/* ==========================================================================
   SSD CLAD Tech — brand system derived from the logo
   Blue  #0253A5 (gear half)   Ink #0B0E14 (atom half)   White (disc)
   ========================================================================== */

:root {
	--blue: #0253a5;
	--blue-dark: #023c78;
	--blue-tint: #e9f0f9;
	--blue-tint-2: #d4e3f4;

	--ink: #0b0e14;
	--text: #3f4a5a;
	--muted: #6b7688;

	--white: #ffffff;
	--surface: #f5f8fc;
	--line: #e2e8f1;

	--shell: 1180px;
	--radius: 18px;
	--radius-sm: 10px;

	--shadow-sm: 0 1px 2px rgba(11, 14, 20, .06), 0 8px 24px -16px rgba(11, 14, 20, .3);
	--shadow-md: 0 24px 60px -32px rgba(2, 83, 165, .45);

	--font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
	--font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

	--ease: cubic-bezier(.2, .7, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 92px; }

body {
	margin: 0;
	background: var(--white);
	color: var(--text);
	font-family: var(--font-body);
	font-size: 17px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
	font-family: var(--font-display);
	color: var(--ink);
	line-height: 1.1;
	letter-spacing: -.02em;
	margin: 0 0 .5em;
}

h1 { font-size: clamp(2.4rem, 5.2vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); font-weight: 600; }
h3 { font-size: 1.18rem; font-weight: 600; letter-spacing: -.01em; }
p { margin: 0 0 1rem; }
a { color: var(--blue); text-decoration: none; }

.shell { width: min(100% - 2.5rem, var(--shell)); margin-inline: auto; }

.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;
}

.skip-link {
	position: absolute; left: 1rem; top: -4rem; z-index: 200;
	background: var(--ink); color: #fff; padding: .7rem 1.1rem;
	border-radius: 0 0 var(--radius-sm) var(--radius-sm); transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

/* --------------------------------------------------------------- buttons */
.btn {
	display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
	font-family: var(--font-display); font-weight: 600; font-size: .97rem;
	padding: .82rem 1.6rem; border-radius: 999px; border: 1.5px solid transparent;
	transition: transform .18s var(--ease), background-color .18s var(--ease),
	            color .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
	cursor: pointer; white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn-solid { background: var(--blue); color: #fff; box-shadow: 0 12px 28px -14px rgba(2, 83, 165, .8); }
.btn-solid:hover { background: var(--blue-dark); }

.btn-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

.btn-light { background: #fff; color: var(--blue); }
.btn-light:hover { background: var(--blue-tint); }

/* ---------------------------------------------------------------- header */
.site-header {
	position: sticky; top: 0; z-index: 100;
	background: rgba(255, 255, 255, .88);
	backdrop-filter: saturate(160%) blur(12px);
	border-bottom: 1px solid transparent;
	transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.is-stuck { border-color: var(--line); box-shadow: 0 6px 24px -20px rgba(11, 14, 20, .8); }

.header-inner { display: flex; align-items: center; gap: 1rem; min-height: 74px; }

.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--ink); }
.brand-mark { width: 42px; height: 42px; flex: none; }
.brand-text { display: grid; font-family: var(--font-display); line-height: 1.05; }
.brand-text strong { font-size: 1.05rem; font-weight: 700; letter-spacing: .01em; }
.brand-text em {
	font-style: normal; font-size: .68rem; font-weight: 500;
	letter-spacing: .34em; text-transform: uppercase; color: var(--blue);
}

.primary-nav { margin-left: auto; display: flex; align-items: center; gap: .35rem; }
.primary-nav a {
	position: relative; padding: .5rem .85rem; border-radius: 999px;
	color: var(--text); font-weight: 500; font-size: .95rem;
	transition: color .18s var(--ease), background-color .18s var(--ease);
}
.primary-nav a:not(.nav-cta):hover { color: var(--ink); background: var(--surface); }
.primary-nav a.is-active:not(.nav-cta) { color: var(--blue); background: var(--blue-tint); }
.primary-nav a.nav-cta { margin-left: .6rem; color: #fff; }

.nav-toggle {
	margin-left: auto; display: none; width: 46px; height: 42px;
	background: #fff; border: 1.5px solid var(--line); border-radius: 12px; cursor: pointer;
}
.nav-toggle-bars, .nav-toggle-bars::before, .nav-toggle-bars::after {
	display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
	margin-inline: auto; transition: transform .22s var(--ease), opacity .18s var(--ease);
}
.nav-toggle-bars { position: relative; }
.nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

/* ------------------------------------------------------------------ hero */
.hero { position: relative; overflow: hidden; padding: clamp(3rem, 7vw, 6rem) 0 clamp(3.5rem, 8vw, 6.5rem); }
.hero::before {
	content: ""; position: absolute; inset: 0;
	background:
		radial-gradient(60rem 40rem at 82% -10%, var(--blue-tint) 0%, transparent 62%),
		radial-gradient(40rem 30rem at -5% 15%, #f3f6fb 0%, transparent 60%);
	z-index: -2;
}
.hero-grid-lines {
	position: absolute; inset: 0; z-index: -1; opacity: .5;
	background-image:
		linear-gradient(var(--line) 1px, transparent 1px),
		linear-gradient(90deg, var(--line) 1px, transparent 1px);
	background-size: 68px 68px;
	mask-image: radial-gradient(70% 60% at 50% 35%, #000 0%, transparent 100%);
	-webkit-mask-image: radial-gradient(70% 60% at 50% 35%, #000 0%, transparent 100%);
}

.hero-inner {
	display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
	gap: clamp(2rem, 5vw, 4rem); align-items: center;
}

.eyebrow {
	display: inline-flex; align-items: center; gap: .55rem;
	font-family: var(--font-display); font-size: .78rem; font-weight: 600;
	letter-spacing: .13em; text-transform: uppercase; color: var(--blue);
	background: #fff; border: 1px solid var(--blue-tint-2);
	padding: .42rem .95rem; border-radius: 999px; margin-bottom: 1.4rem;
}
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }

h1 .accent { color: var(--blue); }

.lede { font-size: 1.14rem; color: var(--muted); max-width: 34rem; }

.tagline-quote {
	font-family: var(--font-display); font-size: 1.05rem; color: var(--ink);
	border-left: 3px solid var(--blue); padding-left: 1rem; margin: 1.6rem 0 2rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }

/* hero artwork: the logo, taken apart and set in motion */
.hero-art { display: grid; place-items: center; }
.hero-art-stage {
	position: relative; width: min(100%, 440px); aspect-ratio: 1;
	display: grid; place-items: center;
}
.hero-art-stage > * { grid-area: 1 / 1; }

.art-gear { width: 100%; fill: var(--blue); opacity: .12; animation: spin 46s linear infinite; }
.art-atom { width: 84%; }
.art-orbits { stroke: var(--ink); opacity: .16; animation: spin 34s linear infinite reverse; }
.art-electron { fill: var(--blue); transform-origin: 0 0; }
.e1 { animation: orbit 7s linear infinite; }
.e2 { animation: orbit 7s linear infinite -2.33s; }
.e3 { animation: orbit 7s linear infinite -4.66s; }

.art-core {
	width: 44%; display: grid; place-items: center;
	background: #fff; border-radius: 50%; padding: 8%;
	box-shadow: var(--shadow-md);
	animation: float 7s ease-in-out infinite;
}
.art-core svg { width: 100%; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 50% { transform: translateY(-12px); } }
@keyframes orbit {
	from { transform: rotate(0deg) translateX(98px) rotate(0deg); }
	to   { transform: rotate(360deg) translateX(98px) rotate(-360deg); }
}

/* --------------------------------------------------------------- pillars */
.pillars { padding-bottom: clamp(2rem, 5vw, 3.5rem); }
.pillar-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.pillar {
	background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
	padding: 1.7rem 1.6rem; box-shadow: var(--shadow-sm);
	transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.pillar:hover { transform: translateY(-4px); border-color: var(--blue-tint-2); box-shadow: var(--shadow-md); }
.pillar p { margin: 0; color: var(--muted); font-size: .97rem; }

.pillar-icon { display: block; width: 40px; height: 40px; margin-bottom: 1.1rem; }
.pillar-icon svg { width: 100%; height: 100%; }
.gear-tone svg { fill: var(--blue); }
.atom-tone { color: var(--ink); }
.split-tone { color: var(--ink); }

/* -------------------------------------------------------------- sections */
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section-alt { background: var(--surface); border-block: 1px solid var(--line); }

.section-label {
	font-family: var(--font-display); font-size: .78rem; font-weight: 600;
	letter-spacing: .16em; text-transform: uppercase; color: var(--blue); margin-bottom: .7rem;
}
.section-label.light { color: #9ec6ee; }

.section-head { max-width: 44rem; margin-bottom: 2.6rem; }
.section-intro { color: var(--muted); font-size: 1.06rem; margin: 0; }

/* ----------------------------------------------------------------- about */
.about-grid {
	display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
	gap: clamp(2rem, 5vw, 3.5rem); align-items: start;
}
.about-grid p { color: var(--muted); }
.about-grid strong { color: var(--ink); }

.tick-list { list-style: none; padding: 0; margin: 1.6rem 0 0; display: grid; gap: .7rem; }
.tick-list li { position: relative; padding-left: 2rem; color: var(--text); }
.tick-list li::before {
	content: ""; position: absolute; left: 0; top: .35rem;
	width: 18px; height: 18px; border-radius: 50%;
	background: var(--blue-tint);
	box-shadow: inset 0 0 0 2px var(--blue);
}
.tick-list li::after {
	content: ""; position: absolute; left: 6px; top: .72rem;
	width: 6px; height: 6px; border-radius: 50%; background: var(--blue);
}

.about-card {
	background: var(--ink); color: #cdd6e4; border-radius: var(--radius);
	padding: 2rem 1.8rem; position: relative; overflow: hidden;
	box-shadow: var(--shadow-md);
}
.about-card::after {
	content: ""; position: absolute; right: -28%; bottom: -34%;
	width: 74%; aspect-ratio: 1; border-radius: 50%;
	background: radial-gradient(circle, rgba(2, 83, 165, .55) 0%, transparent 70%);
}
.about-card-head { display: flex; align-items: center; gap: .9rem; margin-bottom: 1.2rem; }
.about-card-head p { margin: 0; font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; color: #8fa3bd; }
.about-card-mark { width: 46px; height: 46px; flex: none; --mark-atom: #ffffff; --mark-disc: #0b0e14; --mark-gear: #2f8ae0; }
.about-card blockquote {
	margin: 0 0 1.6rem; font-family: var(--font-display); font-size: 1.32rem;
	line-height: 1.35; color: #fff;
}

.fact-list { display: grid; gap: .9rem; margin: 0; position: relative; }
.fact-list > div { display: grid; gap: .1rem; padding-top: .9rem; border-top: 1px solid rgba(255, 255, 255, .12); }
.fact-list dt { font-size: .76rem; letter-spacing: .14em; text-transform: uppercase; color: #8fa3bd; }
.fact-list dd { margin: 0; color: #fff; font-size: .98rem; }

/* ----------------------------------------------------------------- cards */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.card {
	position: relative; background: #fff; border: 1px solid var(--line);
	border-radius: var(--radius); padding: 1.8rem 1.6rem 1.6rem;
	transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
	overflow: hidden;
}
.card::before {
	content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 0;
	background: linear-gradient(90deg, var(--blue), var(--ink));
	transition: width .35s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--blue-tint-2); box-shadow: var(--shadow-md); }
.card:hover::before { width: 100%; }
.card-index {
	display: inline-block; font-family: var(--font-display); font-size: .8rem; font-weight: 600;
	letter-spacing: .1em; color: var(--blue); background: var(--blue-tint);
	padding: .2rem .6rem; border-radius: 999px; margin-bottom: 1rem;
}
.card p { margin: 0; color: var(--muted); font-size: .97rem; }

/* ----------------------------------------------------------------- steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; }
.step { position: relative; padding-top: 2.2rem; border-top: 2px solid var(--line); }
.step::before {
	content: ""; position: absolute; top: -7px; left: 0;
	width: 12px; height: 12px; border-radius: 50%; background: var(--blue);
	box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--blue-tint-2);
}
.step-num {
	display: block; font-family: var(--font-display); font-size: 2.4rem; font-weight: 700;
	line-height: 1; color: var(--blue-tint-2); margin-bottom: .5rem;
}
.step p { margin: 0; color: var(--muted); }

/* --------------------------------------------------------------- contact */
.cta-band {
	position: relative; overflow: hidden;
	background: linear-gradient(135deg, var(--ink) 0%, #10203a 48%, var(--blue-dark) 100%);
	color: #cfdcec; padding: clamp(3.5rem, 8vw, 5.5rem) 0;
}
.cta-band::before {
	content: ""; position: absolute; right: -12%; top: -40%;
	width: 46%; aspect-ratio: 1; border-radius: 50%;
	background: radial-gradient(circle, rgba(2, 83, 165, .5) 0%, transparent 68%);
}
.cta-band h2 { color: #fff; }
.contact-intro { color: #a9bdd6; max-width: 32rem; margin-bottom: 1.8rem; }

.contact-grid {
	position: relative; display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
	gap: clamp(2rem, 5vw, 3.5rem); align-items: start;
}
.contact-cards { display: grid; gap: .8rem; }
.contact-card {
	display: grid; gap: .15rem; padding: 1.05rem 1.3rem;
	background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .14);
	border-radius: var(--radius-sm); color: #fff;
	transition: background-color .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);
}
.contact-card:hover { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .3); transform: translateX(4px); }
.contact-label { font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: #9ec6ee; }
.contact-value { font-family: var(--font-display); font-size: 1.03rem; word-break: break-word; }

.contact-form-wrap {
	background: rgba(255, 255, 255, .07);
	border: 1px solid rgba(255, 255, 255, .14);
	border-radius: var(--radius);
	padding: clamp(1.4rem, 3vw, 2rem);
	backdrop-filter: blur(8px);
}
.contact-form { display: grid; gap: 1.1rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { display: grid; gap: .4rem; }
.field label {
	font-family: var(--font-display); font-size: .82rem; font-weight: 600;
	letter-spacing: .04em; color: #e8eef7;
}
.field label .optional { font-weight: 500; color: #8fa3bd; letter-spacing: 0; }
.field input,
.field select,
.field textarea {
	width: 100%;
	font: inherit;
	color: var(--ink);
	background: #fff;
	border: 1.5px solid transparent;
	border-radius: var(--radius-sm);
	padding: .78rem .95rem;
	transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.field select {
	appearance: none;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%230253A5' d='M4.5 6.2 8 9.8l3.5-3.6'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right .9rem center;
	padding-right: 2.4rem;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input::placeholder,
.field textarea::placeholder { color: #9aa6b8; }
.field input:focus,
.field select:focus,
.field textarea:focus {
	outline: none;
	border-color: var(--blue);
	box-shadow: 0 0 0 3px rgba(2, 83, 165, .25);
}
.field.is-invalid input,
.field.is-invalid select,
.field.is-invalid textarea {
	border-color: #e35d5d;
	box-shadow: 0 0 0 3px rgba(227, 93, 93, .2);
}
.field-error { margin: 0; font-size: .82rem; color: #ffb4b4; }
.btn-submit { width: 100%; justify-content: center; margin-top: .2rem; }
.btn-submit:disabled { opacity: .7; cursor: wait; transform: none; }
.form-status {
	margin: 0; font-size: .92rem; text-align: center;
	padding: .75rem 1rem; border-radius: var(--radius-sm);
}
.form-status.is-success {
	background: rgba(46, 160, 100, .18); color: #b7f0cb;
	border: 1px solid rgba(46, 160, 100, .35);
}
.form-status.is-error {
	background: rgba(227, 93, 93, .15); color: #ffb4b4;
	border: 1px solid rgba(227, 93, 93, .35);
}

/* ---------------------------------------------------------------- footer */
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 2.2rem 0; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem 2rem; }
.footer-brand { display: flex; align-items: center; gap: .8rem; }
.footer-mark { width: 40px; height: 40px; }
.footer-name { font-family: var(--font-display); font-weight: 700; color: var(--ink); margin: 0; }
.footer-tag { margin: 0; font-size: .88rem; color: var(--muted); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.2rem; margin-inline: auto; }
.footer-nav a { color: var(--text); font-size: .93rem; }
.footer-nav a:hover { color: var(--blue); }
.footer-legal { margin: 0; font-size: .85rem; color: var(--muted); }

/* --------------------------------------------------------------- reveals */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ------------------------------------------------------------ responsive */
@media (max-width: 960px) {
	.hero-inner, .about-grid, .contact-grid { grid-template-columns: 1fr; }
	.hero-art { order: -1; }
	.hero-art-stage { width: min(100%, 330px); }
	.card-grid, .steps, .pillar-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
	.nav-toggle { display: grid; place-items: center; }
	.primary-nav {
		position: absolute; inset: 74px .75rem auto; margin: 0;
		flex-direction: column; align-items: stretch; gap: .2rem;
		background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
		padding: .6rem; box-shadow: var(--shadow-sm);
		display: none;
	}
	.primary-nav.is-open { display: flex; }
	.primary-nav a { padding: .75rem 1rem; border-radius: var(--radius-sm); }
	.nav-cta { margin: .4rem 0 0; justify-content: center; }
}

@media (max-width: 620px) {
	body { font-size: 16px; }
	.eyebrow { font-size: .7rem; letter-spacing: .1em; padding: .38rem .8rem; }
	.card-grid, .steps, .pillar-grid { grid-template-columns: 1fr; }
	.field-row { grid-template-columns: 1fr; }
	.footer-inner { flex-direction: column; align-items: flex-start; }
	.footer-nav { margin-inline: 0; }
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after {
		animation-duration: .001ms !important; animation-iteration-count: 1 !important;
		transition-duration: .001ms !important;
	}
	.reveal { opacity: 1; transform: none; }
}