.hero-v18-line-a {
    width: 200%;
    transform: rotate(12deg);
    transform-origin: left;
}

.hero-v18-line-b {
    width: 200%;
    transform: rotate(-12deg);
    transform-origin: right;
}

.hero-v18-col-left {
    transform-origin: top left;
}

.hero-v18-dot {
    width: 0.5rem;
    height: 0.5rem;
}

.hero-v18-icon-box {
    width: 2rem;
    height: 2rem;
}

.hero-v18-col-right {
    transform-origin: top right;
}

.hero-v18-decor-tr {
    top: -1rem;
    right: -1rem;
    width: 6rem;
    height: 6rem;
}

.hero-v18-decor-bl {
    bottom: -1rem;
    left: -1rem;
    width: 5rem;
    height: 5rem;
}

/* -- Button hover states -- */
.hero-btn-primary {
    transition: filter 0.2s ease, transform 0.15s ease;
}
.hero-btn-primary:hover,
.hero-btn-primary:focus {
    filter: brightness(1.12);
    transform: translateY(-1px);
}

.hero-btn-outline-secondary {
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.hero-btn-outline-secondary:hover,
.hero-btn-outline-secondary:focus {
    background-color: var(--bs-secondary) !important;
    color: #fff !important;
    border-color: var(--bs-secondary) !important;
    transform: translateY(-1px);
}

.hero-btn-outline-primary-light {
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.hero-btn-outline-primary-light:hover,
.hero-btn-outline-primary-light:focus {
    background-color: var(--bs-primary) !important;
    color: #fff !important;
    border-color: var(--bs-primary) !important;
    transform: translateY(-1px);
}
.trio-card-hover {
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.trio-card-icon {
    transition: transform 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.trio-card-hover:hover {
    transform: translateY(-0.375rem);
    box-shadow: var(--bs-box-shadow-lg);
    border-color: rgba(var(--bs-primary-rgb), 0.35) !important;
}

.trio-card-hover:hover .trio-card-icon {
    transform: scale(1.06);
    background-color: var(--bs-primary);
    color: var(--bs-white);
}

.feature-card-surface {
    position: relative;
    isolation: isolate;
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color-translucent) !important;
    box-shadow: var(--bs-box-shadow-sm);
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card-surface:hover {
    box-shadow: var(--bs-box-shadow-lg);
    border-color: rgba(var(--bs-primary-rgb), 0.35) !important;
}

/* -- Feature card hover -- */
.feat-card-hover {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feat-card-hover:hover {
    transform: translateY(-3px);
    box-shadow: 0 0.5rem 1.5rem rgba(0,0,0,.12) !important;
}

/* -- Icon box sizing -- */
.feat-icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    min-width: 2.5rem;
    min-height: 2.5rem;
}
.feat-icon-box--lg {
    width: 4rem;
    height: 4rem;
    border-radius: 0.75rem;
}
.feat-icon-box--xl {
    width: 5rem;
    height: 5rem;
    border-radius: 1rem;
}
.feat-icon-box--circle {
    border-radius: 50%;
}

/* -- Nav/filmstrip button hover -- */
.feat-btn-nav {
    transition: transform 0.15s ease, background-color 0.15s ease;
}
.feat-btn-nav:hover {
    transform: scale(1.1);
}

/* -- Table row hover -- */
.feat-table-row-hover {
    transition: background-color 0.15s ease;
}
.feat-table-row-hover:hover {
    background-color: var(--bs-primary-bg-subtle) !important;
}

/* -- Accordion item hover -- */
.feat-accordion-hover summary:hover {
    background-color: var(--bs-primary-bg-subtle);
    border-radius: 0.75rem;
}

/* -- DL item hover -- */
.feat-dl-item-hover {
    transition: background-color 0.15s ease;
    border-radius: 0.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}
.feat-dl-item-hover:hover {
    background-color: var(--bs-primary-bg-subtle);
}

/* -- Deck button hover -- */
.feat-deck-btn {
    transition: filter 0.2s ease, transform 0.15s ease;
}
.feat-deck-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}
@keyframes perks-stats-stack-rotate-kf {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.perks-stats-stack__square {
    animation: perks-stats-stack-rotate-kf 30s linear infinite;
}

.perks-stats-stack__square--slow {
    animation-duration: 36s;
}

.perks-stats-stack__feat-thumb {
    width: 2rem;
    height: 2rem;
}

.perks-stats-stack__row-thumb {
    width: 3rem;
    height: 3rem;
}

.perks-stats-stack__feat,
.perks-stats-stack__row {
    transition: transform 0.2s ease;
}

@media (min-width: 640px) {
    .perks-stats-stack__feat:hover {
        transform: scale(1.05);
    }

    .perks-stats-stack__row:hover {
        transform: scale(1.05);
    }
}

/* v12 - Horizontal carousel: flex track with explicit gap (framework-independent — works under both TW and BS, since BS has no row/col-safe equivalent for a gapped scroll track) */
.steps-gradient-carousel__track {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-behavior: smooth;
}

.steps-gradient-carousel__track::-webkit-scrollbar {
    display: none;
}

.steps-gradient-carousel__card {
    width: 260px;
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .steps-gradient-carousel__card {
        width: 300px;
    }
}

/* prev/next controls: fixed circle size, no Bootstrap utility equivalent */
.steps-gradient-carousel__arrow {
    width: 2.75rem;
    height: 2.75rem;
}

/* icon badge: fixed square size, no Bootstrap width/height utility beyond w-25/50/75/100 */
.steps-gradient-carousel__badge {
    width: 3.5rem;
    height: 3.5rem;
}

/* FAQ v18 — accordion mechanics */
.faq-accordion-panel {
    max-height: 0;
}

.faq-accordion-icon.solver-hints-symbol-reveal {
    transform: rotate(180deg);
}


.halo-signup__section {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

.halo-signup__inner {
    max-width: 64rem;
}

@keyframes halo-signup-spark-beat-track {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}
.halo-signup__spark--beat {
    animation: halo-signup-spark-beat-track 2s cubic-bezier(.4,0,.6,1) infinite;
}

.halo-signup__jump--rise:hover { transform: scale(1.05); transition: transform .2s ease; }