*{margin:0;padding:0;box-sizing:border-box}
body{font-family:system-ui,-apple-system,sans-serif;background:#0f172a;color:#e2e8f0;padding:30px 15px}
.container{max-width:800px;margin:0 auto}
.main-card{background:#1e293b;border-radius:18px;padding:28px;margin-bottom:20px;box-shadow:0 8px 32px rgba(0,0,0,0.25)}
.head-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}
.head-row h2{font-size:20px;color:#fff;font-weight:600}
.logout-btn{padding:6px 14px;border:1px solid #f87171;color:#f87171;border-radius:8px;text-decoration:none;font-size:14px;transition:0.2s}
.logout-btn:hover{background:#f87171;color:#0f172a}
.form-input{width:100%;padding:14px 16px;background:#334155;border:1px solid #475569;border-radius:12px;color:#fff;font-size:15px;margin-bottom:16px;outline:none}
.form-input:focus{border-color:#38bdf8}
.submit-btn{width:100%;padding:14px;background:#38bdf8;color:#0f172a;border:none;border-radius:12px;font-size:15px;font-weight:500;cursor:pointer;transition:all 0.2s}
.submit-btn:hover{opacity:0.9}
.tip-text{font-size:13px;color:#94a3b8;margin-top:12px}
.file-item{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid #334155;flex-wrap:wrap;gap:12px}
.file-item:last-child{border:none}
.file-info{flex:1;min-width:200px}
.file-name{color:#e2e8f0;font-size:14px;margin-bottom:4px;word-break:break-all}
.file-time{font-size:12px;color:#64748b}
.btn-group{display:flex;gap:8px;flex-wrap:wrap}
.copy-btn,.copy-btn1,.down-btn,.del-btn{padding:5px 12px;border-radius:6px;font-size:13px;text-decoration:none;border:1px solid}
.copy-btn{border-color:#ebca07;color:#ebca07}
.copy-btn:hover{background:#ebca07;color:#0f172a}
.copy-btn1{border-color:#38bdf8;color:#38bdf8}
.copy-btn1:hover{background:#38bdf8;color:#0f172a}
.down-btn{border-color:#34d399;color:#34d399}
.down-btn:hover{background:#34d399;color:#0f172a}
.del-btn{border-color:#f87171;color:#f87171}
.del-btn:hover{background:#f87171;color:#0f172a}
.qr-small{width:90px;border-radius:8px}
.error-tip{color:#f87171;margin-bottom:15px;font-size:14px}
.progress-box{display:none;margin-top:12px}
.progress-bar{width:100%;height:8px;background:#334155;border-radius:99px;overflow:hidden}
.progress-fill{height:100%;width:0%;background:#38bdf8;transition:width 0.2s ease}
.progress-text{margin-top:6px;font-size:13px;color:#a5b4fc;text-align:center}
.share-card{text-align:center;max-width:460px;margin:0 auto}
.share-title{margin:0 0 16px 0;color:#ffffff;font-size:22px}
.share-filename{color:#cbd5e1;margin:10px 0;word-break:break-all}
.share-tip{color:#94a3b8;margin:8px 0 20px}
.share-qr{border-radius:12px;margin:16px auto;max-width:280px;width:100%;display:block}
.share-buttons{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.share-btn{padding:14px 20px;border:none;border-radius:10px;font-size:15px;font-weight:500;cursor:pointer;text-align:center;text-decoration:none}
.btn-download{background:#00b42a;color:#fff}
.btn-copy{background:#38bdf8;color:#0f172a}
.btn-copy1{background:#ebca07;color:#0f172a}