/* ==========================================================================
   BEYOND NEXUS (bydnx.com) - Official Stylesheet (Light Premium Theme)
   Tagline: Learn. Dream. Build.
   
   Structure:
   1.  Variables (:root design tokens - Light Theme)
   2.  Reset & Base Defaults
   3.  Typography & Editorial Hierarchy
   4.  Global Components (Buttons, Badges, Containers, Utilities)
   5.  Navbar & Header (Sticky White Glassmorphism, Mobile Drawer)
   6.  Hero Section & Nexus Connection Storytelling Visual
   7.  Sections & Editorial Layouts
   8.  Pillars, Services & Surfaces (Reduced Card Clutter)
   9.  Workplace (Tier Comparison, Curriculum Tracks)
   10. Forms & Authentication (Inputs, Validation, Clean Auth Card)
   11. Footer
   12. Responsive Design (Media Queries & Reduced Motion)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES
   -------------------------------------------------------------------------- */
:root {
  /* Surfaces & Backgrounds */
  --color-background: #FFFFFF;
  --color-background-soft: #F8FAFC;
  --color-background-section: #F1F5F9;
  --color-background-glass: rgba(255, 255, 255, 0.92);

  /* Primary Navy Palette */
  --color-primary: #0B1020;
  --color-primary-soft: #1E293B;

  /* Vibrant Accents */
  --color-accent: #2563EB;
  --color-accent-light: #3B82F6;
  --color-accent-subtle: rgba(37, 99, 235, 0.08);

  /* Typography Colors */
  --color-text: #0F172A;
  --color-text-secondary: #64748B;
  --color-text-muted: #94A3B8;
  --color-text-inverse: #FFFFFF;

  /* Borders & Dividers */
  --color-border: #E2E8F0;
  --color-border-subtle: #F1F5F9;
  --color-border-hover: #CBD5E1;

  /* Feedback */
  --color-success: #10B981;
  --color-success-subtle: rgba(16, 185, 129, 0.1);

  /* Shadows (Soft, refined, executive) */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.08), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  --shadow-accent: 0 4px 20px rgba(37, 99, 235, 0.18);

  /* Typography Settings */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Layout & Spacing */
  --container-max: 1200px;
  --container-narrow: 840px;
  --nav-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. RESET & BASE DEFAULTS
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1 0 auto;
}

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

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   3. TYPOGRAPHY & EDITORIAL HIERARCHY
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw + 1rem, 4.4rem);
  font-weight: 700;
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(2rem, 3vw + 0.5rem, 2.75rem);
  letter-spacing: -0.025em;
}

h3 {
  font-size: clamp(1.35rem, 2vw + 0.25rem, 1.75rem);
}

h4 {
  font-size: 1.2rem;
  font-weight: 600;
}

p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.text-lead {
  font-size: clamp(1.15rem, 1.5vw + 0.5rem, 1.35rem);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.text-center {
  text-align: center;
}

.text-accent {
  color: var(--color-accent);
}

.text-navy {
  color: var(--color-primary);
}

.text-muted {
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   4. GLOBAL COMPONENTS
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.75rem;
  padding-right: 1.75rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.75rem;
  padding-right: 1.75rem;
}

/* Badges / Overlines */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-accent-subtle);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--color-accent);
  width: fit-content;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.badge-secondary {
  background: var(--color-background-section);
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(11, 16, 32, 0.2);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-soft);
  box-shadow: 0 6px 20px rgba(11, 16, 32, 0.3);
  transform: translateY(-1px);
}

.btn-primary:active {
  background-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(11, 16, 32, 0.25);
  transform: translateY(1px);
}

.btn-secondary {
  background: var(--color-background);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-background-soft);
  border-color: var(--color-border-hover);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-secondary:active {
  background: var(--color-background-section);
  border-color: var(--color-border);
  transform: translateY(1px);
  box-shadow: none;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.btn-outline:active {
  background: rgba(37, 99, 235, 0.15);
  transform: translateY(1px);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #FFFFFF;
  box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
  background-color: var(--color-accent-light);
  transform: translateY(-1px);
}

.btn-accent:active {
  background-color: var(--color-accent);
  transform: translateY(1px);
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   5. NAVBAR & HEADER
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
  background-color: var(--color-background-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Brand Logo (Seamless, un-boxed, authentic) */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  line-height: normal;
  text-decoration: none;
  margin: 0;
  padding: 0;
  flex-shrink: 0;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.brand-logo:hover {
  opacity: 0.88;
}

.brand-logo:active {
  opacity: 0.75;
  transform: scale(0.99);
}

.site-logo-img {
  height: 38px;
  width: auto;
  max-height: 100%;
  display: block;
  object-fit: contain;
  vertical-align: middle;
}

.footer-logo-img {
  height: 42px;
}

/* Navigation Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

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

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

/* Nav Actions (Right) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-background-soft);
  border: 1px solid var(--color-border);
  gap: 5px;
  padding: 8px;
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-toggle.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.mobile-toggle.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  width: 100%;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--shadow-lg);
  z-index: 999;
}

.mobile-drawer.open {
  display: flex;
}

.mobile-drawer .nav-link {
  font-size: 1.15rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.mobile-drawer .nav-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 1rem;
  width: 100%;
}

.mobile-drawer .nav-actions .btn {
  display: inline-flex;
  width: 100%;
}

/* --------------------------------------------------------------------------
   6. HERO SECTION & NEXUS CONNECTION STORYTELLING VISUAL
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding: clamp(4rem, 7vw, 6.5rem) 0 clamp(3rem, 5vw, 4.5rem);
  background-color: var(--color-background);
  overflow: hidden;
}

.hero-grid-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}

.hero-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge {
  margin-bottom: 1.5rem;
}

.hero-headline {
  font-size: clamp(2.75rem, 5vw + 0.5rem, 4.4rem);
  line-height: 1.08;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
}

.hero-supporting-text {
  font-size: clamp(1.15rem, 1.5vw + 0.25rem, 1.35rem);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 2.25rem;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Right Side: Nexus Connection Canvas */
.nexus-visual-container {
  position: relative;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
  background: var(--color-background-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-image: radial-gradient(#CBD5E1 1px, transparent 1px);
  background-size: 24px 24px;
}

.nexus-connection-canvas {
  width: 100%;
  height: 100%;
}

/* Connecting lines */
.nexus-line {
  stroke: #CBD5E1;
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
}

.nexus-line-active {
  stroke: var(--color-accent);
  stroke-width: 2;
  opacity: 0.6;
}

/* Connection Nodes */
.nexus-node {
  transition: transform var(--transition-normal);
}

.nexus-node circle.node-bg {
  fill: #FFFFFF;
  stroke: var(--color-border);
  stroke-width: 1.5;
  filter: drop-shadow(0 2px 6px rgba(15, 23, 42, 0.08));
}

.nexus-node circle.node-dot {
  fill: var(--color-accent);
}

.nexus-node text {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  fill: var(--color-primary);
  text-anchor: middle;
}

/* Central Nexus Emblem */
.nexus-center-emblem {
  transform-origin: center;
  transition: transform var(--transition-normal);
}

/* Elegant Animation Logic (Connecting into a Nexus) */
@keyframes nexusAppear {
  0% {
    opacity: 0;
    transform: scale(0.92);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes lineFlow {
  0% {
    stroke-dashoffset: 24;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

.nexus-connection-canvas {
  animation: nexusAppear 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.nexus-line-active {
  animation: lineFlow 3s linear infinite;
}

/* Page Hero for Inner Pages */
.page-hero {
  padding: clamp(3.5rem, 6vw, 5.5rem) 0 clamp(2.5rem, 4vw, 3.5rem);
  text-align: center;
  background-color: var(--color-background-soft);
  border-bottom: 1px solid var(--color-border);
}

.page-hero-content {
  max-width: 780px;
  margin: 0 auto;
}

.page-hero h1 {
  margin-top: 1rem;
  margin-bottom: 1.25rem;
}

/* --------------------------------------------------------------------------
   7. SECTIONS & EDITORIAL LAYOUTS
   -------------------------------------------------------------------------- */
.section {
  padding: clamp(4.5rem, 7vw, 6.5rem) 0;
  position: relative;
}

.section-soft {
  background-color: var(--color-background-soft);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-header.text-center {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.section-header .badge {
  margin-bottom: 1rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

/* Split layout (2 columns) */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}

/* --------------------------------------------------------------------------
   8. PILLARS, SERVICES & SURFACES (REDUCED CARD CLUTTER)
   -------------------------------------------------------------------------- */
/* Editorial 3-Pillars Columns */
.pillars-editorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.pillar-col {
  display: flex;
  flex-direction: column;
  padding-top: 1.5rem;
  border-top: 2px solid var(--color-border);
  transition: border-color var(--transition-normal);
}

.pillar-col:hover {
  border-top-color: var(--color-accent);
}

.pillar-col-number {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.pillar-col-title {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
}

.pillar-col-desc {
  font-size: 0.98rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.pillar-col-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

.pillar-col-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--color-background-section);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

/* Editorial Services Grid */
.services-editorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-item {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.service-item:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  border: 1px solid rgba(37, 99, 235, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.service-icon svg {
  width: 22px;
  height: 22px;
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
}

.service-desc {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.service-meta-list {
  margin: 0.5rem 0 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.service-meta-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

.service-meta-row svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
}

.service-link:hover {
  color: var(--color-primary);
}

.service-link svg {
  width: 15px;
  height: 15px;
  transition: transform var(--transition-fast);
}

.service-link:hover svg {
  transform: translateX(3px);
}

/* Feature List (About & Editorial) */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1.75rem;
}

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

.feature-icon-small {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-subtle);
  border: 1px solid rgba(37, 99, 235, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.feature-icon-small svg {
  width: 16px;
  height: 16px;
}

.feature-item h4 {
  margin-bottom: 0.25rem;
  font-size: 1.05rem;
}

.feature-item p {
  font-size: 0.95rem;
  line-height: 1.55;
}

/* Light Surface Mockup Box */
.terminal-surface {
  background: var(--color-background-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.terminal-header {
  background: var(--color-background-section);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #CBD5E1;
}

.terminal-title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-left: 0.5rem;
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 1.5rem;
  font-family: 'JetBrains Mono', Consolas, Monaco, monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-primary-soft);
}

.terminal-body .code-accent {
  color: var(--color-accent);
  font-weight: 600;
}

.terminal-body .code-primary {
  color: var(--color-primary);
  font-weight: 600;
}

.terminal-body .code-comment {
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   9. WORKPLACE
   -------------------------------------------------------------------------- */
.workplace-tiers {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.tier-card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.tier-card.featured {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg), var(--shadow-accent);
}

.tier-card:hover {
  transform: translateY(-2px);
}

.tier-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
}

.tier-name {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.tier-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

.tier-price {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 2rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.tier-price-period {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.tier-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.tier-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

.tier-feature-icon {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.tier-feature-item.muted {
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.tier-feature-item.muted .tier-feature-icon {
  color: var(--color-text-muted);
}

/* Workplace Curriculum Track Cards */
.track-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.track-card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.track-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.track-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.track-title {
  font-size: 1.1rem;
  line-height: 1.35;
  color: var(--color-primary);
}

.track-details {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   10. FORMS & AUTHENTICATION
   -------------------------------------------------------------------------- */
.auth-wrapper {
  min-height: calc(100vh - var(--nav-height) - 100px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
  background-color: var(--color-background-soft);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 3rem);
  box-shadow: var(--shadow-md);
  position: relative;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo-img {
  max-width: 160px;
  height: auto;
  margin: 0 auto 1.25rem;
  display: block;
}

.auth-header h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.auth-header p {
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

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

.form-row-split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
}

.form-checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
}

.form-checkbox {
  accent-color: var(--color-accent);
  width: 16px;
  height: 16px;
  border-radius: 4px;
}

.form-link {
  color: var(--color-accent);
  font-weight: 500;
}

.form-link:hover {
  text-decoration: underline;
  color: var(--color-primary);
}

.auth-footer {
  text-align: center;
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* Form Alert Banner */
.form-feedback {
  display: none;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
  border: 1px solid transparent;
}

.form-feedback.success {
  display: block;
  background: var(--color-success-subtle);
  border-color: rgba(16, 185, 129, 0.3);
  color: #065F46;
}

.form-feedback.info {
  display: block;
  background: var(--color-accent-subtle);
  border-color: rgba(37, 99, 235, 0.25);
  color: var(--color-accent);
}

/* Contact Specific Layout */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}

.contact-info-card {
  background: var(--color-background-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.contact-channel-list {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  margin-top: 2rem;
}

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

.contact-channel-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  border: 1px solid rgba(37, 99, 235, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-channel-icon svg {
  width: 20px;
  height: 20px;
}

.contact-channel-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.contact-channel-value {
  font-size: 1.05rem;
  color: var(--color-primary);
  font-weight: 600;
}

.contact-channel-value:hover {
  color: var(--color-accent);
}

.contact-form-card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: var(--shadow-sm);
}

/* --------------------------------------------------------------------------
   11. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-background-soft);
  border-top: 1px solid var(--color-border);
  padding: 4.5rem 0 2.5rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.75fr repeat(3, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: 3.5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 340px;
}

.footer-tagline {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-column-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-legal-link:hover {
  color: var(--color-primary);
}

/* Call to Action Banner (Light & Executive) */
.cta-banner {
  background: var(--color-background-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(3rem, 6vw, 4.5rem);
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.cta-banner h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
}

.cta-banner p {
  max-width: 620px;
  margin: 0 auto 2rem;
}

.cta-banner-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   12. RESPONSIVE DESIGN & ACCESSIBILITY
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-left {
    align-items: center;
    text-align: center;
  }

  .hero-supporting-text {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .nexus-visual-container {
    max-width: 440px;
  }

  .pillars-editorial-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .services-editorial-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .track-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  :root {
    --nav-height: 68px;
  }

  .nav-menu,
  .nav-container .nav-actions .btn {
    display: none;
  }

  .site-logo-img {
    height: 34px;
  }

  .mobile-toggle {
    display: flex;
  }

  .pillars-editorial-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .services-editorial-grid {
    grid-template-columns: 1fr;
  }

  .workplace-tiers {
    grid-template-columns: 1fr;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .footer-legal-links {
    justify-content: center;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .site-logo-img {
    height: 30px;
  }

  .container,
  .container-narrow {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .service-item,
  .tier-card,
  .contact-info-card,
  .contact-form-card,
  .auth-card {
    padding: 1.5rem;
  }

  .cta-banner {
    padding: 2.5rem 1.25rem;
  }

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

/* Reduced Motion Support */
@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;
  }
}