/* Industrial Editorial · Modèle commun de cours A4 (projection inchangée). */
:root{--ink:#17313b;--deep:#102d39;--accent:#ca613c;--muted:#526974;--border:#d5dfe0;--paper:#fff;--background:#e8eeee}
*{box-sizing:border-box}
html{font-family:Arial,"Segoe UI",sans-serif;color:var(--ink);background:var(--background)}
body{margin:0}
.screen-toolbar{background:var(--deep);color:#fff;padding:16px clamp(14px,3vw,38px)}
.toolbar-inner{max-width:900px;margin:auto;display:flex;gap:24px;justify-content:space-between;align-items:center}
.toolbar-title strong{display:block;font-size:14px;font-weight:900;letter-spacing:.14em}
.toolbar-title span{display:block;margin-top:4px;font-size:12px;opacity:.8}
.toolbar-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.toolbar-actions a{color:#fff;text-decoration:none;font-size:13px;font-weight:700}
.toolbar-actions button{font:700 13px Arial,sans-serif;color:var(--deep);background:#fff;border:0;border-radius:6px;padding:12px 16px;cursor:pointer}
.toolbar-note{max-width:900px;margin:8px auto 0;font-size:11px;opacity:.8;line-height:1.4}
.printable-course{max-width:900px;margin:28px auto 55px;padding:17mm 17mm 20mm;background:white;box-shadow:0 15px 50px #1835401e;line-height:1.43}
.loading,.print-error{margin:30px auto;padding:24px;font-size:15px}
.course-identity{display:flex;align-items:start;justify-content:space-between;border-bottom:3px solid var(--accent);gap:20px;padding-bottom:10px;margin-bottom:17px}
.school-mark{font-size:11px;letter-spacing:.14em;font-weight:900}
.doc-kind{font-size:10px;color:#536b76;letter-spacing:.08em;text-align:right;text-transform:uppercase;font-weight:800}
.course-overline{font-size:10px;font-weight:900;color:#aa4b31;letter-spacing:.12em;text-transform:uppercase;margin:0 0 8px}
.course-title{font:normal 32px/1.13 Georgia,serif;color:#112e3a;letter-spacing:-.02em;margin:0 0 10px}
.course-meta{font-size:11px;color:#5a6d74;margin:0 0 14px;line-height:1.5}
.pupil-details{display:flex;gap:15px;justify-content:space-between;flex-wrap:wrap;font-size:11px;font-weight:700;border-block:1px solid #dfe6e7;padding:9px 0;margin-bottom:13px}
.topic{margin:15px 0 20px;padding-top:2px;break-inside:avoid-page;page-break-inside:avoid}
.topic-marker{font-size:9px;font-weight:900;letter-spacing:.11em;text-transform:uppercase;color:var(--accent);margin:0 0 5px}
.topic h2{font:normal 21px/1.18 Georgia,serif;margin:0 0 7px;color:#15313c}
.topic-lead{font-size:12px;line-height:1.53;margin:0 0 9px;color:#334c56}
.topic-list{padding-left:18px;margin:9px 0 0;list-style-type:disc}
.topic-list li{font-size:11px;line-height:1.46;margin:3px 0;padding-left:1px}
.topic-list li::marker{color:#bc613e}
.topic-takeaway{margin:11px 0 0;border-left:3px solid var(--accent);padding:8px 12px;background:#f2f6f5;font-size:11px;line-height:1.5}
.topic-takeaway strong{color:var(--deep)}
.print-diagram{padding:7px 13px 9px;border:1px solid var(--border);border-radius:6px;margin:12px 0}
.print-diagram svg{display:block;width:100%;height:auto;max-height:170px}
.print-diagram figcaption{font-size:10px;color:#5b6d75;margin-top:5px}
.figure-legend{display:flex;gap:12px;flex-wrap:wrap;font-size:10px;margin-top:5px;color:#344a53}
.swatch{display:inline-block;width:13px;height:3px;vertical-align:middle;margin-right:4px}
.swatch.hot{background:#c35b3a}.swatch.cold{background:#347c97}
.variable-table{border-collapse:collapse;width:100%;font-size:11px;margin:10px 0 7px;break-inside:avoid}
.variable-table th,.variable-table td{border:1px solid #dbe4e6;padding:6px 9px;text-align:left;vertical-align:top}
.variable-table th{background:#eff3f4;font-size:10px;text-transform:uppercase;letter-spacing:.03em}
.variable-table td:first-child{font-weight:800;font-size:14px;white-space:nowrap;width:12%}
.math-panel{border:1px solid #cbdadf;background:#f2f7f7;padding:12px 18px;margin:11px 0;break-inside:avoid}
.math-panel .math-label{display:block;text-transform:uppercase;font-size:9px;font-weight:900;letter-spacing:.1em;color:#91503a;margin-bottom:8px}
.math-primary{display:block;text-align:center;font-size:23px;font-weight:800;line-height:1.25;white-space:nowrap;letter-spacing:.01em;color:#0e2f3c}
.math-note{text-align:center;font-size:10px;color:#4d6871;margin-top:7px}
.math-line{font-size:13px;font-weight:700;line-height:1.45;margin:3px 0}
.math-result{font-size:18px;font-weight:900;color:#164b59;margin-top:6px}
.math-result small{font-weight:500;font-size:11px}
.formula-pair{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin:10px 0}
.formula-pair .math-panel{margin:0;padding:10px}
.formula-pair .math-primary{font-size:14px}
.math-fraction{display:inline-flex;vertical-align:middle;align-items:stretch;flex-direction:column;font-size:.82em;text-align:center;line-height:1.08;min-width:45px}
.math-fraction span:first-child{border-bottom:1.4px solid currentColor;padding:0 7px 2px}
.math-fraction span:last-child{padding:3px 7px 0}
.conversion-strip{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:9px;margin:10px 0;padding:11px 12px;background:#f3f6f5;border:1px solid #d8e1e1}
.conversion-strip b{font-size:14px}.conversion-strip em{font-style:normal;font-size:10px;color:#566d77}
.doc-conclusion{margin:15px 0 0;border-top:2px solid #d4dfe1;padding:10px 0 0;font-size:10px;color:#526570}
.doc-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:16px 0 0;padding-top:7px;border-top:1px solid #d7dfe2;font-size:9px;color:#667b84}
.doc-footer span:last-child{text-align:right}
sub{vertical-align:sub;font-size:.68em}
@media(max-width:650px){.toolbar-inner{display:block}.toolbar-actions{margin-top:14px}.printable-course{padding:22px 17px;margin:15px}.course-title{font-size:27px}.formula-pair{grid-template-columns:1fr}.math-primary{font-size:19px}.pupil-details{justify-content:flex-start}}
@page{
 size:A4 portrait;
 margin:13mm 15mm 17mm;
 @bottom-right{content:"Page " counter(page) " / " counter(pages);font:9pt Arial,sans-serif;color:#667780}
 @bottom-left{content:"STUDIO BP MIGCS · SUPPORT DE COURS";font:8pt Arial,sans-serif;color:#667780}
}
@media print{
 html,body{background:#fff!important;margin:0!important;padding:0!important}
 .screen-toolbar{display:none!important}
 .printable-course{padding:0!important;margin:0!important;max-width:none!important;box-shadow:none!important;font-size:10pt}
 .course-title{font-size:24pt}.course-meta{font-size:9pt;margin-bottom:9px}
 .course-identity{margin-bottom:11px;padding-bottom:7px}
 .pupil-details{margin:9px 0 10px;padding:7px 0}
 .topic{margin:17px 0 24px;break-inside:avoid-page;page-break-inside:avoid}
 .topic h2{font-size:15pt;margin-bottom:7px}
 .topic-lead{font-size:10pt;line-height:1.53}
 .topic-list{margin:10px 0 0}.topic-list li{font-size:9.4pt;line-height:1.49;margin:4px 0}
 .topic-takeaway{margin-top:12px;padding:9px 11px;font-size:9.2pt;line-height:1.52}
 .print-diagram{margin:7px 0;padding:4px 10px}
 .print-diagram svg{max-height:43mm}
 .print-diagram figcaption{font-size:8pt}
 .variable-table{margin:6px 0}.variable-table th,.variable-table td{padding:4px 8px;font-size:9pt}
 .variable-table td:first-child{font-size:11pt}
 .math-panel{margin:7px 0;padding:8px 13px}
 .math-primary{font-size:19pt}
 .formula-pair .math-primary{font-size:12pt}
 .math-line{font-size:11pt}.math-result{font-size:15pt}
 .conversion-strip{padding:7px;margin:7px 0}
 .doc-footer{margin-top:12px}
 .topic-takeaway,.math-panel,.conversion-strip,.variable-table,.print-diagram{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}


/* C01/C02 · Édition des repères et calculs techniques : pas de texte minuscule ou de suite de données serrées. */
.measurement-diagram{border:1px solid var(--border);border-radius:6px;padding:10px 14px 12px;margin:12px 0;break-inside:avoid;page-break-inside:avoid}
.measure-overline{font-weight:850;font-size:10px;text-transform:uppercase;color:#a84f35;letter-spacing:.08em;margin:0 0 5px}
.measurement-diagram svg{width:100%;height:auto;max-height:220px;display:block}
.measurement-notations{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin:9px 0 6px}
.measurement-notations>div{border-left:3px solid #416d79;background:#eff4f4;padding:6px 9px;min-width:0}
.measurement-notations strong{display:block;font-size:9px;letter-spacing:.015em;color:#45616b;line-height:1.3}
.measurement-notations span{display:block;font-size:11px;font-weight:800;margin-top:4px;overflow-wrap:normal}
.measurement-diagram figcaption{font-size:10px;color:#4c6871;margin-top:9px;line-height:1.5}
.calculation-panel{padding:12px 16px}
.calculation-row{display:flex;gap:10px;align-items:start;border-top:1px solid #d3e0e2;margin:0;padding:9px 0;font-size:12px;line-height:1.5}
.calculation-number{flex:0 0 22px;width:22px;height:22px;border-radius:4px;background:#dce9eb;display:flex;align-items:center;justify-content:center;font-weight:800;color:#2b515b}
.calculation-content{min-width:0;flex:1;overflow-wrap:normal}
.calculation-content strong{color:#143542;font-weight:850}
.calculation-units{border-top:1px solid #cedce0;margin:0;padding-top:7px;font-size:10.5px;line-height:1.5;color:#526a73}
.conversion-detail{background:#f2f6f5;border:1px solid #d3dee0;margin:10px 0;padding:12px 16px;break-inside:avoid-page;page-break-inside:avoid}
.conversion-detail>.math-label{display:block;font-size:10px;font-weight:850;text-transform:uppercase;color:#a75132;letter-spacing:.07em;margin-bottom:5px}
.conversion-equivalences{margin:5px 0 9px;font-size:11px;line-height:1.5}
.conversion-step{display:grid;grid-template-columns:150px minmax(0,1fr);gap:13px;padding:8px 0;border-top:1px solid #d5e0e2;font-size:12px;line-height:1.5}
.conversion-step>b{color:#355969;font-size:10.5px}
.conversion-step>span{font-weight:550;overflow-wrap:normal}
.conversion-last{background:#e9f1f2;margin-inline:-8px;padding-inline:8px}
.conversion-last strong{font-size:13px;color:#174d5e}
@media(max-width:650px){
 .measurement-notations{grid-template-columns:1fr}
 .conversion-step{grid-template-columns:1fr;gap:4px}
}
@media print{
 .measurement-diagram{margin:6px 0;padding:6px 10px 7px}
 .measurement-diagram svg{max-height:47mm}
 .measure-overline{font-size:8pt}
 .measurement-notations{grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;margin:5px 0}
 .measurement-notations>div{padding:4px 6px}
 .measurement-notations strong{font-size:7pt}
 .measurement-notations span{font-size:8.2pt}
 .measurement-diagram figcaption{font-size:8pt;margin-top:5px}
 .calculation-panel{padding:7px 11px}
 .calculation-row{font-size:9.2pt;padding:6px 0;gap:8px}
 .calculation-number{width:18px;height:18px;flex-basis:18px;font-size:8pt}
 .calculation-units{font-size:8.2pt}
 .conversion-detail{margin:6px 0;padding:8px 12px}
 .conversion-equivalences{font-size:9pt}
 .conversion-step{grid-template-columns:124px minmax(0,1fr);padding:6px 0;gap:9px;font-size:9.3pt}
 .conversion-step>b{font-size:8.1pt}
 .conversion-last strong{font-size:10pt}
 .measurement-diagram,.measurement-notations>div,.conversion-detail,.calculation-panel{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}

/* Schéma hydraulique A et exemple inverse C01 : repères visibles en A4, blocs non coupés. */
.inverse-example{background:#f6f8f7;border-left:3px solid #c76a47;padding:10px 14px;margin:10px 0;break-inside:avoid-page;page-break-inside:avoid}
.inverse-example>strong{display:block;text-transform:uppercase;letter-spacing:.04em;font-size:10px;color:#924931;line-height:1.4}
.inverse-calculation{display:flex;align-items:center;justify-content:center;gap:9px;font-weight:800;font-size:13px;margin:10px 0 7px;white-space:nowrap;color:#183944}
.inverse-calculation .math-fraction{font-size:12px}
.inverse-example>p{font-size:10px;color:#4f6972;margin:6px 0 0;line-height:1.5}
@media(max-width:650px){
 .inverse-calculation{font-size:11px;gap:4px}
 .inverse-calculation .math-fraction{font-size:10px}
}
@media print{
 .measurement-diagram{break-inside:avoid;page-break-inside:avoid}
 .measurement-diagram svg{max-height:47mm}
 .inverse-example{padding:7px 11px;margin:7px 0}
 .inverse-example>strong{font-size:8pt}
 .inverse-calculation{font-size:11pt;margin:6px 0 5px}
 .inverse-calculation .math-fraction{font-size:9.3pt}
 .inverse-example>p{font-size:8.4pt;margin-top:5px}
 .inverse-example{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}

/* Espace de notes : utile et explicitement identifié, jamais du vide forcé par diapositive. */
.pupil-note-area{margin:17px 0 6px;padding:12px 15px 4px;border:1px solid #d5e0e2;border-radius:5px;background:#fff;break-inside:avoid-page;page-break-inside:avoid}
.pupil-note-area strong{display:block;font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:#586f78}
.pupil-note-lines{height:126px;margin-top:9px;background:repeating-linear-gradient(to bottom,transparent 0,transparent 27px,#cfdbdf 27px,#cfdbdf 28px);background-size:100% 28px}
@media print{
 .pupil-note-area{margin:14px 0 6px;padding:9px 12px 2px}
 .pupil-note-area strong{font-size:8.5pt}
 .pupil-note-lines{height:31mm;margin-top:4px;background-size:100% 7mm;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(7mm - .2mm),#cfdbdf calc(7mm - .2mm),#cfdbdf 7mm)}
}


/* C02 : repérage de débit volumique et isolement DeltaT, imprimables. */
.c02-measurement-diagram .measurement-notations>div{border-left-color:#3d6f82}
.inverse-step{padding:7px 0;border-top:1px solid #d5e0e2;font-size:12px;line-height:1.5;color:#314c58}
.inverse-step b{font-weight:850;color:#173744}
@media print{
 .c02-measurement-diagram svg{max-height:41mm}
 .c02-measurement-diagram .measurement-notations span{font-size:7.9pt}
 .inverse-step{padding:5px 0;font-size:9pt}
 .inverse-step b{font-weight:800}
}


/* C02 : composer les chapitres sur la hauteur A4 sans sauts de page inutiles. */
@media print{
 .course-a1-s01-c02 .topic{break-inside:auto;page-break-inside:auto}
 .course-a1-s01-c02 .topic-marker,.course-a1-s01-c02 .topic h2{break-after:avoid;page-break-after:avoid}
 .course-a1-s01-c02 .topic-lead{break-after:avoid;page-break-after:avoid}
 .course-a1-s01-c02 .measurement-diagram,
 .course-a1-s01-c02 .print-diagram,
 .course-a1-s01-c02 .math-panel,
 .course-a1-s01-c02 .conversion-detail,
 .course-a1-s01-c02 .pupil-note-area{break-inside:avoid-page;page-break-inside:avoid}
}


/* Lien pédagogique C01 → C02 : encadré court, source de la comparaison = étape 01 C02. */
.course-bridge{border:1px solid #cfdcdf;border-left:4px solid #bd6544;background:#f2f6f6;padding:10px 14px;margin:10px 0 13px;break-inside:avoid-page;page-break-inside:avoid}
.course-bridge-title{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:#995039;display:block;margin-bottom:9px}
.course-bridge-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.course-bridge-card{background:white;border:1px solid #d9e4e5;padding:8px 11px;min-width:0}
.course-bridge-card strong{font-size:11px;color:#163a48;display:block;margin-bottom:4px}
.course-bridge-card span{font-size:11px;line-height:1.5;display:block}
.course-bridge-conclusion{font-weight:700;color:#30525c;font-size:11px;line-height:1.5;margin:9px 0 0}
@media(max-width:650px){.course-bridge-grid{grid-template-columns:1fr}}
@media print{
 .course-bridge{padding:7px 11px;margin:7px 0 10px}
 .course-bridge-title{font-size:8.5pt;margin-bottom:6px}
 .course-bridge-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
 .course-bridge-card{padding:6px 8px}
 .course-bridge-card strong{font-size:8.4pt}
 .course-bridge-card span{font-size:8.6pt;line-height:1.45}
 .course-bridge-conclusion{font-size:8.5pt;line-height:1.45;margin-top:6px}
 .course-bridge,.course-bridge-card{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}