/* ==========================================================================
   KCS Consultancy — Modern B2B Stylesheet
   Palette:
     Primary (Navy): #0F2A47
     Accent (Teal):  #0B7A6B
     Surface:        #F5F7FA
     Text:           #1A2433
     Muted:          #5B6777
     White:          #FFFFFF
     Border:         #E2E8F0
   ========================================================================== */

:root {
  --color-primary: #0F2A47;
  --color-primary-dark: #091B2E;
  --color-primary-light: #183F66;
  --color-accent: #0B7A6B;
  --color-accent-hover: #085A4F;
  --color-accent-light: #E6F5F3;
  --color-surface: #F5F7FA;
  --color-surface-subtle: #EDF1F7;
  --color-text: #1A2433;
  --color-muted: #5B6777;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;
  --color-border-hover: #CBD5E1;
  --color-focus: #0B7A6B;

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(15, 42, 71, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 42, 71, 0.07), 0 2px 4px -2px rgba(15, 42, 71, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 42, 71, 0.08), 0 4px 6px -4px rgba(15, 42, 71, 0.04);

  --max-width: 1200px;
  --header-height: 76px;
  --transition: all 0.2s ease-in-out;
}

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

html {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

/* Accessibility: Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 1000;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--color-accent);
}

/* Visible Focus Outline */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

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

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

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

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

p.lead {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--color-text);
  max-width: 45rem;
}

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

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

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: var(--transition);
}

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

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

.section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.section-sm {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

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

.section-header {
  margin-bottom: 3rem;
  max-width: 48rem;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

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

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  font-size: 1.35rem;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.brand-kcs {
  font-weight: 800;
  margin-right: 0.3rem;
}

.brand-sub {
  font-weight: 400;
  color: var(--color-muted);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: var(--transition);
}

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

.nav-link[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

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

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

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

.btn-secondary:hover {
  background-color: var(--color-surface);
  border-color: var(--color-border-hover);
  color: var(--color-primary);
}

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

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

.btn-lg {
  padding: 0.95rem 1.75rem;
  font-size: 1.05rem;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  margin-bottom: 1.5rem;
}

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

.mobile-toggle svg {
  display: block;
  width: 24px;
  height: 24px;
}

/* Hero Section */
.hero {
  padding-top: 4.5rem;
  padding-bottom: 4.5rem;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-surface) 100%);
}

.hero-pill {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-top: 0.75rem;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* Cards */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.card-link {
  margin-top: auto;
  padding-top: 1.25rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Feature List */
.feature-list {
  list-style: none;
  margin-top: 1rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
  font-size: 0.95rem;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

/* Notice / Callout */
.callout {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.callout p {
  margin: 0;
  color: var(--color-text);
}

.callout-disclaimer {
  border-left-color: var(--color-muted);
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Process Timeline */
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.step-card {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.step-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  line-height: 1;
}

/* SVG Diagrams */
.diagram-box {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  margin: 2rem 0;
  text-align: center;
}

.diagram-svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.diagram-caption {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 1rem;
  font-style: italic;
}

/* Technology Pills */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.tag-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-primary);
  font-size: 0.95rem;
}

.form-required {
  color: #DC2626;
  margin-left: 0.2rem;
}

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

.form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
  outline: none;
}

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

.form-help {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 0.35rem;
}

.form-status {
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-top: 1.5rem;
  display: none;
}

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

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

/* Footer */
.site-footer {
  background-color: var(--color-primary);
  color: #E2E8F0;
  padding-top: 4.5rem;
  padding-bottom: 2.5rem;
  margin-top: auto;
  border-top: 1px solid var(--color-primary-dark);
}

.site-footer a {
  color: #CBD5E1;
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand .brand-link {
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.footer-brand .brand-sub {
  color: #94A3B8;
}

.footer-tagline {
  color: #94A3B8;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.footer-desc {
  color: #94A3B8;
  font-size: 0.9rem;
  line-height: 1.5;
  margin-top: 0.75rem;
}

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

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

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
  color: #94A3B8;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: #94A3B8;
}

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

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .step-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.65rem; }
  .section { padding-top: 3.5rem; padding-bottom: 3.5rem; }

  .mobile-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    display: none;
  }

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

  .nav-actions {
    display: none;
  }

  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Reduced Motion */
@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;
  }
}