/* Page présentation — charte sombre / or (alignée home) */

.presentation {
	--pr-bg: #161b22;
	--pr-bg-elevated: #1e2530;
	--pr-panel: #10141a;
	--pr-border: #3a4556;
	--pr-border-gold: #6b5c3f;
	--pr-text: #e8ecf1;
	--pr-muted: #9aa5b5;
	--pr-accent: #d4a84b;
	--pr-accent-soft: rgba(212, 168, 75, 0.12);
	--pr-radius: 10px;
	--pr-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);

	font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
	color: var(--pr-text);
	width: 100%;
	max-width: none;
	margin: 0 0 2rem;
	box-sizing: border-box;
}

.presentation__header {
	padding: 1.35rem 1.5rem;
	background: linear-gradient(135deg, #1e2836 0%, #151a22 100%);
	border: 1px solid var(--pr-border);
	border-radius: var(--pr-radius) var(--pr-radius) 0 0;
	text-align: center;
}

.presentation__title {
	margin: 0;
	font-size: clamp(1.35rem, 2.5vw, 1.75rem);
	font-weight: 800;
	color: var(--pr-accent);
	line-height: 1.25;
}

.presentation__subtitle {
	margin: 0.5rem 0 0;
	font-size: 0.95rem;
	color: var(--pr-muted);
	line-height: 1.5;
}

.presentation__shell {
	background: var(--pr-bg);
	border: 1px solid var(--pr-border);
	border-top: none;
	border-radius: 0 0 var(--pr-radius) var(--pr-radius);
	padding: 1rem 1.25rem 1.5rem;
}

.presentation__layout {
	display: flex;
	gap: 1rem;
	min-height: 520px;
	max-height: min(75vh, 820px);
}

.presentation__nav {
	width: 220px;
	flex-shrink: 0;
	background: var(--pr-panel);
	border: 1px solid var(--pr-border-gold);
	border-radius: 8px;
	padding: 0.75rem;
	overflow-y: auto;
	scrollbar-width: thin;
	scrollbar-color: var(--pr-border-gold) var(--pr-panel);
}

.presentation__nav-list {
	list-style: none;
	margin: 0;
	padding: 0;
}

.presentation__nav-link {
	display: block;
	padding: 0.5rem 0.75rem;
	margin: 0.35rem 0;
	font-size: 0.82rem;
	font-weight: 600;
	color: #e6e0c8;
	text-decoration: none;
	background: #1b1f26;
	border: 1px solid #4d442f;
	border-radius: 6px;
	transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.presentation__nav-link:hover,
.presentation__nav-link.is-active {
	background: var(--pr-accent-soft);
	color: #fff;
	border-color: var(--pr-accent);
}

.presentation__main {
	flex: 1;
	min-width: 0;
	overflow-y: auto;
	padding: 0.5rem 1rem 1rem;
	background: var(--pr-panel);
	border: 1px solid var(--pr-border-gold);
	border-radius: 8px;
	scrollbar-width: thin;
	scrollbar-color: var(--pr-border-gold) var(--pr-panel);
}

.presentation__nav::-webkit-scrollbar,
.presentation__main::-webkit-scrollbar {
	width: 7px;
}

.presentation__nav::-webkit-scrollbar-thumb,
.presentation__main::-webkit-scrollbar-thumb {
	background: #4d442f;
	border-radius: 4px;
}

.presentation__section {
	display: none;
}

.presentation__section.is-active {
	display: block;
	animation: presentation-fade 0.35s ease;
}

@keyframes presentation-fade {
	from { opacity: 0; }
	to { opacity: 1; }
}

.presentation__section h2 {
	font-size: clamp(1.25rem, 2vw, 1.65rem);
	font-weight: 800;
	color: var(--pr-accent);
	text-align: center;
	margin: 0 0 1rem;
}

.presentation__section h3 {
	font-size: 1.35rem;
	font-weight: 700;
	color: var(--pr-accent);
	margin: 1.75rem 0 0.85rem;
}

.presentation__section h4 {
	font-size: 1.1rem;
	font-weight: 700;
	color: #e2dcc4;
	margin: 1.35rem 0 0.65rem;
}

.presentation__section p {
	font-size: 0.98rem;
	line-height: 1.55;
	margin: 0 0 0.9rem;
	color: var(--pr-text);
}

.presentation__lead,
.presentation__conclusion {
	font-size: 1.05rem;
	font-weight: 500;
	color: #fff;
}

.presentation__center {
	text-align: center;
}

.presentation__highlight {
	color: var(--pr-accent);
	font-weight: 600;
}

.presentation__section ul {
	list-style: none;
	margin: 0.85rem 0;
	padding: 0;
}

.presentation__section ul li {
	position: relative;
	padding: 0.35rem 0 0.35rem 1.1rem;
	font-size: 0.95rem;
	line-height: 1.45;
	color: var(--pr-muted);
}

.presentation__section ul li::before {
	content: "•";
	position: absolute;
	left: 0;
	color: var(--pr-accent);
}

.presentation__grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 1rem;
	margin: 1.25rem 0;
}

.presentation__card {
	background: #212019;
	padding: 1.25rem;
	border-radius: var(--pr-radius);
	border: 1px solid #c5b771;
	transition: transform 0.15s ease, border-color 0.15s ease;
}

.presentation__card:hover {
	border-color: var(--pr-accent);
	transform: translateY(-2px);
}

.presentation__card h4 {
	margin-top: 0;
}

.presentation__section img {
	display: block;
	max-width: 100%;
	height: auto;
	margin: 1.5rem auto;
	border-radius: var(--pr-radius);
	border: 1px solid var(--pr-border);
	box-shadow: var(--pr-shadow);
}

.presentation__mt-4 { margin-top: 1.25rem; }
.presentation__mt-5 { margin-top: 2rem; }
.presentation__mb-4 { margin-bottom: 1.25rem; }

.presentation__table-wrap {
	overflow-x: auto;
	margin: 1rem 0;
	-webkit-overflow-scrolling: touch;
}

.presentation__table {
	width: 100%;
	border-collapse: collapse;
	background: var(--pr-bg-elevated);
	border-radius: var(--pr-radius);
	overflow: hidden;
	border: 1px solid var(--pr-border);
	font-size: 0.9rem;
	color: var(--pr-muted);
}

.presentation__table thead {
	background: #4d442f;
	color: #fff;
}

.presentation__table th,
.presentation__table td {
	padding: 0.65rem 0.85rem;
	text-align: left;
	border-bottom: 1px solid #4d442f;
}

.presentation__table th {
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	font-size: 0.78rem;
}

.presentation__table tr:last-child td {
	border-bottom: none;
}

.presentation__table tr:hover {
	background: rgba(212, 168, 75, 0.06);
}

.presentation__table td:first-child {
	font-weight: 600;
	color: #fff;
}

.presentation__table td span {
	color: var(--pr-accent);
	font-weight: 600;
}

.presentation__note {
	font-size: 0.9rem;
	color: var(--pr-muted);
	text-align: center;
}

@media (max-width: 992px) {
	.presentation__layout {
		flex-direction: column;
		max-height: none;
		min-height: 0;
	}

	.presentation__nav {
		width: 100%;
		max-height: 38vh;
	}

	.presentation__main {
		max-height: 60vh;
	}
}

@media (max-width: 768px) {
	.presentation__shell {
		padding: 0.75rem;
	}

	.presentation__table {
		font-size: 0.82rem;
	}
}