table.css

.players {
    border-collapse: collapse;
    width: 100%;
}

.players tr:first-child {
    cursor: pointer;
}

.players tr.marked,
.players tr.marked input {
    background: gray;
    color: white;
}

.players td {
    border: 1px dotted;
    font: bold .8rem sans-serif;
    padding: 0 .15rem;
}

.players td:first-child {
    cursor: pointer;
    text-align: right;
}

.players td.centered {
    text-align: center;
}

.players input {
    border: none;
    box-sizing: border-box;
    font: .8rem sans-serif;
    width: 100%;
}

.players input[type="number"] {
    text-align: right;
}

.tournament-info {
    display: flex;
    font: bold .8rem sans-serif;
    margin: .5rem 0;
}

.tournament-info .tournament-name,
.tournament-info .tournament-place,
.tournament-info .chief-arbiter,
.tournament-info .tournament-rounds-count {
    margin: 0 .5rem;
}

.tournament-info .tournament-name {
    flex: .42;
    margin-left: 0;
}

.tournament-info .tournament-place {
    flex: .18;
}

.tournament-info .chief-arbiter {
    flex: .26;
}

.tournament-info .tournament-rounds-count {
    flex: .14;
    margin-right: 0;
    width: auto;
}

#tournament-name,
#tournament-place,
#chief-arbiter,
#tournament-rounds-count {
    border: 1px dotted;
    font: .8rem sans-serif;
    margin: .2em 0 0 0;
    padding: .15rem;
    width: 100%;
}

#tournament-rounds-count {
    text-align: right;
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    margin: .5rem 0;
}

.buttons > button {
    border: none;
    border-radius: 5%/1rem;
    color: white;
    cursor: pointer;
    flex: 30%;
    font: bold 1rem sans-serif;
    margin: .5rem 10%;
    outline: none;
    padding: .5rem;
}

button.invert-selection,
button.delete-selected {
    background: white;
    box-shadow: 0 0 .2rem gray;
    color: gray;
}

.invert-selection:hover {
    background: gray;
    box-shadow: 0 0 1rem gray;
    color: white;
}

.delete-selected:hover {
    background: pink;
    box-shadow: 0 0 1rem red;
    color: darkred;
}

.save {
    background: green;
    box-shadow: 0 0 .2rem green;
}

.save:hover {
    box-shadow: 0 0 1rem green;
}

.save:active {
    color: lightgreen;
}

.clean {
    background: darkred;
    box-shadow: 0 0 .2rem darkred;
}

.clean:hover {
    box-shadow: 0 0 1rem darkred;
}

.clean:active {
    color: red;
}

.message-board {
    position: fixed;
    right: 0;
    top: 0;
    width: 33%;
}

.message {
    background: blue;
    border-radius: 5%/1rem;
    box-shadow: 0 0 .5rem white;
    color: white;
    cursor: pointer;
    font: 1rem sans-serif;
    margin-bottom: .1rem;
    padding: .5rem 2rem;
}

.message.error {
    background: darkred;
}

.message.success {
    background: green;
}

#autocomplete {
    background: white;
    border-collapse: collapse;
    margin-bottom: 1rem;
    position: absolute;
}

#autocomplete tr {
    border: 1px solid green;
}

#autocomplete tr:hover,
#autocomplete tr.selected {
    background: green;
    color: white;
    cursor: pointer;
}