.separation-workspace {
  width: 100%;
  max-width: none;
  margin: 0 auto;
  padding: 22px 0 48px;
}

.separation-head {
  display: grid;
  grid-template-columns: minmax(220px, .42fr) minmax(560px, 1fr);
  align-items: end;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--app-line);
}

.separation-head h1 {
  margin: 5px 0 4px;
  color: var(--app-text);
  font-size: 26px;
  letter-spacing: 0;
}

.separation-head p {
  overflow: hidden;
  margin: 0;
  color: var(--app-muted);
  font-size: 12px;
  line-height: 1.5;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.production-tool-tabs {
  display: grid;
  grid-template-columns: repeat(5, minmax(92px, 1fr));
  gap: 6px;
}

.production-tool-tabs button {
  min-width: 0;
  min-height: 38px;
  padding: 0 10px;
  overflow: hidden;
  border: 1px solid var(--app-line);
  border-radius: 8px;
  background: var(--button-secondary-bg);
  color: var(--app-muted);
  font-size: 12px;
  font-weight: 750;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.production-tool-tabs button.active,
.production-tool-tabs button:hover {
  border-color: var(--button-accent-border);
  background: var(--state-selected);
  color: var(--app-accent-readable);
}

.separation-existing-banner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin: 14px 0 0;
  padding: 9px 12px;
  border: 1px solid color-mix(in srgb, var(--app-accent) 35%, var(--app-line));
  border-radius: 9px;
  background: color-mix(in srgb, var(--app-accent-soft) 48%, var(--app-panel));
}

.separation-existing-banner[hidden] { display: none !important; }
.separation-existing-banner strong { color: var(--app-text); font-size: 13px; }
.separation-existing-banner span { overflow: hidden; color: var(--app-muted); font-size: 12px; line-height: 1.5; text-overflow: ellipsis; white-space: normal; }

.separation-layout {
  display: grid;
  grid-template-areas:
    'source runtime'
    'process runtime';
  grid-template-columns: minmax(0, 1fr) minmax(300px, .36fr);
  align-items: start;
  gap: 14px;
  min-height: 0;
  margin-top: 14px;
}

.separation-pane {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--app-line);
  border-radius: 11px;
  background: var(--app-panel);
}

.separation-source {
  grid-area: source;
  display: grid;
  grid-template-areas:
    'head head'
    'field list'
    'status status';
  grid-template-columns: minmax(210px, .34fr) minmax(280px, 1fr);
  align-items: start;
  gap: 12px 16px;
}

.separation-process { grid-area: process; }
.separation-runtime { grid-area: runtime; }

.separation-pane-head {
  display: flex;
  min-height: 34px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.separation-source > .separation-pane-head { grid-area: head; margin-bottom: 0; }
.separation-pane-head > div { display: flex; min-width: 0; align-items: baseline; gap: 9px; }
.separation-pane-head h2 { margin: 0; color: var(--app-text); font-size: 16px; letter-spacing: 0; }
.separation-pane-head small { color: var(--app-muted); font-size: 12px; line-height: 1.45; }

.separation-source-actions {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 6px;
}

.separation-source-actions .outline-btn,
.separation-source-actions .separation-clear-assets {
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid var(--app-line);
  border-radius: 7px;
  background: var(--button-secondary-bg);
  color: var(--app-text);
  font-size: 12px;
  white-space: nowrap;
}

.separation-source-actions .separation-clear-assets {
  border-color: var(--state-danger-line);
  background: var(--state-danger-bg);
  color: var(--state-danger-text);
}

.separation-source-actions button:hover { border-color: color-mix(in srgb, var(--app-accent) 42%, var(--app-line)); }
.separation-source-actions button:disabled { cursor: wait; opacity: .64; }

.separation-field {
  grid-area: field;
  display: grid;
  gap: 7px;
  margin: 0;
  color: var(--app-muted);
  font-size: 12px;
}

.separation-field select {
  width: 100%;
  height: 40px;
  padding: 0 10px;
  border: 1px solid var(--app-line);
  border-radius: 7px;
  background: var(--control-bg);
  color: var(--app-text);
  font-size: 12px;
}

.separation-source-list { grid-area: list; display: grid; gap: 7px; }
.separation-source-status { grid-area: status; min-height: 18px; margin: 0; color: var(--app-muted); font-size: 12px; line-height: 1.5; }
.separation-source-status:empty { display: none; }
.separation-source-status.error { color: var(--state-danger-text); }

.separation-source-row {
  display: grid;
  width: 100%;
  min-height: 58px;
  grid-template-columns: 32px minmax(0, 1fr) 8px;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--app-line);
  border-radius: 8px;
  background: var(--app-panel-2);
  color: var(--app-text);
  text-align: left;
}

.separation-source-row:hover { border-color: color-mix(in srgb, var(--app-accent) 42%, var(--app-line)); background: var(--state-hover); }
.separation-source-row.active { border-color: var(--button-accent-border); background: var(--state-selected); }
.separation-source-icon { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 50%; background: var(--app-panel); color: var(--app-muted); }
.separation-source-row.active .separation-source-icon { background: var(--app-accent); color: var(--app-accent-ink); }
.separation-source-row strong,
.separation-source-row small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.separation-source-row strong { font-size: 13px; }
.separation-source-row small { margin-top: 3px; color: var(--app-muted); font-size: 12px; }
.separation-source-row i { width: 7px; height: 7px; border: 1px solid var(--app-faint); border-radius: 50%; }
.separation-source-row.active i { border: 2px solid var(--app-accent-soft); background: var(--app-accent); }

.separation-source-more { margin-top: 3px; border-top: 1px solid var(--app-line); }
.separation-source-more > summary { display: flex; align-items: center; justify-content: space-between; padding: 10px 2px 6px; color: var(--app-muted); cursor: pointer; font-size: 12px; list-style: none; }
.separation-source-more > summary::-webkit-details-marker { display: none; }
.separation-source-more > summary::after { margin-left: auto; padding-left: 8px; color: var(--app-faint); content: '⌄'; }
.separation-source-more[open] > summary::after { transform: rotate(180deg); }
.separation-source-more > summary span { margin-left: 6px; color: var(--app-accent-readable); font-size: 12px; }
.separation-source-more > div { display: grid; gap: 6px; }

.separation-presets { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.separation-presets button { position: relative; min-width: 0; min-height: 88px; padding: 13px 48px 13px 12px; overflow: hidden; border: 1px solid var(--app-line); border-radius: 9px; background: var(--app-panel-2); color: var(--app-text); text-align: left; }
.separation-presets button:hover { border-color: color-mix(in srgb, var(--app-accent) 42%, var(--app-line)); background: var(--state-hover); }
.separation-presets button.active { border-color: var(--button-accent-border); background: var(--state-selected); box-shadow: inset 3px 0 0 var(--app-accent); }
.separation-presets strong,
.separation-presets span { display: block; }
.separation-presets strong { font-size: 15px; }
.separation-presets span { margin-top: 6px; color: var(--app-muted); font-size: 12px; line-height: 1.45; }
.separation-presets em { position: absolute; top: 12px; right: 12px; color: var(--app-faint); font-size: 28px; font-style: normal; font-weight: 750; }
.separation-presets button.active em { color: color-mix(in srgb, var(--app-accent) 54%, var(--app-accent-soft)); }
.separation-presets button[data-separation-preset='quality']::after { position: absolute; right: 9px; bottom: 8px; padding: 3px 6px; border-radius: 999px; background: var(--app-accent-soft); color: var(--app-accent-readable); content: '推荐'; font-size: 12px; font-weight: 700; }

.separation-job { margin-top: 14px; padding: 14px 0; border-top: 1px solid var(--app-line); border-bottom: 1px solid var(--app-line); }
.separation-job-state { display: grid; grid-template-columns: 9px minmax(0, 1fr) auto; align-items: center; gap: 9px; }
.separation-job-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--app-faint); }
.separation-job.running .separation-job-dot { background: var(--app-accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--app-accent) 8%, transparent); }
.separation-job.failed .separation-job-dot { background: var(--app-coral); }
.separation-job.complete .separation-job-dot { background: var(--app-secondary); }
.separation-job-state strong,
.separation-job-state small { display: block; }
.separation-job-state strong { font-size: 13px; }
.separation-job-state small { min-height: 18px; margin-top: 3px; color: var(--app-muted); font-size: 12px; line-height: 1.5; }
.separation-job-state b { color: var(--app-text); font-size: 12px; }
.separation-job-progress { height: 5px; margin-top: 11px; overflow: hidden; border-radius: 3px; background: var(--app-panel-2); }
.separation-job-progress span { display: block; width: 0; height: 100%; background: var(--app-accent); transition: width .2s ease; }
.separation-job.failed .separation-job-progress span { background: var(--app-coral); }
.separation-job-meta { display: flex; justify-content: space-between; margin-top: 7px; color: var(--app-faint); font-size: 12px; }
.separation-format-field { display: grid; grid-template-columns: minmax(150px, auto) minmax(190px, 1fr); align-items: center; gap: 10px; margin-top: 12px; color: var(--app-muted); font-size: 12px; }
.separation-format-field select { width: 100%; height: 36px; padding: 0 10px; border: 1px solid var(--app-line); border-radius: 7px; background: var(--control-bg); color: var(--app-text); font-size: 12px; }
.separation-format-field select:focus { border-color: var(--button-accent-border); outline: 2px solid color-mix(in srgb, var(--app-accent) 24%, transparent); outline-offset: 1px; }
.separation-format-field select:disabled { cursor: wait; opacity: .64; }
.separation-actions { display: flex; gap: 8px; margin-top: 12px; }
.separation-actions .primary-btn { flex: 1; }
.separation-actions button[hidden] { display: none; }

.separation-manual-tools { overflow: hidden; margin-top: 16px; border: 1px solid var(--app-line); border-radius: 10px; background: var(--app-panel-2); }
.separation-manual-head { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 10px; min-height: 60px; padding: 9px 11px; cursor: pointer; list-style: none; }
.separation-manual-head::-webkit-details-marker { display: none; }
.separation-manual-head:hover { background: var(--state-hover); }
.separation-manual-tools[open] > .separation-manual-head { border-bottom: 1px solid var(--app-line); }
.separation-manual-head > span { padding: 4px 8px; border: 1px solid var(--button-accent-border); border-radius: 999px; background: var(--app-accent-soft); color: var(--app-accent-readable); font-size: 12px; font-weight: 750; white-space: nowrap; }
.separation-manual-head h3 { margin: 0; color: var(--app-text); font-size: 14px; }
.separation-manual-head p { margin: 3px 0 0; color: var(--app-muted); font-size: 12px; line-height: 1.45; }
.separation-manual-head i { color: var(--app-accent-readable); font-size: 12px; font-style: normal; font-weight: 750; white-space: nowrap; }
.separation-manual-list { display: grid; gap: 7px; padding: 9px; }

.separation-manual-card { display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; align-items: center; gap: 11px; min-height: 82px; padding: 11px; border: 1px solid var(--app-line); border-radius: 8px; background: var(--app-panel); }
.separation-manual-card:hover { border-color: color-mix(in srgb, var(--app-accent) 38%, var(--app-line)); background: var(--state-hover); }
.separation-manual-card.ready { min-height: 58px; border-color: color-mix(in srgb, var(--status-success-text) 32%, var(--app-line)); background: color-mix(in srgb, var(--status-success-bg) 42%, var(--app-panel)); }
.separation-manual-card.is-current { border-color: color-mix(in srgb, var(--app-accent) 62%, var(--app-line)); background: color-mix(in srgb, var(--app-accent-soft) 58%, var(--app-panel)); box-shadow: inset 3px 0 0 var(--app-accent); }
.separation-manual-index { position: relative; display: grid; width: 28px; height: 28px; place-items: center; border: 1px solid var(--app-line); border-radius: 6px; color: var(--app-accent-readable); font-size: 12px; font-weight: 750; }
.separation-manual-card.ready .separation-manual-index { border-color: color-mix(in srgb, var(--status-success-text) 46%, var(--app-line)); color: var(--status-success-text); }
.separation-manual-card:not(.ready) .separation-manual-index { border-color: color-mix(in srgb, var(--state-danger-text) 48%, var(--app-line)); color: var(--state-danger-text); }
.separation-manual-card:not(.ready) .separation-manual-index::after { content: '!'; position: absolute; top: -8px; right: -8px; display: grid; width: 16px; height: 16px; place-items: center; border: 1px solid var(--state-danger-line); border-radius: 50%; background: var(--state-danger-bg); color: var(--state-danger-text); font-size: 12px; font-weight: 800; line-height: 1; }
.separation-manual-card strong,
.separation-manual-card p,
.separation-manual-card small { display: block; }
.separation-manual-card strong { color: var(--app-text); font-size: 13px; }
.separation-manual-card p { margin: 4px 0; color: var(--app-muted); font-size: 12px; line-height: 1.45; }
.separation-manual-card small { color: var(--app-muted); font-size: 12px; line-height: 1.4; }
.separation-manual-card:not(.ready) small { color: var(--state-danger-text); }
.separation-manual-card.ready p { display: none; }
.separation-manual-card.ready small { color: var(--status-success-text); }
.separation-manual-card button { min-height: 34px; padding: 0 10px; border: 1px solid var(--button-accent-border); border-radius: 7px; background: var(--button-accent-bg); color: var(--button-accent-text); font-size: 12px; font-weight: 700; white-space: nowrap; }
.separation-manual-card button:hover { background: var(--button-secondary-bg-hover); }
.separation-manual-card button.secondary { border-color: var(--app-line); background: var(--button-secondary-bg); color: var(--app-text); }
.separation-manual-card button:disabled { cursor: not-allowed; opacity: .46; }
.separation-manual-actions { display: grid; gap: 6px; }

.preparation-all-ready .separation-manual-tools { border-color: var(--status-success-border); background: color-mix(in srgb, var(--status-success-bg) 56%, var(--app-panel)); }
.preparation-all-ready .separation-manual-head > span { border-color: var(--status-success-border); background: var(--status-success-bg); color: var(--status-success-text); }

.separation-runtime-chip { padding: 4px 7px; border: 1px solid var(--app-line); border-radius: 6px; color: var(--app-muted); font-size: 12px; }
.separation-runtime-chip.idle { border-color: color-mix(in srgb, var(--status-info-text) 38%, var(--app-line)); background: var(--status-info-bg); color: var(--status-info-text); }
.separation-runtime-chip.ready { border-color: var(--button-accent-border); background: var(--status-success-bg); color: var(--status-success-text); }
.separation-runtime-chip.error { border-color: var(--state-danger-line); background: var(--state-danger-bg); color: var(--state-danger-text); }

.separation-output-head { display: flex; justify-content: space-between; margin: 14px 0 8px; color: var(--app-text); font-size: 12px; }
.separation-output-head span { color: var(--app-accent-readable); font-size: 12px; }
.separation-output-list { display: grid; gap: 6px; }
.separation-output-file { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: stretch; gap: 6px; padding: 5px; border: 1px solid var(--app-line); border-radius: 7px; background: var(--app-panel-2); }
.separation-output-file.is-playing { border-color: color-mix(in srgb, var(--app-accent) 68%, var(--app-line)); background: var(--state-selected); }
.separation-output-file.is-busy { opacity: .72; }
.separation-output-reveal { display: grid; width: 100%; min-width: 0; min-height: 42px; grid-template-columns: 25px minmax(0, 1fr) auto; align-items: center; gap: 8px; padding: 5px 4px; border: 0; border-radius: 5px; background: transparent; color: var(--app-text); text-align: left; }
.separation-output-reveal:hover { background: var(--state-hover); }
.separation-output-reveal > span:first-child { color: var(--app-accent-readable); }
.separation-output-list strong,
.separation-output-list small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.separation-output-list strong { font-size: 13px; }
.separation-output-list small { margin-top: 2px; color: var(--app-muted); font-size: 12px; }
.separation-output-list em { color: var(--app-muted); font-size: 12px; font-style: normal; }
.separation-output-actions { display: flex; align-items: center; gap: 4px; }
.separation-output-actions button { min-width: 52px; min-height: 34px; padding: 0 8px; border: 1px solid var(--app-line); border-radius: 6px; background: var(--control-bg); color: var(--app-text); font-size: 12px; font-weight: 700; }
.separation-output-actions button:hover:not(:disabled) { border-color: color-mix(in srgb, var(--app-accent) 54%, var(--app-line)); background: var(--state-hover); }
.separation-output-actions button:disabled { cursor: wait; opacity: .58; }
.separation-output-preview { display: inline-flex; align-items: center; justify-content: center; gap: 5px; }
.separation-output-preview.is-playing { border-color: color-mix(in srgb, var(--app-accent) 68%, var(--app-line)); background: var(--app-accent); color: var(--app-accent-ink); }
.separation-output-actions .separation-output-remove { color: var(--status-danger-text); }
.separation-empty { padding: 28px 12px; border: 1px dashed var(--app-line); border-radius: 7px; color: var(--app-muted); text-align: center; font-size: 12px; }
.separation-empty.compact { padding: 20px 8px; }
.separation-empty strong,
.separation-empty small { display: block; }
.separation-empty strong { color: var(--app-text); font-size: 13px; }
.separation-empty small { min-width: 0; max-width: 100%; margin-top: 6px; overflow-wrap: anywhere; color: var(--app-muted); font-size: 12px; line-height: 1.5; white-space: normal; word-break: break-word; }

.separation-output-group { overflow: hidden; border: 1px solid var(--app-line); border-radius: 7px; background: var(--app-panel-2); }
.separation-output-group > summary { display: grid; min-height: 52px; grid-template-columns: 25px minmax(0, 1fr) auto; align-items: center; gap: 8px; padding: 7px 9px; color: var(--app-text); cursor: pointer; list-style: none; }
.separation-output-group > summary::-webkit-details-marker { display: none; }
.separation-output-group > summary:hover { background: var(--state-hover); }
.separation-output-group > summary > span:first-child { color: var(--app-accent-readable); }
.separation-output-group > div { display: grid; gap: 4px; padding: 6px; border-top: 1px solid var(--app-line); background: var(--app-panel); }
.separation-output-group .separation-output-file { min-height: 44px; background: var(--app-panel-2); }

.separation-technical-details { margin-top: 14px; border-top: 1px solid var(--app-line); }
.separation-technical-details > summary { padding: 12px 2px; color: var(--app-muted); cursor: pointer; font-size: 12px; list-style: none; }
.separation-technical-details > summary:hover { color: var(--app-text); }
.separation-technical-details > summary::-webkit-details-marker { display: none; }
.separation-technical-details > summary::after { float: right; content: '⌄'; }
.separation-technical-details[open] > summary::after { transform: rotate(180deg); }
.separation-runtime-grid { display: grid; grid-template-columns: 1fr 1fr; margin: 0; border-top: 1px solid var(--app-line); border-left: 1px solid var(--app-line); }
.separation-runtime-grid > div { min-width: 0; padding: 9px; border-right: 1px solid var(--app-line); border-bottom: 1px solid var(--app-line); }
.separation-runtime-grid dt { color: var(--app-muted); font-size: 12px; }
.separation-runtime-grid dd { margin: 4px 0 0; overflow: hidden; color: var(--app-text); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }

.separation-workspace.separation-has-results .separation-presets { display: none; }
.separation-workspace.separation-has-results .separation-job { margin-top: 0; }
body.separation-view-open :is(.project-header, .workflow-strip, .content-grid) { display: none !important; }

@media (max-width: 1320px) {
  .separation-head { grid-template-columns: minmax(200px, .35fr) minmax(0, 1fr); }
  .separation-layout { grid-template-columns: minmax(0, 1fr) minmax(280px, .38fr); }
  .separation-source { grid-template-columns: minmax(190px, .36fr) minmax(240px, 1fr); }
}

@media (max-width: 1080px) {
  .separation-head { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .production-tool-tabs { grid-template-columns: repeat(5, minmax(80px, 1fr)); }
  .separation-layout { grid-template-areas: 'source' 'process' 'runtime'; grid-template-columns: minmax(0, 1fr); }
  .separation-output-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .separation-runtime-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .separation-workspace { padding: 16px 0 34px; }
  .separation-head h1 { font-size: 23px; }
  .production-tool-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .separation-existing-banner { grid-template-columns: minmax(0, 1fr); }
  .separation-existing-banner span { white-space: normal; }
  .separation-source { grid-template-areas: 'head' 'field' 'list' 'status'; grid-template-columns: minmax(0, 1fr); }
  .separation-source > .separation-pane-head { align-items: stretch; flex-direction: column; }
  .separation-source-actions { justify-content: flex-start; }
  .separation-presets { grid-template-columns: minmax(0, 1fr); }
  .separation-manual-head { grid-template-columns: minmax(0, 1fr) auto; }
  .separation-manual-head > span { grid-column: 1 / -1; justify-self: start; }
  .separation-manual-card { grid-template-columns: 28px minmax(0, 1fr); }
  .separation-manual-card > button,
  .separation-manual-actions { grid-column: 2; width: 100%; }
  .separation-manual-actions { grid-template-columns: 1fr 1fr; }
  .separation-output-list { grid-template-columns: minmax(0, 1fr); }
  .separation-runtime-grid { grid-template-columns: 1fr 1fr; }
}