/* ============= Scroll Indicator Landscape (Ferrari-style thin ring) ============= */
.sil-indicator {
    position: fixed;
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    z-index: 1000;
    pointer-events: none;
    --sil-ring-bg: rgba(255,255,255,0.25);
}

/* Column */
.sil-indicator .sil-dots {
    display: flex;
    flex-direction: column;
    gap: 14px;
    pointer-events: auto;
}

/* Core dot */
.sil-indicator .sil-dot {
    position: relative;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #0c0c0c; /* dark center */
    outline: none;
    border: none;
    cursor: pointer;
    padding: 0;
    transition: transform .2s ease, background .2s ease, opacity .2s ease;
    opacity: .9;
}

/* Thin progress ring */
.sil-indicator .sil-dot::after {
    content: "";
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: conic-gradient(#B12B21 var(--sil-progress, 0%), var(--sil-ring-bg) 0);
    -webkit-mask:
            radial-gradient(farthest-side, transparent calc(100% - 2px), #000 0); /* makes ring thin */
    mask:
            radial-gradient(farthest-side, transparent calc(100% - 2px), #000 0);
    transition: background .15s linear;
}

/* Active state (white center) */
.sil-indicator .sil-dot.is-active {
    background: #fff;
    transform: scale(1.05);
}

/* ===== Inline section name ===== */
.sil-indicator .sil-dot .sil-name {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
    white-space: nowrap;
    user-select: none;
    pointer-events: none;
    opacity: 0;
    color: #111;
    transition: opacity .18s ease, color .18s ease;
}

.sil-indicator.sil-reveal .sil-dot .sil-name { opacity: .9; }
.sil-indicator .sil-dot.is-active .sil-name {
    opacity: 1;
    color: #B12B21;
}

/* Back-to-top */
.sil-indicator .sil-top {
    margin-top: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.2);
    cursor: pointer;
    pointer-events: auto;
    transition: background .2s ease, border-color .2s ease;
}
.sil-indicator .sil-top svg { width: 16px; height: 16px; fill: #fff; }
.sil-indicator .sil-top:hover {
    background: rgba(255,255,255,0.16);
    border-color: rgba(255,255,255,0.32);
}

/* Light mode */
@media (prefers-color-scheme: light) {
    .sil-indicator { --sil-ring-bg: rgba(25,25,25,0.25); }
    .sil-indicator .sil-dot { background: #f0f0f0; }
    .sil-indicator .sil-dot.is-active { background: #111; }
    .sil-indicator .sil-top { background: rgba(0,0,0,0.06); border-color: rgba(0,0,0,0.18); }
    .sil-indicator .sil-top:hover { background: rgba(0,0,0,0.1); border-color: rgba(0,0,0,0.28); }
}

/* Hidden breakpoint */
.sil-indicator.is-hidden { display: none !important; }