/* ============================================================
   endwell landing — dark, technical, North Sea
   ============================================================ */

:root {
  --bg: #060d14;
  --bg-2: #081522;
  --panel: #0b1826;
  --panel-2: #0e1e2e;
  --line: #16293b;
  --line-strong: #22394e;
  --ink: #dcebf3;
  --ink-dim: #a7bccb;
  --muted: #6f8798;
  --accent: #41e0c8;
  --accent-dim: rgba(65, 224, 200, 0.12);
  --warn: #f5b453;
  --warn-dim: rgba(245, 180, 83, 0.12);
  --font-display: "Space Grotesk", "Avenir Next", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --rail-w: 84px;
  --max-w: 1120px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* faint engineering-paper grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 120px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 120px 100%;
  opacity: 0.14;
  z-index: 0;
}

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

::selection {
  background: var(--accent);
  color: #05231f;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: -0.015em;
}

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--ink-dim);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.08em 0.4em;
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  background: var(--accent);
  color: #04211d;
  font-weight: 600;
  padding: 0.6em 1.2em;
  border-radius: 0 0 8px 8px;
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus {
  top: 0;
}

/* ============ buttons & chips ============ */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: #04211d;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 0.72em 1.5em;
  text-decoration: none;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(65, 224, 200, 0.25);
}
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: none;
}
.btn--small {
  padding: 0.5em 1.1em;
  font-size: 0.85rem;
}
.btn--big {
  padding: 0.9em 2em;
  font-size: 1.05rem;
}

.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 4px;
  padding: 0.2em 0.6em;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  vertical-align: middle;
}
.chip--ok {
  color: var(--accent);
  border-color: rgba(65, 224, 200, 0.4);
  background: var(--accent-dim);
}
.chip--warn {
  color: var(--warn);
  border-color: rgba(245, 180, 83, 0.4);
  background: var(--warn-dim);
}
.chip--live {
  color: var(--accent);
  border-color: rgba(65, 224, 200, 0.4);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
}

/* ============ depth rail ============ */

.depth-rail {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--rail-w);
  height: 100vh;
  z-index: 40;
  pointer-events: none;
}
.depth-rail__line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40px;
  width: 1px;
  background: repeating-linear-gradient(
    to bottom,
    var(--line-strong) 0 1px,
    transparent 1px 24px
  );
}
.depth-rail__line::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 119px,
    var(--line-strong) 119px 120px
  );
  width: 9px;
  left: -4px;
}
.depth-rail__marker {
  position: absolute;
  left: 33px;
  top: 0;
  width: 15px;
  height: 15px;
  transition: top 0.08s linear;
}
.depth-rail__marker::before {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(65, 224, 200, 0.8);
}
.depth-rail__readout {
  position: absolute;
  left: 22px;
  top: -3px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  white-space: nowrap;
}
.depth-rail__cap {
  position: absolute;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.depth-rail__cap--top {
  top: 8px;
}
.depth-rail__cap--bottom {
  bottom: 8px;
}

/* ============ nav ============ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.85rem clamp(1.2rem, 4vw, 3rem) 0.85rem calc(var(--rail-w) + 1rem);
  background: rgba(6, 13, 20, 0.78);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--line);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.nav__mark {
  width: 17px;
  height: 17px;
  display: block;
}

.nav__links {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
}
.nav__links a {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}
.nav__links a:hover,
.nav__links a.is-active {
  color: var(--ink);
}

/* ============ layout ============ */

.section,
.hero__inner,
.stats,
.footer__inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1.2rem, 4vw, 3rem);
}
main {
  padding-left: var(--rail-w);
}

.section {
  padding-block: clamp(5rem, 10vw, 8.5rem);
}

.section__head {
  max-width: 640px;
  margin-bottom: 3.2rem;
}
.section__head h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 600;
  line-height: 1.15;
  margin: 0.9rem 0 1.1rem;
}
.section__head p {
  color: var(--ink-dim);
  font-size: 1.05rem;
}

.depth-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.85;
}
.depth-tag--center {
  display: block;
  text-align: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.3rem;
}

/* ============ hero ============ */

.hero {
  padding-top: clamp(6.5rem, 12vh, 9rem);
  background:
    radial-gradient(
      1200px 500px at 70% -10%,
      rgba(46, 86, 112, 0.22),
      transparent 70%
    ),
    linear-gradient(var(--bg-2), var(--bg) 60%);
}
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.hero__title {
  font-size: clamp(2.4rem, 5.2vw, 4rem);
  font-weight: 700;
  line-height: 1.06;
  margin-bottom: 1.4rem;
}
.hero__title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}
.hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.08em;
  height: 2px;
  background: var(--accent);
  opacity: 0.6;
}
.hero__lede {
  color: var(--ink-dim);
  font-size: 1.1rem;
  max-width: 34rem;
  margin-bottom: 2rem;
}
.hero__lede strong {
  color: var(--ink);
}
.hero__lede .wordmark {
  font-style: normal;
  font-weight: 500;
  color: var(--ink);
}

/* domain-teaching: ".ai" always in accent, wherever the wordmark appears */
.tld {
  color: var(--accent);
}
.hero__ctas {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 2.2rem;
}

/* schematic */
.hero__schematic {
  position: relative;
}
.hero__schematic svg {
  width: 100%;
  height: auto;
  display: block;
}

.svg-label {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--muted);
  letter-spacing: 0.08em;
}
.svg-label--warm {
  fill: #b08a58;
}
.svg-well {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  fill: var(--ink);
  letter-spacing: 0.2em;
}
.svg-ticks line {
  stroke: #2b4a5e;
  stroke-width: 1;
}
.svg-ticks text {
  font-family: var(--font-mono);
  font-size: 9.5px;
  fill: var(--muted);
}
.casing {
  stroke: #4a708c;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
}
.sea-line {
  animation: bob 7s ease-in-out infinite alternate;
}
@keyframes bob {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(3px);
  }
}

.tag rect {
  fill: var(--panel);
  stroke: var(--line-strong);
  stroke-width: 1;
}
.tag text {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  fill: var(--muted);
}
.tag--ok rect {
  stroke: rgba(65, 224, 200, 0.45);
  fill: rgba(65, 224, 200, 0.07);
}
.tag--ok text {
  fill: var(--accent);
}
.tag--warn rect {
  stroke: rgba(245, 180, 83, 0.45);
  fill: rgba(245, 180, 83, 0.07);
}
.tag--warn text {
  fill: var(--warn);
}
.leader {
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 3 3;
}
.leader--ok {
  stroke: rgba(65, 224, 200, 0.5);
}
.leader--warn {
  stroke: rgba(245, 180, 83, 0.5);
}

.barrier {
  opacity: 0;
  animation: barrier-in 0.7s ease forwards;
}
.barrier--1 {
  animation-delay: 0.5s;
}
.barrier--2 {
  animation-delay: 1.1s;
}
.barrier--3 {
  animation-delay: 1.7s;
}
@keyframes barrier-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mono-caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-align: center;
  margin-top: 0.8rem;
}

.primer-link {
  display: inline-block;
  margin-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.primer-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* stats */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
  margin-top: clamp(3.5rem, 7vw, 5.5rem);
  padding-inline: 0;
}
.stat {
  background: var(--bg);
  padding: 1.8rem 1.6rem;
}
.stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.55rem;
}
.stat__label {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}
.stats__sources {
  max-width: var(--max-w);
  margin: 0.9rem auto 0;
  padding-inline: clamp(1.2rem, 4vw, 3rem);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  opacity: 0.75;
}

/* ============ cards ============ */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.8rem 1.7rem;
  transition:
    border-color 0.2s ease,
    transform 0.2s ease;
}
.card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0.8rem 0 0.7rem;
  line-height: 1.3;
}
.card p {
  font-size: 0.92rem;
  color: var(--ink-dim);
}
.card p em {
  color: var(--ink);
  font-style: normal;
}

.card__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--accent);
}
.card__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}
.cards--pillars .card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
}

/* ============ problem compare ============ */

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  overflow: hidden;
}
.compare__col {
  min-width: 0;
  padding: 1.9rem 2.1rem 1.8rem;
}
.compare__col--endwell {
  border-left: 1px solid var(--line);
  background: linear-gradient(
    180deg,
    rgba(65, 224, 200, 0.05),
    transparent 60%
  );
}
.compare__head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.02rem;
  font-weight: 600;
  padding-bottom: 1.1rem;
  margin-bottom: 0.35rem;
  border-bottom: 1px solid var(--line);
}

.doc-list {
  list-style: none;
}
.doc-list li {
  display: grid;
  grid-template-columns: 3.4rem 1fr;
  gap: 0.95rem;
  align-items: baseline;
  padding-block: 0.82rem;
  border-bottom: 1px dashed var(--line);
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--ink-dim);
}
.doc-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  color: var(--warn);
  border: 1px solid rgba(245, 180, 83, 0.35);
  border-radius: 4px;
  padding: 0.22em 0.2em;
  text-align: center;
  align-self: center;
}
.compare__note {
  padding-top: 1.05rem;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--muted);
}

.graph-mock {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-2);
  margin-block: 1.1rem 0.35rem;
}
.graph-mock svg {
  width: 100%;
  height: auto;
  display: block;
}
.graph-mock__status {
  position: absolute;
  top: 10px;
  right: 13px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  opacity: 0.8;
}
.gm-edges line {
  stroke: var(--line-strong);
  stroke-width: 1.3;
}
.gm-node rect {
  fill: var(--panel-2);
  stroke: #4a708c;
  stroke-width: 1.4;
}
.gm-node--ok rect {
  stroke: var(--accent);
  fill: rgba(65, 224, 200, 0.07);
}
.gm-node text {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.07em;
  fill: var(--ink-dim);
  text-anchor: middle;
}
.gm-node--ok text {
  fill: var(--accent);
}

.check-list {
  list-style: none;
}
.check-list li {
  position: relative;
  padding: 0.82rem 0 0.82rem 1.6rem;
  border-bottom: 1px dashed var(--line);
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--ink-dim);
}
.check-list li:last-child {
  border-bottom: none;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.82rem;
  color: var(--accent);
  font-weight: 600;
}
.check-list strong {
  color: var(--ink);
  font-weight: 600;
}

/* ============ traceability chain ============ */

.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  margin-top: 3.2rem;
  padding: 1.5rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-2);
}
.chain__step {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  padding: 0.4em 0.8em;
  background: var(--panel);
  white-space: nowrap;
}
.chain__step--ok {
  color: var(--accent);
  border-color: rgba(65, 224, 200, 0.5);
  background: var(--accent-dim);
}
.chain__arrow {
  color: var(--muted);
  font-size: 0.85rem;
}
.chain__caption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 1rem;
}

/* ============ terminal / demo ============ */

.terminal {
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--bg-2);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
  max-width: 780px;
  margin-inline: auto;
}
.terminal__bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.terminal__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line-strong);
}
.terminal__title {
  margin-left: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.terminal__body {
  padding: 1.4rem 1.5rem 1.6rem;
  display: grid;
  gap: 1.1rem;
}

.msg {
  display: flex;
  gap: 1rem;
  font-size: 0.88rem;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
}
.msg.is-shown {
  opacity: 1;
  transform: translateY(0);
}
.msg__time {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  padding-top: 0.2em;
}
.msg p {
  color: var(--ink-dim);
  min-width: 0;
}
.msg b {
  color: var(--ink);
  font-weight: 600;
}
.msg--bot b {
  color: var(--accent);
}
.msg--system p {
  color: var(--muted);
}
.msg__role {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1em 0.5em;
  margin-left: 0.3em;
}
.msg__meta {
  font-size: 0.78rem;
  color: var(--muted);
}
.mention {
  color: var(--accent);
  font-weight: 500;
}

.terminal__caption {
  max-width: 640px;
  margin: 1.6rem auto 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}

/* ============ why now ============ */

.why-list {
  list-style: none;
  display: grid;
  gap: 0;
  max-width: 780px;
}
.why-list li {
  display: flex;
  gap: 1.6rem;
  padding: 1.7rem 0;
  border-top: 1px solid var(--line);
}
.why-list li:last-child {
  border-bottom: 1px solid var(--line);
}
.why-list__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  padding-top: 0.25em;
}
.why-list h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.why-list p {
  font-size: 0.92rem;
  color: var(--ink-dim);
}

/* ============ contact ============ */

.section--contact {
  background: radial-gradient(
    900px 400px at 50% 110%,
    rgba(65, 224, 200, 0.08),
    transparent 70%
  );
}
.contact {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
}
.contact h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 600;
  margin: 1.1rem 0 1.2rem;
}
.contact > p {
  color: var(--ink-dim);
  font-size: 1.02rem;
}
.contact__ctas {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.2rem;
}
.contact__note {
  margin-top: 1.8rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.contact__mail {
  color: var(--accent);
  text-decoration: none;
}
.contact__mail:hover {
  text-decoration: underline;
}

/* ============ sign-off ============ */

.signoff {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(4.5rem, 10vw, 8rem) clamp(1.2rem, 4vw, 3rem)
    clamp(3rem, 6vw, 5rem);
  text-align: center;
  border-top: 1px solid var(--line);
}
.signoff__mark {
  width: 58px;
  height: 58px;
  display: block;
  margin: 0 auto 1.8rem;
}
.signoff__word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 11vw, 8rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.signoff__tag {
  margin-top: 1.4rem;
  font-size: 1rem;
  color: var(--muted);
}

/* ============ footer ============ */

.footer {
  border-top: 1px solid var(--line);
  padding-block: 2rem;
  margin-left: var(--rail-w);
}
.footer__inner {
  display: flex;
  align-items: baseline;
  gap: 1.4rem;
  flex-wrap: wrap;
}
.footer__brand {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--ink);
}
.footer__tag {
  font-size: 0.82rem;
  color: var(--muted);
}
.footer__right {
  margin-left: auto;
  display: flex;
  align-items: baseline;
  gap: 1.4rem;
}
.footer__social {
  display: flex;
  gap: 1rem;
}
.footer__social a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
}
.footer__social a:hover {
  color: var(--accent);
}
.footer__meta {
  font-size: 0.78rem;
  color: var(--muted);
}

/* ============ reveal on scroll ============ */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal,
  .msg {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .barrier {
    animation: none;
    opacity: 1;
  }
  .sea-line {
    animation: none;
  }
  .chip--live {
    animation: none;
  }
}

/* ============ responsive ============ */

@media (max-width: 1080px) {
  .cards {
    grid-template-columns: minmax(0, 1fr);
    max-width: 620px;
  }
}

@media (max-width: 960px) {
  :root {
    --rail-w: 0px;
  }
  .depth-rail {
    display: none;
  }
  .nav {
    padding-left: clamp(1.2rem, 4vw, 3rem);
  }
  .nav__links {
    display: none;
  }
  .nav__brand {
    margin-right: auto;
  }
  .hero__inner {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero__schematic {
    max-width: min(460px, 100%);
    margin-inline: auto;
  }
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .compare {
    grid-template-columns: minmax(0, 1fr);
  }
  .compare__col--endwell {
    border-left: none;
    border-top: 1px solid var(--line);
  }
  .footer {
    margin-left: 0;
  }
}

@media (max-width: 540px) {
  .stats {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero__title {
    font-size: 2.2rem;
  }
  .eyebrow {
    letter-spacing: 0.08em;
  }
  .why-list li {
    flex-direction: column;
    gap: 0.5rem;
  }
  .why-list li > div {
    min-width: 0;
  }
  .contact__ctas {
    flex-direction: column;
    align-items: stretch;
  }
  code {
    white-space: normal;
    overflow-wrap: anywhere;
  }
}