*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'PingFang SC',sans-serif;background:#f5f5f5;color:#333}
#app{display:flex;min-height:100vh}
nav{width:200px;background:#1a1a2e;color:#fff;padding:20px 0;flex-shrink:0}
nav h1{font-size:18px;padding:0 16px 20px;border-bottom:1px solid #333}
.tab{display:block;padding:12px 16px;color:#aaa;text-decoration:none;font-size:14px}
.tab:hover{background:#16213e;color:#fff}
.tab.active{background:#0f3460;color:#ffd93d}
main{flex:1;padding:24px;overflow-y:auto}
.section{display:none}
.section.active{display:block}
h2{font-size:20px;margin-bottom:16px}
.card{background:#fff;border-radius:8px;padding:20px;margin-bottom:16px;box-shadow:0 1px 3px rgba(0,0,0,.1)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border-radius:8px;padding:20px;text-align:center;box-shadow:0 1px 3px rgba(0,0,0,.1)}
.stat-card .num{font-size:36px;font-weight:bold;color:#0f3460}
.stat-card .label{font-size:14px;color:#888;margin-top:4px}
table{width:100%;border-collapse:collapse}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid #eee;font-size:14px}
th{background:#f9f9f9;font-weight:600}
.btn{padding:8px 16px;border:none;border-radius:6px;cursor:pointer;font-size:14px}
.btn-primary{background:#0f3460;color:#fff}
.btn-danger{background:#ff6b6b;color:#fff}
.btn-sm{padding:4px 10px;font-size:12px}
input,textarea,select{padding:8px 12px;border:1px solid #ddd;border-radius:6px;font-size:14px;width:100%}
textarea{resize:vertical;min-height:80px}
.form-row{margin-bottom:12px}
.form-row label{display:block;font-size:13px;color:#666;margin-bottom:4px}
.form-row-inline{display:flex;gap:12px}
.form-row-inline>*{flex:1}
.upload-area{border:2px dashed #ddd;border-radius:8px;padding:20px;text-align:center;cursor:pointer;color:#888}
.upload-area:hover{border-color:#0f3460;color:#0f3460}
.preview-img{max-width:120px;max-height:120px;border-radius:8px;margin-top:8px}
.badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:12px}
.badge-win{background:#d4edda;color:#155724}
.badge-lose{background:#f8d7da;color:#721c24}