/* ========================================
   Step timeline — numbered connector between step cards
   ======================================== */

/* Horizontal timeline layout (desktop) */
.section--step-grid .card-grid--steps {
    display: flex;
    flex-direction: row;
    gap: 0;
    counter-reset: step-counter;
    align-items: stretch;
    position: relative;
}

.section--step-grid .card-grid--steps .card--numbered {
    flex: 1;
    counter-increment: step-counter;
    position: relative;
    margin: 0;
    padding-top: var(--space-4xl);
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* Connector line between step cards */
.section--step-grid .card-grid--steps::before {
    content: "";
    position: absolute;
    top: calc(var(--space-lg) + 24px);
    left: 25%;
    right: 25%;
    height: 0;
    border-top: 2px dashed var(--border-color-light);
    z-index: 0;
}

/* Numbered badge — large, circular, accent-colored */
.section--step-grid .card-grid--steps .card--numbered::before {
    content: counter(step-counter);
    position: absolute;
    top: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-accent);
    color: var(--primary-accent-contrast);
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.3em;
    z-index: 1;
}

.section--step-grid .card-grid--steps .card--numbered:nth-child(1) { transition-delay: 0.0s; }
.section--step-grid .card-grid--steps .card--numbered:nth-child(2) { transition-delay: 0.15s; }
.section--step-grid .card-grid--steps .card--numbered:nth-child(3) { transition-delay: 0.3s; }

/* Visible state for stagger animation (toggled by IntersectionObserver via stagger-parent) */
.stagger-parent.is-visible .card--numbered {
    opacity: 1;
    transform: translateY(0);
}

/* Dark mode connector */
.dark-mode .section--step-grid .card-grid--steps::before {
    border-top-color: var(--border-color-dark);
}

.dark-mode .section--step-grid .card-grid--steps .card--numbered:not(:last-child)::after {
    border-left-color: var(--border-color-dark);
}

/* Mobile — vertical timeline */
@media (max-width: 599px) {
    .section--step-grid .card-grid--steps {
        flex-direction: column;
    }

    .section--step-grid .card-grid--steps .card--numbered {
        padding-top: 0;
        padding-left: var(--space-4xl);
    }

    .section--step-grid .card-grid--steps .card--numbered::before {
        top: var(--space-lg);
        left: 0;
        transform: none;
        width: 36px;
        height: 36px;
        font-size: 1.1em;
    }

    /* Vertical connector line on the left (card-level, not grid-level) */
    .section--step-grid .card-grid--steps .card--numbered:not(:last-child)::after {
        top: calc(var(--space-lg) + 36px);
        left: 18px;
        right: auto;
        width: 0;
        height: calc(100% - var(--space-lg) - 24px);
        border-top: none;
        border-left: 2px dashed var(--border-color-light);
    }
}