/* Section */
#section4 {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 50px 20px;
  color: #333;
  text-align: center;
  font-family: "Roboto", sans-serif;
  margin-bottom: 100px;
}

/* Title */
#section4 h2 {
  font-family: "Bebas Neue", cursive;
  font-size: 48px;
  margin-bottom: 10px;
  margin-top: 40px;
  letter-spacing: 2px;
  color: #333;
}

/* Layout dọc */
#section4 .skills-grid {
  display: flex;
  flex-direction: column;
  gap: 25px;
  width: 100%;
  max-width: 800px;
}

/* Card */
#section4 .skill-category {
  background: #fff; /* nổi bật trên beige */
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: left;
}

/* Hover */
#section4 .skill-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* Category Title */
#section4 .skill-category h3 {
  font-family: "Bebas Neue", cursive;
  font-size: 28px;
  margin-bottom: 15px;
  color: #145A32; /* xanh pastel */
  border-left: 5px solid #e07a5f;
  padding-left: 10px;
}

/* List */
#section4 .skill-category ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

#section4 .skill-category li {
  font-size: 16px;
  padding: 8px 15px;
  background: #fefcf9;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Icon */
#section4 .skill-category li img {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

/* =========================== */
/* Responsive cho tablet/mobiles */
/* =========================== */
@media (max-width: 1024px) {
    #section4 h2 {
        font-size: 40px;
    }

    #section4 .skills-grid {
        gap: 20px;
        max-width: 700px;
    }

    #section4 .skill-category {
        padding: 20px;
    }

    #section4 .skill-category h3 {
        font-size: 24px;
    }

    #section4 .skill-category li {
        font-size: 15px;
        padding: 6px 12px;
        gap: 6px;
    }

    #section4 .skill-category li img {
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 768px) {
    #section4 h2 {
        font-size: 32px;
    }

    #section4 .skills-grid {
        gap: 18px;
    }

    #section4 .skill-category {
        padding: 18px;
    }

    #section4 .skill-category h3 {
        font-size: 22px;
    }

    #section4 .skill-category li {
        font-size: 14px;
        padding: 5px 10px;
        gap: 5px;
    }

    #section4 .skill-category li img {
        width: 18px;
        height: 18px;
    }
}

@media (max-width: 480px) {
    #section4 h2 {
        font-size: 26px;
    }

    #section4 .skills-grid {
        gap: 15px;
    }

    #section4 .skill-category {
        padding: 15px;
        border-radius: 12px;
    }

    #section4 .skill-category h3 {
        font-size: 20px;
    }

    #section4 .skill-category ul {
        gap: 8px;
    }

    #section4 .skill-category li {
        font-size: 13px;
        padding: 4px 8px;
        gap: 4px;
    }

    #section4 .skill-category li img {
        width: 16px;
        height: 16px;
    }
}