header {
    display: flex;
    flex-direction: column;
    border-bottom: solid 1px var(--border);
    padding: var(--padd);
}

a,
a:visited {
    color: var(--text);
    text-decoration: none;
}

.title-date {
    display: flex;
    align-items: baseline;
    gap: var(--padd);
}

date {
    font-size: x-small;
}

h1 {
    margin: 0;
    padding: 0;
    text-transform: uppercase;
    font-size: x-large;
}

header span {
    font-size: small;
}

main {
    display: flex;
    flex-wrap: wrap;
    gap: var(--padd);
    padding: var(--padd);
}

.day {
    display: flex;
    border: solid 1px var(--border);
    padding: var(--padd);
    position: relative;
    align-items: center;
    justify-content: center;
}

.day:hover {
    border: solid 1px var(--text);
    cursor: pointer;
}

.day .index {
    position: absolute;
    top: 1px;
    left: 1px;
    font-size: x-small;
    color: var(--border);
}

.day .theme {
    font-size: large;
    text-transform: uppercase;
    line-height: 2em;
}

.break {
    flex: 1 1 100%;
}

dialog {
    position: absolute;
    top: 100px;
    left: calc(50% - 150px);
    padding: 0;
    border-color: var(--text);
    resize: both;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
    width: 300px;
    height: 400px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 1;

    header {
        border-bottom: solid 1px var(--text);
        cursor: move;
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .close {
        width: 14px;
        height: 14px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        border: none;
        border-radius: 4px;
        font-size: 0.9rem;
        line-height: 1;
        cursor: pointer;
        background: transparent;
        border-radius: 50%;
        outline: none;
    }

    .title {
        font-size: medium;
        text-transform: uppercase;
    }
}

dialog:not([data-active="true"]) {
    opacity: 0.9;
    border-color: var(--border);
    box-shadow: none;

    header {
        border-bottom: solid 1px var(--border);
        color: var(--border);
    }

    .close {
        color: var(--border);
    }
}

dialog iframe {
    flex: 1;
    border: none;
}

nav {
    ul {
        list-style: none;
        display: flex;
        flex-wrap: wrap;
        gap: var(--padd);
        padding: var(--padd);

        li:has(> a) {
            cursor: pointer;
        }

        li:has(> a):hover {
            background: var(--border);

            a {
                color: white;
            }
        }

        li:not(:has(> a)) {
            padding: var(--padd);
        }

        li {
            display: inline-block;
            border: 1px solid var(--border);
            text-transform: uppercase;
            color: var(--border);

            a {
                display: block;
                padding: var(--padd);
                color: var(--text);
            }
        }

        li.active {
            background: var(--border);

            a {
                color: white;
            }
        }
    }
}

p a {
    text-decoration: dotted underline;
}

.detail {
    /* mobile-first: stacked */
    display: block;
}

.detail iframe {
    width: 100%;
    height: 400px;
    border: 1px solid var(--border);
    display: block;
}

.detail p {
    margin-top: 1rem;
}

@media (min-width: 600px) {
    .detail {
        display: flex;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .detail iframe {
        width: 400px;
        height: 500px;
        flex-shrink: 0;
    }

    .detail p {
        margin-top: 0;
    }
}

.detail div {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}