:root{--bg-color: #0d1117;--bg-card: #161b22;--text-primary: #f0f6fc;--text-secondary: #8b949e;--accent-color: #58a6ff;--accent-hover: #1f6feb;--border-color: #30363d;--success-color: #238636;--danger-color: #da3633;--warning-color: #d29922;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}body{margin:0;font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased}.app-container{min-height:100vh;display:flex;flex-direction:column}.btn{padding:.5rem 1rem;border-radius:6px;border:1px solid rgba(240,246,252,.1);background-color:#21262d;color:var(--text-primary);font-weight:500;cursor:pointer;transition:.2s cubic-bezier(.3,0,.5,1);font-size:14px}.btn:hover{background-color:#30363d;border-color:#8b949e}.btn-primary{background-color:#1f6feb;border-color:#f0f6fc1a;color:#fff}.btn-primary:hover{background-color:#388bfd}input,textarea,select{background-color:var(--bg-color);border:1px solid var(--border-color);color:var(--text-primary);padding:8px 12px;border-radius:6px;outline:none;font-size:14px}input:focus,textarea:focus,select:focus{border-color:var(--accent-color);box-shadow:0 0 0 3px #58a6ff26}.card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:6px;padding:16px}