:root{--bg: #f4f5f9;--card-bg: #ffffff;--border: #e3e5ec;--text: #1a1d29;--text-muted: #6b7280;--accent: #4f46e5;--accent-hover: #4338ca;--danger: #dc2626;--danger-bg: #fef2f2;--radius: 10px;--shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .04)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif}#root{min-height:100vh}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:var(--card-bg);border-bottom:1px solid var(--border)}.header-actions{display:flex;gap:4px}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:17px;letter-spacing:-.01em}.brand-mark{width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,var(--accent),#818cf8);flex-shrink:0}.app-main{flex:1;display:flex;justify-content:center;padding:48px 20px}.auth-wrap{width:100%;max-width:380px;display:flex;flex-direction:column;align-items:center;gap:16px}.auth-card{width:100%;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}.auth-title{font-size:19px;font-weight:600;margin:0 0 22px}.auth-form{display:flex;flex-direction:column;gap:16px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text-muted)}.input{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;color:var(--text);background:#fff;outline:none;transition:border-color .15s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #4f46e51f}.field-checkbox{flex-direction:row-reverse;align-items:flex-start;gap:10px;color:var(--text);line-height:1.5}.checkbox{width:16px;height:16px;margin-top:2px;accent-color:var(--accent);flex-shrink:0}.link-btn{background:none;border:none;color:var(--accent);font-size:13px;cursor:pointer;padding:4px}.link-btn:hover{color:var(--accent-hover);text-decoration:underline}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 16px;border-radius:8px;border:1px solid transparent;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .15s,border-color .15s,opacity .15s}.btn-block{width:100%}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:#fff;border-color:var(--border);color:var(--text)}.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}.btn-ghost{background:none;border-color:transparent;color:var(--text-muted);padding:6px 10px;font-size:13px}.btn-ghost:hover{background:var(--bg);color:var(--text)}.btn-danger:hover{background:var(--danger-bg);color:var(--danger)}.app-main-wide{align-items:flex-start}.dashboard{width:100%;max-width:640px;display:flex;flex-direction:column;gap:20px}.upload-bar{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;display:flex;flex-direction:column;gap:10px}.upload-label{position:relative;overflow:hidden}.upload-input{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;margin:0;padding:0;border:0;opacity:0;cursor:pointer}.progress-track{height:6px;border-radius:999px;background:var(--border);overflow:hidden}.progress-fill{height:100%;background:var(--accent);transition:width .15s ease}.retry-btn{margin-left:8px;padding:2px 10px;background:#fff}.file-list{list-style:none;margin:0;padding:0;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.file-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border);flex-wrap:wrap}.file-list li:last-of-type{border-bottom:none}.file-info{display:flex;align-items:center;gap:10px;min-width:0}.file-icon{width:20px;height:20px;flex-shrink:0;border-radius:4px;background:#eef0ff;border:1px solid #dde0fb}.file-name{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-actions{display:flex;gap:2px;flex-shrink:0}.share-info,.share-file-row{width:100%;margin:10px 0 0;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;font-size:13px;word-break:break-all}.share-file-row{display:flex;align-items:center;justify-content:space-between;gap:12px;word-break:normal}.empty-state{padding:40px 18px;text-align:center;color:var(--text-muted);font-size:13px}.form-error{margin:0;padding:10px 12px;background:var(--danger-bg);color:var(--danger);border-radius:8px;font-size:13px}.form-success{margin:0 0 16px;padding:10px 12px;background:#ecfdf5;color:#047857;border-radius:8px;font-size:13px}