:root {
  --navy: #0b1c2c;
  --navy-2: #132a3f;
  --green: #6db33f;
  --green-deep: #3d6b28;
  --copper: #e88a3c;
  --mist: #f3f6f9;
  --mist-2: #e7eef5;
  --graphite: #5a6b78;
  --ink: #14202b;
  --white: #ffffff;
  --radius: 2px;
  --max: 68rem;
  --font-display: "Sora", sans-serif;
  --font-label: "Space Grotesk", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --shadow: 0 18px 50px rgba(11, 28, 44, 0.18);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--mist);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--green-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--navy);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--white);
  padding: 0.5rem 1rem;
  z-index: 20;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: rgba(243, 246, 249, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(11, 28, 44, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
  font-family: var(--font-label);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.brand img {
  width: 2rem;
  height: 2rem;
}

.brand span {
  font-size: 0.92rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  font-family: var(--font-label);
  font-size: 0.88rem;
}

.nav a {
  color: var(--graphite);
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="true"] {
  color: var(--navy);
}

.hero {
  position: relative;
  min-height: min(92vh, 52rem);
  display: grid;
  align-items: end;
  padding: 4.5rem 1.25rem 3.5rem;
  color: var(--white);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 80% 20%, rgba(109, 179, 63, 0.35), transparent 55%),
    radial-gradient(ellipse 50% 40% at 15% 80%, rgba(232, 138, 60, 0.28), transparent 50%),
    linear-gradient(145deg, var(--navy) 0%, var(--navy-2) 48%, #16324a 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black 35%, transparent 95%);
  pointer-events: none;
  animation: grid-drift 28s linear infinite;
}

@keyframes grid-drift {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(48px);
  }
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max));
  margin: 0 auto;
}

.hero-mark {
  width: 3.4rem;
  height: 3.4rem;
  margin-bottom: 1.4rem;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.35));
  animation: rise 0.9s ease both;
}

.hero-brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  max-width: 12ch;
  animation: rise 0.9s ease 0.08s both;
}

.hero h1 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  max-width: 28ch;
  color: rgba(255, 255, 255, 0.92);
  animation: rise 0.9s ease 0.16s both;
}

.hero-lead {
  margin: 0 0 1.6rem;
  max-width: 38ch;
  font-size: 1.08rem;
  color: rgba(243, 246, 249, 0.84);
  animation: rise 0.9s ease 0.24s both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.9s ease 0.32s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-label);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--green);
  color: var(--navy);
}

.btn-primary:hover {
  background: #7bc24d;
  color: var(--navy);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-ghost:hover {
  border-color: var(--white);
  color: var(--white);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

section {
  padding: 3.5rem 0 1rem;
  scroll-margin-top: 4.5rem;
}

.section-label {
  margin: 0 0 0.55rem;
  font-family: var(--font-label);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--copper);
}

section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  max-width: 18ch;
}

.section-lead {
  margin: 0 0 1.75rem;
  max-width: 52ch;
  color: var(--graphite);
}

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

.clock {
  position: relative;
  padding: 1.25rem 1.2rem 1.35rem;
  background: var(--white);
  border: 1px solid rgba(11, 28, 44, 0.08);
  box-shadow: 0 1px 0 rgba(11, 28, 44, 0.03);
  overflow: hidden;
}

.clock::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--green), var(--copper));
}

.clock h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-label);
  font-size: 0.95rem;
  font-weight: 500;
}

.clock .age {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.03em;
  color: var(--navy);
}

.clock .start {
  margin: 0 0 0.65rem;
  font-size: 0.85rem;
  color: var(--graphite);
  font-family: var(--font-label);
}

.clock p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink);
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.stat {
  padding: 1rem 1.1rem;
  background: var(--navy);
  color: var(--white);
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat span {
  font-family: var(--font-label);
  font-size: 0.85rem;
  color: rgba(243, 246, 249, 0.78);
}

.explore-shell {
  display: grid;
  grid-template-columns: 14rem minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
  margin-top: 0.5rem;
}

.explore-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  position: sticky;
  top: 5rem;
}

.explore-tabs button {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  text-align: left;
  padding: 0.7rem 0.8rem;
  font-family: var(--font-label);
  font-size: 0.92rem;
  color: var(--graphite);
  cursor: pointer;
  border-radius: var(--radius);
}

.explore-tabs button:hover {
  background: var(--mist-2);
  color: var(--navy);
}

.explore-tabs button[aria-selected="true"] {
  background: var(--white);
  border-color: rgba(11, 28, 44, 0.1);
  color: var(--navy);
  box-shadow: var(--shadow);
}

.panel {
  display: none;
  padding: 1.35rem 1.4rem 1.5rem;
  background: var(--white);
  border: 1px solid rgba(11, 28, 44, 0.08);
  min-height: 22rem;
  animation: rise 0.45s ease both;
}

.panel.active {
  display: block;
}

.panel > p:first-child {
  margin-top: 0;
  color: var(--graphite);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--mist-2);
}

.timeline li {
  position: relative;
  padding: 0 0 1.35rem 1.2rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -0.42rem;
  top: 0.35rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(109, 179, 63, 0.18);
}

.timeline time {
  display: block;
  font-family: var(--font-label);
  font-size: 0.8rem;
  color: var(--copper);
  margin-bottom: 0.2rem;
}

.timeline h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.timeline p {
  margin: 0;
  color: var(--graphite);
}

.stack-grid,
.pattern-grid,
.lit-list {
  display: grid;
  gap: 0.85rem;
}

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

.stack-card,
.pattern-card,
.lit-card {
  padding: 1rem 1.05rem;
  background: var(--mist);
  border: 1px solid transparent;
  transition: border-color 160ms ease, transform 160ms ease;
}

.stack-card:hover,
.pattern-card:hover,
.lit-card:hover {
  border-color: rgba(109, 179, 63, 0.45);
  transform: translateY(-2px);
}

.stack-card h3,
.pattern-card h3,
.lit-card h3 {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.stack-card .sub,
.pattern-card .sub {
  margin: 0 0 0.45rem;
  font-family: var(--font-label);
  font-size: 0.8rem;
  color: var(--copper);
}

.stack-card p,
.pattern-card p,
.lit-card p {
  margin: 0;
  color: var(--graphite);
  font-size: 0.95rem;
}

.cap-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.cap-table th,
.cap-table td {
  text-align: left;
  vertical-align: top;
  padding: 0.75rem 0.55rem;
  border-bottom: 1px solid var(--mist-2);
}

.cap-table th {
  font-family: var(--font-label);
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--graphite);
}

.tag {
  display: inline-block;
  font-family: var(--font-label);
  font-size: 0.75rem;
  padding: 0.18rem 0.45rem;
  background: var(--mist-2);
  color: var(--navy);
  white-space: nowrap;
}

.tag.before-impossible,
.tag.before-uneconomic {
  background: rgba(232, 138, 60, 0.18);
}

.tag.now-solo-easy {
  background: rgba(109, 179, 63, 0.22);
}

.measure-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.measure-box {
  padding: 1.2rem 1.25rem;
  border: 1px solid rgba(11, 28, 44, 0.08);
  background: var(--white);
}

.measure-box h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.measure-box ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--graphite);
}

.measure-box.caution {
  background: var(--navy);
  color: var(--white);
  border-color: transparent;
}

.measure-box.caution ul {
  color: rgba(243, 246, 249, 0.82);
}

.measure-box.caution h3 {
  color: var(--copper);
}

.privacy-box {
  padding: 1.4rem 1.45rem;
  background: linear-gradient(135deg, var(--mist-2), var(--white));
  border-left: 3px solid var(--green);
}

.privacy-box h2 {
  max-width: none;
}

.site-footer {
  padding: 2rem 1.25rem 2.5rem;
  border-top: 1px solid rgba(11, 28, 44, 0.08);
  color: var(--graphite);
  font-size: 0.92rem;
}

.site-footer .inner {
  width: min(100%, var(--max));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.site-footer a {
  color: var(--navy);
}

@media (max-width: 860px) {
  .clock-grid,
  .stat-strip,
  .stack-grid,
  .measure-grid,
  .explore-shell {
    grid-template-columns: 1fr;
  }

  .explore-tabs {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .hero {
    min-height: auto;
    padding-top: 5.5rem;
  }

  .brand span {
    max-width: 12rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}