*{box-sizing:border-box;margin:0;padding:0}:root{--bg-color:#f5f5f5;--card-bg:#fff;--text-primary:#333;--text-secondary:#666;--border-color:#e0e0e0;--accent-color:#555;--accent-hover:#444;--success-color:#4a9c6d;--error-color:#c75450;--radius:8px;--shadow:0 2px 8px #00000014}body{background-color:var(--bg-color);color:var(--text-primary);justify-content:center;align-items:center;min-height:100vh;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;line-height:1.6;display:flex}.container{width:100%;max-width:480px}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}h1{text-align:center;margin-bottom:8px;font-size:24px;font-weight:600}h2{margin-bottom:8px;font-size:20px;font-weight:600}.subtitle{color:var(--text-secondary);text-align:center;margin-bottom:24px;font-size:14px}.file-drop-area{border:2px dashed var(--border-color);border-radius:var(--radius);text-align:center;cursor:pointer;margin-bottom:16px;padding:32px;transition:border-color .2s,background-color .2s}.file-drop-area:hover{border-color:var(--accent-color);background-color:#fafafa}.file-input{display:none}.file-label{cursor:pointer;color:var(--text-secondary);display:block}.file-label svg{width:48px;height:48px;color:var(--border-color);margin-bottom:12px}.file-name{color:var(--text-primary);word-break:break-all;margin-top:12px;font-weight:500}.options-container{border-radius:var(--radius);background-color:#fafafa;margin-bottom:16px;padding:16px}.option-row{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.option-row:last-child{margin-bottom:0}.option-row label{color:var(--text-primary);font-size:14px}.ttl-select{border:1px solid var(--border-color);border-radius:var(--radius);color:var(--text-primary);cursor:pointer;background-color:#fff;padding:8px 12px;font-size:14px}.ttl-select:focus{border-color:var(--accent-color);outline:none}.ttl-select:disabled{background-color:var(--border-color);cursor:not-allowed}.checkbox-label{cursor:pointer;align-items:center;gap:8px;display:flex}.checkbox-label input[type=checkbox]{cursor:pointer;width:18px;height:18px}.btn{color:#fff;background-color:var(--accent-color);border-radius:var(--radius);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;width:100%;padding:12px 24px;font-size:15px;font-weight:500;text-decoration:none;transition:background-color .2s;display:inline-flex}.btn:hover{background-color:var(--accent-hover)}.btn:disabled{background-color:var(--border-color);cursor:not-allowed}.btn-secondary{color:var(--text-primary);border:1px solid var(--border-color);background-color:#0000}.btn-secondary:hover{background-color:#f5f5f5}.progress-container{margin-top:16px;display:none}.progress-container.visible{display:block}.progress-bar{background-color:var(--border-color);border-radius:3px;height:6px;overflow:hidden}.progress-fill{background-color:var(--success-color);width:0%;height:100%;transition:width .2s}.progress-text{color:var(--text-secondary);text-align:center;margin-top:8px;font-size:13px}.error-message{border:1px solid var(--error-color);border-radius:var(--radius);color:var(--error-color);background-color:#fdf2f2;margin-top:16px;padding:12px;font-size:14px;display:none}.error-message.visible{display:block}.file-info{margin-bottom:24px}.file-info-item{border-bottom:1px solid var(--border-color);justify-content:space-between;padding:12px 0;display:flex}.file-info-item:last-child{border-bottom:none}.file-info-label{color:var(--text-secondary);font-size:14px}.file-info-value{word-break:break-all;text-align:right;max-width:60%;font-size:14px;font-weight:500}.url-container{gap:8px;margin-top:24px;display:flex}.url-input{border:1px solid var(--border-color);border-radius:var(--radius);color:var(--text-secondary);background-color:#fafafa;flex:1;padding:10px 12px;font-family:monospace;font-size:14px}.url-input:focus{border-color:var(--accent-color);outline:none}.btn-copy{white-space:nowrap;padding:10px 16px;font-size:14px}.btn-download{margin-top:24px}.file-status{border-radius:4px;padding:4px 10px;font-size:12px;font-weight:500;display:inline-block}.file-status.active{color:var(--success-color);background-color:#e8f5e9}.file-status.expired,.file-status.consumed{color:var(--error-color);background-color:#fdf2f2}.footer{text-align:center;margin-top:24px}.footer a{color:var(--text-secondary);font-size:14px;text-decoration:none}.footer a:hover{text-decoration:underline}