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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-brand);
  background: var(--dark);
  color: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

section {
  padding: var(--section-py) var(--section-px);
  position: relative;
}

.section-title {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--cyan);
  text-align: center;
  margin-bottom: 16px;
}

.section-sub {
  text-align: center;
  color: var(--text-dim);
  font-size: 1rem;
  margin-bottom: 60px;
  line-height: 1.6;
}

.section-headline {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  color: var(--white);
  text-align: center;
  margin-bottom: 60px;
}

.btn-dark {
  display: inline-block;
  padding: 16px 48px;
  background: rgba(10, 26, 46, 0.9);
  color: var(--white);
  border-radius: 40px;
  font-size: 1rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: background var(--t-med), box-shadow var(--t-med), transform var(--t-fast);
}

.btn-dark:hover {
  background: rgba(0, 20, 40, 1);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  section {
    padding: 80px 20px;
  }
}