.m-treatment-interval__head {
    max-width: 62ch;
    margin: 0 auto var(--space-8);
    text-align: center;
}
.m-treatment-interval__head .lead { margin-top: var(--space-3); }

/* --- Desktop: horizontale Timeline ---------------------------------------- */
.m-treatment-interval__track {
    --ti-gap: var(--space-5);
    --ti-dot: 24px;
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: var(--ti-gap);
    grid-template-columns: repeat(3, 1fr);
}
.m-treatment-interval__track[data-points="2"] { grid-template-columns: repeat(2, 1fr); }
.m-treatment-interval__track[data-points="4"] { grid-template-columns: repeat(4, 1fr); }

.m-treatment-interval__point {
    position: relative;
    text-align: center;
    padding-top: 52px;          /* Platz für Marker + Verbindungslinie */
}
.m-treatment-interval__marker {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    display: block;
    width: var(--ti-dot);
    height: var(--ti-dot);
    z-index: 1;   /* Punkt liegt über der Verbindungslinie des Nachfolgers */
}
.m-treatment-interval__dot {
    display: block;
    width: var(--ti-dot);
    height: var(--ti-dot);
    border-radius: 50%;
    background: var(--gradient-primary, var(--color-primary));
    box-shadow: 0 0 0 6px var(--color-primary-soft);
}

/* Gepunktete Linie von der Mitte des Vorgänger-Punkts bis zu diesem Punkt */
.m-treatment-interval__point:not(:first-child)::before {
    content: '';
    position: absolute;
    top: calc(var(--ti-dot) / 2 - 1px);
    left: calc(-50% - var(--ti-gap));
    width: calc(100% + var(--ti-gap));
    height: 2px;
    background-image: linear-gradient(to right, var(--color-border) 50%, transparent 50%);
    background-size: 10px 2px;
    background-repeat: repeat-x;
}
/* „+ 4 Monate“-Pille sitzt mittig auf der Linie und unterbricht sie optisch */
.m-treatment-interval__gap {
    position: absolute;
    top: calc(var(--ti-dot) / 2);
    left: calc(-1 * var(--ti-gap) / 2);
    transform: translate(-50%, -50%);
    white-space: nowrap;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    color: var(--color-text-muted);
    line-height: 1.3;
}

.m-treatment-interval__month {
    display: inline-block;
    padding: 4px 12px;
    margin-bottom: var(--space-3);
    border-radius: var(--radius-pill);
    background: var(--color-primary-soft);
    color: var(--color-primary);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.04em;
}
.m-treatment-interval__body h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-2);
}
.m-treatment-interval__body p {
    color: var(--color-text-muted);
    font-size: var(--fs-sm);
    margin: 0;
}

.m-treatment-interval__note {
    max-width: 74ch;
    margin: var(--space-8) auto 0;
    padding: var(--space-6);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}
.m-treatment-interval__note p { color: var(--color-text-muted); }
.m-treatment-interval__note p:last-of-type { margin-bottom: 0; }
.m-treatment-interval__note .btn { margin-top: var(--space-5); }

/* --- Smartphone: vertikale Timeline --------------------------------------- */
@media (max-width: 760px) {
    .m-treatment-interval__track,
    .m-treatment-interval__track[data-points="2"],
    .m-treatment-interval__track[data-points="4"] {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .m-treatment-interval__point {
        text-align: left;
        padding: 0 0 var(--space-7) 48px;
    }
    .m-treatment-interval__point:last-child { padding-bottom: 0; }
    .m-treatment-interval__marker {
        top: 2px;
        left: 0;
        transform: none;
    }
    /* Linie läuft senkrecht vom Vorgänger herunter */
    .m-treatment-interval__point:not(:first-child)::before {
        top: auto;
        bottom: calc(100% - 2px);
        left: calc(var(--ti-dot) / 2 - 1px);
        width: 2px;
        height: var(--space-7);
        background-image: linear-gradient(to bottom, var(--color-border) 50%, transparent 50%);
        background-size: 2px 10px;
        background-repeat: repeat-y;
    }
    .m-treatment-interval__gap {
        position: static;
        transform: none;
        display: inline-block;
        margin: 0 0 var(--space-3);
    }
    .m-treatment-interval__note { text-align: left; }
}