/* ==========================================================================
   RESEARCHERSDEN - MASTER DESIGN SYSTEM & STYLESHEET
   Brand Personality: Academic, Trustworthy, Modern, Approachable
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;0,8..60,700;1,8..60,400&display=swap');

:root {
  /* Brand Palette */
  --color-primary-navy: #142D4E;
  --color-deep-navy: #0D2038;
  --color-white: #FFFFFF;
  --color-teal: #159A9C;
  --color-teal-hover: #0E7490;
  --color-teal-accent: #2DD4BF;
  --color-light-teal: #E6F5F4;
  --color-light-bg: #F3F7FA;
  --color-body-text: #243448;
  --color-secondary-text: #64748B;
  --color-border: #DCE5EC;
  --color-border-light: #EDF2F7;
  --color-card-bg: #FFFFFF;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, Cambria, 'Times New Roman', serif;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(13, 32, 56, 0.05);
  --shadow-md: 0 4px 14px rgba(13, 32, 56, 0.08);
  --shadow-lg: 0 12px 30px rgba(13, 32, 56, 0.12);
  --shadow-xl: 0 20px 45px rgba(13, 32, 56, 0.16);

  /* Transitions */
  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-max-width: 1240px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-body-text);
  background-color: var(--color-white);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary-navy);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.serif-heading {
  font-family: var(--font-serif);
  letter-spacing: -0.01em;
}

p {
  color: var(--color-body-text);
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

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

a:hover {
  color: var(--color-teal-hover);
}

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

table {
  max-width: 100%;
  border-collapse: collapse;
}

pre, code {
  max-width: 100%;
  word-break: break-word;
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 3.5vw, 1.5rem);
  padding-right: clamp(1rem, 3.5vw, 1.5rem);
}

.section {
  padding: 5rem 0;
}

.section-sm {
  padding: 3rem 0;
}

.section-lg {
  padding: 6.5rem 0;
}

.bg-light {
  background-color: var(--color-light-bg);
}

.bg-navy {
  background-color: var(--color-deep-navy);
  color: var(--color-white);
}

.bg-navy h1, .bg-navy h2, .bg-navy h3, .bg-navy h4, .bg-navy p {
  color: var(--color-white);
}

.bg-white {
  background-color: var(--color-white);
}

/* Header & Sticky Navigation */
.topbar {
  background-color: var(--color-deep-navy);
  color: #CBD5E1;
  font-size: 0.825rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar-contact {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.topbar-contact a {
  color: #CBD5E1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.topbar-contact a:hover {
  color: var(--color-teal-accent);
}

.topbar-badge {
  background: rgba(21, 154, 156, 0.25);
  color: var(--color-teal-accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 10px rgba(13, 32, 56, 0.04);
  transition: all var(--transition-fast);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 74px;
}

.header-brand {
  display: flex;
  align-items: center;
  transition: opacity var(--transition-fast);
}

.header-brand:hover {
  opacity: 0.92;
}

.header-brand img {
  height: 52px;
  width: auto;
  display: block;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-list {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 0.35rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--color-primary-navy);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-teal);
  background-color: var(--color-light-teal);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 320px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: 0.75rem 0;
  margin-top: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 1010;
  list-style: none;
}

.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: 0.65rem 1.25rem;
  color: var(--color-body-text);
  font-size: 0.885rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.dropdown-link strong {
  display: block;
  color: var(--color-primary-navy);
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.dropdown-link span {
  font-size: 0.775rem;
  color: var(--color-secondary-text);
}

.dropdown-link:hover {
  background-color: var(--color-light-teal);
  color: var(--color-teal);
  padding-left: 1.5rem;
}

.dropdown-link:hover strong {
  color: var(--color-teal);
}

/* Header CTAs */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Mobile Header Controls & Hamburger */
.mobile-header-controls {
  display: none;
  align-items: center;
  gap: 0.5rem;
}

.btn-mobile-wa {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background-color: #25D366;
  color: #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(37, 211, 102, 0.3);
  transition: transform var(--transition-fast);
  text-decoration: none;
}

.btn-mobile-wa:hover {
  transform: scale(1.05);
  color: #FFFFFF;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-primary-navy);
  cursor: pointer;
  padding: 6px;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.mobile-toggle:hover {
  background: var(--color-light-bg);
}

.hamburger-bar {
  display: block;
  width: 22px;
  height: 2.2px;
  background-color: var(--color-primary-navy);
  border-radius: 2px;
  transition: all 0.25s ease-in-out;
}

.mobile-toggle.active .hamburger-bar:nth-child(1) {
  transform: translateY(7.2px) rotate(45deg);
}

.mobile-toggle.active .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active .hamburger-bar:nth-child(3) {
  transform: translateY(-7.2px) rotate(-45deg);
}

/* Dropdown Chevron rotation on mobile */
.dropdown-chevron {
  transition: transform var(--transition-fast);
}

.nav-item.dropdown-open .dropdown-chevron {
  transform: rotate(180deg);
}

/* Mobile Nav Drawer Components */
.mobile-nav-header {
  display: none;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding-bottom: 1.25rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-logo img {
  height: 34px;
  width: auto;
  display: block;
}

.mobile-nav-close {
  background: var(--color-light-bg);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-primary-navy);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
  background: var(--color-light-teal);
  color: var(--color-teal);
}

.mobile-nav-actions {
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-light);
}

/* Off-canvas Navigation Backdrop */
.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(13, 32, 56, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  cursor: pointer;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.nav-backdrop.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.75rem 1.5rem;
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--color-teal);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(21, 154, 156, 0.28);
}

.btn-primary:hover {
  background-color: var(--color-teal-hover);
  color: var(--color-white);
  box-shadow: 0 6px 18px rgba(21, 154, 156, 0.38);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--color-primary-navy);
  color: var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-deep-navy);
  color: var(--color-white);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-outline-white {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--color-white);
}

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.95rem 2rem;
  font-size: 1.05rem;
}

.btn-whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
}

.btn-whatsapp:hover {
  background-color: #1EBE5D;
  color: #FFFFFF;
  box-shadow: 0 6px 18px rgba(37, 211, 102, 0.3);
}

/* Eyebrows & Section Headers */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--color-teal);
  margin-bottom: 0.75rem;
  padding: 4px 12px;
  background: var(--color-light-teal);
  border-radius: 20px;
}

.eyebrow-dark {
  background: rgba(21, 154, 156, 0.2);
  color: var(--color-teal-accent);
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--color-secondary-text);
  font-size: 1.1rem;
  line-height: 1.6;
}

/* Hero Section */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, #0D2038 0%, #142D4E 65%, #183C68 100%);
  color: var(--color-white);
  padding: 5.5rem 0 6rem 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-headline {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero-supporting {
  color: #DCE5EC;
  font-size: 1.15rem;
  line-height: 1.65;
  margin-bottom: 2rem;
  max-width: 540px;
}

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

.hero-trust-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.5rem;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #94A3B8;
  font-weight: 500;
}

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

.hero-image-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(7, 19, 36, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-image-frame img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}

.hero-badge-float {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: rgba(13, 32, 56, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(45, 212, 191, 0.4);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-badge-float strong {
  display: block;
  font-size: 0.95rem;
  color: #FFFFFF;
}

.hero-badge-float span {
  font-size: 0.8rem;
  color: var(--color-teal-accent);
}

/* Service Cards */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: 2rem;
}

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

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-teal);
}

.service-card-media {
  height: 180px;
  overflow: hidden;
  position: relative;
  background-color: var(--color-deep-navy);
}

.service-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.service-card:hover .service-card-media img {
  transform: scale(1.05);
}

.service-card-icon {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  color: var(--color-teal);
}

.service-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.service-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary-navy);
}

.service-card-text {
  color: var(--color-secondary-text);
  font-size: 0.925rem;
  line-height: 1.55;
  margin-bottom: 1.5rem;
  flex: 1;
}

.service-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-teal);
  transition: gap var(--transition-fast);
}

.service-card-link:hover {
  gap: 10px;
  color: var(--color-teal-hover);
}

/* Why ResearchersDen (Value Principles) */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 2rem;
}

.value-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.75rem;
  transition: all var(--transition-normal);
}

.value-card:hover {
  border-color: var(--color-teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.value-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-light-teal);
  color: var(--color-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.value-title {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.value-desc {
  font-size: 0.925rem;
  color: var(--color-secondary-text);
  line-height: 1.6;
}

/* How It Works (4-Step Process) */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
  gap: 2rem;
  position: relative;
}

.step-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  position: relative;
}

.step-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-light-teal);
  line-height: 1;
  margin-bottom: 1rem;
}

.step-card:hover .step-number {
  color: var(--color-teal);
}

.step-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.885rem;
  color: var(--color-secondary-text);
}

/* Research Domains Grid */
.domains-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr));
  gap: 1.5rem;
}

.domain-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: all var(--transition-fast);
}

.domain-card:hover {
  border-color: var(--color-teal);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.domain-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--color-light-teal);
  color: var(--color-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.domain-content h4 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.domain-content p {
  font-size: 0.85rem;
  color: var(--color-secondary-text);
}

/* Course Catalogue & Cards */
.course-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  justify-content: center;
}

.filter-btn {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 0.5rem 1.25rem;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-body-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--color-teal);
  color: var(--color-white);
  border-color: var(--color-teal);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 2rem;
}

.course-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-teal);
}

.course-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-light-bg);
}

.course-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-teal);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 0.5rem;
}

.course-title {
  font-size: 1.2rem;
  line-height: 1.35;
}

.course-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.825rem;
  color: var(--color-secondary-text);
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-light);
}

.course-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.course-objectives {
  list-style: none;
  margin-bottom: 1.5rem;
  flex: 1;
}

.course-objectives li {
  font-size: 0.875rem;
  color: var(--color-body-text);
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.25rem;
}

.course-objectives li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-teal);
  font-weight: 700;
}

/* FAQ Accordion */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  background: var(--color-white);
  overflow: hidden;
}

.faq-trigger {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary-navy);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.faq-trigger:hover {
  background-color: var(--color-light-bg);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--color-teal);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-content {
  padding: 0 1.5rem 1.5rem 1.5rem;
  display: none;
  font-size: 0.95rem;
  color: var(--color-secondary-text);
  line-height: 1.65;
}

.faq-item.active .faq-content {
  display: block;
}

/* Lead Capture Form */
.enquiry-form-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

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

.form-group label {
  display: block;
  font-size: 0.885rem;
  font-weight: 600;
  color: var(--color-primary-navy);
  margin-bottom: 0.45rem;
}

.form-group label span.required {
  color: #DC2626;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-body-text);
  background-color: var(--color-white);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(21, 154, 156, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

.radio-group {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.radio-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 500;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.825rem;
  color: var(--color-secondary-text);
  cursor: pointer;
  line-height: 1.45;
}

.checkbox-label input[type="checkbox"] {
  margin-top: 3px;
}

.form-error-msg {
  color: #DC2626;
  font-size: 0.8rem;
  margin-top: 4px;
  display: none;
}

.form-group.has-error .form-control {
  border-color: #DC2626;
}

.form-group.has-error .form-error-msg {
  display: block;
}

/* Success Card */
.enquiry-success-box {
  display: none;
  text-align: center;
  padding: 2.5rem 1.5rem;
}

.success-icon-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #D1FAE5;
  color: #059669;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem auto;
}

.ref-code-display {
  display: inline-block;
  background: var(--color-light-teal);
  color: var(--color-primary-navy);
  font-family: monospace;
  font-weight: 800;
  font-size: 1.2rem;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(21, 154, 156, 0.3);
  margin: 1rem 0 1.5rem 0;
}

/* Breadcrumbs */
.breadcrumbs {
  padding: 1.25rem 0;
  font-size: 0.85rem;
  color: var(--color-secondary-text);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--color-border);
}

.breadcrumbs a {
  color: var(--color-secondary-text);
}

.breadcrumbs a:hover {
  color: var(--color-teal);
}

.breadcrumbs li:last-child {
  color: var(--color-primary-navy);
  font-weight: 600;
}

/* Service Inner Layout */
.service-inner-grid {
  display: grid;
  grid-template-columns: 1.7fr 1.1fr;
  gap: 3.5rem;
  align-items: start;
}

.service-main-content h2 {
  font-size: 1.85rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.service-main-content h3 {
  font-size: 1.35rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.service-main-content ul {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.service-main-content li {
  margin-bottom: 0.5rem;
  color: var(--color-body-text);
}

.service-sidebar {
  position: sticky;
  top: 90px;
}

/* Footer */
.site-footer {
  background-color: var(--color-deep-navy);
  color: #94A3B8;
  padding: 5rem 0 2rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  position: relative;
}

.footer-col h4::after {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-teal);
  margin-top: 8px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

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

.footer-links a:hover {
  color: var(--color-teal-accent);
  padding-left: 4px;
}

.footer-contact-list {
  list-style: none;
}

.footer-contact-list li {
  margin-bottom: 1rem;
  font-size: 0.9rem;
  display: flex;
  gap: 10px;
  line-height: 1.45;
}

.footer-contact-list a {
  color: #94A3B8;
}

.footer-contact-list a:hover {
  color: var(--color-teal-accent);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: 0.825rem;
  gap: 1rem;
}

.footer-bottom a {
  color: #94A3B8;
}

.footer-bottom a:hover {
  color: var(--color-teal-accent);
}

.footer-disclaimer {
  max-width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: 2rem;
  font-size: 0.775rem;
  line-height: 1.5;
  color: #64748B;
}

/* Modal Window */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(13, 32, 56, 0.75);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

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

.modal-dialog {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  padding: 2rem 2.25rem 1rem 2.25rem;
}

.modal-body {
  padding: 0 2.25rem 2.25rem 2.25rem;
}

/* Eliminate duplicate padding and outer card border when form is inside modal */
.modal-body .enquiry-form-card {
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--color-light-bg);
  border: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-secondary-text);
  font-size: 1.35rem;
  line-height: 1;
  transition: all var(--transition-fast);
  z-index: 10;
}

.modal-close:hover {
  background: var(--color-light-teal);
  color: var(--color-teal);
}

/* ==========================================================================
   REUSABLE RESPONSIVE LAYOUT CLASSES
   ========================================================================== */

/* Page Hero Grid (used across service pages, about, and courses) */
.page-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: center;
}

.page-hero-title {
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

/* Two-column feature/scope card grid (collapses on mobile) */
.scope-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

/* Two-column consultation/contact grid (collapses on tablets/mobiles) */
.consultation-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 3.5rem;
  align-items: center;
}

/* Related services grid */
.related-services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 1.5rem;
}

/* Domain detail cards grid */
.domain-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 2rem;
}

/* Blog / Resources grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 310px), 1fr));
  gap: 2rem;
}

/* Trust cards grid */
.trust-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 2rem;
}

/* ==========================================================================
   FLOATING ACTION BUTTON (WHATSAPP QUICK ADVISORY)
   ========================================================================== */
.floating-whatsapp {
  position: fixed;
  bottom: 26px;
  right: 26px;
  z-index: 990;
  width: 56px;
  height: 56px;
  background-color: #25D366;
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 18px rgba(37, 211, 102, 0.45);
  transition: all var(--transition-normal);
  text-decoration: none;
}

.floating-whatsapp:hover {
  background-color: #1EBE5D;
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.55);
  color: #FFFFFF;
}

.floating-whatsapp-tooltip {
  position: absolute;
  right: 68px;
  background: var(--color-deep-navy);
  color: #FFFFFF;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(10px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.floating-whatsapp:hover .floating-whatsapp-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES (DESKTOP -> TABLET -> MOBILE)
   ========================================================================== */

/* Medium Desktops & Small Laptops (1025px - 1200px) */
@media (min-width: 1025px) and (max-width: 1200px) {
  .main-nav {
    gap: 0.5rem;
  }
  .nav-list {
    gap: 0.15rem;
  }
  .nav-link {
    font-size: 0.85rem;
    padding: 0.45rem 0.45rem;
  }
  .header-actions {
    gap: 0.4rem;
  }
  .header-actions .btn-sm {
    padding: 0.45rem 0.65rem;
    font-size: 0.8rem;
  }
}

/* 1. Large Tablets & Small Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .hero-headline {
    font-size: 2.5rem;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-image-frame img {
    height: 380px;
  }
  .page-hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .consultation-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .service-inner-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .service-sidebar {
    position: static;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  /* Header transitions to Mobile/Tablet Drawer at 1024px */
  .site-header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .site-header .container {
    height: 68px;
  }
  .header-actions {
    display: none;
  }
  .mobile-header-controls {
    display: flex;
  }
  .mobile-toggle {
    display: flex;
  }

  body.nav-open .site-header {
    z-index: 1050;
    pointer-events: none;
    background: transparent;
    border-bottom-color: transparent;
    box-shadow: none;
  }

  body.nav-open .site-header .container > :not(.main-nav) {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
  }

  body.nav-open .main-nav {
    pointer-events: auto;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(340px, 86vw);
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    overflow-y: auto;
    box-shadow: -10px 0 35px rgba(13, 32, 56, 0.15);
    z-index: 1050;
    transform: translateX(100%);
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
  }
  .main-nav.active {
    transform: translateX(0);
  }

  .mobile-nav-header {
    display: flex;
  }
  .mobile-nav-actions {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
  }
  .nav-item {
    width: 100%;
    border-bottom: 1px solid var(--color-border-light);
  }
  .nav-link {
    width: 100%;
    padding: 0.95rem 0.5rem;
    font-size: 1rem;
    justify-content: space-between;
  }
  .dropdown-menu {
    position: static;
    width: 100%;
    box-shadow: none;
    border: none;
    background: var(--color-light-bg);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.5rem;
    margin: 0 0 0.75rem 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }
  .nav-item.dropdown-open .dropdown-menu {
    display: block;
  }
  .dropdown-link {
    padding: 0.55rem 0.75rem;
    border-radius: var(--radius-sm);
  }
  .dropdown-link:hover {
    padding-left: 0.75rem;
  }
}

/* 2. Standard Tablets & Mobile Landscape (<= 768px) */
@media (max-width: 768px) {
  .topbar {
    display: none;
  }
  .site-header .container {
    height: 64px;
  }
  .header-brand img {
    height: 38px;
  }
  .hero-headline {
    font-size: 2rem;
  }
  .section {
    padding: 3.5rem 0;
  }
  .section-sm {
    padding: 2.5rem 0;
  }
  .section-lg {
    padding: 4.5rem 0;
  }
  .section-title {
    font-size: 1.85rem;
  }
  .section-header {
    margin-bottom: 2.5rem;
  }

  .scope-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .form-row {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .enquiry-form-card {
    padding: 1.75rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.25rem;
    margin-bottom: 2.5rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  .footer-bottom div:last-child {
    justify-content: center;
  }
}

/* 3. Mobile Phones (<= 576px) */
@media (max-width: 576px) {
  .site-header .container {
    height: 60px;
  }
  .header-brand img {
    height: 34px;
  }

  .page-hero-title {
    font-size: 1.75rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
  .section-subtitle {
    font-size: 0.95rem;
  }

  .service-card-body,
  .course-header,
  .course-body,
  .value-card,
  .step-card,
  .domain-card {
    padding: 1.25rem;
  }

  .enquiry-form-card {
    padding: 1.25rem;
    border-radius: var(--radius-md);
  }

  .radio-group {
    flex-direction: column;
    gap: 0.6rem;
  }

  /* Modal on Mobile */
  .modal-overlay {
    padding: 0.5rem;
  }
  .modal-dialog {
    max-height: 94vh;
    border-radius: var(--radius-md);
  }
  .modal-header {
    padding: 1.5rem 1.25rem 0.75rem 1.25rem;
  }
  .modal-body {
    padding: 0 1.25rem 1.5rem 1.25rem;
  }
  .modal-close {
    top: 0.75rem;
    right: 0.75rem;
    width: 32px;
    height: 32px;
    font-size: 1.15rem;
  }

  /* Floating WhatsApp */
  .floating-whatsapp {
    bottom: 18px;
    right: 18px;
    width: 50px;
    height: 50px;
  }
  .floating-whatsapp svg {
    width: 24px;
    height: 24px;
  }
  .floating-whatsapp-tooltip {
    display: none;
  }
}

/* 4. Small Mobile Phones (<= 380px) */
@media (max-width: 380px) {
  .header-brand img {
    height: 30px;
  }
  .btn {
    padding: 0.7rem 1.15rem;
    font-size: 0.875rem;
  }
  .enquiry-form-card {
    padding: 1rem 0.85rem;
  }
  .course-meta {
    gap: 0.5rem;
    font-size: 0.775rem;
  }
}

/* Reduced Motion Accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}