/* ============================================================
   712 Federal Supply — Design System
   ============================================================ */

:root {
  /* Brand palette (derived from logo) */
  --color-navy: #073b6b;
  --color-navy-dark: #052a4d;
  --color-navy-hover: #0a4a86;
  --color-steel: #8a9298;
  --color-steel-light: #c9ced1;
  --color-charcoal: #33383d;
  --color-text: #1f2328;
  --color-text-muted: #565e64;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f8;
  --color-border: #e2e5e8;
  --color-focus: #1a73c1;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";

  /* Layout */
  --container-width: 1180px;
  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(7, 59, 107, 0.06);
  --shadow-md: 0 4px 16px rgba(7, 59, 107, 0.08);
  --transition: 150ms ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  text-decoration: underline;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.5em;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-navy);
}

p {
  margin: 0 0 1em;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-navy);
  color: #fff;
  padding: 12px 20px;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 88px 0;
}

.section--alt {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  max-width: 680px;
  margin: 0 0 48px;
}

.section-header--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-steel);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(28px, 3.4vw, 34px);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 17px;
  margin-bottom: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--color-navy);
  color: #fff;
  border-color: var(--color-navy);
}

.btn-primary:hover {
  background: var(--color-navy-hover);
  border-color: var(--color-navy-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-secondary:hover {
  background: var(--color-navy);
  color: #fff;
}

.btn-block {
  width: 100%;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: saturate(180%) blur(6px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}

.brand {
  display: flex;
  align-items: center;
}

.brand img {
  height: 40px;
  width: auto;
}

.brand-text {
  font-weight: 700;
  color: var(--color-navy);
  font-size: 18px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.main-nav ul {
  display: flex;
  gap: 32px;
}

.main-nav a:not(.btn) {
  color: var(--color-charcoal);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.main-nav a:not(.btn):hover,
.main-nav a:not(.btn).is-active {
  color: var(--color-navy);
  border-bottom-color: var(--color-navy);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 20px;
  margin: 0 auto;
  background: var(--color-navy);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  padding: 88px 0 88px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(32px, 4.2vw, 46px);
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.hero p {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-graphic {
  display: flex;
  justify-content: center;
}

.hero-graphic svg {
  width: 100%;
  max-width: 340px;
  height: auto;
}

/* ---------- Capability cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-steel-light);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--color-navy);
}

.card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.card p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ---------- Why 712 ---------- */
.why-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: start;
}

.why-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 28px;
}

.why-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-weight: 600;
  color: var(--color-charcoal);
  font-size: 15.5px;
}

.why-list .check {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.why-list .check svg {
  width: 12px;
  height: 12px;
}

.why-copy p {
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-content {
  max-width: 520px;
}

.about-content p {
  font-size: 17px;
  color: var(--color-text-muted);
}

.network-graphic {
  display: flex;
  justify-content: center;
}

.network-graphic svg {
  width: 100%;
  max-width: 420px;
  height: auto;
}

/* ---------- Gov info panel ---------- */
.info-panel {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.info-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  border-bottom: 1px solid var(--color-border);
}

.info-row:last-child {
  border-bottom: none;
}

.info-row:nth-child(even) {
  background: var(--color-bg-alt);
}

.info-row dt {
  padding: 16px 24px;
  font-weight: 600;
  color: var(--color-navy);
  font-size: 14.5px;
}

.info-row dd {
  margin: 0;
  padding: 16px 24px;
  color: var(--color-charcoal);
  font-size: 14.5px;
  border-left: 1px solid var(--color-border);
}

.info-note {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 20px;
  padding: 16px 20px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-muted);
  font-size: 14.5px;
}

.info-note svg {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  color: var(--color-steel);
}

/* ---------- Contact page ---------- */
.contact-hero {
  padding: 72px 0 0;
}

.contact-hero h1 {
  font-size: clamp(28px, 4vw, 38px);
}

.contact-hero p {
  color: var(--color-text-muted);
  font-size: 17px;
  max-width: 640px;
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: start;
}

.founder-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.founder-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 22px;
  background: var(--color-bg);
}

.founder-card .name {
  font-weight: 700;
  color: var(--color-navy);
  font-size: 16px;
  margin-bottom: 2px;
}

.founder-card .role {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-bottom: 10px;
}

.founder-card a {
  font-size: 14.5px;
  font-weight: 600;
}

.contact-form {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  background: var(--color-bg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-charcoal);
  margin-bottom: 6px;
}

.form-group .optional {
  font-weight: 400;
  color: var(--color-steel);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--color-steel-light);
  border-radius: var(--radius);
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-navy);
  outline: none;
  box-shadow: 0 0 0 3px rgba(7, 59, 107, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-note {
  font-size: 13.5px;
  color: var(--color-text-muted);
  margin-top: 14px;
  margin-bottom: 0;
}

.form-status {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14.5px;
  display: none;
}

.form-status.is-visible {
  display: block;
}

.form-status.success {
  background: #eaf3ec;
  color: #1e5e34;
  border: 1px solid #c3ddc9;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-navy-dark);
  color: #cdd7e1;
  padding: 56px 0 28px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 24px;
}

.footer-brand img {
  height: 32px;
  margin-bottom: 14px;
  filter: brightness(0) invert(1);
}

.footer-brand p {
  color: #9fb0c0;
  font-size: 14px;
  max-width: 320px;
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
}

.footer-col h4 {
  color: #fff;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: #b9c6d2;
  font-size: 14.5px;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #8ba0b2;
}

.footer-disclaimer {
  max-width: 780px;
  font-size: 12.5px;
  color: #7d93a6;
  line-height: 1.6;
  margin-bottom: 20px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-graphic {
    order: -1;
    margin-bottom: 8px;
  }

  .hero-graphic svg {
    max-width: 220px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-content {
    max-width: none;
  }

  .network-graphic {
    order: -1;
  }

  .network-graphic svg {
    max-width: 320px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .info-row {
    grid-template-columns: 1fr;
  }

  .info-row dd {
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-top: 10px;
  }
}

@media (max-width: 720px) {
  .section {
    padding: 64px 0;
  }

  .main-nav {
    position: fixed;
    top: 84px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
  }

  .main-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 4px;
  }

  .main-nav a:not(.btn) {
    display: block;
    padding: 12px 4px;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 56px 0 48px;
  }

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

  .why-list {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-top {
    flex-direction: column;
  }

  .footer-bottom {
    flex-direction: column;
  }
}