@import url("https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap");

:root {
  --bg: #050505;
  --bg-card: #0f0f0f;
  --border: #ffffff1a;
  --text: #f5f5f5;
  --text-muted: #9ca3af;
  --accent: #9ae600;
  --accent-soft: #d4ff70;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

h1, h2, h3, .logo {
  font-family: "Chakra Petch", sans-serif;
  letter-spacing: 0.01em;
}

a {
  color: inherit;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.logo {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text);
}

.logo:hover {
  color: var(--accent);
}

.tagline {
  color: var(--text-muted);
  margin: 4px 0 0;
  font-size: 0.95rem;
}

.breadcrumb {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
}

.breadcrumb:hover {
  color: var(--accent);
}

.hero {
  padding: 60px 0 20px;
}

.hero h1 {
  font-size: 2.2rem;
  margin: 0 0 10px;
}

.hero p {
  color: var(--text-muted);
  max-width: 560px;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  padding: 30px 0 60px;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.course-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.course-image {
  aspect-ratio: 1 / 1;
  background: #0a0a0a;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.course-card h2 {
  margin: 0;
  padding: 18px 20px 22px;
  font-size: 1.1rem;
  font-weight: 600;
  border-top: 1px solid var(--border);
}

/* página de curso */
.course-page-header {
  padding: 50px 0 30px;
}

.course-page-header h1 {
  font-size: 2rem;
  margin: 14px 0 0;
}

.course-content {
  padding: 10px 0 80px;
}

.lessons-placeholder {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  color: var(--text-muted);
  text-align: center;
}

.lesson-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.lesson {
  border-bottom: 1px solid var(--border);
}

.lesson summary {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
}

.lesson summary::-webkit-details-marker {
  display: none;
}

.lesson summary::after {
  content: "+";
  margin-left: auto;
  color: var(--text-muted);
  font-family: "Chakra Petch", sans-serif;
  font-size: 1.1rem;
}

.lesson details[open] summary::after {
  content: "\2212";
}

.lesson:hover summary {
  color: var(--accent);
}

.lesson-number {
  font-family: "Chakra Petch", sans-serif;
  color: var(--accent);
  font-weight: 600;
  width: 2ch;
  flex-shrink: 0;
}

.lesson-title {
  flex: 1;
}

.lesson-materials {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 4px 20px calc(2ch + 20px);
}

.material-link {
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 9999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.material-link:not(.is-pending):hover {
  border-color: var(--accent);
  color: var(--accent);
}

.material-link.is-pending {
  opacity: 0.4;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 9999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: opacity 0.15s ease;
}

.btn:hover {
  opacity: 0.85;
}

.btn-accent {
  background: var(--accent);
  color: #050505;
}

.site-footer {
  text-align: center;
  padding: 30px 0;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}