.b64h {
    --pk-accent: #fd3367;
    --pk-accent-dark: #500b28;
    --pk-gradient: linear-gradient(45deg, #fd3367, #663399);
    --pk-ink: #212529;
    --pk-muted: #6c757d;
    --pk-border: #dee2e6;
    --pk-field-bg: #fff;
    --pk-error: #e21c34;
    --pk-success: #1e7e34;
    max-width: 60rem;
    margin: 0 auto;
    color: var(--pk-ink);
}

.b64h__title {
    font-family: "Montserrat-ExtraBold", sans-serif;
    letter-spacing: .02em;
    margin: 0 0 1rem;
    color: var(--pk-accent-dark);
}

.b64h__intro {
    font-family: "Montserrat-Regular", sans-serif;
    font-size: .9rem;
    color: var(--pk-muted);
    margin: 0 0 1.25rem;
    line-height: 1.5;
}

.b64h__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    gap: 1.25rem;
}

.b64h__field {
    display: flex;
    flex-direction: column;
    gap: .4rem;
    margin: 0;
}

.b64h__label {
    font-family: "Montserrat-SemiBold", sans-serif;
    font-size: .8rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--pk-accent);
}

.b64h__input,
.b64h__output,
.hash__input {
    font-family: "Menlo", "Consolas", monospace;
    font-size: .95rem;
    line-height: 1.5;
    color: var(--pk-ink);
    padding: .75rem;
    border: 1px solid var(--pk-border);
    border-radius: .25rem;
    background: var(--pk-field-bg);
    resize: vertical;
    width: 100%;
    box-sizing: border-box;
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.b64h__input:focus,
.b64h__output:focus,
.hash__input:focus {
    outline: 0;
    border-color: var(--pk-accent);
    box-shadow: 0 0 0 .2rem rgba(253, 51, 103, .25);
}

.b64h__output {
    background: #fbfbfc;
}

.b64h__controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem 1.5rem;
    margin-top: 1.25rem;
}

/* --- shared .pk-switch idiom ----------------------------------------- */
.pk-switch {
    display: inline-flex;
    align-items: center;
    gap: .75rem;
    font-family: "Montserrat-SemiBold", sans-serif;
    font-size: .82rem;
    letter-spacing: .04em;
    color: var(--pk-muted);
    user-select: none;
}

.pk-switch__side { transition: color .15s ease; }
.pk-switch__side--on { color: var(--pk-accent-dark); }

.pk-switch__toggle {
    appearance: none;
    border: 0;
    width: 3.25rem;
    height: 1.6rem;
    border-radius: 1rem;
    background: var(--pk-gradient);
    cursor: pointer;
    padding: 0;
    position: relative;
    flex: none;
}

.pk-switch__toggle:focus-visible {
    outline: 0;
    box-shadow: 0 0 0 .2rem rgba(253, 51, 103, .35);
}

.pk-switch__thumb {
    position: absolute;
    top: .2rem;
    left: .2rem;
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
    transition: transform .18s ease;
}

.pk-switch__toggle[aria-checked="true"] .pk-switch__thumb {
    transform: translateX(1.65rem);
}

.b64h__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    margin-left: auto;
}

.b64h__btn {
    appearance: none;
    border: 0;
    border-radius: .25rem;
    padding: .75rem 1.5rem;
    font-family: "Montserrat-ExtraBold", sans-serif;
    font-size: .9rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #fff;
    background: var(--pk-gradient);
    cursor: pointer;
    transition: filter .3s ease, transform .1s ease;
}

.b64h__btn:hover { filter: brightness(1.08); }
.b64h__btn:active { transform: translateY(1px); }

.b64h__btn--ghost {
    color: var(--pk-accent-dark);
    background: transparent;
    border: 1px solid var(--pk-border);
}

.b64h__btn--ghost:hover {
    filter: none;
    border-color: var(--pk-accent);
    color: var(--pk-accent);
}

.b64h__status {
    margin: 1rem 0 0;
    font-family: "Montserrat-SemiBold", sans-serif;
    font-size: .85rem;
    min-height: 1.2em;
    flex-basis: 100%;
}

.b64h__status--error { color: var(--pk-error); }
.b64h__status--success { color: var(--pk-success); }

/* --- hash generator -------------------------------------------------- */
.hash__results {
    display: flex;
    flex-direction: column;
    gap: .6rem;
    margin-top: 1.25rem;
}

.hash__row {
    display: grid;
    grid-template-columns: 5.5rem 1fr auto;
    align-items: center;
    gap: .75rem 1rem;
    padding: .6rem .75rem;
    border: 1px solid var(--pk-border);
    border-radius: .25rem;
    background: #fbfbfc;
}

.hash__algo {
    font-family: "Montserrat-ExtraBold", sans-serif;
    font-size: .78rem;
    letter-spacing: .06em;
    color: var(--pk-accent-dark);
}

.hash__value {
    font-family: "Menlo", "Consolas", monospace;
    font-size: .82rem;
    color: var(--pk-ink);
    word-break: break-all;
    min-height: 1.2em;
}

.hash__copy {
    padding: .4rem .9rem;
    font-size: .72rem;
}

@media (max-width: 34rem) {
    .hash__row {
        grid-template-columns: 1fr;
    }
    .hash__copy { justify-self: start; }
}