/* ============================================================================
   kHouse Dossier · Side-dots scroll-spy nav
   ----------------------------------------------------------------------------
   Vertical rail pinned to the right edge. Each link is a tiny dot plus a
   visually-hidden label kept for screen readers; the rail is hidden on
   touch / small viewports where the top header nav already covers chapter
   jumps. Behavior is wired up in js/kd-sidedots.js.
   ============================================================================ */

.kd-sidedots {
    position: fixed;
    top: 50%;
    right: 24px;
    transform: translateY(-50%);
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 16px 14px;
    background: rgba(var(--kd-bg-rgb), 0.92);
    border: 1px solid var(--kd-border);
    /* No backdrop-filter: older Safari has hit-testing bugs that capture
       wheel/scroll events on backdrop-filtered fixed elements. */
}
.kd-sidedots a {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--kd-fg-muted);
    font-family: var(--kd-font-mono);
    font-size: 10px;
    letter-spacing: var(--kd-track-mono);
    text-transform: uppercase;
    line-height: 1;
    transition: color var(--kd-dur) var(--kd-ease);
    white-space: nowrap;
}
.kd-sidedots__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--kd-fg-muted);
    box-sizing: border-box;
    transition: background var(--kd-dur) var(--kd-ease),
                border-color var(--kd-dur) var(--kd-ease),
                transform var(--kd-dur) var(--kd-ease);
    flex-shrink: 0;
}
.kd-sidedots__label {
    /* hidden visually; kept in DOM for screen readers */
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}
.kd-sidedots a:hover { color: var(--kd-fg); }
.kd-sidedots a:hover .kd-sidedots__dot { border-color: var(--kd-fg); }
.kd-sidedots a.is-active {
    color: var(--kd-fg);
}
.kd-sidedots a.is-active .kd-sidedots__dot {
    background: var(--kd-accent, var(--kd-fg));
    border-color: var(--kd-accent, var(--kd-fg));
    transform: scale(1.25);
}
@media (max-width: 1100px) {
    .kd-sidedots { display: none; }
}
@media (prefers-reduced-motion: reduce) {
    .kd-sidedots a, .kd-sidedots__dot, .kd-sidedots__label { transition: none; }
}