:root {
  --orange: #f79633;
  --orange-dark: #f18517;
  --gray-dark: #606060;
  --gray-med: #3f3f3f;
  --black: #000000;
  --white: #ffffff;
  --gray-bg: #f4f4f4;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Roboto", sans-serif;
  font-size: 19px;
  line-height: 1.9;
  color: var(--black);
  background: var(--white);
}

a { color: var(--orange); text-decoration: none; }
a:hover { color: var(--gray-dark); }

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

/* Topbar */
.topbar { background: var(--white); border-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 100; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 20px; flex-wrap: wrap; }

.brand { display: flex; flex-direction: column; font-weight: 900; font-size: 24px; color: var(--black); line-height: 1.1; }
.brand small { font-size: 12px; font-weight: 400; color: var(--gray-dark); }
.brand-badge { display: inline-block; background: var(--orange); color: var(--white); border-radius: 6px; padding: 0 6px; margin-right: 2px; }

.nav { display: flex; gap: 22px; flex-wrap: wrap; }
.nav a { font-weight: 500; font-size: 17px; color: var(--black); }
.nav a:hover { color: var(--orange); }
.nav a.active { color: var(--orange); border-bottom: 2px solid var(--orange); padding-bottom: 2px; }

a:focus-visible, button:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }

.skip-link { position: absolute; left: -9999px; top: 0; background: var(--black); color: var(--white); padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0; }
.skip-link:focus { left: 0; }

section[id], main [id] { scroll-margin-top: 90px; }

/* Buttons */
.btn { display: inline-block; padding: 13px 28px; border-radius: 8px; font-weight: 700; font-size: 16px; text-align: center; }
.btn-cta { background: var(--orange); color: var(--white); }
.btn-cta:hover { background: var(--orange-dark); color: var(--white); }
.btn-dark { background: var(--gray-dark); color: var(--white); }
.btn-dark:hover { background: var(--black); color: var(--white); }

/* Hero */
.hero { background: linear-gradient(135deg, #fff7ee 0%, #fff 60%); padding: 80px 0 60px; }
.hero-inner { max-width: 900px; }
.hero h1 { font-size: 44px; font-weight: 900; line-height: 1.2; margin-bottom: 20px; }
.hero p { font-size: 20px; color: #333; max-width: 700px; }
.hero-actions { display: flex; gap: 16px; margin: 30px 0 40px; flex-wrap: wrap; }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; max-width: 700px; }
.stat { background: var(--white); border: 1px solid #eee; border-radius: 12px; padding: 16px; text-align: center; box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.stat strong { display: block; font-size: 30px; color: var(--orange); font-weight: 900; }
.stat span { font-size: 14px; color: var(--gray-dark); }

/* Sections */
.section { padding: 70px 0; }
.section-gray { background: var(--gray-bg); }
.section-orange { background: var(--orange); color: var(--white); }
.section-orange h2 { color: var(--white); }
.section-orange p { color: #fff; font-size: 18px; margin: 10px 0 24px; }

.section h2 { font-size: 32px; font-weight: 900; margin-bottom: 12px; }
.section-orange h2 { color: var(--white); }
.subtitle { color: var(--gray-dark); margin-bottom: 36px; max-width: 720px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--white); border: 1px solid #eee; border-radius: 12px; padding: 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.05); transition: transform 0.2s ease, box-shadow 0.2s ease; }
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0,0,0,0.1); }
.card h3 { font-size: 20px; margin-bottom: 8px; color: var(--black); }
.card p { font-size: 16px; color: var(--gray-dark); }

/* Course list */
.course-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 36px; }
.course { background: var(--white); border: 1px solid #eee; border-radius: 10px; padding: 18px; display: flex; flex-direction: column; gap: 4px; box-shadow: 0 3px 10px rgba(0,0,0,0.05); }
.course strong { font-size: 17px; line-height: 1.3; }
.course small { color: var(--gray-dark); font-size: 14px; }
.tag { align-self: flex-start; background: var(--orange); color: var(--white); font-size: 12px; font-weight: 700; padding: 2px 10px; border-radius: 20px; margin-bottom: 6px; }

/* Footer */
.footer { background: var(--gray-dark); color: #f4f4f4; padding: 36px 0; }
.footer-inner { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.footer .brand { color: var(--white); }
.footer .brand small { color: #ddd; }
.footer a { color: var(--orange); }
.footer a:hover { color: #fff; }
.disclaimer { font-size: 14px; color: #ddd; }
.social { display: flex; gap: 18px; }
.social a { color: var(--white); font-size: 15px; }
.social a:hover { color: var(--orange); }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 32px; }
  .cards, .course-list { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .topbar-inner { flex-direction: column; align-items: flex-start; }
  .nav { gap: 14px; }
}

/* Acessibilidade: reduz movimento */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}