/* ORVION — Site vitrine multi-pages
   Style sobre / corporate / responsive
   ============================================ */

:root {
    --color-primary: #0a2540;
    --color-primary-soft: #1c3d63;
    --color-accent: #c8a96a;
    --color-text: #1a1a1a;
    --color-muted: #5b6471;
    --color-bg: #ffffff;
    --color-bg-soft: #f6f7f9;
    --color-bg-dark: #0a2540;
    --color-border: #e6e8ec;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-serif: Georgia, "Times New Roman", serif;

    --radius: 6px;
    --shadow: 0 2px 12px rgba(10, 37, 64, 0.06);

    --container: 1180px;
    --container-narrow: 820px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover { color: var(--color-accent); }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 24px;
}

/* HEADER */
.site-header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--color-primary);
}

.main-nav {
    display: flex;
    gap: 28px;
    align-items: center;
}

.main-nav a {
    color: var(--color-text);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.3px;
    position: relative;
    padding: 4px 0;
}

.main-nav a.active {
    color: var(--color-primary);
}

.main-nav a.active::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
}

.main-nav .nav-cta {
    background: var(--color-primary);
    color: #fff;
    padding: 10px 20px;
    border-radius: var(--radius);
}

.main-nav .nav-cta:hover {
    background: var(--color-primary-soft);
    color: #fff;
}

/* HERO (page d'accueil) */
.hero {
    padding: 100px 0 80px;
    background: linear-gradient(180deg, #f6f7f9 0%, #ffffff 100%);
    text-align: center;
}

/* PAGE HEADER (autres pages) */
.page-header {
    padding: 80px 0 60px;
    background: linear-gradient(180deg, #f6f7f9 0%, #ffffff 100%);
    border-bottom: 1px solid var(--color-border);
}

.page-header .lead {
    max-width: 720px;
    margin: 24px 0 0;
}

.eyebrow {
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 16px;
}

.eyebrow-light { color: #d4b884; }

h1 {
    font-family: var(--font-serif);
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.15;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 24px;
    max-width: 900px;
}

.hero h1 { margin-left: auto; margin-right: auto; }

.lead {
    font-size: 18px;
    color: var(--color-muted);
    max-width: 720px;
    margin: 0 auto 36px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 15px;
    letter-spacing: 0.3px;
    transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-primary-soft);
    color: #fff;
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: #fff;
}

.btn-light {
    background: #fff;
    color: var(--color-primary);
}

.btn-light:hover {
    background: var(--color-accent);
    color: #fff;
}

/* SECTIONS */
.section { padding: 96px 0; }

.section-alt { background: var(--color-bg-soft); }

.section-dark {
    background: var(--color-bg-dark);
    color: #fff;
}

.section-dark h2 { color: #fff; }
.section-dark p { color: rgba(255, 255, 255, 0.78); }

h2 {
    font-family: var(--font-serif);
    font-size: clamp(28px, 3.5vw, 40px);
    color: var(--color-primary);
    line-height: 1.2;
    font-weight: 600;
    margin-bottom: 32px;
    max-width: 800px;
}

h3 {
    font-family: var(--font-serif);
    font-size: 22px;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 12px;
}

h4 {
    font-size: 14px;
    color: var(--color-primary);
    font-weight: 600;
    margin: 24px 0 12px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.section-intro {
    font-size: 17px;
    color: var(--color-muted);
    max-width: 800px;
    margin-bottom: 56px;
}

.section-cta {
    margin-top: 48px;
    text-align: center;
}

/* TWO COL */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 64px;
    align-items: start;
}

.two-col-text p {
    color: var(--color-muted);
    margin-bottom: 16px;
    font-size: 16px;
}

/* EXPERTISE */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.expertise-grid-compact {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.expertise-card {
    background: #fff;
    padding: 36px 32px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.expertise-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--color-accent);
}

.expertise-card p {
    color: var(--color-muted);
    font-size: 15px;
    margin-bottom: 12px;
}

.expertise-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 18px;
    color: var(--color-accent);
}

.expertise-icon svg {
    width: 100%;
    height: 100%;
}

.expertise-list {
    list-style: none;
    margin-top: 16px;
    padding-left: 0;
}

.expertise-list li {
    padding: 6px 0 6px 18px;
    position: relative;
    color: var(--color-text);
    font-size: 14px;
    border-bottom: 1px solid var(--color-border);
}

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

.expertise-list li::before {
    content: "›";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* SECTEURS - vue détaillée */
.sector-detail {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.sector-block {
    background: #fff;
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent);
}

.sector-block p {
    color: var(--color-muted);
    font-size: 15px;
    margin-bottom: 0;
}

/* MÉTHODE - vue détaillée */
.method-detail {
    display: flex;
    flex-direction: column;
    gap: 56px;
}

.method-step {
    background: #fff;
    padding: 40px 36px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
}

.method-step .step-number {
    display: inline-block;
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.method-step h2 {
    font-size: 28px;
    margin-bottom: 16px;
}

.method-step p {
    color: var(--color-muted);
    margin-bottom: 16px;
}

/* STEPS / méthode - vue compacte (page d'accueil) */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.step {
    background: #fff;
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.step-number {
    display: inline-block;
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.step p {
    color: var(--color-muted);
    font-size: 15px;
}

/* PRINCIPES */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.principle {
    padding: 28px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.principle p {
    color: var(--color-muted);
    font-size: 15px;
}

/* ENGAGEMENTS */
.engagements {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.engagement {
    background: #fff;
    padding: 36px 36px 32px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent);
}

.engagement h2 {
    font-size: 24px;
    margin-bottom: 16px;
    max-width: none;
}

.engagement h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.engagement p {
    color: var(--color-muted);
    font-size: 16px;
    margin-bottom: 14px;
}

.engagement p:last-child { margin-bottom: 0; }

/* FAQ */
.faq {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.faq-item[open] {
    border-color: var(--color-accent);
}

.faq-item summary {
    padding: 22px 28px;
    cursor: pointer;
    font-weight: 500;
    color: var(--color-primary);
    font-size: 16px;
    list-style: none;
    position: relative;
    padding-right: 56px;
    user-select: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: "+";
    position: absolute;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    font-weight: 300;
    color: var(--color-accent);
    transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-item p {
    padding: 0 28px 24px;
    color: var(--color-muted);
    font-size: 15px;
}

/* CTA BLOCK (sections finales sombres) */
.cta-block {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}

.cta-block h2 {
    color: #fff;
    margin: 0 auto 16px;
}

.cta-block p {
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 28px;
    font-size: 17px;
}

/* CONTACT PAGE */
.contact-page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 56px;
}

.contact-card {
    background: #fff;
    padding: 36px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.contact-card h2 {
    font-size: 26px;
    margin-bottom: 16px;
    max-width: none;
}

.contact-card p {
    color: var(--color-muted);
    margin-bottom: 16px;
    font-size: 15px;
}

.contact-email {
    display: inline-block;
    font-size: 22px;
    font-family: var(--font-serif);
    color: var(--color-primary);
    margin: 8px 0 16px;
    word-break: break-all;
}

.contact-note {
    font-size: 14px !important;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

/* CONTACT BLOCK (homepage / contact section) */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.contact-block {
    border-left: 2px solid var(--color-accent);
    padding-left: 16px;
}

.contact-label {
    display: block;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--color-accent);
    margin-bottom: 8px;
    font-weight: 600;
}

.contact-block a,
.contact-block p {
    color: #fff;
    font-size: 15px;
}

.contact-block a:hover { color: var(--color-accent); }

/* LEGAL CARD (contact page) */
.legal-card {
    background: var(--color-bg-soft);
    padding: 48px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.legal-card h2 {
    font-size: 26px;
    margin-bottom: 28px;
}

.legal-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.legal-grid .contact-label {
    color: var(--color-muted);
}

.legal-grid p,
.legal-grid a {
    color: var(--color-text);
    font-size: 15px;
}

/* LEGAL PAGES */
.legal-page h2 {
    font-size: 24px;
    margin-top: 40px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.legal-page h2:first-of-type {
    margin-top: 0;
    border-top: 0;
    padding-top: 0;
}

.legal-page p {
    color: var(--color-muted);
    margin-bottom: 16px;
    font-size: 16px;
}

.legal-page a {
    color: var(--color-primary);
    text-decoration: underline;
}

.legal-list {
    list-style: none;
    padding-left: 0;
    margin-bottom: 16px;
}

.legal-list li {
    padding: 8px 0 8px 20px;
    position: relative;
    color: var(--color-muted);
    font-size: 16px;
    border-bottom: 1px solid var(--color-border);
}

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

.legal-list li::before {
    content: "›";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.legal-list li strong {
    color: var(--color-text);
    margin-right: 8px;
}

.legal-update {
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 14px;
    font-style: italic;
}

/* FOOTER */
.site-footer {
    background: #061a2f;
    color: rgba(255, 255, 255, 0.7);
    padding: 56px 0 32px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1.5fr;
    gap: 40px;
    align-items: start;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 24px;
}

.site-footer .logo {
    color: #fff;
    display: block;
    margin-bottom: 8px;
}

.footer-tagline {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 16px;
}

.footer-legal-info {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-legal {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

/* RESPONSIVE — Tablette */
@media (max-width: 980px) {
    .main-nav { gap: 20px; }
    .main-nav a:not(.nav-cta) {
        font-size: 13px;
    }
    .expertise-grid,
    .expertise-grid-compact {
        grid-template-columns: 1fr;
    }
    .sector-detail {
        grid-template-columns: 1fr;
    }
    .steps {
        grid-template-columns: 1fr;
    }
    .principles-grid {
        grid-template-columns: 1fr;
    }
    .two-col,
    .contact-grid,
    .contact-page-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .legal-grid {
        grid-template-columns: 1fr;
    }
    .footer-inner {
        grid-template-columns: 1fr;
    }
}

/* RESPONSIVE — Mobile */
@media (max-width: 700px) {
    .main-nav {
        display: none;
    }
    .hero {
        padding: 64px 0 48px;
    }
    .page-header {
        padding: 56px 0 36px;
    }
    .section {
        padding: 64px 0;
    }
    h2 {
        margin-bottom: 24px;
    }
    .hero-cta {
        flex-direction: column;
    }
    .btn {
        width: 100%;
        text-align: center;
    }
    .legal-card {
        padding: 28px 24px;
    }
    .method-step {
        padding: 28px 24px;
    }
    .engagement {
        padding: 28px 24px;
    }
}