.phase10-runtime {
    --runtime-ink: #10213a;
    --runtime-muted: #607089;
    --runtime-panel: #ffffff;
    --runtime-border: #d9e3ef;
    --runtime-accent: #1769aa;
    position: relative;
    color: var(--runtime-ink);
}

.ea-dark-scheme .phase10-runtime {
    --runtime-ink: #edf6ff;
    --runtime-muted: #b6c5d8;
    --runtime-panel: #172235;
    --runtime-border: #33445e;
    --runtime-accent: #71c7ff;
}

.runtime-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.runtime-kicker {
    margin: 0.55rem 0 0;
    color: var(--runtime-muted);
}

.runtime-state-card {
    min-width: 9.5rem;
    padding: 0.7rem 1rem;
    border: 1px solid var(--runtime-border);
    border-radius: 0.8rem;
    background: var(--runtime-panel);
    box-shadow: 0 0.35rem 1rem rgb(16 33 58 / 8%);
    text-align: right;
}

.runtime-state-card span {
    display: block;
    color: var(--runtime-muted);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.runtime-state-card strong {
    color: var(--runtime-accent);
    font-size: 1.1rem;
}

.runtime-layout {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(17rem, 1fr);
    gap: 1.25rem;
    align-items: start;
}

.runtime-stage-column {
    min-width: 0;
}

.runtime-frame {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    border: 1px solid #28486c;
    border-radius: 1rem;
    background: #030b18;
    box-shadow: 0 1rem 2.6rem rgb(7 19 38 / 22%);
}

.runtime-canvas {
    width: 100%;
    height: 100%;
    outline: none;
}

.runtime-canvas:focus-visible {
    box-shadow: inset 0 0 0 4px #55c2ff;
}

.runtime-canvas canvas {
    display: block;
}

.runtime-panel {
    border: 1px solid var(--runtime-border);
    border-radius: 1rem;
    background: var(--runtime-panel);
    box-shadow: 0 0.5rem 1.4rem rgb(16 33 58 / 7%);
}

.runtime-controls {
    margin-top: 1.25rem;
    padding: 1rem;
}

.runtime-control-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.runtime-control-group + .runtime-control-group {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--runtime-border);
}

.runtime-feedback {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-left: 4px solid var(--runtime-accent);
    border-radius: 0.35rem;
    background: color-mix(in srgb, var(--runtime-accent) 8%, transparent);
}

.runtime-feedback p {
    margin: 0;
}

.runtime-feedback p + p {
    margin-top: 0.35rem;
}

.runtime-essential-text {
    font-weight: 700;
}

.runtime-diagnostics {
    padding: 1.1rem;
}

.runtime-diagnostics h2 {
    margin: 0 0 1rem;
    font-size: 1.2rem;
}

.runtime-diagnostics h3 {
    margin: 1.25rem 0 0.7rem;
    font-size: 1rem;
}

.runtime-diagnostic-list {
    margin: 0;
}

.runtime-diagnostic-list div {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--runtime-border);
}

.runtime-diagnostic-list dt {
    color: var(--runtime-muted);
    font-weight: 600;
}

.runtime-diagnostic-list dd {
    margin: 0;
    font-weight: 700;
    text-align: right;
}

.runtime-capabilities {
    display: grid;
    gap: 0.4rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.runtime-capability {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 0.6rem;
    border-radius: 0.45rem;
    background: color-mix(in srgb, var(--runtime-muted) 9%, transparent);
    font-size: 0.86rem;
}

.runtime-capability.is-ok {
    border-left: 3px solid #198754;
}

.runtime-capability.is-missing {
    border-left: 3px solid #dc3545;
}

.runtime-privacy-note {
    margin: 1.2rem 0 0;
    color: var(--runtime-muted);
    font-size: 0.82rem;
    line-height: 1.45;
}

.runtime-overlay {
    position: fixed;
    z-index: 1100;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 1.25rem;
    background: rgb(3 11 24 / 78%);
    backdrop-filter: blur(5px);
}

.runtime-overlay[hidden] {
    display: none;
}

.runtime-overlay__card {
    width: min(32rem, 100%);
    padding: 1.6rem;
    border: 1px solid #8fd9ff;
    border-radius: 1rem;
    background: #ffffff;
    box-shadow: 0 1.25rem 4rem rgb(0 0 0 / 35%);
    color: #10213a;
    text-align: center;
}

.runtime-overlay__card h2 {
    margin-top: 0;
}

@media (max-width: 1180px) {
    .runtime-layout {
        grid-template-columns: 1fr;
    }

    .runtime-capabilities {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .runtime-heading {
        align-items: stretch;
        flex-direction: column;
    }

    .runtime-state-card {
        text-align: left;
    }

    .runtime-control-group {
        display: grid;
        grid-template-columns: 1fr;
    }

    .runtime-capabilities {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .runtime-overlay {
        backdrop-filter: none;
    }
}