/* Hammond Systems Laboratory static website
   Edit brand colors and sizing here first.
*/

:root {
  --hsl-navy: #021124;
  --hsl-blue: #043ac1;
  --hsl-ink: #071829;
  --hsl-muted: #56616f;
  --hsl-gray: #767b82;
  --hsl-line: #d9dee6;
  --hsl-bg: #ffffff;
  --hsl-soft: #f5f7fb;
  --hsl-card: #ffffff;
  --hsl-shadow: 0 24px 70px rgba(2, 17, 36, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1160px;
  --font-main: "Aptos", "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--hsl-ink);
  background: var(--hsl-bg);
  font-family: var(--font-main);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--hsl-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 999;
  padding: 0.75rem 1rem;
  background: var(--hsl-navy);
  color: #fff;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(217, 222, 230, 0.85);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand img {
  width: min(360px, 56vw);
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--hsl-ink);
}

.site-nav a:hover {
  color: var(--hsl-blue);
  text-decoration: none;
}

.nav-cta {
  padding: 0.7rem 1rem;
  border: 1px solid var(--hsl-blue);
  border-radius: 999px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--hsl-line);
  border-radius: 999px;
  background: #fff;
}

.nav-toggle-line {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--hsl-navy);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6vw, 80px) 0 clamp(54px, 8vw, 105px);
  background:
    radial-gradient(circle at 15% 20%, rgba(4, 58, 193, 0.12), transparent 32%),
    linear-gradient(180deg, #fff 0%, #f8faff 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -45% auto;
  width: 650px;
  height: 650px;
  border-radius: 50%;
  border: 1px solid rgba(4, 58, 193, 0.16);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: clamp(36px, 7vw, 92px);
  align-items: center;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--hsl-blue);
  font-size: 0.77rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow-light {
  color: #9fb9ff;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 900px;
  margin-bottom: 1.2rem;
  color: var(--hsl-navy);
  font-size: clamp(2.1rem, 4.8vw, 4.1rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 1rem;
  color: var(--hsl-navy);
  font-size: clamp(2rem, 4.4vw, 3.55rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 0.55rem;
  color: var(--hsl-navy);
  font-size: 1.05rem;
  letter-spacing: -0.012em;
}

.hero-lede {
  max-width: 720px;
  color: var(--hsl-muted);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.button-primary {
  color: #fff;
  background: var(--hsl-blue);
  box-shadow: 0 12px 30px rgba(4, 58, 193, 0.25);
}

.button-secondary {
  color: var(--hsl-navy);
  border: 1px solid var(--hsl-line);
  background: #fff;
}

.button-light {
  color: var(--hsl-navy);
  background: #fff;
}

.hero-card {
  position: relative;
  padding: clamp(1.6rem, 3vw, 2.35rem);
  border: 1px solid rgba(4, 58, 193, 0.13);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--hsl-shadow);
  backdrop-filter: blur(14px);
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(4, 58, 193, 0.1);
  border-radius: calc(var(--radius-lg) - 10px);
  pointer-events: none;
}

.hero-mark {
  width: 210px;
  margin-bottom: 1.5rem;
}

.hero-card h2 {
  font-size: clamp(1.55rem, 2.7vw, 2.35rem);
}

.hero-card p {
  color: var(--hsl-muted);
}

.metrics {
  display: grid;
  gap: 0.85rem;
  margin: 1.4rem 0 0;
}

.metrics div {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--hsl-line);
}

.metrics dt {
  color: var(--hsl-muted);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.metrics dd {
  margin: 0;
  color: var(--hsl-navy);
  font-weight: 800;
}

.section {
  padding: clamp(64px, 8vw, 112px) 0;
}

.section-muted {
  background: var(--hsl-soft);
}

.intro-band {
  padding: 0;
  background: var(--hsl-navy);
}

.three-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.16);
}

.three-pillars article {
  padding: clamp(1.6rem, 3vw, 2.35rem);
  background: var(--hsl-navy);
  color: #fff;
}

.three-pillars h3 {
  color: #fff;
  font-size: 1.2rem;
}

.three-pillars p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.72);
}

.pillar-number {
  display: inline-block;
  margin-bottom: 1rem;
  color: #9fb9ff;
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.2em;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1fr);
  gap: clamp(32px, 7vw, 96px);
}

.prose p,
.section-note {
  color: var(--hsl-muted);
  font-size: 1.03rem;
}

.prose strong {
  color: var(--hsl-navy);
}

.section-heading {
  max-width: 820px;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-heading p {
  color: var(--hsl-muted);
  font-size: 1.08rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-card,
.project-card,
.capability-item,
.contact-card {
  border: 1px solid var(--hsl-line);
  border-radius: var(--radius-md);
  background: var(--hsl-card);
}

.feature-card {
  min-height: 230px;
  padding: 1.5rem;
  box-shadow: 0 12px 30px rgba(2, 17, 36, 0.04);
}

.feature-card p,
.project-card p,
.capability-item p {
  margin-bottom: 0;
  color: var(--hsl-muted);
}

.feature-card::before {
  content: "";
  display: block;
  width: 46px;
  height: 4px;
  margin-bottom: 1.2rem;
  border-radius: 999px;
  background: var(--hsl-blue);
}

.capability-list {
  display: grid;
  gap: 1rem;
}

.capability-item {
  padding: 1.35rem 1.45rem;
}

.section-dark {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(4, 58, 193, 0.18), transparent 40%),
    var(--hsl-navy);
}

.section-dark h2 {
  max-width: 900px;
  color: #fff;
}

.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.project-list {
  display: grid;
  gap: 1rem;
}

.project-card {
  display: grid;
  grid-template-columns: 0.35fr 1fr;
  gap: 2rem;
  padding: clamp(1.25rem, 2.4vw, 1.8rem);
}

.project-card h3 {
  margin-bottom: 0;
}

.contact-section {
  background: linear-gradient(180deg, #fff, var(--hsl-soft));
}

.contact-card {
  display: grid;
  grid-template-columns: 1fr 0.55fr;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(1.7rem, 4.5vw, 3.4rem);
  box-shadow: var(--hsl-shadow);
}

.contact-card p {
  color: var(--hsl-muted);
}

.contact-details {
  padding: 1.4rem;
  border-radius: var(--radius-md);
  background: var(--hsl-soft);
}

.contact-details p {
  margin-bottom: 0.5rem;
}

.contact-details p:first-child {
  color: var(--hsl-navy);
}

.site-footer {
  padding: 2.2rem 0;
  color: rgba(255, 255, 255, 0.74);
  background: #010914;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-mark {
  width: 96px;
  filter: brightness(0) invert(1);
  opacity: 0.86;
}

.footer-inner p {
  margin: 0;
}

.footer-note {
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 900px) {
  .header-inner {
    min-height: 74px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 74px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.75rem;
    border: 1px solid var(--hsl-line);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--hsl-shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
    padding: 0.9rem 0.8rem;
  }

  .nav-cta {
    border-radius: var(--radius-sm);
  }

  .hero-grid,
  .split,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .three-pillars {
    grid-template-columns: 1fr;
  }

  .project-card {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }

  .cta-panel {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, var(--container));
  }

  .brand img {
    width: 270px;
  }

  h1 {
    font-size: clamp(2.5rem, 12vw, 3.4rem);
  }

  .button {
    width: 100%;
  }

  .hero-mark {
    width: 165px;
  }

  .metrics div {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}