/*
 * layout.css
 * Header, navigation, structure des sections, hero, footer.
 */

.header {
	position: fixed;
	inset: 0 0 auto 0;
	height: var(--header-height);
	z-index: 100;
	transition: background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-med);
}

.header.is-scrolled {
	background: color-mix(in srgb, var(--bg) 82%, transparent);
	backdrop-filter: blur(14px);
	-webkit-backdrop-filter: blur(14px);
	box-shadow: 0 1px 0 var(--border);
}

.header.is-hidden {
	transform: translateY(-100%);
}

.nav {
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-md);
}

.nav__logo {
	font-family: var(--font-display);
	font-size: 1.5rem;
	font-weight: 700;
}

.nav__list {
	display: flex;
	gap: var(--space-md);
	list-style: none;
}

.nav__link {
	position: relative;
	font-size: 0.95rem;
	color: var(--text-muted);
	transition: color var(--transition-fast);
	padding: 0.4rem 0;
}

.nav__link::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: 0;
	width: 100%;
	height: 2px;
	background: var(--gradient);
	transform: scaleX(0);
	transform-origin: left;
	transition: transform var(--transition-med);
}

.nav__link:hover,
.nav__link.is-active {
	color: var(--text);
}

.nav__link:hover::after,
.nav__link.is-active::after {
	transform: scaleX(1);
}

.nav__actions {
	display: flex;
	align-items: center;
	gap: var(--space-sm);
}

.nav__burger {
	display: none;
	flex-direction: column;
	gap: 5px;
	padding: 8px;
}

.nav__burger span {
	width: 24px;
	height: 2px;
	background: var(--text);
	border-radius: 2px;
	transition: transform var(--transition-med), opacity var(--transition-fast);
}

.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero --- */

.hero {
	position: relative;
	min-height: 100svh;
	display: flex;
	align-items: center;
	overflow: hidden;
}

.hero__canvas {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
}

.hero__content {
	position: relative;
	z-index: 1;
}

.hero__greeting {
	color: var(--accent);
	font-family: var(--font-display);
	letter-spacing: 0.08em;
	margin-bottom: var(--space-xs);
}

.hero__name {
	font-size: clamp(2.6rem, 7vw, 5rem);
	font-weight: 700;
	margin-bottom: var(--space-xs);
}

.hero__role {
	font-family: var(--font-display);
	font-size: clamp(1.3rem, 3.2vw, 2rem);
	color: var(--text-muted);
	min-height: 1.4em;
	margin-bottom: var(--space-md);
}

.hero__pitch {
	max-width: 560px;
	color: var(--text-muted);
	margin-bottom: var(--space-md);
}

.hero__cta {
	display: flex;
	gap: var(--space-sm);
	flex-wrap: wrap;
}

.hero__scroll {
	position: absolute;
	bottom: 2rem;
	left: 50%;
	transform: translateX(-50%);
	z-index: 1;
}

.hero__scroll-mouse {
	display: block;
	width: 26px;
	height: 42px;
	border: 2px solid var(--text-muted);
	border-radius: 14px;
	position: relative;
}

.hero__scroll-mouse span {
	position: absolute;
	top: 7px;
	left: 50%;
	width: 4px;
	height: 8px;
	margin-left: -2px;
	background: var(--accent);
	border-radius: 2px;
	animation: scroll-wheel 1.8s ease-in-out infinite;
}

/* --- Sections & footer --- */

.section {
	padding: var(--space-xl) 0;
}

.section:nth-of-type(even) {
	background: var(--bg-alt);
}

.section__title {
	display: flex;
	align-items: baseline;
	gap: var(--space-sm);
	font-size: clamp(1.7rem, 4vw, 2.4rem);
	margin-bottom: var(--space-lg);
}

.section__number {
	font-size: 0.9rem;
	color: var(--accent);
	letter-spacing: 0.15em;
}

.footer {
	border-top: 1px solid var(--border);
	padding: var(--space-md) 0;
}

.footer__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-sm);
	color: var(--text-muted);
	font-size: 0.9rem;
}

.footer__top {
	width: 40px;
	height: 40px;
	display: grid;
	place-items: center;
	border: 1px solid var(--border);
	border-radius: 50%;
	transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.footer__top:hover {
	border-color: var(--accent);
	color: var(--accent);
	transform: translateY(-3px);
}