/* ==========================================================================
   SSC Health — Premium Corporate Healthcare Design System v3.0
   Inspired by: Mayo Clinic, Cleveland Clinic, WHO, Harvard Medical
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700;800&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Colors */
  --primary: #0B4F8C;
  --primary-light: #1a6bb5;
  --primary-dark: #083566;
  --secondary: #0B4F8C;
  --accent: #2196F3;
  --accent-light: #E3F2FD;
  --bg-white: #FFFFFF;
  --bg-off-white: #F8F9FA;
  --bg-card: #FFFFFF;
  --bg-light: #F0F4F8;
  --text-dark: #1A1A2E;
  --text-body: #4A5568;
  --text-muted: #718096;
  --text-light: #FFFFFF;
  --text-light-muted: #A0AEC0;
  --border: #E2E8F0;
  --border-light: #EDF2F7;
  --success: #48BB78;
  --warning: #ED8936;
  --error: #F56565;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 5rem;
  --space-16: 8rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.12);

  /* Transitions */
  --transition: all 0.3s ease;

  /* Legacy aliases */
  --primary-color: var(--primary);
  --secondary-color: var(--bg-off-white);
  --accent-color: var(--accent);
  --accent-gold: #D4A843;
  --bg-main: var(--bg-off-white);
  --text-color: var(--text-body);
  --text-dark-legacy: var(--text-dark);
  --border-soft: var(--border);
  --font-serif: 'Georgia', serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-white);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-dark);
}
p { margin-bottom: var(--space-4); }
p:last-child { margin-bottom: 0; }
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.container-narrow { max-width: 900px; margin: 0 auto; padding: 0 var(--space-6); }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 var(--space-6); }

/* ── Typography ── */
h1 { font-size: clamp(2rem, 5vw, var(--font-size-5xl)); }
h2 { font-size: clamp(1.5rem, 3.5vw, var(--font-size-4xl)); }
h3 { font-size: clamp(1.25rem, 2.5vw, var(--font-size-2xl)); }
h4 { font-size: clamp(1.1rem, 2vw, var(--font-size-xl)); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-muted { color: var(--text-muted); }
.text-light { color: var(--text-light); }
.text-primary { color: var(--primary); }
.text-center { text-align: center; }
.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: var(--space-3);
  position: relative;
}
.section-title {
  font-size: clamp(1.5rem, 3.5vw, var(--font-size-4xl));
  margin-bottom: var(--space-4);
  color: var(--text-dark);
}
.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto var(--space-10) auto;
  text-align: center;
  line-height: 1.8;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.4;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-primary {
  background: var(--primary);
  color: var(--text-light);
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-light);
  border-color: var(--primary-light);
  color: var(--text-light);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--text-light);
}
.btn-light {
  background: var(--text-light);
  color: var(--primary);
  border-color: var(--text-light);
}
.btn-light:hover { background: var(--bg-off-white); color: var(--primary-dark); }
.btn-sm { padding: 8px 20px; font-size: var(--font-size-xs); }
.btn-lg { padding: 16px 36px; font-size: var(--font-size-base); }

/* ── Grid System ── */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ── Sections ── */
.section {
  padding: var(--space-16) 0;
}
.section-sm { padding: var(--space-8) 0; }
.section-white { background: var(--bg-white); }
.section-light { background: var(--bg-off-white); }
.section-primary {
  background: var(--primary);
  color: var(--text-light);
}
.section-primary h1, .section-primary h2, .section-primary h3,
.section-primary .section-title { color: var(--text-light); }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.card-body { padding: var(--space-6); }
.card-img { width: 100%; height: 200px; object-fit: cover; }
.card-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  color: var(--primary);
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

/* ── Navigation ── */
.main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: transparent;
  transition: var(--transition);
  padding: var(--space-4) 0;
}
.main-nav.scrolled {
  background: var(--bg-white);
  box-shadow: var(--shadow-md);
  padding: var(--space-2) 0;
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--text-light);
  text-decoration: none;
}
.scrolled .nav-logo { color: var(--text-dark); }
.nav-logo img { height: 40px; width: auto; filter: brightness(0) invert(1); }
.scrolled .nav-logo img { filter: none; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.nav-links > li > a {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.scrolled .nav-links > li > a { color: var(--text-body); }
.nav-links > li > a:hover { background: rgba(255,255,255,0.1); color: var(--text-light); }
.scrolled .nav-links > li > a:hover { background: var(--bg-light); color: var(--primary); }

/* Dropdown */
.nav-item { position: relative; }
.dropdown-content {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
  z-index: 100;
}
.nav-item:hover .dropdown-content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-content a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--text-body);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.dropdown-content a:hover { background: var(--bg-light); color: var(--primary); }
.dropdown-content .mega-card { display: flex; align-items: center; gap: var(--space-3); }
.mega-menu { width: 600px; padding: var(--space-4); }

/* Mobile toggle */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}
.mobile-nav-toggle .bar {
  width: 24px; height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}
.scrolled .mobile-nav-toggle .bar { background: var(--text-dark); }
.mobile-nav-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-nav-toggle.active .bar:nth-child(2) { opacity: 0; }
.mobile-nav-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}
.hero-sm { min-height: 40vh; }
.hero-md { min-height: 55vh; }
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.15;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,79,140,0.95) 0%, rgba(11,79,140,0.85) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: var(--space-10) 0;
}
.hero-content h1 { color: var(--text-light); margin-bottom: var(--space-5); }
.hero-content p {
  font-size: var(--font-size-lg);
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--space-6);
  line-height: 1.8;
}
.hero-cta { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounceDown 2s ease-in-out infinite;
  opacity: 0.6;
}
@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-4);
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--text-light); }
.breadcrumb span { color: var(--text-light); }

/* ── Footer ── */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding: var(--space-8) 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}
.footer-brand p { font-size: var(--font-size-sm); line-height: 1.6; color: rgba(255,255,255,0.6); }
.footer-heading {
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-light);
  margin-bottom: var(--space-3);
}
.footer-links { display: flex; flex-direction: column; gap: var(--space-1); }
.footer-links a {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--text-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: var(--space-4) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.5);
}
.footer-social { display: flex; gap: var(--space-4); }
.footer-social a {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: var(--text-light);
  transform: translateY(-2px);
}
.footer-logo {
  display: flex; align-items: center; gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.footer-logo img { height: 44px; width: auto; }
.footer-logo span {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-light);
}

/* ── Features / Stats ── */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.stat-item { text-align: center; }
.stat-number {
  font-family: var(--font-heading);
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.stat-label { font-size: var(--font-size-sm); color: var(--text-muted); }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-6); }

/* ── Leadership ── */
.leader-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-6); }
.leader-card {
  text-align: center;
  padding: var(--space-6);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.leader-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.leader-img {
  width: 120px; height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--space-4);
  border: 3px solid var(--border-light);
}
.leader-name {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--space-1);
}
.leader-role {
  font-size: var(--font-size-xs);
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}
.leader-location {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ── Conference Specific ── */
.agenda-table { width: 100%; border-collapse: collapse; font-size: var(--font-size-sm); }
.agenda-table th {
  background: var(--bg-off-white);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--text-dark);
  border-bottom: 2px solid var(--border);
}
.agenda-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-light);
  vertical-align: top;
}
.agenda-table tr:hover td { background: var(--bg-light); }
.session-row td { background: var(--accent-light); font-weight: 600; color: var(--primary); }
.lunch-row td { background: var(--bg-off-white); text-align: center; font-weight: 600; color: var(--text-muted); }
.hall-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: var(--space-4) var(--space-6);
}
.incharge-bar {
  background: var(--bg-light);
  padding: var(--space-2) var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  border-left: 3px solid var(--primary);
}
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}
.badge-lecture { background: var(--accent-light); color: var(--primary); }
.badge-openmic { background: #FEF3C7; color: #92400E; }
.badge-plenary { background: #FEE2E2; color: #991B1B; }

/* ── Gallery ── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}
.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
}
.gallery-item img {
  width: 100%; height: 240px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.gallery-item:hover img { transform: scale(1.05); }
.gallery-item--featured { grid-column: span 2; grid-row: span 2; }
.gallery-item--featured img { height: 100%; }

/* ── Forms ── */
.form-group { margin-bottom: var(--space-5); }
.form-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--space-2);
}
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition);
  background: var(--bg-white);
  color: var(--text-dark);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11,79,140,0.1);
}
.form-textarea { min-height: 140px; resize: vertical; }

/* ── Timeline ── */
.timeline { position: relative; padding-left: var(--space-8); }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: 4px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg-white);
  box-shadow: 0 0 0 2px var(--primary);
}
.timeline-year {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-2);
}

/* ── Accordion ── */
.accordion { border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-item:last-child { border-bottom: none; }
.accordion-header {
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-dark);
  transition: var(--transition);
  background: var(--bg-white);
}
.accordion-header:hover { background: var(--bg-light); }
.accordion-header.active { background: var(--accent-light); color: var(--primary); }
.accordion-body {
  padding: 0 var(--space-6);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.accordion-body.open {
  max-height: 500px;
  padding: var(--space-5) var(--space-6);
}

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}
.contact-info-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-off-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}
.contact-icon {
  width: 48px; height: 48px; min-width: 48px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-light);
  color: var(--primary);
  border-radius: var(--radius-md);
  font-size: 1.25rem;
}

/* ── Pricing / Membership ── */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-6); }
.pricing-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.pricing-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  position: relative;
}
.pricing-card.featured::before {
  content: 'Popular';
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--primary);
  color: var(--text-light);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}
.pricing-amount {
  font-family: var(--font-heading);
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--primary);
  margin: var(--space-4) 0;
}

/* ── Animations ── */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-in { opacity: 0; transition: opacity 0.6s ease; }
.fade-in.visible { opacity: 1; }
[data-delay="100"] { transition-delay: 0.1s; }
[data-delay="200"] { transition-delay: 0.2s; }
[data-delay="300"] { transition-delay: 0.3s; }
[data-delay="400"] { transition-delay: 0.4s; }

/* ── Utilities ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ── Back to Top ── */
#scrollTopBtn {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--text-light);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
}
#scrollTopBtn:hover { background: var(--primary-light); transform: translateY(-3px); }

/* ── Responsive ── */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-content { max-width: 100%; }
  .nav-links {
    position: fixed !important;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: var(--space-16) var(--space-6) var(--space-6);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    overflow-y: auto;
  }
  .nav-links { z-index: 1001; }
  .nav-links.active { opacity: 1; visibility: visible; }
  .nav-links > li > a { color: var(--text-dark); font-size: var(--font-size-base); }
  .nav-links > li > a .fa-chevron-down { transition: transform 0.3s; }
  .nav-links > li.drop-active > a .fa-chevron-down { transform: rotate(180deg); }
  .mobile-nav-toggle { display: flex; position: relative; z-index: 1002; }
  body.menu-open { overflow: hidden; }
  body.menu-open #progressBar { display: none; }
  body.menu-open #scrollTopBtn { display: none; }
  .dropdown-content {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 0 var(--space-4);
    display: none;
  }
  .dropdown-content.open { display: block; }
  .mega-menu { width: 100%; }
  .gallery-item--featured { grid-column: auto; grid-row: auto; }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: var(--space-10) 0; }
  .hero { min-height: 70vh; }
  .hero-sm { min-height: 35vh; }
  .hero-md { min-height: 45vh; }
  .pricing-grid { grid-template-columns: 1fr; }
  .btn { white-space: normal; }
}
@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .container { padding: 0 var(--space-4); }
}

/* ── Floating Action Button ── */
.floating-reg-btn {
  position: fixed; bottom: 30px; right: 30px;
  background: linear-gradient(135deg, var(--primary) 0%, #0a3d6e 100%);
  color: #fff !important; padding: 14px 28px; border-radius: 50px;
  font-weight: 700; text-decoration: none !important; font-size: 0.9rem;
  box-shadow: 0 10px 30px rgba(11,79,140,0.35);
  z-index: 9999; display: flex; align-items: center; gap: 10px;
  transition: var(--transition); letter-spacing: 0.5px;
  border: none; cursor: pointer;
}
.floating-reg-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(11,79,140,0.45);
  background: linear-gradient(135deg, #0a3d6e 0%, #0B4F8C 100%);
}
@media (max-width: 768px) {
  .floating-reg-btn { bottom: 20px; right: 20px; padding: 12px 22px; font-size: 0.8rem; }
}