/* ================= Base ================= */
*{
  box-sizing: border-box;
}

body{
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Inter",
               "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #2a2f36;
  background: #ffffff;
}

img{
  max-width: 100%;
  display: block;
}

/* ================= Layout ================= */
.container{
  width: 1100px;
  max-width: 92%;
  margin: 0 auto;
}

.section{
  padding: 120px 0;
}

.section-light{
  background: #fbfafa;
}

.section-title{
  font-size: 26px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 72px;
}

/* ================= Header ================= */
.site-header{
  height: 120px;
}

.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo{
  height: 40px;
}

.main-nav a{
  margin-left: 32px;
  text-decoration: none;
  color: #222;
  font-size: 14px;
  font-weight: 500;
}

.main-nav a:hover{
  color: #fb874f;
}

/* ================= Hero ================= */
.hero{
  height: 600px;
  background: url("../img/prodigy-robot-table-tennis.jpg") center / cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero h1{
  color: #fff;
  font-size: 22px;
  letter-spacing: 0.12em;
  margin-top: 24px;
}

/* ================= Series ================= */
.series-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 64px;
  text-align: center;
}

.series-grid h3{
  font-size: 18px;
}

.tag{
  font-size: 12px;
  color: #fb874f;
  margin-bottom: 12px;
}

/* ================= Projects ================= */
.project{
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  margin-bottom: 96px;
}

.project h3{
  font-size: 18px;
  margin-bottom: 16px;
}

/* ================= Legacy ================= */
.legacy-grid{
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
}

/* ================= Lessons ================= */
.lessons-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.lessons-grid article{
  background: #fff;
  padding: 40px;
  border-top: 3px solid #fb874f;
}

.lessons-grid h3{
  font-size: 16px;
  margin-bottom: 12px;
}

/* ================= Footer ================= */
.site-footer{
  padding: 60px 0;
  text-align: center;
  background: #414751;
  color: #fff;
  font-size: 13px;
}