/* ==========================================================================
   EXETYS — feuille de style
   Palette charte EXETYS : vert #0a492b principal, bleu nuit #0d293d,
   orange #f6a72b (chaleur), brique #ae411b (accent chaud)
   Typo : Inter (titres + courant), pesages differencies
   ========================================================================== */

:root {
    --blue-900: #052416;   /* vert tres fonce (derive) */
    --blue-800: #073a22;   /* vert fonce */
    --blue-700: #0a492b;   /* vert principal charte */
    --blue-500: #0d293d;   /* bleu nuit charte (secondaire) */
    --blue-100: #e3efe7;   /* vert tres clair */
    --blue-050: #f4faf6;

    --copper-700: #8a3414;
    --copper-600: #ae411b;   /* brique charte */
    --copper-500: #f6a72b;   /* orange charte (chaleur) */
    --copper-300: #fbd79a;
    --copper-050: #fef5e5;

    --ink-900: #0d293d;      /* bleu nuit charte comme encre */
    --ink-700: #2a3a44;
    --ink-500: #57697a;
    --ink-300: #9aa9b4;
    --line: #dee7ec;
    --paper: #ffffff;
    --paper-soft: #f7fafc;

    --radius: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 1px 2px rgba(5, 36, 22, 0.06), 0 2px 8px rgba(5, 36, 22, 0.04);
    --shadow-md: 0 6px 24px rgba(5, 36, 22, 0.10);
    --shadow-lg: 0 24px 60px rgba(5, 36, 22, 0.14);

    --max: 1200px;
    --gap: clamp(1rem, 2.5vw, 2rem);
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) {
    html { scroll-behavior: smooth; }
}

body {
    font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.65;
    color: var(--ink-900);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.015em;
    color: var(--blue-900);
}
h1 { font-size: clamp(2.1rem, 4.6vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; letter-spacing: 0.02em; text-transform: uppercase; color: var(--ink-700); font-family: 'Inter', sans-serif; font-weight: 600; }

p { color: var(--ink-700); }
p + p { margin-top: 0.75rem; }

a { color: var(--blue-700); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--copper-600); }

img, video { max-width: 100%; height: auto; display: block; }

.container {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 1.75rem);
}

/* SKIP LINK */
.skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px; height: 1px;
    overflow: hidden;
}
.skip-link:focus {
    position: fixed;
    top: 1rem; left: 1rem;
    width: auto; height: auto;
    padding: .75rem 1.25rem;
    background: var(--blue-900);
    color: #fff;
    border-radius: 8px;
    z-index: 10000;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
    position: sticky; top: 0;
    background: rgba(255,255,255,0.92);
    backdrop-filter: saturate(1.4) blur(10px);
    -webkit-backdrop-filter: saturate(1.4) blur(10px);
    border-bottom: 1px solid var(--line);
    z-index: 100;
}
.site-header__inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: .4rem 1rem;
    padding-left: clamp(.75rem, 2vw, 1.25rem);
    padding-right: clamp(.75rem, 2vw, 1.25rem);
}
.site-logo {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    font-family: 'Inter', system-ui, sans-serif;
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: 0.02em;
    color: var(--blue-900);
}
.site-logo img { height: 64px; width: auto; object-fit: contain; display: block; }
@media (max-width: 820px) {
    .site-logo img { height: 48px; }
}
.site-logo:hover { color: var(--copper-600); }

.site-nav { margin-left: auto; }
.site-nav ul {
    display: flex; gap: 1.6rem;
    list-style: none;
    align-items: center;
}
.site-nav a {
    color: var(--ink-700);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.35rem 0;
    position: relative;
}
.site-nav a::after {
    content: "";
    position: absolute; left: 0; right: 100%;
    bottom: -4px;
    height: 2px;
    background: var(--copper-500);
    transition: right .25s ease;
}
.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after { right: 0; }
.site-nav a[aria-current="page"] { color: var(--blue-900); font-weight: 600; }

.site-header__cta { flex-shrink: 0; }

.nav-toggle {
    display: none;
    background: transparent; border: 0;
    width: 42px; height: 42px;
    margin-left: auto;
    cursor: pointer;
    flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav-toggle span {
    display: block; width: 22px; height: 2px; background: var(--blue-900); border-radius: 2px;
    transition: transform .2s ease;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .95rem 1.6rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1;
    color: #fff;
    background: var(--blue-700);
    border: 1px solid var(--blue-700);
    border-radius: 999px;
    text-decoration: none;
    transition: transform .15s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}
.btn:hover { background: var(--blue-800); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--copper { background: var(--copper-500); border-color: var(--copper-500); }
.btn--copper:hover { background: var(--copper-600); }
.btn--ghost { background: transparent; color: var(--blue-900); border-color: var(--blue-900); box-shadow: none; }
.btn--ghost:hover { background: var(--blue-900); color: #fff; }
.btn--sm { padding: .55rem 1rem; font-size: 0.85rem; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
    position: relative;
    overflow: hidden;
    padding: clamp(4rem, 8vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
    background:
        radial-gradient(1200px 500px at 90% -10%, rgba(246,167,43,0.22), transparent 60%),
        radial-gradient(900px 500px at -10% 110%, rgba(10,73,43,0.24), transparent 55%),
        linear-gradient(180deg, #eaf2e8 0%, #f7fafc 100%);
}
.hero__grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: center;
}
.hero__eyebrow {
    display: inline-flex; align-items: center; gap: .5rem;
    font-size: 0.85rem; font-weight: 600;
    letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--copper-600);
    margin-bottom: 1rem;
}
.hero__eyebrow::before {
    content: ""; display: inline-block; width: 28px; height: 2px; background: var(--copper-500);
}
.hero h1 { margin-bottom: 1.25rem; }
.hero__lead {
    font-size: clamp(1.05rem, 1.35vw, 1.2rem);
    color: var(--ink-700);
    max-width: 42ch;
    margin-bottom: 2rem;
}
.hero__cta { display: flex; gap: .75rem; flex-wrap: wrap; }

.hero__visual {
    position: relative;
    aspect-ratio: 4 / 3.2;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background:
        linear-gradient(135deg, var(--blue-800) 0%, var(--blue-700) 45%, var(--blue-500) 100%);
    box-shadow: var(--shadow-lg);
    display: grid;
    place-items: center;
    color: rgba(255,255,255,0.95);
}
.hero__visual::before {
    content: "";
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(255,255,255,0.15), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(246,167,43,0.35), transparent 40%);
}
.hero__visual-inner {
    position: relative;
    text-align: center;
    padding: 2rem;
}
.hero__visual-inner .badge {
    display: inline-block;
    padding: .35rem .8rem;
    background: rgba(255,255,255,0.14);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 999px;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}
.hero__visual-inner h2 { color: #fff; font-size: 1.5rem; }
.hero__visual-inner p { color: rgba(255,255,255,0.85); margin-top: .5rem; }

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
    padding: clamp(3rem, 6vw, 5rem) 0;
}
.section--soft { background: var(--paper-soft); }
.section--blue { background: var(--blue-050); }

.section__head {
    max-width: 720px;
    margin-bottom: clamp(2rem, 4vw, 3rem);
}
.section__eyebrow {
    display: inline-block;
    font-size: 0.8rem; font-weight: 600;
    letter-spacing: 0.16em; text-transform: uppercase;
    color: var(--copper-600);
    margin-bottom: .75rem;
}
.section__head h2 { margin-bottom: .75rem; }
.section__head p { font-size: 1.05rem; color: var(--ink-700); }

/* ============================================================
   METIER CARDS
   ============================================================ */
.metiers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}
.metier {
    display: flex;
    flex-direction: column;
    padding: 1.75rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.metier:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--copper-300);
}
.metier__icon {
    width: 52px; height: 52px;
    border-radius: 12px;
    background: var(--blue-050);
    color: var(--blue-700);
    display: grid; place-items: center;
    margin-bottom: 1rem;
    font-size: 1.6rem;
}
.metier--warm .metier__icon { background: var(--copper-050); color: var(--copper-600); }
.metier h3 { margin-bottom: .5rem; color: var(--blue-900); }
.metier p { font-size: 0.95rem; }
.metier__link {
    margin-top: 1rem;
    font-weight: 600;
    color: var(--blue-700);
    font-size: 0.92rem;
}
.metier__link::after { content: " →"; }

/* ============================================================
   METHODE (numbered steps)
   ============================================================ */
.methode {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    counter-reset: step;
}
.methode__step {
    position: relative;
    padding: 1.5rem 1.25rem 1.25rem;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--line);
}
.methode__step::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--copper-500);
    display: block;
    line-height: 1;
    margin-bottom: .75rem;
}
.methode__step h3 { font-size: 1.1rem; margin-bottom: .35rem; }
.methode__step p { font-size: 0.93rem; }

/* ============================================================
   REALISATIONS GALLERY (placeholders)
   ============================================================ */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}
.gallery__item {
    aspect-ratio: 4 / 3;
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
    display: grid; place-items: end start;
    color: #fff;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    background: linear-gradient(160deg, var(--blue-700), var(--blue-500));
}
.gallery__item--warm { background: linear-gradient(160deg, var(--copper-600), var(--copper-500)); }
.gallery__item--mix { background: linear-gradient(160deg, var(--blue-800), var(--copper-500)); }
.gallery__item::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.35) 100%);
}
.gallery__item span {
    position: relative;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
}
.gallery__item small {
    position: relative;
    display: block;
    font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em;
    opacity: 0.85;
    margin-top: .25rem;
}
.gallery__item img {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    z-index: 0;
}
.gallery__item figcaption {
    position: relative;
    z-index: 2;
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.02em;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}
figure.gallery__item { margin: 0; padding: 1rem 1.25rem; }

/* ============================================================
   POURQUOI EXETYS (feature list)
   ============================================================ */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}
.feature {
    padding: 1.5rem;
    border-left: 3px solid var(--copper-500);
    background: #fff;
    border-radius: 0 var(--radius) var(--radius) 0;
    box-shadow: var(--shadow-sm);
}
.feature h3 { font-size: 1.05rem; margin-bottom: .35rem; }
.feature p { font-size: 0.95rem; }

/* ============================================================
   PAGE HEADER (inner pages)
   ============================================================ */
.page-header {
    padding: clamp(3rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem);
    background:
        radial-gradient(700px 260px at 90% 0%, rgba(246,167,43,0.15), transparent 60%),
        linear-gradient(180deg, var(--blue-050) 0%, #fff 100%);
    border-bottom: 1px solid var(--line);
}
.page-header__eyebrow {
    display: inline-block;
    font-size: 0.82rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--copper-600);
    font-weight: 600;
    margin-bottom: .75rem;
}
.page-header h1 { margin-bottom: 1rem; max-width: 20ch; }
.page-header p { max-width: 60ch; font-size: 1.05rem; color: var(--ink-700); }

/* ============================================================
   PROSE (content pages)
   ============================================================ */
.prose {
    max-width: 780px;
}
.prose h2 { margin: 2.25rem 0 .75rem; font-size: 1.6rem; }
.prose h3 { margin: 1.5rem 0 .5rem; }
.prose p { margin-bottom: 1rem; }
.prose ul { margin: 0 0 1.25rem 1.4rem; }
.prose ul li { margin-bottom: .35rem; color: var(--ink-700); }
.prose a { color: var(--blue-700); text-decoration: underline; text-underline-offset: 3px; }

.prose--two-col {
    max-width: 1040px;
    margin-inline: auto;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
}
.prose { margin-inline: auto; }
.page-header .container > * { max-width: 900px; }
.prose--two-col .aside {
    background: var(--blue-050);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--line);
}
.prose--two-col .aside h3 { font-size: 1.05rem; margin-bottom: .5rem; color: var(--blue-900); }
.prose--two-col .aside ul { margin: .5rem 0 0 1.2rem; }

/* Placeholder banner for missing content */
.placeholder-note {
    display: inline-block;
    padding: .35rem .8rem;
    background: var(--copper-050);
    border: 1px dashed var(--copper-500);
    color: var(--copper-700);
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: clamp(1.5rem, 4vw, 3rem);
}
.contact-form {
    background: #fff;
    padding: 1.75rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}
.contact-form .field,
.contact-form .form-row { margin-bottom: 1rem; }
.contact-form label { display: block; font-weight: 600; margin-bottom: .35rem; font-size: 0.92rem; color: var(--ink-700); }
.contact-form input, .contact-form select, .contact-form textarea {
    width: 100%;
    padding: .7rem .85rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    font-family: inherit; font-size: 0.95rem;
    color: var(--ink-900);
    background: #fff;
    color-scheme: light;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: #94a3b8; opacity: 1; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--blue-700);
    box-shadow: 0 0 0 3px rgba(10,73,43,0.15);
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form__success,
.contact-form__error { margin-bottom: 1rem; }
.contact-info {
    background: var(--blue-900);
    color: #fff;
    padding: 1.75rem;
    border-radius: var(--radius);
}
.contact-info h3 { color: #fff; font-family: 'Inter', system-ui, sans-serif; margin-bottom: 1rem; }
.contact-info p { color: rgba(255,255,255,0.85); margin-bottom: .75rem; }
.contact-info a { color: var(--copper-300); }
.contact-info a:hover { color: #fff; }

/* ============================================================
   QUADRATYS BAND
   ============================================================ */
.quadratys-band {
    background: linear-gradient(90deg, var(--blue-900), var(--blue-700));
    color: #fff;
    padding: 2rem 0;
}
.quadratys-band__eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.78rem;
    color: var(--copper-300);
    margin-bottom: .5rem;
}
.quadratys-band__text {
    color: rgba(255,255,255,0.94);
    font-size: 1.05rem;
    max-width: 900px;
}
.quadratys-band__text strong { color: #fff; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
    background: var(--ink-900);
    color: rgba(255,255,255,0.75);
    padding: 3.5rem 0 0;
    margin-top: 0;
}
.site-footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 2rem;
    align-items: start;
}
.site-footer__brand { display: flex; align-items: center; gap: .75rem; margin-bottom: .75rem; }
.site-footer__brand img { filter: brightness(0) invert(1); opacity: 0.95; }
.site-footer h3 { color: #fff; font-family: 'Inter', system-ui, sans-serif; font-size: 1.35rem; margin: 0; }
.site-footer h4 { color: #fff; font-size: 0.85rem; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: .9rem; font-family: 'Inter', sans-serif; font-weight: 600; }
.site-footer p { color: rgba(255,255,255,0.7); font-size: 0.93rem; margin-bottom: .35rem; }
.site-footer a { color: rgba(255,255,255,0.85); }
.site-footer a:hover { color: var(--copper-300); }
.site-footer__links { list-style: none; padding: 0; }
.site-footer__links li { font-size: 0.92rem; color: rgba(255,255,255,0.7); margin-bottom: .35rem; }
.site-footer__copy {
    margin-top: 2.5rem;
    padding: 1.25rem 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
    text-align: center;
}
.site-footer__copy a { color: rgba(255,255,255,0.75); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
    .hero__grid { grid-template-columns: 1fr; }
    .prose--two-col { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .site-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    .nav-toggle { display: flex; margin-left: auto; }
    .site-header__cta { display: none; }
    .site-nav {
        position: absolute; top: 100%; left: 0; right: 0;
        background: #fff;
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow-md);
        display: none;
        margin: 0;
    }
    .site-nav.is-open { display: block; }
    .site-nav ul {
        flex-direction: column;
        gap: 0;
        padding: 0.75rem 1rem;
    }
    .site-nav li { border-bottom: 1px solid var(--line); }
    .site-nav li:last-child { border-bottom: 0; }
    .site-nav a { display: block; padding: 0.9rem 0; }
    .site-nav a::after { display: none; }

    .site-footer__grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Realisations - fiches chantiers
   ========================================================================== */
.realisations-list {
    display: grid;
    gap: 1.5rem;
}
.realisation {
    padding: 1.75rem 1.75rem 1.5rem;
    background: var(--paper-soft);
    border: 1px solid var(--line);
    border-left: 4px solid var(--blue-700);
    border-radius: 14px;
}
.realisation:nth-child(even) { border-left-color: var(--copper-600); }
.realisation__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    font-size: 0.85rem;
    color: var(--ink-500);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}
.realisation__period { color: var(--blue-700); }
.realisation__ca { color: var(--copper-600); }
.realisation h2 {
    margin: 0 0 0.5rem;
    font-size: 1.35rem;
}
.realisation__lead {
    font-weight: 500;
    color: var(--ink-800, #1f2933);
    margin-bottom: 0.5rem;
}
.realisation__tag {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.2rem 0.7rem;
    background: var(--blue-700);
    color: #fff;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-radius: 999px;
}