:root{--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--bg:#f0f2f5;--surface:#ffffff;--border:#dfe1e6;--border-light:#ebecf0;--primary:#1a73e8;--primary-hover:#1557b0;--primary-light:#e8f0fe;--accent:#00875a;--accent-light:#e3fcef;--danger:#d93025;--danger-light:#fce8e6;--warning:#f9ab00;--warning-light:#fef7e0;--text:#202124;--text-secondary:#5f6368;--text-muted:#9aa0a6;--header-bg:linear-gradient(135deg, #1a73e8 0%, #1557b0 100%);--shadow-sm:0 1px 3px rgba(0,0,0,0.08);--shadow-md:0 4px 12px rgba(0,0,0,0.12);--shadow-lg:0 8px 28px rgba(0,0,0,0.16);--radius:8px;--radius-sm:6px;--radius-lg:12px;--transition:0.15s ease}*,::after,::before{margin:0;padding:0;box-sizing:border-box}html{font-size:14px;scroll-behavior:smooth}body{font-family:var(--font);color:var(--text);background:var(--bg);min-height:100vh;display:flex;flex-direction:column}.app-header{background:var(--header-bg);color:#fff;padding:0 24px;height:56px;display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-md);z-index:100;flex-shrink:0}.header-left{display:flex;align-items:center;gap:12px}.header-left h1{font-size:18px;font-weight:700;letter-spacing:-.3px}.logo-icon{font-size:20px}.header-subtitle{font-size:13px;opacity:.75}.header-right{display:flex;align-items:center;gap:12px}.user-info{display:flex;align-items:center;gap:8px;font-size:13px;opacity:.9}.user-avatar{width:28px;height:28px;border-radius:50%;border:2px solid rgba(255,255,255,.4)}.user-name{font-weight:500}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;font-family:var(--font);font-size:13px;font-weight:600;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:nowrap;text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover{background:#064;box-shadow:var(--shadow-sm);transform:translateY(-1px)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#b3261e}.btn-ghost{background:0 0;color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg);border-color:var(--text-muted)}.btn-white{background:rgba(255,255,255,.2);color:#fff;border:1px solid rgba(255,255,255,.3)}.btn-white:hover{background:rgba(255,255,255,.3)}.btn-google{background:#fff;color:var(--text);border:1px solid var(--border);padding:12px 28px;font-size:14px;box-shadow:var(--shadow-sm)}.btn-google:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-google img{width:18px;height:18px}.btn-lg{padding:14px 32px;font-size:15px;border-radius:var(--radius)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.hidden{display:none!important}.main-content{flex:1;display:flex;flex-direction:column;align-items:center;padding:48px 24px}.login-screen{text-align:center;max-width:480px}.login-icon{font-size:64px;margin-bottom:20px;animation:float 3s ease-in-out infinite}@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}.login-screen h2{font-size:24px;font-weight:700;margin-bottom:8px}.login-screen p{font-size:15px;color:var(--text-secondary);margin-bottom:28px;line-height:1.5}.app-screen{width:100%;max-width:1100px}.app-layout{display:flex;gap:24px;align-items:flex-start}.app-cards{flex:1;min-width:0;display:flex;flex-direction:column;gap:24px}.history-sidebar{width:320px;flex-shrink:0;position:sticky;top:80px}.history-list{list-style:none;max-height:480px;overflow-y:auto}.history-empty{padding:24px 20px;text-align:center;font-size:13px;color:var(--text-muted)}.history-item{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--border-light);transition:background var(--transition)}.history-item:last-child{border-bottom:none}.history-item:hover{background:var(--bg)}.history-item-info{flex:1;min-width:0}.history-item-name{font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-item-link{font-size:11px;color:var(--primary);text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}.history-item-link:hover{text-decoration:underline}.history-item-actions{display:flex;gap:4px;flex-shrink:0}.history-btn{width:28px;height:28px;border:none;background:0 0;font-size:14px;cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:background var(--transition)}.history-btn:hover{background:var(--border-light)}.card{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-light);overflow:hidden}.card-header{display:flex;align-items:center;gap:12px;padding:18px 24px;border-bottom:1px solid var(--border-light)}.card-icon{font-size:22px}.card-title{font-size:15px;font-weight:700;color:var(--text)}.card-body{padding:24px}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:40px 24px;text-align:center;cursor:pointer;transition:all .25s ease}.upload-zone:hover{border-color:var(--primary);background:var(--primary-light)}.upload-zone-icon{font-size:36px;margin-bottom:12px}.upload-zone h3{font-size:15px;font-weight:600;margin-bottom:4px}.upload-zone p{font-size:12px;color:var(--text-muted)}.result-box{background:var(--accent-light);border:1px solid var(--accent);border-radius:var(--radius);padding:16px 20px;display:flex;align-items:center;gap:12px}.result-box-icon{font-size:24px;flex-shrink:0}.result-box-content{flex:1;min-width:0}.result-box-title{font-size:13px;font-weight:600;color:var(--text);margin-bottom:4px}.result-box-link{font-size:12px;color:var(--primary);word-break:break-all;text-decoration:none}.result-box-link:hover{text-decoration:underline}.download-input-row{display:flex;gap:10px}.input-field{flex:1;font-family:var(--font);font-size:13px;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);outline:0;transition:border-color var(--transition),box-shadow var(--transition)}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(26,115,232,.15)}.progress-bar{width:100%;height:4px;background:var(--border-light);border-radius:2px;overflow:hidden;margin-top:16px}.progress-fill{height:100%;background:var(--primary);border-radius:2px;width:0%;transition:width .3s ease}.progress-fill.indeterminate{width:30%;animation:indeterminate 1.5s ease-in-out infinite}@keyframes indeterminate{0%{transform:translateX(-100%)}100%{transform:translateX(400%)}}.status-msg{font-size:13px;padding:10px 14px;border-radius:var(--radius-sm);margin-top:12px}.status-info{background:var(--primary-light);color:var(--primary)}.status-error{background:var(--danger-light);color:var(--danger)}.status-success{background:var(--accent-light);color:var(--accent)}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);z-index:500;display:flex;align-items:center;justify-content:center;padding:24px;animation:fadeIn .2s ease}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.modal-dialog{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:400px;animation:slideIn .25s ease}@keyframes slideIn{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--border-light)}.modal-header h2{font-size:16px;font-weight:700}.modal-close{width:32px;height:32px;border:none;background:0 0;font-size:20px;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}.modal-close:hover{background:var(--bg);color:var(--text)}.modal-body{padding:20px 24px}.modal-footer{display:flex;justify-content:flex-end;gap:10px;padding:16px 24px;border-top:1px solid var(--border-light)}.modal-label{display:block;font-size:12px;font-weight:600;text-transform:uppercase;color:var(--text-secondary);margin-bottom:8px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:#202124;color:#fff;padding:12px 24px;border-radius:var(--radius);font-size:13px;font-weight:500;box-shadow:var(--shadow-lg);opacity:0;transition:all .3s ease;z-index:1000;pointer-events:none}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}@media (max-width:640px){.app-header{padding:0 12px;height:48px}.header-left h1{font-size:15px}.header-subtitle{display:none}.user-name{display:none}.main-content{padding:24px 16px}.card-body{padding:16px}.download-input-row{flex-direction:column}.app-layout{flex-direction:column}.history-sidebar{width:100%;position:static}}