@import url('https://cdn.jsdelivr.net/gh/vsalvino/computer-modern@main/fonts/sans.css');
@import url('https://cdn.jsdelivr.net/gh/vsalvino/computer-modern@main/fonts/serif.css');
@import url('https://cdn.jsdelivr.net/gh/vsalvino/computer-modern@main/fonts/bright.css');

@import url('./styles/chevron-left.css');
@import url('./styles/chevron-right.css');
@import url('./styles/calendar.css');

*,
*::before,
*::after {
    font-family: inherit;
    color: inherit;

    margin: 0;
    padding: 0;

    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

img {
    display: block;
}

button,
.button {
    cursor: pointer;
}

a {
    text-decoration: none;
    color: #a00;

    padding: 0.125rem 2px;
    border-radius: 4px;

    &:hover {
        background-color: #a00;
        color: #fff;
    }

    @media screen and (max-width: 50rem) {
        padding: 0.125rem 1px;
    }
}

h1,
h2,
h3,
h4 {
    font-weight: 400;
    font-family: 'Computer Modern Bright', sans-serif;
}

h1 {
    font-weight: bold;
    color: #581111;
}

table {
    margin: 0 auto;

    width: 30rem;
    max-width: 100%;
    border-collapse: collapse;

    th,
    td {
        border: 1px solid #333;
        padding: 0.25rem;
        min-width: 6rem;
    }

    th {
        font-weight: bold;
    }

    @media screen and (max-width: 50rem) {
        width: 100%;
        max-width: auto;

        font-size: 14px;
        line-height: 1.25;

        th,
        td {
            min-width: auto;
        }
    }
}

code {
    font-family: monospace;
    font-size: 0.9em;
    border-radius: 4px;
}

/* Components */

.tutor-entries {
    display: grid;

    gap: 1rem;
}

.tutor {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas:
        'avatar name'
        'avatar contacts';

    column-gap: 2rem;

    hyphens: none;
    word-break: break-all;

    > .name {
        grid-area: name;
        font-size: 1.5rem;
        padding-top: 0.5rem;
    }

    > .image {
        grid-area: avatar;
        width: 8rem;
        height: 8rem;

        border: 2px solid #a00;
        border-radius: 50%;

        object-fit: cover;
    }

    > .contacts {
        grid-area: contacts;

        padding-left: 1rem;

        > li {
            margin: 0;
        }
    }

    @media screen and (max-width: 50rem) {
        column-gap: 1rem;

        > .name {
            font-size: 1.25rem;
            padding-top: 0;
        }

        > .image {
            width: 5rem;
            height: 5rem;
        }

        > .contacts {
            font-size: 16px;
        }
    }
}

/* Layout */

body {
    font-family: 'Computer Modern Serif', sans-serif;
    text-rendering: optimizeLegibility;

    font-size: 20px;

    line-height: 1;
    color: #333;
    background-color: #f3f0f0;

    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;

    gap: 6rem;
    padding-bottom: 6rem;

    header {
        user-select: none;

        width: 100%;

        background-color: #a00;
        color: #fff;

        display: grid;
        grid-template-rows: auto auto;

        place-items: center;

        gap: 2rem;

        padding: 6rem 1rem 1.25rem;

        box-shadow: 0 0 2rem rgba(0, 0, 0, 0.125);

        > h1 {
            line-height: 1.125;
            font-family: 'Computer Modern Serif', sans-serif;
            text-align: center;
        }

        nav {
            display: flex;
            justify-content: space-between;

            width: 100%;
            max-width: 64rem;

            .row {
                display: grid;
                grid-auto-flow: column;
                gap: 1rem;
            }

            > .course-navigation {
                display: flex;
                flex-wrap: wrap;
                gap: 1rem;

                > .last {
                    order: 1;
                }
            }
        }

        a {
            display: grid;
            place-content: center;

            color: #fff;

            padding: 0.5rem;

            &:hover {
                background-color: #fff;
                color: #a00;
            }

            font-weight: bold;
            font-size: 22px;

            border-radius: 2px;

            &.disabled {
                pointer-events: none;
                color: #420000;
            }
        }

        h1 > a {
            font-size: 42px;
        }

        @media screen and (max-width: 64rem) {
            gap: 0;
            padding: 1rem;

            nav {
                flex-direction: column;
                align-items: center;
                gap: 1rem;

                > .course-navigation {
                    justify-content: center;
                }

                a {
                    font-size: 20px;
                    padding: 0.25rem;
                }
            }
        }
    }

    main {
        width: 50rem;
        max-width: 100%;

        background-color: #fff;
        border: 4px solid #a00;
        border-radius: 2px;

        padding: 2rem;

        place-self: center;

        box-shadow: 0 0 2rem rgba(0, 0, 0, 0.1);

        /* text-align: justify; */
        hyphens: auto;

        line-height: 1.65;

        > * + * {
            margin-top: 1rem;
        }

        hr {
            border: none;
            border-top: 2px solid #a00;
            margin: 2rem auto;
        }

        ul,
        ol {
            padding-left: 2rem;

            li {
                margin-bottom: 1rem;
            }

            li + li {
                margin-top: 1rem;
            }
        }

        ul {
            list-style-type: disc;
        }

        .katex {
            font-size: 1em;
        }
    }

    footer {
        place-self: center;

        a:has(img) {
            display: inline-block;
            background: none;

            padding: 0;

            border: 2px solid transparent;

            &:hover {
                background: none;
                border: 2px solid #a00;
            }
        }

        img {
            display: inline-block;
            max-height: 3rem;
            vertical-align: middle;
        }

        .logo {
            transform: translate(0, -0.25rem);
        }
    }
}

/* Mobile */

@media screen and (max-width: 50rem) {
    body {
        gap: 0;
        padding-bottom: 3rem;

        font-size: 18px;

        > main {
            width: 100%;
            padding: 2rem 1rem 1rem 1rem;

            border: none;
            border-bottom: 4px solid #a00;
            border-radius: 0;
        }

        > footer {
            margin-top: 3rem;
        }
    }
}