/* ============================================================
   Maintenance overlay + banner + toasts
   Spec: docs/specs/2026-06-22-server-event-stream-design.md §9
   ============================================================ */

:root {
    --m-accent-red:   #dc2626;
    --m-accent-amber: #f59e0b;
    --m-card-bg:      #ffffff;
    --m-card-text:    #1a1a1a;
    --m-card-muted:   #555555;
    --m-backdrop:     rgba(15, 17, 23, 0.72);
    --m-banner-bg:    #fef3c7;
    --m-banner-text:  #78350f;
    --m-banner-border:#f59e0b;
    --m-toast-bg:     #1e293b;
    --m-toast-text:   #f1f5f9;
}

[data-theme="blanc"] {
    --m-card-bg:    #ffffff;
    --m-card-text:  #1a1a1a;
    --m-card-muted: #555555;
}

/* Default dark themes get a darker card to fit the look. */
[data-theme="dracula"], [data-theme="nord"], [data-theme="catppuccin"],
[data-theme="tokyo-night"], [data-theme="old-steam"] {
    --m-card-bg:    #1a1d27;
    --m-card-text:  #e2e8f0;
    --m-card-muted: #94a3b8;
}

/* ---- Overlay ------------------------------------------------ */
#maintenance-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 150ms ease-out;
}

#maintenance-overlay:not([hidden]) {
    opacity: 1;
}

#maintenance-overlay[hidden] {
    display: none;
}

#maintenance-overlay.fading-out {
    opacity: 0;
    transition: opacity 300ms ease-in;
}

#maintenance-overlay .overlay-backdrop {
    position: absolute;
    inset: 0;
    background: var(--m-backdrop);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

#maintenance-overlay .overlay-card {
    position: relative;
    max-width: 420px;
    width: calc(100% - 2rem);
    padding: 1.75rem 1.5rem;
    background: var(--m-card-bg);
    color: var(--m-card-text);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    text-align: center;
    border-top: 4px solid var(--m-accent-red);
}

#maintenance-overlay .overlay-card[data-cause="degraded"],
#maintenance-overlay .overlay-card[data-cause="unreachable"] {
    border-top-color: var(--m-accent-red);
}

#maintenance-overlay .overlay-card[data-cause="shutdown"],
#maintenance-overlay .overlay-card[data-cause="scheduled"] {
    border-top-color: var(--m-accent-amber);
}

#maintenance-overlay h2 {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
    outline: none;
}

#maintenance-overlay p {
    margin: 0.25rem 0;
    font-size: 0.95rem;
}

#maintenance-overlay .overlay-muted {
    color: var(--m-card-muted);
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

#maintenance-overlay .overlay-countdown {
    font-size: 2rem;
    font-weight: 600;
    margin: 0.5rem 0;
    color: var(--m-accent-amber);
}

#maintenance-overlay .overlay-card[data-cause="degraded"] .overlay-countdown,
#maintenance-overlay .overlay-card[data-cause="unreachable"] .overlay-countdown {
    color: var(--m-accent-red);
}

/* ---- Spinner ------------------------------------------------ */
#maintenance-overlay .overlay-spinner {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    border: 4px solid rgba(0, 0, 0, 0.08);
    border-top-color: var(--m-accent-red);
    animation: m-spin 0.9s linear infinite;
}

#maintenance-overlay .overlay-card[data-cause="shutdown"] .overlay-spinner,
#maintenance-overlay .overlay-card[data-cause="scheduled"] .overlay-spinner {
    border-top-color: var(--m-accent-amber);
}

@keyframes m-spin {
    to { transform: rotate(360deg); }
}

/* ---- Banner ------------------------------------------------- */
#maintenance-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9998;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    background: var(--m-banner-bg);
    color: var(--m-banner-text);
    border-bottom: 1px solid var(--m-banner-border);
    font-size: 0.9rem;
    transition: transform 200ms ease-out;
}

#maintenance-banner[hidden] {
    display: none;
}

#maintenance-banner .banner-icon {
    font-size: 1.1rem;
}

#maintenance-banner .banner-msg {
    flex: 1;
}

#maintenance-banner .banner-detail {
    color: inherit;
    opacity: 0.85;
    margin-left: 0.5rem;
    font-style: italic;
}

#maintenance-banner #b-dismiss {
    background: transparent;
    border: 0;
    color: inherit;
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 0.5rem;
}

#maintenance-banner #b-dismiss:hover {
    opacity: 0.7;
}

/* ---- Toasts ------------------------------------------------- */
#toast-container {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 9997;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

#toast-container .toast {
    background: var(--m-toast-bg);
    color: var(--m-toast-text);
    padding: 0.65rem 1rem;
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    font-size: 0.9rem;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 200ms ease-out, transform 200ms ease-out;
    pointer-events: auto;
    max-width: 320px;
}

#toast-container .toast.visible {
    opacity: 1;
    transform: translateY(0);
}

#toast-container .toast.toast-success {
    background: #166534;
}

#toast-container .toast.toast-error {
    background: #991b1b;
}

/* ---- prefers-reduced-motion --------------------------------- */
@media (prefers-reduced-motion: reduce) {
    #maintenance-overlay,
    #maintenance-overlay.fading-out,
    #maintenance-banner,
    #toast-container .toast {
        transition: none;
    }
    #maintenance-overlay .overlay-spinner {
        animation: none;
        border-top-color: transparent;
    }
}