/* Shared VATSE admin foundation. Vertical layouts provide only brand tokens. */
.vatse-app-shell {
    --vt-space-1: .25rem;
    --vt-space-2: .5rem;
    --vt-space-3: .75rem;
    --vt-space-4: 1rem;
    --vt-space-6: 1.5rem;
    --vt-space-8: 2rem;
    --vt-radius-sm: .5rem;
    --vt-radius-md: .75rem;
    --vt-radius-lg: 1rem;
    --vt-duration-fast: 140ms;
    --vt-duration-normal: 220ms;
    --vt-ease-standard: cubic-bezier(.2, .8, .2, 1);
}

.vatse-app-shell :focus-visible {
    outline: 3px solid color-mix(in srgb, var(--adm-primary) 55%, transparent);
    outline-offset: 2px;
}

.vatse-app-shell .vt-page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--vt-space-4);
    margin-bottom: var(--vt-space-6);
}

.vatse-app-shell .vt-page-header__eyebrow {
    margin: 0 0 var(--vt-space-1);
    color: var(--adm-primary);
    font-size: 0.80rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.vatse-app-shell .vt-page-header__title { margin: 0; color: var(--adm-text); font-size: clamp(1.25rem, 2vw, 1.75rem); line-height: 1.15; }
.vatse-app-shell .vt-page-header__description { margin: var(--vt-space-2) 0 0; color: var(--adm-text-muted); font-size: .875rem; max-width: 65ch; }
.vatse-app-shell .vt-page-header__actions { display: flex; flex-wrap: wrap; gap: var(--vt-space-2); }

.vatse-app-shell .vt-button {
    align-items: center; border: 1px solid transparent; border-radius: var(--vt-radius-md); cursor: pointer;
    display: inline-flex; font: inherit; font-size: .875rem; font-weight: 700; gap: .5rem; justify-content: center;
    min-height: 44px; padding: .625rem 1rem; text-decoration: none; transition: background var(--vt-duration-fast) var(--vt-ease-standard), border-color var(--vt-duration-fast) var(--vt-ease-standard), color var(--vt-duration-fast) var(--vt-ease-standard);
}
.vatse-app-shell .vt-button--primary { background: var(--adm-primary); color: #fff; }
.vatse-app-shell .vt-button--primary:hover { background: var(--adm-primary-hover); color: #fff; }
.vatse-app-shell .vt-button--secondary { background: var(--adm-surface); border-color: var(--adm-border); color: var(--adm-text); }
.vatse-app-shell .vt-button--secondary:hover { background: var(--adm-surface-hover); border-color: var(--adm-primary); color: var(--adm-primary); }
.vatse-app-shell .vt-button--inverse { background: rgba(255, 255, 255, .2); border-color: rgba(255, 255, 255, .16); color: #fff; }
.vatse-app-shell .vt-button--inverse:hover { background: rgba(255, 255, 255, .3); color: #fff; }
.vatse-app-shell .vt-button--inverse-subtle { background: rgba(255, 255, 255, .13); border-color: rgba(255, 255, 255, .12); color: #fff; }
.vatse-app-shell .vt-button--inverse-subtle:hover { background: rgba(255, 255, 255, .24); color: #fff; }

.vatse-app-shell .vt-empty-state { border: 1px dashed var(--adm-border); border-radius: var(--vt-radius-lg); color: var(--adm-text-muted); padding: var(--vt-space-8); text-align: center; }
.vatse-app-shell .vt-empty-state__icon { color: var(--adm-primary); font-size: 1.5rem; margin-bottom: var(--vt-space-3); }

@media (max-width: 640px) {
    .vatse-app-shell .vt-page-header { align-items: flex-start; flex-direction: column; }
    .vatse-app-shell .vt-page-header__actions { width: 100%; }
    .vatse-app-shell .vt-page-header__actions > * { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
    .vatse-app-shell *, .vatse-app-shell *::before, .vatse-app-shell *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}