:root {
  --bg-color: #0b0f19;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-solid: #111827;
  --bg-input: #0e1526;
  --border-color: rgba(255, 255, 255, 0.12);
  --border-focus: rgba(139, 92, 246, 0.6);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --primary-color: #8b5cf6;
  --primary-hover: #7c3aed;
  --primary-glow: rgba(139, 92, 246, 0.3);
  --accent-color: #10b981;
  --accent-glow: rgba(16, 185, 129, 0.25);
  --warning-color: #f59e0b;
  --radius: 16px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Light Theme Variables Overrides */
html.light-theme {
  --bg-color: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-solid: #ffffff;
  --bg-input: #f1f5f9;
  --border-color: rgba(15, 23, 42, 0.12);
  --border-focus: rgba(139, 92, 246, 0.6);
  --text-main: #0f172a;
  --text-muted: #475569;
  --primary-color: #7c3aed;
  --primary-hover: #6d28d9;
  --primary-glow: rgba(124, 58, 237, 0.2);
  --accent-color: #059669;
  --accent-glow: rgba(5, 150, 105, 0.2);
}

html.light-theme .navbar {
  background: rgba(248, 250, 252, 0.92);
}

html.light-theme .theme-toggle-btn {
  background: rgba(15, 23, 42, 0.06);
  border-color: var(--border-color);
  color: var(--text-main);
}

html.light-theme .theme-toggle-btn:hover {
  background: rgba(15, 23, 42, 0.12);
}

html.light-theme .glow-1 {
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
}

html.light-theme .glow-2 {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, transparent 70%);
}

/* Theme Toggle Button Style */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  border-radius: 99px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.theme-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-1px);
}

/* Language Switcher Button Style */
.lang-switch-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(139, 92, 246, 0.2);
  border: 1px solid var(--primary-color);
  border-radius: 99px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.lang-switch-btn:hover {
  background: var(--primary-color);
  color: #ffffff;
  transform: translateY(-1px);
}

html.light-theme .lang-switch-btn {
  background: rgba(124, 58, 237, 0.1);
  border-color: var(--primary-color);
  color: #6d28d9;
}

html.light-theme .lang-switch-btn:hover {
  background: var(--primary-color);
  color: #ffffff;
}


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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-main);
}

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

/* Background Glow Effects */
.background-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
}

.glow-1 {
  top: -150px;
  left: 30%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
}

.glow-2 {
  bottom: -150px;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  background: rgba(11, 15, 25, 0.92);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: #fff;
}

.nav-btn-hub {
  color: var(--primary-color) !important;
  font-weight: 600 !important;
}

.nav-btn-demo {
  background: rgba(139, 92, 246, 0.15);
  color: var(--primary-color) !important;
  border: 1px solid rgba(139, 92, 246, 0.4);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600 !important;
}

.nav-btn-demo:hover {
  background: var(--primary-color);
  color: #fff !important;
  border-color: var(--primary-color);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.12);
  color: var(--primary-color);
  border: 1px solid rgba(139, 92, 246, 0.3);
  padding: 6px 16px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-color);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-color);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
  100% { opacity: 1; transform: scale(1); }
}

.badge-accent {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-color);
  border-color: rgba(16, 185, 129, 0.3);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, #a78bfa 0%, #c084fc 50%, #e879f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 30px;
}

.tech-stack-pills {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.pill {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.82rem;
  color: var(--text-main);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: #fff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(139, 92, 246, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-2px);
}

/* Sections */
.section {
  padding: 60px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 4px;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* Pipeline Diagram */
.pipeline-card {
  padding: 36px;
}

.pipeline-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 24px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition);
}

.step:hover {
  background: rgba(139, 92, 246, 0.08);
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-2px);
}

.step-num {
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 12px;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.step h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: #fff;
  font-family: var(--font-heading);
}

.step p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Metrics Counter Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.metric-card {
  background: rgba(17, 24, 39, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
}

.metric-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-color);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Interactive Test Studio Terminal */
.terminal-card {
  background: #0a0f1d;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius);
  overflow: hidden;
}

.terminal-header {
  background: #111827;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.terminal-controls {
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.test-suite-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.test-suite-btn:hover, .test-suite-btn.active {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--primary-color);
  color: #fff;
}

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #d8b4fe;
  line-height: 1.6;
  min-height: 280px;
  max-height: 400px;
  overflow-y: auto;
  background: #080c17;
}

.terminal-body pre {
  white-space: pre-wrap;
  word-break: break-word;
}

.t-green { color: #34d399; }
.t-purple { color: #c084fc; }
.t-yellow { color: #fbbf24; }
.t-blue { color: #60a5fa; }
.t-muted { color: #6b7280; }

/* Interactive Explorer Tabs */
.explorer-tabs {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 12px 20px;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.tab-btn:hover, .tab-btn.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.accordion-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.accordion-header {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
}

.accordion-header:hover {
  background: rgba(139, 92, 246, 0.1);
}

.accordion-body {
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.92rem;
  border-top: 1px solid var(--border-color);
  display: none;
}

.accordion-item.open .accordion-body {
  display: block;
}

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-sub {
  font-size: 0.8rem;
  margin-top: 4px;
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .nav-links { display: none; }
  .pipeline-steps { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
}