:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #101522;
  --bg-tertiary: #171f32;
  --border-color: #232d45;
  --border-focus: #3b82f6;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --badge-bg: #1e293b;
  --badge-border: #334155;
  --badge-text: #cbd5e1;
  --btn-disabled-bg: #1e293b;
  --btn-disabled-border: #334155;
  --btn-disabled-text: #64748b;
  --card-bg: #0f1422;
  --card-border: #1e293b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --max-width: 960px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --border-focus: #2563eb;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-glow: rgba(2, 132, 199, 0.12);
    --badge-bg: #f1f5f9;
    --badge-border: #cbd5e1;
    --badge-text: #334155;
    --btn-disabled-bg: #e2e8f0;
    --btn-disabled-border: #cbd5e1;
    --btn-disabled-text: #94a3b8;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
  }
}

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

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;
}

/* Header & Nav */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: contain;
}

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

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

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

.nav-links a.active {
  color: var(--accent);
}

/* Container */
.content-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
  flex: 1;
  width: 100%;
}

/* Hero */
.hero {
  text-align: center;
  padding: 2.5rem 0 3.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  background-color: var(--badge-bg);
  border: 1px solid var(--badge-border);
  color: var(--badge-text);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 2rem;
  line-height: 1.55;
}

/* CTA buttons */
.cta-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--accent);
  color: #04101e;
  border-color: var(--accent);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #ffffff;
}

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

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  border-color: var(--text-muted);
}

.btn-disabled {
  background-color: var(--btn-disabled-bg);
  color: var(--btn-disabled-text);
  border-color: var(--btn-disabled-border);
  cursor: not-allowed;
  opacity: 0.8;
}

/* Section styling */
.section {
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.section-intro {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Grid for features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.5rem;
}

.feature-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Download Status Box */
.release-status-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2.5rem;
  text-align: center;
}

.status-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--badge-bg);
  border: 1px solid var(--badge-border);
  color: var(--accent);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.release-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.release-note {
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 1.5rem;
  font-size: 0.95rem;
}

/* Steps List */
.steps-list {
  list-style: none;
  counter-reset: step-counter;
  margin-top: 1rem;
}

.steps-list li {
  counter-increment: step-counter;
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.steps-list li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.75rem;
  height: 1.75rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.steps-list li strong {
  color: var(--text-primary);
}

/* Info Box / Specs */
.info-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  margin-top: 1rem;
}

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

.spec-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.spec-list li:last-child {
  border-bottom: none;
}

.spec-label {
  color: var(--text-muted);
  font-weight: 500;
}

.spec-value {
  color: var(--text-primary);
  font-family: var(--font-mono);
}

/* Text Callout */
.text-callout {
  background-color: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  border-radius: 0 6px 6px 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.55;
  margin-top: 0.75rem;
}

.text-callout strong {
  color: var(--text-primary);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  padding: 2rem 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-brand strong {
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

/* Focus states for accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.15rem;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .nav-container {
    padding: 0.75rem 1rem;
  }
  .content-container {
    padding: 2rem 1rem 3rem;
  }
  .footer-container {
    flex-direction: column;
    align-items: flex-start;
  }
}