/* ---------
Bài tập 1
--------- */
#Ex01 * {
  box-sizing: border-box;
  font-family: "Lato", Arial, sans-serif;
}

#Ex01 .container {
  border: 1px solid #ddd;
  width: 500px;
  min-height: 650px;
  margin: 0 auto;
  padding: 25px 30px;
  display: flex;
  flex-direction: column;
  background-color: #fff;
}

#Ex01 h2 {
  font-family: "Lobster";
  font-size: 35px;
  margin-bottom: 10px;
}

#Ex01 p {
  color: #777;
  font-size: 14px;
  margin-bottom: 30px;
}

#Ex01 span {
  color: rgba(255, 0, 0, 0.7);
}

#Ex01 .item {
  margin-bottom: 15px;
}

#Ex01 .input {
  display: flex;
  align-items: stretch;
  border: 1px solid #ddd;
  background-color: #fff;
  transition: border-color 0.2s;
}

#Ex01 .icon-label {
  width: 45px;
  background-color: #e6e6e6;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 15px;
  border-right: 1px solid #ddd;
  transition: background-color 0.2s, color 0.2s;
}

#Ex01 input,
#Ex01 select {
  flex: 1;
  height: 40px;
  border: none;
  outline: none;
  padding: 0 12px;
  font-size: 14px;
  color: #555;
}

#Ex01 textarea {
  flex: 1;
  height: 120px;
  border: none;
  outline: none;
  padding: 12px;
  font-size: 14px;
  resize: none;
}

#Ex01 .input.message .icon-label {
  align-items: flex-start;
  padding-top: 12px;
}

#Ex01 .input:hover {
  border-color: #333;
}

#Ex01 .input:hover .icon-label {
  background-color: #333;
  color: #fff;
}

#Ex01 .input:focus-within {
  border-color: #333;
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

#Ex01 .input:focus-within .icon-label {
  background-color: #333;
  color: #fff;
}

#Ex01 .form-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#Ex01 .checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
}

#Ex01 .checkbox input {
  width: 16px;
  height: 16px;
}

#Ex01 .checkbox label {
  font-size: 12px;
  color: #777;
}

#Ex01 button {
  background-color: rgba(255, 0, 0, 0.7);
  color: white;
  border: none;
  padding: 8px 22px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.2s;
}

#Ex01 button:hover {
  background-color: rgba(255, 0, 0, 0.85);
}
/* ---------
Bài tập 2
--------- */

.ex02 {
  background-color: #ebf5fe;
  font-family: Arial, sans-serif;
}

#Ex02 .background {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px;
  column-gap: 30px;
  display: grid;
  grid-template-columns: repeat(3, 320px);
  row-gap: 20px;
  justify-content: center;
}

#Ex02 .item {
  width: 290px;
  height: 160px;
  border-radius: 9px;
  background-color: white;
  border: 1px solid none;
  padding-left: 20px;
  padding-right: 20px;
  padding-bottom: 20px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  color: gray;
}

#Ex02 h3 {
  color: #000000;
}

#Ex02 a {
  font-size: 12px;
  font-weight: bold;
  color: #3364d6;
  cursor: pointer;
  text-decoration: none;
}

#Ex02 .item:hover {
  border: 2px solid red;
  transform: translateY(-5px);
}

#Ex02 .icon {
  border: none;
  border-radius: 50%;
  padding: 9px;
  color: white;
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#Ex02 .header-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

#Ex02 .title {
  width: 120px;
  margin-bottom: 5px;
}

#Ex02 p {
  font-size: 14px;
  max-width: 280px;
  line-height: 18px;
}

#Ex02 .icon-1 {
  background-color: #ff8996;
}
#Ex02 .icon-2 {
  background-color: #05ae13;
}
#Ex02 .icon-3 {
  background-color: #df810b;
}
#Ex02 .icon-4 {
  background-color: #032cce;
}
#Ex02 .icon-5 {
  background-color: #c60aad;
}
#Ex02 .icon-6 {
  background-color: #11b821;
}
/* ---------
Bài tập 3
--------- */

#Ex03 .menu {
  display: flex;
  height: 50px;
  justify-content: space-between;
  margin: 15px 20px;
  padding: 15px 20px;
  border: none;
  border-radius: 20px;
  box-shadow: rgba(100, 100, 111, 0.5) 0px 7px 29px 0px;
  font-family: system-ui;
}
#Ex03 .selections {
  display: flex;
  justify-content: space-between;
}

#Ex03 img {
  height: 50px;
}

#Ex03 .logo {
  display: flex;
  align-items: center;
}

#Ex03 .category {
  margin-left: 20px;
  border: none;
  padding: 10px;
  border-radius: 15px;
  background-color: #e7e8ed;
  cursor: pointer;
}

#Ex03 .button {
  display: flex;
  justify-content: center;
  align-items: center;
}

#Ex03 button {
  cursor: pointer;
  border: none;
  padding: 10px;
  border-radius: 5px;
  color: white;
  background: linear-gradient(135deg, #276dd0 0%, #bc20ec 100%);
}

#Ex03 .selection {
  margin: 10px;
  font-weight: bold;
  cursor: pointer;
}

#Ex03 select {
  border: none;
}

#Ex03 button:hover {
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  font-size: 15px;
}

#Ex03 .category:hover {
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  font-size: 17px;
}