/* TechCrafters Design System - Vanilla CSS */
:root {
  /* Brand Palette */
  --color-navy-dark: #070d1e;
  --color-navy-main: #0a1128;
  --color-navy-surface: #111a38;
  --color-navy-border: #1e2c56;
  
  --color-blue-primary: #2563eb;
  --color-blue-hover: #1d4ed8;
  --color-blue-light: #eff6ff;
  --color-blue-subtle: #dbeafe;

  --color-accent-orange: #ea580c;
  --color-accent-orange-hover: #c2410c;
  --color-accent-orange-subtle: #ffedd5;

  --color-surface-base: #f8fafc;
  --color-surface-card: #ffffff;
  --color-surface-alt: #f1f5f9;
  
  --color-text-primary: #0f172a;
  --color-text-secondary: #334155;
  --color-text-muted: #64748b;
  --color-text-inverse: #f8fafc;
  --color-text-inverse-muted: #94a3b8;

  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;

  /* Typography */
  --font-stack: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Spacing & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.15);

  --max-width: 1200px;
  --max-width-narrow: 800px;
  --header-height: 72px;
}

/* Reset & Global */
*, *::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-primary);
  background-color: var(--color-surface-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

/* Focus & Accessibility */
:focus-visible {
  outline: 3px solid var(--color-accent-orange);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-accent-orange);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  z-index: 9999;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

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

h1 { font-size: clamp(2.2rem, 4vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1rem;
}
p:last-child {
  margin-bottom: 0;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-padding {
  padding: clamp(3.5rem, 6vw, 6rem) 0;
}

.section-padding-sm {
  padding: 2.5rem 0;
}

/* Dark Section Backgrounds */
.bg-navy {
  background-color: var(--color-navy-main);
  color: var(--color-text-inverse);
}
.bg-navy h1, .bg-navy h2, .bg-navy h3, .bg-navy h4 {
  color: var(--color-text-inverse);
}
.bg-navy p {
  color: var(--color-text-inverse-muted);
}

.bg-navy-dark {
  background-color: var(--color-navy-dark);
  color: var(--color-text-inverse);
}

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

.bg-surface-white {
  background-color: #ffffff;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(10, 17, 40, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-navy-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

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

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.brand-logo-icon {
  width: 34px;
  height: 34px;
  color: var(--color-blue-primary);
}

.brand-tag {
  font-size: 0.75rem;
  font-weight: 600;
  background-color: var(--color-navy-border);
  color: var(--color-text-inverse-muted);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-left: 0.5rem;
  display: none;
}

@media (min-width: 768px) {
  .brand-tag { display: inline-block; }
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--color-text-inverse-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-navy-border);
  color: #ffffff;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

@media (max-width: 850px) {
  .mobile-toggle { display: block; }
  
  .nav-menu {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-navy-main);
    border-bottom: 1px solid var(--color-navy-border);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    display: none;
  }

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

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent-orange);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(234, 88, 12, 0.2);
}

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

.btn-secondary {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
}

.btn-outline-dark {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-outline-dark:hover {
  background-color: var(--color-surface-alt);
  border-color: var(--color-text-primary);
}

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

/* Eyebrow & Badges */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-blue-primary);
  margin-bottom: 0.75rem;
}

.eyebrow-dark {
  color: #60a5fa;
}

.eyebrow-orange {
  color: #fb923c;
}

/* Section Headings */
.section-header {
  margin-bottom: 3rem;
}
.section-header.text-center {
  text-align: center;
}
.section-header p {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 680px;
}
.text-center p {
  margin-left: auto;
  margin-right: auto;
}

/* Cards & Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}
@media (min-width: 640px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 640px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  background-color: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}

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

.card-navy {
  background-color: var(--color-navy-surface);
  border-color: var(--color-navy-border);
}
.card-navy:hover {
  border-color: var(--color-blue-primary);
  box-shadow: var(--shadow-glow);
}

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

.card-icon-dark {
  background-color: rgba(37, 99, 235, 0.15);
  color: #60a5fa;
}

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

.card-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  flex-grow: 1;
}

/* Assessment Callout Banner */
.assessment-banner {
  background: linear-gradient(135deg, var(--color-navy-main) 0%, #0d1a40 100%);
  border: 1px solid var(--color-navy-border);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3.5rem);
  color: #ffffff;
  box-shadow: var(--shadow-lg);
}

.assessment-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .assessment-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
}

.pill-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.pill {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #e2e8f0;

  display: flex;
  align-items: center;
  gap: 0.4rem;
}

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

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: var(--color-text-primary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  color: var(--color-text-primary);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
  border-color: var(--color-blue-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  outline: none;
}

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

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.form-checkbox input[type="checkbox"] {
  margin-top: 0.25rem;
  width: 18px;
  height: 18px;
  accent-color: var(--color-blue-primary);
}

/* Honeypot field (hidden from visually impared and sighted users) */
.honeypot-field {
  display: none !important;
  visibility: hidden !important;
  position: absolute !important;
  left: -9999px !important;
}

.validation-message {
  color: #dc2626;
  font-size: 0.85rem;
  margin-top: 0.3rem;
  display: block;
}

.alert-success {
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.alert-danger {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

/* SVG Hero Diagram Graphic */
.system-diagram-container {
  width: 100%;
  background: var(--color-navy-surface);
  border: 1px solid var(--color-navy-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
}

/* Footer */
.site-footer {
  background-color: var(--color-navy-dark);
  color: var(--color-text-inverse-muted);
  border-top: 1px solid var(--color-navy-border);
  margin-top: auto;
  padding: 4rem 0 2rem 0;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

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

.footer-brand h3 {
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 0.5rem;
}
.footer-links a {
  color: var(--color-text-inverse-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}
.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid var(--color-navy-border);
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
  }
}

/* Media Queries & Print */
@media print {
  .site-header, .site-footer, .btn { display: none !important; }
  body { background: white; color: black; }
}

@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;
  }
}