:root {
            --bleu: #173f5f;
            --bleu-fonce: #102d44;
            --bleu-clair: #2d6f95;
            --vert: #4f7654;
            --vert-clair: #8faf7f;
            --ocre: #c88a3d;
            --or: #d9a441;
            --creme: #f6f1e7;
            --blanc: #ffffff;
            --gris: #64707b;
            --gris-clair: #eef1f2;
            --texte: #25313a;
            --rouge: #9e3d32;
            --ombre: 0 15px 45px rgba(18, 38, 52, .12);
            --rayon: 18px;
            --largeur: 1200px;
        }

        /* =========================================================
           RESET
        ========================================================= */

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family:
                Inter,
                system-ui,
                -apple-system,
                BlinkMacSystemFont,
                "Segoe UI",
                sans-serif;

            color: var(--texte);
            background: #f8f8f6;
            line-height: 1.7;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        p {
            margin-bottom: 1rem;
        }

        h1,
        h2,
        h3,
        h4 {
            font-family:
                Georgia,
                "Times New Roman",
                serif;
            line-height: 1.2;
        }

        .container {
            width: min(92%, var(--largeur));
            margin: auto;
        }

        /* =========================================================
           BARRE DE NAVIGATION
        ========================================================= */

        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(16, 45, 68, .96);
            backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, .12);
        }

        .nav {
            min-height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 25px;
        }

        .logo {
            color: white;
            font-family: Georgia, serif;
            font-size: 1.45rem;
            font-weight: bold;
            white-space: nowrap;
        }

        .logo span {
            color: var(--or);
        }

        .nav-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: flex-end;
            gap: 5px;
            list-style: none;
        }

        .nav-links a {
            color: #fff;
            font-size: .85rem;
            padding: 8px 10px;
            border-radius: 8px;
            transition: .25s;
        }

        .nav-links a:hover {
            background: rgba(255,255,255,.12);
            color: #ffd77d;
        }

        /* =========================================================
           HERO
        ========================================================= */

        .hero {
            min-height: 720px;
            position: relative;
            overflow: hidden;
            color: white;

            background:
                linear-gradient(
                    120deg,
                    rgba(16,45,68,.97),
                    rgba(23,63,95,.82),
                    rgba(43,79,65,.72)
                );
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;

            background:
                radial-gradient(
                    circle at 80% 20%,
                    rgba(217,164,65,.35),
                    transparent 25%
                ),
                radial-gradient(
                    circle at 20% 80%,
                    rgba(143,175,127,.2),
                    transparent 30%
                );
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 120px 0 80px;
            max-width: 850px;
        }

        .badge {
            display: inline-block;
            padding: 7px 14px;
            border: 1px solid rgba(255,255,255,.3);
            border-radius: 50px;
            margin-bottom: 25px;
            background: rgba(255,255,255,.08);
            font-size: .85rem;
            letter-spacing: .08em;
            text-transform: uppercase;
        }

        .hero h1 {
            font-size: clamp(3rem, 8vw, 6.5rem);
            margin-bottom: 25px;
            letter-spacing: -.04em;
        }

        .hero h1 span {
            color: var(--or);
        }

        .hero-intro {
            max-width: 780px;
            font-size: 1.25rem;
            color: #e7eef2;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 35px;
        }

        .button {
            display: inline-block;
            padding: 13px 20px;
            border-radius: 10px;
            font-weight: bold;
            transition: .25s;
        }

        .button-primary {
            background: var(--or);
            color: #1b2a32;
        }

        .button-primary:hover {
            transform: translateY(-2px);
            filter: brightness(1.08);
        }

        .button-secondary {
            border: 1px solid rgba(255,255,255,.4);
            color: white;
        }

        .button-secondary:hover {
            background: rgba(255,255,255,.1);
        }

        /* =========================================================
           STATISTIQUES
        ========================================================= */

        .stats {
            margin-top: -55px;
            position: relative;
            z-index: 10;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            background: white;
            border-radius: var(--rayon);
            box-shadow: var(--ombre);
            overflow: hidden;
        }

        .stat {
            padding: 28px 20px;
            text-align: center;
            border-right: 1px solid #eee;
        }

        .stat:last-child {
            border-right: none;
        }

        .stat strong {
            display: block;
            color: var(--bleu);
            font-family: Georgia, serif;
            font-size: 2rem;
        }

        .stat span {
            color: var(--gris);
            font-size: .9rem;
        }

        /* =========================================================
           SECTIONS
        ========================================================= */

        section {
            padding: 100px 0;
        }

        .section-header {
            max-width: 820px;
            margin-bottom: 55px;
        }

        .eyebrow {
            color: var(--ocre);
            text-transform: uppercase;
            letter-spacing: .14em;
            font-size: .78rem;
            font-weight: bold;
            margin-bottom: 10px;
        }

        .section-title {
            color: var(--bleu);
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            margin-bottom: 18px;
        }

        .section-subtitle {
            color: var(--gris);
            font-size: 1.08rem;
        }

        /* =========================================================
           INTRODUCTION
        ========================================================= */

        .intro {
            background: var(--creme);
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 60px;
            align-items: center;
        }

        .intro-text {
            font-size: 1.08rem;
        }

        .intro-card {
            background: white;
            padding: 35px;
            border-radius: var(--rayon);
            box-shadow: var(--ombre);
            border-top: 5px solid var(--ocre);
        }

        .intro-card h3 {
            color: var(--bleu);
            margin-bottom: 15px;
            font-size: 1.6rem;
        }

        .intro-card ul {
            list-style: none;
        }

        .intro-card li {
            padding: 10px 0;
            border-bottom: 1px solid #eee;
        }

        .intro-card li:last-child {
            border-bottom: none;
        }

        .intro-card strong {
            color: var(--bleu);
        }

        /* =========================================================
           FRAGMENT / CITATION
        ========================================================= */

        .quote {
            margin: 35px 0;
            padding: 25px 30px;
            border-left: 5px solid var(--or);
            background: rgba(255,255,255,.6);
            font-family: Georgia, serif;
            font-size: 1.15rem;
            font-style: italic;
        }

        /* =========================================================
           CARTES DE PÉRIODES
        ========================================================= */

        .periods {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .period-card {
            background: white;
            border-radius: var(--rayon);
            padding: 30px;
            box-shadow: 0 8px 30px rgba(18,38,52,.07);
            border: 1px solid #e7e8e8;
            transition: .25s;
        }

        .period-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--ombre);
        }

        .period-icon {
            width: 52px;
            height: 52px;
            display: grid;
            place-items: center;
            border-radius: 14px;
            background: var(--gris-clair);
            font-size: 1.5rem;
            margin-bottom: 18px;
        }

        .period-card h3 {
            color: var(--bleu);
            margin-bottom: 10px;
            font-size: 1.45rem;
        }

        .period-date {
            color: var(--ocre);
            font-weight: bold;
            font-size: .85rem;
            margin-bottom: 12px;
        }

        /* =========================================================
           CHRONOLOGIE
        ========================================================= */

        .timeline-section {
            background: #f0f3f2;
        }

        .timeline {
            position: relative;
            max-width: 1000px;
            margin: auto;
        }

        .timeline::before {
            content: "";
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(
                to bottom,
                var(--ocre),
                var(--bleu),
                var(--vert)
            );
            transform: translateX(-50%);
        }

        .timeline-item {
            width: 50%;
            padding: 15px 45px;
            position: relative;
        }

        .timeline-item:nth-child(odd) {
            margin-right: 50%;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            margin-left: 50%;
        }

        .timeline-dot {
            width: 18px;
            height: 18px;
            position: absolute;
            top: 28px;
            background: var(--or);
            border: 4px solid #f0f3f2;
            border-radius: 50%;
            z-index: 3;
        }

        .timeline-item:nth-child(odd) .timeline-dot {
            right: -9px;
        }

        .timeline-item:nth-child(even) .timeline-dot {
            left: -9px;
        }

        .timeline-content {
            background: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(18,38,52,.07);
        }

        .timeline-content .date {
            color: var(--ocre);
            font-weight: bold;
            font-size: .9rem;
            margin-bottom: 8px;
        }

        .timeline-content h3 {
            color: var(--bleu);
            font-size: 1.4rem;
            margin-bottom: 10px;
        }

        /* =========================================================
           GRANDES PÉRIODES
        ========================================================= */

        .history-section:nth-child(even) {
            background: var(--creme);
        }

        .history-grid {
            display: grid;
            grid-template-columns: .85fr 1.15fr;
            gap: 55px;
            align-items: start;
        }

        .history-number {
            font-family: Georgia, serif;
            font-size: clamp(5rem, 12vw, 10rem);
            color: rgba(23,63,95,.08);
            font-weight: bold;
            line-height: .8;
        }

        .history-period {
            color: var(--ocre);
            font-weight: bold;
            letter-spacing: .08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .history-content h2 {
            color: var(--bleu);
            font-size: 2.7rem;
            margin-bottom: 20px;
        }

        .history-content h3 {
            color: var(--vert);
            margin: 28px 0 10px;
            font-size: 1.45rem;
        }

        .history-content ul {
            margin: 15px 0 20px 20px;
        }

        .history-content li {
            margin-bottom: 7px;
        }

        /* =========================================================
           PERSONNAGES
        ========================================================= */

        .people-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .person {
            background: white;
            padding: 28px;
            border-radius: var(--rayon);
            box-shadow: 0 7px 25px rgba(18,38,52,.07);
        }

        .person-date {
            color: var(--ocre);
            font-weight: bold;
            font-size: .82rem;
        }

        .person h3 {
            color: var(--bleu);
            margin: 7px 0 12px;
        }

        /* =========================================================
           GUERRES
        ========================================================= */

        .war {
            background:
                linear-gradient(
                    135deg,
                    #1d2930,
                    #273b45
                );
            color: white;
        }

        .war .section-title {
            color: white;
        }

        .war .section-subtitle {
            color: #cdd8dd;
        }

        .war-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
        }

        .war-card {
            background: rgba(255,255,255,.07);
            border: 1px solid rgba(255,255,255,.12);
            padding: 35px;
            border-radius: var(--rayon);
        }

        .war-card h3 {
            color: #f4ca75;
            font-size: 1.8rem;
            margin-bottom: 15px;
        }

        .war-stat {
            font-family: Georgia, serif;
            font-size: 2.5rem;
            color: white;
            font-weight: bold;
        }

        /* =========================================================
           PATRIMOINE
        ========================================================= */

        .heritage-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .heritage {
            min-height: 190px;
            padding: 25px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            border-radius: 15px;
            color: white;
            overflow: hidden;
            position: relative;

            background:
                linear-gradient(
                    160deg,
                    var(--bleu-clair),
                    var(--bleu-fonce)
                );
        }

        .heritage:nth-child(2) {
            background:
                linear-gradient(
                    160deg,
                    var(--vert-clair),
                    var(--vert)
                );
        }

        .heritage:nth-child(3) {
            background:
                linear-gradient(
                    160deg,
                    var(--ocre),
                    #925f27
                );
        }

        .heritage:nth-child(4) {
            background:
                linear-gradient(
                    160deg,
                    #75624e,
                    #40382f
                );
        }

        .heritage h3 {
            font-size: 1.35rem;
            margin-bottom: 7px;
        }

        .heritage p {
            font-size: .9rem;
            margin: 0;
            color: rgba(255,255,255,.88);
        }

        /* =========================================================
           VILLES
        ========================================================= */

        .cities {
            background: var(--creme);
        }

        .city-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .city {
            background: white;
            padding: 30px;
            border-radius: var(--rayon);
            border-left: 5px solid var(--vert);
        }

        .city h3 {
            color: var(--bleu);
            margin-bottom: 10px;
        }

        /* =========================================================
           INDUSTRIALISATION
        ========================================================= */

        .industry-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .industry-box {
            background: white;
            border-radius: var(--rayon);
            padding: 35px;
            box-shadow: var(--ombre);
        }

        .industry-box h3 {
            color: var(--bleu);
            margin-bottom: 15px;
        }

        .industry-list {
            list-style: none;
        }

        .industry-list li {
            padding: 13px 0;
            border-bottom: 1px solid #eee;
        }

        .industry-list li:last-child {
            border-bottom: none;
        }

        /* =========================================================
           OISE AUJOURD'HUI
        ========================================================= */

        .today {
            background:
                linear-gradient(
                    135deg,
                    #edf3ef,
                    #f8f2e7
                );
        }

        .today-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 25px;
        }

        .today-card {
            background: rgba(255,255,255,.8);
            padding: 30px;
            border-radius: var(--rayon);
            border: 1px solid rgba(0,0,0,.05);
        }

        .today-card h3 {
            color: var(--bleu);
            margin-bottom: 12px;
        }

        /* =========================================================
           CARTE SYMBOLIQUE
        ========================================================= */

        .map-section {
            background: var(--bleu);
            color: white;
        }

        .map-box {
            min-height: 430px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            border-radius: 25px;

            background:
                radial-gradient(
                    circle at 30% 35%,
                    rgba(217,164,65,.35),
                    transparent 15%
                ),
                radial-gradient(
                    circle at 70% 65%,
                    rgba(143,175,127,.25),
                    transparent 20%
                ),
                #173f5f;
        }

        .map-shape {
            width: min(550px, 75%);
            aspect-ratio: 1.35;
            clip-path: polygon(
                15% 8%,
                38% 0,
                65% 8%,
                88% 20%,
                100% 47%,
                87% 73%,
                68% 91%,
                40% 100%,
                17% 85%,
                3% 58%,
                0 32%
            );

            background:
                linear-gradient(
                    135deg,
                    #8faf7f,
                    #4f7654
                );

            display: grid;
            place-items: center;
            box-shadow: inset 0 0 60px rgba(0,0,0,.15);
        }

        .map-label {
            text-align: center;
            color: white;
            font-family: Georgia, serif;
            text-shadow: 0 2px 8px rgba(0,0,0,.3);
        }

        .map-label strong {
            display: block;
            font-size: 4rem;
        }

        /* =========================================================
           SOURCES
        ========================================================= */

        .sources {
            background: white;
        }

        .sources-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .source {
            padding: 20px;
            border: 1px solid #e2e5e5;
            border-radius: 12px;
            background: #fafafa;
        }

        .source strong {
            display: block;
            color: var(--bleu);
            margin-bottom: 5px;
        }

        /* =========================================================
           FOOTER
        ========================================================= */

        footer {
            background: #0c2538;
            color: #c9d4db;
            padding: 55px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.3fr .7fr .7fr;
            gap: 50px;
        }

        footer h3 {
            color: white;
            margin-bottom: 15px;
        }

        footer ul {
            list-style: none;
        }

        footer li {
            margin-bottom: 7px;
        }

        .copyright {
            margin-top: 40px;
            padding-top: 25px;
            border-top: 1px solid rgba(255,255,255,.1);
            font-size: .85rem;
        }

        /* =========================================================
           BOUTON RETOUR HAUT
        ========================================================= */

        .top-button {
            position: fixed;
            bottom: 22px;
            right: 22px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: grid;
            place-items: center;
            background: var(--ocre);
            color: white;
            font-size: 1.2rem;
            box-shadow: var(--ombre);
            z-index: 500;
        }

        /* =========================================================
           RESPONSIVE TABLETTE
        ========================================================= */

        @media (max-width: 950px) {

            .nav {
                padding: 10px 0;
                align-items: flex-start;
                flex-direction: column;
            }

            .nav-links {
                justify-content: flex-start;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stat:nth-child(2) {
                border-right: none;
            }

            .intro-grid,
            .history-grid,
            .industry-grid,
            .today-grid {
                grid-template-columns: 1fr;
            }

            .periods {
                grid-template-columns: repeat(2, 1fr);
            }

            .people-grid,
            .city-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .heritage-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* =========================================================
           RESPONSIVE MOBILE
        ========================================================= */

        @media (max-width: 650px) {

            header {
                position: relative;
            }

            .nav-links {
                display: none;
            }

            .hero {
                min-height: 650px;
            }

            .hero-content {
                padding-top: 80px;
            }

            section {
                padding: 70px 0;
            }

            .stats {
                margin-top: -35px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }

            .stat {
                padding: 20px 10px;
                border-bottom: 1px solid #eee;
            }

            .stat strong {
                font-size: 1.5rem;
            }

            .periods,
            .people-grid,
            .city-grid,
            .heritage-grid,
            .war-grid,
            .sources-list {
                grid-template-columns: 1fr;
            }

            .timeline::before {
                left: 10px;
            }

            .timeline-item,
            .timeline-item:nth-child(odd),
            .timeline-item:nth-child(even) {
                width: 100%;
                margin: 0;
                padding: 15px 10px 15px 40px;
                text-align: left;
            }

            .timeline-item:nth-child(odd) .timeline-dot,
            .timeline-item:nth-child(even) .timeline-dot {
                left: 1px;
                right: auto;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .history-number {
                font-size: 5rem;
            }

            .map-shape {
                width: 90%;
            }

            .map-label strong {
                font-size: 2.8rem;
            }
        }

        /* =========================================================
           IMPRESSION
        ========================================================= */

        @media print {

            header,
            .hero-buttons,
            .top-button {
                display: none;
            }

            .hero {
                min-height: auto;
                background: white;
                color: black;
            }

            .hero h1,
            .section-title,
            .history-content h2 {
                color: black;
            }

            section {
                padding: 35px 0;
            }

            .timeline::before {
                background: black;
            }

            .war {
                background: white;
                color: black;
            }

            .war .section-title {
                color: black;
            }
        }