.activity-search{display:flex;align-items:center;gap:12px;margin-bottom:12px}.search-input-wrap{flex:1;background:var(--card);border:1px solid var(--border);border-radius:999px;display:flex;align-items:center;padding:8px 14px;box-shadow:var(--shadow);position:relative}.search-input-wrap input{border:none;outline:0;flex:1;background:0 0;font-size:14px;padding-right:32px}.search-icon{margin-right:6px;color:var(--muted)}.publish-btn{background:linear-gradient(135deg,var(--brand) 0,var(--brand-2) 100%);color:#fff;border:none;border-radius:999px;padding:8px 16px;font-size:14px;cursor:pointer;box-shadow:0 6px 12px rgba(79,70,229,.2)}.activity-filter{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px;flex-wrap:wrap}.filter-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}#categorySelect{border:none;background:#f8fafc;padding:6px 10px;border-radius:8px;font-size:13px}.filter-toggle{border:none;background:#ede9fe;color:#6d28d9;padding:6px 12px;border-radius:999px;font-size:13px;cursor:pointer}.filter-toggle.active{background:#6d28d9;color:#fff}.filter-tabs{display:flex;gap:10px}.filter-tab{border:none;background:0 0;font-size:13px;color:var(--muted);padding:4px 8px;border-bottom:2px solid transparent;cursor:pointer}.filter-tab.active{color:#6d28d9;border-color:#6d28d9}.activity-list{margin-top:10px}.activity-card{background:var(--card);border-radius:var(--radius);padding:16px;margin-bottom:14px;box-shadow:var(--shadow);border:1px solid var(--border);transition:all .3s;display:flex;gap:14px}.activity-card:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(15,23,42,.12)}.activity-card.official{border-color:rgba(99,102,241,.35);box-shadow:0 12px 26px rgba(79,70,229,.12)}.activity-card.alumni{border-color:rgba(14,165,233,.35)}.activity-cover{width:74px;height:96px;border-radius:10px;object-fit:cover;background:#f1f5f9;border:1px solid var(--border);flex-shrink:0}.activity-body{flex:1}.activity-title{font-size:16px;font-weight:700;color:var(--text);margin-bottom:4px}.activity-meta{font-size:13px;color:var(--muted);margin-bottom:4px}.activity-info{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.activity-footer{display:flex;align-items:center;justify-content:space-between;margin-top:10px;font-size:12px;color:var(--muted)}.activity-status{padding:4px 10px;border-radius:999px;font-size:12px}.activity-status.open{background:#dcfce7;color:#166534}.activity-status.full{background:#fde68a;color:#b45309}.activity-status.closed,.activity-status.ended{background:#fee2e2;color:#b91c1c}.activity-category{color:#6d28d9;font-weight:600}.activity-category.official{color:#4338ca}.activity-category.alumni{color:#0ea5e9}.activity-category.other{color:#64748b}.register-btn{background:#6d28d9;color:#fff;border:none;padding:6px 12px;border-radius:8px;font-size:12px}.empty-activities{text-align:center;padding:60px 20px;color:#999}.empty-activities .empty-icon{font-size:64px;margin-bottom:20px}.empty-activities p{font-size:15px}.modal .modal-content{max-width:380px}.modal-header h3{font-size:16px;font-weight:600;color:var(--text)}.modal-body .form-group{margin-bottom:15px}.modal-body .form-group label{font-size:13px;margin-bottom:6px}.modal-body .form-input{padding:10px 12px;font-size:14px}.modal-body .form-actions{display:flex;gap:10px;margin-top:20px}.modal-body .form-actions .btn{flex:1;padding:12px}.cover-upload{display:flex;flex-direction:column;gap:6px}.cover-upload input[type=file]{font-size:12px}.cover-tip{font-size:12px;color:var(--muted)}.cover-preview{width:100%;max-height:160px;object-fit:cover;border-radius:10px;margin-top:8px;border:1px solid var(--border)}.publish-preview-card{display:flex;gap:14px;background:#fff;border-radius:16px;padding:12px;border:1px solid var(--border);box-shadow:0 10px 20px rgba(15,23,42,.08);margin-bottom:16px}.publish-preview-card.official{border-color:rgba(99,102,241,.35)}.publish-preview-card.alumni{border-color:rgba(14,165,233,.35)}.preview-cover{width:92px;height:120px;border-radius:12px;overflow:hidden;background:#f1f5f9;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--muted);flex-shrink:0}.preview-cover img{width:100%;height:100%;object-fit:cover}.preview-body{display:flex;flex-direction:column;gap:6px}.preview-title{font-size:15px;font-weight:700;color:var(--text)}.preview-meta{font-size:12px;color:var(--muted);display:flex;flex-direction:column;gap:4px}.preview-footer{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}.preview-category{padding:4px 10px;border-radius:999px;background:#ede9fe;color:#6d28d9;font-weight:600}.preview-category.official{background:#e0e7ff;color:#4338ca}.preview-category.alumni{background:#e0f2fe;color:#0284c7}.preview-category.other{background:#f1f5f9;color:#64748b}.preview-status{background:#dcfce7;color:#166534;padding:4px 8px;border-radius:999px}.publish-modal{max-width:100vw;width:100%;height:100vh;border-radius:0;background:linear-gradient(180deg,#fff 0,#f8f9ff 100%);border:none;box-shadow:none}.publish-modal .modal-body{height:calc(100vh - 64px);overflow-y:auto;padding:20px 18px 28px}.publish-tip{background:#eef2ff;color:#4338ca;font-size:12px;padding:8px 12px;border-radius:10px;border:1px dashed rgba(99,102,241,.35);margin-bottom:14px}.publish-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 16px}.publish-grid .form-group{margin-bottom:0;display:flex;align-items:center;gap:12px}.publish-grid .form-group label{font-weight:600;color:var(--text);min-width:96px}.publish-grid .form-input,.publish-grid .form-textarea,.publish-grid select{border-radius:12px;border:1px solid var(--border);background:#fff;box-shadow:inset 0 1px 2px rgba(15,23,42,.04);flex:1}.publish-grid .form-input:focus,.publish-grid .form-textarea:focus,.publish-grid select:focus{outline:0;border-color:#6366f1;box-shadow:0 0 0 3px rgba(99,102,241,.15)}.publish-grid .form-textarea{padding:10px 12px;font-size:13px;min-height:96px;resize:vertical;flex:1}.publish-grid .span-2{grid-column:span 2}.publish-grid .stack{flex-direction:column;align-items:flex-start}.publish-grid .stack .form-input,.publish-grid .stack .form-textarea,.publish-grid .stack select{width:100%}.publish-modal .submit-btn{width:100%;margin-top:16px;padding:12px 16px;border-radius:12px;background:linear-gradient(135deg,#6366f1 0,#8b5cf6 100%);border:none;color:#fff;font-size:15px;font-weight:600;box-shadow:0 10px 24px rgba(79,70,229,.3);cursor:pointer}.publish-modal .submit-btn:hover{transform:translateY(-1px)}@media (max-width:640px){.publish-modal{max-width:100vw}.publish-grid{grid-template-columns:1fr}.publish-grid .span-2{grid-column:span 1}.publish-grid .form-group{flex-direction:column;align-items:flex-start}.publish-grid .form-group label{min-width:0}.publish-preview-card{flex-direction:column}.preview-cover{width:100%;height:160px}}@media (max-width:560px){.activity-card{flex-direction:column}.activity-cover{width:100%;height:160px}}