* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: #f0f2f5; }
.container { max-width: 960px; margin: 20px auto; background: #fff; padding: 25px; border-radius: 12px; box-shadow: 0 2px 10px rgba(0,0,0,.1); }
h1 { text-align: center; margin-bottom: 20px; }
nav { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
nav button { padding: 8px 16px; background: #e7e7e7; border: none; border-radius: 6px; cursor: pointer; }
.tab { display: none; }
.tab.active { display: block; }
input[type=text], input[type=file], select { width: 100%; padding: 10px; margin: 8px 0; border: 1px solid #ccc; border-radius: 6px; }
button { padding: 10px 20px; background: #007aff; color: #fff; border: none; border-radius: 6px; cursor: pointer; margin: 4px 4px 4px 0; }
pre { background: #f5f5f5; padding: 12px; border-radius: 6px; white-space: pre-wrap; }
table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
th { background: #f2f2f2; }
.msg { margin-top: 8px; padding: 8px; border-radius: 6px; }
.success { background: #d4edda; }
.error { background: #f8d7da; }