body {
    margin: 0;
    padding: 0;
    background-color: transparent;
    box-sizing: border-box;
}

#wrapper {
    padding: 2rem 2rem 4rem 2rem;
}

#btn_apply {
    margin-left: 2rem;
}

#hour_hide {
    margin-left: 2rem;
}

#div_timer {
    width: 340px;
    height: 100px;
    border-radius: 20%;

    font-family: monospace;
    font-size: 72px;

    background-color: black;
    color: white;

    display: flex;
    justify-content: center;
    align-items: center;
}

#display_hour::after {
    content: ":";
}

#display_min::after {
    content: ":";
}

#display_sec::after {
    content: "";
}

.hide {
    display: none;
}

h1 {
    margin-top: 4em;
}

h2 {
    margin-top: 2em;
}

input[type="range"] {
    accent-color: orange;
}

#input_joinId {
    width: 60px;
}

#input_joinId:valid {
    border-color: green;
    border-width: 4px;
}

#input_joinId:invalid {
    border-color: red;
    border-width: 4px;
}

#btn_join {
    margin-left: 1rem;
    margin-right: 1rem;
}

.invalid {
    opacity: 0.5;
}

.code-container {
    position: relative;
    max-width: 600px;
    margin: 20px 0;
    border-radius: 6px;
    background-color: #2d2d2d;
    color: #f8f8f2;
    padding: 1.5rem;
    font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New", monospace;
}

/* コピーボタンのスタイル */
.btn_copy {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 6px 12px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn_copy:hover {
    background-color: #45a049;
}

/* preタグの余白調整 */
.code-container pre {
    margin: 0;
    overflow-x: auto;
}

.footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: #222120;
    color: rgb(216, 209, 209);
    text-align: center;
    padding: 10px 0;
}

.footer a {
    color: orange;
}

.settings {
    margin-top: 2rem;
}

input[type="range"] {
    width: 60%;
}

.adArea {
    margin: 2em;
    display: flex;
    gap:20px;
}

table {
  border-collapse: collapse;
  border: 2px solid rgb(140 140 140);
  font-family: sans-serif;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

th,td {
  border: 1px solid rgb(160 160 160);
  padding: 8px 10px;
}

input[type="color"]{
    margin-right: 1em;
}