/* ==========================================================================
   QUANTUM DIGITAL SOLUTIONS STUDIO — DESIGN SYSTEM (MONOCHROME PRECISION)
   Swiss Modernism & Architectural Precision Engine
   ========================================================================== */

:root {
  /* Color Palette */
  --canvas: #ffffff;
  --bg-page: #f9f9f9;
  --surface-low: #f4f4f5;
  --surface-mid: #eeeeee;
  --surface-high: #e8e8e8;
  --border-delicate: #e4e4e7;
  --border-intense: #18181b;
  --border-muted: #d4d4d8;
  --text-primary: #0a0a0a;
  --text-secondary: #71717a;
  --text-tertiary: #a1a1aa;
  --pitch: #000000;
  --pure-white: #ffffff;
  
  /* State Colors */
  --color-error: #ba1a1a;
  --color-error-bg: #fff1f2;
  --color-success: #15803d;
  --color-success-bg: #f0fdf4;
  --focus-ring: #0a0a0a;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout & Spacing */
  --container-max: 1280px;
  --gutter: 2rem;
  --header-height: 72px;

  /* Transitions */
  --ease-fast: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 160ms;
}

/* Mobile gutter override */
@media (max-width: 767px) {
  :root {
    --gutter: 1.25rem;
    --header-height: 64px;
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 1rem;
  }
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  scroll-behavior: smooth;
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background-color: var(--bg-page);
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

/* Selection */
::selection {
  background-color: var(--pitch);
  color: var(--pure-white);
}

/* Links & Media */
a {
  color: inherit;
  text-decoration: none;
}

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* Section Containers */
.section {
  padding-top: 5rem;
  padding-bottom: 5rem;
  border-bottom: 1px solid var(--border-delicate);
}

@media (max-width: 767px) {
  .section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
}

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-delicate);
  z-index: 100;
  transition: background-color var(--duration-fast) var(--ease-fast), border-color var(--duration-fast) var(--ease-fast);
}

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

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo-svg {
  height: 32px;
  width: auto;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding-left: 0.75rem;
  border-left: 1px solid var(--border-delicate);
  display: inline-block;
}

@media (max-width: 480px) {
  .brand-badge {
    display: none;
  }
}

/* Desktop Nav */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration-fast) ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--pitch);
  transition: width var(--duration-fast) var(--ease-fast);
}

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

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.875rem 1.75rem;
  border-radius: 0;
  cursor: pointer;
  text-align: center;
  transition: all var(--duration-fast) var(--ease-fast);
  white-space: nowrap;
  line-height: 1;
}

.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.6875rem;
}

.btn-primary {
  background-color: var(--pitch);
  color: var(--pure-white);
  border: 1px solid var(--pitch);
}

.btn-primary:hover {
  background-color: var(--border-intense);
  outline: 1px solid var(--pitch);
  outline-offset: 3px;
}

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

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

.btn-secondary:hover {
  background-color: var(--pitch);
  color: var(--pure-white);
}

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

.btn .icon-arrow {
  transition: transform var(--duration-fast) var(--ease-fast);
}

.btn:hover .icon-arrow {
  transform: translateX(4px);
}

/* Hamburger Button */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-delicate);
  width: 44px;
  height: 44px;
  padding: 0;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: border-color var(--duration-fast) ease, background-color var(--duration-fast) ease;
}

.menu-toggle:hover {
  border-color: var(--pitch);
  background-color: var(--surface-low);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--duration-fast) ease, opacity var(--duration-fast) ease;
}

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

.menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

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

/* Mobile Navigation Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-delicate);
  padding: 2rem var(--gutter);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 240ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 200ms ease, visibility 240ms;
  z-index: 99;
}

.mobile-nav-drawer.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 1rem;
}

.mobile-nav-link {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-delicate);
  padding-bottom: 1rem;
  transition: color var(--duration-fast) ease;
}

.mobile-nav-link span.mono-index {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--pitch);
}

.mobile-nav-footer {
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Responsive Menu Switch */
@media (max-width: 860px) {
  .desktop-nav {
    display: none;
  }
  .header-actions .btn-quote-desktop {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
}

/* Main Content Padding for Fixed Header */
main {
  padding-top: var(--header-height);
}

/* HERO SECTION */
.hero-section {
  background-color: var(--pure-white);
  border-bottom: 1px solid var(--border-delicate);
  padding-top: 5rem;
  padding-bottom: 5rem;
  position: relative;
}

@media (max-width: 767px) {
  .hero-section {
    padding-top: 3rem;
    padding-bottom: 3.5rem;
  }
}

/* Studio Status Pill */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.875rem;
  border: 1px solid var(--border-delicate);
  background-color: var(--canvas);
  margin-bottom: 2rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--pitch);
  position: relative;
}

.pulse-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.25);
  animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.8); opacity: 0.8; }
  50% { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(0.8); opacity: 0; }
}

.status-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.hero-headline {
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: var(--pitch);
  max-width: 1080px;
  margin-bottom: 1.5rem;
}

.hero-subheading {
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 2.75rem;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

@media (max-width: 540px) {
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    margin-bottom: 3rem;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
}

/* Metrics Bar */
.metrics-strip {
  border-top: 1px solid var(--border-delicate);
  padding-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.metric-item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
}

.metric-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--pitch);
  line-height: 1.4;
  white-space: nowrap;
}

.metric-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

@media (max-width: 860px) {
  .metrics-strip {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .metric-item {
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-delicate);
  }
  .metric-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
}

/* SECTION HEADERS */
.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-delicate);
}

.section-pretitle {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--pitch);
}

.section-lead {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 440px;
  line-height: 1.6;
}

@media (max-width: 767px) {
  .section-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
  }
}

/* SERVICES SECTION */
.services-section {
  background-color: var(--bg-page);
}

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

@media (max-width: 860px) {
  .services-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.service-card {
  background-color: var(--pure-white);
  border: 1px solid var(--border-delicate);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: border-color var(--duration-fast) var(--ease-fast), box-shadow var(--duration-fast) var(--ease-fast);
}

@media (max-width: 600px) {
  .service-card {
    padding: 1.75rem 1.25rem;
  }
}

.service-card:hover {
  border-color: var(--pitch);
  box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.04);
}

.service-card-compact {
  padding: 1.75rem;
}

@media (max-width: 600px) {
  .service-card-compact {
    padding: 1.25rem 1rem;
  }
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.card-icon-box {
  width: 48px;
  height: 48px;
  border: 1px solid var(--border-delicate);
  background-color: var(--bg-page);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--duration-fast) ease, color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.service-card:hover .card-icon-box {
  background-color: var(--pitch);
  color: var(--pure-white);
  border-color: var(--pitch);
}

.pillar-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.card-heading {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--pitch);
  margin-bottom: 1rem;
}

.card-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.card-features {
  list-style: none;
  border-top: 1px solid var(--border-delicate);
  padding-top: 1.5rem;
  margin-bottom: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.check-icon {
  width: 18px;
  height: 18px;
  stroke: var(--pitch);
  stroke-width: 2.2;
  fill: none;
  flex-shrink: 0;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pitch);
  margin-top: auto;
  transition: transform var(--duration-fast) ease;
}

.card-link svg {
  transition: transform var(--duration-fast) var(--ease-fast);
}

.service-card:hover .card-link svg {
  transform: translateX(6px);
}

/* WHY US SECTION */
.why-us-section {
  background-color: var(--pure-white);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border-delicate);
}

@media (max-width: 860px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
}

.why-col {
  padding: 3rem 2.25rem;
  border-right: 1px solid var(--border-delicate);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--pure-white);
  transition: background-color var(--duration-fast) ease;
}

@media (max-width: 860px) {
  .why-col {
    border-right: none;
    border-bottom: 1px solid var(--border-delicate);
    padding: 2.25rem 1.5rem;
  }
  .why-col:last-child {
    border-bottom: none;
  }
}

.why-col:last-child {
  border-right: none;
}

.why-col:hover {
  background-color: var(--surface-low);
}

.why-number {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1;
  color: var(--border-muted);
  margin-bottom: 2rem;
  user-select: none;
  font-family: var(--font-sans);
  letter-spacing: -0.04em;
  transition: color var(--duration-fast) ease;
}

.why-col:hover .why-number {
  color: var(--pitch);
}

.why-title {
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--pitch);
  margin-bottom: 0.75rem;
}

.why-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* CONTACT SECTION */
.contact-section {
  background-color: var(--bg-page);
}

/* Responsive Grid & Split Layouts */
.contact-layout,
.split-layout-reverse {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 3.5rem;
  align-items: start;
}

.split-layout {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 3.5rem;
  align-items: start;
}

@media (max-width: 960px) {
  .contact-layout,
  .split-layout,
  .split-layout-reverse {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 600px) {
  .contact-layout,
  .split-layout,
  .split-layout-reverse {
    gap: 2rem;
  }
}

.grid-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (max-width: 767px) {
  .grid-2col {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

.grid-4col-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

@media (max-width: 860px) {
  .grid-4col-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
}

@media (max-width: 380px) {
  .grid-4col-metrics {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
}

.contact-info-col {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-header {
  margin-bottom: 2rem;
}

.contact-headline {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--pitch);
  margin-bottom: 1.25rem;
}

.contact-subtext {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 480px;
}

.contact-meta-list {
  border-top: 1px solid var(--border-delicate);
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.meta-icon-wrapper {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-delicate);
  background-color: var(--pure-white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.meta-icon-wrapper svg {
  width: 18px;
  height: 18px;
  stroke: var(--pitch);
  fill: none;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  display: block;
}

.meta-value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
}

.meta-value a:hover {
  text-decoration: underline;
}

/* Info Panel Card */
.contact-info-panel {
  background-color: var(--pure-white);
  border: 1px solid var(--border-delicate);
  padding: 2.25rem;
}

@media (max-width: 600px) {
  .contact-info-panel {
    padding: 1.5rem 1.25rem;
  }
}

/* Form Card */
.contact-form-card {
  background-color: var(--pure-white);
  border: 1px solid var(--border-delicate);
  padding: 2.75rem;
}

@media (max-width: 600px) {
  .contact-form-card {
    padding: 1.5rem 1.25rem;
  }
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Service Selector Tabs */
.scope-selector-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.scope-options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

@media (max-width: 480px) {
  .scope-options-grid {
    grid-template-columns: 1fr;
  }
}

.scope-btn {
  background: transparent;
  border: 1px solid var(--border-delicate);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.75rem 0.5rem;
  cursor: pointer;
  text-align: center;
  transition: all var(--duration-fast) ease;
}

.scope-btn:hover {
  border-color: var(--pitch);
}

.scope-btn.is-active {
  background-color: var(--pitch);
  color: var(--pure-white);
  border-color: var(--pitch);
}

/* Form Inputs */
.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  position: relative;
}

.input-control {
  width: 100%;
  background-color: var(--pure-white);
  border: 1px solid var(--border-delicate);
  border-radius: 0;
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  color: var(--text-primary);
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.input-control::placeholder {
  color: var(--text-tertiary);
}

.input-control:focus {
  outline: none;
  border-color: var(--border-intense);
  box-shadow: 0 0 0 1px var(--border-intense);
}

.input-control.has-error {
  border-color: var(--color-error);
  background-color: var(--color-error-bg);
}

.field-error-msg {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-error);
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.field-error-msg.visible {
  display: flex;
}

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

.btn-submit {
  width: 100%;
  padding: 1.125rem;
  margin-top: 0.5rem;
}

/* Submission Result States */
.form-success-banner {
  display: none;
  background-color: var(--surface-low);
  border: 1px solid var(--border-delicate);
  padding: 2.5rem 1.5rem;
  text-align: center;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.form-success-banner.visible {
  display: flex;
}

.success-icon-box {
  width: 48px;
  height: 48px;
  background-color: var(--pitch);
  color: var(--pure-white);
  display: flex;
  align-items: center;
  justify-content: center;
}

.success-icon-box svg {
  width: 24px;
  height: 24px;
  stroke: var(--pure-white);
  stroke-width: 2.5;
  fill: none;
}

.success-title {
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  color: var(--pitch);
}

.success-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 380px;
  line-height: 1.5;
}

/* FOOTER */
.site-footer {
  background-color: var(--pure-white);
  border-top: 1px solid var(--border-delicate);
  padding-top: 4.5rem;
  padding-bottom: 3rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 5fr 3fr 4fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border-delicate);
}

@media (max-width: 860px) {
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 340px;
  line-height: 1.6;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: block;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-nav-list a {
  font-size: 0.875rem;
  color: var(--text-primary);
  transition: color var(--duration-fast) ease;
}

.footer-nav-list a:hover {
  color: var(--text-secondary);
  text-decoration: underline;
}

.social-icons-group {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-delicate);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  background-color: var(--pure-white);
  transition: all var(--duration-fast) ease;
}

.social-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.social-link:hover {
  background-color: var(--pitch);
  color: var(--pure-white);
  border-color: var(--pitch);
  transform: translateY(-2px);
}

.footer-bottom-bar {
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy, .footer-location {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

@media (max-width: 600px) {
  .footer-bottom-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   MULTI-PAGE EXTENSIONS & INTERACTIVE MODULES
   ========================================================================== */

/* Technical Status Marquee Ribbon */
.tech-ribbon {
  width: 100%;
  background-color: var(--surface-low);
  border-bottom: 1px solid var(--border-delicate);
  padding: 0.625rem 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.tech-ribbon .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.ribbon-items {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.ribbon-item-active {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
  font-weight: 600;
}

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

/* Sticky Sub-Navigation Bar */
.sticky-nav-bar {
  width: 100%;
  background-color: var(--canvas);
  border-bottom: 1px solid var(--border-delicate);
  position: sticky;
  top: var(--header-height);
  z-index: 40;
  padding: 0.75rem 0;
}

.sticky-nav-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.sticky-nav-bar .container::-webkit-scrollbar {
  display: none;
}

.jump-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 640px) {
  .jump-links {
    gap: 1rem;
    font-size: 0.6875rem;
  }
}

.jump-links a {
  color: var(--text-secondary);
  transition: color var(--duration-fast) ease;
  padding: 0.25rem 0;
}

.jump-links a:hover {
  color: var(--pitch);
  text-decoration: underline;
}

/* Page Header Hero Banner */
.page-header-banner {
  background-color: var(--pure-white);
  border-bottom: 1px solid var(--border-delicate);
  padding: 5rem 0;
}

@media (max-width: 767px) {
  .page-header-banner {
    padding: 3rem 0;
  }
}

@media (max-width: 480px) {
  .page-header-banner {
    padding: 2.25rem 0;
  }
}

/* Telemetry & Metric Highlights Box */
.telemetry-card {
  background-color: var(--pure-white);
  border: 1px solid var(--border-delicate);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (max-width: 480px) {
  .telemetry-card {
    padding: 1.25rem 1rem;
    gap: 1rem;
  }
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-delicate);
  padding-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.telemetry-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.telemetry-stat-val {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--pitch);
  line-height: 1;
}

@media (max-width: 480px) {
  .telemetry-stat-val {
    font-size: clamp(1.35rem, 5vw, 1.75rem);
  }
}

.telemetry-stat-lbl {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-top: 0.35rem;
  display: block;
}

.telemetry-footer {
  background-color: var(--surface-low);
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border-delicate);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Founding Tenet Highlight Card */
.founding-tenet-card {
  background-color: var(--pitch);
  color: var(--pure-white);
  padding: 1.75rem;
  border: 1px solid var(--border-intense);
}

@media (max-width: 480px) {
  .founding-tenet-card {
    padding: 1.25rem 1rem;
  }
}

/* Code Architectural Blueprint Box */
.code-blueprint-box {
  background-color: var(--pitch);
  color: var(--pure-white);
  border: 1px solid var(--border-intense);
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (max-width: 600px) {
  .code-blueprint-box {
    padding: 1.125rem 0.875rem;
  }
}

.code-blueprint-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 0.5rem;
  font-size: 0.6875rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.code-blueprint-body {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  line-height: 1.6;
  font-size: 0.8125rem;
  color: #e4e4e7;
}

@media (max-width: 480px) {
  .code-blueprint-body {
    font-size: 0.725rem;
  }
}

.code-blueprint-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 0.5rem;
  font-size: 0.6875rem;
  color: var(--text-tertiary);
}

/* Lighthouse & Performance Card */
.lighthouse-card {
  background-color: var(--pure-white);
  border: 1px solid var(--border-delicate);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.lighthouse-rings-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  text-align: center;
}

@media (max-width: 480px) {
  .lighthouse-rings-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ring-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--pitch);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  margin: 0 auto;
}

.ring-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  display: block;
}

.vitals-table {
  border-top: 1px solid var(--border-delicate);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.vitals-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

@media (max-width: 520px) {
  .vitals-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
    padding: 0.5rem 0;
  }
}

.vitals-row:last-child {
  border-bottom: none;
}

/* Badge Cloud */
.badge-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-badge {
  padding: 0.35rem 0.75rem;
  background-color: var(--surface-low);
  border: 1px solid var(--border-delicate);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--text-primary);
}

/* Case Mini Banner */
.case-mini-banner {
  padding: 1.25rem;
  background-color: var(--surface-low);
  border: 1px solid var(--border-delicate);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.case-logo-glyph {
  width: 40px;
  height: 40px;
  background-color: var(--pitch);
  color: var(--pure-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-family: var(--font-sans);
  flex-shrink: 0;
}

/* 4-Pillar Bento Grid */
.bento-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

@media (max-width: 860px) {
  .bento-grid-2x2 {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

.bento-card {
  background-color: var(--pure-white);
  border: 1px solid var(--border-delicate);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

@media (max-width: 600px) {
  .bento-card {
    padding: 1.5rem 1.25rem;
  }
}

.bento-card:hover {
  border-color: var(--pitch);
  box-shadow: 0 12px 28px -6px rgba(0, 0, 0, 0.05);
}

.bento-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.bento-title {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--pitch);
  margin-bottom: 0.75rem;
}

.bento-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.bento-footer-spec {
  margin-top: 1.75rem;
  padding: 0.875rem 1rem;
  background-color: var(--surface-low);
  border: 1px solid var(--border-delicate);
}

/* Inverted High-Contrast Stat Band */
.stat-band {
  background-color: var(--pitch);
  color: var(--pure-white);
  padding: 5rem 0;
  border-bottom: 1px solid var(--border-intense);
}

.stat-band-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

@media (max-width: 860px) {
  .stat-band-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .stat-band-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

.stat-band-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stat-band-number {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
}

.stat-band-label {
  font-size: 0.875rem;
  color: #a1a1aa;
  line-height: 1.4;
}

/* FAQ Interactive Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background-color: var(--surface-low);
  border: 1px solid var(--border-delicate);
  transition: background-color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.faq-item.is-active {
  background-color: var(--pure-white);
  border-color: var(--pitch);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  color: var(--pitch);
  cursor: pointer;
}

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  stroke: var(--pitch);
  stroke-width: 2;
  fill: none;
  transition: transform 200ms ease;
  flex-shrink: 0;
}

.faq-item.is-active .faq-icon-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 1.5rem 1.25rem 1.5rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-item.is-active .faq-answer {
  display: block;
}

/* Scoping Matrix Form Controls */
.scoping-grid-archetypes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

@media (max-width: 500px) {
  .scoping-grid-archetypes {
    grid-template-columns: 1fr;
  }
}

.archetype-card-btn {
  background-color: var(--surface-low);
  border: 1px solid var(--border-delicate);
  padding: 1rem;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 84px;
  transition: all var(--duration-fast) ease;
}

.archetype-card-btn:hover {
  border-color: var(--pitch);
}

.archetype-card-btn.is-active {
  background-color: var(--pitch);
  color: var(--pure-white);
  border-color: var(--pitch);
}

.archetype-card-btn.is-active .archetype-index {
  color: #a1a1aa;
}

.archetype-index {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
}

.archetype-title {
  font-size: 0.9375rem;
  font-weight: 600;
}

.scoping-button-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

@media (max-width: 500px) {
  .scoping-button-row {
    grid-template-columns: 1fr;
  }
}

.scoping-toggle-btn {
  background-color: var(--surface-low);
  border: 1px solid var(--border-delicate);
  padding: 0.75rem 0.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--duration-fast) ease;
}

.scoping-toggle-btn:hover {
  border-color: var(--pitch);
}

.scoping-toggle-btn.is-active {
  background-color: var(--pitch);
  color: var(--pure-white);
  border-color: var(--pitch);
}

/* Custom Checkbox */
.custom-checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

.custom-checkbox-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 0.2rem;
  accent-color: var(--pitch);
  border-radius: 0;
  cursor: pointer;
}

/* Direct Channel Atelier List */
.direct-channel-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-delicate);
  padding-bottom: 0.75rem;
}

.direct-channel-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

@media (max-width: 500px) {
  .direct-channel-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

/* Mobile Touch Target Standards & Form Usability */
@media (max-width: 767px) {
  .btn {
    min-height: 48px;
  }
  
  .scoping-toggle-btn {
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .archetype-card-btn {
    min-height: 72px;
  }

  /* Prevent iOS Safari auto-zoom on input focus */
  .input-control,
  input[type="text"],
  input[type="email"],
  textarea,
  select {
    font-size: 16px !important;
  }
}

/* Global Responsive Visibility Utilities */
.hidden {
  display: none !important;
}

@media (min-width: 640px) {
  .sm\:block {
    display: block !important;
  }
  .sm\:inline {
    display: inline !important;
  }
  .sm\:inline-block {
    display: inline-block !important;
  }
  .sm\:flex {
    display: flex !important;
  }
}

@media (max-width: 767px) {
  .hide-on-mobile {
    display: none !important;
  }
  .show-on-mobile {
    display: block !important;
  }
}

@media (min-width: 768px) and (max-width: 1024px) {
  .hide-on-tablet {
    display: none !important;
  }
  .show-on-tablet {
    display: block !important;
  }
}

@media (min-width: 1025px) {
  .hide-on-desktop {
    display: none !important;
  }
  .show-on-desktop {
    display: block !important;
  }
}

/* Overflow Containment & Fluid Media */
pre, code {
  max-width: 100%;
}

.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}