html,
body {
    margin: 0;
    min-height: 100%;
    background: var(--hos-bg-base, #101417);
}

#blazor-error-ui {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    display: none;
    padding: 0.75rem 1rem;
    background: #ffe8e6;
    color: #48120e;
    font-family: var(--hos-font-mono, "Cascadia Mono", Consolas, monospace);
}

#blazor-error-ui .dismiss {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    cursor: pointer;
}

.loading-progress {
    position: absolute;
    inset: 20vh 0 auto;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 0 auto;
}

.loading-progress circle {
    fill: none;
    stroke: #36505d;
    stroke-width: 0.6rem;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

.loading-progress circle:last-child {
    stroke: var(--hos-accent, #42d392);
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
}

.loading-progress-text {
    position: absolute;
    inset: calc(20vh + 3.25rem) 0 auto;
    color: var(--hos-text-primary, #f4f7f8);
    font-family: var(--hos-font-mono, "Cascadia Mono", Consolas, monospace);
    text-align: center;
}

.loading-progress-text::after {
    content: var(--blazor-load-percentage-text, "Loading");
}

/* ADR 0099 §3: fatal boot-error screen of index.html (damaged PWA cache). The boot guard
   adds .hackeros-boot-failed to <html> and sets data-state on the panel. Blazor's own
   error bar and the progress ring are hidden: the panel explains the failure instead. */
.hackeros-boot-failed .loading-progress,
.hackeros-boot-failed .loading-progress-text,
.hackeros-boot-failed #blazor-error-ui {
    display: none !important;
}

#hackeros-boot-error {
    position: fixed;
    inset: 0;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.75rem;
    box-sizing: border-box;
    max-width: 44rem;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    color: var(--hos-text-primary, #f4f7f8);
    font-family: var(--hos-font-mono, "Cascadia Mono", Consolas, monospace);
    line-height: 1.5;
}

#hackeros-boot-error[hidden] {
    display: none;
}

#hackeros-boot-error h1 {
    margin: 0 0 0.5rem;
    padding-left: 0.75rem;
    border-left: 0.25rem solid #ff5f56;
    font-size: 1.35rem;
    letter-spacing: 0.04em;
}

#hackeros-boot-error h1::before {
    content: "[ boot ] ";
    color: #ff5f56;
}

#hackeros-boot-error p {
    display: none;
    margin: 0;
}

#hackeros-boot-error[data-state="repairing"] .boot-error-repairing,
#hackeros-boot-error[data-state="offline"] .boot-error-offline,
#hackeros-boot-error[data-state="retrying"] .boot-error-retrying,
#hackeros-boot-error[data-state="failed"] .boot-error-failed {
    display: block;
}

#hackeros-boot-error[data-state="repairing"] .boot-error-repairing::after {
    content: " _";
    animation: hackeros-boot-cursor 1s steps(1) infinite;
}

#hackeros-boot-error .boot-error-detail:not(:empty) {
    display: block;
    padding: 0.5rem 0.75rem;
    overflow-wrap: anywhere;
    background: #172025;
    color: var(--hos-text-secondary, #a8bac4);
    font-size: 0.8rem;
}

#hackeros-boot-error .boot-error-retry {
    align-self: flex-start;
    margin-top: 0.5rem;
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--hos-accent, #42d392);
    background: transparent;
    color: var(--hos-accent, #42d392);
    font: inherit;
    cursor: pointer;
}

#hackeros-boot-error .boot-error-retry:hover,
#hackeros-boot-error .boot-error-retry:focus-visible {
    background: var(--hos-accent, #42d392);
    color: #101417;
    outline: none;
}

#hackeros-boot-error[data-state="repairing"] .boot-error-retry {
    display: none;
}

@keyframes hackeros-boot-cursor {
    50% {
        opacity: 0;
    }
}