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/* Introductory reading page and conventional vertical profile charts. */
[hidden]{display:none!important}
#experiment-title{font-size:30px;font-weight:600;letter-spacing:-1px;line-height:1.2;margin:0 0 11px}
.guide-back{display:inline-block;font-size:11px;margin-bottom:16px;text-decoration:none;color:var(--muted)}
.guide-back:hover{text-decoration:underline;color:var(--teal)}
.home{max-width:1200px;margin:auto}
.home-hero{background:#173c42;color:#f3f7f0;border-radius:14px;padding:43px 40px;position:relative;overflow:hidden}
.home-hero:after{content:"";width:230px;height:230px;border:1px solid #79b3a436;border-radius:50%;position:absolute;right:-65px;top:-60px;box-shadow:0 0 0 33px #79b3a40a,0 0 0 66px #79b3a406;pointer-events:none}
.home-hero .eyebrow{color:#aad4c3;position:relative;z-index:1}
.home-hero h1{font-size:clamp(32px,3.6vw,51px);font-weight:550;letter-spacing:-1.8px;line-height:1.12;margin:20px 0;position:relative;z-index:1}
.home-lead{font-size:15px;line-height:1.8;max-width:660px;color:#cbdfd7;margin:0}
.home-actions{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0}
.home-actions .button{font-size:12px;padding:12px 17px;border-color:#a2c7b66b;background:transparent;color:#e6f1e9;text-decoration:none}
.home-actions .primary{background:#bde1cd;color:#153c3d;border-color:#bde1cd}
.home-actions .button:hover{background:#d1e8dc;color:#153c3d}
.home-facts{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:10px;color:#98bfb0}
.home-facts span:before{content:"•";margin-right:7px;color:#d3a474}
.home h2{font-size:26px;line-height:1.3;margin:11px 0 20px;letter-spacing:-.7px}
.home p{line-height:1.85}
.home-basics{display:grid;grid-template-columns:1fr 2fr;gap:35px;padding:37px 0 20px;border-bottom:1px solid var(--border)}
.home-basics .small-label,.home-boundaries .small-label,.section-heading .small-label{color:#698477}
.home-prose p{font-size:14px;color:#4d686b;margin:0 0 17px}
.home-prose strong{font-weight:600;color:var(--ink)}
.home-glossary{padding:20px 0}
.glossary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:0}
.glossary-grid>div{padding:21px 23px;background:#edf3ed;border:1px solid var(--border);border-radius:8px}
.glossary-grid dt{font-size:14px;font-weight:600;color:#234e53;margin-bottom:9px}
.glossary-grid dd{margin:0;font-size:12px;line-height:1.85;color:#587274}
.home .home-note{font-size:11px;line-height:1.8;color:#748982;margin:17px 0 0}
.section-heading{display:grid;grid-template-columns:1.5fr 1fr;gap:28px;align-items:end;margin:27px 0 20px}
.section-heading h2{margin-bottom:0}
.section-heading>p{font-size:12px;color:var(--muted);margin:0}
.guide-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:22px 0 25px}
.guide-index a{display:flex;align-items:center;gap:12px;padding:14px 15px;background:#fff;border:1px solid var(--border);border-radius:7px;font-size:12px;text-decoration:none;color:#46686a}
.guide-index b{font-size:12px;color:#91a59a;font-variant-numeric:tabular-nums}
.guide-index a:hover{border-color:var(--teal);color:var(--teal)}
.guide-card{background:#fff;border:1px solid var(--border);border-radius:11px;margin:20px 0;padding:28px;scroll-margin-top:20px}
.guide-card>header{display:flex;gap:17px;align-items:center;margin-bottom:20px;padding-bottom:19px;border-bottom:1px solid var(--border)}
.guide-number{display:grid;place-items:center;background:var(--guide-accent);color:#fff;border-radius:8px;width:45px;height:45px;flex-shrink:0;font-size:18px;font-weight:600}
.guide-card .guide-kicker{font-size:9px;letter-spacing:1.6px;color:var(--guide-accent);font-weight:700;margin:0 0 6px}
.guide-card h3{font-size:22px;font-weight:550;letter-spacing:-.45px;line-height:1.3;margin:0}
.guide-content{display:grid;grid-template-columns:minmax(0,2.6fr) minmax(190px,1fr);gap:28px;align-items:start}
.guide-content p{font-size:13px;color:#4c696c;margin:0 0 17px}
.guide-content p strong{color:var(--ink);font-weight:600}
.guide-content .guide-caution{font-size:12px;background:#f5f7f2;border-left:3px solid var(--guide-accent);padding:13px 16px;color:#5e7269;margin-bottom:0}
.try-box{background:#edf4ed;border-radius:7px;padding:20px 17px}
.try-box h4{font-size:12px;font-weight:650;margin:0 0 13px;color:#385e57}
.try-box ol{padding-left:17px;font-size:12px;line-height:1.8;color:#58726a;margin:0 0 19px}
.try-box li{margin-bottom:10px;padding-left:3px}
.try-box .button{text-decoration:none;display:inline-block;font-size:10px;background:#fff}
.home-reading,.home-boundaries{padding:26px 0;border-top:1px solid var(--border);margin-top:30px}
.reading-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.reading-grid h3{font-size:13px;margin:0 0 10px;font-weight:600}
.reading-grid p{font-size:12px;color:#5c7576;margin:0}
.home-boundaries>p{font-size:13px;color:#587275;max-width:900px}
.home-docs{display:flex;flex-wrap:wrap;gap:11px 24px;margin-top:22px;font-size:12px}
@media(max-width:1100px){.guide-content{grid-template-columns:1fr}.try-box{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:0 20px;align-items:center}.try-box h4{grid-column:1/-1}.try-box ol{margin:0}.home-hero{padding:35px}.home-basics{grid-template-columns:1fr 2fr;gap:24px}.section-heading{display:block}.section-heading>p{margin-top:12px}}
@media(max-width:680px){#experiment-title{font-size:26px}.home-hero{padding:28px 23px}.home-hero h1{font-size:33px;letter-spacing:-1px}.home-lead{font-size:13px}.home-actions{display:grid}.home-actions .button{text-align:center}.home-facts{line-height:1.5;font-size:10px;gap:5px 17px}.home-basics{display:block;padding-top:28px}.home h2{font-size:23px}.home-prose p{font-size:13px}.glossary-grid{grid-template-columns:1fr}.guide-index{grid-template-columns:repeat(2,minmax(0,1fr))}.guide-index a{font-size:10px;padding:12px 10px;gap:8px}.guide-card{padding:20px 17px}.guide-card h3{font-size:20px}.guide-card>header{gap:12px}.guide-kicker{line-height:1.6}.guide-content{gap:18px}.try-box{display:block}.try-box ol{margin-bottom:16px}.reading-grid{grid-template-columns:1fr;gap:22px}.home-docs{display:grid;font-size:12px}.home-reading,.home-boundaries{padding-top:23px}.home .main-footer{font-size:10px}}
@media print{.home-actions,.guide-index,.try-box .button,.guide-back{display:none}.home-hero{background:white;color:#17363e;border:1px solid #dce5df}.home-lead,.home-hero .eyebrow,.home-facts{color:#496961}.guide-card{break-inside:avoid}.home-hero:after{display:none}}

@media(min-width:901px){.sidebar nav{position:sticky;top:20px}}

.version-badge{padding:5px 9px;border:1px solid #7caaa0;border-radius:5px;font-size:11px;white-space:nowrap}

/* Focused experiments; the established palette and chart layer are retained. */
.compact-hero{padding:32px 36px}
.compact-hero h1{font-size:42px;margin:16px 0;line-height:1.15}
.compact-hero .scope-intro{font-size:14px;line-height:1.8;color:#d2e3df;max-width:850px;margin:19px 0}
.lab-method{display:flex;align-items:center;justify-content:center;gap:17px;padding:23px 0;font-size:13px;color:var(--muted)}
.lab-method i{font-style:normal;color:#9cab9f}
.experiment-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
.experiment-entry{display:flex;gap:17px;background:white;border:1px solid var(--border);border-radius:10px;padding:23px;scroll-margin-top:20px}
.entry-number{font-size:14px;font-weight:650;color:var(--teal);padding-top:4px}
.experiment-entry h2{font-size:20px;letter-spacing:-.4px;margin:0 0 10px}
.experiment-entry p{font-size:13px;line-height:1.6;color:var(--muted);margin:8px 0}
.experiment-entry .entry-question{color:var(--ink);font-weight:550}
.experiment-entry .button{display:inline-block;text-decoration:none;margin-top:9px}
.home-help,.physics-explanation,.optional-plot{border:1px solid var(--border);background:white;border-radius:8px;min-width:0}
.home-help{margin-top:23px}
.home-physics h2{padding:17px 20px 0;margin:0;font-size:20px;line-height:1.4;letter-spacing:-.3px}
.home-help p{margin:13px 0}
.home-physics{margin-bottom:23px}
.home-help summary,.physics-explanation summary,.optional-plot>summary{padding:17px 20px;font-size:13px;font-weight:550;cursor:pointer;line-height:1.5}
.home-help>div,.physics-explanation>div,.four-states{padding:0 21px 14px;font-size:14px;line-height:1.8}
.physics-explanation .context-note{font-size:13px;color:var(--muted);border-left:2px solid var(--border);padding-left:14px}
.learning{display:block;background:none;border:0;padding:0;margin:20px 0 13px}
.learning p{font-size:14px;line-height:1.8;margin:13px 0;color:#46635e}
.experiment-task{display:flex;justify-content:space-between;align-items:center;gap:18px;background:#edf3ee;border-left:3px solid var(--accent);padding:13px 17px;margin:15px 0}
.experiment-task .small-label{font-size:10px;letter-spacing:1.2px;color:var(--accent)}
.experiment-task p{font-size:13px;line-height:1.7;margin:5px 0 0;max-width:640px}
#task-actions{display:flex;flex-wrap:wrap;gap:7px;flex-shrink:0;max-width:45%}
.view-switch{display:flex;flex-wrap:wrap;gap:7px}
.view-switch .selected{background:var(--soft);border-color:var(--accent);color:var(--accent)}
.charts{grid-template-columns:minmax(0,1fr)}
.charts>*{min-width:0}
.optional-plot .chart-card{border:0;border-top:1px solid var(--border);border-radius:0 0 8px 8px}
.contribution-select{flex-wrap:wrap;font-size:12px;gap:9px}
.contribution-select label{font-weight:550}
.selected-parts{padding:0 4px;margin:0;font-size:12px;line-height:1.7;color:var(--muted)}
.equilibrium-steps{background:#edf3ee;border:1px solid var(--border);border-radius:9px;padding:17px}
.equilibrium-steps ol{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:0;margin:0;gap:17px}
.equilibrium-steps li{min-width:0}
.equilibrium-steps span{display:block;font-size:9px;font-weight:650;line-height:1.5;letter-spacing:.5px;color:var(--muted)}
.equilibrium-steps b{display:block;margin-top:8px;font-size:21px;letter-spacing:-.5px}
.equilibrium-steps p{font-size:12px;line-height:1.6;margin:8px 0 0;color:var(--muted)}
.four-states table{width:100%;border-collapse:collapse;font-size:13px}
.four-states th,.four-states td{text-align:left;padding:9px 7px;border-bottom:1px solid var(--border)}
.four-states th:last-child,.four-states td:last-child{text-align:right}
.lead{font-size:14px}.control-head label,.panel-title h3{font-size:12px}.control-note{font-size:12px}
.model-strip{font-size:12px}.chart-header h3{font-size:14px}.chart-header p,.chart-caption{font-size:12px;line-height:1.7}
.legend{font-size:11px}.result-notice{font-size:13px;line-height:1.75}.action-row{font-size:11px}
.button{font-size:12px}.advanced summary{font-size:13px}.advanced>div{font-size:13px}.main-footer{font-size:11px;line-height:1.6}
@media(max-width:1100px){.experiment-task{display:block}#task-actions{max-width:none;margin-top:11px}.experiment-entry{padding:19px}}
@media(max-width:680px){.experiment-index{grid-template-columns:1fr}.compact-hero{padding:26px 22px}.compact-hero h1{font-size:33px}.compact-hero .scope-intro{font-size:13px}.lab-method{gap:8px;font-size:11px;flex-wrap:wrap}.experiment-entry{padding:20px 18px}.experiment-task{padding:13px 14px}.equilibrium-steps ol{grid-template-columns:1fr;gap:15px}.equilibrium-steps li+li{border-top:1px solid var(--border);padding-top:14px}.home-help summary,.physics-explanation summary,.optional-plot>summary{padding:15px}.home-help>div,.physics-explanation>div,.four-states{padding:0 15px 12px}.chart-actions{flex-shrink:0}.contribution-select input{width:100px;max-width:100px}}

/* Absolute temperatures and temperature changes use distinct Celsius conversions. */
.converted-value{display:block;margin-top:5px;font-size:12px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums}
.range-ends{gap:8px;line-height:1.5}
.metric-celsius{font-size:13px;font-weight:600;color:var(--accent)}
.equilibrium-steps .step-celsius{display:block;font-size:13px;font-weight:600;margin-top:4px;color:var(--ink)}
.experiment-start{border:1px solid var(--border);border-radius:9px;background:white;margin:16px 0}
.experiment-start>summary{padding:16px 20px;font-size:15px;font-weight:600;cursor:pointer;line-height:1.5}
.experiment-start>div{padding:0 21px 16px;font-size:13px;line-height:1.8}
.experiment-start p{margin:12px 0}
.experiment-start .context-note{border-left:2px solid var(--border);padding-left:13px;color:var(--muted);font-size:12px}
.initial-state-table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.6}
.initial-state-table th,.initial-state-table td{padding:9px 10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
.initial-state-table th{width:30%;font-weight:600}
.ppm-note{margin:10px 0 0}
@media(max-width:680px){.experiment-start>summary{padding:15px;font-size:14px}.experiment-start>div{padding:0 15px 12px}.initial-state-table th,.initial-state-table td{padding:8px 5px}.initial-state-table th{width:35%}.control-head label{min-height:30px}.control-head .value-wrap{display:inline-block}}