:root {
  color-scheme: dark;
  --ink: #f5f1e8;
  --muted: #b5b2aa;
  --dim: #77746e;
  --bg: #111211;
  --bg-deep: #090a09;
  --surface: rgba(23, 24, 23, 0.78);
  --surface-strong: rgba(30, 32, 30, 0.92);
  --line: rgba(245, 241, 232, 0.14);
  --line-strong: rgba(245, 241, 232, 0.24);
  --mint: #65e5bf;
  --amber: #ffb25c;
  --steel: #83a7c8;
  --ember: #d95f50;
  --shadow: rgba(0, 0, 0, 0.44);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-deep);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background: #111211;
}

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

.signal-field {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  background: #111211;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 36px;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 13, 12, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-height: 44px;
  color: var(--ink);
  font-weight: 700;
}

.brand-mark {
  position: relative;
  width: 25px;
  height: 25px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background:
    linear-gradient(90deg, transparent 46%, rgba(101, 229, 191, 0.95) 47%, rgba(101, 229, 191, 0.95) 53%, transparent 54%),
    linear-gradient(0deg, transparent 46%, rgba(255, 178, 92, 0.9) 47%, rgba(255, 178, 92, 0.9) 53%, transparent 54%),
    #191b19;
  box-shadow: 0 0 24px rgba(101, 229, 191, 0.18);
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(131, 167, 200, 0.36);
}

.brand-mark::before {
  inset: 4px;
  border-radius: 4px;
}

.brand-mark::after {
  left: 50%;
  top: -5px;
  width: 1px;
  height: 5px;
  border-width: 0 0 0 1px;
  transform: translateX(-50%);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  border-color: var(--line);
  color: var(--ink);
  outline: none;
  background: rgba(245, 241, 232, 0.06);
}

main {
  position: relative;
  z-index: 1;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  align-items: end;
  gap: 52px;
  width: min(100% - 48px, var(--max));
  min-height: 84svh;
  margin: 0 auto;
  padding: 148px 0 64px;
}

.hero-copy {
  max-width: 820px;
}

.kicker,
.eyebrow {
  margin: 0 0 16px;
  color: var(--mint);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 12px;
  font-size: 5rem;
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 2.35rem;
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 1.05rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.lead {
  margin-bottom: 18px;
  color: var(--amber);
  font-size: 1.52rem;
  font-weight: 700;
  line-height: 1.2;
}

.hero-text {
  max-width: 700px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  font-weight: 700;
  white-space: nowrap;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.button.primary {
  color: #09100d;
  border-color: var(--mint);
  background: var(--mint);
}

.button.secondary {
  color: var(--ink);
  background: rgba(245, 241, 232, 0.07);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  border-color: var(--mint);
}

.status-panel {
  align-self: end;
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: 0 24px 80px var(--shadow);
}

.status-panel::before {
  display: block;
  padding: 10px 18px 8px;
  color: var(--steel);
  background: rgba(18, 19, 18, 0.92);
  content: "PHERNOS SIGNAL";
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  gap: 24px;
  padding: 0 18px;
  background: var(--surface-strong);
}

.status-row span {
  color: var(--dim);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-row strong {
  color: var(--ink);
  font-size: 0.98rem;
}

.section {
  width: min(100% - 48px, var(--max));
  margin: 0 auto;
  padding: 76px 0;
}

.intro-band {
  width: 100%;
  display: grid;
  gap: 10px;
  padding: 28px max(24px, calc((100vw - var(--max)) / 2));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(18, 19, 18, 0.82);
}

.intro-band p {
  max-width: var(--max);
  margin: 0;
  color: var(--muted);
  font-size: 1.04rem;
}

.intro-band p span {
  display: block;
}

.intro-band .audience-line {
  color: var(--ink);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.signal-card {
  position: relative;
  min-height: 236px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(18, 19, 18, 0.82);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
}

.signal-card::after {
  position: absolute;
  right: 18px;
  bottom: 16px;
  width: 54px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(101, 229, 191, 0.42));
}

.signal-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.signal-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 30px;
  border: 1px solid rgba(101, 229, 191, 0.28);
  border-radius: 5px;
  color: var(--mint);
  font-size: 0.8rem;
  font-weight: 800;
}

.signal-icon {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(245, 241, 232, 0.18);
  border-radius: 8px;
  background: rgba(245, 241, 232, 0.04);
}

.signal-icon::before,
.signal-icon::after {
  position: absolute;
  content: "";
}

.icon-private::before {
  inset: 8px;
  border: 1px solid var(--mint);
  border-radius: 4px;
}

.icon-private::after {
  left: 18px;
  top: 7px;
  width: 1px;
  height: 24px;
  background: var(--amber);
}

.icon-gate::before {
  left: 8px;
  top: 17px;
  width: 22px;
  height: 1px;
  background: var(--mint);
}

.icon-gate::after {
  left: 12px;
  top: 9px;
  width: 14px;
  height: 18px;
  border: 1px solid var(--amber);
  border-top: 0;
  border-radius: 0 0 5px 5px;
}

.icon-context::before {
  left: 8px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 15px 6px 0 var(--steel), 8px 20px 0 var(--amber);
}

.icon-context::after {
  left: 12px;
  top: 14px;
  width: 18px;
  height: 15px;
  border: 1px solid rgba(101, 229, 191, 0.56);
  border-left: 0;
  border-bottom: 0;
  transform: skewY(18deg);
}

.icon-trusted::before {
  left: 9px;
  top: 9px;
  width: 20px;
  height: 20px;
  border: 1px solid var(--steel);
  border-radius: 50%;
}

.icon-trusted::after {
  left: 18px;
  top: 6px;
  width: 1px;
  height: 26px;
  background: linear-gradient(var(--mint), var(--amber));
  box-shadow: -9px 13px 0 rgba(101, 229, 191, 0.72), 9px 13px 0 rgba(255, 178, 92, 0.72);
}

.signal-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.split-section {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 54px;
}

.principle-list {
  display: grid;
  gap: 12px;
}

.principle {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.principle p {
  margin-bottom: 0;
  color: var(--muted);
}

.check {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  border: 1px solid var(--mint);
  border-radius: 50%;
  background: radial-gradient(circle at center, var(--mint) 0 3px, transparent 4px);
}

.labs {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.labs-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.labs-strip span {
  display: flex;
  align-items: center;
  position: relative;
  min-height: 84px;
  padding: 18px;
  color: var(--muted);
  background: rgba(18, 19, 18, 0.9);
  font-weight: 700;
}

.labs-strip span::before {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 12px;
  border-radius: 50%;
  content: "";
  background: var(--mint);
  box-shadow: 0 0 18px rgba(101, 229, 191, 0.42);
}

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 120px;
}

.contact h2 {
  max-width: 620px;
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 20px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 86svh;
    gap: 32px;
    padding-top: 124px;
  }

  .status-panel {
    max-width: 520px;
  }

  .signal-grid,
  .labs-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-section {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: absolute;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 8px;
    min-height: 118px;
    padding-top: 18px;
    padding-bottom: 16px;
  }

  .nav-links {
    justify-content: space-between;
    width: 100%;
    gap: 6px;
  }

  .nav-links a {
    min-height: 32px;
    padding: 0 4px;
    font-size: 0.84rem;
  }

  .hero,
  .section {
    width: min(100% - 32px, var(--max));
  }

  .hero {
    min-height: auto;
    gap: 24px;
    padding-top: 132px;
    padding-bottom: 28px;
  }

  h1 {
    font-size: 3.15rem;
  }

  h2 {
    font-size: 1.85rem;
  }

  .lead {
    font-size: 1.25rem;
  }

  .hero-text {
    font-size: 1rem;
  }

  .status-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
    max-width: none;
  }

  .status-panel::before {
    grid-column: 1 / -1;
    padding: 8px 14px;
  }

  .status-row {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    min-height: 64px;
    gap: 4px;
    padding: 10px 14px;
  }

  .status-row span {
    font-size: 0.72rem;
  }

  .status-row strong {
    font-size: 0.9rem;
  }

  .hero-actions,
  .contact {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .signal-grid,
  .labs-strip {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
  }
}