.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-shell-header {
    position: sticky;
    top: 0;
    z-index: 40;
    padding: 0.9rem 1rem 0;
}

.app-shell-bar {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-default);
    border-radius: 24px;
    background: color-mix(in srgb, var(--bg-elevated) 78%, transparent);
    box-shadow: var(--shadow-1);
    backdrop-filter: blur(18px);
}

.app-shell-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    color: inherit;
    text-decoration: none;
}

.app-shell-brand:hover {
    color: inherit;
}

.app-shell-brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 18px;
    background: linear-gradient(145deg, var(--accent-3), var(--accent-5));
    color: var(--text-on-accent);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.app-shell-brand-copy {
    display: grid;
    gap: 0.1rem;
}

.app-shell-brand-copy strong {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.1;
}

.app-shell-brand-copy span {
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.app-shell-header-nav {
    min-width: 0;
}

.app-shell-header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    min-height: 2.75rem;
}

.app-shell-main {
    flex: 1 1 auto;
    min-width: 0;
    padding: 1rem 0 5.75rem;
}

.content-shell {
    width: min(1600px, 100%);
    margin: 0 auto;
    padding: 0 1rem;
    box-sizing: border-box;
}

.app-shell-mobile-nav {
    position: sticky;
    bottom: 0;
    z-index: 35;
    padding: 0 0.75rem 0.75rem;
    margin-top: auto;
}

@media (max-width: 767.98px) {
    .app-shell-header {
        padding: 0.65rem 0.75rem 0;
    }

    .app-shell-bar {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 0.75rem;
        padding: 0.7rem 0.85rem;
    }

    .app-shell-brand-copy span {
        display: none;
    }

    .app-shell-header-nav {
        display: none;
    }
}

@media (min-width: 768px) {
    .app-shell-main {
        padding-bottom: 1.25rem;
    }

    .app-shell-mobile-nav {
        display: none;
    }
}
