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

html, body {
  height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  color: #111827;
  background: #fff;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #1e293b;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Hero ---- */

header {
  padding: 40px 24px 44px;
  text-align: center;
  border-bottom: 1px solid #f0eff8;
}

header .logo {
  font-size: 48px;
  display: block;
  margin-bottom: 12px;
}

header h1 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: 2px;
  color: #111827;
  margin-bottom: 10px;
}

header .tagline {
  font-size: 17px;
  color: #4b5563;
  margin-bottom: 6px;
}

header .subtitle {
  font-size: 14px;
  color: #9ca3af;
  margin-bottom: 24px;
}

header .subtitle a {
  color: #6b7280;
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-primary {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  background: #1e293b;
  color: #fff;
  transition: background 0.15s;
}

.cta-primary:hover {
  background: #3d3a6e;
  text-decoration: none;
}

.cta-secondary {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  color: #1e293b;
  border: 1px solid #d1d0e8;
  transition: background 0.15s;
}

.cta-secondary:hover {
  background: #f5f3fb;
  text-decoration: none;
}

/* ---- Features ---- */

.features {
  padding: 40px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px 40px;
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #1e293b;
}

.feature-card p {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.6;
}

/* ---- Example ---- */

.example {
  padding: 40px 0;
  background: #fafafa;
  border-top: 1px solid #f0eff8;
  border-bottom: 1px solid #f0eff8;
}

.example h2, .tutorials h2 {
  font-size: 26px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
  color: #111827;
}

.section-subtitle {
  text-align: center;
  color: #6b7280;
  font-size: 15px;
  margin-bottom: 20px;
}

.example-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 20px;
}

@media (max-width: 768px) {
  .example-layout {
    grid-template-columns: 1fr;
  }
}

.code-header {
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  padding: 8px 16px;
  background: #e5e7eb;
  border-radius: 8px 8px 0 0;
  letter-spacing: 0.5px;
}

.code-block pre {
  background: #f3f4f6;
  color: #1f2937;
  padding: 20px;
  border-radius: 0 0 8px 8px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
}

.code-block code {
  font-family: inherit;
}

.demo-block {
  display: flex;
  flex-direction: column;
}

#app-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 1px solid #e9e8f4;
  border-radius: 0 0 8px 8px;
  min-height: 120px;
}

/* ---- Counter demo styles ---- */

.counter {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 24px;
  font-weight: 700;
}

.counter button {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: 1px solid #e4e1f0;
  background: #fff;
  font-size: 20px;
  font-weight: 600;
  color: #1e293b;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.counter button:hover {
  background: #f5f3fb;
  transform: scale(1.05);
}

.counter button:active {
  transform: scale(0.95);
}

/* ---- Tutorials ---- */

.tutorials {
  padding: 40px 0;
}

.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}

@media (max-width: 768px) {
  .tutorial-grid {
    grid-template-columns: 1fr;
  }
}

.tutorial-card {
  display: block;
  border: 1px solid #e9e8f4;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.15s, box-shadow 0.15s;
  color: inherit;
}

.tutorial-card:hover {
  border-color: #a8a4d4;
  box-shadow: 0 2px 8px rgba(42, 39, 85, 0.06);
  text-decoration: none;
}

.tutorial-name {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #111827;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tutorial-desc {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.4;
}

.stars {
  font-size: 11px;
  letter-spacing: 1px;
}

.star {
  color: #d0d0d8;
}

.star.filled {
  color: #a8a4d4;
}

/* ---- Footer ---- */

footer {
  text-align: center;
  padding: 32px 24px;
  color: #9ca3af;
  font-size: 13px;
  border-top: 1px solid #f0eff8;
}

footer a {
  color: #6b7280;
}

/* SITE NAVBAR ****************************************/
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 2px;
  background: #1e293b;
  padding: 0 12px;
  height: 44px;
}

.site-nav-link {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.site-nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.site-nav-link.active {
  color: #fff;
  font-weight: 700;
}

.site-nav-github {
  margin-left: auto;
  display: flex;
  align-items: center;
  padding: 6px;
  border-radius: 6px;
  color: #cbd5e1;
  transition: color 0.15s, background 0.15s;
}

.site-nav-github:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}