:root {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-card: #131d31;
  --bg-card-hover: #1a2742;
  --bg-input: #0a1120;
  --border-color: #1e293b;
  --border-hover: #334155;
  --border-accent: #38bdf8;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #38bdf8;
  --text-highlight: #a855f7;
  --text-success: #34d399;
  
  --brand-cyan: #06b6d4;
  --brand-blue: #3b82f6;
  --brand-purple: #8b5cf6;
  --brand-emerald: #10b981;
  --brand-amber: #f59e0b;
  --brand-rose: #f43f5e;

  --gradient-brand: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-card: linear-gradient(180deg, rgba(30, 41, 59, 0.4) 0%, rgba(15, 23, 42, 0.8) 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.15) 0%, transparent 70%);

  --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, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px -5px rgba(56, 189, 248, 0.25);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --max-width: 1280px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.1), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.05), transparent);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.2s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #fff;
}

.brand-icon-wrapper {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--gradient-brand);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

.brand-logo span.accent {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.nav-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
}

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

/* Hero Section */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.875rem;
  border-radius: var(--radius-full);
  background-color: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--text-accent);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--brand-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--brand-emerald);
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-title .gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 44rem;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

/* Search & Filter Bar */
.search-filter-wrapper {
  max-width: 52rem;
  margin: 0 auto 3rem;
}

.search-input-box {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.5rem 0.75rem 0.5rem 1.25rem;
  box-shadow: var(--shadow-lg), 0 0 30px rgba(6, 182, 212, 0.1);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input-box:focus-within {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.search-icon {
  color: var(--text-muted);
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 1.0625rem;
  padding: 0.5rem 0;
}

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

.search-stats-badge {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  white-space: nowrap;
}

/* Category Filter Tags */
.filter-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.pill-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.pill-btn:hover {
  border-color: var(--border-hover);
  color: #fff;
  background-color: var(--bg-card-hover);
}

.pill-btn.active {
  background: var(--gradient-brand);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
}

/* Blueprint Grid */
.blueprints-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.blueprint-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.blueprint-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.blueprint-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(56, 189, 248, 0.12);
}

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

.card-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.875rem;
}

.card-category-badge {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: rgba(56, 189, 248, 0.1);
  color: var(--text-accent);
}

.card-version-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-title {
  font-size: 1.1875rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.625rem;
}

.card-title a {
  color: #fff;
}

.card-title a:hover {
  color: var(--text-accent);
}

.card-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.card-meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.card-meta-item {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.card-meta-item span.val {
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 500;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.875rem;
  border-top: 1px solid var(--border-color);
}

.models-support {
  display: flex;
  gap: 0.35rem;
}

.model-tag {
  font-size: 0.6875rem;
  font-family: var(--font-mono);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-open-blueprint {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-accent);
  transition: gap 0.15s ease, color 0.15s ease;
}

.btn-open-blueprint:hover {
  color: #fff;
  gap: 0.5rem;
}

/* Ad Placement Zones (AdSense Compliant) */
.ad-zone-container {
  margin: 2.5rem auto;
  text-align: center;
  max-width: 970px;
  overflow: hidden;
}

.ad-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.ad-slot-box {
  background: rgba(19, 29, 49, 0.6);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
}

/* Features / Silo Overview Section */
.section-heading-wrapper {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto 3rem;
}

.section-tag {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand-cyan);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
}

.hubs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.hub-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}

.hub-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  background-color: var(--bg-card-hover);
}

.hub-icon-box {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background-color: rgba(56, 189, 248, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-accent);
  margin-bottom: 1.25rem;
}

.hub-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hub-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.hub-card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Site Footer */
.site-footer {
  margin-top: auto;
  background-color: #060910;
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

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

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  line-height: 1.6;
  max-width: 24rem;
}

.footer-col-title {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
  margin-bottom: 1.25rem;
}

.footer-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link-list a {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-link-list a:hover {
  color: var(--text-accent);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.legal-inline-links {
  display: flex;
  gap: 1.25rem;
}

.legal-inline-links a:hover {
  color: var(--text-secondary);
}

/* Cookie Consent Banner (GDPR & AdSense Compliant) */
.cookie-banner {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  max-width: 26rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-lg), 0 0 25px rgba(0, 0, 0, 0.5);
  z-index: 100;
  transform: translateY(150%);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

.cookie-banner.show {
  transform: translateY(0);
  opacity: 1;
}

.cookie-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cookie-text {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.cookie-text a {
  color: var(--text-accent);
  text-decoration: underline;
}

.cookie-actions {
  display: flex;
  gap: 0.75rem;
}

.btn-cookie-accept {
  flex: 1;
  background: var(--gradient-brand);
  border: none;
  color: #fff;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.btn-cookie-accept:hover {
  opacity: 0.9;
}

.btn-cookie-decline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.btn-cookie-decline:hover {
  border-color: var(--border-hover);
  color: #fff;
}

/* Legal & Static Content Pages (About, Privacy, Terms, Contact) */
.page-article {
  max-width: 52rem;
  margin: 3rem auto 5rem;
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.page-article h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.page-article .page-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-body h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 2rem 0 0.875rem;
  color: #fff;
}

.article-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
  color: var(--text-accent);
}

.article-body p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.article-body ul, .article-body ol {
  color: var(--text-secondary);
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.article-body li {
  margin-bottom: 0.35rem;
}

/* Contact Form */
.contact-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-textarea, .form-select {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: #fff;
  font-size: 0.9375rem;
  transition: border-color 0.15s ease;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--border-accent);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.btn-submit-form {
  background: var(--gradient-brand);
  border: none;
  color: #fff;
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
  transition: all 0.15s ease;
}

.btn-submit-form:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.5);
}

.form-status-msg {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  display: none;
}

.form-status-msg.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--brand-emerald);
  color: var(--text-success);
}

/* Breadcrumbs */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
}

.breadcrumb-nav a:hover {
  color: var(--text-accent);
}

.breadcrumb-separator {
  color: var(--border-hover);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .header-inner {
    height: 3.75rem;
  }
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .blueprints-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .contact-form-grid {
    grid-template-columns: 1fr;
  }
  .form-group.full-width {
    grid-column: span 1;
  }
  .page-article {
    padding: 1.5rem;
  }
  .cookie-banner {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
  }
}