/* Charte commune pascalpatry.fr */
:root{--navy:#243b58;--blue:#385d85;--ink:#293846;--muted:#536579;--paper:#f5f7fa;--line:#d8e2ed}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:19px/1.8 Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper)}a{color:var(--blue)}a:focus-visible{outline:3px solid #c58a30;outline-offset:3px}
.site-header{background:var(--navy);padding:30px 16px 23px;text-align:center;color:white}.brand{font-size:39px;font-weight:700;line-height:1.3;color:white;text-decoration:none}.tagline{margin:4px 0 0;color:#dce8f5;font-size:18px}.menu{background:#304c6b;border-bottom:3px solid #b8c9da}.menu ul{max-width:1150px;margin:auto;padding:5px 12px;display:flex;justify-content:center;flex-wrap:wrap;gap:3px;list-style:none}.menu a{display:block;padding:10px 13px;color:#fff;font-size:16px;font-weight:bold;text-decoration:none;border-radius:4px}.menu a:hover,.menu a:focus-visible{background:#466789}.menu a[aria-current=page]{background:#eaf1f8;color:var(--navy)}
main{max-width:1080px;margin:30px auto;padding:39px 48px 55px;background:#fff;border-radius:12px;box-shadow:0 3px 18px #0000000d;min-height:55vh}h1,h2,h3{color:var(--navy);line-height:1.4}h1{font-size:36px;text-align:center;margin:0 0 18px}h2{font-size:27px;margin:35px 0 15px}h3{font-size:22px;margin:0 0 8px}p{margin:0 0 21px}.lead{text-align:center;color:var(--muted);font-size:20px;max-width:850px;margin:0 auto 30px}.crumbs{font-size:15px;margin:0 0 23px;color:var(--muted)}.crumbs a{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:26px 0 35px}.tile{border:1px solid var(--line);background:#f0f5fa;border-radius:10px;padding:23px;display:flex;flex-direction:column}.tile p{font-size:17px;flex:1}.button{display:inline-block;align-self:flex-start;padding:10px 16px;border-radius:5px;background:var(--blue);color:#fff;text-decoration:none;font-size:16px;font-weight:600}.button:hover{background:var(--navy)}.note{margin:26px 0;padding:22px 26px;background:#f5f8fb;border-left:5px solid var(--blue);border-radius:0 8px 8px 0}.note p:last-child{margin-bottom:0}.footer{padding:25px;text-align:center;background:var(--navy);color:#e2eaf3;font-size:15px}.footer a{color:#fff}.footer p{margin:0 0 4px}.status{font-size:15px;color:var(--muted);font-style:italic}
@media(max-width:900px){body{font-size:18px}main{margin:15px auto;padding:28px 25px}h1{font-size:31px}.brand{font-size:35px}}
@media(max-width:600px){body{font-size:17px;background:#fff}.site-header{padding:22px 12px}.brand{font-size:29px}.tagline{font-size:15px}.menu ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));padding:6px}.menu a{text-align:center;padding:10px 5px;font-size:14px}main{margin:0;padding:25px 18px 35px;box-shadow:none;border-radius:0}h1{font-size:27px}h2{font-size:24px}h3{font-size:21px}.lead{font-size:18px}.grid{grid-template-columns:1fr;gap:15px}.tile{padding:20px}.note{padding:19px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Complements editoriaux communs */
section{scroll-margin-top:20px}main a{text-underline-offset:3px}.note h2{margin-top:0;font-size:23px}p,li{overflow-wrap:break-word}@media print{.site-header,.menu,.footer{display:none}main{box-shadow:none;margin:0;max-width:none;padding:0}body{background:white}}

/* V3 : paragraphes des chapitres et liens responsives */
main section:not(.tile):not(.note){margin-bottom:25px}main section:not(.tile):not(.note) p{max-width:78ch}main section.note{margin-top:35px}a{overflow-wrap:anywhere}

/* Navigation pedagogique V4 */
.breadcrumbs{font-size:15px;color:var(--muted);margin-bottom:22px}.breadcrumbs a{color:var(--blue)}.course-list{padding-left:1.5em;margin:12px 0 25px}.course-list li{margin-bottom:10px}.lesson-nav{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;border-top:1px solid var(--line);padding-top:18px;margin-top:35px;font-size:16px}.lesson-nav a,.course-button{display:inline-block;padding:9px 13px;background:var(--blue);color:white;text-decoration:none;border-radius:6px}.lesson-nav a:hover,.course-button:hover{background:var(--navy);color:#fff}.course-promo,.notice{margin:30px 0;padding:22px 25px;background:#edf4fa;border-left:4px solid var(--blue);border-radius:6px}.course-promo h2{margin:0 0 12px}.course-promo p:last-child{margin-bottom:0}.course-grid{margin:25px 0}.course-grid .card{min-width:0}.responsive-table{overflow-x:auto;margin:20px 0}.responsive-table table{border-collapse:collapse;width:100%;font-size:17px}.responsive-table th,.responsive-table td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}.responsive-table th{background:var(--navy);color:white}@media(max-width:600px){.course-promo,.notice{padding:17px}.lesson-nav{justify-content:center}.lesson-nav a{font-size:14px}.responsive-table table{font-size:15px}}

/* V6 : uniformisation des composants du site */
.site-footer{padding:25px;text-align:center;background:var(--navy);color:#e2eaf3;font-size:15px}.site-footer a{color:#fff}.site-footer p{margin:0 0 4px}.card{border:1px solid var(--line);background:#f0f5fa;border-radius:10px;padding:23px;min-width:0}.card a{font-weight:bold}.course-grid .card h3{margin-bottom:12px}.course-grid .card p{font-size:17px}.course-grid .card a{display:inline-block;margin-top:10px}.lesson-nav a:focus-visible{outline:3px solid #e2a451;outline-offset:3px}

.site-version-indicator{font-size:12px;opacity:.8;margin:7px 0 0}

/* V7 — zones distinctes de navigation, y compris sur mobile */
.lesson-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;column-gap:16px;row-gap:12px}
.lesson-nav a{display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.45;white-space:normal;overflow-wrap:break-word;min-width:0}
@media(max-width:650px){.lesson-nav{grid-template-columns:1fr;gap:10px}.lesson-nav a{display:block;text-align:center;padding:12px 14px}}

/* V9.1 — approfondissements pedagogiques */
.lesson-worked-example{margin-top:38px;padding-top:18px;border-top:2px solid #dce5ef}
.lesson-worked-example .correction{background:#edf4fa;border-left:4px solid #3e658a;padding:18px 22px;border-radius:6px;margin:17px 0 25px}
.lesson-worked-example .correction h3{margin-top:0}

.exercice-guide{margin:2rem 0;padding:1.2rem 1.35rem;background:#edf3f9;border-left:4px solid #365d84;border-radius:6px}.exercice-guide h2{margin-top:0}.exercice-guide h3{font-size:1.07em;margin:1.05em 0 .3em}.exercice-guide p{margin:.35em 0 .8em}