/**
 * AITestHub LLP - Global Styles & Reset
 * Technical Enterprise Quality Engineering Look & Feel
 */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(rgba(0, 210, 255, 0.08) 1px, transparent 1px),
    radial-gradient(circle at 50% 0%, rgba(0, 102, 255, 0.12) 0%, transparent 60%);
  background-size: 32px 32px, 100% 800px;
  background-position: 0 0, center 0;
  background-repeat: repeat, no-repeat;
  overflow-x: hidden;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--accent-cyan);
  color: var(--bg-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 700;
  z-index: 1000;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 3px solid #ffffff;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 4.5vw, var(--text-6xl)); }
h2 { font-size: clamp(1.8rem, 3.2vw, var(--text-4xl)); }
h3 { font-size: clamp(1.35rem, 2.2vw, var(--text-2xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
}

p.lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: #cbd5e1;
}

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

a:hover {
  color: #38bdf8;
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Containers */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-wide { max-width: var(--container-2xl); }

/* Section Standard */
.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
  position: relative;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: var(--space-12);
  text-align: center;
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
}

.section-header.text-left {
  text-align: left;
  margin-left: 0;
}

.section-subtitle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
  background: rgba(0, 210, 255, 0.08);
  border: 1px solid rgba(0, 210, 255, 0.25);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

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

.btn-primary {
  background: var(--gradient-accent);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.35);
}

.btn-primary:hover {
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(0, 210, 255, 0.45);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-accent);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border-color: var(--border-accent);
}

.btn-outline:hover {
  background: rgba(0, 210, 255, 0.08);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

.btn-sm {
  font-size: var(--text-xs);
  padding: 0.55rem 1rem;
}

.btn-lg {
  font-size: var(--text-base);
  padding: 1.05rem 2rem;
  border-radius: var(--radius-lg);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

/* Card System */
.card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 210, 255, 0.08);
  transform: translateY(-2px);
}

.card:hover::before {
  opacity: 1;
}

/* Engineering Status Indicators */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge-pass {
  background: var(--status-pass-bg);
  color: var(--status-pass);
  border: 1px solid var(--status-pass-border);
}

.badge-info {
  background: var(--status-info-bg);
  color: var(--status-info);
  border: 1px solid var(--status-info-border);
}

.badge-warning {
  background: var(--status-warning-bg);
  color: var(--status-warning);
  border: 1px solid var(--status-warning-border);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
  display: inline-block;
  animation: pulse-ring 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse-ring {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Grid Layout Utilities */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

@media (max-width: 1024px) {
  .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
  .section { padding-top: var(--space-12); padding-bottom: var(--space-12); }
  .btn-group { flex-direction: column; width: 100%; }
  .btn-group .btn { width: 100%; }
}