* { margin: 0; padding: 0; box-sizing: border-box; }
html { overflow-x: hidden; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: #09090b; color: #e0e0e0; min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2rem 1.2rem; overflow-x: hidden; }
a { color: #60a5fa; text-decoration: none; }
a:hover { text-decoration: underline; }
pre { background: #0f0f1a; border: 1px solid #1a1a2e; border-radius: 8px; padding: 0.8rem 1rem; overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0.5rem 0; line-height: 1.4; max-width: 100%; }
pre code { background: #1a1a2e; color: #a5b4fc; padding: 0.6rem 0.8rem; border-radius: 6px; font-size: 0.8rem; display: block; line-height: 1.4; white-space: pre; }
.container { max-width: 600px; text-align: center; }
h1 { font-size: 3.5rem; color: #fff; margin-bottom: 0.5rem; letter-spacing: -0.03em; font-weight: 700; }
h1 span { color: #60a5fa; }
.subtitle { font-size: 1.2rem; color: #666; margin-bottom: 2.5rem; }
.instruction { background: #0f0f1a; border: 1px solid #1a1a2e; border-radius: 12px; padding: 1.5rem; margin-bottom: 2rem; }
.instruction p { font-size: 1rem; color: #a0a0a0; line-height: 1.7; }
.instruction strong { color: #fff; }
.instruction code { background: #1a1a2e; color: #60a5fa; padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.95rem; }
.protocols { display: flex; justify-content: center; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.proto { background: #1a1a2e; border: 1px solid #2a2a4e; color: #a5b4fc; padding: 0.3rem 0.8rem; border-radius: 20px; font-size: 0.78rem; }
.use-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
.use-card { background: #0f0f1a; border: 1px solid #1a1a2e; border-radius: 10px; padding: 1rem; text-align: left; }
.use-icon { font-size: 1.3rem; margin-bottom: 0.4rem; }
.use-title { color: #fff; font-size: 0.9rem; font-weight: 600; margin-bottom: 0.3rem; }
.use-desc { color: #888; font-size: 0.8rem; line-height: 1.5; }
.section { width: 100%; text-align: left; margin-top: 3.5rem; }
.section-title { color: #fff; font-size: 1.2rem; font-weight: 600; margin-bottom: 1rem; text-align: center; }
.conn-label { color: #a0a0a0; font-size: 0.95rem; font-weight: 400; margin: 1rem 0 0.4rem; }
.conn-note { color: #666; font-size: 0.85rem; margin: 0.5rem 0; }
.star-wrap { margin-top: 2rem; }
.links { margin-top: 1.5rem; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 0; }
.links a { color: #60a5fa; text-decoration: none; font-size: 0.85rem; margin: 0 0.6rem; }
.links a:hover { text-decoration: underline; }
footer { margin-top: 3rem; color: #555; font-size: 0.75rem; }
@media (max-width: 480px) {
  body { padding: 1.5rem 1rem; }
  h1 { font-size: 2.6rem; }
  .subtitle { font-size: 1rem; margin-bottom: 1.8rem; }
  .use-grid { grid-template-columns: 1fr; }
  .section { margin-top: 2.5rem; }
  pre code { font-size: 0.72rem; white-space: pre-wrap; overflow-wrap: break-word; }
  .instruction { padding: 1rem; }
}