:root {
  --ink: #102033;
  --navy: #0c2748;
  --navy-deep: #071a31;
  --accent: #2e6f92;
  --accent-soft: #dceaf0;
  --paper: #f7f6f2;
  --white: #ffffff;
  --muted: #667587;
  --line: #d8dee5;
  --shadow: 0 18px 50px rgba(12, 39, 72, 0.10);
  --shell: 1180px;
  --radius: 18px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  background: rgba(247, 246, 242, 0.90);
  border-bottom: 1px solid rgba(216, 222, 229, 0.8);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark,
.closing-mark {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-weight: 700;
  letter-spacing: -0.12em;
}

.brand-mark {
  color: var(--accent);
  font-size: 1.35rem;
}

.brand-name {
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  gap: 28px;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--navy);
}

.hero {
  padding: 92px 0 88px;
  background:
    radial-gradient(circle at 78% 24%, rgba(46, 111, 146, 0.09), transparent 26rem),
    linear-gradient(180deg, #faf9f6 0%, var(--paper) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.55fr);
  gap: clamp(48px, 8vw, 110px);
  align-items: center;
}

.eyebrow,
.section-label,
.card-number,
.closing-kicker,
.signal-panel {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.eyebrow {
  margin: 0 0 26px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--navy-deep);
  font-size: clamp(3rem, 5.6vw, 5.55rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.hero h1 .headline-line {
  display: block;
  white-space: nowrap;
}

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

.lede {
  max-width: 760px;
  margin: 32px 0 0;
  color: #3f4f60;
  font-size: clamp(1.14rem, 1.7vw, 1.38rem);
  line-height: 1.65;
}

.hero-rule {
  width: 88px;
  height: 2px;
  margin: 36px 0 18px;
  background: var(--accent);
}

.hero-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.signal-panel {
  min-height: 390px;
  padding: 22px;
  color: #cce0ed;
  background: var(--navy);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.signal-topline,
.signal-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: #9fbed2;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-field {
  position: relative;
  height: 282px;
  margin: 18px 0;
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 12px;
  background:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 34px 34px;
}

.signal-code {
  position: absolute;
  left: 24px;
  bottom: 24px;
  display: grid;
  gap: 6px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.signal-code span:nth-child(2) {
  color: #fff;
}

.signal-dot {
  position: absolute;
  z-index: 2;
  width: 11px;
  height: 11px;
  background: #7eb0cb;
  border: 3px solid #cfe5f0;
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(126, 176, 203, 0.12);
}

.dot-a { top: 52px; left: 48px; }
.dot-b { top: 96px; right: 70px; }
.dot-c { top: 154px; left: 118px; }
.dot-d { top: 64px; left: 54%; }

.signal-line {
  position: absolute;
  z-index: 1;
  height: 1px;
  transform-origin: left center;
  background: rgba(151, 194, 216, 0.48);
}

.line-a { top: 58px; left: 55px; width: 160px; transform: rotate(10deg); }
.line-b { top: 101px; left: 128px; width: 150px; transform: rotate(-18deg); }
.line-c { top: 160px; left: 123px; width: 150px; transform: rotate(-28deg); }
.line-d { top: 74px; left: 54%; width: 115px; transform: rotate(17deg); }

.cursor {
  color: #fff;
}

.section {
  padding: 104px 0;
  background: var(--paper);
}

.section-tint {
  background: #edf2f4;
}

.split-layout {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: clamp(36px, 7vw, 96px);
}

.section-label {
  padding-top: 8px;
  color: var(--muted);
}

.section-label span {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.section-label p {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.section-content h2 {
  max-width: 800px;
  margin: 0 0 42px;
  color: var(--navy-deep);
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.prose-columns {
  columns: 2 320px;
  column-gap: 56px;
  max-width: 940px;
}

.prose-columns p {
  break-inside: avoid;
  margin: 0 0 22px;
  color: #465667;
  font-size: 1.04rem;
}

.section-intro,
.section-closing {
  max-width: 900px;
  color: #465667;
  font-size: 1.04rem;
}

.section-intro {
  margin: -10px 0 38px;
}

.section-closing {
  margin: 38px 0 0;
}

.experience-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.experience-grid div {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.66);
  font-weight: 680;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.capability-card {
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.capability-card-wide {
  grid-column: 1 / -1;
}

.card-number {
  margin: 0 0 34px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
}

.capability-card h3 {
  margin: 0 0 12px;
  color: var(--navy);
  font-size: 1.18rem;
  letter-spacing: -0.01em;
}

.capability-card p:last-child {
  margin: 0;
  color: #556474;
}

.closing-strip {
  padding: 72px 0;
  color: var(--white);
  background: var(--navy-deep);
}

.closing-inner {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
}

.closing-kicker {
  margin: 0 0 8px;
  color: #9ab8cc;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
}

.closing-name {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.6rem);
  font-weight: 750;
  letter-spacing: -0.025em;
}

.closing-mark {
  color: #80aac3;
  font-size: clamp(2.6rem, 7vw, 5rem);
}

.site-footer {
  padding: 24px 0;
  color: #8c99a6;
  background: #061526;
  font-size: 0.78rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 820px) {
  .site-nav {
    display: none;
  }

  .hero {
    padding: 66px 0 72px;
  }

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

  .signal-panel {
    min-height: 330px;
  }

  .signal-field {
    height: 220px;
  }

  .split-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .section-label {
    padding-top: 0;
  }

  .section {
    padding: 78px 0;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(calc(100% - 28px), var(--shell));
  }

  .header-inner {
    min-height: 62px;
  }

  .brand-name {
    font-size: 0.93rem;
  }

  .hero h1 {
    font-size: clamp(2.75rem, 15vw, 4.4rem);
  }

  .hero h1 .headline-line {
    white-space: normal;
  }

  .lede {
    font-size: 1.05rem;
  }

  .experience-grid,
  .capability-grid {
    grid-template-columns: 1fr;
  }

  .capability-card-wide {
    grid-column: auto;
  }

  .prose-columns {
    columns: 1;
  }

  .closing-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner {
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}