-disclaimer {
  font-size: 0.75rem !important;
  margin-top: 20px !important;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.4) !important;
}
.footer-links h4, .footer-contact h4 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
.footer-links a, .footer-contact p, .footer-contact a {
  display: block;
  font-size: 0.87rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 10px;
  transition: color 0.2s;
  line-height: 1.5;
}
.footer-links a:hover, .footer-contact a:hover { color: var(--gold-light); }

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 0;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* ── FLOATING CTA ── */
.floating-cta {
  position: fixed;
  bottom: 28px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 200;
}
.float-wa, .float-call {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  transition: transform 0.2s, box-shadow 0.2s;
}
.float-wa { background: #25d366; }
.float-call { background: var(--navy); }
.float-wa:hover, .float-call:hover { transform: scale(1.1); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .creds-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .nano-grid { grid-template-columns: 1fr; gap: 40px; }
  .nano-visual { min-height: 260px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .hero { flex-direction: column; text-align: center; min-height: auto; padding: 60px 24px; }
  .hero-content { max-width: 100%; }
  .hero-image-frame { width: 260px; height: 340px; }
  .hero-card { left: 0; bottom: -16px; }
  .hero-stats { justify-content: center; }
  .hero-actions { justify-content: center; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0; right: 0;
    background: white;
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 16px; width: 100%; }
  .nav-inner { position: relative; }

  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .creds-grid { grid-template-columns: 1fr; }
  .nano-compare { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 28px 20px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 64px 20px; }
  .awards-strip { padding: 24px 16px; }
  .topbar { display: none; }
  .contact-social { flex-direction: column; }
}

@media (max-width: 480px) {
  .hero-image-frame { width: 220px; height: 280px; }
  .hero-card { display: none; }
  .stat-divider { display: none; }
}