*{box-sizing:border-box}
body{font-family:'Segoe UI',Arial,Helvetica,sans-serif;margin:0;line-height:1.65;color:#222;background:#f1f5f9}
header{background:linear-gradient(135deg,#04AA6D,#028a58);color:#fff;padding:28px 20px}
header h1{margin:0 0 6px}header p{margin:0;opacity:.92}
nav{background:#282A35;color:#fff;padding:10px 20px;position:sticky;top:0;z-index:10}
nav a{color:#fff;margin-right:14px;text-decoration:none;font-weight:600}
nav a:hover{text-decoration:underline;color:#04AA6D;background:#fff;border-radius:4px;padding:2px 6px}
main{max-width:960px;margin:20px auto;background:#fff;padding:28px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.08)}
pre{background:#1e293b;color:#e2e8f0;padding:14px;overflow:auto;border-radius:8px;border-left:5px solid #04AA6D}
code{font-family:Consolas,'Courier New',monospace;background:#eef2f7;padding:1px 5px;border-radius:4px}
pre code{background:transparent;padding:0}
.box{background:#D9EEE1;padding:14px 16px;margin:14px 0;border-radius:8px;border:1px solid #04AA6D55}
.demo{border:2px dashed #94a3b8;padding:14px;margin:14px 0;border-radius:8px;background:#f8fafc}
table{border-collapse:collapse;width:100%;margin:10px 0}
th,td{border:1px solid #cbd5e1;padding:9px}th{background:#04AA6D;color:#fff}
footer{background:#282A35;color:#fff;text-align:center;padding:14px;margin-top:24px}
.btn{display:inline-block;background:#04AA6D;color:#fff!important;padding:9px 15px;border-radius:6px;text-decoration:none;margin:6px 4px 0;font-weight:600}
.btn:hover{background:#028a58}
@media(max-width:640px){main{margin:0;border-radius:0;padding:18px}}