/* ─── UVUMBUZI · Design System ────────────────────────────────────────── */
:root {
  --ink: #0e0e0e; --ink-2: #1c1c1c; --ink-3: #2e2e2e;
  --smoke: #5a5a5a; --fog: #9a9a9a; --dust: #d4d0c8;
  --parchment: #f5f3ee; --paper: #faf9f6; --white: #ffffff;
  --amber: #c49a1a; --amber-2: #e8b420;
  --grove: #152e1f; --rust: #7a3a1a; --indigo: #2c4a6e; --plum: #5a3d6e;
  --f-serif: 'Playfair Display', Georgia, serif;
  --f-sans: 'Instrument Sans', system-ui, sans-serif;
  --f-mono: 'IBM Plex Mono', monospace;
  --max: 1280px; --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--f-sans); background: var(--paper); color: var(--ink); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--f-sans); cursor: pointer; border: none; background: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 2.5rem; }
.t-mono { font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--amber); }
.t-mono-d { font-family: var(--f-mono); font-size: 0.62rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--smoke); }

.btn { display: inline-flex; align-items: center; gap: 0.6rem; font-family: var(--f-mono); font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; padding: 0.95rem 2.2rem; transition: all 0.2s var(--ease); cursor: pointer; text-decoration: none; border: none; }
.btn-dark { background: var(--ink); color: var(--white); }
.btn-dark:hover { background: var(--ink-3); transform: translateY(-2px); }
.btn-amber { background: var(--amber); color: var(--white); }
.btn-amber:hover { background: var(--amber-2); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--white); border: 1px solid rgba(255,255,255,0.3); }
.btn-ghost:hover { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.6); }
.btn-ghost-d { background: transparent; color: var(--ink); border: 1px solid var(--dust); }
.btn-ghost-d:hover { background: var(--ink); color: var(--white); border-color: var(--ink); }

/* ── NAV ── */
#nav { position: fixed; top: 0; left: 0; right: 0; z-index: 900; height: 72px; display: flex; align-items: center; transition: background 0.3s, border-color 0.3s; border-bottom: 1px solid transparent; }
#nav.scrolled, #nav.solid { background: rgba(250,249,246,0.96); border-color: var(--dust); backdrop-filter: blur(16px); }
.nav-wrap { max-width: var(--max); margin: 0 auto; padding: 0 2.5rem; width: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; flex-direction: column; gap: 2px; }
.logo-name { font-family: var(--f-serif); font-size: 1.55rem; font-weight: 700; letter-spacing: 0.08em; color: var(--white); transition: color 0.3s; line-height: 1; }
#nav.scrolled .logo-name, #nav.solid .logo-name { color: var(--ink); }
.logo-sub { font-family: var(--f-mono); font-size: 0.52rem; letter-spacing: 0.25em; text-transform: uppercase; color: var(--amber); line-height: 1; }
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a { font-family: var(--f-mono); font-size: 0.62rem; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(255,255,255,0.65); transition: color 0.2s; }
#nav.scrolled .nav-links a, #nav.solid .nav-links a { color: var(--smoke); }
.nav-links a:hover, .nav-links a.active { color: var(--white) !important; }
#nav.scrolled .nav-links a:hover, #nav.solid .nav-links a:hover, #nav.scrolled .nav-links a.active, #nav.solid .nav-links a.active { color: var(--ink) !important; }
.nav-cta { font-family: var(--f-mono); font-size: 0.62rem; letter-spacing: 0.15em; text-transform: uppercase; padding: 0.6rem 1.3rem; background: var(--amber); color: var(--white) !important; transition: background 0.2s; }
.nav-cta:hover { background: var(--amber-2); color: var(--white) !important; }

/* ── PAGE HEADER ── */
.page-header { background: var(--ink); color: var(--white); padding: 9rem 0 5rem; position: relative; overflow: hidden; }
.page-header-arcs { position: absolute; inset: 0; pointer-events: none; opacity: 0.6; }
.page-header-arc { position: absolute; right: -8%; top: 50%; transform: translateY(-50%); border-radius: 50%; border: 1px solid rgba(196,154,26,0.05); }
.page-header-arc.a1 { width: 60vw; height: 60vw; max-width: 800px; max-height: 800px; }
.page-header-arc.a2 { width: 42vw; height: 42vw; }
.page-header-arc.a3 { width: 26vw; height: 26vw; }
.page-header .wrap { position: relative; z-index: 2; }
.page-crumb { font-family: var(--f-mono); font-size: 0.62rem; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255,255,255,0.4); margin-bottom: 1.5rem; display: flex; gap: 0.75rem; align-items: center; }
.page-crumb a { color: rgba(255,255,255,0.4); transition: color 0.2s; }
.page-crumb a:hover { color: var(--amber); }
.page-crumb .sep { color: rgba(255,255,255,0.2); }
.page-h { font-family: var(--f-serif); font-size: clamp(2.6rem, 5.5vw, 4.8rem); font-weight: 400; line-height: 1.0; letter-spacing: -0.025em; margin-bottom: 1.5rem; max-width: 900px; }
.page-h em { font-style: italic; color: var(--amber); }
.page-lede { font-size: 1.05rem; font-weight: 300; line-height: 1.75; color: rgba(255,255,255,0.55); max-width: 640px; }

/* ── SECTION ── */
.section { padding: 7rem 0; }
.section-md { padding: 5rem 0; }
.sec-head { display: grid; grid-template-columns: 1fr 1.3fr; gap: 5rem; align-items: end; margin-bottom: 4rem; padding-bottom: 2.5rem; border-bottom: 1px solid var(--dust); }
.sec-h { font-family: var(--f-serif); font-size: clamp(2rem, 4vw, 3.4rem); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; color: var(--ink); }
.sec-h em { font-style: italic; color: var(--amber); }
.sec-intro { font-size: 1rem; font-weight: 300; line-height: 1.85; color: var(--smoke); }

/* ── FOOTER ── */
.foot { background: #060606; color: rgba(255,255,255,0.5); padding: 3rem 0 2rem; border-top: 1px solid rgba(255,255,255,0.08); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem; padding-bottom: 2rem; border-bottom: 1px solid rgba(255,255,255,0.06); }
.foot-brand .n { font-family: var(--f-serif); font-size: 1.3rem; font-weight: 700; letter-spacing: 0.08em; color: var(--white); margin-bottom: 0.4rem; }
.foot-brand p { font-size: 0.82rem; line-height: 1.65; max-width: 380px; font-weight: 300; }
.foot-h { font-family: var(--f-mono); font-size: 0.58rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--amber); margin-bottom: 0.85rem; }
.foot-link { display: block; font-size: 0.82rem; padding: 0.3rem 0; transition: color 0.2s; }
.foot-link:hover { color: var(--white); }
.foot-bot { display: flex; justify-content: space-between; padding-top: 2rem; font-family: var(--f-mono); font-size: 0.55rem; letter-spacing: 0.18em; text-transform: uppercase; color: rgba(255,255,255,0.3); }

@media (max-width: 920px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .sec-head { grid-template-columns: 1fr; gap: 1.5rem; }
  .foot-grid { grid-template-columns: 1fr; }
  .section { padding: 4rem 0; }
}