/* ==========================================================================
SterlingPRIVATE.ai — Site Stylesheet
Single source of truth for all pages. Drop into with:
========================================================================== */
/* --------------------------------------------------------------------------
1. Design tokens
-------------------------------------------------------------------------- */
:root {
/* Color — dark, technical, calm */
--bg: #0b0d10; /* page background */
--bg-elev-1: #111418; /* cards, raised surfaces */
--bg-elev-2: #161a1f; /* hover / inset */
--bg-header: rgba(11, 13, 16, 0.78);
--fg: #e8eaed; /* primary text */
--fg-muted: #9aa0a6; /* secondary text */
--fg-subtle: #6b7077; /* tertiary text, captions */
--line: #1f242a; /* hairlines / dividers */
--line-strong: #2a3038; /* emphasized borders */
--accent: oklch(72% 0.11 175); /* desaturated teal — AI / signal */
--accent-soft: oklch(72% 0.11 175 / 0.14);
--accent-fg: #06120f; /* ink on accent buttons */
--warn: oklch(78% 0.10 75);
--danger: oklch(68% 0.14 25);
/* Type */
--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
Roboto, Helvetica, Arial, sans-serif;
--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
Consolas, monospace;
--fs-xs: 0.75rem; /* 12 */
--fs-sm: 0.875rem; /* 14 */
--fs-base: 1rem; /* 16 */
--fs-md: 1.125rem; /* 18 */
--fs-lg: 1.375rem; /* 22 */
--fs-xl: 1.75rem; /* 28 */
--fs-2xl: 2.25rem; /* 36 */
--fs-3xl: 3rem; /* 48 */
--fs-4xl: 4rem; /* 64 */
--lh-tight: 1.1;
--lh-snug: 1.25;
--lh-normal: 1.5;
--lh-loose: 1.7;
--tracking-tight: -0.02em;
--tracking-wide: 0.08em;
/* Spacing — 4px base */
--s-1: 0.25rem;
--s-2: 0.5rem;
--s-3: 0.75rem;
--s-4: 1rem;
--s-5: 1.5rem;
--s-6: 2rem;
--s-7: 3rem;
--s-8: 4rem;
--s-9: 6rem;
--s-10: 8rem;
/* Radii */
--r-sm: 4px;
--r-md: 8px;
--r-lg: 12px;
--r-xl: 20px;
--r-pill: 999px;
/* Layout */
--container: 1200px;
--container-narrow: 880px;
/* Motion */
--ease: cubic-bezier(0.4, 0, 0.2, 1);
--dur-fast: 120ms;
--dur: 200ms;
--dur-slow: 400ms;
/* Elevation (subtle — dark UI) */
--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
--shadow: 0 4px 12px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
--shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
}
/* --------------------------------------------------------------------------
2. Reset / base
-------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html {
-webkit-text-size-adjust: 100%;
scroll-behavior: smooth;
background: var(--bg-header);
}
body {
margin: 0;
padding-top: 24px;
background: var(--bg);
color: var(--fg);
font-family: var(--font-sans);
font-size: var(--fs-base);
line-height: var(--lh-normal);
font-feature-settings: "ss01", "cv11";
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-rendering: optimizeLegibility;
min-height: 100vh;
display: flex;
flex-direction: column;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a {
color: var(--fg);
text-decoration: none;
transition: color var(--dur) var(--ease);
}
a:hover { color: var(--accent); }
::selection { background: var(--accent-soft); color: var(--fg); }
/* --------------------------------------------------------------------------
3. Typography
-------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
margin: 0 0 var(--s-4);
font-weight: 600;
line-height: var(--lh-tight);
letter-spacing: var(--tracking-tight);
color: var(--fg);
text-wrap: balance;
}
h1 { font-size: clamp(2.25rem, 5vw, var(--fs-4xl)); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 3.5vw, var(--fs-3xl)); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); font-weight: 600; }
h5 { font-size: var(--fs-md); }
h6 { font-size: var(--fs-base); text-transform: uppercase; letter-spacing: var(--tracking-wide); color: var(--fg-muted); }
p { margin: 0 0 var(--s-4); text-wrap: pretty; }
p:last-child { margin-bottom: 0; }
.lead {
font-size: var(--fs-md);
color: var(--fg-muted);
line-height: var(--lh-loose);
max-width: 60ch;
}
.eyebrow {
display: inline-flex;
align-items: center;
gap: var(--s-2);
font-family: var(--font-mono);
font-size: var(--fs-xs);
text-transform: uppercase;
letter-spacing: var(--tracking-wide);
color: var(--accent);
margin-bottom: var(--s-4);
}
.eyebrow::before {
content: "";
width: 24px; height: 1px;
background: var(--accent);
display: inline-block;
}
.muted { color: var(--fg-muted); }
.subtle { color: var(--fg-subtle); }
.mono { font-family: var(--font-mono); }
.small { font-size: var(--fs-sm); }
em { color: var(--fg); font-style: normal; border-bottom: 1px dotted var(--accent); padding-bottom: 1px; }
strong { color: var(--fg); font-weight: 600; }
/* --------------------------------------------------------------------------
3a. Brand mark — "SterlingPRIVATE.ai"
-------------------------------------------------------------------------- */
/*
Use anywhere in copy:
(auto-fills correct text)
SterlingPRIVATE.ai (also fine — JS will normalize)
The class enforces casing visually (PRIVATE is set to uppercase via styling
on its own span, so even if someone types "sterlingprivate.ai" lowercase
it'll still render correctly). The included script in includes.js / inline
script auto-wraps the markup so authors don't have to nest spans by hand.
*/
.brand {
font-weight: 600;
color: var(--fg);
white-space: nowrap;
letter-spacing: 0;
}
.brand__sterling { font-weight: 500; }
.brand__private { font-weight: 700; text-transform: uppercase; letter-spacing: 0.02em; }
.brand__tld { font-weight: 500; color: var(--fg-muted); }
/* When inside a heading, inherit size/weight but keep the structural casing */
h1 .brand, h2 .brand, h3 .brand { font-weight: inherit; }
h1 .brand__private, h2 .brand__private, h3 .brand__private { font-weight: 800; }
/* --------------------------------------------------------------------------
4. Layout primitives
-------------------------------------------------------------------------- */
.container {
width: 100%;
max-width: var(--container);
margin: 0 auto;
padding-left: var(--s-5);
padding-right: var(--s-5);
}
.container-narrow {
width: 100%;
max-width: var(--container-narrow);
margin: 0 auto;
padding-left: var(--s-5);
padding-right: var(--s-5);
}
.section {
padding: var(--s-9) 0;
border-top: 1px solid var(--line);
}
.section:first-of-type { border-top: 0; }
.section-tight { padding: var(--s-7) 0; }
.stack > * + * { margin-top: var(--s-4); }
.stack-lg > * + * { margin-top: var(--s-6); }
.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-split {
grid-template-columns: 1fr;
gap: var(--s-7);
align-items: center;
}
@media (min-width: 880px) {
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-split { grid-template-columns: 1.1fr 0.9fr; }
}
.flex { display: flex; gap: var(--s-4); }
.flex-center { display: flex; align-items: center; gap: var(--s-3); }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); }
.flex-wrap { flex-wrap: wrap; }
main { flex: 1; }
/* --------------------------------------------------------------------------
5. Header / nav
-------------------------------------------------------------------------- */
.site-header {
position: sticky;
top: 0;
z-index: 50;
background: var(--bg-header);
backdrop-filter: saturate(150%) blur(14px);
-webkit-backdrop-filter: saturate(150%) blur(14px);
border-bottom: 1px solid var(--line);
}
.site-header__inner {
max-width: var(--container);
margin: 0 auto;
padding: var(--s-3) var(--s-5);
display: flex;
align-items: center;
gap: var(--s-5);
}
.site-header__brand {
display: flex;
align-items: center;
gap: var(--s-3);
flex-shrink: 0;
color: var(--fg);
}
.site-header__brand:hover { color: var(--fg); }
.site-header__logo {
height: 83px;
width: auto;
/* Show the logo in its original colors. The teal + yellow read well on the dark header. */
}
.site-header__wordmark {
font-family: var(--font-sans);
font-size: var(--fs-md);
letter-spacing: 0;
text-transform: none;
color: var(--fg);
border-left: 1px solid var(--line-strong);
padding-left: var(--s-3);
}
.site-header__wordmark strong { color: var(--fg); font-weight: 700; }
.site-nav {
display: flex;
align-items: center;
gap: var(--s-1);
margin-left: auto;
}
.site-nav__link {
display: inline-flex;
align-items: center;
padding: var(--s-2) var(--s-3);
font-size: var(--fs-sm);
color: var(--fg-muted);
border-radius: var(--r-sm);
transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-nav__link:hover {
color: var(--fg);
background: var(--bg-elev-1);
}
.site-nav__link.is-active {
color: var(--accent);
background: var(--accent-soft);
}
.site-nav__link.is-active:hover {
color: var(--accent);
background: var(--accent-soft);
}
.site-nav__cta {
margin-left: var(--s-3);
}
.site-nav__toggle {
display: none;
background: none;
border: 1px solid var(--line-strong);
border-radius: var(--r-sm);
color: var(--fg);
padding: var(--s-2);
cursor: pointer;
}
@media (max-width: 880px) {
.site-header__wordmark { display: none; }
.site-nav__toggle { display: inline-flex; margin-left: auto; }
.site-nav {
display: none;
position: absolute;
top: 100%; left: 0; right: 0;
flex-direction: column;
align-items: stretch;
gap: 0;
padding: var(--s-3);
background: var(--bg);
border-bottom: 1px solid var(--line);
}
.site-nav.is-open { display: flex; }
.site-nav__link { padding: var(--s-3); border-radius: var(--r-md); }
.site-nav__link.is-active { background: var(--accent-soft); color: var(--accent); }
.site-nav__cta { margin: var(--s-2) 0 0; }
}
/* --------------------------------------------------------------------------
6. Footer
-------------------------------------------------------------------------- */
.site-footer {
margin-top: var(--s-10);
border-top: 1px solid var(--line);
background: var(--bg);
padding: var(--s-7) 0 var(--s-6);
font-size: var(--fs-sm);
color: var(--fg-muted);
}
.site-footer__top {
display: grid;
grid-template-columns: 1.4fr 1fr 1fr 1fr;
gap: var(--s-6);
margin-bottom: var(--s-7);
}
@media (max-width: 880px) {
.site-footer__top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
.site-footer__top { grid-template-columns: 1fr; }
}
.site-footer h4 {
font-family: var(--font-mono);
font-size: var(--fs-xs);
text-transform: uppercase;
letter-spacing: var(--tracking-wide);
color: var(--fg-subtle);
margin-bottom: var(--s-4);
font-weight: 500;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: var(--s-2); }
.site-footer a { color: var(--fg-muted); }
.site-footer a:hover { color: var(--accent); }
.site-footer__brand {
display: flex; align-items: center; gap: var(--s-3);
margin-bottom: var(--s-4);
}
.site-footer__brand img { height: 32px; opacity: 0.95; }
.site-footer__tagline {
font-family: var(--font-mono);
font-size: var(--fs-xs);
color: var(--fg-subtle);
letter-spacing: 0.02em;
line-height: var(--lh-loose);
max-width: 32ch;
}
.site-footer__bottom {
display: flex;
justify-content: space-between;
align-items: center;
flex-wrap: wrap;
gap: var(--s-3);
padding-top: var(--s-5);
border-top: 1px solid var(--line);
font-family: var(--font-mono);
font-size: var(--fs-xs);
color: var(--fg-subtle);
}
.site-footer__legal { display: flex; gap: var(--s-4); flex-wrap: wrap; }
/* --------------------------------------------------------------------------
7. Buttons
-------------------------------------------------------------------------- */
.btn {
display: inline-flex;
align-items: center;
gap: var(--s-2);
padding: var(--s-3) var(--s-5);
font-family: var(--font-sans);
font-size: var(--fs-sm);
font-weight: 500;
line-height: 1;
border-radius: var(--r-md);
border: 1px solid transparent;
cursor: pointer;
transition: all var(--dur) var(--ease);
text-decoration: none;
white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn--primary {
background: var(--accent);
color: var(--accent-fg);
border-color: var(--accent);
}
.btn--primary:hover {
background: oklch(78% 0.11 175);
color: var(--accent-fg);
transform: translateY(-1px);
box-shadow: var(--shadow);
}
.btn--secondary {
background: transparent;
color: var(--fg);
border-color: var(--line-strong);
}
.btn--secondary:hover {
background: var(--bg-elev-1);
border-color: var(--accent);
color: var(--fg);
}
.btn--ghost {
background: transparent;
color: var(--fg-muted);
padding-left: var(--s-3); padding-right: var(--s-3);
}
.btn--ghost:hover { color: var(--fg); background: var(--bg-elev-1); }
.btn--lg { padding: var(--s-4) var(--s-6); font-size: var(--fs-base); }
.btn--sm { padding: var(--s-2) var(--s-3); font-size: var(--fs-xs); }
.btn .arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }
/* --------------------------------------------------------------------------
8. Cards & surfaces
-------------------------------------------------------------------------- */
.card {
background: var(--bg-elev-1);
border: 1px solid var(--line);
border-radius: var(--r-lg);
padding: var(--s-6);
transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card:hover { border-color: var(--line-strong); }
.card--feature .card__icon {
width: 40px; height: 40px;
border-radius: var(--r-md);
background: var(--accent-soft);
color: var(--accent);
display: inline-flex; align-items: center; justify-content: center;
margin-bottom: var(--s-4);
border: 1px solid color-mix(in oklch, var(--accent), transparent 70%);
}
.card h3 { font-size: var(--fs-md); margin-bottom: var(--s-2); }
.card p { color: var(--fg-muted); font-size: var(--fs-sm); line-height: var(--lh-loose); }
/* Pill / badge */
.pill {
display: inline-flex;
align-items: center;
gap: var(--s-2);
padding: var(--s-1) var(--s-3);
font-family: var(--font-mono);
font-size: var(--fs-xs);
text-transform: uppercase;
letter-spacing: var(--tracking-wide);
color: var(--fg-muted);
background: var(--bg-elev-1);
border: 1px solid var(--line);
border-radius: var(--r-pill);
}
.pill__dot {
width: 6px; height: 6px; border-radius: 50%;
background: var(--accent);
box-shadow: 0 0 0 3px var(--accent-soft);
}
/* --------------------------------------------------------------------------
9. Hero
-------------------------------------------------------------------------- */
.hero {
position: relative;
overflow: hidden;
padding: var(--s-3) 0 var(--s-8);
}
.hero::before {
/* subtle technical grid backdrop */
content: "";
position: absolute;
inset: 0;
background-image:
linear-gradient(var(--line) 1px, transparent 1px),
linear-gradient(90deg, var(--line) 1px, transparent 1px);
background-size: 64px 64px;
background-position: -1px -1px;
mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%);
-webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%);
opacity: 0.6;
pointer-events: none;
}
.hero::after {
/* faint accent glow */
content: "";
position: absolute;
top: -20%; right: -10%;
width: 60vw; height: 60vw;
background: radial-gradient(circle, var(--accent-soft) 0%, transparent 60%);
opacity: 0.5;
pointer-events: none;
}
.hero__inner {
position: relative;
z-index: 1;
}
.hero h1 {
max-width: 18ch;
margin-bottom: var(--s-5);
}
.hero .lead {
font-size: var(--fs-lg);
max-width: 56ch;
margin-bottom: var(--s-6);
}
.hero__actions { display: flex; gap: var(--s-3); flex-wrap: wrap; }
.hero__visual {
position: relative;
background: var(--bg-elev-1);
border: 1px solid var(--line);
border-radius: var(--r-xl);
padding: var(--s-5);
aspect-ratio: 4 / 3;
overflow: hidden;
}
.hero__visual img {
width: 100%; height: 100%;
object-fit: contain;
}
.hero__illustration {
width: 100%; height: 100%;
display: block;
}
/* --------------------------------------------------------------------------
10. Image placeholder (when real assets aren't ready)
-------------------------------------------------------------------------- */
.placeholder {
display: flex;
align-items: center;
justify-content: center;
text-align: center;
background:
repeating-linear-gradient(
135deg,
var(--bg-elev-1) 0 12px,
var(--bg-elev-2) 12px 24px
);
border: 1px solid var(--line);
border-radius: var(--r-lg);
color: var(--fg-subtle);
font-family: var(--font-mono);
font-size: var(--fs-xs);
text-transform: uppercase;
letter-spacing: var(--tracking-wide);
padding: var(--s-6);
aspect-ratio: 16 / 10;
}
/* --------------------------------------------------------------------------
11. Stats / number rows
-------------------------------------------------------------------------- */
.stat-row {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
gap: var(--s-5);
padding: var(--s-6) 0;
border-top: 1px solid var(--line);
border-bottom: 1px solid var(--line);
}
.stat__value {
font-family: var(--font-mono);
font-size: var(--fs-2xl);
font-weight: 500;
color: var(--fg);
letter-spacing: var(--tracking-tight);
line-height: 1;
margin-bottom: var(--s-2);
}
.stat__label {
font-size: var(--fs-xs);
text-transform: uppercase;
letter-spacing: var(--tracking-wide);
color: var(--fg-subtle);
font-family: var(--font-mono);
}
/* --------------------------------------------------------------------------
12. CTA banner
-------------------------------------------------------------------------- */
.cta-banner {
background: var(--bg-elev-1);
border: 1px solid var(--line);
border-radius: var(--r-xl);
padding: var(--s-8) var(--s-6);
text-align: center;
position: relative;
overflow: hidden;
}
.cta-banner::before {
content: "";
position: absolute;
inset: 0;
background: radial-gradient(ellipse 60% 80% at 50% 0%, var(--accent-soft) 0%, transparent 60%);
pointer-events: none;
}
.cta-banner > * { position: relative; }
.cta-banner h2 { margin-bottom: var(--s-3); }
.cta-banner .lead { margin: 0 auto var(--s-6); }
/* --------------------------------------------------------------------------
13. Utility
-------------------------------------------------------------------------- */
.text-center { text-align: center; }
.center { margin-left: auto; margin-right: auto; }
.hidden { display: none !important; }
.sr-only {
position: absolute; width: 1px; height: 1px;
padding: 0; margin: -1px; overflow: hidden;
clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.divider {
height: 1px;
background: var(--line);
border: 0;
margin: var(--s-6) 0;
}
/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after {
transition-duration: 0.01ms !important;
animation-duration: 0.01ms !important;
scroll-behavior: auto !important;
}
}