/* Week 5 - Turn 2 - Mã đề H: Đăng ký tham gia trại hè */
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", Arial, sans-serif; background: #f7fee7; color: #365314; }
header.trang-header { background: #4d7c0f; color: #ffffff; padding: 22px 28px; }
header.trang-header h1 { margin: 0 0 6px; font-size: 1.5rem; }
header.trang-header p { margin: 0; color: #ecfccb; }
nav.dieu-huong-nho { padding: 10px 28px; background: #ecfccb; }
nav.dieu-huong-nho a { color: #4d7c0f; margin-right: 14px; text-decoration: none; font-weight: 600; }
nav.dieu-huong-nho a:hover { text-decoration: underline; }
main { max-width: 980px; margin: 0 auto; padding: 24px 20px 48px; }
div.khung-de-bai, article.kiem-thu-a11y {
  background: #ffffff; border: 1px solid #d9f99d; border-radius: 8px; padding: 18px 22px; margin-bottom: 22px;
}
div.khung-de-bai h2, article.kiem-thu-a11y h2 { color: #4d7c0f; margin-top: 0; }
form.form-trai-he { background: #ffffff; border: 1px solid #d9f99d; border-radius: 10px; padding: 22px; margin-bottom: 22px; }
figure.bieu-tuong-trai-he {
  margin: 0 0 20px; background: #f7fee7; border: 1px solid #bef264; border-radius: 8px; padding: 14px 18px;
}
figure.bieu-tuong-trai-he figcaption h3 { margin: 0; color: #4d7c0f; font-size: 1.05rem; }
.khung-trai-sinh { display: flex; flex-wrap: wrap; gap: 20px; }
section.khoi-phu-huynh, section.khoi-the-chat, section.khoi-chuong-trinh {
  flex: 1 1 280px; border: 1px solid #a3e635; border-radius: 8px; padding: 16px; margin: 0; background: #f7fee7;
}
h4 { margin: 0 0 12px; font-size: 1rem; color: #4d7c0f; }
.truong-explicit, .truong-implicit { margin-bottom: 14px; display: flex; flex-direction: column; }
.truong-explicit label { margin-bottom: 5px; font-weight: 600; font-size: 0.9rem; }
.truong-explicit input, .truong-explicit textarea {
  padding: 8px 10px; border: 1px solid #bef264; border-radius: 6px; font-family: inherit; font-size: 0.95rem;
}
.truong-implicit label.nhan-long {
  font-weight: 600; font-size: 0.9rem; display: flex; flex-direction: column; gap: 6px; cursor: pointer;
}
.truong-implicit label.nhan-long input {
  padding: 8px 10px; border: 1px solid #bef264; border-radius: 6px; font-family: inherit; font-size: 0.95rem;
}
.truong-implicit input[type="color"] { padding: 2px; height: 38px; cursor: pointer; }
input:focus, textarea:focus {
  outline: none; border-color: #4d7c0f; box-shadow: 0 0 0 3px rgba(77, 124, 15, 0.25); background: #ffffff;
}
small.huong-dan { color: #4d7c0f; font-size: 0.82rem; margin-top: 4px; font-weight: normal; }
.nhom-radio, .nhom-checkbox { margin-bottom: 12px; display: flex; flex-direction: column; gap: 6px; }
.nhom-radio span, .nhom-checkbox span { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
.nhom-radio label, .nhom-checkbox label, label.xac-nhan-phu-huynh { font-weight: normal; font-size: 0.9rem; display: flex; align-items: center; gap: 6px; cursor: pointer; }
.nhom-radio input, .nhom-checkbox input, label.xac-nhan-phu-huynh input { cursor: pointer; }
.nhom-radio input:focus, .nhom-checkbox input:focus { outline: 2px solid #4d7c0f; }
footer.chan-form-trai { margin-top: 18px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 14px; }
label.xac-nhan-phu-huynh { font-weight: 600; color: #3f6212; }
.nut-gui {
  background: #4d7c0f; color: #ffffff; border: none; padding: 12px 28px;
  border-radius: 6px; font-size: 1rem; font-weight: 600; cursor: pointer;
}
.nut-gui:hover { background: #3f6212; }
.nut-gui:focus { outline: 3px solid #84cc16; outline-offset: 2px; }
article.kiem-thu-a11y h3 { color: #4d7c0f; }
article.kiem-thu-a11y blockquote {
  margin: 12px 0 0; padding: 10px 14px; background: #f7fee7; border-left: 4px solid #4d7c0f; font-style: italic; font-size: 0.9rem;
}
footer.trang-footer { text-align: center; padding: 16px; color: #4d7c0f; font-size: 0.85rem; }