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[data-notebook-kind^="formula"] .notebook-kind-symbol{font:italic 600 15px/1 Georgia,serif}
button.notebook-kind-button>svg.notebook-kind-icon,.notebook-kind-legend svg.notebook-kind-icon{display:block;flex:none;width:34px;height:34px;min-width:34px;min-height:34px;max-width:34px;max-height:34px;margin:0;padding:0;background:none;aspect-ratio:1;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;pointer-events:none}
.notebook-kind-icon text{fill:currentColor;stroke:none}.notebook-kind-icon .question-symbol{font:bold 19px Georgia,serif}.notebook-kind-icon .formula-symbol{font:italic bold 10px Georgia,serif}
.notebook-kind-legend{display:flex;flex-wrap:wrap;align-items:center;gap:8px 22px;margin:16px 0 30px var(--heading-indent,32px);padding:12px 0;border-block:1px solid #dce2d1;color:#657454;font:500 12px/1.5 var(--ad-font)}
.notebook-kind-legend>span{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}.notebook-kind-legend .notebook-kind-symbol{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;font-size:18px}.notebook-kind-legend [data-notebook-legend^="formula"]{color:#80652e}.notebook-kind-legend [data-notebook-legend="formula"] .notebook-kind-symbol{font:italic bold 14px Georgia,serif}
@media(max-width:600px){.notebook-kind-legend{display:grid;grid-template-columns:1fr 1fr;gap:5px 8px;margin-left:0}.notebook-kind-legend>span{font-size:11px}}
/* Observation prompts stay with the experiment, including in expanded view. */
.lab-observation{display:flex;align-items:baseline;gap:10px;margin:0;padding:12px 20px;border-bottom:1px solid #dce2d1;background:#f4f5eb;color:#4d6044;font:500 14px/1.75 var(--ad-font);word-break:keep-all;overflow-wrap:anywhere}
.lab-observation>strong{flex:none;font-size:12px;color:#60734d;white-space:nowrap}.lab-observation>span{min-width:0}
.notebook-mini-lab>.lab-observation{margin:0 0 12px;padding:9px 0;background:none;border-bottom:1px solid #dce2d1;font-size:13px}
.core-reading-path{margin:0 0 30px var(--heading-indent,32px);padding:15px 18px;background:#eef1e4;border-left:3px solid #95a77c;border-radius:0 8px 8px 0;color:#4e6144;font:500 14px/1.8 var(--ad-font)}
.core-reading-path>strong{font-size:15px}.core-reading-path p{margin:5px 0 10px}.core-reading-path nav{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}.core-reading-path a{color:#4e6144;text-underline-offset:4px;font-weight:600}
.thermal-lab:has(>.lab-observation) {scroll-margin-top:18px}
@media(max-width:600px){.lab-observation{display:block;padding:11px 13px;font-size:13px}.lab-observation>strong{display:block;margin-bottom:3px}.core-reading-path{margin-left:0;padding:13px;font-size:13px}.core-reading-path nav{gap:6px 9px}.core-reading-path nav>span{display:none}.core-reading-path a{flex-basis:100%}}

.chapter-takeaway{margin:24px 0 28px var(--heading-indent,32px);border-left:3px solid #a5b38d;background:#f0f3e7;padding:16px 20px;color:#506546;line-height:1.9}.chapter-takeaway p{margin:7px 0 0;font-size:15px}.chapter-takeaway>strong{font-size:16px}
.optional-principle{margin:20px 0 24px var(--heading-indent,32px);border-block:1px solid #d6deca}.optional-principle>summary{cursor:pointer;padding:14px 0;color:#60724f;font:600 14px/1.7 var(--ad-font)}.optional-principle>.note-prose,.optional-principle>.thermal-lab{margin-left:0}
.energy-balance-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0 24px var(--heading-indent,32px)}.energy-balance-summary>div{padding:16px;background:#f0f2e6;border-radius:6px}.energy-balance-summary dt{font-weight:600;color:#60704d;font-size:16px}.energy-balance-summary dd{margin:8px 0 0;font-size:14px;line-height:1.8;color:#6d785f}
@media(max-width:600px){.chapter-takeaway,.optional-principle,.energy-balance-summary{margin-left:0}.energy-balance-summary{grid-template-columns:1fr;gap:6px}.energy-balance-summary>div{padding:12px 15px}}