:root {
  --tsa-signal: #b8f7d4;
  --tsa-signal-soft: rgba(184, 247, 212, 0.12);
  --tsa-panel: rgba(255, 255, 255, 0.025);
  --tsa-line: rgba(255, 255, 255, 0.14);
}

[data-theme="light"] {
  --tsa-signal: #07643d;
  --tsa-signal-soft: rgba(7, 100, 61, 0.09);
  --tsa-panel: rgba(0, 0, 0, 0.025);
  --tsa-line: rgba(0, 0, 0, 0.16);
}

html {
  scroll-behavior: smooth;
}

.tsa-page {
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 50px 50px;
  line-height: 1.5;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--bg);
  background: var(--text);
  transform: translateY(-160%);
}

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

.tsa-brand {
  min-width: max-content;
}

.tsa-mark {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.tsa-brand-detail {
  font-family: monospace;
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.tsa-page main {
  width: min(100%, 1600px);
  margin-inline: auto;
}

.tsa-hero {
  min-height: calc(100vh - 100px);
  margin-top: 100px;
  padding: clamp(70px, 9vw, 140px) 40px 80px;
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(290px, 0.55fr);
  gap: clamp(48px, 8vw, 130px);
  align-items: center;
  border-bottom: 1px solid var(--tsa-line);
}

.tsa-kicker,
.tsa-section-label,
.engagement-meta,
.service-number {
  font-family: monospace;
  font-size: 0.76rem;
  color: var(--tsa-signal);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tsa-hero h1 {
  max-width: 1040px;
  margin: 22px 0 30px;
  font-size: clamp(3.9rem, 7.4vw, 8.6rem);
  line-height: 0.82;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.tsa-hero-lead {
  max-width: 750px;
  font-size: clamp(1.05rem, 1.4vw, 1.35rem);
  line-height: 1.7;
  color: var(--text);
  opacity: 0.74;
}

.tsa-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 28px;
  margin-top: 44px;
}

.tsa-text-link {
  color: var(--text);
  font-family: monospace;
  font-size: 0.82rem;
  text-decoration: none;
  border-bottom: 1px solid var(--tsa-line);
  padding-bottom: 4px;
}

.tsa-signal-panel {
  position: relative;
  overflow: hidden;
  align-self: stretch;
  min-height: 450px;
  display: flex;
  align-items: flex-end;
  padding: 28px;
  background: var(--tsa-panel);
  border: 1px solid var(--tsa-line);
}

.tsa-signal-panel::before,
.tsa-signal-panel::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  pointer-events: none;
}

.tsa-signal-panel::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--tsa-signal);
  border-left: 2px solid var(--tsa-signal);
}

.tsa-signal-panel::after {
  right: -1px;
  bottom: -1px;
  border-right: 2px solid var(--tsa-signal);
  border-bottom: 2px solid var(--tsa-signal);
}

.tsa-signal-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(24vw, 280px);
  aspect-ratio: 1;
  border: 1px solid var(--tsa-line);
  border-radius: 50%;
  transform: translate(-50%, -69%);
}

.tsa-signal-orbit::before,
.tsa-signal-orbit::after {
  content: "";
  position: absolute;
  border: 1px solid var(--tsa-line);
  border-radius: 50%;
}

.tsa-signal-orbit::before {
  inset: 19%;
}

.tsa-signal-orbit::after {
  inset: 42%;
  background: var(--tsa-signal);
  border-color: var(--tsa-signal);
  box-shadow: 0 0 42px var(--tsa-signal-soft);
}

.tsa-signal-orbit span,
.tsa-signal-orbit span::before {
  position: absolute;
  background: var(--tsa-signal);
}

.tsa-signal-orbit span {
  top: 50%;
  left: -5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.tsa-signal-orbit span::before {
  content: "";
  top: calc(-50% - 1px);
  left: calc(50% - 1px);
  width: 1px;
  height: 280px;
  opacity: 0.35;
  transform: rotate(45deg);
  transform-origin: top;
}

.tsa-signal-panel dl {
  position: relative;
  z-index: 1;
  width: 100%;
  background: var(--header-bg);
  border-top: 1px solid var(--tsa-line);
}

.tsa-signal-panel dl > div {
  display: grid;
  grid-template-columns: 0.45fr 1fr;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--tsa-line);
  font-family: monospace;
  font-size: 0.7rem;
}

.tsa-signal-panel dt {
  color: var(--accent);
}

.tsa-signal-panel dd {
  margin: 0;
  text-align: right;
}

.tsa-status {
  color: var(--tsa-signal);
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 12px currentColor;
}

.tsa-section {
  padding: clamp(90px, 10vw, 150px) 40px;
  border-bottom: 1px solid var(--tsa-line);
}

.tsa-section-heading {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 40px;
  margin-bottom: 70px;
}

.tsa-section-heading h2,
.tsa-intro h2,
.tsa-booking h2 {
  max-width: 900px;
  font-size: clamp(2.4rem, 5vw, 5.7rem);
  line-height: 0.95;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.tsa-intro {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 40px;
}

.tsa-prose-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 46px;
  margin-top: 50px;
}

.tsa-prose-grid p,
.tsa-service-card p,
.tsa-method-grid p,
.tsa-engagement-list p,
.tsa-booking-copy > p {
  color: var(--text);
  opacity: 0.7;
  line-height: 1.75;
}

.tsa-service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.tsa-service-card {
  min-height: 330px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--tsa-line);
  border-right: 1px solid var(--tsa-line);
  border-bottom: 1px solid var(--tsa-line);
  background: var(--tsa-panel);
  transition: background-color 180ms ease, transform 180ms ease;
}

.tsa-service-card:nth-child(1),
.tsa-service-card:nth-child(3) {
  border-left: 1px solid var(--tsa-line);
}

.tsa-service-card:nth-child(n + 3) {
  border-top: 0;
}

.tsa-service-card--wide {
  grid-column: span 2;
}

.tsa-service-card:hover {
  z-index: 1;
  background: var(--tsa-signal-soft);
  transform: translateY(-4px);
}

.tsa-service-card h3 {
  margin: auto 0 18px;
  font-size: clamp(1.65rem, 2.7vw, 3rem);
  line-height: 1;
}

.tsa-service-card p {
  max-width: 620px;
}

.tsa-method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  list-style: none;
  border-top: 1px solid var(--tsa-line);
}

.tsa-method-grid li {
  min-height: 310px;
  padding: 30px;
  border-right: 1px solid var(--tsa-line);
}

.tsa-method-grid li:first-child {
  border-left: 1px solid var(--tsa-line);
}

.tsa-method-grid li > span {
  font-family: monospace;
  color: var(--tsa-signal);
}

.tsa-method-grid h3 {
  margin: 105px 0 16px;
  font-size: 2rem;
}

.tsa-engagement-list {
  border-top: 1px solid var(--tsa-line);
}

.tsa-engagement-list article {
  display: grid;
  grid-template-columns: 0.45fr 0.8fr 1.35fr;
  gap: 38px;
  align-items: baseline;
  padding: 36px 0;
  border-bottom: 1px solid var(--tsa-line);
}

.tsa-engagement-list h3 {
  font-size: clamp(1.5rem, 2.5vw, 2.8rem);
  line-height: 1;
}

.tsa-booking {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: clamp(60px, 9vw, 140px);
  align-items: end;
  background: var(--tsa-signal-soft);
}

.tsa-booking h2 {
  margin: 24px 0 32px;
}

.tsa-booking-copy > p {
  max-width: 720px;
  font-size: 1.05rem;
}

.tsa-calendar-button {
  min-height: 170px;
  padding: 26px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  color: var(--bg);
  background: var(--text);
  text-decoration: none;
  font-family: monospace;
  font-weight: 700;
  transition: transform 180ms ease;
}

.tsa-calendar-button:hover {
  transform: translateY(-5px);
}

.tsa-calendar-button svg {
  width: 48px;
  flex: 0 0 48px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.tsa-booking-action p {
  margin-top: 14px;
  color: var(--accent);
  font-family: monospace;
  font-size: 0.7rem;
  line-height: 1.6;
}

.tsa-footer {
  max-width: 1600px;
  margin-inline: auto;
}

@media (max-width: 1120px) {
  .tsa-hero {
    grid-template-columns: 1fr;
  }

  .tsa-signal-panel {
    min-height: 380px;
  }

  .tsa-signal-orbit {
    width: 260px;
  }

  .tsa-engagement-list article {
    grid-template-columns: 0.45fr 1fr;
  }

  .tsa-engagement-list article p {
    grid-column: 2;
  }
}

@media (max-width: 780px) {
  html {
    scroll-behavior: auto;
  }

  .tsa-brand-detail {
    display: none;
  }

  .tsa-page header nav {
    background-color: var(--bg) !important;
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
  }

  .tsa-hero {
    min-height: auto;
    margin-top: 84px;
    padding: 84px 20px 60px;
  }

  .tsa-hero h1 {
    font-size: clamp(3.3rem, 15vw, 5rem);
    line-height: 0.86;
  }

  .tsa-hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .tsa-signal-panel {
    min-height: 340px;
    padding: 20px;
  }

  .tsa-signal-orbit {
    width: 220px;
  }

  .tsa-section,
  .tsa-intro {
    padding: 78px 20px;
  }

  .tsa-section-heading,
  .tsa-intro,
  .tsa-booking {
    grid-template-columns: 1fr;
  }

  .tsa-section-heading {
    margin-bottom: 44px;
  }

  .tsa-prose-grid,
  .tsa-service-grid,
  .tsa-method-grid {
    grid-template-columns: 1fr;
  }

  .tsa-prose-grid {
    gap: 24px;
  }

  .tsa-service-card--wide {
    grid-column: auto;
  }

  .tsa-service-card,
  .tsa-service-card:nth-child(1),
  .tsa-service-card:nth-child(3) {
    min-height: 280px;
    border: 1px solid var(--tsa-line);
    border-bottom: 0;
  }

  .tsa-service-card:last-child {
    border-bottom: 1px solid var(--tsa-line);
  }

  .tsa-method-grid li,
  .tsa-method-grid li:first-child {
    min-height: auto;
    border: 1px solid var(--tsa-line);
    border-top: 0;
  }

  .tsa-method-grid li:first-child {
    border-top: 1px solid var(--tsa-line);
  }

  .tsa-method-grid h3 {
    margin-top: 55px;
  }

  .tsa-engagement-list article {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .tsa-engagement-list article p {
    grid-column: auto;
  }

  .tsa-booking {
    gap: 52px;
  }

  .tsa-calendar-button {
    min-height: 140px;
  }
}

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

  .tsa-service-card,
  .tsa-calendar-button {
    transition: none;
  }
}