Flexbox button with 3 styles and variations

The button, styled using CSS Flexbox, includes primary, secondary, and tertiary styles, all structured within nested CSS for clarity and maintainability, with variations such as:

with text
with text and icon (left / right / left & right)
with only icon
with status
for full-width
for disabled type

HTML code:

<a href="#" class="sf-button is-primary">Link</a>
<input class="sf-button is-primary" type="submit" value="Submit">
<button class="sf-button is-primary">Button</button>

<h4>Primary</h4>

<a href="#" class="sf-button is-primary">Button text</a>
<a href="#" class="sf-button is-primary"><i class="fa-regular fa-file"></i>Button text</a>
<a href="#" class="sf-button is-primary">Button text<i class="fa-solid fa-angle-right"></i></a>
<a href="#" class="sf-button is-primary"><i class="fa-solid fa-grip"></i>Button text<i class="fa-solid fa-arrow-right"></i></a>
<a href="#" class="sf-button is-primary has-only-icon"><i class="fa-solid fa-grip"></i></a>

<h4>Secondary</h4>

<a href="#" class="sf-button is-secondary">Button text</a>
<a href="#" class="sf-button is-secondary"><i class="fa-regular fa-file"></i>Button text</a>
<a href="#" class="sf-button is-secondary">Button text<i class="fa-solid fa-angle-right"></i></a>
<a href="#" class="sf-button is-secondary"><i class="fa-solid fa-grip"></i>Button text<i class="fa-solid fa-arrow-right"></i></a>
<a href="#" class="sf-button is-secondary has-only-icon"><i class="fa-solid fa-grip"></i></a>

<h4>Tertiary</h4>

<a href="#" class="sf-button is-tertiary">Button text</a>
<a href="#" class="sf-button is-tertiary"><i class="fa-regular fa-file"></i>Button text</a>
<a href="#" class="sf-button is-tertiary">Button text<i class="fa-solid fa-angle-right"></i></a>
<a href="#" class="sf-button is-tertiary"><i class="fa-solid fa-grip"></i>Button text<i class="fa-solid fa-arrow-right"></i></a>
<a href="#" class="sf-button is-tertiary has-only-icon"><i class="fa-solid fa-grip"></i></a>

<h3>Width modifier</h3>
<a href="#" class="sf-button is-fit is-primary"><i class="fa-solid fa-grip"></i>Categories</a>
<a href="#" class="sf-button is-fit is-secondary"><i class="fa-solid fa-grip"></i>Categories</a>
<a href="#" class="sf-button is-fit is-tertiary"><i class="fa-solid fa-grip"></i>Categories</a>

<h3>Disabled</h3>
<a href="#" class="sf-button is-primary disabled"><i class="fa-solid fa-grip"></i>Button text</a>
<a href="#" class="sf-button is-secondary disabled"><i class="fa-solid fa-grip"></i>Button text</a>
<a href="#" class="sf-button is-tertiary disabled"><i class="fa-solid fa-grip"></i>Button text</a>

<h3>Status</h3>
<a href="#" class="sf-button is-primary has-only-icon has-status"><i class="fa-solid fa-gear"></i></a>
<a href="#" class="sf-button is-secondary has-only-icon has-status"><i class="fa-solid fa-grip"></i></a>
<a href="#" class="sf-button is-tertiary has-only-icon has-status"><i class="fa-solid fa-grip"></i></a>

CSS code:

/* ---------------------------------------------------------- */
/*                     Snippflow Button                       */
/* ---------------------------------------------------------- */

.sf-button {
    --sf-button-gap: 8px;
    --sf-button-padding-top: 12px;
    --sf-button-padding-bottom: 12px;
    --sf-button-padding-left: 16px;
    --sf-button-padding-right: 16px;
    --sf-button-border-radius: 8px;
    --sf-button-box-shadow: 0px 1px 2px 0px rgba(16, 24, 40, 0.05);

    --sf-button-primary-color: #fff;
    --sf-button-primary-bg: #46a787;
    --sf-button-primary-border: #3f9b7d;
    --sf-button-primary-hover-color: #fff;
    --sf-button-primary-hover-bg: #3c9376;
    --sf-button-primary-hover-border: #378c70;

    --sf-button-secondary-color: #121924;
    --sf-button-secondary-bg: #F8F8F9;
    --sf-button-secondary-border: #cbd5e1;
    --sf-button-secondary-hover-color: #121924;
    --sf-button-secondary-hover-bg: #fff;
    --sf-button-secondary-hover-border: #cbd5e1;

    --sf-button-tertiary-color: #121924;
    --sf-button-tertiary-bg: transparent;
    --sf-button-tertiary-border: transparent;
    --sf-button-tertiary-hover-color: #121924;
    --sf-button-tertiary-hover-bg: #e0e5ea;
    --sf-button-tertiary-hover-border: transparent;

    --sf-button-tertiary-status: #c82020;
}

a.sf-button,
input[type="submit"].sf-button,
input[type="reset"].sf-button,
input[type="button"].sf-button,
button.sf-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sf-button-gap);
    position: relative;
    box-sizing: border-box;
    font-size: inherit;
    font-weight: 500;
    line-height: 1;
    padding: var(--sf-button-padding-top) var(--sf-button-padding-right) var(--sf-button-padding-bottom) var(--sf-button-padding-left);
    border: 1px solid;
    border-radius: var(--sf-button-border-radius);
    white-space: nowrap;
    outline: unset;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease-in-out;

    &[aria-expanded="true"],
    &:hover {
        text-decoration: none;
    }

    /* Is fit  (100%)*/
    &.is-fit {
        width: 100%;
    }

    /* + Is fit margin */
    & + .is-fit {
        margin-top: 10px; /* btn under other is-fit btm */
    }

    /* Has status */
    &.has-status {
        :after {
            content: "";
            display: block;
            width: 8px;
            height: 8px;
            border-radius: 100%;
            background-color: var(--sf-button-tertiary-status);
            position: absolute;
            right: 5px;
            top: 5px;
            animation: sp-status-pulse 1s infinite ease-in-out alternate;
        }
    }

    /* Is disabled */
    &.disabled,
    &:disabled,
    &[aria-disabled="true"] {
        cursor: default;
        filter: saturate(0%);
        opacity: .7;
        background: transparent;
        transform: none;
        box-shadow: none;
        outline: none;

        &:hover {
            color: initial;
            pointer-events: none;
        }
    }

    /*  Icon */
     & > i {
        min-width: 18px;
        font-style: normal;
        text-align: center;
    }

    /* Has only icon */
    &.has-only-icon {
        padding: var(--sf-button-padding-top);
    }

    /* Primary button */
    &.is-primary {
        color: var(--sf-button-primary-color);
        background-color: var(--sf-button-primary-bg);
        border-color: var(--sf-button-primary-border);
        box-shadow: var(--sf-button-box-shadow);

        &:hover:not(:disabled) {
            color: var(--sf-button-primary-color);
            background-color: var(--sf-button-primary-hover-bg);
            border-color: var(--sf-button-primary-hover-border);
        }
    }

    /* Secondary button */
    &.is-secondary {
        color: var(--sf-button-secondary-color);
        background-color: var(--sf-button-secondary-bg);
        border-color: var(--sf-button-secondary-border);
        box-shadow: var(--sf-button-box-shadow);

        &:hover:not(:disabled) {
            color: var(--sf-button-secondary-color);
            background-color: var(--sf-button-secondary-hover-bg);
            border-color: var(--sf-button-secondary-hover-border);
        }
    }

    /* Tertiary button */
    &.is-tertiary {
        color: var(--sf-button-tertiary-color);
        background-color: var(--sf-button-tertiary-bg);
        border-color: var(--sf-button-tertiary-border);

        &:hover:not(:disabled) {
            color: var(--sf-button-tertiary-color);
            background-color: var(--sf-button-tertiary-hover-bg);
            border-color: var(--sf-button-tertiary-hover-border);
        }
    }

}

@keyframes sp-status-pulse {
    from { transform: scale(0.8); }
    to { transform: scale(1.1); }
}

See the following Codepen for a demo:

PS. I hope it will be useful ;)

Full article: https://snippflow.com/snippet/flexbox-button-with-3-styles-and-variations/
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Flexbox button with 3 styles and variations

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