:root {
  --bg: #071014;
  --bg-elevated: rgba(10, 21, 27, 0.72);
  --panel: rgba(12, 27, 34, 0.82);
  --line: rgba(151, 208, 219, 0.18);
  --line-strong: rgba(151, 208, 219, 0.36);
  --text: #edf6f8;
  --muted: #9db6bd;
  --accent: #9ad9d5;
  --accent-strong: #c6fffa;
  --danger: #ffcabd;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top, rgba(74, 120, 127, 0.22), transparent 28%),
    radial-gradient(circle at 80% 20%, rgba(73, 139, 160, 0.18), transparent 22%),
    linear-gradient(180deg, #081116 0%, #071014 54%, #050b0f 100%);
  color: var(--text);
  font-family: "Manrope", sans-serif;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.03) 0,
      rgba(255, 255, 255, 0.03) 1px,
      transparent 1px,
      transparent 4px
    );
  opacity: 0.08;
  mix-blend-mode: screen;
}

a,
button,
input {
  font: inherit;
}

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

button {
  cursor: pointer;
}

.signal-noise,
.signal-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.signal-noise {
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.08) 0.7px, transparent 0.7px);
  background-size: 10px 10px;
  opacity: 0.04;
  animation: drift 18s linear infinite;
}

.signal-grid {
  background-image:
    linear-gradient(rgba(154, 217, 213, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 217, 213, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 92%);
  opacity: 0.18;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header,
.site-footer,
.hero,
.section {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0 0;
}

.wordmark,
.header-link,
.eyebrow,
.section-label,
.panel-header,
.pillar-index,
.form-note,
.protocol-copy,
.site-footer,
.footer-hint,
.signal-dialog__header {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.wordmark {
  font-size: 0.95rem;
  color: var(--accent-strong);
}

.header-link,
.footer-hint {
  color: var(--muted);
  font-size: 0.78rem;
  transition: color 180ms ease, border-color 180ms ease;
}

.header-link:hover,
.footer-hint:hover,
.header-link:focus-visible,
.footer-hint:focus-visible {
  color: var(--accent-strong);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 2rem;
  align-items: end;
  min-height: calc(100vh - 6rem);
  padding: 5.5rem 0 4rem;
}

.hero-copy h1,
.section-intro h2 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  max-width: 10ch;
  font-size: clamp(3.3rem, 8vw, 7.4rem);
}

.eyebrow,
.section-label {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.78rem;
}

.lede {
  max-width: 32rem;
  margin: 1.5rem 0 0;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: #d9eaee;
}

.supporting,
.prose p {
  max-width: 42rem;
  color: var(--muted);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.9rem 1.35rem;
  min-height: 3rem;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.button-primary {
  background: linear-gradient(180deg, rgba(154, 217, 213, 0.16), rgba(154, 217, 213, 0.08));
  color: var(--accent-strong);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.hero-panel,
.pillar,
.transmission-form,
.protocol-block,
.signal-dialog {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(15, 29, 36, 0.76), rgba(6, 13, 17, 0.88));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-panel {
  padding: 1.2rem;
  align-self: stretch;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--accent);
  font-size: 0.74rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(151, 208, 219, 0.12);
}

.panel-body {
  padding-top: 1rem;
  color: #bfd4d8;
}

.section {
  padding: 2.5rem 0;
}

.section-intro {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.section-intro h2 {
  max-width: 12ch;
  font-size: clamp(2rem, 4vw, 3.8rem);
}

.prose {
  max-width: 48rem;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.pillar {
  padding: 1.4rem;
}

.pillar-index {
  margin: 0 0 1rem;
  font-size: 0.72rem;
  color: var(--accent);
}

.pillar h3 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
}

.pillar p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.transmission-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 1.5rem;
  align-items: start;
}

.transmission-form {
  display: grid;
  gap: 0.85rem;
  padding: 1.25rem;
}

.form-label {
  font-size: 0.95rem;
}

.transmission-form input {
  width: 100%;
  border: 1px solid rgba(151, 208, 219, 0.18);
  border-radius: var(--radius-sm);
  background: rgba(7, 16, 20, 0.72);
  color: var(--text);
  padding: 0.95rem 1rem;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.transmission-form input:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 4px rgba(154, 217, 213, 0.08);
}

.transmission-form input::placeholder {
  color: rgba(157, 182, 189, 0.68);
}

.form-note {
  margin: 0;
  font-size: 0.72rem;
  color: var(--muted);
}

.form-response {
  min-height: 1.5rem;
  margin: 0;
  color: var(--accent-strong);
}

.form-response.is-error {
  color: var(--danger);
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.protocol-block {
  padding: 1.2rem;
}

.protocol-copy {
  margin: 1.1rem 0;
  white-space: pre-wrap;
  color: #d5f4ef;
  font-size: 0.88rem;
  line-height: 1.8;
}

.protocol-hint {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0 2rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.footer-hint {
  border: 0;
  background: transparent;
  padding: 0;
}

.signal-dialog {
  width: min(32rem, calc(100% - 2rem));
  padding: 0;
  color: var(--text);
}

.signal-dialog::backdrop {
  background: rgba(1, 5, 8, 0.72);
  backdrop-filter: blur(10px);
}

.signal-dialog__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  font-size: 0.74rem;
}

.signal-dialog p {
  margin: 0;
  padding: 1.25rem;
  color: #d4e6ea;
}

.dialog-close {
  border: 0;
  background: transparent;
  color: inherit;
}

@keyframes drift {
  from {
    transform: translateY(0);
  }

  to {
    transform: translateY(10px);
  }
}

@media (max-width: 920px) {
  .hero,
  .pillars,
  .transmission-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 4rem;
  }

  .hero-panel {
    max-width: 36rem;
  }
}

@media (max-width: 640px) {
  .site-header,
  .site-footer,
  .hero,
  .section {
    width: min(calc(100% - 1.25rem), var(--max-width));
  }

  .site-header,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-copy h1 {
    max-width: 12ch;
  }

  .button,
  .hero-actions > * {
    width: 100%;
  }
}