:root{--bg: #0b0e14;--bg-panel: #131722;--bg-panel-2: #1a2030;--border: #232b3d;--text: #e6e9f0;--text-dim: #8b93a7;--accent: #4f8cff;--accent-strong: #2f6ef0;--green: #3ecf8e;--red: #ff5d5d;--yellow: #ffc95d;--radius: 10px;--mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,sans-serif;font-size:15px;line-height:1.5}#root{min-height:100vh;display:flex;flex-direction:column}a{color:var(--accent);text-decoration:none}.app{max-width:760px;margin:0 auto;padding:16px 16px 40px;width:100%;flex:1}.header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0 10px}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;letter-spacing:1px}.brand .logo{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--accent),var(--green));display:inline-flex;align-items:center;justify-content:center;font-size:13px;color:#08121f}.storage-pill{font-size:12.5px;color:var(--text-dim);background:var(--bg-panel);border:1px solid var(--border);border-radius:999px;padding:5px 12px;white-space:nowrap}.storage-pill b{color:var(--text);font-weight:600}.mode-switch{display:grid;grid-template-columns:1fr 1fr;gap:4px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);padding:4px;margin-bottom:18px}.mode-switch button{border:0;background:transparent;color:var(--text-dim);font-size:14.5px;font-weight:600;padding:9px 0;border-radius:7px;cursor:pointer;transition:all .15s}.mode-switch button.active{background:var(--accent-strong);color:#fff}.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.card{background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px}.card+.card{margin-top:12px}.card h3{margin:0 0 8px;font-size:13px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.8px;font-weight:600}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:42px 20px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:var(--bg-panel)}.dropzone:hover,.dropzone.dragging{border-color:var(--accent);background:var(--bg-panel-2)}.dropzone .big{font-size:16px;font-weight:600;margin-bottom:6px}.dropzone .hint{font-size:13px;color:var(--text-dim)}.btn{border:1px solid var(--border);background:var(--bg-panel-2);color:var(--text);font-size:14px;font-weight:600;border-radius:8px;padding:9px 18px;cursor:pointer;transition:all .15s}.btn:hover:not(:disabled){border-color:var(--accent)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}.btn.primary:hover:not(:disabled){background:var(--accent)}.btn.danger{background:transparent;border-color:var(--red);color:var(--red)}.btn.danger:hover:not(:disabled){background:#ff5d5d1f}.btn.small{padding:5px 12px;font-size:13px}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.progress-track{height:10px;background:var(--bg-panel-2);border-radius:999px;overflow:hidden;border:1px solid var(--border)}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--green));border-radius:999px;transition:width .2s ease}.progress-meta{display:flex;justify-content:space-between;font-size:12.5px;color:var(--text-dim);margin-top:6px;flex-wrap:wrap;gap:4px}.progress-meta b{color:var(--text);font-weight:600}.file-list{margin:12px 0 0;padding:0;list-style:none;max-height:220px;overflow-y:auto}.file-list li{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:8px 10px;border-bottom:1px solid var(--border);font-size:13.5px}.file-list li:last-child{border-bottom:0}.file-list .name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-list .size{color:var(--text-dim);white-space:nowrap;font-variant-numeric:tabular-nums}.key-text{font-family:var(--mono);font-size:12.5px;line-height:1.7;word-break:break-all;background:var(--bg-panel);border:1px solid var(--border);border-radius:7px;padding:10px 12px;-webkit-user-select:all;user-select:all;margin:0}.link-text{font-family:var(--mono);font-size:13px;color:var(--accent);word-break:break-all;margin:0}.copy-state{font-size:12px;color:var(--green);margin-left:6px}.countdown{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:15px;font-weight:700}.countdown.urgent{color:var(--red)}.status-line{font-size:13.5px;color:var(--text-dim);margin:10px 0 4px}.status-line b{color:var(--text)}.error-box{background:#ff5d5d14;border:1px solid rgba(255,93,93,.35);color:#ffb3b3;border-radius:8px;padding:12px 14px;font-size:13.5px;margin-top:12px}.error-box .title{font-weight:700;color:var(--red);margin-bottom:4px}.success-box{background:#3ecf8e14;border:1px solid rgba(62,207,142,.35);color:var(--green);border-radius:8px;padding:12px 14px;font-size:13.5px}.warn-box{background:#ffc95d14;border:1px solid rgba(255,201,93,.35);color:var(--yellow);border-radius:8px;padding:12px 14px;font-size:13.5px}.input-key{width:100%;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--mono);font-size:13px;padding:12px 14px;outline:none;resize:vertical;min-height:64px}.input-key:focus{border-color:var(--accent)}.spinner{display:inline-block;width:14px;height:14px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;vertical-align:-2px;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}.footer{text-align:center;color:var(--text-dim);font-size:12.5px;padding:22px 0 8px;letter-spacing:.5px}.divider{height:1px;background:var(--border);margin:14px 0}.muted{color:var(--text-dim)}.center{text-align:center}.mt12{margin-top:12px}.flex-between{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}.step-list{margin:10px 0;padding:0;list-style:none}.step-list li{padding:5px 0;font-size:13.5px;color:var(--text-dim)}.step-list li.done{color:var(--green)}.step-list li.active{color:var(--text);font-weight:600}.step-list li.active:before{content:"▸ ";color:var(--accent)}.step-list li.done:before{content:"✓ "}.step-list li:before{content:"· "}