:root {
  color-scheme: dark;
  --ink: #07131d;
  --ink-deep: #02070c;
  --surface: #0c1b26;
  --surface-raised: #122838;
  --ring: #2a3b47;
  --signal: #1d9bda;
  --signal-soft: #68c8f4;
  --cream: #f2e9dd;
  --text: #e8edf1;
  --muted: #a1adb7;
  --shadow: rgba(2, 7, 12, 0.5);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--ink-deep);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--ink-deep);
  color: var(--text);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  align-items: center;
  background: rgba(2, 7, 12, 0.74);
  border-bottom: 1px solid rgba(42, 59, 71, 0.58);
  display: flex;
  height: 64px;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 72px);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
}

.brand-link {
  color: var(--cream);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

nav {
  display: flex;
  gap: clamp(16px, 3vw, 30px);
}

nav a,
footer a {
  color: var(--muted);
  font-size: 0.94rem;
  transition: color 180ms ease;
}

nav a:hover,
footer a:hover {
  color: var(--signal-soft);
}

.hero {
  align-items: center;
  background:
    linear-gradient(90deg, rgba(2, 7, 12, 0.88), rgba(2, 7, 12, 0.46) 52%, rgba(2, 7, 12, 0.18)),
    url("assets/signal-field.svg") center / cover no-repeat;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 0.55fr);
  min-height: calc(86svh - 64px);
  overflow: hidden;
  padding: clamp(72px, 10vw, 140px) clamp(24px, 7vw, 96px);
  position: relative;
}

.hero::after {
  background: linear-gradient(180deg, transparent, var(--ink-deep));
  bottom: 0;
  content: "";
  height: 18%;
  left: 0;
  position: absolute;
  right: 0;
  pointer-events: none;
}

.hero-copy {
  animation: rise-in 700ms ease both;
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: var(--signal-soft);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  margin: 0 0 18px;
  text-transform: uppercase;
}

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

h1 {
  color: var(--cream);
  font-size: clamp(4.4rem, 13vw, 10.5rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 0.86;
  margin-bottom: 28px;
  text-wrap: balance;
}

h2 {
  color: var(--text);
  font-size: clamp(2rem, 4.5vw, 4.25rem);
  font-weight: 760;
  letter-spacing: 0;
  line-height: 0.98;
  margin-bottom: 0;
  text-wrap: balance;
}

.lede {
  color: var(--text);
  font-size: clamp(1.26rem, 2.3vw, 2rem);
  line-height: 1.24;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.primary-link,
.secondary-link {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-weight: 800;
  min-height: 48px;
  padding: 0 22px;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.primary-link {
  background: var(--signal);
  color: var(--ink-deep);
}

.secondary-link {
  border: 1px solid rgba(232, 237, 241, 0.22);
  color: var(--text);
}

.primary-link:hover,
.secondary-link:hover {
  transform: translateY(-2px);
}

.secondary-link:hover {
  border-color: rgba(104, 200, 244, 0.7);
  color: var(--signal-soft);
}

.signal-meter {
  align-items: center;
  display: flex;
  gap: clamp(8px, 1.3vw, 16px);
  height: 340px;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.signal-meter span {
  animation: pulse-bar 1.65s ease-in-out infinite;
  animation-delay: calc(var(--i) * -115ms);
  background: linear-gradient(180deg, rgba(104, 200, 244, 0.16), rgba(104, 200, 244, 0.94), rgba(242, 233, 221, 0.66));
  border-radius: 999px;
  box-shadow: 0 0 28px rgba(29, 155, 218, 0.35);
  display: block;
  height: calc(86px + (var(--i) * 18px));
  width: clamp(5px, 0.7vw, 10px);
}

.plain-section,
.story-section,
.detail-section {
  border-top: 1px solid rgba(42, 59, 71, 0.5);
  padding: clamp(68px, 11vw, 132px) clamp(24px, 7vw, 96px);
}

.plain-section {
  background: var(--ink-deep);
}

.story-section {
  background:
    radial-gradient(circle at 18% 30%, rgba(29, 155, 218, 0.18), transparent 30%),
    linear-gradient(180deg, var(--ink-deep), var(--surface));
}

.detail-section {
  background: linear-gradient(180deg, var(--surface), var(--ink));
}

.section-inner {
  margin: 0 auto;
  max-width: 1120px;
}

.two-column {
  align-items: start;
  display: grid;
  gap: clamp(28px, 6vw, 84px);
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.8fr);
}

.story-layout {
  display: grid;
  gap: 22px;
  max-width: 880px;
}

.two-column > p,
.detail-grid p,
.story-layout p,
.policy p,
.note-summary,
.article-body p,
.article-body li {
  color: var(--muted);
  font-size: clamp(1.03rem, 1.5vw, 1.2rem);
  line-height: 1.68;
}

.story-layout p {
  margin-bottom: 0;
  max-width: 760px;
}

.text-link {
  color: var(--cream);
  display: inline-flex;
  font-weight: 800;
  justify-self: start;
  padding-bottom: 4px;
  position: relative;
}

.text-link::after {
  background: var(--signal-soft);
  bottom: 0;
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  right: 0;
  transform: scaleX(0.5);
  transform-origin: left;
  transition: transform 180ms ease;
}

.text-link:hover::after {
  transform: scaleX(1);
}

.detail-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 48px;
}

.detail-grid p {
  background: rgba(2, 7, 12, 0.34);
  border-top: 2px solid rgba(104, 200, 244, 0.38);
  margin: 0;
  min-height: 180px;
  padding: clamp(22px, 3vw, 34px);
}

.policy-main {
  background:
    linear-gradient(180deg, rgba(7, 19, 29, 0.96), rgba(2, 7, 12, 1)),
    url("assets/signal-field.svg") center top / 1600px auto no-repeat;
  min-height: calc(100svh - 64px);
  padding: clamp(56px, 9vw, 104px) clamp(22px, 7vw, 96px);
}

.article-main {
  background:
    linear-gradient(180deg, rgba(7, 19, 29, 0.96), rgba(2, 7, 12, 1) 72%),
    url("assets/signal-field.svg") center top / 1600px auto no-repeat;
  min-height: calc(100svh - 64px);
}

.article-hero {
  animation: rise-in 620ms ease both;
  margin: 0 auto;
  max-width: 1040px;
  padding: clamp(62px, 10vw, 128px) clamp(22px, 7vw, 96px) clamp(34px, 7vw, 74px);
}

.article-hero h1 {
  font-size: clamp(3.1rem, 9vw, 8.2rem);
  max-width: 980px;
}

.article-hero .lede {
  max-width: 780px;
}

.article-body {
  margin: 0 auto;
  max-width: 820px;
  padding: 0 clamp(22px, 7vw, 96px) clamp(74px, 11vw, 132px);
}

.article-hero,
.article-body {
  overflow-wrap: break-word;
  width: 100%;
}

.article-body h2 {
  color: var(--cream);
  font-size: clamp(1.58rem, 2.6vw, 2.35rem);
  line-height: 1.12;
  margin: 56px 0 14px;
}

.article-body p {
  margin-bottom: 24px;
}

.article-body ul {
  border-left: 2px solid rgba(104, 200, 244, 0.4);
  list-style: none;
  margin: 26px 0 34px;
  padding-left: 24px;
}

.article-body li {
  margin: 14px 0;
}

.article-body a {
  color: var(--signal-soft);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.note-list {
  display: grid;
  gap: 1px;
  margin-top: 48px;
}

.note-link {
  background: rgba(2, 7, 12, 0.34);
  border-top: 1px solid rgba(104, 200, 244, 0.34);
  display: grid;
  gap: 12px;
  padding: clamp(24px, 4vw, 42px) 0;
  transition: border-color 180ms ease, transform 180ms ease;
}

.note-link:hover {
  border-color: rgba(242, 233, 221, 0.62);
  transform: translateX(4px);
}

.note-title {
  color: var(--cream);
  font-size: clamp(1.35rem, 2.7vw, 2rem);
  font-weight: 800;
}

.note-summary {
  margin: 0;
  max-width: 760px;
}

.policy {
  animation: rise-in 520ms ease both;
  margin: 0 auto;
  max-width: 820px;
}

.policy h1 {
  font-size: clamp(3rem, 8vw, 6.8rem);
  margin-bottom: 32px;
}

.policy h2 {
  color: var(--cream);
  font-size: clamp(1.34rem, 2.2vw, 2rem);
  line-height: 1.16;
  margin: 46px 0 12px;
}

.policy a {
  color: var(--signal-soft);
  text-decoration: underline;
  text-underline-offset: 4px;
}

footer {
  align-items: center;
  background: var(--ink-deep);
  border-top: 1px solid rgba(42, 59, 71, 0.5);
  color: var(--muted);
  display: flex;
  gap: 22px;
  justify-content: space-between;
  min-height: 76px;
  padding: 0 clamp(20px, 5vw, 72px);
}

footer span {
  color: var(--cream);
  font-weight: 800;
}

@keyframes rise-in {
  from {
    opacity: 0.78;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-bar {
  0%,
  100% {
    opacity: 0.34;
    transform: scaleY(0.42);
  }
  42% {
    opacity: 1;
    transform: scaleY(1);
  }
}

@media (max-width: 780px) {
  .site-header {
    height: 58px;
    min-width: 0;
    padding-inline: 16px;
  }

  .brand-link {
    font-size: 0.75rem;
    letter-spacing: 0.16em;
  }

  nav {
    flex: 0 1 auto;
    gap: 12px;
    justify-content: flex-end;
    min-width: 0;
  }

  nav a {
    font-size: 0.84rem;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: calc(88svh - 58px);
    padding: 62px 22px 48px;
  }

  .hero-copy,
  .hero .lede {
    max-width: 100%;
  }

  .hero .lede {
    max-width: 32ch;
  }

  .signal-meter {
    height: 150px;
    justify-content: flex-start;
    margin-top: 38px;
  }

  .signal-meter span {
    height: calc(52px + (var(--i) * 9px));
  }

  .two-column,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .article-main {
    min-height: calc(100svh - 58px);
  }

  .article-hero {
    padding-top: 54px;
  }

  .article-body,
  .article-hero {
    max-width: 100%;
  }

  .article-hero .lede,
  .article-body p,
  .article-body li {
    max-width: 34ch;
  }

  .detail-grid p {
    min-height: 0;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
    padding-block: 20px;
  }
}

@media (max-width: 560px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    height: auto;
    min-height: 74px;
    padding-block: 14px;
    padding-inline: 14px;
  }

  .brand-link {
    font-size: 0.68rem;
    letter-spacing: 0.12em;
  }

  nav {
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-start;
    max-width: 100%;
  }

  nav a {
    font-size: 0.78rem;
  }

  h1 {
    font-size: clamp(2.45rem, 11vw, 3rem);
  }

  .article-hero {
    padding-inline: 20px;
  }

  .article-hero h1 {
    font-size: clamp(2.28rem, 10vw, 3.1rem);
    max-width: 10.5ch;
  }

  .article-body {
    padding-inline: 20px;
  }

  .lede {
    font-size: 1.12rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}