:root {
  --ink: #1a1d21;
  --ink-muted: #5c6570;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --accent: #0d6e63;
  --accent-hover: #0a574e;
  --accent-soft: rgba(13, 110, 99, 0.1);
  --nav-bg: #1f3d3a;
  --nav-ink: #e7f3f1;
  --nav-muted: #a7c7c2;
  --border: #d8dde3;
  --font-ui: 'IBM Plex Sans', system-ui, sans-serif;
  --font-display: 'Source Serif 4', Georgia, serif;
  --shadow: 0 18px 50px rgba(26, 29, 33, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, var(--accent-soft), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(31, 61, 58, 0.08), transparent 50%),
    var(--bg);
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

code {
  font-family: ui-monospace, 'Cascadia Code', monospace;
  font-size: 0.92em;
  background: #eef1f4;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: var(--nav-bg);
  color: var(--nav-ink);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--nav-ink);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.brand img {
  width: 2rem;
  height: 2rem;
  border-radius: 7px;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.brand:hover img {
  transform: rotate(-6deg) scale(1.06);
}

.topnav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.topnav a {
  color: var(--nav-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.topnav a:hover {
  color: var(--nav-ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-family: var(--font-ui);
  font-weight: 600;
  text-decoration: none;
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-small {
  padding: 0.4rem 0.85rem;
  background: transparent;
  color: var(--nav-ink) !important;
  border: 1px solid #3a6a64;
}

.btn-small:hover {
  background: rgba(255, 255, 255, 0.08);
}

.btn-primary {
  padding: 0.9rem 1.35rem;
  background: var(--accent);
  color: #fff !important;
  border: none;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 10px 24px rgba(13, 110, 99, 0.28);
}

.btn-ghost {
  padding: 0.9rem 1.2rem;
  background: transparent;
  color: var(--ink) !important;
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: #eef1f4;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
  width: min(1100px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 4.5rem 0 4rem;
  min-height: calc(100vh - 4.5rem);
}

.eyebrow {
  margin: 0 0 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-size: 1.15rem;
  color: var(--ink-muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.meta {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 320px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 45%, rgba(13, 110, 99, 0.18), transparent 60%),
    linear-gradient(160deg, #1f3d3a 0%, #0d6e63 100%);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-glow {
  position: absolute;
  width: 70%;
  height: 70%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(125, 204, 194, 0.35), transparent 70%);
  animation: glow-pulse 5.5s ease-in-out infinite;
  pointer-events: none;
}

.hero-logo {
  position: relative;
  z-index: 1;
  width: min(62%, 260px);
  height: auto;
  border-radius: 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  animation: logo-float 6s ease-in-out infinite;
}

.hero-enter {
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: calc(var(--d, 0) * 90ms + 80ms);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--d, 0) * 80ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-list li,
.steps li {
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.feature-list li:hover,
.steps li:hover {
  transform: translateX(4px);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes logo-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.55;
    transform: scale(0.95);
  }
  50% {
    opacity: 1;
    transform: scale(1.08);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-enter,
  .reveal,
  .hero-logo,
  .hero-glow,
  .btn,
  .brand img,
  .feature-list li,
  .steps li {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

.section {
  width: min(920px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 4rem 0;
}

.section-alt {
  width: 100%;
  padding-left: max(1.5rem, calc((100% - 920px) / 2));
  padding-right: max(1.5rem, calc((100% - 920px) / 2));
  background: var(--surface);
  border-block: 1px solid var(--border);
}

.section-alt > * {
  width: min(920px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  line-height: 1.15;
}

.section-lede {
  margin: 0 0 2rem;
  color: var(--ink-muted);
  font-size: 1.05rem;
  max-width: 40rem;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.feature-list li {
  display: grid;
  gap: 0.25rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--border);
}

.feature-list li:last-child {
  border-bottom: 1px solid var(--border);
}

.feature-list strong {
  font-size: 1.05rem;
}

.feature-list span {
  color: var(--ink-muted);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.steps p {
  margin: 0.2rem 0 0;
  color: var(--ink-muted);
}

.download-band {
  text-align: center;
  padding-bottom: 5rem;
}

.download-band .section-lede {
  margin-left: auto;
  margin-right: auto;
}

.footer {
  padding: 1.5rem;
  background: var(--nav-bg);
  color: var(--nav-muted);
  text-align: center;
  font-size: 0.92rem;
}

.footer a {
  color: #7dccc2;
}

.footer-note {
  margin: 0.4rem 0 0;
  opacity: 0.85;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 2.5rem;
  }

  .hero-visual {
    order: -1;
    min-height: 240px;
  }

  .topnav a:not(.btn) {
    display: none;
  }
}

@media (max-width: 520px) {
  .topbar {
    padding: 0.75rem 1rem;
  }

  .brand span {
    font-size: 0.95rem;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }
}