.lab-workspace { padding-bottom: 36px; }
.lab-fields { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.lab-field { display: flex; flex-direction: column; gap: 8px; min-width: 0; color: var(--ink-soft); }
.lab-field > span:first-child { font-weight: 600; color: var(--ink); }
.lab-field input:not([type=checkbox]), .lab-field select, .lab-field textarea { width: 100%; padding: 11px 13px; min-height: 48px; }
.lab-field input[type=file] { padding: 16px; border: 1px dashed var(--line-dark); border-radius: var(--radius-sm); background: var(--paper); white-space: normal; }
.lab-field input[type=color] { padding: 5px; }
.lab-field textarea { min-height: 150px; resize: vertical; line-height: 1.65; font-family: var(--font-ui); }
.lab-field code, .lab-code { font: 15px/1.7 Consolas,ui-monospace,monospace; }
.lab-field small { color: var(--muted); font-size: 14px; }
.lab-wide, .lab-fields fieldset { grid-column: 1/-1; }
.lab-fields fieldset { border: 1px solid var(--line); border-radius: 12px; margin: 0; padding: 20px; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.lab-fields legend { padding: 0 8px; font-weight: 600; }
.lab-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; align-items: center; }
.lab-actions button { min-height: 46px; }
.lab-advanced { border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; }
.lab-advanced summary { font-weight: 600; }
.lab-advanced fieldset { border: 0; padding: 18px 0 0; }
.lab-result { margin-top: 24px; }
.lab-result pre { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 18px; font: 15px/1.75 Consolas,"Microsoft YaHei",monospace; overflow: auto; max-height: 520px; white-space: pre-wrap; overflow-wrap: anywhere; }
.lab-downloads { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.lab-result .table-wrap { margin-top: 16px; max-height: 540px; }
.lab-result table { min-width: 460px; }
.lab-result th, .lab-result td { white-space: normal; overflow-wrap: anywhere; }
.lab-result td { max-width: 420px; }
.lab-gallery { display: grid; grid-template-columns: repeat(auto-fit,minmax(min(100%,240px),1fr)); gap: 20px; }
.lab-gallery figure { margin: 0; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 14px; overflow: hidden; }
.lab-gallery canvas, .lab-gallery img { max-width: 100%; max-height: 340px; object-fit: contain; display: block; margin: auto; }
.lab-gallery figcaption { font-size: 14px; margin-top: 10px; overflow-wrap: anywhere; }
.lab-result canvas, .lab-result video { max-width: 100%; border-radius: 8px; }
.lab-result audio { width: min(100%,600px); }
.lab-notice { padding: 14px 18px; border-left: 3px solid var(--teal); background: var(--teal-pale); border-radius: 0 8px 8px 0; font-size: 15px; }
.lab-error { color: var(--danger); }
.lab-result .formula-card { border: 1px solid var(--line); border-radius: 12px; padding: 20px; margin: 14px 0; min-width: 0; }
.formula-card h3 { font-size: 16px; margin: 0 0 12px; }
.formula-scroll { overflow-x: auto; overflow-y: hidden; padding: 8px 2px; font-size: 20px; }
.formula-card .katex-display { text-align: left; margin: .3em 0; }
.formula-card p { font-size: 15px; color: var(--muted); }
.plot-shell { min-width: 0; background: white; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.math-plot { width: 100%; height: 580px; min-height: 360px; }
.math-mode .lab-layout { display: grid; grid-template-columns: 340px minmax(0,1fr); gap: 24px; align-items: start; }
.math-mode { width: min(1440px,calc(100% - 56px)); }
.math-mode .lab-input-card { padding: 24px; }
.math-mode .lab-fields { grid-template-columns: 1fr; gap: 16px; }
.math-mode .lab-result { margin-top: 0; padding: 20px; }
.math-mode .lab-fields fieldset { grid-template-columns: 1fr; }
.math-mode .lab-field textarea { min-height: 92px; }
.math-mode .limit-strip { margin-bottom: 24px; }
.math-mode .lab-actions { gap: 10px; }
@media(min-width:1001px) { .math-mode .lab-input-card { max-height: 850px; overflow-y: auto; } .math-mode .lab-result { position: sticky; top: 16px; } }
.plot-toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
.plot-toolbar button { padding: 8px 14px; min-height: 44px; border: 1px solid var(--line); border-radius: 8px; background: white; }
.plot-toolbar button[aria-pressed=true] { background: var(--teal); border-color: var(--teal); color: white; }
.plot-toolbar button:disabled { opacity: .55; cursor: wait; }
.domain-legend { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 15px; margin: 16px 0; }
.phase-ramp { height: 14px; width: 220px; border-radius: 7px; background: linear-gradient(90deg,cyan,blue,magenta,red,yellow,lime,cyan); }
.lab-preview-frame { width: 100%; min-height: 580px; border: 1px solid var(--line); border-radius: 12px; background: white; }
.directory-category-heading { grid-column: 1/-1; margin: 24px 0 0; display: flex; justify-content: space-between; align-items: center; font-size: 20px; }
.directory-category-heading small { font-size: 14px; color: var(--muted); font-weight: 400; }
@media(max-width:1000px) { .math-mode .lab-layout { grid-template-columns: 1fr; } .math-mode .lab-fields { grid-template-columns: repeat(2,minmax(0,1fr)); } .math-mode .lab-result { margin-top: 0; } }
@media(max-width:760px) { .lab-fields, .math-mode .lab-fields, .lab-fields fieldset { grid-template-columns: 1fr; } .math-mode { width: calc(100% - 32px); } .lab-input-card { padding: 20px; } .math-plot { height: 430px; } .lab-gallery { grid-template-columns: 1fr; } .lab-result { padding: 18px; } .formula-scroll { font-size: 18px; } .lab-field input[type=file] { font-size: 14px; } }

.plot-range-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; grid-column: 1/-1; }
.plot-range-grid label > span { font-size: 14px; }
.math-mode .lab-layout { scroll-margin-top: 20px; }

/* Task, input, settings and output have distinct places in every workbench. */
.workspace-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:24px}
.workspace-feedback{font-size:14px;min-height:44px;display:inline-flex;align-items:center;white-space:nowrap;color:var(--teal);margin-top:20px}
.lab-hint{margin:0 0 22px;color:var(--muted);font-size:15px}
.lab-input-card{margin-top:0}.lab-actions{padding-top:20px;border-top:1px solid var(--line)}
.lab-fields .workspace-section{min-width:0;grid-column:1/-1;border:0;border-radius:0;padding:0 0 24px;margin:0;border-bottom:1px solid var(--line)}
.workspace-section-title{font-size:16px;font-weight:600;margin:0 0 16px;line-height:1.6}
.workspace-section-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;min-width:0}
.workspace-section-fields>.lab-wide{grid-column:1/-1}
.workspace-task{padding:18px 20px;background:var(--paper);border-radius:12px;grid-column:1/-1}
.workspace-task .lab-field{max-width:560px}.workspace-task select{background:white}
.workspace-advanced{grid-column:1/-1;border:1px solid var(--line);border-radius:12px;padding:14px 18px}
.workspace-advanced>summary{font-size:15px;font-weight:600;min-height:24px}.workspace-advanced>.workspace-section-fields{margin-top:20px}
.lab-fields fieldset.workspace-section{display:block}.lab-fields fieldset.workspace-section>legend{padding:0}
.lab-field:has(input[type=checkbox]){flex-direction:row;align-items:center;justify-content:space-between;gap:12px;min-height:48px;padding:10px 12px;background:var(--paper);border-radius:8px;flex-wrap:wrap}
.lab-field:has(input[type=checkbox])>span:first-child{font-weight:400;font-size:15px;flex:1}.lab-field:has(input[type=checkbox]) small{flex-basis:100%}
.editor-workspace{width:min(1440px,calc(100% - 56px))}.editor-workspace .lab-input-card{background:transparent;border:0;padding:0;box-shadow:none}.editor-workspace .lab-hint{display:none}.editor-workspace .workspace-heading{margin-bottom:16px}
.editor-workspace .lab-fields{gap:16px}.editor-workspace .lab-actions{border:0;padding:0}.editor-workspace>.limit-strip{margin:12px 0 22px}
@media(max-width:760px){.workspace-heading{display:block}.workspace-feedback{margin-top:6px}.workspace-section-fields{grid-template-columns:1fr;gap:16px}.lab-fields .workspace-section{padding-bottom:20px}.workspace-task{padding:16px}.editor-workspace{width:calc(100% - 32px)}.lab-actions{gap:10px}.lab-actions .button-primary{flex:1;min-width:160px}.lab-hint{font-size:14px}.lab-fields input[type=file]{max-width:100%;overflow:hidden;text-overflow:ellipsis}.workspace-section-title{margin-bottom:14px}}