:root{color-scheme:light dark;--bg:#f4f6f9;--panel:#fff;--panel-2:#f8fafc;--text:#172033;--muted:#657084;--border:#dce2ea;--accent:#2457d6;--accent-hover:#1945b8;--accent-soft:#eaf0ff;--button-text:#fff;--success:#147a4b;--danger:#b42318;--warning:#9a6700;--shadow:0 10px 28px rgba(24,39,75,.07);--shadow-soft:0 4px 14px rgba(24,39,75,.05)}
html[data-theme="dark"]{--bg:#0f1218;--panel:#191e27;--panel-2:#151a22;--text:#f2f5f9;--muted:#a9b2c1;--border:#303847;--accent:#3974e8;--accent-hover:#4f86f0;--accent-soft:#1d2b47;--button-text:#fff;--success:#5ed19a;--danger:#ff8f88;--warning:#f0bd55;--shadow:0 12px 32px rgba(0,0,0,.18);--shadow-soft:0 4px 18px rgba(0,0,0,.14);color-scheme:dark}
html[data-theme="light"]{color-scheme:light}
@media(prefers-color-scheme:dark){html[data-theme="system"]{--bg:#0f1218;--panel:#191e27;--panel-2:#151a22;--text:#f2f5f9;--muted:#a9b2c1;--border:#303847;--accent:#3974e8;--accent-hover:#4f86f0;--accent-soft:#1d2b47;--button-text:#fff;--success:#5ed19a;--danger:#ff8f88;--warning:#f0bd55;--shadow:0 12px 32px rgba(0,0,0,.18);--shadow-soft:0 4px 18px rgba(0,0,0,.14)}}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:15px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);transition:background-color .18s ease,color .18s ease}a{color:var(--accent);text-decoration:none;transition:color .15s ease,opacity .15s ease}a:hover{color:var(--accent-hover)}h1,h2,h3{line-height:1.18;letter-spacing:-.025em}h1{font-size:30px}h2{font-size:21px}.topbar{display:flex;justify-content:space-between;align-items:center;min-height:68px;padding:0 30px;background:color-mix(in srgb,var(--panel) 94%,transparent);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;color:var(--text);letter-spacing:-.01em}.brand:hover{color:var(--text)}.brand-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--accent);color:#fff;font-size:14px;box-shadow:0 4px 12px rgba(36,87,214,.28)}.main-nav{display:flex;gap:7px;align-items:center}.main-nav>a,.nav-muted{padding:9px 11px;border-radius:9px;font-size:14.5px;font-weight:600}.main-nav>a:hover{background:var(--accent-soft)}.nav-muted{color:var(--muted);font-weight:500}.main-nav form{margin:0}.logout-button{display:inline-flex;align-items:center;gap:6px;background:transparent;color:var(--text);border:1px solid var(--border);padding:8px 11px;font-weight:650}.logout-button:hover{background:var(--panel-2);border-color:color-mix(in srgb,var(--border) 60%,var(--text))}.container{max-width:1180px;margin:42px auto 70px;padding:0 22px}.card,.table-card{background:var(--panel);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-soft)}.card{padding:24px}.table-card{overflow:auto}.narrow{max-width:560px;margin:auto}.narrow-wide{max-width:760px;margin:auto}.stack{display:grid;gap:17px}.stack label{display:grid;gap:7px;font-weight:650}input,select,button{font:inherit;border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:var(--panel);color:var(--text);transition:border-color .15s ease,box-shadow .15s ease,background-color .15s ease,transform .15s ease}input:focus,select:focus,button:focus-visible,.dropzone:focus-visible{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:10px;padding:10px 15px;font-weight:750;cursor:pointer;transition:background-color .15s ease,transform .15s ease,box-shadow .15s ease;border:1px solid transparent}.button-primary,button:not(.logout-button):not(.button-secondary){background:var(--accent);color:var(--button-text);box-shadow:0 4px 12px rgba(36,87,214,.18)}.button-primary:hover,button:not(.logout-button):not(.button-secondary):hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px)}.button-secondary{background:var(--panel);color:var(--text);border-color:var(--border);box-shadow:none}.button-secondary:hover{background:var(--panel-2);color:var(--text)}button:disabled{opacity:.6;cursor:wait;transform:none}.button-small{padding:7px 10px;font-size:13px;white-space:nowrap}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.dashboard-grid{margin:24px 0 34px}.metric{display:grid;grid-template-columns:auto 1fr;grid-template-areas:"icon value" "icon label";column-gap:14px;align-items:center}.metric-icon{grid-area:icon;display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--accent-soft);color:var(--accent);font-weight:900}.metric-value{grid-area:value;font-size:28px;font-weight:850;line-height:1}.metric-label{grid-area:label;color:var(--muted);font-size:13px}.alert{padding:11px 13px;border-radius:10px;background:#7f1d1d;color:white;margin-bottom:16px}.muted{color:var(--muted)}.small{font-size:12px}.eyebrow{display:inline-block;margin-bottom:6px;text-transform:uppercase;letter-spacing:.09em;font-size:11px;font-weight:800;color:var(--accent)}.page-heading,.section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.page-heading h1,.section-heading h2{margin:0}.page-heading p{margin:7px 0 0;max-width:760px}.section-heading{margin-top:31px}.heading-actions{display:flex;align-items:center;gap:9px}.heading-actions form{margin:0}.info-box{background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 20%,var(--border));border-radius:11px;padding:13px 14px;color:var(--muted)}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--border);vertical-align:top}tr:last-child td{border-bottom:0}tbody tr{transition:background-color .12s ease}tbody tr:hover{background:color-mix(in srgb,var(--panel-2) 70%,transparent)}th{font-size:11px;text-transform:uppercase;letter-spacing:.065em;color:var(--muted)}.status{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:999px;padding:4px 9px;font-size:12px;text-transform:capitalize;white-space:nowrap;background:var(--panel-2)}.status-dot{width:7px;height:7px;border-radius:50%;background:currentColor}.status-completed{color:var(--success)}.status-failed{color:var(--danger)}.status-completed_with_warnings{color:var(--warning)}.status-processing{color:var(--accent)}.status-queued{color:var(--warning)}.status-cancelled{color:var(--muted)}.status-uploading{color:var(--accent)}.error-text{color:var(--danger);font-size:12px;margin-top:5px}.stage-text{color:var(--muted);font-size:12px;margin-top:5px}.empty-state{text-align:center;padding:45px 24px}.back-link{margin-bottom:8px}.quick-convert{display:grid;grid-template-columns:minmax(260px,.85fr) minmax(380px,1.15fr);gap:30px;align-items:center;padding:28px;margin-bottom:24px;box-shadow:var(--shadow)}.quick-convert h2{margin:0 0 8px;font-size:25px}.quick-convert p{margin:0}.upload-form{display:grid;gap:13px}.dropzone{min-height:170px;display:flex!important;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:5px;padding:24px;border:2px dashed color-mix(in srgb,var(--border) 75%,var(--accent));border-radius:15px;background:var(--panel-2);cursor:pointer;font-weight:400!important;transition:border-color .16s ease,background-color .16s ease,transform .16s ease}.dropzone:hover,.dropzone.is-dragging{border-color:var(--accent);background:var(--accent-soft);transform:translateY(-1px)}.dropzone.has-files{border-style:solid;border-color:color-mix(in srgb,var(--success) 60%,var(--border))}.file-input{position:absolute;inline-size:1px;block-size:1px;opacity:0;pointer-events:none}.dropzone-icon{font-size:29px;color:var(--accent);line-height:1}.dropzone-title{font-size:16px;font-weight:780}.dropzone-subtitle{font-size:13px;color:var(--muted)}.dropzone-selection{margin-top:7px;font-size:12px;font-weight:700;color:var(--accent);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.upload-progress{display:grid;gap:7px}.progress-row{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted)}.progress-track{height:8px;border-radius:999px;background:color-mix(in srgb,var(--border) 75%,transparent);overflow:hidden}.progress-track>span{display:block;height:100%;width:0;border-radius:inherit;background:var(--accent);transition:width .22s ease}.progress-track-large{height:10px;margin:16px 0}.batch-live-card{margin-bottom:18px}.live-header{display:flex;align-items:center;justify-content:space-between;gap:16px}.live-title{display:flex;align-items:center;gap:9px;font-size:17px;text-transform:capitalize}.activity-pulse{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 50%,transparent);animation:pulse 1.8s infinite}.batch-counts{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--muted)}.actions-cell{display:flex;align-items:center;gap:7px}.actions-cell form{margin:0}.conversion-card{box-shadow:var(--shadow)}@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 45%,transparent)}70%{box-shadow:0 0 0 8px transparent}100%{box-shadow:0 0 0 0 transparent}}@media(max-width:900px){.quick-convert{grid-template-columns:1fr}.main-nav{gap:2px}.nav-muted{display:none}}@media(max-width:760px){.topbar{align-items:flex-start;gap:12px;flex-direction:column;padding:14px 18px}.main-nav{flex-wrap:wrap}.container{margin-top:28px}.page-heading{align-items:flex-start;flex-direction:column}.heading-actions{width:100%;flex-wrap:wrap}.quick-convert{padding:20px}.dropzone{min-height:150px}th,td{min-width:130px}.actions-cell{flex-direction:column;align-items:flex-start}}

/* Phase 4 usability refinements */
:root{--accent:#1748a6;--accent-hover:#123b89;--button-text:#fff}
html[data-theme="dark"]{--accent:#2d63b8;--accent-hover:#3b73cd;--button-text:#fff}
@media(prefers-color-scheme:dark){html[data-theme="system"]{--accent:#2d63b8;--accent-hover:#3b73cd;--button-text:#fff}}
.topbar{min-height:74px;padding:0 34px}.brand{font-size:17px}.main-nav{gap:9px}.main-nav>a,.nav-muted{padding:10px 13px;font-size:15px}.logout-button{padding:9px 13px;border-radius:10px}.container{max-width:1220px}.button-primary{background:var(--accent);color:#fff;text-shadow:0 1px 1px rgba(0,0,0,.2);box-shadow:0 5px 16px color-mix(in srgb,var(--accent) 28%,transparent)}.button-primary:hover{background:var(--accent-hover);color:#fff}.button-large{min-height:46px;padding:12px 19px}.button-ghost{background:transparent;color:var(--text);border-color:var(--border)}.button-ghost:hover{background:var(--panel-2);color:var(--text)}
.dashboard-uploader{max-width:820px;margin:0 auto 28px;padding:28px}.dropzone-large{min-height:240px}.field-label{display:grid;gap:7px;font-weight:700}.field-hint{font-size:12px;color:var(--muted);font-weight:400}.upload-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.files-upload-card{max-width:820px;margin-bottom:30px}.files-upload-card .dropzone{min-height:155px}.rename-card{padding:14px 18px;margin-bottom:18px}.rename-card summary{cursor:pointer;font-weight:750}.inline-form{display:flex;gap:10px;margin-top:13px}.inline-form input{flex:1}.item-stack{display:grid;gap:16px}.item-card{padding:20px}.item-card h2{margin:0 0 5px;font-size:18px}.item-card-head{display:flex;justify-content:space-between;gap:22px;align-items:flex-start}.item-card-status{display:grid;justify-items:end;gap:10px}.item-meta{display:flex;gap:24px;flex-wrap:wrap;margin-top:14px;padding-top:12px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}.attachments{margin-top:16px;padding-top:15px;border-top:1px solid var(--border)}.attachments h3{font-size:14px;margin:0 0 8px}.attachment-row{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:10px 0;border-top:1px solid color-mix(in srgb,var(--border) 70%,transparent)}.attachment-row:first-of-type{border-top:0}.attachment-actions{display:flex;align-items:center;gap:8px}.status-appended{color:var(--success)}.status-unsupported,.status-blocked{color:var(--warning)}.status-pending,.status-converting{color:var(--accent)}
@media(max-width:760px){.dashboard-uploader{padding:20px}.dropzone-large{min-height:185px}.inline-form,.item-card-head,.attachment-row{flex-direction:column;align-items:stretch}.item-card-status{justify-items:start}.attachment-actions{justify-content:flex-start}}

/* Phase 5 mass workflow and usability */
.universal-uploader{width:100%;margin:0 0 30px;padding:28px;box-shadow:var(--shadow)}
.universal-uploader .dropzone{min-height:235px;width:100%}.upload-fields{display:grid;grid-template-columns:2fr 1fr;gap:14px}.stats-first{margin-top:0}.batch-list{display:grid;gap:10px}.batch-row{display:grid;grid-template-columns:minmax(260px,1fr) auto auto auto;align-items:center;gap:18px;padding:15px 17px;background:var(--panel);border:1px solid var(--border);border-radius:13px;box-shadow:var(--shadow-soft);cursor:pointer;transition:transform .13s ease,box-shadow .13s ease,border-color .13s ease}.batch-row:hover{transform:translateY(-1px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 35%,var(--border))}.row-actions{display:flex;gap:8px}.folder-toolbar{margin:18px 0 30px}.folder-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.folder-chip{padding:6px 10px;border:1px solid var(--border);border-radius:999px;background:var(--panel-2);font-size:13px}.bulk-actions{display:flex;gap:10px;margin-bottom:10px}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.settings-grid>.card{height:max-content}.danger-card{margin-top:22px;border-color:color-mix(in srgb,var(--danger) 45%,var(--border))}.button-danger{background:var(--danger)!important;color:#fff!important}.check-row{display:flex!important;align-items:center;gap:9px!important;font-weight:600!important}.check-row input{width:auto}.user-admin-grid{display:grid;grid-template-columns:1.2fr 1.4fr 1.5fr auto auto auto;gap:12px;align-items:end}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:12px}.spinner{width:18px;height:18px;border:3px solid color-mix(in srgb,var(--accent) 25%,transparent);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}.spinner-stopped{animation:none;border-color:var(--success);background:var(--success);box-shadow:inset 0 0 0 4px var(--panel)}@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:900px){.batch-row{grid-template-columns:1fr auto}.batch-row>div:nth-child(3){display:none}.user-admin-grid{grid-template-columns:1fr 1fr}.settings-grid,.tool-grid,.upload-fields{grid-template-columns:1fr}}
@media(max-width:650px){.batch-row{grid-template-columns:1fr}.row-actions{justify-content:flex-start}.universal-uploader{padding:20px}.universal-uploader .dropzone{min-height:190px}}

/* Phase 6 administration and interaction polish */
.upload-error{border-color:var(--danger)!important}.bulk-actions{align-items:center;flex-wrap:wrap}.bulk-folder-select{width:auto;min-width:190px;height:42px}.js-select-row{cursor:pointer}.js-select-row:has(.js-row-checkbox:checked){background:var(--accent-soft)}.attachments-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}.attachments-heading h3{margin:0}.admin-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px}.admin-section{margin-bottom:24px}.admin-section h2{margin-top:0}.admin-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.admin-form-grid label,.user-admin-grid label{display:grid;gap:7px;align-content:end}.admin-form-grid input,.admin-form-grid select,.user-admin-grid input,.user-admin-grid select,.admin-save{min-height:42px}.subsection{padding-top:20px;margin-top:4px;border-top:1px solid var(--border)}.subsection h3{margin:0 0 14px}.user-admin-grid{grid-template-columns:1.1fr 1.25fr 1.5fr minmax(100px,.55fr) minmax(140px,.7fr) 110px;gap:16px;align-items:end}.admin-check{min-height:42px;align-self:end;justify-content:center}.admin-save{width:100%;align-self:end}.system-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.system-grid>div{display:grid;gap:5px;padding:14px;background:var(--panel-2);border-radius:10px}.maintenance-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.maintenance-actions form{margin:0}
@media(max-width:950px){.admin-metrics{grid-template-columns:repeat(2,1fr)}.user-admin-grid{grid-template-columns:1fr 1fr}.admin-form-grid,.system-grid{grid-template-columns:1fr 1fr}}@media(max-width:650px){.admin-metrics,.admin-form-grid,.system-grid,.user-admin-grid{grid-template-columns:1fr}}