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

:root {
  --green: #204E27;
  --green-light: #2d6b36;
  --text: #1a1a1a;
  --text-muted: #5a5a5a;
  --bg: #ffffff;
}

html, body {
  height: 100%;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 680px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

header {
  display: flex;
  justify-content: flex-start;
  padding-bottom: 0;
}

.logo {
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--text);
  letter-spacing: -0.01em;
}

.logo span {
  font-weight: 300;
}

.logo strong {
  font-weight: 700;
  color: var(--green);
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
  gap: 1.5rem;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  border: 1.5px solid var(--green);
  border-radius: 100px;
  padding: 0.3rem 0.9rem;
  width: fit-content;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
}

.sub {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 460px;
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.6rem;
  background: var(--green);
  color: #ffffff;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  width: fit-content;
  transition: background 0.2s;
}

.btn-whatsapp:hover {
  background: var(--green-light);
}

footer {
  text-align: left;
  color: #aaa;
  font-size: 0.8rem;
  padding-top: 1rem;
  border-top: 1px solid #ececec;
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.8rem;
  }

  .btn-whatsapp {
    width: 100%;
    justify-content: center;
  }
}