@layer reset, universal, components, utility;

:root {
    --fs-min: 0.875rem;
    --fs-max: 1.2rem;

    --ff-primary:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans,
        Ubuntu, Cantarell, Helvetica, "Helvetica Neue", Arial, sans-serif,
        "Apple Color Emoji", "Segoe UI Emoji";

    --border-radius: 3px;

    --clr-black-100: hsl(0, 0%, 80%);
    --clr-black-200: hsl(0, 0%, 60%);
    --clr-black-400: hsl(0, 0%, 5%);

    --clr-white-400: hsl(0, 0%, 100%);

    --clr-background-400: hsl(0, 0%, 100%);

    --clr-link-400: LinkText;
    --clr-visited-400: VisitedText;
    --clr-active-400: ActiveText;

    --clr-accent-100: hsl(170, 45%, 97%);
    --clr-accent-400: hsl(170, 45%, 30%);

    --clr-hint-400: hsl(0, 0%, 30%);

    --clr-focus-400: hsl(59, 100%, 95%);

    --clr-disabled-400: hsl(0, 0%, 93%);

    --clr-invalid-100: hsl(0, 100%, 95%);
    --clr-invalid-400: hsl(0, 100%, 50%);

    --clr-info-100: hsl(207, 100%, 95%);
    --clr-info-400: hsl(207, 100%, 50%);

    --clr-warning-100: hsl(45, 100%, 95%);
    --clr-warning-400: hsl(40, 100%, 50%);

    --clr-danger-100: hsl(0, 45%, 95%);
    --clr-danger-400: hsl(0, 45%, 54%);

    --clr-error-100: hsl(0, 100%, 95%);
    --clr-error-400: hsl(0, 100%, 50%);

    --clr-highlight-100: hsl(43, 100%, 90%);
    --clr-highlight-400: hsl(43, 100%, 85%);

    --clr-btn-loading-spinner: var(--clr-accent-100);

    --icon-external-link: url('data:image/svg+xml,\
		<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"> \
			<g style="stroke: rgb(35, 82, 124); stroke-width: 1"> \
				<line x1="5" y1="5" x2="5" y2="14" /> \
				<line x1="14" y1="9" x2="14" y2="14" /> \
				<line x1="5" y1="14" x2="14" y2="14" /> \
				<line x1="5" y1="5" x2="9" y2="5" /> \
				<line x1="10" y1="2" x2="17" y2="2"  /> \
				<line x1="17" y1="2" x2="17" y2="9" /> \
				<line x1="10" y1="9" x2="17" y2="2" style="stroke-width: 1.5" /> \
			</g> \
		</svg>');
}

@layer reset {
    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

    html:focus-within {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        line-height: 1.3;
        text-rendering: optimizeSpeed;
    }

    img,
    picture {
        display: block;
        max-inline-size: 100%;
    }

    button,
    input,
    select,
    textarea {
        font: inherit;
    }
}

@layer universal {
    html {
        font-family: var(--ff-primary);
        font-size: var(--fs-min);
    }

    body {
        background: var(--clr-background-400);
        color: var(--clr-black-400);
        padding-inline: 1rem;
    }

    h1 {
        font-size: 1.7rem;
    }

    a {
        color: var(--clr-link-400);
    }

    a:visited {
        color: var(--clr-visited-400);
    }

    a:active {
        color: var(--clr-active-400);
    }

    hr {
        inline-size: 100%;
        border: none;
        border-block-start: 1px solid var(--clr-black-200);
    }

    details {
        margin-block: 0.5rem;
    }

    summary {
        cursor: pointer;
    }

    table {
        border-spacing: 0;
    }

    thead,
    th {
        position: sticky;
        top: 0;
        background: var(--clr-background-400);
        text-align: left;
        vertical-align: bottom;
        z-index: 1;
    }

    td {
        vertical-align: top;
    }

    th,
    td {
        padding: 0.5rem 1rem;
    }

    button,
    input:not([type="checkbox"]),
    select {
        min-height: 1.5rem;
    }

    textarea {
        resize: vertical;
        max-height: 500px;
    }

    iframe {
        max-width: 100%;
    }

    input,
    textarea,
    select {
        background: var(--clr-white-400);
        border: 1px solid var(--clr-black-200);
        transition: background 300ms;
        max-width: 100%;
    }

    button,
    input,
    textarea,
    select {
        padding-block: 0.4rem;
        padding-inline: 0.6rem;
        border-radius: var(--border-radius);
    }

    button {
        border: none;
    }

    :is(button, input, textarea, select):focus {
        outline: 2px solid var(--clr-link-400);
    }

    :is(input, textarea, select).invalid:placeholder-shown,
    :is(input, textarea, select).invalid:not(:placeholder-shown),
    :is(
            input:not([type="time"], [type="date"], [type="file"]),
            textarea
        ):invalid:not(:placeholder-shown),
    [data-invalid] :is(input, textarea, select):invalid {
        background: var(--clr-invalid-100);
        border-color: var(--clr-invalid-400);
    }

    :is(input, textarea, select).invalid:focus,
    :is(input, textarea, select):invalid:focus,
    :is(
            input:not([type="time"], [type="date"], [type="file"]),
            textarea
        ):invalid:focus {
        background: var(--clr-focus-400);
    }

    :is(input, textarea):placeholder-shown {
        background: var(--clr-white-400);
    }

    [disabled] :is(input, textarea, select),
    input[disabled],
    textarea[disabled],
    select[disabled] {
        background: var(--clr-disabled-400);
    }

    label.required::after {
        content: "*";
        color: var(--clr-invalid-400);
        margin-inline-start: 0.2em;
    }

    .form,
    form,
    fieldset {
        display: flex;
        flex-direction: column;
        gap: 0.4rem;
    }

    :is(.form, form, fieldset) + :is(.form, form, fieldset) {
        margin-top: 0.8rem;
    }

    fieldset {
        padding: 0;
        border: none;
    }

    .form > p,
    form > p,
    fieldset > p {
        margin-block: 0.4rem;
    }

    legend {
        font-size: 1.3rem;
        font-weight: bold;
        padding: 0;
        padding-block-end: 0.5rem;
    }

    :is(form, .form) input:not([type="checkbox"]),
    :is(form, .form) textarea,
    :is(form, .form) button {
        display: block;
    }

    label small {
        color: var(--clr-hint-400);
    }

    label small::before {
        content: "(";
    }

    label small::after {
        content: ")";
    }

    a[href^="//"]::after,
    a[href^="http://"]::after,
    a[href^="https://"]::after {
        content: "";
        background-image: var(--icon-external-link);
        background-repeat: no-repeat;
        padding-right: 1rem;
    }
}

@layer components {
    .bag {
        display: flex;
        flex-wrap: wrap;
        flex-direction: row;
        align-items: center;
        gap: 0.5rem;
    }

    .bag.reverse {
        flex-direction: row-reverse;
    }

    .stack {
        display: flex;
        flex-direction: column;
    }

    .stack.reverse {
        flex-direction: column-reverse;
    }

    .warning-box {
        padding-inline: 1rem;
        background: var(--clr-warning-100);
        border: 1px solid var(--clr-warning-400);
        border-radius: var(--border-radius);
    }

    .flash-banner,
    .error-banner,
    .warning-banner {
        margin-block: 1rem;
        padding: 0 1rem;
        border-radius: var(--border-radius);
    }

    .flash-banner {
        background: hsl(207, 97, 7);
        border: 1px solid var(--clr-info-400);
        text-align: center;
    }

    .flash-banner--warning {
        background: var(--clr-warning-100);
        border-color: var(--clr-warning-400);
    }

    .flash-banner--important {
        background: var(--clr-danger-100);
        border-color: var(--clr-danger-400);
    }

    .warning-banner {
        background: var(--clr-warning-100);
        border: 1px solid var(--clr-warning-400);
    }

    .error-text {
        color: var(--clr-error-400);
    }

    .error {
        color: var(--clr-error-400);
        margin-block: 0;
    }

    .error:empty {
        display: none;
    }

    .error-banner::first-letter,
    .error-banner *::first-letter,
    .error-text::first-letter,
    .error-text *::first-letter,
    .error::first-letter,
    .error *::first-letter {
        text-transform: capitalize;
    }

    .error-banner {
        background: var(--clr-error-100);
        border: 1px solid var(--clr-error-400);
        color: var(--clr-black-400);
        text-align: center;
    }

    button,
    .btn {
        display: inline-flex;
        padding-block: 0.4rem;
        padding-inline: 1rem;
        background: var(--clr-accent-400);
        color: var(--clr-white-400);
        text-decoration: none;
        cursor: default;
        border-radius: var(--border-radius);
        gap: 0.5rem;
        align-items: center;
        justify-content: center;
    }

    :is(button, .btn):not(
            [disabled],
            [aria-disabled],
            [data-disable="loading"]
        ):hover,
    :is(button, .btn):not(
            [disabled],
            [aria-disabled],
            [data-disable="loading"]
        ):focus {
        filter: brightness(1.2);
    }

    :is(button, .btn):is(
        [disabled],
        [aria-disabled],
        [data-disable="loading"]
    ) {
        cursor: not-allowed;
        filter: saturate(0.5);
        opacity: 0.6;
    }

    :is(button, .btn):is(
            [disabled],
            [aria-disabled],
            [data-disable="loading"]
        ):active {
        pointer-events: none;
    }

    .btn--alt {
        background: var(--clr-white-400);
        color: var(--clr-accent-400);
        outline: 1px solid var(--clr-accent-400);
    }

    .btn--danger {
        background: var(--clr-danger-400);
    }

    .btn--large {
        padding-block: 0.7rem;
        padding-inline: 3rem;
    }

    .btn--link {
        display: inline;
        padding: 0;
        background: transparent;
        color: var(--clr-link-400);
        cursor: pointer;
        text-decoration: underline;
    }

    .btn--link.btn--danger {
        color: var(--clr-danger-400);
    }

    .btn--loading.btn--alt {
        --clr-btn-loading-spinner: var(--clr-accent-800);
    }

    .btn--loading::before {
        content: "";
        display: block;
        width: 0.9rem;
        height: 0.9rem;
        border-radius: 50%;
        border: 2px solid transparent;
        transition: border-color 300ms;
        animation: btn-loading-spinner 1.2s ease-in-out infinite;
    }

    .btn--loading::before {
        border-color: var(--clr-btn-loading-spinner) transparent
            var(--clr-btn-loading-spinner) transparent;
    }

    @keyframes btn-loading-spinner {
        0% {
            transform: rotate(0deg);
        }
        100% {
            transform: rotate(360deg);
        }
    }

    .sign-in-alt {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

    .sign-in-alt__title {
        display: flex;
        flex-direction: row;
        width: 100%;
        gap: 1rem;
        font-weight: bold;
        text-transform: uppercase;
        color: var(--clr-black-100);
        margin-block-end: 0.5rem;
    }

    .sign-in-alt__title::before,
    .sign-in-alt__title::after {
        content: "";
        flex: 1 1;
        border-bottom: 1px solid var(--clr-black-100);
        margin: auto;
    }

    .g_id_signin {
        display: inline-block;
    }
}

@layer utility {
    .inline-block {
        display: inline-block;
    }

    .inline-flex {
        display: inline-flex;
    }

    .text-italic {
        font-style: italic;
    }

    .text-bold {
        font-weight: bold;
    }

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

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

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

    .no-wrap {
        white-space: nowrap;
    }

    .push-inline-end {
        margin-inline-start: auto;
    }

    .grow {
        flex-grow: 1;
    }

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