/* ================================================================
   ByteSide.io — "About This Byte" Modal (modules/about-system.js)
   --------------------------------------------------------------
   macOS-style "About This Mac" card, opened via menubar-logo click.
   Plain fixed overlay (NO <dialog> top-layer — power overlay at
   z=9500 must stay above). z=4400: below context-menu (4500),
   above mission control (4000+).
   ================================================================ */

/* Logo wird via JS interaktiv (role=button) — Affordance hier. */
.menubar__logo {
    cursor: pointer;
    border-radius: 5px;
    padding: 2px 6px;
    margin-left: -6px;
    transition: background var(--byte-t-fast);
}
.menubar__logo:hover { background: rgba(255, 255, 255, 0.06); }
.menubar__logo:focus-visible {
    outline: 2px solid var(--byte-primary);
    outline-offset: 1px;
}

.about-sys {
    position: fixed;
    inset: 0;
    z-index: 4400;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(4, 10, 14, 0.55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    animation: about-sys-fade 140ms ease-out;
}
.about-sys[hidden] { display: none; }

@keyframes about-sys-fade {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.about-sys__card {
    width: min(340px, calc(100vw - 32px));
    padding: 28px 26px 22px;
    text-align: center;
    background: rgba(20, 38, 46, 0.97);
    border: 1px solid var(--byte-border-strong);
    border-radius: var(--byte-r-md);
    box-shadow: var(--byte-shadow-pop);
    animation: about-sys-pop 140ms ease-out;
}
@keyframes about-sys-pop {
    from { opacity: 0; transform: scale(0.96) translateY(6px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.about-sys__logo {
    display: block;
    margin: 0 auto 12px;
    filter: drop-shadow(0 0 14px var(--byte-primary-glow));
}

.about-sys__name {
    font-family: var(--byte-font-mono);
    font-size: 20px;
    font-weight: 700;
    color: var(--byte-text);
    letter-spacing: 0.02em;
}

.about-sys__version {
    margin-top: 2px;
    font-family: var(--byte-font-mono);
    font-size: 12px;
    color: var(--byte-text-muted);
}

.about-sys__tagline {
    margin-top: 6px;
    font-family: var(--byte-font-mono);
    font-size: 11px;
    color: var(--byte-text-subtle);
}

.about-sys__rows {
    margin: 18px 0 0;
    padding: 12px 2px 0;
    border-top: 1px solid var(--byte-border);
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 12px;
}
.about-sys__row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
}
.about-sys__row dt {
    color: var(--byte-text-subtle);
    font-family: var(--byte-font-mono);
}
.about-sys__row dd {
    margin: 0;
    color: var(--byte-text);
    font-family: var(--byte-font-mono);
}

.about-sys__actions {
    margin-top: 18px;
    display: flex;
    justify-content: center;
    gap: 10px;
}
.about-sys__btn {
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--byte-text-muted);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--byte-border-strong);
    border-radius: var(--byte-r-sm);
    transition: background var(--byte-t-fast), color var(--byte-t-fast);
}
.about-sys__btn:hover {
    background: rgba(255, 255, 255, 0.10);
    color: var(--byte-text);
}
.about-sys__btn--primary {
    color: var(--byte-bg);
    background: var(--byte-primary);
    border-color: var(--byte-primary);
}
.about-sys__btn--primary:hover {
    background: var(--byte-primary-hover);
    color: var(--byte-bg);
}
.about-sys__btn:focus-visible {
    outline: 2px solid var(--byte-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .about-sys,
    .about-sys__card { animation: none; }
    .menubar__logo { transition: none; }
}