/* Shiny Button Css */

:root {
    --shiny-cta-bg: #000000;
    --shiny-cta-bg-subtle: #1a1818;
    --shiny-cta-fg: #ffffff;
    --shiny-cta-highlight: blue;
    --shiny-cta-highlight-subtle: #8484ff;
}

@property --gradient-angle {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}

@property --gradient-angle-offset {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}

@property --gradient-percent {
    syntax: "<percentage>";
    initial-value: 5%;
    inherits: false;
}

@property --gradient-shine {
    syntax: "<color>";
    initial-value: white;
    inherits: false;
}

.shiny-cta {
    --animation: gradient-angle linear infinite;
    --duration: 3s;
    --shadow-size: 2px;
    isolation: isolate;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    outline-offset: 4px;
    padding: 1.25rem 2.5rem;
    font-size: 22px;
    font-family: Poppins, sans-serif;
    font-weight: 600;
    font-style: normal;
    line-height: 1.2;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: 360px;
    color: var(--shiny-cta-fg);
    background: linear-gradient(var(--shiny-cta-bg), var(--shiny-cta-bg)) padding-box,
        conic-gradient(from calc(var(--gradient-angle) - var(--gradient-angle-offset)),
            transparent,
            var(--shiny-cta-highlight) var(--gradient-percent),
            var(--gradient-shine) calc(var(--gradient-percent) * 2),
            var(--shiny-cta-highlight) calc(var(--gradient-percent) * 3),
            transparent calc(var(--gradient-percent) * 4)) border-box;
    box-shadow: inset 0 0 0 1px var(--shiny-cta-bg-subtle);
    margin-top: 20px;

    &::before,
    &::after,
    span::before {
        content: "";
        pointer-events: none;
        position: absolute;
        inset-inline-start: 50%;
        inset-block-start: 50%;
        translate: -50% -50%;
        z-index: -1;
    }

    &:active {
        translate: 0 1px;
    }
}

/* Dots pattern */
.shiny-cta::before {
    --size: calc(100% - var(--shadow-size) * 3);
    --position: 2px;
    --space: calc(var(--position) * 2);
    width: var(--size);
    height: var(--size);
    background: radial-gradient(circle at var(--position) var(--position),
            white calc(var(--position) / 4),
            transparent 0) padding-box;
    background-size: var(--space) var(--space);
    background-repeat: space;
    mask-image: conic-gradient(from calc(var(--gradient-angle) + 45deg),
            black,
            transparent 10% 90%,
            black);
    border-radius: inherit;
    opacity: 0.4;
    z-index: -1;
}

/* Inner shimmer */
.shiny-cta::after {
    --animation: shimmer linear infinite;
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(-50deg,
            transparent,
            var(--shiny-cta-highlight),
            transparent);
    mask-image: radial-gradient(circle at bottom, transparent 40%, black);
    opacity: 0.6;
}

.shiny-cta span {
    z-index: 1;

    &::before {
        --size: calc(100% + 1rem);
        width: var(--size);
        height: var(--size);
        box-shadow: inset 0 -1ex 2rem 4px var(--shiny-cta-highlight);
        opacity: 0;
    }
}

/* Animate */
.shiny-cta {
    --transition: 800ms cubic-bezier(0.25, 1, 0.5, 1);
    transition: var(--transition);
    transition-property: --gradient-angle-offset, --gradient-percent,
        --gradient-shine;

    &,
    &::before,
    &::after {
        animation: var(--animation) var(--duration),
            var(--animation) calc(var(--duration) / 0.4) reverse paused;
        animation-composition: add;
    }

    span::before {
        transition: opacity var(--transition);
        animation: calc(var(--duration) * 1.5) breathe linear infinite;
    }
}

.shiny-cta:is(:hover, :focus-visible) {
    --gradient-percent: 20%;
    --gradient-angle-offset: 95deg;
    --gradient-shine: var(--shiny-cta-highlight-subtle);

    &,
    &::before,
    &::after {
        animation-play-state: running;
    }

    span::before {
        opacity: 1;
    }
}

@keyframes gradient-angle {
    to {
        --gradient-angle: 360deg;
    }
}

@keyframes shimmer {
    to {
        rotate: 360deg;
    }
}

@keyframes breathe {

    from,
    to {
        scale: 1;
    }

    50% {
        scale: 1.2;
    }
}