/* ==========================================================================
   Buttons. The lime button is the selected vertex of the page: the one thing to press. On hover a
   highlight sweeps across it and its edge lights up like a selection outline.
   ========================================================================== */

.button {
    --button-bg: var(--ink-800);
    --button-fg: var(--text-strong);
    --button-border: var(--line-strong);

    position: relative;
    isolation: isolate;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    min-block-size: 48px;
    padding: 0.8rem 1.35rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--button-border);
    background: var(--button-bg);
    color: var(--button-fg);
    font-family: var(--font-sans);
    font-weight: 800;
    font-size: var(--step-0);
    letter-spacing: -0.005em;
    line-height: 1.1;
    text-decoration: none;
    overflow: hidden;
    cursor: pointer;
    transition:
        transform var(--dur-3) var(--ease-spring),
        box-shadow var(--dur-3) var(--ease-out),
        background var(--dur-2),
        border-color var(--dur-2),
        color var(--dur-2);
    -webkit-tap-highlight-color: transparent;
}

.button svg {
    inline-size: 1.2em;
    block-size: 1.2em;
    flex: none;
}

.button .button__arrow {
    transition: transform var(--dur-3) var(--ease-out);
}

.button:hover .button__arrow {
    transform: translateX(4px);
}

.button:active {
    transform: scale(0.97);
}

.button--lime {
    --button-bg: var(--lime-500);
    --button-fg: #0d1402;
    --button-border: transparent;
    box-shadow: 0 1px 0 rgb(255 255 255 / 0.45) inset, 0 -2px 0 rgb(0 0 0 / 0.12) inset, 0 10px 30px -12px var(--lime-glow);
}

.button--lime::before {
    content: "";
    position: absolute;
    inset-block: 0;
    inset-inline-start: -60%;
    inline-size: 50%;
    z-index: -1;
    background: linear-gradient(100deg, transparent, rgb(255 255 255 / 0.55), transparent);
    transform: skewX(-18deg);
    transition: inset-inline-start 700ms var(--ease-out);
}

.button--lime:hover {
    --button-bg: var(--lime-400);
    box-shadow: 0 1px 0 rgb(255 255 255 / 0.45) inset, 0 -2px 0 rgb(0 0 0 / 0.12) inset, 0 0 0 3px rgb(200 255 77 / 0.2), 0 16px 40px -10px var(--lime-glow);
}

.button--lime:hover::before {
    inset-inline-start: 120%;
}

.button--ghost {
    --button-bg: rgb(255 255 255 / 0.02);
    --button-border: var(--line-strong);
}

.button--ghost:hover {
    --button-border: var(--violet-400);
    --button-bg: var(--violet-glow-soft);
}

.button--sm {
    min-block-size: 42px;
    padding: 0.6rem 1.05rem;
    font-size: var(--step--1);
}

.button--lg {
    min-block-size: 58px;
    padding: 1rem 1.7rem;
    font-size: var(--step-1);
}

.button--xl {
    min-block-size: 70px;
    padding: 1.15rem 2.2rem;
    font-size: clamp(1.08rem, 1rem + 0.6vw, 1.36rem);
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    min-block-size: 44px;
    font-weight: 700;
    color: var(--text-strong);
    text-decoration: none;
    background: linear-gradient(currentColor 0 0) 0 calc(100% - 10px) / 0 1px no-repeat;
    transition: background-size var(--dur-3) var(--ease-out), color var(--dur-2);
}

.text-link:hover {
    background-size: calc(100% - 1.6rem) 1px;
    color: var(--violet-300);
}

.text-link svg {
    inline-size: 1.1em;
    block-size: 1.1em;
    transition: transform var(--dur-3) var(--ease-out);
}

.text-link:hover svg {
    transform: translateY(2px);
}

@media (max-width: 560px) {
    .button--lg {
        font-size: var(--step-0);
        padding-inline: 1.2rem;
    }
}