/* ==========================================================================
   Bonga Banzi Consulting - 2026 corporate refresh
   Charcoal + metallic gold, Sora headings / Inter body
   ========================================================================== */

:root {
	--bg: #141414;
	--bg-alt: #1a1a1a;
	--bg-card: #202020;
	--charcoal: #2e2e2e;            /* matches logo artwork background */
	--ink: #f4f1ea;
	--ink-dim: #b9b4a8;
	--gold: #d8b65e;
	--gold-bright: #f0d78c;
	--gold-deep: #a8853b;
	--gold-grad: linear-gradient(135deg, #f0d78c 0%, #d8b65e 45%, #a8853b 100%);
	--line: rgba(216, 182, 94, 0.22);
	--radius: 14px;
	--head: 'Sora', sans-serif;
	--body: 'Inter', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
	background: var(--bg);
	color: var(--ink);
	font-family: var(--body);
	font-weight: 300;
	line-height: 1.7;
	-webkit-font-smoothing: antialiased;
}

.wrap { width: min(1120px, 92%); margin: 0 auto; }

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

h1, h2, h3 { font-family: var(--head); line-height: 1.2; }

h1 { font-size: clamp(1.7rem, 4.2vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.45rem, 3vw, 2.2rem); font-weight: 600; margin-bottom: 1.2rem; }
h3 { font-size: 1.25rem; font-weight: 600; }

.gold {
	background: var(--gold-grad);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}

.eyebrow {
	font-family: var(--head);
	font-size: 0.78rem;
	font-weight: 600;
	letter-spacing: 0.28em;
	text-transform: uppercase;
	color: var(--gold);
	margin-bottom: 1rem;
}

/* ------------------------------ buttons -------------------------------- */

.btn {
	display: inline-block;
	font-family: var(--head);
	font-size: 0.86rem;
	font-weight: 600;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	text-decoration: none;
	padding: 0.85em 1.7em;
	border-radius: 999px;
	transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.btn-lg { padding: 1.05em 2.1em; }

.btn-gold {
	background: var(--gold-grad);
	color: #171308;
	box-shadow: 0 6px 24px rgba(216, 182, 94, 0.25);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(216, 182, 94, 0.4); }

.btn-ghost {
	border: 1px solid var(--line);
	color: var(--gold-bright);
}
.btn-ghost:hover { background: rgba(216, 182, 94, 0.1); border-color: var(--gold); }

/* ------------------------------ header --------------------------------- */

.site-header {
	position: fixed;
	inset: 0 0 auto 0;
	z-index: 50;
	background: rgba(20, 20, 20, 0.55);
	backdrop-filter: blur(14px);
	-webkit-backdrop-filter: blur(14px);
	border-bottom: 1px solid transparent;
	transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.scrolled { background: rgba(20, 20, 20, 0.88); border-bottom-color: var(--line); }

.header-inner { display: flex; align-items: center; gap: 2rem; padding: 0.9rem 0; }

.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; }

.brand-mark {
	height: 46px;
	width: auto;
	display: block;
}

.brand-name {
	font-family: var(--head);
	font-weight: 600;
	font-size: 0.95rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--ink);
	line-height: 1.25;
}
.brand-name em {
	display: block;
	font-style: normal;
	font-weight: 400;
	font-size: 0.62rem;
	letter-spacing: 0.42em;
	color: var(--gold);
}

.site-nav { display: flex; gap: 1.6rem; margin-left: auto; }
.site-nav a {
	font-family: var(--head);
	font-size: 0.8rem;
	font-weight: 400;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--ink-dim);
	text-decoration: none;
	transition: color 0.2s ease;
}
.site-nav a:hover { color: var(--gold-bright); }

.btn-nav { font-size: 0.72rem; padding: 0.7em 1.4em; white-space: nowrap; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 6px; margin-left: auto; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--gold); margin: 5px 0; border-radius: 2px; }

/* ------------------------------- hero ----------------------------------- */

.hero {
	position: relative;
	padding: 9.5rem 0 6rem;
	background:
		radial-gradient(ellipse 90% 65% at 50% -10%, rgba(216, 182, 94, 0.14), transparent 60%),
		radial-gradient(ellipse 70% 50% at 50% 30%, #232323, transparent 75%),
		var(--bg);
	text-align: center;
}

.hero-logo {
	width: min(480px, 78vw);
	margin: 0 auto 1.6rem;
	-webkit-mask-image: radial-gradient(ellipse 62% 58% at 50% 50%, #000 46%, transparent 72%);
	mask-image: radial-gradient(ellipse 62% 58% at 50% 50%, #000 46%, transparent 72%);
}

.hero h1 { max-width: 21ch; margin: 0 auto; }

.hero-cta {
	display: flex;
	flex-wrap: wrap;
	gap: 1rem;
	justify-content: center;
	margin-top: 2.4rem;
}

/* ------------------------------ sections -------------------------------- */

.section { padding: 5.5rem 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid rgba(255,255,255,0.04); border-bottom: 1px solid rgba(255,255,255,0.04); }

/* --------------------------- entry points ------------------------------- */

.entry-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 1.6rem;
	margin-top: 2.6rem;
}

.entry-card {
	display: block;
	background: var(--bg-card);
	border: 1px solid var(--line);
	border-radius: var(--radius);
	padding: 2.4rem 2.2rem;
	text-decoration: none;
	color: var(--ink);
	transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.entry-card:hover {
	transform: translateY(-4px);
	border-color: var(--gold);
	box-shadow: 0 18px 44px rgba(0, 0, 0, 0.45);
}

.entry-access {
	font-family: var(--head);
	font-size: 0.68rem;
	font-weight: 600;
	letter-spacing: 0.24em;
	text-transform: uppercase;
	color: var(--gold);
	margin-bottom: 1.1rem;
}

.entry-card h3 { font-size: 1.7rem; font-weight: 700; margin-bottom: 0.9rem; }

.entry-desc { color: var(--ink-dim); font-size: 0.95rem; }

.entry-link {
	display: inline-block;
	margin-top: 1.5rem;
	font-family: var(--head);
	font-size: 0.8rem;
	font-weight: 600;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--gold-bright);
}
.entry-link .arr { transition: transform 0.25s ease; display: inline-block; }
.entry-card:hover .entry-link .arr { transform: translateX(4px); }

/* -------------------------- strategic matrix ---------------------------- */

.matrix-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 2.8rem 3.2rem;
	margin-top: 2.8rem;
}

.matrix-num {
	display: block;
	font-family: var(--head);
	font-size: 2.6rem;
	font-weight: 700;
	line-height: 1;
	background: var(--gold-grad);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
	margin-bottom: 0.8rem;
}

.matrix-item h3 { margin-bottom: 0.7rem; }
.matrix-item p { color: var(--ink-dim); font-size: 0.97rem; }

/* ------------------------------ keynote --------------------------------- */

.keynote-inner {
	display: grid;
	grid-template-columns: minmax(260px, 380px) 1fr;
	gap: 3.2rem;
	align-items: center;
}

.keynote-photo img {
	border-radius: var(--radius);
	border: 1px solid var(--line);
}

.keynote-copy p:not(.eyebrow) { color: var(--ink-dim); max-width: 48ch; }
.keynote-copy .btn { margin-top: 1.8rem; }

/* ----------------------------- footprint -------------------------------- */

.footprint { text-align: center; }
.footprint h2 { max-width: 30ch; margin-inline: auto; }

.cred-strip {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 0.9rem 2.6rem;
	margin-top: 2.4rem;
}
.cred-strip span {
	font-family: var(--head);
	font-size: 0.82rem;
	font-weight: 400;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: var(--ink-dim);
	white-space: nowrap;
}
.cred-strip span::before { content: "\2726"; color: var(--gold); margin-right: 0.7rem; font-size: 0.7em; }

/* ------------------------------ gallery --------------------------------- */

.gallery {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
	gap: 1.2rem;
	margin-top: 2.6rem;
}

.gallery figure {
	position: relative;
	border-radius: var(--radius);
	overflow: hidden;
	border: 1px solid rgba(255, 255, 255, 0.06);
	aspect-ratio: 4 / 3;
	background: var(--bg-card);
}

.gallery img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.5s ease;
}
.gallery figure:hover img { transform: scale(1.05); }

.gallery figcaption {
	position: absolute;
	inset: auto 0 0 0;
	padding: 2.2rem 1rem 0.9rem;
	background: linear-gradient(to top, rgba(10, 10, 10, 0.92), transparent);
	font-size: 0.78rem;
	letter-spacing: 0.04em;
	color: var(--ink);
}

/* ------------------------------ contact --------------------------------- */

.contact-inner { text-align: center; }
.contact-sub { color: var(--ink-dim); max-width: 52ch; margin: 0 auto; }
.contact .hero-cta { margin-top: 2.2rem; }

.contact-social { display: flex; justify-content: center; gap: 2.2rem; margin-top: 2.6rem; }
.contact-social a {
	font-family: var(--head);
	font-size: 0.8rem;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--ink-dim);
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.2s ease, border-color 0.2s ease;
}
.contact-social a:hover { color: var(--gold-bright); border-bottom-color: var(--gold); }

/* ------------------------------- footer --------------------------------- */

.site-footer {
	padding: 2.6rem 0;
	border-top: 1px solid rgba(255, 255, 255, 0.06);
	background: #101010;
}

.footer-inner { text-align: center; }

.footer-links { display: flex; justify-content: center; gap: 2rem; margin-bottom: 1.1rem; }
.footer-links a {
	font-family: var(--head);
	font-size: 0.75rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--gold);
	text-decoration: none;
}
.footer-links a:hover { color: var(--gold-bright); }

.footer-inner p { font-size: 0.8rem; color: var(--ink-dim); }

/* ------------------------------- reveal ---------------------------------- */

.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	.reveal { opacity: 1; transform: none; transition: none; }
}

/* ------------------------------ responsive ------------------------------- */

@media (max-width: 860px) {
	.site-nav {
		position: absolute;
		top: 100%;
		left: 0;
		right: 0;
		flex-direction: column;
		gap: 0;
		background: rgba(16, 16, 16, 0.97);
		border-bottom: 1px solid var(--line);
		display: none;
	}
	.site-nav.open { display: flex; }
	.site-nav a { padding: 1rem 5%; border-top: 1px solid rgba(255, 255, 255, 0.05); }
	.nav-toggle { display: block; }
	.btn-nav { display: none; }

	.keynote-inner { grid-template-columns: 1fr; }
	.keynote-photo { max-width: 420px; }

	.section { padding: 4rem 0; }
	.hero { padding: 8rem 0 4.5rem; }
}