/* ═══════════════════════════════════════════════════════════
   Feedback — extracted from TNonline (app.css / FilterBar)
   Spinner, loading container, empty state, and the filter bar
   layout wrapper.
   ═══════════════════════════════════════════════════════════ */

/* ── Spinner ── */
@keyframes tn-spin {
    to { transform: rotate(360deg); }
}

.tn-spinner {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--tn-border);
    border-top-color: var(--tn-accent);
    border-radius: 50%;
    animation: tn-spin 0.6s linear infinite;
}

.tn-spinner--sm {
    width: 1rem;
    height: 1rem;
}

/* ── Loading container ── */
.tn-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--tn-space-md);
    min-height: 300px;
    color: var(--tn-text-secondary);
    font-size: var(--tn-font-size-sm);
}

.tn-loading p {
    margin: 0;
}

/* ── Empty state ── */
.tn-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--tn-space-sm);
    padding: var(--tn-space-xl) var(--tn-space-md);
    color: var(--tn-text-muted);
    text-align: center;
}

.tn-empty .bi {
    font-size: 2rem;
    opacity: 0.5;
}

.tn-empty p {
    margin: 0;
    font-size: var(--tn-font-size-sm);
}

/* ── Filter bar ── */
.tn-filter-bar {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--tn-space-md);
    padding: var(--tn-space-md) var(--tn-space-lg);
    margin-bottom: var(--tn-space-lg);
    background: var(--tn-bg-card);
    border: 1px solid var(--tn-border);
    border-radius: var(--tn-radius-lg);
    flex-wrap: wrap;
}

.tn-filter-bar-fields {
    display: flex;
    align-items: flex-end;
    gap: var(--tn-space-md);
    flex-wrap: wrap;
}

.tn-filter-bar-extra {
    display: flex;
    align-items: flex-end;
    gap: var(--tn-space-sm);
}

@media (max-width: 768px) {
    .tn-filter-bar,
    .tn-filter-bar-fields {
        flex-direction: column;
        align-items: stretch;
    }

    .tn-filter-bar-extra {
        width: 100%;
    }
}

/* ── Page header (title + subtitle) ── */
.tn-page-header {
    margin-bottom: var(--tn-space-lg);
}

.tn-page-title {
    /* fluid: scales between 2xl and 3xl with viewport width */
    font-size: clamp(var(--tn-font-size-2xl), 1.2rem + 1vw, var(--tn-font-size-3xl));
    font-weight: 700;
    color: var(--tn-text-primary);
    line-height: 1.3;
    margin: 0;
    letter-spacing: -0.02em;
}

.tn-page-subtitle {
    margin: 4px 0 0;
    font-size: var(--tn-font-size-sm);
    color: var(--tn-text-secondary);
}