/* Schema Sandbox Landing Page Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=Fira+Code:wght@400;500&display=swap');

:root {
  --bg-color: #08090d;
  --bg-grid: rgba(99, 102, 241, 0.03);
  --card-bg: rgba(17, 19, 31, 0.65);
  --card-border: rgba(255, 255, 255, 0.06);
  --card-border-hover: rgba(99, 102, 241, 0.25);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --primary: #6366f1; /* Indigo */
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.15);
  
  --secondary: #06b6d4; /* Cyan */
  --secondary-hover: #0891b2;
  --secondary-glow: rgba(6, 182, 212, 0.15);
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius: 12px;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background Gradients & Grid */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, var(--bg-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--bg-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at top center, rgba(0,0,0,1) 30%, rgba(0,0,0,0) 80%);
  pointer-events: none;
  z-index: 0;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

.glow-1 {
  top: -10%;
  right: 15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary) 0%, rgba(0,0,0,0) 70%);
}

.glow-2 {
  top: 40%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--secondary) 0%, rgba(0,0,0,0) 70%);
}

.glow-3 {
  bottom: 10%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary) 0%, rgba(0,0,0,0) 70%);
}

/* Core Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

/* Header & Navigation */
header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(8, 9, 13, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  z-index: 100;
  transition: var(--transition);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-primary) 30%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background-color: var(--secondary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--secondary);
}

.nav-menu {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}

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

.nav-cta {
  background: linear-gradient(135deg, var(--primary) 0%, #4338ca 100%);
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  font-weight: 600;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
}

.github-icon-link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
}

.github-icon-link:hover {
  color: var(--text-primary);
  transform: scale(1.05);
}

/* Hero Section */
.hero {
  padding: 8rem 0 5rem;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.tagline {
  align-self: flex-start;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  padding: 0.35rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 40%, #c7d2fe 70%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.15rem;
  margin-bottom: 2.5rem;
  max-width: 540px;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #4338ca 100%);
  color: white;
  border: none;
  box-shadow: 0 10px 25px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  border-color: var(--card-border-hover);
  background: rgba(20, 22, 35, 0.8);
  transform: translateY(-2px);
}

.hero-image-container {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--card-border);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  background: var(--card-bg);
  padding: 0.5rem;
}

.hero-image {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}

/* Feature/Concept Blocks */
.section {
  padding: 6rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-subtitle {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.75rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 2.5rem 2rem;
  backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: var(--card-border-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(99, 102, 241, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--primary);
}

.glass-card:nth-child(even) .card-icon {
  background: rgba(6, 182, 212, 0.1);
  color: var(--secondary);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Flow Diagram section */
.flow-container {
  background: rgba(17, 19, 31, 0.4);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 3rem;
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.flow-step-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 900px;
  position: relative;
}

.flow-step {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.25rem;
  width: 190px;
  text-align: center;
  z-index: 2;
  box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.flow-step.active-gate {
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.2);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(17, 19, 31, 0.8) 100%);
}

.flow-step-title {
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.flow-step.active-gate .flow-step-title {
  color: #a5b4fc;
}

.flow-step-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.flow-arrow {
  color: var(--text-muted);
  font-size: 1.5rem;
  font-weight: bold;
}

/* Tabbed Showcase Section */
.showcase-container {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2.5rem;
  align-items: start;
}

.showcase-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.showcase-tab {
  background: rgba(17, 19, 31, 0.4);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 1.25rem 1.5rem;
  text-align: left;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
}

.showcase-tab:hover {
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
  background: rgba(17, 19, 31, 0.7);
}

.showcase-tab.active {
  background: var(--card-bg);
  border-color: var(--primary);
  color: var(--text-primary);
  box-shadow: 0 8px 20px var(--primary-glow);
}

.showcase-content {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 3rem;
  min-height: 480px;
  position: relative;
  display: none;
}

.showcase-content.active {
  display: block;
  animation: fadeIn 0.4s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.showcase-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.showcase-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.showcase-one-line {
  color: var(--secondary);
  font-weight: 600;
  font-size: 1.05rem;
}

.showcase-body {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
}

.showcase-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.showcase-meta-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.showcase-meta-content {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contract-list {
  list-style: none;
}

.contract-item {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contract-item::before {
  content: "✦";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

.showcase-code-wrapper {
  display: flex;
  flex-direction: column;
}

.code-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}

pre {
  background: #040508;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 1.25rem;
  overflow-x: auto;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #e2e8f0;
}

/* Specifications Grid */
.specs-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: center;
}

.specs-features {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.spec-feature {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.spec-feature-icon {
  color: var(--secondary);
  font-weight: bold;
  font-size: 1.2rem;
  line-height: 1.2;
}

.spec-feature-title {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.spec-feature-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.spec-preview-card {
  background: rgba(17, 19, 31, 0.4);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  backdrop-filter: blur(12px);
}

.spec-preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.spec-preview-badge {
  background: rgba(6, 182, 212, 0.1);
  color: var(--secondary);
  border: 1px solid rgba(6, 182, 212, 0.2);
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-weight: 600;
}

/* Licensing & Attribution */
.license-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: stretch;
}

.attribution-card {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(17, 19, 31, 0.8) 100%);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.attribution-box {
  background: rgba(4, 5, 8, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.attribution-text {
  font-style: italic;
  color: #cbd5e1;
}

.copy-btn {
  background: var(--primary);
  border: none;
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.copy-btn:hover {
  background: var(--primary-hover);
  transform: scale(1.05);
}

.copy-btn:active {
  transform: scale(0.95);
}

.copied-toast {
  position: absolute;
  top: -35px;
  right: 10px;
  background: var(--success);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

.copied-toast.show {
  opacity: 1;
  transform: translateY(3px);
}

/* Substack Section */
.subscribe-card {
  background: linear-gradient(135deg, rgba(20, 22, 35, 0.8) 0%, rgba(6, 182, 212, 0.05) 100%);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 4rem 3rem;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.subscribe-card::before {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  background: var(--secondary);
  border-radius: 50%;
  filter: blur(80px);
  top: -50px;
  left: -50px;
  opacity: 0.15;
}

.subscribe-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.subscribe-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.subscribe-form {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: 0.75rem;
}

.subscribe-input {
  flex: 1;
  background: rgba(4, 5, 8, 0.7);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 0.85rem 1.25rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: var(--transition);
}

.subscribe-input:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.15);
}

.btn-substack {
  background: #ff5c35; /* Substack Orange */
  color: white;
  border: none;
}

.btn-substack:hover {
  background: #e04a25;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 92, 53, 0.25);
}

.subscribe-tip {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.subscribe-tip a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  font-weight: 500;
}

.subscribe-tip a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

/* Footer */
footer {
  border-top: 1px solid var(--card-border);
  padding: 4rem 0 2rem;
  background: #050608;
  color: var(--text-muted);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.footer-logo-dot {
  width: 6px;
  height: 6px;
  background-color: var(--secondary);
  border-radius: 50%;
}

.footer-desc {
  font-size: 0.85rem;
  line-height: 1.6;
}

.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link-title {
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.03);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Status Disclaimer */
.status-disclaimer {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(245, 158, 11, 0.05);
  border: 1px solid rgba(245, 158, 11, 0.15);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  align-self: flex-start;
}

.status-disclaimer-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--warning);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--warning);
  flex-shrink: 0;
  animation: pulse-warn 2s infinite;
}

@keyframes pulse-warn {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.5); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(245, 158, 11, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(245, 158, 11, 0); }
}

/* Language Switcher */
html[lang="en"] .lang-cn {
  display: none !important;
}
html[lang="cn"] .lang-en {
  display: none !important;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-right: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  flex-shrink: 0;
  white-space: nowrap;
}
.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.8rem;
  transition: var(--transition);
  padding: 0.15rem 0.4rem;
  border-radius: 9999px;
  font-family: var(--font-heading);
}
.lang-btn:hover {
  color: var(--text-primary);
}
.lang-btn.active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid rgba(99, 102, 241, 0.3);
}
.lang-divider {
  color: var(--card-border);
  font-size: 0.8rem;
}

/* Responsiveness */
@media (max-width: 992px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
    padding: 6rem 0 3rem;
  }
  
  .tagline {
    align-self: center;
  }
  
  .hero-desc {
    margin: 0 auto 2.5rem;
  }
  
  .status-disclaimer {
    align-self: center;
    margin: 0 auto 2rem;
  }
  
  .hero-ctas {
    justify-content: center;
  }
  
  .showcase-container {
    grid-template-columns: 1fr;
  }
  
  .showcase-tabs {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
  
  .showcase-tab {
    white-space: nowrap;
  }
  
  .showcase-body {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .specs-grid, .license-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .flow-step {
    width: 150px;
    padding: 0.85rem;
  }
  .flow-step-title {
    font-size: 0.8rem;
  }
  .flow-step-desc {
    font-size: 0.7rem;
  }
}

@media (max-width: 600px) {
  .nav-menu {
    display: none; /* simple burger menu can be added, but keeping it minimal */
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .showcase-content {
    padding: 1.5rem;
  }
  
  .subscribe-form {
    flex-direction: column;
  }
  
  .flow-step-wrapper {
    flex-direction: column;
    gap: 1rem;
  }
  
  .flow-arrow {
    transform: rotate(90deg);
  }
}