body {
  margin: 0;
  font-family: 'Montserrat', sans-serif;
  background-color: #5E6F80;
  color: #ffffff !important;
}

h1,
h2,
p,
span,
a {
  color: #ffffff !important;
  /* set default */
}

/* 1. logo and app name */
header {
  display: flex;
  /* flexible layout */
  align-items: center;
  /* padding vertical: 20px, horizontal: 40px */
  padding: 20px 40px;
  /* background-color: #424242; */
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-left img {
  border-radius: 10px;
}

.app-icon {
  height: 48px;
  margin-right: 12px;
}

.app-name {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

/* 2. slogan and banner image */
.highlight {
  background-color: #A3B9CC;
  text-align: center;
  padding: 30px 20px;
}

.highlight h1 {
  font-size: 36px;
  margin: 0 0 10px;
}

.highlight p {
  font-size: 16px;
  margin: 0 0 40px;
}

.highlight img {
  max-width: 600px;
  width: 100%;
}

/* 3. store buttons: app store and google play */
.store-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  padding: 30px 20px;
  flex-wrap: wrap;
}

.store-buttons img {
  height: 60px;
  transition: transform 0.2s ease;
}

.store-buttons img:hover {
  transform: scale(1.05);
}

/* Note. section-wrapper dùng chung cho interface-wrapper, play-wrapper, level-wrapper */
.section-wrapper {
  max-width: 1024px;
  margin: 0 auto;
  /* Bắt buộc để hai cột nằm ngang */
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

/* 4. game interface text center */
.interface {
  padding: 30px 60px;
}

.interface h2 {
  margin: 0 0 12px;
  /* bỏ margin-top */
  font-size: 28px;
}

.interface-description {
  font-size: 18px;
  line-height: 1.8;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.interface-description strong {
  display: block;
  margin-top: 14px;
  font-weight: 700;
  color: #64B5F6;
  /* xanh dương */
}

.center-content {
  flex-direction: column;
  text-align: center;
  align-items: center;
}

/* 5. more games */
.more-games {
  background-color: #A3B9CC;
  padding: 30px 20px;
  text-align: center;
}

.more-games h2 {
  font-size: 28px;
  margin-bottom: 30px;
  color: #F0627E;
}

.game-icons {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.game-icons img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 20px;
  transition: transform 0.2s ease;
}

.game-icons img:hover {
  transform: scale(1.05);
}

/* 6. footer: emal & copyright */
.footer {
  /* background-color: #2C2C2C; */
  color: #FFFFFF;
  font-family: 'Montserrat', sans-serif;
  padding: 20px 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  font-size: 14px;
}

.footer a {
  color: #8ABEFF;
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.footer-email,
.footer-copy {
  margin: 5px 0;
}

/* 9. responsive */
@media (max-width: 768px) {
  .section-wrapper {
    flex-direction: column;
    text-align: center;
  }

  .interface {
    padding: 24px 16px;
  }
}