:root {
    --color-bg: #fff;
    --color-primary: #153463;
    --color-secondary: #2c3e50;
    --color-accent: #e0e7ef;
    --color-text: #20232a;
    --color-muted: #686868;
    --color-bordeaux: #8b2e3a;
    --color-darkgreen: #006400;
    --color-darkred: rgb(172, 0, 20);
    --color-darkblue: rgb(88, 78, 212);
    --box-radius: 12px;
    --shadow: 0 2px 10px rgba(21, 34, 58, 0.07);
    --border: 1px solid #dae3ec;
}
html {
    box-sizing: border-box;
    scroll-behavior: smooth;
}
*,
*:before,
*:after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
}
body {
    font-family: "Inter", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    padding-bottom: 80px;
}
.container {
    max-width: 980px;
    margin: 40px auto 64px auto;
    padding: 0 18px;
}
header {
    text-align: center;
    margin-bottom: 32px;
}
.main-title {
    font-family: "Merriweather", serif;
    font-size: 2.2em;
    color: var(--color-primary);
    margin-bottom: 8px;
}
.meta {
    color: var(--color-muted);
    font-size: 1em;
    margin-bottom: 12px;
}
h1,
h2,
h3 {
    font-family: "Merriweather", serif;
    font-weight: 400;
    color: var(--color-primary);
}
h1 {
    font-size: 2em;
    margin: 30px 0 16px 0;
}
h2 {
    font-size: 1.5em;
    margin: 30px 0 16px 0;
}
h3 {
    font-size: 1.15em;
    margin: 25px 0 12px 0;
}
p {
    margin-bottom: 18px;
    font-size: 1.03em;
    color: var(--color-text);
}

/* === TABLE DES MATIÈRES EN ACCORDÉON === */
.toc-accordion {
    background: rgb(248, 248, 250);
    border: var(--border);
    border-radius: var(--box-radius);
    border-left: 5px solid var(--color-bordeaux);
    padding: 0 1.2em 0 1.2em;
    margin: 20px 0 40px 0;
    overflow: hidden;
}

.toc-accordion summary {
    /*     font-family: 'Merriweather', serif;
      font-size: 1.2em;
      font-weight: 400; */
    color: var(--color-primary);
    cursor: pointer;
    padding: 0 1.4em 0 1.4em;
    position: relative;
    list-style: none;
    background: rgb(248, 248, 250);
    transition: background 0.2s;
}

.toc-accordion summary::-webkit-details-marker,
.toc-accordion summary::marker {
    display: none;
}

.toc-accordion summary::after {
    content: "▼";
    position: absolute;
    right: 1.4em;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8 em;
    color: #153463;
    transition: transform 0.3s ease;
}

.toc-accordion[open] summary::after {
    transform: translateY(-50%) rotate(180deg);
}

.toc-accordion summary:hover {
    background: #f0f0f2;
}

.toc-content {
    padding: 0 1.4em 1.2em 1.4em;
    background: rgb(248, 248, 250);
}

.toc-content ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-content li {
    margin: 10px 0;
    text-align: left;
}

.toc-content a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    display: block;
    padding: 4px 0;
}

.toc-content a:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}

/* === RÉSUMÉ EXÉCUTIF EN ACCORDÉON === */
.executive-summary-accordion {
    background: rgb(248, 248, 250);
    border: var(--border);
    border-radius: var(--box-radius);
    border-left: 5px solid var(--color-darkgreen);
    padding: 0 1.2em 0 1.2em;
    margin: 20px 0 40px 0;
    overflow: visible;
}

.executive-summary-accordion summary {
    /*      font-family: 'Merriweather', serif;
      font-size: 1.2em;
      font-weight: 400; */
    color: var(--color-primary);
    cursor: pointer;
    padding: 0 1.4em 0 1.4em;
    position: relative;
    list-style: none;
    background: rgb(248, 248, 250);
    transition: background 0.2s;
}

.executive-summary-accordion summary::-webkit-details-marker,
.executive-summary-accordion summary::marker {
    display: none;
}

.executive-summary-accordion summary::after {
    content: "▼";
    position: absolute;
    right: 1.4em;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8 em;
    color: #153463;
    transition: transform 0.3s ease;
}

.executive-summary-accordion[open] summary::after {
    transform: translateY(-50%) rotate(180deg);
}

.executive-summary-accordion summary:hover {
    background: #f0f0f2;
}

.executive-summary-content {
    padding: 0 1.4em 1.2em 1.4em;
    background: rgb(248, 248, 250);
    text-align: left;
}

/* === BLOC DE RÉFÉRENCE ACADÉMIQUE === */
.academic-reference {
    background: rgb(248, 248, 250);
    border-left: 5px solid var(--color-darkblue);
    border-radius: var(--box-radius) var(--box-radius);
    padding: 1.5em 1.8em;
    margin: 40px 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.academic-reference h2 {
    font-family: "Merriweather", serif;
    font-size: 1.35em;
    color: var(--color-primary);
    margin: 0 0 16px 0;
    font-weight: 400;
}
.academic-citation {
    font-size: 1em;
    line-height: 1.6;
    color: #4a5568;
    font-style: normal;
    margin-bottom: 16px;
}
.academic-reference p:last-child {
    font-style: normal;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 0;
}

/* === POINTS ESSENTIELS (KEY TAKEAWAYS) === */
.key-takeaways {
    background: rgb(248, 248, 250);
    border-left: 5px solid var(--color-bordeaux);
    border-radius: var(--box-radius);
    padding: 1.5em 1.8em;
    margin: 40px 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.key-takeaways h2 {
    font-family: "Merriweather", serif;
    font-size: 1.35em;
    color: var(--color-primary);
    margin: 0 0 16px 0;
    font-weight: 400;
}
.key-takeaways ul {
    margin: 0;
    padding-left: 20px;
}
.key-takeaways li {
    margin-bottom: 10px;
    color: var(--color-text);
}

blockquote {
    border-left: 4px solid var(--color-primary);
    background: #f4f6f8;
    margin: 16px 0;
    padding: 0.95em 1.2em;
    color: #444;
}
ul,
ol {
    margin: 15px 0 18px 20px;
    padding-left: 18px;
}
li {
    margin-bottom: 7px;
}

/* === STYLES POUR IMAGES RESPONSIVE 16/9 === */
.responsive-image {
    width: 100%;
    margin: 32px 0;
    border-radius: var(--box-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.responsive-image img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}
.hero-image-container {
    width: 100%;
    margin-bottom: 32px;
    border-radius: var(--box-radius);
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(21, 34, 58, 0.12);
}
.hero-image-container img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}
figure.image-figure {
    width: 100%;
    margin: 32px 0;
}
figure.image-figure .responsive-image {
    margin: 0 0 8px 0;
}
figcaption {
    text-align: center;
    font-size: 0.9em;
    color: var(--color-muted);
    font-style: italic;
}

/* === SECTION FAQ AVEC ACCORDÉON === */
.faq {
    background: #fff;
    border: var(--border);
    border-radius: var(--box-radius);
    box-shadow: var(--shadow);
    padding: 0 1.8em;
    margin: 32px 0 40px 0;
}
.faq h2 {
    font-family: "Merriweather", serif;
    font-size: 1.8em;
    margin-bottom: 24px;
    color: var(--color-primary);
    font-weight: 400;
}
.faq-item {
    border-bottom: 1px solid #e5e7eb;
    padding: 0 0;
}
.faq-item:last-child {
    border-bottom: none;
}
.faq-item summary {
    font-family: "Merriweather", serif;
    font-size: 1.1em;
    font-weight: 400;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0 40px 12px 0;
    position: relative;
    list-style: none;
    transition: color 0.2s;
    line-height: 1.5;
}
.faq-item summary::-webkit-details-marker,
.faq-item summary::marker {
    display: none;
}
.faq-item summary::after {
    content: "▼";
    position: absolute;
    right: 1.4em;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8 em;
    color: #153463;
    transition: transform 0.3s ease;
}
.faq-item[open] summary::after {
    transform: translateY(-50%) rotate(180deg);
}
.faq-item summary:hover {
    color: var(--color-secondary);
}
.faq-answer {
    padding: 0 0 8px 0;
    font-size: 1.03em;
    line-height: 1.7;
    color: var(--color-text);
    animation: fadeIn 0.3s ease-in-out;
}
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === ARTICLES SIMILAIRES (sans cadre) === */
.related {
    margin: 40px 0;
}
.related h2 {
    font-family: "Merriweather", serif;
    font-size: 1.8em;
    margin-bottom: 24px;
    color: var(--color-primary);
    font-weight: 400;
}
.related-article {
    margin-bottom: 32px;
}
.related-article h3 {
    font-family: "Merriweather", serif;
    font-size: 1.25em;
    margin-bottom: 8px;
    color: var(--color-primary);
}
.related-article h3 a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}
.related-article h3 a:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}
.related-article p {
    margin: 0;
    color: var(--color-text);
    line-height: 1.6;
}

footer {
    margin-top: 58px;
    text-align: center;
    color: var(--color-muted);
    font-size: 0.95em;
    padding-bottom: 26px;
}

/* === BARRE DE NAVIGATION FIXE EN BAS === */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    border-top: 1px solid #e5e7eb;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    padding: 0;
}
.bottom-nav-container {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0;
}
.bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #374151;
    padding: 12px 20px;
    font-size: 0.85em;
    transition: all 0.2s;
    min-width: 80px;
    border-right: 1px solid #f3f4f6;
}
.bottom-nav a:last-child {
    border-right: none;
}
.bottom-nav a:hover {
    background: #f9fafb;
    color: var(--color-primary);
}
.icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    margin-bottom: 4px;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .responsive-image,
    .hero-image-container {
        border-radius: 8px;
        margin: 24px 0;
    }
    h1,
    .main-title {
        font-size: 1.8em;
        margin-top: 25px;
    }
    .academic-reference,
    .key-takeaways {
        padding: 1.2em 1.4em;
        margin: 32px 0;
    }
    .toc-accordion summary,
    .executive-summary-accordion summary {
        padding: 1em 1.2em;
        font-size: 1.1em;
    }
    .toc-content,
    .executive-summary-content {
        padding: 0 1.2em 1em 1.2em;
    }
    .faq {
        padding: 1.2em 1.3em;
    }
    h2,
    .faq h2,
    .related h2 {
        font-size: 1.5em;
    }
    .faq-item summary {
        font-size: 1em;
        padding-right: 35px;
    }
    .faq-item summary::after {
        width: 20px;
        height: 20px;
    }
    .bottom-nav a {
        padding: 10px 12px;
        font-size: 0.75em;
        min-width: 60px;
    }
    .icon {
        width: 18px;
        height: 18px;
    }
}

/* === SECTION CONTENU ASSOCIÉ (PAGES FILLES) === */

.related-content {
    background: rgb(248, 248, 250);
    border: var(--border);
    border-left: 5px solid var(--color-darkred);
    border-radius: var(--box-radius);
    padding: 1em;
    margin: 20px 40px;
    box-shadow: 0 2px 8px rgba(21, 34, 58, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* Container de lien englobant tout */
.related-content a {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* État hover global */
.related-content:hover {
    box-shadow: 0 4px 16px rgba(21, 34, 58, 0.14);
    border-left-color: var(--color-secondary);
    background: rgb(245, 247, 250);
}

/* Titre de la section fille */
.related-content h3 {
    font-family: "Merriweather", serif;
    font-size: 1.1em;
    color: var(--color-primary);
    margin: 0 0 12px 0;
    font-weight: 400;
    transition: color 0.2s ease;
}

.related-content:hover h3 {
    color: var(--color-secondary);
}

/* Description / résumé */
.related-content p {
    font-size: 1.03em;
    line-height: 1.7;
    color: var(--color-text);
    margin: 0;
    padding-right: 40px; /* Espace pour l'icône flèche */
}

/* Icône indicatrice (flèche) */
.related-content::after {
    content: "→";
    position: absolute;
    right: 1.8em;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.8em;
    color: var(--color-primary);
    transition:
        transform 0.3s ease,
        color 0.3s ease;
}

.related-content:hover::after {
    transform: translateY(-50%) translateX(4px);
    color: var(--color-secondary);
}

/* Cursor pointer sur toute la section */
.related-content {
    cursor: pointer;
}

/* Version dark mode / data attribute */
@media (prefers-color-scheme: dark) {
    .related-content {
        background: rgba(248, 248, 250, 0.08);
        border-color: rgba(255, 255, 255, 0.1);
    }

    .related-content:hover {
        background: rgba(248, 248, 250, 0.12);
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .related-content {
        padding: 1.4em;
        margin: 32px 0;
    }

    .related-content h3 {
        font-size: 1.15em;
    }

    .related-content p {
        font-size: 1em;
        padding-right: 28px;
    }

    .related-content::after {
        font-size: 1.5em;
    }
}

/* === SECTION HEADER === */

@font-face {
    font-family: "NotoSerifCJKsc-Regular";
    src: url("https://assets-persist.lovart.ai/agent-static-assets/NotoSerifCJKsc-Regular.otf")
        format("opentype");
}
@font-face {
    font-family: "NotoSerifCJKsc-Bold";
    src: url("https://assets-persist.lovart.ai/agent-static-assets/NotoSerifCJKsc-Bold.otf")
        format("opentype");
}
@font-face {
    font-family: "MiSans-Regular";
    src: url("https://assets-persist.lovart.ai/agent-static-assets/MiSans-Regular.ttf")
        format("truetype");
}
/*@font-face {
    font-family: "MiSans-Bold";
    src: url("https://assets-persist.lovart.ai/agent-static-assets/MiSans-Bold.ttf")
        format("truetype");
}*/

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.header-container {
    width: 945px;
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    border-radius: var(--box-radius);
    padding: 0px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-top: -30px;
}

/* Decorative Elements */
.deco-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #d4145a 0%, #2c3e50 100%);
}

.left-section {
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.portrait {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #ffffff;
    box-shadow: 0 8px 24px rgba(212, 20, 90, 0.15);
    transition: transform 0.3s ease;
}

.portrait:hover {
    transform: scale(1.05);
}

.center-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0 20px;
    text-align: center;
}

.title-leadership {
    font-family: "NotoSerifCJKsc-Bold", serif;
    font-size: 36px;
    color: #2c3e50;
    letter-spacing: 2px;
    margin-top: 35px;
    margin-bottom: 8px;
    text-transform: uppercase;
    position: relative;
}

.title-leadership::after {
    content: "";
    display: block;
    width: 40px;
    height: 2px;
    background-color: #d4145a;
    margin: 8px auto 0;
}

.subtitle-friction {
    font-family: "MiSans-Regular", sans-serif;
    font-size: 20px;
    color: #888;
    letter-spacing: 4px;
    font-weight: 300;
}

.right-section {
    flex: 0 0 auto;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.logo {
    height: 50px;
    width: auto;
    object-fit: contain;
}

/* Responsive Design */
@media (max-width: 944px) and (min-width: 768px) {
    .header-container {
        width: 100%;
        padding: 10px 20px;
    }

    .portrait {
        width: 130px;
        height: 130px;
    }

    .title-leadership {
        font-size: 28px;
    }

    .subtitle-friction {
        font-size: 16px;
    }

    .logo {
        height: 40px;
    }
}

@media (max-width: 767px) {
    .header-container {
        width: 100%;
        flex-direction: column;
        padding: 0px 0px 0 0px;
        gap: 0px;
        margin-bottom: -10px;
    }

    .left-section,
    .center-section,
    .right-section {
        width: 100%;
        justify-content: center;
    }

    .center-section {
        padding: 0px 0;
    }

    .portrait {
        margin-top: 10px;
        margin-bottom: -30px;
        width: 120px;
        height: 120px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

    .title-leadership {
        font-size: 32px;
    }

    .subtitle-friction {
        font-size: 18px;
    }

    .logo {
        height: 30px;
        margin-bottom: 10px;
    }
}
/* === SECTION FOOTER === */
.footer {
    background: rgb(249, 245, 242);
    border: var(--border);
    border-radius: var(--box-radius);
    box-shadow: var(--shadow);
    padding: 0 1.8em;
    margin: 32px 0 40px 0;
}
.footer h2 {
    font-family: "Merriweather", serif;
    font-size: 1.6em;
    margin-bottom: 24px;
    color: var(--color-primary);
    font-weight: 400;
}
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}