/* Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #0f0f0f;
  color: #f0f0f0;
  line-height: 1.6;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1em 2em;
  background: #121212;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-size: 1.5em;
  font-weight: bold;
  color: #1db954;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.2em;
  align-items: center;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

nav select {
  background: #1e1e1e;
  color: #fff;
  border: none;
  padding: 0.4em;
  border-radius: 4px;
}

.hero {
  text-align: center;
  padding: 4em 2em;
  background: #181818;
}

.hero h1 {
  font-size: 2.5em;
  margin-bottom: 0.5em;
}

.hero p {
  font-size: 1.2em;
  margin-bottom: 1.5em;
}

.cta-button {
  background: #1db954;
  color: white;
  padding: 0.8em 1.8em;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
  font-size: 1em;
}

section {
  padding: 3em 2em;
  max-width: 900px;
  margin: auto;
}

section h2 {
  font-size: 2em;
  margin-bottom: 1em;
  text-align: center;
}

.plans {
  display: flex;
  flex-direction: column;
  gap: 1.5em;
}

.plan {
  background: #1e1e1e;
  padding: 1.5em;
  border-radius: 8px;
  text-align: center;
}

.plan button[disabled] {
  background: #555;
  color: #aaa;
  border: none;
  padding: 0.75em 1.5em;
  border-radius: 4px;
  font-weight: bold;
  margin-top: 1em;
}

form input, form textarea {
  width: 100%;
  margin-bottom: 1em;
  padding: 0.75em;
  border-radius: 4px;
  border: none;
  background: #2c2c2c;
  color: white;
}

form button {
  background: #1db954;
  color: white;
  padding: 0.75em 1.5em;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

footer {
  background: #121212;
  text-align: center;
  padding: 1.5em;
  font-size: 0.9em;
  color: #aaa;
}

footer a {
  color: #1db954;
  text-decoration: none;
  margin: 0 0.5em;
}

/* Responsive */
@media (min-width: 768px) {
  .plans {
    flex-direction: row;
    justify-content: center;
  }

  .plan {
    flex: 1;
    margin: 0 0.5em;
  }
}