:root {
  --bg-main: #070f26;
  --text-main: #ffffff;
  --accent: #2596be;
  --card-bg: #0f1a3a;
}

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

body {
  font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

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

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

.header {
  padding: 3rem 0 2rem;
  background: radial-gradient(circle at top, #182a5a, #070f26 60%);
}

.header-content h1 {
  font-size: 2.4rem;
  margin-bottom: 0.5rem;
}

.header-content p {
  max-width: 600px;
  margin-bottom: 1.5rem;
}

.header-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.section {
  padding: 2.5rem 0;
}

.section h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.section p {
  margin-bottom: 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background-color: var(--card-bg);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  margin-bottom: 1rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn.primary {
  background-color: var(--accent);
  color: #ffffff;
}

.btn.primary:hover {
  background-color: #1f7da0;
}

.btn.secondary {
  background-color: transparent;
  border-color: var(--accent);
  color: var(--accent);
}

.btn.secondary:hover {
  background-color: rgba(37, 150, 190, 0.1);
}

.btn.small {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
}

.study-plan {
  list-style: none;
  padding-left: 0;
}

.study-plan li {
  margin-bottom: 0.4rem;
}

.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Responsivo */
@media (max-width: 600px) {
  .header-content h1 {
    font-size: 2rem;
  }
}
.video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  border-radius: 10px;
  overflow: hidden;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}