/* =========================================================
   STRUCTURE — Feuille de style principale
   Direction : plan technique / chantier
   ========================================================= */

:root {
	/* Couleurs */
	--color-blueprint: #1B3A5C;
	--color-ink: #0D1B2A;
	--color-paper: #F5F3EF;
	--color-concrete: #B8B2A7;
	--color-signal: #E85D2C;
	--color-steel: #6B7280;
	--color-white: #FFFFFF;

	/* Typographie */
	--font-display: 'Space Grotesk', sans-serif;
	--font-body: 'IBM Plex Sans', sans-serif;
	--font-mono: 'IBM Plex Mono', monospace;

	/* Échelle */
	--space-1: 0.5rem;
	--space-2: 1rem;
	--space-3: 1.5rem;
	--space-4: 2.5rem;
	--space-5: 4rem;
	--space-6: 6rem;
	--space-7: 9rem;

	--content-max: 1240px;
	--margin-gutter: 3.5rem;
}

/* ---------- Reset minimal ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
	margin: 0;
	background: var(--color-paper);
	color: var(--color-ink);
	font-family: var(--font-body);
	font-size: 17px;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; line-height: 1.1; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

.screen-reader-text {
	position: absolute; width: 1px; height: 1px; overflow: hidden;
	clip: rect(1px,1px,1px,1px); white-space: nowrap;
}
.skip-link:focus {
	position: fixed; top: var(--space-2); left: var(--space-2);
	width: auto; height: auto; padding: var(--space-1) var(--space-2);
	background: var(--color-signal); color: var(--color-white); z-index: 1000;
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- Repères de marge (signature) ---------- */
.margin-ruler {
	position: fixed;
	top: 0;
	bottom: 0;
	width: var(--margin-gutter);
	display: none;
	flex-direction: column;
	justify-content: space-between;
	padding: var(--space-3) 0;
	z-index: 5;
	pointer-events: none;
}
.margin-ruler--left { left: 0; align-items: flex-start; }
.margin-ruler--right { right: 0; align-items: flex-end; }
.ruler-tick {
	font-family: var(--font-mono);
	font-size: 0.65rem;
	letter-spacing: 0.05em;
	color: var(--color-steel);
	writing-mode: vertical-rl;
	transform: rotate(180deg);
}
@media (min-width: 1400px) {
	.margin-ruler { display: flex; }
}

/* ---------- Header ---------- */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(245, 243, 239, 0.92);
	backdrop-filter: blur(6px);
	border-bottom: 1px solid rgba(13, 27, 42, 0.1);
}
.header-inner {
	max-width: var(--content-max);
	margin: 0 auto;
	padding: var(--space-2) var(--space-3);
	display: flex;
	align-items: center;
	justify-content: space-between;
}
.site-title-link { display: flex; flex-direction: column; }
.site-title {
	font-family: var(--font-display);
	font-weight: 700;
	font-size: 1.25rem;
	letter-spacing: -0.01em;
}
.site-tagline {
	font-family: var(--font-mono);
	font-size: 0.7rem;
	color: var(--color-steel);
	text-transform: uppercase;
	letter-spacing: 0.05em;
}
.primary-navigation .nav-menu {
	display: flex;
	gap: var(--space-4);
}
.nav-menu a {
	font-family: var(--font-mono);
	font-size: 0.8rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	position: relative;
	padding-bottom: 4px;
}
.nav-menu a::after {
	content: "";
	position: absolute;
	left: 0; bottom: 0;
	width: 0; height: 2px;
	background: var(--color-signal);
	transition: width 0.25s ease;
}
.nav-menu a:hover::after,
.nav-menu a:focus::after { width: 100%; }

.menu-toggle {
	display: none;
	background: none;
	border: 1px solid var(--color-ink);
	padding: var(--space-1) var(--space-2);
	font-family: var(--font-mono);
	font-size: 0.75rem;
	text-transform: uppercase;
	align-items: center;
	gap: var(--space-1);
}
.menu-toggle-icon {
	width: 16px; height: 1px; background: var(--color-ink); position: relative;
}
.menu-toggle-icon::before, .menu-toggle-icon::after {
	content: ""; position: absolute; left: 0; width: 16px; height: 1px; background: var(--color-ink);
}
.menu-toggle-icon::before { top: -5px; }
.menu-toggle-icon::after { top: 5px; }

@media (max-width: 860px) {
	.menu-toggle { display: inline-flex; }
	.primary-navigation {
		position: absolute;
		top: 100%; left: 0; right: 0;
		background: var(--color-paper);
		border-bottom: 1px solid rgba(13,27,42,0.1);
		display: none;
		padding: var(--space-2) var(--space-3);
	}
	.primary-navigation.is-open { display: block; }
	.nav-menu { flex-direction: column; gap: var(--space-2); }
}

/* ---------- Hero ---------- */
.hero {
	position: relative;
	max-width: var(--content-max);
	margin: 0 auto;
	padding: var(--space-6) var(--space-3) var(--space-5);
	display: grid;
	grid-template-columns: 1.1fr 0.9fr;
	gap: var(--space-4);
	align-items: center;
	overflow: hidden;
}
.hero-eyebrow {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	letter-spacing: 0.08em;
	color: var(--color-signal);
	text-transform: uppercase;
	display: inline-block;
	margin-bottom: var(--space-2);
}
.hero-title {
	font-size: clamp(2.75rem, 6vw, 4.75rem);
	font-weight: 700;
	letter-spacing: -0.02em;
	color: var(--color-ink);
}
.hero-title-accent { color: var(--color-blueprint); }
.hero-lede {
	max-width: 40ch;
	margin-top: var(--space-3);
	color: var(--color-steel);
	font-size: 1.05rem;
}
.hero-actions {
	display: flex;
	gap: var(--space-2);
	margin-top: var(--space-4);
	flex-wrap: wrap;
}
.hero-illustration {
	width: 100%;
	height: auto;
	color: var(--color-blueprint);
	stroke-dasharray: 900;
	stroke-dashoffset: 900;
	animation: draw-hero 1.6s ease forwards 0.2s;
}
@keyframes draw-hero {
	to { stroke-dashoffset: 0; }
}
.svg-label {
	font-family: var(--font-mono);
	font-size: 9px;
	fill: var(--color-steel);
	stroke: none;
}

@media (max-width: 900px) {
	.hero { grid-template-columns: 1fr; padding-top: var(--space-5); }
	.hero-illustration { max-width: 280px; }
}

/* ---------- Boutons ---------- */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0.9em 1.6em;
	font-family: var(--font-mono);
	font-size: 0.8rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	border: 1px solid var(--color-ink);
	transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.btn-primary {
	background: var(--color-signal);
	border-color: var(--color-signal);
	color: var(--color-white);
}
.btn-primary:hover { background: #c94d20; transform: translateY(-2px); }
.btn-ghost {
	background: transparent;
	color: var(--color-ink);
}
.btn-ghost:hover { background: var(--color-ink); color: var(--color-paper); }
.btn-large { padding: 1.1em 2em; font-size: 0.9rem; }

/* ---------- Sections génériques ---------- */
.section { padding: var(--space-6) var(--space-3); }
.section-inner { max-width: var(--content-max); margin: 0 auto; }
.section-header { margin-bottom: var(--space-4); }
.section-tag {
	display: block;
	font-family: var(--font-mono);
	font-size: 0.75rem;
	letter-spacing: 0.08em;
	color: var(--color-signal);
	text-transform: uppercase;
	margin-bottom: var(--space-2);
}
.section-tag--light { color: rgba(245,243,239,0.7); }
.section-title {
	font-size: clamp(1.9rem, 3.5vw, 2.75rem);
	max-width: 20ch;
}

/* ---------- Services : "plan de site" en grille ---------- */
.section--services { background: var(--color-white); border-top: 1px solid rgba(13,27,42,0.08); border-bottom: 1px solid rgba(13,27,42,0.08); }
.services-plan {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	border: 1px solid rgba(13,27,42,0.12);
}
.service-cell {
	padding: var(--space-4) var(--space-3);
	border-right: 1px solid rgba(13,27,42,0.12);
	position: relative;
}
.service-cell:last-child { border-right: none; }
.service-code {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	color: var(--color-concrete);
	border: 1px solid var(--color-concrete);
	width: 22px; height: 22px;
	display: inline-flex; align-items: center; justify-content: center;
	margin-bottom: var(--space-2);
}
.service-cell h3 { font-size: 1.1rem; margin-bottom: var(--space-1); }
.service-cell p { color: var(--color-steel); font-size: 0.92rem; margin: 0; }

@media (max-width: 900px) {
	.services-plan { grid-template-columns: 1fr 1fr; }
	.service-cell { border-bottom: 1px solid rgba(13,27,42,0.12); }
}
@media (max-width: 560px) {
	.services-plan { grid-template-columns: 1fr; }
}

/* ---------- Projets ---------- */
.projects-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: var(--space-3);
}
.project-card { display: block; }
.project-media {
	aspect-ratio: 4 / 3;
	overflow: hidden;
	background: var(--color-concrete);
}
.project-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.project-card:hover .project-media img { transform: scale(1.05); }
.project-media-placeholder { width: 100%; height: 100%; background: repeating-linear-gradient(45deg, var(--color-concrete), var(--color-concrete) 10px, #cfc9be 10px, #cfc9be 20px); }
.project-titleblock {
	padding: var(--space-2) 0;
	border-top: 1px solid var(--color-ink);
	margin-top: var(--space-1);
	display: flex;
	justify-content: space-between;
	gap: var(--space-2);
}
.project-name { font-family: var(--font-display); font-weight: 600; }
.project-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-steel); white-space: nowrap; }

@media (max-width: 900px) {
	.projects-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
	.projects-grid { grid-template-columns: 1fr; }
}

/* ---------- CTA ---------- */
.section--cta {
	background: var(--color-ink);
	color: var(--color-paper);
}
.cta-inner { text-align: left; }
.cta-title {
	font-size: clamp(2rem, 4vw, 3.25rem);
	color: var(--color-paper);
	margin: var(--space-2) 0 var(--space-4);
}
.section--cta .btn-primary { color: var(--color-white); }

/* ---------- Cartouche pied de page ---------- */
.footer-titleblock {
	max-width: var(--content-max);
	margin: 0 auto;
	padding: var(--space-3) var(--space-3) 0;
	border-top: 2px solid var(--color-ink);
}
.titleblock-row {
	display: flex;
	gap: var(--space-2);
	font-family: var(--font-mono);
	font-size: 0.8rem;
	padding: 0.4em 0;
	border-bottom: 1px dashed rgba(13,27,42,0.2);
}
.titleblock-label { color: var(--color-steel); min-width: 120px; text-transform: uppercase; letter-spacing: 0.05em; }

.site-footer { background: var(--color-paper); }
.footer-inner { max-width: var(--content-max); margin: 0 auto; padding: var(--space-4) var(--space-3); }
.footer-columns {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: var(--space-3);
	margin-bottom: var(--space-4);
}
.footer-widget-title { font-size: 1rem; margin-bottom: var(--space-1); }
.footer-menu { display: flex; flex-direction: column; gap: 0.5em; }
.footer-menu a { font-family: var(--font-mono); font-size: 0.85rem; }
.footer-bottom {
	display: flex;
	justify-content: space-between;
	font-family: var(--font-mono);
	font-size: 0.7rem;
	color: var(--color-steel);
	text-transform: uppercase;
	letter-spacing: 0.05em;
	border-top: 1px solid rgba(13,27,42,0.1);
	padding-top: var(--space-2);
}

@media (max-width: 700px) {
	.footer-columns { grid-template-columns: 1fr; }
	.footer-bottom { flex-direction: column; gap: 0.5em; }
}

/* ---------- Pages de contenu génériques ---------- */
.content-page { padding: var(--space-6) 0; }
.page-header { margin-bottom: var(--space-3); }
.page-title { font-size: clamp(2rem, 4vw, 3rem); }
.page-meta { font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-steel); margin-top: var(--space-1); }
.page-thumbnail { margin: var(--space-3) 0; }
.page-content { max-width: 70ch; font-size: 1.05rem; }
.page-content h2, .page-content h3 { margin-top: 1.5em; margin-bottom: 0.5em; }

.project-details-titleblock { border: 1px solid rgba(13,27,42,0.15); margin: var(--space-3) 0; max-width: 480px; }
.project-details-titleblock .titleblock-row { padding: 0.6em 1em; }
.project-nav { margin-top: var(--space-4); }

.post-list-item { padding: var(--space-3) 0; border-bottom: 1px solid rgba(13,27,42,0.1); }
.post-list-title { font-size: 1.4rem; }
.post-list-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-steel); margin: 0.3em 0; }

.error-404-page { text-align: left; }

/* ---------- "Voir plus" sous la grille de projets ---------- */
.section-more { margin-top: var(--space-4); text-align: center; }

.cta-lede { max-width: 50ch; color: rgba(245,243,239,0.75); margin: var(--space-2) 0 var(--space-3); }

/* ---------- Carrousel ---------- */
.project-carousel {
	position: relative;
	max-width: var(--content-max);
	margin: var(--space-4) auto;
	overflow: hidden;
}
.project-carousel--single { margin: var(--space-3) 0; }
.carousel-track {
	display: flex;
	transition: transform 0.4s ease;
}
.carousel-slide {
	flex: 0 0 100%;
	position: relative;
	aspect-ratio: 16 / 9;
}
.carousel-slide img, .carousel-slide .project-media-placeholder {
	width: 100%; height: 100%; object-fit: cover; display: block;
}
.carousel-slide-link { display: block; height: 100%; position: relative; }
.carousel-caption {
	position: absolute;
	left: 0; right: 0; bottom: 0;
	display: flex;
	justify-content: space-between;
	gap: var(--space-2);
	padding: var(--space-2) var(--space-3);
	background: linear-gradient(to top, rgba(13,27,42,0.85), transparent);
	color: var(--color-paper);
}
.carousel-caption .project-name { font-family: var(--font-display); font-weight: 600; }
.carousel-caption .project-meta { font-family: var(--font-mono); font-size: 0.75rem; color: rgba(245,243,239,0.8); }

.carousel-arrow {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	width: 44px; height: 44px;
	background: var(--color-paper);
	border: 1px solid var(--color-ink);
	border-radius: 50%;
	font-size: 1.1rem;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: background 0.2s ease, color 0.2s ease;
}
.carousel-arrow:hover { background: var(--color-signal); color: var(--color-white); border-color: var(--color-signal); }
.carousel-arrow--prev { left: var(--space-2); }
.carousel-arrow--next { right: var(--space-2); }

.carousel-dots {
	position: absolute;
	bottom: var(--space-2);
	left: 50%;
	transform: translateX(-50%);
	display: flex;
	gap: 0.5em;
}
.carousel-dot {
	width: 8px; height: 8px;
	border-radius: 50%;
	background: rgba(245,243,239,0.5);
	border: none;
	padding: 0;
}
.carousel-dot.is-active { background: var(--color-signal); }

@media (max-width: 700px) {
	.carousel-arrow { width: 36px; height: 36px; }
}

/* ---------- Page À propos ---------- */
.about-lede { max-width: 65ch; font-size: 1.1rem; color: var(--color-steel); margin-bottom: var(--space-4); }
.about-media { margin-bottom: var(--space-5); aspect-ratio: 21 / 9; overflow: hidden; }
.about-media img { width: 100%; height: 100%; object-fit: cover; }

.about-stats {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: var(--space-3);
	padding: var(--space-6) var(--space-3);
	border-top: 1px solid rgba(13,27,42,0.1);
}
.stat-cell { text-align: left; }
.stat-number {
	display: block;
	font-family: var(--font-display);
	font-size: clamp(2rem, 4vw, 3rem);
	color: var(--color-blueprint);
	font-weight: 700;
}
.stat-label { font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-steel); text-transform: uppercase; }

.about-cta {
	text-align: center;
	padding: var(--space-5) var(--space-3);
	border-top: 1px solid rgba(13,27,42,0.1);
}
.cta-title-small { font-size: 1.6rem; margin-bottom: var(--space-2); }

@media (max-width: 800px) {
	.about-stats { grid-template-columns: 1fr 1fr; }
}

/* ---------- Page Services ---------- */
.services-detail { padding-bottom: var(--space-5); }
.service-detail-row {
	display: grid;
	grid-template-columns: 80px 1fr;
	gap: var(--space-3);
	padding: var(--space-4) 0;
	border-bottom: 1px solid rgba(13,27,42,0.12);
}
.service-detail-num {
	font-family: var(--font-mono);
	font-size: 1.5rem;
	color: var(--color-concrete);
}
.service-detail-body h2 { font-size: 1.4rem; margin-bottom: var(--space-1); }
.service-detail-body p { color: var(--color-steel); max-width: 60ch; }
.service-detail-list { margin-top: var(--space-2); }
.service-detail-list li {
	font-family: var(--font-mono);
	font-size: 0.85rem;
	padding: 0.4em 0;
	border-top: 1px dashed rgba(13,27,42,0.15);
}
.service-detail-list li:first-child { border-top: none; }

@media (max-width: 700px) {
	.service-detail-row { grid-template-columns: 1fr; gap: var(--space-1); }
}

/* ---------- Page Contact ---------- */
.page-lede { max-width: 60ch; color: var(--color-steel); margin-top: var(--space-2); font-size: 1.05rem; }
.contact-grid {
	display: grid;
	grid-template-columns: 1.4fr 1fr;
	gap: var(--space-5);
	margin-top: var(--space-4);
}
.form-row { margin-bottom: var(--space-3); }
.form-row label {
	display: block;
	font-family: var(--font-mono);
	font-size: 0.75rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--color-steel);
	margin-bottom: 0.4em;
}
.form-row input, .form-row select, .form-row textarea {
	width: 100%;
	padding: 0.7em 0.9em;
	border: 1px solid rgba(13,27,42,0.25);
	background: var(--color-white);
	font-family: var(--font-body);
	font-size: 1rem;
	color: var(--color-ink);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
	outline: 2px solid var(--color-signal);
	outline-offset: 1px;
}
.form-note { font-size: 0.8rem; color: var(--color-steel); margin-top: var(--space-2); }

@media (max-width: 800px) {
	.contact-grid { grid-template-columns: 1fr; }
}