:root {
    --navy-900: #021127;
    --navy-800: #03244e;
    --navy-700: #021c63;
    --navy-600: #0339cc;
    --navy-400: #3b82f6;
    --navy-200: #bfdbfe;
    --navy-100: #dbeafe;
    --navy-50: #eff6ff;
    --text-dark: #1e3a5f;
    --text-mid: #3b82f6;
    --text-soft: #64748b;
    --bg-page: #eff6ff;
    --bg-white: #ffffff;
    --border: #bfdbfe;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg-page);
    font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
    color: var(--text-dark);
}

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

/* ── Body phải sidebar ── */
.app-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--bg-page);
}

/* ── Topbar ── */
.app-topbar {
    height: 58px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 28px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-shrink: 0;

}

.app-topbar__title {
    flex: 1;
    font-size: 1rem;
    font-weight: 700;
    color: var(--navy-800);
    letter-spacing: 0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.app-topbar__right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* ── Content ── */
.app-content {
    flex: 1;
    padding: 0 28px 28px 28px;
}

/* ── Footer ── */
.app-footer {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 4px;
    padding: 14px 28px;
    font-size: 0.78rem;
    color: var(--text-soft);
    border-top: 1px solid var(--border);
    background: var(--bg-white);
    border-radius: 26px;
}

/* ── Mobile ── */
@media (max-width: 767.98px) {
    .app-topbar {
        padding: 0 16px 0 62px;
    }

    .app-topbar__title {
        font-size: 0.88rem;
    }

    .app-content {
        padding: 16px;
    }

    .app-footer {
        flex-direction: column;
        text-align: center;
        align-items: center;
        padding: 12px 16px;
    }
}