/* ==========================================================================
   Tech'nSyntax — Main Stylesheet
   Design System, Mobile-First Base (320px+), Components & .ai-chat Block
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens (:root)
   -------------------------------------------------------------------------- */
:root {
  /* Brand Palette */
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-secondary: #06B6D4;
  --color-dark: #0F172A;
  --color-dark-surface: #1E293B;
  --color-bg: #F8FAFC;
  --color-text: #1E293B;
  --color-muted: #64748B;
  --color-border: #E2E8F0;
  --color-border-dark: #334155;
  --color-white: #FFFFFF;

  /* Spacing Scale */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 32px -6px rgba(15, 23, 42, 0.12), 0 6px 12px -4px rgba(15, 23, 42, 0.06);

  /* Transitions & Layout */
  --transition: 200ms ease;
  --container-max: 1200px;
  --container-pad: clamp(1rem, 4vw, 1.25rem);

  /* Typography */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Syntax Highlighting */
  --syn-kw: #38BDF8;
  --syn-str: #34D399;
  --syn-fn: #FBBF24;
  --syn-cmt: #64748B;
  --syn-prop: #E2E8F0;
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles (Mobile-first, 320px base)
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

input, button, textarea, select {
  font: inherit;
}

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

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

/* Accessibility: Focus visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-5);
  background: var(--color-dark);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition);
}

.skip-link:focus-visible {
  top: var(--space-4);
}

/* Visually Hidden */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-dark);
  line-height: 1.25;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-4);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

p {
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

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

/* Eyebrows */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: lowercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

/* Mono utility */
.font-mono {
  font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   4. Layout & Grid
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

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

.section--dark h2,
.section--dark h3 {
  color: var(--color-white);
}

.section--dark p {
  color: #94A3B8;
}

.section-head {
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.section-head.text-center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

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

.grid {
  display: grid;
  gap: var(--space-6);
}

/* --------------------------------------------------------------------------
   5. Buttons & Controls
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  text-align: center;
  line-height: 1.2;
}

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

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn--secondary {
  background-color: var(--color-secondary);
  color: var(--color-dark);
}

.btn--secondary:hover {
  background-color: #0891B2;
  color: var(--color-white);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-dark);
  border-color: var(--color-border);
}

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

.btn--light {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.btn--light:hover {
  background-color: #F1F5F9;
  color: var(--color-primary-dark);
}

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

.btn--ghost-light:hover {
  border-color: var(--color-white);
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.btn--full {
  width: 100%;
}

.btn--sm {
  min-height: 38px;
  padding: 0.375rem 1rem;
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   6. Global Header & Navigation
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-dark);
  letter-spacing: -0.01em;
  text-decoration: none;
}

.logo-mark {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.logo-dot {
  color: var(--color-primary);
}

/* Hamburger button */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger:focus-visible {
  border-color: var(--color-primary);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Nav links mobile panel */
.nav-links {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6) var(--container-pad) calc(var(--space-8) + env(safe-area-inset-bottom, 0px));
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--shadow-lg);
  transform: translateY(-120%);
  opacity: 0;
  visibility: hidden;
  transition: transform 250ms cubic-bezier(0.16, 1, 0.3, 1), opacity 200ms ease, visibility 200ms ease;
  max-height: calc(100vh - 72px);
  max-height: calc(100dvh - 72px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  touch-action: pan-y;
  z-index: 1002; /* Critical: must be higher than .nav-overlay (999) */
}

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

.nav-links a {
  display: block;
  padding: var(--space-2) 0;
  color: var(--color-dark);
  font-weight: 500;
  font-size: 1.05rem;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-cta {
  display: none;
}

.nav-cta-mobile {
  margin-top: var(--space-2);
}

.nav-whatsapp-mobile {
  margin-top: 0;
}

/* WhatsApp CTA Button Styles */
.btn--whatsapp {
  background-color: #25D366;
  color: #FFFFFF !important;
  border-color: #25D366;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-decoration: none !important;
  border-bottom: none !important;
}

.btn--whatsapp:hover {
  background-color: #1EBE5D;
  color: #FFFFFF !important;
  border-color: #1EBE5D;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}

.btn--whatsapp i {
  font-size: 1.25rem;
}

.btn--whatsapp-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  min-height: 38px;
  padding: 0;
  border-radius: var(--radius-sm);
  background-color: rgba(37, 211, 102, 0.12);
  color: #1EBE5D !important;
  border: 1px solid rgba(37, 211, 102, 0.3);
  font-size: 1.2rem;
  transition: all var(--transition);
  text-decoration: none !important;
}

.btn--whatsapp-icon:hover {
  background-color: #25D366;
  color: #FFFFFF !important;
  border-color: #25D366;
  transform: translateY(-1px);
  box-shadow: 0 2px 10px rgba(37, 211, 102, 0.3);
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 72px 0 0 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 999;
}

.nav-overlay.is-open {
  display: block;
}

/* Breadcrumb */
.breadcrumb-wrap {
  padding-top: var(--space-4);
  padding-bottom: var(--space-2);
}

.breadcrumb {
  font-size: 0.875rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
}

.breadcrumb a {
  color: var(--color-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

/* Page Header */
.page-header {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.page-header .eyebrow {
  margin-top: var(--space-2);
}

/* --------------------------------------------------------------------------
   7. Card Components
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #CBD5E1;
}

/* Numbered Card Index */
.card-index {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  display: inline-block;
}

.card-title {
  margin-bottom: var(--space-2);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-top: var(--space-4);
}

.card-link:hover {
  gap: var(--space-2);
}

/* Value Cards */
.value-card {
  display: flex;
  flex-direction: column;
}

/* Tech Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.625rem;
  background-color: #EFF6FF;
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: 500;
  border: 1px solid #DBEAFE;
}

/* Level Pills */
.pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  background-color: #EFF6FF;
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

/* --------------------------------------------------------------------------
   8. Code Editor Signature Block
   -------------------------------------------------------------------------- */
.code-editor {
  background-color: var(--color-dark);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-dark);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}

.code-editor__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background-color: #0B1120;
  border-bottom: 1px solid var(--color-border-dark);
}

.code-editor__dots {
  display: flex;
  gap: 6px;
}

.code-editor__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-editor__dot--red { background-color: #EF4444; }
.code-editor__dot--yellow { background-color: #F59E0B; }
.code-editor__dot--green { background-color: #10B981; }

.code-editor__tab {
  font-size: 0.75rem;
  color: #94A3B8;
  font-weight: 500;
}

.code-editor__body {
  padding: var(--space-4);
  overflow-x: auto;
  color: #F8FAFC;
}

.code-editor__table {
  border-collapse: collapse;
  width: 100%;
}

.code-editor__line-no {
  user-select: none;
  text-align: right;
  padding-right: var(--space-4);
  color: #475569;
  width: 24px;
}

.code-editor__code {
  white-space: pre;
}

/* Syntax Highlighting */
.syn-kw { color: var(--syn-kw); font-weight: 600; }
.syn-str { color: var(--syn-str); }
.syn-fn { color: var(--syn-fn); }
.syn-cmt { color: var(--syn-cmt); font-style: italic; }
.syn-prop { color: var(--syn-prop); }

/* Typing cursor */
.code-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background-color: var(--color-secondary);
  vertical-align: middle;
  animation: cursorBlink 1s infinite;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* --------------------------------------------------------------------------
   9. Service Detail Rows (services.html)
   -------------------------------------------------------------------------- */
.service-row {
  display: grid;
  gap: var(--space-8);
  align-items: center;
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: 90px;
}

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

.service-content {
  display: flex;
  flex-direction: column;
}

.checklist {
  margin: var(--space-4) 0 var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: 0.9375rem;
}

.checklist-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   10. Image Placeholder Handler Box
   -------------------------------------------------------------------------- */
.img-wrap {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #F1F5F9;
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 10;
}

.img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* CSS fallback box shown on error or zero-byte file */
.img-wrap.img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #F8FAFC, #E2E8F0);
  border: 1px dashed #CBD5E1;
  color: var(--color-muted);
  text-align: center;
  padding: var(--space-4);
}

.img-wrap.img-placeholder::before {
  content: "";
  display: block;
  width: 36px;
  height: 36px;
  margin-bottom: var(--space-2);
  background-color: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='3' y='3' width='18' height='18' rx='2' ry='2'%3E%3C/rect%3E%3Ccircle cx='8.5' cy='8.5' r='1.5'%3E%3C/circle%3E%3Cpolyline points='21 15 16 10 5 21'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center / contain;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='3' y='3' width='18' height='18' rx='2' ry='2'%3E%3C/rect%3E%3Ccircle cx='8.5' cy='8.5' r='1.5'%3E%3C/circle%3E%3Cpolyline points='21 15 16 10 5 21'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center / contain;
  opacity: 0.6;
}

.img-wrap.img-placeholder::after {
  content: attr(data-img-label);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  max-width: 90%;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   11. Pure-CSS Certificate Mockup (academy.html)
   -------------------------------------------------------------------------- */
.certificate-mock {
  background: var(--color-white);
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: var(--space-8);
  position: relative;
  text-align: center;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.certificate-mock::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-sm);
  pointer-events: none;
}

.certificate-glyph {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.certificate-title {
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-dark);
  margin-bottom: var(--space-2);
}

.certificate-badge {
  display: inline-block;
  margin-top: var(--space-4);
  padding: 0.25rem 0.75rem;
  background-color: #F8FAFC;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-primary);
}

/* Monogram badges (About page M & V) */
.monogram-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------------
   12. Hero Stats Row (index.html)
   -------------------------------------------------------------------------- */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-number {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 0.8125rem;
  color: var(--color-muted);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   13. CTA Band
   -------------------------------------------------------------------------- */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-6);
  text-align: center;
  margin-top: var(--space-12);
  margin-bottom: var(--space-12);
}

.cta-band h2 {
  color: var(--color-white);
}

.cta-band p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-6);
}

.cta-band-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

/* --------------------------------------------------------------------------
   14. Blog Filter & Cards (blog.html)
   -------------------------------------------------------------------------- */
.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.filter-btn {
  min-height: 40px;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-btn[aria-pressed="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.blog-card {
  display: flex;
  flex-direction: column;
  transition: opacity 250ms ease, transform 250ms ease;
}

.blog-card.is-hidden {
  display: none;
}

.blog-meta {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-top: auto;
  padding-top: var(--space-4);
}

/* --------------------------------------------------------------------------
   15. Contact Information Card (contact.html)
   -------------------------------------------------------------------------- */
.contact-info-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.contact-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

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

.contact-icon {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.contact-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--color-muted);
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.contact-val {
  font-weight: 600;
  color: var(--color-dark);
}

.contact-val a {
  color: var(--color-dark);
}

.contact-val a:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   16. AI Chatbot UI (.ai-chat block)
   -------------------------------------------------------------------------- */
.ai-chat {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Chat Header */
.ai-chat__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.ai-chat__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.ai-chat__header-info {
  display: flex;
  flex-direction: column;
}

.ai-chat__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.2;
}

.ai-chat__status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--color-muted);
  font-weight: 500;
}

.ai-chat__status-dot {
  width: 8px;
  height: 8px;
  background-color: #10B981;
  border-radius: 50%;
  position: relative;
}

.ai-chat__status-dot::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  background-color: rgba(16, 185, 129, 0.4);
  animation: pulseDot 2s infinite ease-out;
}

@keyframes pulseDot {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.2); opacity: 0; }
}

/* Chat Log */
.ai-chat__log {
  height: min(480px, 60vh);
  overflow-y: auto;
  padding: var(--space-5);
  background-color: #F8FAFC;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  scroll-behavior: smooth;
}

/* Slim scrollbar */
.ai-chat__log::-webkit-scrollbar {
  width: 5px;
}
.ai-chat__log::-webkit-scrollbar-track {
  background: transparent;
}
.ai-chat__log::-webkit-scrollbar-thumb {
  background-color: #CBD5E1;
  border-radius: 10px;
}

/* Message Bubbles */
.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  animation: fadeIn 200ms ease;
}

.chat-msg--bot {
  align-self: flex-start;
}

.chat-msg--user {
  align-self: flex-end;
}

.chat-msg__bubble {
  padding: var(--space-3) var(--space-4);
  font-size: 0.9375rem;
  line-height: 1.5;
  word-break: break-word;
}

.chat-msg--bot .chat-msg__bubble {
  background-color: var(--color-white);
  color: var(--color-dark);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  border-bottom-left-radius: 2px;
  box-shadow: var(--shadow-sm);
}

.chat-msg--user .chat-msg__bubble {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 12px;
  border-bottom-right-radius: 2px;
}

.chat-msg--user .chat-msg__bubble a {
  color: var(--color-white);
  text-decoration: underline;
}

.chat-msg--bot .chat-msg__bubble a {
  color: var(--color-primary);
  text-decoration: underline;
}

.chat-msg--bot .chat-msg__bubble code {
  background-color: #F1F5F9;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.chat-msg--user .chat-msg__bubble code {
  background-color: rgba(255, 255, 255, 0.2);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.chat-msg__time {
  font-size: 0.6875rem;
  color: var(--color-muted);
  margin-top: 4px;
}

.chat-msg--user .chat-msg__time {
  text-align: right;
}

/* Suggested chips */
.ai-chat__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
  animation: fadeIn 200ms ease;
}

.chat-chip {
  padding: 0.375rem 0.875rem;
  background-color: var(--color-white);
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-full);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}

.chat-chip:hover {
  background-color: #EFF6FF;
  border-color: var(--color-primary);
}

/* Typing indicator */
.typing-indicator {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  border-bottom-left-radius: 2px;
  width: fit-content;
}

.typing-dot {
  width: 6px;
  height: 6px;
  background-color: #94A3B8;
  border-radius: 50%;
  animation: bounceDot 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounceDot {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* Retry Button */
.chat-retry-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  color: #DC2626;
  background: transparent;
  border: 1px solid #FCA5A5;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.chat-retry-btn:hover {
  background-color: #FEF2F2;
}

/* Composer */
.ai-chat__composer {
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.ai-chat__input-row {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
}

.ai-chat__textarea {
  flex: 1;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  resize: none;
  min-height: 42px;
  max-height: 120px;
  outline: none;
  transition: border-color var(--transition);
}

.ai-chat__textarea:focus {
  border-color: var(--color-primary);
}

.ai-chat__textarea:disabled {
  background-color: #F8FAFC;
  cursor: not-allowed;
}

.ai-chat__send-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background-color var(--transition), transform var(--transition);
}

.ai-chat__send-btn:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  transform: scale(1.04);
}

.ai-chat__send-btn:disabled {
  background-color: #CBD5E1;
  cursor: not-allowed;
}

.ai-chat__send-icon {
  width: 18px;
  height: 18px;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Send Spinner */
.ai-chat__spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--color-white);
  animation: spin 0.8s infinite linear;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Composer Meta (Char counter & footer) */
.ai-chat__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.6875rem;
  color: var(--color-muted);
}

.char-counter.is-warning {
  color: #D97706;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   17. Global Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-dark);
  color: #94A3B8;
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
  border-top: 1px solid var(--color-border-dark);
}

.footer-grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.footer-tagline {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--space-6);
  color: #94A3B8;
}

/* Social icons */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.social-link {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.05);
  color: #94A3B8;
  transition: all var(--transition);
}

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

.social-link i {
  font-size: 1.125rem;
  line-height: 1;
}

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

.footer-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-dark);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: #64748B;
}

/* --------------------------------------------------------------------------
   18. Scroll-to-top Button
   -------------------------------------------------------------------------- */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--color-dark);
  color: var(--color-white);
  border: 1px solid var(--color-border-dark);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  z-index: 900;
}

.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
}

.scroll-top i {
  font-size: 1.125rem;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-1);
}

.footer-legal-links a {
  color: #94A3B8;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

.footer-legal-links a:hover {
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   19. Blog Article Specific Styles
   -------------------------------------------------------------------------- */
.article-layout {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.article-header {
  margin-bottom: var(--space-6);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-top: var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.article-featured-img {
  margin-bottom: var(--space-8);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.article-featured-img img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-body {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
}

.article-body h2 {
  font-size: 1.6rem;
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  padding-top: var(--space-4);
}

.article-body h3 {
  font-size: 1.25rem;
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.article-body p {
  margin-bottom: var(--space-5);
}

.article-body ul, .article-body ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.article-body ul li {
  list-style-type: disc;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.article-body ol li {
  list-style-type: decimal;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.article-callout {
  background-color: #EFF6FF;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
}

.article-callout p {
  color: #1E3A8A;
  margin-bottom: 0;
  font-size: 0.95rem;
}

.article-author-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: var(--space-10);
}

.article-author-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.article-author-info h4 {
  font-size: 1rem;
  color: var(--color-dark);
  margin-bottom: 2px;
}

.article-author-info p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

.article-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .article-nav {
    grid-template-columns: 1fr 1fr;
  }
}

/* --------------------------------------------------------------------------
   20. Dedicated Service Pages & Legal Document Styles
   -------------------------------------------------------------------------- */
.service-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 960px) {
  .service-hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-12);
  }
}

.service-stat-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

@media (min-width: 768px) {
  .service-stat-bar {
    grid-template-columns: repeat(4, 1fr);
  }
}

.service-stat-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  text-align: center;
}

.service-stat-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
  font-family: var(--font-mono);
  line-height: 1.2;
}

.service-stat-lbl {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-top: var(--space-1);
}

.process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .process-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.process-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.process-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.process-step-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: rgba(37, 99, 235, 0.08);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.process-card h3 {
  font-size: 1.15rem;
  margin-bottom: var(--space-2);
  color: var(--color-dark);
}

.process-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

.capability-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
}

.capability-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.capability-card h3 i {
  color: var(--color-primary);
  font-size: 1.1rem;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .faq-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

.faq-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.faq-card h3 {
  font-size: 1.05rem;
  color: var(--color-dark);
  margin-bottom: var(--space-2);
}

.faq-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Legal Document Styles */
.legal-layout {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

.legal-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.legal-body {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
}

.legal-body h2 {
  font-size: 1.4rem;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  color: var(--color-dark);
}

.legal-body h3 {
  font-size: 1.15rem;
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--color-dark);
}

.legal-body p,
.legal-body ul,
.legal-body ol {
  margin-bottom: var(--space-4);
}

.legal-body ul,
.legal-body ol {
  padding-left: var(--space-6);
}

.legal-body li {
  margin-bottom: var(--space-2);
}

/* Mobile pre code block horizontal scrolling fix */
.code-editor__body pre,
pre.font-mono {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
}