:root{font-family:Inter,system-ui,sans-serif;color:#183644;background:#eef3f5;font-synthesis:none;--accent:#007c90}*{box-sizing:border-box}body{margin:0}button,select,input{font:inherit}button,select{border:1px solid #b8ccd3;border-radius:8px;background:white;color:#183644;padding:10px 14px}button{cursor:pointer}button:hover{background:#e4f4f6}button[aria-pressed=true]{background:#006b7d;color:white;border-color:#006b7d}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #f7ad42;outline-offset:3px}header{display:flex;align-items:center;gap:25px;background:#102f3e;color:white;padding:18px 28px}header a{color:#a3dce4;text-decoration:none;font-size:13px}h1{font-size:25px;letter-spacing:1px;margin:0}h1 span{color:#68d3d9}header p{flex:1;color:#b8cdd5;font-size:14px}main{display:grid;grid-template-columns:300px minmax(0,1fr);max-width:1600px;margin:auto}aside{background:white;padding:28px 24px;border-right:1px solid #d3e0e5}label{display:flex;justify-content:space-between;gap:8px;font-size:13px;font-weight:650;margin:23px 0 10px}output{white-space:nowrap;color:var(--accent)}select{width:100%;font-weight:650}input[type=range]{width:100%;accent-color:var(--accent)}#description,.note{font-size:13px;line-height:1.6;color:#476471}.note{padding:12px;background:#eef8f9;border-radius:8px}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:700;color:var(--accent);margin:0 0 16px}.actions{display:flex;gap:8px;margin:22px 0 32px}.chain{font-size:13px;line-height:1.8;font-weight:600}.small{font-size:12px;color:#607985;line-height:1.6}.workspace{padding:22px;min-width:0}.viewbar{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap}.viewbar button:last-child{margin-left:auto}#scene{position:relative;height:410px;background:#dfeaf0;border:1px solid #cbdce3;border-radius:14px;overflow:hidden;touch-action:none}#scene>canvas{display:block;width:100%;height:100%}.sceneLabel{position:absolute;left:20px;top:18px;pointer-events:none;display:grid;gap:6px}.sceneLabel strong{font-size:18px}.sceneLabel span{font-size:12px;color:#526e7b}#loading{position:absolute;top:45%;width:100%;text-align:center;padding:20px;z-index:2;background:#e5eff4e8}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0}.metrics>div{background:white;border:1px solid #d6e3e7;border-radius:10px;padding:18px}.metrics span{display:block;font-size:12px;color:#5b7480}.metrics strong{display:block;font-size:25px;margin-top:8px;color:#007488}.explanation{display:grid;grid-template-columns:1fr 1fr;gap:28px;background:white;border-radius:12px;padding:22px}.explanation h2{font-size:15px;margin:0 0 10px}.explanation p{font-size:13px;line-height:1.65}.formula{background:#eff6f8;border-radius:8px;padding:12px;font-variant-numeric:tabular-nums}#wave{width:100%;height:150px;background:#f2f7f9;border-radius:8px}footer{padding:18px;text-align:center;font-size:11px;color:#657f8b}footer a{color:#007488}.guide{max-width:1100px;margin:16px auto;padding:18px 28px;background:#fff7e9;border:1px solid #ead7b1;border-radius:12px;line-height:1.7;font-size:14px}.guide h2{margin-top:0;font-size:18px}[hidden]{display:none!important}@media(max-width:950px){main{grid-template-columns:250px minmax(0,1fr)}.workspace{padding:14px}.explanation{grid-template-columns:1fr}.metrics strong{font-size:20px}header{gap:15px}header p{display:none}header button{margin-left:auto}}@media(max-width:650px){header{padding:15px;flex-wrap:wrap}h1{font-size:21px}main{grid-template-columns:1fr}aside{border-right:0;padding:20px}#scene{height:340px}.metrics{gap:6px}.metrics>div{padding:12px 8px}.metrics strong{font-size:17px}.metrics span{font-size:11px}.viewbar button{padding:9px;font-size:12px}.guide{margin:12px}.explanation{padding:18px}}

/* Compact global header and integrated 3D controls */
.app-header{padding:9px 22px;gap:15px;min-height:60px;flex-wrap:wrap}
.app-header .brand{display:inline-flex;align-items:center;gap:9px;flex-shrink:0;color:#fff;text-decoration:none}
.app-header .brand h1{font-size:22px;line-height:1;white-space:nowrap}
.app-header .brand-icon{width:32px;height:32px;flex-shrink:0}
.app-header>p{flex:1 1 auto;margin:0;white-space:nowrap;font-size:12px}
.app-header .viewbar{margin:0;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.app-header .viewbar button{padding:7px 10px;font-size:12px;white-space:nowrap}
.app-header .viewbar button:last-child{margin-left:0}
.app-header>#help{padding:7px 10px;font-size:12px;margin-left:0}
@media(max-width:1150px){.app-header>p{display:none}.app-header .viewbar{margin-left:auto}}
@media(max-width:650px){.app-header{padding:9px 12px;gap:8px}.app-header .brand h1{font-size:20px}.app-header .brand-icon{width:27px;height:27px}.app-header .viewbar{order:3;width:100%;justify-content:space-between;margin:0}.app-header .viewbar button{flex:1;padding:7px 5px;font-size:11px}.app-header>#help{margin-left:auto}}

/* Independent telemetry dashboard */
.telemetry{margin:18px 0;padding:20px;background:#fff;border:1px solid #d6e3e7;border-radius:12px}
.telemetry-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:15px}
.telemetry-heading h2{font-size:17px;margin:0 0 5px;color:#183b4a}
.telemetry-heading p{font-size:12px;color:#607985;margin:0}
.telemetry-heading button{border:1px solid #bfd3dc;border-radius:8px;background:#f2f7f9;padding:9px 12px;color:#22566b;cursor:pointer}
.telemetry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.telemetry-grid>div{min-width:0;border:1px solid #e0e9ed;border-radius:9px;padding:12px}
.telemetry-grid h3{font-size:13px;margin:0 0 10px;color:#244b5b}
.telemetry-grid small{font-size:11px;color:#607985}
.telemetry-grid canvas{display:block;width:100%;height:145px}
@media(max-width:1100px){.telemetry-grid{grid-template-columns:1fr}}
@media(max-width:650px){.telemetry{padding:12px}.telemetry-heading{align-items:flex-start;flex-direction:column}}

.analysis-switch{display:flex;gap:8px;margin-bottom:16px}
.analysis-switch button{flex:1;font-weight:700}
.characteristics{padding:22px;background:#fff;border:1px solid #d6e3e7;border-radius:12px;margin-bottom:18px}
.characteristics h2{font-size:20px;margin:0 0 6px;color:#183b4a}
.curve-controls{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:20px 0}
.curve-controls label{margin:8px 0}
.curve-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.curve-legend{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:12px;font-size:13px;color:#476471}
.curve-legend span{display:inline-flex;gap:7px;align-items:center}
.curve-legend i{display:inline-block;width:11px;height:11px;border-radius:50%}
#characteristicChart{width:100%;height:320px;display:block;border-radius:10px;background:#f2f7f9}
@media(max-width:650px){.characteristics{padding:12px}.curve-controls{grid-template-columns:1fr;gap:8px}.analysis-switch button{padding:9px 6px;font-size:12px}}

/* Prominent mode switch in the global header */
.app-header .header-analysis-switch{display:flex;gap:6px;align-items:center;flex-shrink:0}
.app-header .header-analysis-switch button{font-size:12px;font-weight:750;padding:9px 12px;border:2px solid #68d3d9;background:#e6f9fa;color:#103747;white-space:nowrap}
.app-header .header-analysis-switch button[aria-pressed=true]{background:#007c90;color:#fff;border-color:#68d3d9}
.app-header .header-analysis-switch button:hover{background:#b5edf1;color:#103747}
@media(max-width:1250px){.app-header .header-analysis-switch{order:2}.app-header .viewbar{order:3;width:100%;justify-content:flex-start;margin-left:0}}
@media(max-width:650px){.app-header .header-analysis-switch{order:2;width:100%}.app-header .header-analysis-switch button{flex:1;white-space:normal}.app-header .viewbar{order:3}}

/* Contextual learning sidebar in characteristic curves mode */
.curves-sidebar h2{font-size:20px;color:#183b4a;margin:0 0 12px;line-height:1.3}
.curves-sidebar h3{font-size:13px;color:#007c90;margin:24px 0 8px}
.curves-sidebar>p:not(.eyebrow){font-size:13px;line-height:1.65;color:#476471}
.curves-sidebar .curve-guide-formula{font-size:13px;line-height:1.6;background:#eff6f8;border:1px solid #d6e3e7;border-radius:8px;padding:13px;margin-top:16px;overflow-wrap:anywhere}
.curves-sidebar .note{color:#285366;background:#eaf6f7}

/* Readable interpretation panel below the characteristic chart */
.characteristics .curve-result{margin-top:18px;padding:18px 20px;background:#e9f4f8;border:2px solid #5a9caf;border-left:7px solid #007c90;border-radius:12px;box-shadow:0 3px 12px rgba(16,55,71,.09)}
.curve-result-heading{display:flex;align-items:center;gap:10px;color:#123e50;font-size:17px;font-weight:750}
.curve-result-icon{display:inline-flex;align-items:center;justify-content:center;width:27px;height:27px;border-radius:50%;background:#007c90;color:#fff;font-size:18px}
.characteristics .curve-result-text{font-size:16px;line-height:1.65;font-weight:550;color:#173c4e;margin:12px 0 0}
.characteristics .curve-result[data-status="outside"]{background:#fff4df;border-color:#d59b36;border-left-color:#bd751b}
.characteristics .curve-result[data-status="outside"] .curve-result-icon{background:#a7620e}
.characteristics .curve-result[data-status="outside"] .curve-result-heading{color:#75420c}
@media(max-width:650px){.characteristics .curve-result{padding:14px}.characteristics .curve-result-text{font-size:15px}}

/* Interactive fundamentals: standalone classroom experiments */
[hidden]{display:none!important}
.fundamentals .foundation-card{background:#fff;border:1px solid #d2e2e9;border-radius:12px;padding:22px;margin-top:20px}
.foundation-card h3{font-size:19px;color:#173c4e;margin:0 0 10px}
.foundation-card>p{color:#476471;line-height:1.6}
.foundation-pressure{display:grid;grid-template-columns:minmax(150px,240px) 1fr;gap:22px;align-items:center;background:#f2f7f9;padding:18px;border-radius:12px}
.foundation-tank{height:200px;position:relative;border:3px solid #426a7e;border-top:0;background:#eaf2f6;border-radius:0 0 8px 8px;overflow:hidden}
.foundation-water{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(180deg,#8ed8eb,#249ac0);transition:height .12s ease}
.foundation-depth{position:absolute;top:12px;left:12px;color:#123b4b;background:#ffffffd9;border-radius:8px;padding:8px 12px;line-height:1.5}
.foundation-readouts{display:grid;gap:12px}
.foundation-readouts>div,.foundation-summary{background:#fff;border:1px solid #d4e3e9;border-radius:9px;padding:14px}
.foundation-readouts span,.foundation-summary span{display:block;color:#526e7b;font-size:13px}
.foundation-readouts strong{display:block;color:#123b4b;font-size:23px;margin-top:5px}
.foundation-readouts p{font-size:18px;font-weight:700;color:#007c90}
.foundation-exercise{background:#eaf6f7;border-left:5px solid #007c90;padding:13px 15px;border-radius:6px;font-weight:600}
.foundation-stages{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.foundation-stages>div{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;background:#eaf4f8;border:1px solid #c8e0e9;border-radius:9px;padding:16px 7px}
.foundation-stages>div:not(:last-child)::after{content:'→';position:absolute;right:-13px;top:40%;font-size:20px;font-weight:800;color:#007c90;z-index:1}
.foundation-stages span{font-size:15px;font-weight:750;color:#16485b}
.foundation-stages small{font-size:12px;color:#526e7b}
.foundation-stages strong{font-size:15px;color:#007c90}
.foundation-summary{background:#eef7f8}
.foundation-summary>div:first-child{display:flex;align-items:center;justify-content:space-between;gap:12px}
.foundation-summary strong{font-size:23px;color:#143d4d}
.foundation-bar{height:18px;background:#c9dce3;border-radius:20px;overflow:hidden;margin:14px 0}
.foundation-bar>div{height:100%;background:#2a9c79;transition:width .12s ease}
.foundation-summary-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media(max-width:700px){.foundation-pressure{grid-template-columns:1fr}.foundation-stages{grid-template-columns:repeat(2,minmax(0,1fr))}.foundation-stages>div::after{display:none}.fundamentals .foundation-card{padding:14px}.foundation-summary>div:first-child{align-items:flex-start;flex-direction:column}}

.foundation-stage-icon{display:block;width:40px;height:40px;color:#007c90;flex-shrink:0}
.foundation-stages>div{justify-content:center;min-height:155px}

.sidebar-energy{margin-top:22px;padding:14px;background:#eff7f9;border:1px solid #c5e0e7;border-radius:12px}
.sidebar-energy h3{font-size:15px;margin:0 0 12px}
.sidebar-energy-chain{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px}
.sidebar-energy-chain>div{display:flex;flex-direction:column;align-items:center;text-align:center;gap:5px;background:white;border-radius:8px;padding:9px 3px;min-width:0}
.sidebar-energy-chain div>span{font-size:26px;color:#007c90}
.sidebar-energy-chain strong{font-size:12px}
.sidebar-energy-chain small{font-size:10px;line-height:1.3;min-height:25px}
.sidebar-energy-chain output{font-size:11px;font-weight:700;white-space:normal;overflow-wrap:anywhere}
.sidebar-energy-eff{display:grid;grid-template-columns:1fr auto;gap:6px;margin-top:13px;font-size:12px}
.sidebar-energy-track{grid-column:1/-1;height:7px;background:#cfdee4;border-radius:9px;overflow:hidden}
.sidebar-energy-track>div{height:100%;background:#168ca3}
.sidebar-energy-total{display:flex;justify-content:space-between;align-items:center;margin-top:15px;border-top:1px solid #c6dce3;padding-top:12px;font-size:13px;font-weight:700}
.sidebar-energy-total strong{font-size:20px;color:#007c90}
.sidebar-energy details{margin-top:14px;font-size:12px;line-height:1.55}
.sidebar-energy summary{cursor:pointer;font-weight:700;color:#007c90}

/* v44 — Blau pissarra suau: visual-only, accessible classroom palette */
:root{background:#dfe8ec;color:#203d4a}
body{background:#dfe8ec}
aside{background:#e5edf0;border-right-color:#bdcfd7}
.workspace{background:#dfe8ec}
.metrics>div,.telemetry,.characteristics,.explanation,.fundamentals .foundation-card{background:#edf3f5;border-color:#bfced5}
.metrics>div{box-shadow:0 1px 3px rgba(27,55,70,.04)}
.telemetry-grid>div,.foundation-readouts>div,.foundation-summary,.sidebar-energy-chain>div{background:#e0eaee;border-color:#bfced5}
.foundation-pressure,#characteristicChart,.formula,.curves-sidebar .curve-guide-formula{background:#dce8ed}
.foundation-stages>div{background:#dbe9ee;border-color:#b9d2dc}
.sidebar-energy{background:#d6e6eb;border-color:#b5d0da}
.note,.curves-sidebar .note,.foundation-exercise{background:#dcecef}
.foundation-summary{background:#d8e9ed}
.telemetry-heading button{background:#dbe9ee}
button,select{background:#f0f5f6;border-color:#adc4cd}
button:hover{background:#d7e8ed}
.app-header .header-analysis-switch button{background:#d7eaee}
.app-header .header-analysis-switch button[aria-pressed=true]{background:#007c90;color:#fff}
.characteristics .curve-result{background:#d5e9ef}
.characteristics .curve-result[data-status="outside"]{background:#f5e7ce}
.foundation-depth{background:#eaf2f5e8}

/* Five-position water density selector: compact single-line legend */
.foundation-water-selection{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:6px 16px;margin-top:7px}
.foundation-water-type{display:inline-flex;align-items:center;gap:7px;color:#12677b;font-size:.93rem;font-weight:700}
.foundation-water-type::before{content:'💧';font-size:1.1rem}
.foundation-water-hint{font-size:.76rem;color:#526a76}