/* ===============================
   Insyte Additive - Styles de la page d'accueil
   (Polices mises à jour : Kanit pour titres, Roboto Bold pour texte courant)
================================== */

/* === VARIABLES GLOBALES === */
:root {
    --color-primary: #ffffff;    /* Couleur principale (fond général léger) */
    --color-secondary: #f2f2f2;  /* Couleur secondaire (fonds de section) */
    --color-tertiary: #0d0d0d;   /* Couleur tertiaire (header, footer, éléments sombres) */
    --color-tertiary-rgb: 13, 13, 13; /* RGB pour overlays */
    --color-tertiary-light: #2e3438; /* Version plus claire du tertiaire pour bordures */
    --color-detail: #0540f2;     /* Couleur de détail (accents, liens actifs, CTA) */
    --color-detail-rgb: 5, 64, 242; /* RGB pour ombres et alphas */
    --color-detail-darker: #1750fd; 
    --color-text: #000000;       /* Couleur du texte principal */
    --color-text-light: #ffffff; /* Couleur du texte sur fonds sombres */
    --color-text-subtle: #555555;/* Couleur de texte plus discrète */

    /* Polices personnalisées */
    /* --font-family-heading: 'Kanit', 'Poppins', sans-serif; Titres */
    /* --font-family-base: 'Roboto', 'Poppins', sans-serif;   Texte courant */
    --font-family-base:  'Roboto', 'Poppins', sans-serif;   /* Texte courant */
    --font-family-heading: 'Poppins', sans-serif; /* Titres */
    --font-weight-heading: 600;           /* Semi-gras (semi bold) */
    --font-weight-heading-strong: 700;    /* Gras */
    --font-weight-text: 700;              /* Roboto Bold demandé */

    --spacing-unit: 1rem;        /* Unité d'espacement par défaut */
    --transition-speed: 0.3s;
    --transition-speed-fast: 0.2s; 
    --border-radius-base: 8px;
    --border-radius-small: 6px; 
    --shadow-light: 0 4px 15px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.1);
    --shadow-dropdown: 0 8px 20px rgba(0, 0, 0, 0.1); 

    /* Alias composants */
    --accent-color: var(--color-detail);
    --accent-color-rgb: 11, 64, 224;
    --text-on-accent: var(--color-text-light);
    --text-on-light: #171a1c;
    --body-bg: #ffffff;
    --content-block-bg: var(--color-secondary);
    --color-border-light: #e6ecf1;

    --footer-subheading-gap: calc(1.3rem + var(--spacing-unit));
    --page-title-min: 2.6rem;
    --page-title-fluid: 6vw;
    --page-title-max: 4rem;
}

.page-content { min-height: calc(100vh - 120px); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius-base);
    transition: all var(--transition-speed) ease;
    cursor: pointer;
}

.btn--primary { background-color: var(--color-detail); color: var(--color-text-light); border: 2px solid var(--color-detail); }
.btn--primary:hover { background-color: transparent; color: var(--color-detail); }

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-family-base);
    font-weight: var(--font-weight-text); /* Roboto Bold */
    color: var(--color-text);
    background-color: var(--color-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Images fluides par défaut */
img { max-width: 100%; height: auto; }

/* Titres de page (hero) */
.page-top-title {
    font-size: clamp(var(--page-title-min), var(--page-title-fluid), var(--page-title-max)) !important;
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-heading-strong);
    color: #ffffff;
    margin: 0;
    line-height: 1.15;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

/* Container global */
.container { width: 90%; max-width: 1500px; margin: 0 auto; }

/* Header */
header {
    width: 100%;
    background: var(--color-tertiary);
    color: var(--color-text-light);
    padding: 15px 0;
    position: sticky; top: 0; z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    height: 11vh;
}
.header-container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.header-container, .main-nav > ul { white-space: nowrap; }
.logo { display: inline-flex; align-items: center; }
.logo img { max-height: 45px; transition: max-height var(--transition-speed) ease; }

/* Navigation principale */
.main-nav ul { list-style: none; display: flex; align-items: center; gap: 5px; flex-wrap: nowrap; }
.main-nav ul li, .main-nav ul li a { white-space: nowrap; }
.main-nav ul li { position: relative; height: 50px; font-size: 1.05rem; }
.main-nav ul li a {
    color: var(--color-secondary);
    text-decoration: none;
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-heading);
    padding: 10px 15px;
    display: block; position: relative; transition: color var(--transition-speed) ease;
}
.main-nav ul li a:not(.bordered):not(.dropdown-toggle)::after { content: ''; position: absolute; bottom: 5px; left: 15px; right: 15px; height: 2px; background-color: var(--color-detail); transform: scaleX(0); transform-origin: center; transition: transform var(--transition-speed) ease-out; }
.main-nav ul li a:not(.bordered):not(.dropdown-toggle):hover::after,
.main-nav ul li a:not(.bordered):not(.dropdown-toggle):focus::after { transform: scaleX(1); }
.main-nav ul li a:hover, .main-nav ul li a:focus { color: var(--color-text-light); }
.main-nav ul li a.bordered { font-weight: var(--font-weight-heading-strong); border: 4px solid var(--color-detail); border-radius: var(--border-radius-base); background-color: transparent; padding: 8px 15px 6px; transition: color var(--transition-speed) ease, padding var(--transition-speed) ease, margin var(--transition-speed) ease, border-color var(--transition-speed) ease; }
.main-nav ul li a.bordered::after { content: ''; position: absolute; left: 15px; right: 15px; bottom: 4px; height: 2px; background-color: var(--color-detail); transform: scaleX(0); transform-origin: center; transition: transform var(--transition-speed) ease-out 0.1s; }
.main-nav ul li a.bordered:hover, .main-nav ul li a.bordered:focus { color: var(--color-text-light); padding-bottom: 10px; border-color: var(--color-detail); }
.main-nav ul li a.bordered:hover::after, .main-nav ul li a.bordered:focus::after { transform: scaleX(1); }

.main-nav ul li.dropdown > a { padding-right: 35px; }
.main-nav ul li.dropdown > a::after { content: ''; position: absolute; bottom: 5px; left: 15px; right: 30px; height: 2px; background-color: var(--color-detail); transform: scaleX(0); transform-origin: center; transition: transform var(--transition-speed) ease-out; }
.main-nav ul li.dropdown > a:hover::after, .main-nav ul li.dropdown > a:focus::after { transform: scaleX(1); }
.main-nav ul li.dropdown { position: static; }
.main-nav ul li.dropdown > a::before { content: ""; position: absolute; right: 15px; top: 50%; width: 0; height: 0; border-top: 5px solid transparent; border-bottom: 5px solid transparent; border-left: 6px solid var(--color-secondary); transform: translateY(-50%) rotate(0deg); transition: transform var(--transition-speed-fast) ease-out, border-left-color var(--transition-speed-fast) ease-out; }
.main-nav ul li.dropdown:hover > a::before, .main-nav ul li.dropdown:focus-within > a::before { transform: translateY(-50%) rotate(90deg); border-left-color: var(--color-text-light); }

/* Mega menu */
.dropdown .dropdown-menu { display: block; position: absolute; background-color: rgba(255, 255, 255, 1); top: 100%; left: 5%; width: 90%; padding: 2rem 0 1rem; border-top: 2px solid var(--color-tertiary-light); box-shadow: 0px 4px 11px 6px rgba(0,0,0,0.5); opacity: 0; visibility: hidden; transform: translateY(20px); transform-origin: top center; transition: all var(--transition-speed) cubic-bezier(0.4,0,0.2,1); border-radius: var(--border-radius-base); }
.dropdown:hover .dropdown-menu, .dropdown:focus-within .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(10px); transition: opacity var(--transition-speed) cubic-bezier(0.4,0,0.2,1), transform var(--transition-speed) cubic-bezier(0.4,0,0.2,1), visibility 0s, padding var(--transition-speed) cubic-bezier(0.4,0,0.2,1); }
.dropdown-menu__content { display: grid; grid-template-columns: 2fr 2fr 3fr; gap: 2.5rem; }
.dropdown .column-description { width: 80%; color: var(--color-tertiary); font-size: 0.85rem; font-style: italic; opacity: 0; transform: translateY(10px); transition: all 1s cubic-bezier(.14,1.01,.71,.95); background-color: rgba(0,0,0,0); max-height: 0; overflow: hidden; margin: 0; }
.dropdown .column-description.visible { opacity: 1; transform: translateY(0); max-height: 100px; }
.dropdown .dropdown-column { display: flex; flex-direction: column; position: relative; transition: all var(--transition-speed) cubic-bezier(0.4,0,0.2,1); }
.dropdown .dropdown-column:not(:last-child) { border-right: none; padding-right: 0; }
.dropdown .dropdown-section + .dropdown-section { margin-top: 1.5rem; }
.dropdown .dropdown-header { font-size: 1.1rem; font-family: var(--font-family-heading); font-weight: var(--font-weight-heading-strong); color: var(--color-detail); margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--color-tertiary-light); white-space: nowrap; text-transform: uppercase; letter-spacing: 0.5px; }
.dropdown .dropdown-header--link { text-decoration: none; transition: color var(--transition-speed-fast) ease; padding: 0; margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--color-tertiary-light); display: block; }
.dropdown .dropdown-header--link:hover { color: var(--color-detail); }
.dropdown .dropdown-soon { font-size: 0.9em; color: var(--color-text-subtle); font-style: italic; padding: 10px 0 0; line-height: 1.5; }
.dropdown .dropdown-column ul { list-style: none; padding: 0; margin: 0; }
.dropdown .dropdown-column ul li { position: relative; margin-bottom: 0; }
.dropdown .dropdown-column ul li a { padding: 0.5rem 1rem; color: var(--color-tertiary); font-weight: 400; font-size: 0.9rem; font-style: italic; display: block; border-radius: var(--border-radius-small); transition: all var(--transition-speed-fast) ease-out; background-color: rgba(0, 0, 0, 0.05); border: 1px solid transparent; }
.dropdown .dropdown-column ul li a:hover, .dropdown .dropdown-column ul li a:focus { color: var(--color-detail); background-color: rgba(255,255,255,0.1); border-color: var(--color-tertiary-light); transform: translateY(-2px); }

/* Menu mobile */
.nav-toggle { display: none; }
.nav-toggle-label { display: none; font-size: 1.8em; color: var(--color-text-light); cursor: pointer; width: 30px; height: 22px; position: relative; flex-direction: column; justify-content: space-between; }
.nav-toggle-label span, .nav-toggle-label span::before, .nav-toggle-label span::after { content: ''; display: block; height: 3px; width: 100%; background-color: var(--color-text-light); border-radius: 3px; transition: all var(--transition-speed) ease-in-out; }
.nav-toggle-label span::before { position: absolute; top: -8px; }
.nav-toggle-label span::after { position: absolute; top: 8px; }
.nav-toggle:checked ~ .nav-toggle-label span { background-color: transparent; }
.nav-toggle:checked ~ .nav-toggle-label span::before { transform: rotate(45deg) translate(5px, 6px); }
.nav-toggle:checked ~ .nav-toggle-label span::after { transform: rotate(-45deg) translate(5px, -6px); }

/* Navigation mobile (breakpoint étendu pour éviter tout retour à la ligne) */
@media (max-width: 1200px) {
    .header-container { align-items: center; }
    .logo img { max-height: 40px; }
    .nav-toggle { display: block; position: absolute; left: -9999px; }
    .nav-toggle-label { display: flex; margin-left: auto; }

    .main-nav { position: absolute; top: 100%; left: 0; right: 0; background: var(--color-tertiary); display: none; padding: 0.5rem 0; box-shadow: 0 8px 24px rgba(0,0,0,0.2); max-height: 85vh; overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; }
    .nav-toggle:checked ~ .main-nav { display: block; }

    .main-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
    /* Flèche du dropdown en état ouvert (mobile) */
    .main-nav ul li.dropdown > a[aria-expanded="true"]::before {
    transform: translateY(-50%) rotate(90deg);
        border-left-color: var(--color-text-light);
    }
    /* Flèche du dropdown en état fermé (mobile) */
    .main-nav ul li.dropdown > a[aria-expanded="false"]::before,
    .main-nav ul li.dropdown > a:not([aria-expanded])::before {
        transform: translateY(-50%) rotate(0deg);
        border-left-color: var(--color-secondary);
    }
    .main-nav ul li { height: auto; }
    .main-nav ul li a { padding: 12px 20px; border-radius: 0; white-space: normal; }
    .main-nav ul li a.bordered { margin: 6px 12px; text-align: center; }

    /* Mega-menu en mode empilé (caché par défaut) */
    .dropdown .dropdown-menu { position: static; width: 100%; border: 0; box-shadow: none; background: transparent; display: none; opacity: 0; visibility: hidden; transform: none; height: 0; padding: 0; }
    /* Affichage lorsque le lien déclencheur est développé */
    .dropdown > a[aria-expanded="true"] + .dropdown-menu { display: block; opacity: 1; visibility: visible; height: auto; padding: 0.5rem 0 0.75rem; }
    .dropdown .dropdown-menu > .container { width: 100%; }
    .dropdown-menu__content { display: grid; grid-template-columns: 1fr; gap: 0.5rem; padding: 0 8px; }
    .dropdown .dropdown-header { color: var(--color-secondary); border-bottom-color: rgba(255,255,255,0.2); margin: 8px 8px 4px; }
    .dropdown .dropdown-column ul li a { background: transparent; border: 0; color: var(--color-secondary); padding: 8px 16px; }
    .dropdown .column-description { display: none; }
}

/* Footer */
.site-footer { background-color: var(--content-block-bg); color: var(--text-on-light); padding-top: calc(var(--spacing-unit) * 2); padding-bottom: calc(var(--spacing-unit) * 2); margin-top: auto; font-size: 0.9rem; background-color: var(--color-secondary); }
.site-footer__content { display: flex; flex-wrap: wrap; justify-content: space-between; gap: calc(var(--spacing-unit) * 2); margin-bottom: calc(var(--spacing-unit) * 2); }
.site-footer__links, .site-footer__legal, .site-footer__contact, .site-footer__social { flex: 1 1 200px; }

@media (min-width: 768px) {
  .site-footer__content { display: grid; grid-template-columns: auto max-content max-content max-content; align-items: start; justify-content: center; column-gap: 2rem; row-gap: 1.25rem; }
  .site-footer__links, .site-footer__legal, .site-footer__contact, .site-footer__social { width: auto; max-width: none; }
}

.footer-services-columns { display: grid; gap: 2rem; grid-template-columns: 1fr; }
@media (min-width: 600px) { .footer-services-columns { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 2rem; } .footer-services-column { flex: 0 0 auto; max-width: 100%; } }

.footer-subheading { font-size: 1rem; font-family: var(--font-family-heading); font-weight: var(--font-weight-heading); line-height: 1.3; margin-top: calc(var(--spacing-unit) * 0.5); margin-bottom: calc(var(--spacing-unit) * 0.5); color: var(--color-text); }
.site-footer__content p { font-style: italic; line-height: 1.3; }
.site-footer.footer-heading { font-size: 1.1rem; font-family: var(--font-family-heading); font-weight: var(--font-weight-heading-strong); margin-bottom: var(--spacing-unit); color: var(--detail-color-dark); }

.site-footer__legal .footer-heading, .site-footer__contact .footer-heading, .site-footer__social .footer-heading { margin-bottom: 0; }
.site-footer__links .footer-heading + ul, .site-footer__legal .footer-heading + ul, .site-footer__contact .footer-heading + ul, .site-footer__social .footer-heading + ul { margin-top: var(--footer-subheading-gap); }

.site-footer ul { list-style: none; padding-left: 0; }
.site-footer ul li a { color: var(--text-on-light); text-decoration: none; }
.site-footer ul li a:hover { color: var(--accent-color); text-decoration: underline; }
.site-footer__copyright { text-align: center; padding-top: var(--spacing-unit); border-top: 1px solid #d1d9e0; }
.social-links { display: flex; gap: var(--spacing-unit); }
.social-links li { margin-bottom: 0; }
.social-links svg { width: 24px; height: 24px; fill: var(--color-text); }
.social-links a:hover svg { fill: var(--accent-color); }

@media (min-width: 1024px) {
  :root { --spacing-unit: 1.125rem; }
  h1 { font-size: 3.5rem; }
  .site-footer__content { justify-content: center; column-gap: 3rem; row-gap: 1.25rem; }
  .site-footer__links, .site-footer__legal, .site-footer__contact, .site-footer__social { max-width: none; }
}

.main-nav ul li.dropdown:hover > a, .main-nav ul li.dropdown:focus-within > a { color: var(--color-text-light); }
.main-nav ul li.dropdown:hover > a:not(.bordered):not(.dropdown-toggle)::after,
.main-nav ul li.dropdown:focus-within > a:not(.bordered):not(.dropdown-toggle)::after { transform: scaleX(1); }

.footer-separator { opacity: 0.3; border: none; width: 60%; height: 1px; background-color: var(--color-tertiary-light); margin: 0.25rem 0; }

/* Sections utilitaires */
.section-padding { padding-top: 50px; padding-bottom: 50px; }
@media (min-width: 992px) { .section-padding { padding-top: 50px; padding-bottom: 50px; } }

.section-title { font-size: clamp(2rem, 5vw, 2.8rem); font-family: var(--font-family-heading); font-weight: var(--font-weight-heading-strong); text-align: center; margin-bottom: calc(var(--spacing-unit) * 0.75); color: var(--detail-color-dark); line-height: 1.25; }
.section-title .highlight { color: var(--accent-color); }
.section-subtitle { font-size: clamp(1rem, 2.5vw, 1.15rem); color: var(--text-on-light); opacity: 0.8; text-align: center; max-width: 750px; margin-left: auto; margin-right: auto; margin-bottom: calc(var(--spacing-unit) * 3); line-height: 1.7; }

/* Boutons */
.btn--large { padding: calc(var(--spacing-unit) * 0.95) calc(var(--spacing-unit) * 2.3); font-size: 1.05rem; letter-spacing: 0.04em; }
.btn--secondary { background-color: var(--content-block-bg); color: var(--accent-color); border: 1px solid var(--color-border-light); box-shadow: none; }
.btn--secondary:hover { background-color: var(--accent-color); color: var(--text-on-accent); border-color: var(--accent-color); }
.btn--outline-light { background-color: rgba(0, 0, 0, 0.15); color: #ffffff; font-weight: 600; box-shadow: none; }
.btn--outline-light:hover { color: #ffffff; background-color: rgba(255,255,255,0.1); box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.btn .btn__icon { display: inline-flex; width: 1.1em; height: 1.1em; margin-left: .6rem; transition: transform var(--transition-speed) ease; }
.btn.btn--with-icon:hover .btn__icon { transform: translateX(4px); }
.btn:hover { transform: translateY(-3px); }
.btn:focus-visible { outline: 2px solid var(--color-detail); outline-offset: 2px; box-shadow: 0 0 0 4px rgba(11,64,224,.15); }
.btn:active { transform: translateY(-1px); }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .6; cursor: not-allowed; pointer-events: none; transform: none; }
@media (prefers-reduced-motion: reduce) { .btn, .btn * { transition: none !important; } .btn:hover, .btn:active { transform: none !important; } }
.dropdown-cta__button { display: inline-block; padding: calc(var(--spacing-unit) * 0.7) calc(var(--spacing-unit) * 1.6); border-radius: var(--border-radius-base); background-color: var(--content-block-bg); color: var(--accent-color); border: 1px solid var(--color-border-light); text-decoration: none; font-weight: 600; transition: all var(--transition-speed) ease; }
.dropdown-cta__button:hover { background-color: var(--accent-color); color: var(--text-on-accent); border-color: var(--accent-color); }

.text-center { text-align: center; }

/* Titres génériques (sécurité si d'autres fichiers CSS) */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-family-heading); font-weight: var(--font-weight-heading); line-height: 1.2; }
h1, h2 { font-weight: var(--font-weight-heading-strong); }

/* Typo texte courant pour éléments inline/blocs fréquents */
p, li, span, a, small, button, input, textarea, label { font-family: var(--font-family-base); font-weight: var(--font-weight-text); }