:root {
  /* Premium “middle-ground” charcoal (app-first) */
  --bg: #161a1d;

  /* Surfaces */
  --surface: rgba(255, 255, 255, 0.035);
  --surface-hero: rgba(255, 255, 255, 0.045);

  /* Border contrast reduced (8–10% opacity) */
  --border: rgba(255, 255, 255, 0.09);

  /* Text */
  --text: rgba(246, 247, 248, 0.92);
  --muted: rgba(246, 247, 248, 0.7);
  --muted2: rgba(246, 247, 248, 0.56);

  /* Accent (muted green) */
  --accent: #3f916c;
  --accent-soft: rgba(63, 145, 108, 0.16);
  --accent-border: rgba(63, 145, 108, 0.42);
  --focus-ring: rgba(63, 145, 108, 0.14);

  /* Geometry */
  --radius: 14px;
  --radius-pill: 999px;

  /* Layout */
  --max: 860px;
  --content: 760px;
  --pad: 22px;

  /* Spacing */
  --sp-1: 10px;
  --sp-2: 16px;
  --sp-3: 22px;
  --sp-4: 34px;
  --sp-5: 52px;
  --sp-6: 72px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 20px 48px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--sp-6);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  font-weight: 720;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 14px;
}

.pill {
  font-size: 12px;
  color: var(--muted2);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.02);
}

a {
  color: var(--muted2);
  text-decoration: none;
}
a:hover {
  color: var(--text);
}

main {
  max-width: var(--content);
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(40px, 5vw, 64px);
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.sub {
  margin: 0 0 var(--sp-4);
  font-size: 18px;
  color: var(--muted);
  max-width: 56ch;
}

.clarifier {
  margin: 0 0 28px;
  font-size: 15px;
  color: var(--muted2);
  max-width: 56ch;
}

/* Cards */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: var(--pad);
}

/* Glow only on hero */
.card.hero {
  background: var(--surface-hero);
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 28px 70px rgba(0, 0, 0, 0.35);
}

.card.hero::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: radial-gradient(900px 360px at 30% -10%, rgba(255, 255, 255, 0.07), transparent 60%),
    radial-gradient(760px 360px at 78% 10%, rgba(63, 145, 108, 0.14), transparent 62%);
  pointer-events: none;
  opacity: 0.9;
}

.card.hero > * {
  position: relative;
  z-index: 1;
}

.card-title {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--muted2);
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 10px;
  align-items: stretch;
}

/* Button matches landing */
.cta-btn {
  width: 100%;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  color: var(--text);
  font-weight: 650;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.16s ease, transform 0.05s ease;
  white-space: nowrap;
}

.cta-btn:hover {
  background: rgba(63, 145, 108, 0.24);
}

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

.cta-btn:focus {
  outline: none;
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.micro {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--muted2);
}

/* Sections */
.sections {
  margin-top: var(--sp-5);
  display: grid;
  gap: var(--sp-3);
}

.section-card {
  background: rgba(255, 255, 255, 0.03);
}

h2 {
  margin: 0 0 8px;
  font-size: 14px;
  letter-spacing: 0.01em;
  color: rgba(246, 247, 248, 0.9);
}

p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 72ch;
}

.subtle {
  margin-top: 10px;
  color: rgba(246, 247, 248, 0.68);
}

ul {
  margin: 10px 0 0 18px;
  padding: 0;
  color: var(--muted);
  font-size: 15px;
}

li {
  margin: 6px 0;
}

.divider {
  margin-top: var(--sp-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

footer {
  margin-top: 18px;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted2);
  font-size: 13px;
}

/* Success micro-animation */
.success {
  display: none;
  margin-top: 12px;
  padding: 12px 12px;
  border-radius: 12px;
  border: 0.2px solid rgba(101, 133, 117, 0.1);
  background: rgba(102, 137, 120, 0.1);
  color: rgba(246, 247, 248, 0.9);
  font-size: 13px;
  line-height: 1.4;

  opacity: 0;
  transform: translateY(-3px);
  transition: opacity 220ms ease, transform 220ms ease;
}

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

.success-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 8px;
  border-radius: 50%;
  background: rgba(117, 128, 124, 0.45);
  transform: translateY(-1px);
}

/* Button processing state */
.cta-btn.is-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.85;
}

.cta-btn .spinner {
  display: none;
  width: 14px;
  height: 14px;
  margin-left: 10px;
  border-radius: 999px;
  border: 2px solid rgba(246, 247, 248, 0.28);
  border-top-color: rgba(246, 247, 248, 0.85);
  animation: spin 700ms linear infinite;
  vertical-align: -2px;
}

.cta-btn.is-loading .spinner {
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 560px) {
  header {
    margin-bottom: 56px;
  }
  h1 {
    font-size: 44px;
  }
  .wrap {
    padding-top: 48px;
  }
}