* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, "Segoe UI", "PingFang SC", sans-serif; background: #f5f7fa; color: #2c3e50; line-height: 1.6; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; background: #2c3e50; color: #fff; }
.topbar a { color: #ecf0f1; text-decoration: none; margin-left: 16px; }
.topbar .brand { font-size: 20px; font-weight: bold; }
.container { max-width: 1000px; margin: 24px auto; padding: 0 16px; }
.filter form { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.filter select, .filter input, .filter button { padding: 8px 12px; border: 1px solid #d0d7de; border-radius: 6px; background: #fff; }
.filter button { background: #3498db; color: #fff; border: none; cursor: pointer; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.card { display: block; padding: 16px; background: #fff; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); text-decoration: none; color: #2c3e50; transition: transform 0.15s; }
.card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.12); }
.card-name { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.card-meta { font-size: 12px; color: #95a5a6; margin-bottom: 8px; }
.card-desc { font-size: 13px; color: #7f8c8d; }
.empty { padding: 40px; text-align: center; color: #95a5a6; }
.detail { background: #fff; padding: 32px; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.detail h1 { margin-bottom: 16px; }
.detail .meta { display: flex; flex-wrap: wrap; gap: 16px; color: #7f8c8d; font-size: 14px; margin-bottom: 24px; }
.detail .desc { margin-bottom: 24px; }
.btn { display: inline-block; padding: 10px 24px; background: #27ae60; color: #fff; text-decoration: none; border-radius: 6px; margin-right: 8px; }
.btn-link { display: inline-block; padding: 10px 24px; background: #bdc3c7; color: #2c3e50; text-decoration: none; border-radius: 6px; }
.upload-form { background: #fff; padding: 24px; border-radius: 8px; display: flex; flex-direction: column; gap: 12px; max-width: 500px; }
.upload-form label { display: flex; flex-direction: column; font-size: 14px; color: #7f8c8d; }
.upload-form input, .upload-form textarea { margin-top: 4px; padding: 8px; border: 1px solid #d0d7de; border-radius: 6px; }
.upload-form button { padding: 10px; background: #3498db; color: #fff; border: none; border-radius: 6px; cursor: pointer; font-size: 16px; }
.error { color: #e74c3c; padding: 8px; background: #fadbd8; border-radius: 4px; }
.foot { text-align: center; padding: 24px; color: #95a5a6; font-size: 13px; }

.user-tag { display: inline-block; padding: 4px 10px; background: rgba(255,255,255,0.15); border-radius: 4px; font-size: 13px; }
.auth-form { background: #fff; padding: 32px; border-radius: 8px; max-width: 400px; margin: 0 auto; box-shadow: 0 2px 8px rgba(0,0,0,0.1); display: flex; flex-direction: column; gap: 14px; }
.auth-form h1 { margin-bottom: 8px; font-size: 24px; }
.auth-form label { display: flex; flex-direction: column; font-size: 14px; color: #7f8c8d; gap: 4px; }
.auth-form input { margin-top: 4px; padding: 10px; border: 1px solid #d0d7de; border-radius: 6px; font-size: 15px; }
.auth-form button { padding: 12px; background: #3498db; color: #fff; border: none; border-radius: 6px; cursor: pointer; font-size: 16px; margin-top: 8px; }
.auth-form button:hover { background: #2980b9; }
.auth-alt { text-align: center; font-size: 14px; color: #95a5a6; margin-top: 8px; }
.auth-alt a { color: #3498db; }
.btn-login-required { background: #e67e22; }

.role-badge { display: inline-block; font-size: 10px; padding: 1px 5px; background: #f39c12; color: #fff; border-radius: 3px; margin-left: 4px; vertical-align: middle; }
.admin-hint { background: #fff3cd; color: #856404; padding: 8px; border-radius: 4px; font-size: 13px; border: 1px solid #ffc107; }