livewire-material/resources/views/mail/theme.blade.php

{{-- The Markdown mail theme, as CSS rendered from the application's colour scheme.

     Select it with `mail.markdown.theme` = `livewire-material::mail.theme` (MAIL_MARKDOWN_THEME),
     or `$theme` / `->theme()` on one mailable or MailMessage. Laravel renders a namespaced theme
     as a view (Illuminate\Mail\Markdown::render) and hands the result to CssToInlineStyles, which
     writes it onto every element's `style` — so the colours are the app's light scheme, read
     from `livewire-material.scheme` (Support\Scheme, falling back to the package's default), and
     a regenerated scheme reaches the next mail without a copy to keep in step.

     What a mail client can take, and so what this is:
     - Hexes only. No custom properties, no `color-mix()`, no alpha: a client resolves none of
       them, and Outlook drops an alpha channel.
     - Light only. `Css\Processor::doCleanup()` strips every `@media` block from the theme before
       inlining, so a `prefers-color-scheme` rule here would be deleted silently; it could only
       live in a `<style>` in a published layout, and the framework layout declares
       `color-scheme: light` in two meta tags besides. Clients that force dark invert the light
       tones, which are mid-tone enough to survive it.
     - M3's typescale on the bare tags CommonMark writes (`h1` headline-sm, `p` body-lg, a table
       head title-sm), in px, with a system font stack: web fonts and
       `font-variation-settings` reach too few clients to be worth an asset.
     - No elevation. The card separates from the page by tone, as M3 surfaces do.
     - The button is M3's filled button at the `md` size (56px, title-md label, full corners),
       written as borders because padding on an `<a>` is not honoured everywhere. Outlook
       Classic squares the corners; it is still a button. `x-mail::button`'s `color` takes any
       role with a filled pair — primary, secondary, tertiary, error, success, warning, info —
       and the framework's blue, green and red. --}}

@php
    $role = \NoNameWeb\LivewireMaterial\Support\Scheme::light();

    $page = $role['surface-container'];
    $card = $role['surface-container-lowest'];
    $tint = $role['surface-container'];

    $buttons = [
        'primary' => ['primary', 'on-primary'],
        'secondary' => ['secondary', 'on-secondary'],
        'tertiary' => ['tertiary', 'on-tertiary'],
        'error' => ['error', 'on-error'],
        'success' => ['success', 'on-success'],
        'warning' => ['warning', 'on-warning'],
        'info' => ['info', 'on-info'],
        'blue' => ['primary', 'on-primary'],
        'green' => ['success', 'on-success'],
        'red' => ['error', 'on-error'],
    ];
@endphp

/* Base */

body,
body *:not(html):not(style):not(br):not(tr):not(code) {
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, Roboto, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
    position: relative;
}

body {
    -webkit-text-size-adjust: none;
    background-color: {{ $page }};
    color: {{ $role['on-surface-variant'] }};
    height: 100%;
    line-height: 1.5;
    margin: 0;
    padding: 0;
    width: 100% !important;
}

p,
ul,
ol,
blockquote {
    line-height: 1.5;
    text-align: start;
}

a {
    color: {{ $role['primary'] }};
}

a img {
    border: none;
}

/* Typography: M3's typescale */

h1 {
    color: {{ $role['on-surface'] }};
    font-size: 24px;
    font-weight: 400;
    letter-spacing: 0;
    line-height: 32px;
    margin-top: 0;
    text-align: start;
}

h2 {
    color: {{ $role['on-surface'] }};
    font-size: 22px;
    font-weight: 400;
    letter-spacing: 0;
    line-height: 28px;
    margin-top: 0;
    text-align: start;
}

h3 {
    color: {{ $role['on-surface'] }};
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.15px;
    line-height: 24px;
    margin-top: 0;
    text-align: start;
}

p {
    color: {{ $role['on-surface-variant'] }};
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.5px;
    line-height: 24px;
    margin-top: 0;
    text-align: start;
}

ul,
ol {
    color: {{ $role['on-surface-variant'] }};
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.5px;
    line-height: 24px;
    margin: 0 0 16px;
    padding-left: 24px;
}

li {
    margin: 0 0 4px;
}

/* A `->line()` per item makes a loose list, each item wrapped in a paragraph with a
   paragraph's margin; without this it reads as numbered paragraphs, not one list. */

li p {
    margin: 0;
}

/* Bold stays bold: a 500 would fall to 400 in the many system fonts without a medium weight. */

strong {
    color: {{ $role['on-surface'] }};
}

blockquote {
    border-left: 4px solid {{ $role['outline-variant'] }};
    margin: 0 0 16px;
    padding-left: 16px;
}

code {
    background-color: {{ $tint }};
    border-radius: 4px;
    color: {{ $role['on-surface'] }};
    font-size: 14px;
    padding: 2px 4px;
}

hr {
    border: 0;
    border-top: 1px solid {{ $role['outline-variant'] }};
    margin: 24px 0;
}

p.sub {
    font-size: 14px;
    letter-spacing: 0.25px;
    line-height: 20px;
}

img {
    max-width: 100%;
}

/* Layout */

.wrapper {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 100%;
    background-color: {{ $page }};
    margin: 0;
    padding: 0;
    width: 100%;
}

.content {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 100%;
    margin: 0;
    padding: 0;
    width: 100%;
}

/* Header: the app name in title-lg (22/28 at weight 400), or the configured logo */

.header {
    padding: 32px 0 24px;
    text-align: center;
}

.header a {
    color: {{ $role['on-surface'] }};
    font-size: 22px;
    font-weight: 400;
    letter-spacing: 0;
    line-height: 28px;
    text-decoration: none;
}

.logo {
    border: 0;
    display: block;
    height: auto;
    margin: 0 auto;
}

/* Body: the card, separated from the page by tone alone, on M3's extra-large corner */

.body {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 100%;
    background-color: {{ $page }};
    border: 0;
    margin: 0;
    padding: 0;
    width: 100%;
}

.inner-body {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 570px;
    background-color: {{ $card }};
    border: 0;
    border-radius: 28px;
    margin: 0 auto;
    padding: 0;
    width: 570px;
}

/* A long URL breaks where it has to; `break-all`, the framework's value, breaks ordinary words too. */

.inner-body a {
    overflow-wrap: anywhere;
}

.content-cell {
    max-width: 100vw;
    padding: 32px;
}

/* Subcopy */

.subcopy {
    border-top: 1px solid {{ $role['outline-variant'] }};
    margin-top: 24px;
    padding-top: 24px;
}

.subcopy p {
    font-size: 14px;
    letter-spacing: 0.25px;
    line-height: 20px;
}

/* Footer: body-sm */

.footer {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 570px;
    margin: 0 auto;
    padding: 0;
    text-align: center;
    width: 570px;
}

.footer p {
    color: {{ $role['on-surface-variant'] }};
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.4px;
    line-height: 16px;
    text-align: center;
}

.footer a {
    color: {{ $role['on-surface-variant'] }};
    text-decoration: underline;
}

/* Tables: a title-sm head over an outline-variant rule, body-md cells, a rule between rows */

.table table {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 100%;
    border-collapse: collapse;
    margin: 24px auto;
    width: 100%;
}

.table th {
    border-bottom: 1px solid {{ $role['outline-variant'] }};
    color: {{ $role['on-surface-variant'] }};
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.1px;
    line-height: 20px;
    margin: 0;
    padding: 0 12px 12px;
    text-align: start;
}

/* A Markdown table's column alignment arrives as an `align` attribute, which an inline
   `text-align` would override; the head follows it here as the cells do by themselves. */

.table th[align="center"] {
    text-align: center;
}

.table th[align="right"] {
    text-align: right;
}

.table td {
    border-bottom: 1px solid {{ $role['outline-variant'] }};
    color: {{ $role['on-surface'] }};
    font-size: 14px;
    font-weight: 400;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.25px;
    line-height: 20px;
    margin: 0;
    padding: 12px;
}

.table tr:last-child td {
    border-bottom: 0;
}

/* Buttons: M3's filled button, md */

.action {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 100%;
    float: unset;
    margin: 32px auto;
    padding: 0;
    text-align: center;
    width: 100%;
}

.button {
    -webkit-text-size-adjust: none;
    border-radius: 9999px;
    display: inline-block;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.15px;
    line-height: 24px;
    overflow: hidden;
    text-decoration: none;
}

@foreach ($buttons as $name => [$container, $content])
.button-{{ $name }} {
    background-color: {{ $role[$container] }};
    border-bottom: 16px solid {{ $role[$container] }};
    border-left: 24px solid {{ $role[$container] }};
    border-right: 24px solid {{ $role[$container] }};
    border-top: 16px solid {{ $role[$container] }};
    color: {{ $role[$content] }};
}

@endforeach
/* Panel: a tinted container, no rule down its edge */

.panel {
    -premailer-cellpadding: 0;
    -premailer-cellspacing: 0;
    -premailer-width: 100%;
    border-collapse: separate;
    margin: 24px 0;
    width: 100%;
}

.panel-content {
    background-color: {{ $tint }};
    border-radius: 16px;
    color: {{ $role['on-surface'] }};
    padding: 16px 20px;
}

.panel-content p {
    color: {{ $role['on-surface'] }};
}

.panel-item {
    padding: 0;
}

.panel-item p:last-of-type {
    margin-bottom: 0;
    padding-bottom: 0;
}

/* Utilities */

.break-all {
    overflow-wrap: anywhere;
}