html {
	scroll-behavior: smooth;
}
body {
	margin: 0;
	height: 100vh;
	font-family: Ubuntu, sans-serif;
}

* { box-sizing: border-box;}

*::selection {
	background-color: inherit;
	color: inherit;
}

button {
	white-space: nowrap;
}

a {
	color: inherit;
	text-decoration: none;
	white-space: nowrap;
}

h1, h2, h3, h4, p {
	margin: 0;
}

strong { padding: 0; }

.info {
	width: 100%;
}

p.duration {
	width: 100%;
	height: 60px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-left: 32px;
	background-color: rgb(73, 150, 73);
	color: white;
	font-family: monospace;
	font-size: 24px;
}

.times {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 60px;
	flex-shrink: 0;
	flex-basis: 60px;
	height: 60px;
	font-size: 28px;
	font-weight: bolder;
	background-color: transparent;
	cursor: pointer;
}

.times:hover {
	background-color: rgba(29, 29, 29, 0.151);
}

#container {
	width: 100%;
	height: 100%;
	position: relative;
}

/* ...................................... */

.header {
	width: 100%;
	height: 140px;
	display: flex;
	flex-direction: column;
	justify-content: space-between;
	align-items: center;
	background-color: rgb(32, 32, 32);
	color: white;
	padding-left: 22px;
}

.header h1 {
	width: 100%;
	height: 70px;
	display: flex;
	justify-content: center;
	align-items: center;
	white-space: nowrap;
	text-align: center;
}

.header .options {
	width: 100%;
	height: 70px;
	display: flex;
	justify-content: center;
	align-items: center;
}

.options button, .helper button {
	margin: 0 12px;
	border: 1px solid transparent;
	padding: 0 12px;
	text-transform: uppercase;
	background-color: transparent;
	color: white;
	cursor: pointer;
}

.options button.disable {
	color: rgba(192, 192, 192, 0.322);
}

.main {
	width: 100%;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	position: relative;
}

.main > * {
	flex-shrink: 0;
	flex-grow: 0;
	margin: 0 !important;
	margin-top: 30px !important;
}

/* GRID */

.grid {
	border-collapse: separate;
}

.grid tr {
	display: flex;
}

.grid td {
	width: 11.1vw;
	height: 11.1vw;
	border: 1px solid rgba(0, 0, 0, 0.103);
	display: flex;
	justify-content: center;
	align-items: center;
	font-size: 26px;
	transition: background-color .3s;
}

.grid td[data-value="0"] {
	color: transparent !important;
}

.grid td.bold-border-right {
	border-right: 1px solid rgb(88, 88, 88);
}

.grid td.bold-border-bottom {
	border-bottom: 1px solid rgb(88, 88, 88);
}
.grid td:hover {
	background-color: rgba(192, 192, 192, 0.315);
}

.grid td.click {
	background-color: rgba(41, 90, 226, 0.315);
	border: 3px solid rgb(0, 119, 255);
	color: white;
}
.grid td.use {
	background-color: rgb(41, 91, 226) !important;
	color: white;
}

/* CHOICE */

.choice {
	height: 11.1vw;
	border-collapse: collapse;
	margin: auto;
	background-color: #fff;
	border: 1px solid silver;
	display: flex;
	align-items: center;
}

.choice button {
	padding: 0;
	width: 11.1vw;
	height: 11.1vw;
	border: 1px solid transparent;
	background-color: transparent;
	font-size: 22px;
	border-right: 1px solid rgb(121, 121, 121);
}

.choice button:last-child {
	border-right-color: transparent;
}

.choice button:hover {
	background-color: rgba(192, 192, 192, 0.24);
}

/* HELPER */

.helper {
	width: 100%;
	height: 100%;
}

.helper .helper-header {
	width: 100%;
	height: 70px;
	padding: 0 22px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	background-color: rgb(4, 95, 199);
	color: white;
}

.helper .helper-content {
	width: 100%;
	height: calc(100% - 70px);
	padding: 32px;
}

.image {
	width: 400px;
	border: 1px solid silver;
	margin-top: 22px;
}

.image img {
	width: 100%;
	height: auto;
}

.helper ul {
	margin: 0;
	padding-left: 15px;
}

.helper li {
	padding: 8px 12px;
}

@media only screen and (min-width: 550px) {
	.header {
		height: 70px;
		flex-direction: row;
	}
	.grid td {
		width: 60px;
		height: 60px;
	}
	.choice {
		height: 60px;
	}
	.choice button {
		width: 60px;
		height: 60px;
	}
	.main {
		height: calc(100vh - 70px);
	}
}