:root {
    --app-panel-primary: #13304a;
    --app-panel-text: #1b2733;
    --app-panel-muted: #5b6b7c;
    --app-panel-border: #e3e8ee;
    --app-panel-surface: #ffffff;
    --app-panel-soft: #f6f8fa;
    --app-panel-danger: #9b2416;
    --app-panel-danger-soft: #fde2df;
    --app-panel-backdrop: rgba(19, 48, 74, 0.35);
    --app-panel-shadow: -12px 0 32px rgba(19, 48, 74, 0.18);
}

body.app-panel-open {
    overflow: hidden;
}

.app-panel-layer {
    position: fixed;
    inset: 0;
    display: flex;
    pointer-events: none;
}

.app-panel-backdrop {
    position: absolute;
    inset: 0;
    background: var(--app-panel-backdrop);
    opacity: 0;
    transition: opacity .2s ease;
    pointer-events: auto;
}

.app-panel {
    position: relative;
    display: flex;
    flex-direction: column;
    max-width: 100%;
    background: var(--app-panel-surface);
    color: var(--app-panel-text);
    box-shadow: var(--app-panel-shadow);
    pointer-events: auto;
    outline: none;
    transition: transform .2s ease, opacity .2s ease, width .25s ease;
}

.app-panel-layer.is-open .app-panel-backdrop {
    opacity: 1;
}

.app-panel--drawer.app-panel--right {
    justify-content: flex-end;
}

.app-panel--drawer.app-panel--left {
    justify-content: flex-start;
}

.app-panel--drawer .app-panel {
    height: 100%;
    transform: translateX(100%);
}

.app-panel--drawer.app-panel--left .app-panel {
    transform: translateX(-100%);
}

.app-panel--drawer.is-open .app-panel {
    transform: translateX(0);
}

.app-panel--modal {
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
}

.app-panel--modal .app-panel {
    max-height: calc(100vh - 48px);
    border-radius: 12px;
    opacity: 0;
    transform: translateY(12px) scale(.98);
}

.app-panel--modal.is-open .app-panel {
    opacity: 1;
    transform: none;
}

.app-panel--sm .app-panel { width: 420px; }
.app-panel--md .app-panel { width: 600px; }
.app-panel--lg .app-panel { width: 840px; }
.app-panel--xl .app-panel { width: 1140px; }
.app-panel--full .app-panel { width: 100%; }
.app-panel--modal.app-panel--full .app-panel { height: calc(100vh - 48px); }

.app-panel-header {
    flex: 0 0 auto;
    padding: 18px 24px 14px;
    border-bottom: 1px solid var(--app-panel-border);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.app-panel-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.app-panel-titles {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.app-panel-eyebrow {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--app-panel-muted);
}

.app-panel-title {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
    color: var(--app-panel-primary);
    font-variant-numeric: tabular-nums;
}

.app-panel-close {
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #3d4b59;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-panel-close:hover,
.app-panel-close:focus-visible {
    background: #e6edf5;
}

.app-panel-close:disabled {
    opacity: .4;
    cursor: not-allowed;
}

.app-panel-body {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 20px 24px;
}

.app-panel-footer {
    flex: 0 0 auto;
    padding: 14px 24px;
    border-top: 1px solid var(--app-panel-border);
    background: var(--app-panel-surface);
}

.app-panel--modal .app-panel-footer {
    border-radius: 0 0 12px 12px;
}

.app-panel.is-loading [data-panel-slot] {
    display: none !important;
}

.app-panel-content[hidden] {
    display: none;
}

.app-panel-loading {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 24px 0;
    color: var(--app-panel-muted);
}

.app-panel-error {
    padding: 12px 14px;
    border-radius: 8px;
    background: var(--app-panel-danger-soft);
    color: var(--app-panel-danger);
    font-weight: 600;
}

.app-panel-busy {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, .6);
    color: var(--app-panel-primary);
    z-index: 2;
}

.app-panel-busy[hidden] {
    display: none;
}

@media (max-width: 640px) {
    .app-panel-layer .app-panel {
        width: 100%;
    }

    .app-panel--modal {
        padding: 0;
    }

    .app-panel--modal .app-panel {
        height: 100%;
        max-height: 100%;
        border-radius: 0;
    }

    .app-panel-header,
    .app-panel-body,
    .app-panel-footer {
        padding-left: 16px;
        padding-right: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .app-panel,
    .app-panel-backdrop {
        transition: none;
    }
}