:root {
  --blue: #5ecee8;
  --yellow: #f7f533;
  --black: #0b0b0b;
  --white: #ffffff;
  --muted: #55595c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 880px; margin: 0 auto; padding: 0 24px; }

h1, h2 { line-height: 1.15; margin: 0; letter-spacing: -0.02em; }

/* brand */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 28px 0 0;
  font-weight: 700;
  font-size: 1.1rem;
  white-space: nowrap;
}
.brand img { height: 16px; width: auto; display: block; }
.brand i { font-style: normal; font-weight: 400; color: var(--muted); margin: 0; }

/* hero */
.hero { padding: 64px 0 64px; }
h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); max-width: 16em; }
mark {
  background: linear-gradient(transparent 55%, var(--yellow) 55%);
  color: inherit;
  padding: 0 2px;
}
.lead { font-size: 1.2rem; color: var(--muted); max-width: 34em; margin: 24px 0 36px; }

.btn {
  display: inline-block;
  padding: 16px 28px;
  white-space: nowrap;
  background: var(--yellow);
  color: var(--black);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  border: 2px solid var(--black);
  border-radius: 10px;
  box-shadow: 4px 4px 0 var(--black);
  transition: transform .12s, box-shadow .12s;
}
.btn:hover { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--black); }
.btn:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.note { margin: 20px 0 0; font-size: 0.9rem; color: var(--muted); }

/* gains */
.gains {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-bottom: 64px;
}
.gains article {
  background: var(--blue);
  border: 2px solid var(--black);
  border-radius: 14px;
  padding: 24px;
}
.num { font-weight: 800; font-size: 0.85rem; letter-spacing: 0.08em; }
.gains h2 { font-size: 1.3rem; margin: 8px 0 8px; }
.gains p { margin: 0; }

/* steps */
.steps-wrap { padding: 8px 0 64px; }
.steps-wrap h2, .about h2 { font-size: 1.6rem; margin-bottom: 20px; }
.steps { list-style: none; counter-reset: s; margin: 0; padding: 0; display: grid; gap: 14px; }
.steps li {
  counter-increment: s;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 1.1rem;
}
.steps li::before {
  content: counter(s);
  flex: none;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: var(--black);
  color: var(--yellow);
  font-weight: 800;
  border-radius: 50%;
}

/* about */
.btn-blue { margin-top: 24px; background: var(--blue); border-color: var(--blue); box-shadow: none; padding: 12px 22px; font-size: 1rem; white-space: normal; }
.btn-blue:hover { transform: none; box-shadow: none; background: var(--white); border-color: var(--white); }
.about {
  background: var(--black);
  color: var(--white);
  border-radius: 16px;
  padding: 40px;
  margin-bottom: 72px;
}
.about h2 { color: var(--blue); }
.about p { margin: 0; max-width: 40em; font-size: 1.05rem; color: #e6e6e6; }

footer { border-top: 1px solid #e3e3e3; padding: 24px 0; font-size: 0.9rem; color: var(--muted); }
footer .container { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: flex-end; }
footer a { color: var(--black); }

@media (max-width: 720px) {
  .gains { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 48px; }
  .about { padding: 28px; }
}

@media (max-width: 420px) { .brand { font-size: 0.85rem; gap: 8px; } .brand img { height: 14px; } }