@layer base, components, utilities;

@layer base {
    *,
    *::before,
    *::after {
        font-family: inherit;
        margin: 0;
        box-sizing: border-box;
    }

    html {
        height: 100%;
    }

    html,
    body {
        min-height: 100%;

        @media (width < 70rem) {
            overflow-x: hidden;
        }
    }

    img {
        display: block;
    }

    h1,
    h2,
    h3,
    h4 {
        font-weight: 600;
        margin: 0;
        color: #444;
        line-height: 1.25;
    }

    a {
        color: royalblue;
        text-decoration: underline dotted;

        &:hover {
            text-decoration: underline;
        }
    }

    textarea,
    input[type='text'] {
        font-size: 16px;

        background: #fff;
        border: 1px solid #888;
        min-height: 1.75rem;
        padding: 0 0.25rem;
        border-radius: 0.25rem;

        box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.1);
    }

    textarea {
        resize: vertical;

        padding: 0.5rem;

        font-family: 'JetBrains Mono', monospace;
        font-weight: 400;
        color: #333;
    }

    button,
    select {
        font-family: 'Open Sans', sans-serif;
        font-size: 16px;
        font-weight: 400;
        color: #333;

        box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.1);
        background: #f0f0f0;
        border: 1px solid #888;
        padding: 0 0.5rem;
        border-radius: 0.25rem;
        min-height: 1.75rem;

        cursor: pointer;

        &:hover {
            background: #e0e0e0;
        }
    }

    p {
        line-height: 1.75;
    }

    pre,
    code {
        font-family: 'JetBrains Mono', monospace;
        font-weight: 400;
        color: #333;
    }

    strong {
        font-weight: 700;
        color: #444;
    }

    small {
        font-size: 0.5em;
        font-weight: 400;
    }
}

@layer components {
    body {
        font-family: 'Open Sans', sans-serif;
        font-size: 16px;
        line-height: 1.75;

        color: #333;

        padding: 6rem 1rem;

        > * {
            display: block;
            width: 900px;
            max-width: 100%;
            margin: 1rem auto;
        }
    }

    canvas {
        display: grid;
        width: 100%;
        aspect-ratio: 1 / 1;

        border: 1px solid #ddd;
        box-shadow: 0 0 1rem rgba(0, 0, 0, 0.1);

        border-radius: 1rem;
    }

    .steps {
        display: grid;
        grid-auto-flow: row;
        justify-items: center;
        grid-template-columns: 1fr auto;

        border: 1px solid #ddd;
        box-shadow: 0 0 1rem rgba(0, 0, 0, 0.1);

        border-radius: 1rem;

        padding: 2rem;
        margin: 2rem auto;

        width: 100%;
        max-width: fit-content;

        > .title {
            grid-column: span 2;
            text-align: center;
            padding-bottom: 1rem;

            @media (width < 70rem) {
                grid-column: span 1;
            }
        }

        > .step {
            grid-column: span 2;

            display: grid;
            grid-template-columns: subgrid;

            justify-items: center;
            /* align-items: center; */
            gap: 0;

            @media (width < 70rem) {
                grid-column: span 1;
                grid-template-columns: 1fr;
            }

            > .algebraic-step {
                justify-self: stretch;

                /* border: 1px solid #ddd; */
                /* box-shadow: 0 0 1rem rgba(0, 0, 0, 0.1); */

                border-radius: 1rem;
                padding: 0 1rem;

                > * {
                    max-width: 100%;
                }

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

            > .geometric-step {
                display: grid;

                canvas {
                    width: 25rem;
                    height: 25rem;

                    @media (width < 70rem) {
                        width: calc(100vw - 4rem);
                        height: calc(100vw - 4rem);

                        max-width: 25rem;
                        max-height: 25rem;
                    }
                }

                @media (width < 70rem) {
                    padding: 0 1rem;
                }
            }

            > * {
                min-width: 25rem;
            }

            padding: 2rem 0;

            &:not(:nth-child(1), :nth-child(2)) {
                border-top: 1px solid #ddd;
            }

            @media (width < 70rem) {
                max-width: 100%;
                gap: 1rem;
                padding: 1rem 0;

                > * {
                    min-width: 0;
                }
            }
        }

        @media (width < 70rem) {
            grid-template-columns: 1fr;
            padding: 1rem 0 0 0;
            max-width: 100%;
        }
    }
}

@layer utilities {
    .v-stack {
        display: grid;
        gap: 0.5rem;
        align-content: start;
        justify-items: start;
    }

    .h-stack {
        display: grid;
        gap: 0.5rem;
        grid-auto-flow: column;
        align-items: center;
    }

    .scrollable {
        display: grid;

        > .scroll-content {
            display: grid;
        }

        @media (width < 70rem) {
            position: relative;

            > .scroll-content {
                overflow-x: auto;
                padding: 1rem;
            }

            &::after {
                content: '';
                position: absolute;
                top: 0;
                right: 0;
                bottom: 0;
                width: 0.5rem;
                background: linear-gradient(to left, #0003, #0000);
                border-radius: 0.25rem;
            }
        }
    }

    .flex-row {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 0.5rem;

        > .spacer {
            flex-grow: 1;
        }

        @media (width < 70rem) {
            flex-wrap: wrap;
        }
    }

    .text-center {
        text-align: center;
    }
}

.katex-display {
    margin: 0 !important;
}