/* General setup */

* {
    box-sizing: border-box;
}

html,body {
    font-family: sans-serif;
    line-height: 1.2rem;
}

/* Layout and styles */

h1 {
    color: green;
    margin-left: .5rem;
}

.description, .sign-verify {
    margin: 0 .5rem;
}

.description > p {
    margin-top: 0;
}

.sign-verify {
    box-shadow: -1px 2px 5px gray;
    padding: .2rem .5rem;
    margin-bottom: 2rem;
}

.sign-verify-controls > * {
    margin: .5rem 0;
}

input[type="button"] {
    width: 5rem;
}

.signature-value {
    padding-left: .5rem;
    font-family: monospace;
}

/* Validity CSS */
.valid {
    color: green;
}

.invalid {
    color: red;
}

.invalid::after {
    content: ' ✖';
}

.valid::after {
    content: ' ✓';
}

/* Whole page grid */
main {
    display: grid;
    grid-template-columns: 32rem 1fr;
    grid-template-rows: 4rem 1fr;
}

h1 {
    grid-column: 1/2;
    grid-row: 1;
}

.examples {
    grid-column: 1;
    grid-row: 2;
}

.description {
    grid-column: 2;
    grid-row: 2;
}

/* sign-verify controls grid */
.sign-verify-controls {
    display: grid;
    grid-template-columns: 1fr 5rem;
    grid-template-rows: 1fr 1fr;
}

.message-control {
    grid-column-start: 1;
    grid-row-start: 1;
}

.signature {
    grid-column-start: 1;
    grid-row-start: 2;
}

.sign-button {
    grid-column-start: 2;
    grid-row-start: 1;
}

.verify-button {
    grid-column-start: 2;
    grid-row-start: 2;
}

/* Animate output display */
.fade-in {
    animation: fadein .5s;
}

@keyframes fadein {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}