/* DELTA-SIERRA V21.29 — shell canonique hors Mars.
   Header physique dans le HTML final. JS limité aux interactions. */
:root{--ds-shell-navy:#0b2447;--ds-shell-navy-2:#17385f;--ds-shell-red:#c63a37;--ds-shell-red-dark:#a52b29;--ds-shell-text:#10213a;--ds-shell-line:#dce3eb;--ds-shell-focus:#f5c74d;--ds-shell-max:1560px}
.ds-shell{position:relative;z-index:10000;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ds-shell-text)}.ds-shell *{box-sizing:border-box}.ds-shell__top{background:var(--ds-shell-navy);color:#fff}.ds-shell__top-inner{width:min(var(--ds-shell-max),100%);margin:0 auto;padding:16px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px}.ds-shell__brand{display:flex;align-items:center;gap:14px;color:#fff!important;text-decoration:none!important;min-width:0}.ds-shell__mark{display:block;width:54px;height:54px;flex:0 0 54px;border-radius:12px;object-fit:cover;box-shadow:0 4px 14px rgba(0,0,0,.22)}.ds-shell__brand>span{display:flex;flex-direction:column;min-width:0}.ds-shell__brand strong{font-size:26px;line-height:1;font-weight:900;letter-spacing:.045em;white-space:nowrap;color:#fff}.ds-shell__brand small{margin-top:6px;font-size:12.5px;font-weight:650;color:rgba(255,255,255,.9);white-space:nowrap}.ds-shell__actions{display:flex;align-items:center;justify-content:flex-end;gap:16px}.ds-shell__languages{position:relative}.ds-shell__lang-toggle{display:flex;align-items:center;justify-content:center;gap:6px;min-height:46px;padding:9px 17px;border:0;border-radius:999px;background:#fff;cursor:pointer;box-shadow:0 3px 12px rgba(0,0,0,.16);transition:transform .16s ease,box-shadow .16s ease,background .16s ease}.ds-shell__lang-toggle img,.ds-shell__lang-option img{display:block;width:20px;height:14px;object-fit:cover;border-radius:2px;border:1px solid rgba(8,41,78,.18)}.ds-shell__lang-toggle:hover,.ds-shell__lang-toggle:focus-visible{background:#fff7d8;transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.22);outline:3px solid var(--ds-shell-focus);outline-offset:2px}.ds-shell__lang-panel{position:absolute;right:0;top:calc(100% + 9px);z-index:10010;min-width:280px;padding:9px;background:#fff;border:1px solid #cbd6e2;border-radius:14px;box-shadow:0 20px 45px rgba(0,0,0,.28)}.ds-shell__lang-panel[hidden]{display:none!important}.ds-shell__lang-option{display:flex;align-items:center;gap:10px;padding:10px 11px;border-radius:9px;color:#0b2d52!important;text-decoration:none!important;font-weight:760;line-height:1.25}.ds-shell__lang-option:hover,.ds-shell__lang-option:focus-visible{background:#eaf1f8;color:#a60000!important;outline:2px solid #17385f;outline-offset:1px}.ds-shell__lang-option[aria-current="page"]{background:#0b2d52;color:#fff!important}.ds-shell__support{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 22px;border-radius:5px;background:var(--ds-shell-red);color:#fff!important;text-decoration:none!important;font-weight:850;white-space:nowrap;box-shadow:0 3px 10px rgba(0,0,0,.13);transition:background .16s ease,transform .16s ease,box-shadow .16s ease}.ds-shell__support:hover,.ds-shell__support:focus-visible{background:var(--ds-shell-red-dark);transform:translateY(-2px);box-shadow:0 8px 18px rgba(0,0,0,.2);outline:3px solid var(--ds-shell-focus);outline-offset:2px}
.ds-shell__nav{background:#fff;border-bottom:1px solid var(--ds-shell-line);box-shadow:0 1px 0 rgba(8,41,78,.03)}.ds-shell__nav-inner{width:min(1420px,100%);margin:0 auto;padding:5px 18px;display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:nowrap}.ds-shell__nav-link{position:relative;display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:8px 11px;border-radius:7px;color:#1c2e45!important;background:transparent;text-decoration:none!important;font-size:14px;font-weight:690;line-height:1.15;white-space:nowrap;transition:background .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease}.ds-shell__nav-link:hover,.ds-shell__nav-link:focus-visible{background:var(--ds-shell-navy);color:#fff!important;transform:translateY(-2px);box-shadow:0 5px 14px rgba(8,41,78,.2);outline:none}.ds-shell__nav-link[aria-current="page"]{font-weight:900;color:#09294e!important}.ds-shell__nav-link[aria-current="page"]::after{content:"";position:absolute;left:50%;bottom:2px;width:28px;height:3px;border-radius:4px;transform:translateX(-50%);background:#c63a37}
/* FRANCE : petit filet tricolore toujours visible, qui s'élargit au hover/focus. */
.ds-shell__nav-link--france::after,.ds-shell__nav-link--france[aria-current="page"]::after{content:"";position:absolute;left:50%;right:auto;bottom:2px;width:26px;height:3px;border-radius:999px;opacity:1;transform:translateX(-50%);background:linear-gradient(90deg,#1e4f9e 0 33.333%,#fff 33.333% 66.666%,#df3138 66.666% 100%);box-shadow:0 0 0 1px rgba(10,35,70,.10);transition:width .24s cubic-bezier(.2,.75,.25,1),height .2s ease,box-shadow .2s ease}.ds-shell__nav-link--france:hover::after,.ds-shell__nav-link--france:focus-visible::after{width:70px;height:4px;box-shadow:0 2px 8px rgba(20,55,95,.20)}.ds-shell__nav-link--france[aria-current="page"]::after{width:34px}.ds-shell__nav-link--france[aria-current="page"]:hover::after,.ds-shell__nav-link--france[aria-current="page"]:focus-visible::after{width:76px}.ds-shell__nav-link--mars{color:#8e2b1e!important;font-weight:800}
.ds-shell__mobile{display:none;background:#fff;border-bottom:1px solid var(--ds-shell-line)}.ds-shell__mobile-toggle{width:100%;padding:12px 16px;border:0;background:#fff;text-align:left;color:#0c274a;font-weight:850;cursor:pointer}.ds-shell__mobile-toggle:focus-visible{outline:3px solid var(--ds-shell-focus);outline-offset:-3px}.ds-shell__mobile-panel{display:grid;padding:4px 12px 14px;gap:4px}.ds-shell__mobile-panel[hidden]{display:none!important}.ds-shell__mobile-panel .ds-shell__nav-link{display:block;min-height:auto;text-align:left;justify-content:flex-start}.ds-shell__mobile-panel .ds-shell__nav-link::after{display:none}
/* Interactions communes : pas de réimplémentation page par page. */
.home-overview__actions a,.home-field a,.plan-primary-actions a,.buy-btn,.cat-btn,.book-actions a,.card-actions a,.knowledge-gateway-v2069>a:last-child{transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease,box-shadow .16s ease!important}.knowledge-gateway-v2069>a:last-child{display:inline-flex!important;align-items:center!important;min-height:42px!important;padding:8px 10px!important;margin-top:auto!important;margin-left:-10px!important;border-radius:8px!important;color:#953016!important;text-decoration:none!important;font-weight:900!important;cursor:pointer!important}.knowledge-gateway-v2069>a:last-child:hover,.knowledge-gateway-v2069>a:last-child:focus-visible{background:#953016!important;color:#fff!important;transform:translateY(-2px)!important;box-shadow:0 7px 18px rgba(149,48,22,.2)!important;outline:3px solid #f2c24e!important;outline-offset:2px!important}
.knowledge-gateways-v2069{width:min(1180px,calc(100% - 32px))!important;max-width:1180px!important;margin:30px auto!important;padding:0 4px!important}.knowledge-gateways-v2069__grid{display:grid!important;grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:18px!important}.knowledge-gateway-v2069{min-width:0!important}.home-overview__inner{width:min(1120px,calc(100% - 32px))!important;margin-inline:auto!important}
*,*::before,*::after{box-sizing:border-box}main img,main svg,main video,main canvas,main iframe,.article-body img,.seo-main img{max-width:100%;height:auto}figure{max-width:100%}table{max-width:100%}pre{max-width:100%!important;overflow-x:auto!important;-webkit-overflow-scrolling:touch}code,kbd,samp{overflow-wrap:anywhere}main,.article-body,.seo-main,.knowledge-shell,.ds-econ-school,.ds-main,.site-main{min-width:0}.ds-glossary-short{display:block;max-width:min(420px,calc(100vw - 24px));box-sizing:border-box}
/* Breakpoint AVANT le premier wrap desktop observé en V21.28. */
@media(max-width:1140px){.ds-shell__nav{display:none}.ds-shell__mobile{display:block}.ds-shell__top-inner{padding:14px 18px;gap:14px}.ds-shell__brand strong{font-size:22px}.ds-shell__brand small{font-size:11.5px}.ds-shell__mark{width:46px;height:46px;flex-basis:46px}.ds-shell__actions{gap:10px}.ds-shell__support{padding:10px 14px;font-size:13px}.knowledge-gateways-v2069__grid{grid-template-columns:1fr!important}}
@media(max-width:620px){.ds-shell__top-inner{align-items:flex-start;flex-direction:column}.ds-shell__actions{width:100%;justify-content:space-between}.ds-shell__lang-panel{left:0;right:auto;min-width:min(280px,calc(100vw - 32px))}.ds-shell__support{min-height:43px;padding:9px 12px}.ds-shell__brand strong{font-size:19px}.ds-shell__brand small{white-space:normal}.knowledge-gateways-v2069{width:min(100% - 20px,1180px)!important}}
@media(max-width:420px){.ds-shell__top-inner{padding:12px}.ds-shell__actions{display:grid;grid-template-columns:1fr;gap:8px}.ds-shell__lang-toggle,.ds-shell__support{width:100%}.ds-shell__lang-toggle{padding-inline:10px}.ds-shell__support{white-space:normal;text-align:center}.ds-shell__lang-panel{width:100%;min-width:0}.ds-shell__brand{gap:10px}.ds-shell__mark{width:42px;height:42px;flex-basis:42px}.ds-shell__brand strong{font-size:18px;letter-spacing:.025em}}
@media(prefers-reduced-motion:reduce){.ds-shell *,.knowledge-gateway-v2069>a:last-child{transition:none!important}.ds-shell a:hover,.knowledge-gateway-v2069>a:last-child:hover{transform:none!important}}