:root {
    --paper: #F5F4F0;
    --ink: #10151C;
    --ink-2: #1B232F;
        --signal: #2563ff;
    --signal-dark: #1e56e4;
    --text-muted: #5B6470;
    --font-display: 'Archivo', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
}

.btn-custom {
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 24px;
    border-radius: 12px;
    margin-right: 15px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 15px;
    text-decoration: none;
    cursor: pointer;
    border: 1.6px solid var(--ink);
    color: var(--ink);
    background: transparent;
    transition: opacity .5s ease, transform .5s ease, color .3s ease, border-color .3s ease;
}

.row.in-view .btn-custom {
    opacity: 1;
    transform: none;
}

.row.in-view .btn-custom:nth-child(1) {
    transition-delay: .05s;
}

.row.in-view .btn-custom:nth-child(2) {
    transition-delay: .12s;
}

.row.in-view .btn-custom:nth-child(3) {
    transition-delay: .19s;
}

.row.in-view .btn-custom:nth-child(4) {
    transition-delay: .26s;
}

.row.in-view .btn-custom:nth-child(5) {
    transition-delay: .33s;
}

/* fill-sweep layer, shared by every button */
.btn-custom::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--fill, var(--ink));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .32s cubic-bezier(.4, 0, .2, 1);
    z-index: 0;
}

.btn-custom:hover::before,
.btn-custom:focus-visible::before {
    transform: scaleX(1);
}

.btn-custom span,
.btn-custom svg {
    position: relative;
    z-index: 1;
}

.btn-custom:hover,
.btn-custom:focus-visible {
    color: #fff;
    border-color: var(--fill, var(--ink));
}

.btn-custom:focus-visible {
    outline: 2px solid var(--signal);
    outline-offset: 3px;
}

.btn-custom .icon2 {
    width: 19px;
    height: 19px;
    flex-shrink: 0;
    transition: transform .3s ease;
}

/* tier 1 — primary, solid by default */
.btn-custom.btn-primary {
    background: var(--ink);
    color: #fff;
    --fill: var(--ink-2);
    animation: ctaPulse 1.8s ease-in-out infinite;
}

.btn-custom.btn-primary:hover .icon2.download-2 {
    transform: translateY(3px);
}

@keyframes ctaPulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.btn-custom.btn-primary::after {
    content: "";
    position: absolute;
    top: 0;
    left: -60%;
    width: 35%;
    height: 100%;
    background: linear-gradient(75deg, transparent, rgba(255, 255, 255, 0.55), transparent);
    transform: skewX(-20deg);
    pointer-events: none;
    animation: ctaShimmer 2.6s ease-in-out infinite;
    z-index: 0;
}

@keyframes ctaShimmer {
    0% {
        left: -60%;
    }

    30% {
        left: 130%;
    }

    100% {
        left: 130%;
    }
}

/* tier 2 — accent outline (purchase action) */
.btn-custom.btn-accent {
    border-color: var(--signal);
    color: var(--signal-dark);
    --fill: var(--signal);
}

.btn-custom.btn-accent:hover,
.btn-custom.btn-accent:focus-visible {
    border-color: var(--signal);
}

.btn-custom.btn-accent:hover .icon2.tag2 {
    transform: rotate(10deg);
}

/* tier 3 — quiet outline */
.btn-custom.btn-quiet {
    color: var(--text-muted);
    border-color: rgba(16, 21, 28, 0.25);
    --fill: var(--ink);
}

.btn-custom.btn-quiet:hover .icon2.headset {
    transform: translateY(-2px);
}

.btn-custom.btn-quiet:hover .icon2.mail {
    transform: translateY(-1px);
}

.ms-grid {
    display: flex;
    flex-wrap: wrap;
    width: 16px;
    height: 16px;
    gap: 2px;
    flex-shrink: 0;
}

.ms-grid span {
    display: block;
    width: 7px;
    height: 7px;
}

.btn-custom:hover,
.btn-custom:focus-visible {
    color: #fff;
    border-color: var(--fill, var(--ink));
}

@media (max-width:640px) {
    .btn-custom {
        flex: 1 1 100%;
        justify-content: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .btn-custom {
        transition: none !important;
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }

    .btn-custom::before {
        transition: none !important;
    }

    .btn-custom .icon2 {
        transition: none !important;
    }
}