/* ==========================================================================
   MBDMI Enablers — Modern B2B Engineering Stylesheet
   Domain: https://mbdmieenablers.co.in
   Focus: Model-Based Definition (MBD) & Model-Based Enterprise (MBE)
   ========================================================================== */

:root {
  --color-primary-navy: #0B192C;
  --color-navy-dark: #070F1A;
  --color-navy-light: #1E3E62;
  --color-tech-blue: #0062CC;
  --color-tech-blue-hover: #004FA3;
  --color-accent-teal: #00A896;
  --color-accent-cyan: #00B4D8;
  --color-accent-cyan-light: #E0F7FA;
  --color-bg-light: #F8FAFC;
  --color-card-bg: #FFFFFF;
  --color-border: #E2E8F0;
  --color-border-hover: #CBD5E1;
  --color-text-main: #0F172A;
  --color-text-muted: #475569;
  --color-text-subtle: #64748B;
  --color-white: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --container-max-width: 1240px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text-main);
  background-color: var(--color-bg-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-tech-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-tech-blue-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  min-height: 76px;
}

/* Header Rectangular Logo & Tagline */
.brand-link {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
  cursor: pointer;
}

.brand-logo-img {
  width: 220px;
  max-width: 220px;
  height: auto;
  object-fit: contain;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.brand-tagline-text {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--color-primary-navy);
  text-transform: uppercase;
  margin-top: 4px;
  white-space: nowrap;
  line-height: 1.25;
  background: #F1F5F9;
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid #E2E8F0;
  display: inline-flex;
  align-items: center;
}

.brand-tagline-text .tag-sep {
  color: var(--color-accent-teal);
  margin: 0 5px;
  font-weight: 900;
}

.brand-click-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--color-tech-blue);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 2px;
  opacity: 0.85;
}

.brand-link:hover .brand-logo-img {
  transform: translateY(-1px);
  filter: drop-shadow(0 2px 8px rgba(0, 98, 204, 0.2));
}

.brand-link:hover .brand-click-hint {
  opacity: 1;
  text-decoration: underline;
}
}

/* Navigation Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-tech-blue);
  transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary-navy);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.header-cta {
  display: flex;
  align-items: center;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-main);
}

.mobile-nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1.25;
}

.btn-primary {
  background-color: var(--color-tech-blue);
  color: var(--color-white);
  box-shadow: 0 2px 4px rgba(0, 98, 204, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-tech-blue-hover);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 98, 204, 0.35);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary-navy);
  border-color: var(--color-primary-navy);
}

.btn-outline:hover {
  background-color: var(--color-primary-navy);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-outline-white {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-white:hover {
  background-color: var(--color-white);
  color: var(--color-primary-navy);
  border-color: var(--color-white);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.badge-tech {
  background-color: #EBF5FF;
  color: #0056B3;
  border: 1px solid #C3E0FF;
}

.badge-teal {
  background-color: #E6FFFA;
  color: #0D9488;
  border: 1px solid #B2F5EA;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, #0B192C 0%, #102A43 65%, #0A364A 100%);
  color: var(--color-white);
  padding: 5rem 0 6rem;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 15% 25%, rgba(0, 180, 216, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(0, 98, 204, 0.2) 0%, transparent 45%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 650px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-accent-cyan);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-title .gradient-text {
  background: linear-gradient(90deg, #38BDF8, #2DD4BF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: #CBD5E1;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1.5rem;
}

.hero-badge-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: #94A3B8;
}

.hero-badge-item svg {
  color: var(--color-accent-teal);
}

/* Hero Visual Card with Circular Logo Integration */
.hero-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(16px);
  position: relative;
}

.hero-emblem-badge {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.emblem-img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  background-color: #FFFFFF;
  padding: 2px;
}

.emblem-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 0.25rem;
}

.emblem-info p {
  font-size: 0.85rem;
  color: #94A3B8;
  line-height: 1.4;
}

/* Digital Thread Flow Chart */
.flow-diagram {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent-cyan);
  transition: all var(--transition-fast);
}

.flow-step:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.flow-step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent-cyan);
  background: rgba(0, 180, 216, 0.15);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.flow-step-text strong {
  display: block;
  font-size: 0.9rem;
  color: #FFFFFF;
}

.flow-step-text span {
  font-size: 0.78rem;
  color: #94A3B8;
}

/* ==========================================================================
   Section Headers & Common
   ========================================================================== */
.section-padding {
  padding: 5.5rem 0;
}

.section-padding-sm {
  padding: 3.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.section-header .section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-tech-blue);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-primary-navy);
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Pillars & Capabilities Grid
   ========================================================================== */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.capability-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.capability-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-tech-blue), var(--color-accent-teal));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-border-hover);
}

.capability-card:hover::before {
  opacity: 1;
}

.card-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: #EFF6FF;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-tech-blue);
  margin-bottom: 1.5rem;
}

.card-icon-box.teal {
  background: #E6FFFA;
  color: var(--color-accent-teal);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary-navy);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-feature-list {
  list-style: none;
  border-top: 1px solid var(--color-border);
  padding-top: 1.25rem;
  margin-bottom: 1.25rem;
}

.card-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--color-text-main);
  margin-bottom: 0.6rem;
}

.card-feature-item svg {
  color: var(--color-accent-teal);
  flex-shrink: 0;
  margin-top: 3px;
}

.card-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* ==========================================================================
   Standards & Interoperability Deep Dive
   ========================================================================== */
.standards-section {
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.standards-tabs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  background-color: #EEF2F6;
  color: var(--color-primary-navy);
}

.tab-btn.active {
  background-color: var(--color-primary-navy);
  color: var(--color-white);
  border-color: var(--color-primary-navy);
  box-shadow: var(--shadow-sm);
}

.tab-pane {
  display: none;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  animation: fadeIn 0.3s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.tab-text h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-navy);
  margin-bottom: 1rem;
}

.tab-text p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.spec-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.92rem;
  color: var(--color-text-main);
}

.spec-item svg {
  color: var(--color-tech-blue);
  flex-shrink: 0;
  margin-top: 3px;
}

.tab-box-highlight {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
}

.tab-box-highlight h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-navy);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==========================================================================
   Engineering Value Matrix (Table)
   ========================================================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
}

.standards-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.standards-table th {
  background-color: var(--color-primary-navy);
  color: var(--color-white);
  padding: 1rem 1.25rem;
  font-weight: 600;
  white-space: nowrap;
}

.standards-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-main);
  vertical-align: top;
}

.standards-table tr:last-child td {
  border-bottom: none;
}

.standards-table tr:hover td {
  background-color: #F8FAFC;
}

/* ==========================================================================
   Consultation & Contact Section
   ========================================================================== */
.contact-section {
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3.5rem;
  align-items: flex-start;
}

.contact-info-card {
  background-color: var(--color-primary-navy);
  color: var(--color-white);
  padding: 3rem 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.contact-info-card::after {
  content: "";
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.contact-info-card h3 {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.contact-info-card p {
  color: #CBD5E1;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-meta-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.contact-meta-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-meta-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-cyan);
  flex-shrink: 0;
}

.contact-meta-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94A3B8;
  display: block;
  margin-bottom: 0.2rem;
}

.contact-meta-val {
  font-size: 1rem;
  font-weight: 600;
  color: #FFFFFF;
}

.contact-meta-val a {
  color: #FFFFFF;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.contact-meta-val a:hover {
  color: var(--color-accent-cyan);
}

.contact-form-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary-navy);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: #FFFFFF;
  color: var(--color-text-main);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-tech-blue);
  box-shadow: 0 0 0 3px rgba(0, 98, 204, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-alert {
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  display: none;
  font-size: 0.9rem;
}

.form-alert.success {
  background-color: #ECFDF5;
  border: 1px solid #A7F3D0;
  color: #065F46;
  display: block;
}

.form-alert.error {
  background-color: #FEF2F2;
  border: 1px solid #FECACA;
  color: #991B1B;
  display: block;
}

.form-alert.info {
  background-color: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: #1E40AF;
  display: block;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-navy-dark);
  color: #CBD5E1;
  padding: 4.5rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-col {
  max-width: 440px;
}

/* Footer Rectangular Logo */
.footer-logo-img {
  width: 220px;
  max-width: 220px;
  height: auto;
  object-fit: contain;
  margin-bottom: 0.65rem;
  background-color: #FFFFFF;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.footer-tagline-text {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-accent-cyan);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.footer-tagline-text .tag-sep {
  color: #64748B;
  margin: 0 4px;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #94A3B8;
  margin-bottom: 1.5rem;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
  padding-left: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #64748B;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary-navy);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-tech-blue);
  transform: translateY(-3px);
}

/* ==========================================================================
   Responsive Media Queries (Mobile, Tablet, Desktop)
   ========================================================================== */
@media (max-width: 1024px) {
  .brand-logo-img {
    width: 200px;
    max-width: 200px;
  }

  .nav-menu {
    gap: 1.25rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-content {
    max-width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .site-header .nav-wrapper {
    min-height: 64px;
    padding: 0.4rem 0;
  }

  /* Responsive Logo on Mobile: previous size */
  .brand-logo-img {
    width: 170px;
    max-width: 170px;
  }

  .brand-tagline-text {
    font-size: 0.52rem;
    letter-spacing: 0.02em;
  }

  .footer-logo-img {
    width: 200px;
    max-width: 200px;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    display: none;
  }

  .nav-menu.open {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .hero-section {
    padding: 3.5rem 0 4.5rem;
  }

  .tab-content-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .modal-keywords-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .logo-modal-content {
    padding: 1.5rem 1.25rem;
  }
}

/* ==========================================================================
   Logo Inspection Modal Window (Atmospheric Enlargement on Click)
   ========================================================================== */
.logo-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.logo-modal.active {
  opacity: 1;
  visibility: visible;
}

.logo-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(11, 25, 44, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
}

.logo-modal-content {
  position: relative;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  max-width: 760px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 2.25rem;
  z-index: 10000;
  transform: scale(0.92);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
}

.logo-modal.active .logo-modal-content {
  transform: scale(1);
}

.logo-modal-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: #F1F5F9;
  border: none;
  font-size: 1.85rem;
  line-height: 1;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  cursor: pointer;
  color: var(--color-primary-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.logo-modal-close:hover {
  background: var(--color-primary-navy);
  color: #FFFFFF;
  transform: rotate(90deg);
}

.modal-header-badge {
  display: flex;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.modal-logo-wrapper {
  background: #FFFFFF;
  padding: 1.5rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.75rem;
  display: flex;
  justify-content: center;
}

.modal-logo-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  object-fit: contain;
}

.modal-keywords-container {
  text-align: left;
}

.modal-keywords-heading {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-primary-navy);
  margin-bottom: 1rem;
  text-align: center;
  letter-spacing: 0.02em;
}

.modal-keywords-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.modal-keyword-card {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
  transition: transform var(--transition-fast);
}

.modal-keyword-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-tech-blue);
}

.keyword-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #EFF6FF;
  color: var(--color-tech-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.65rem;
}

.keyword-icon-box.teal {
  background: #E6FFFA;
  color: var(--color-accent-teal);
}

.keyword-icon-box.green {
  background: #F0FDF4;
  color: #16A34A;
}

.modal-keyword-card h5 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-primary-navy);
  margin-bottom: 0.35rem;
}

.modal-keyword-card p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.modal-footer-note {
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
  font-size: 0.82rem;
  color: var(--color-text-subtle);
  text-align: center;
}

.modal-footer-note a {
  color: var(--color-tech-blue);
  font-weight: 600;
}