/* ══════════════════════════════════════════════
   LAYOUT — shell, topbar, page-content, page-header, empty-state
══════════════════════════════════════════════ */

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

/* ── Topbar ── */
.topbar {
    height: 56px;
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: -0.01em;
    color: var(--ink);
    text-decoration: none;
    margin-right: 8px;
}

.topbar-brand-mark {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 800;
}

.topbar-sep {
    width: 1px;
    height: 22px;
    background: var(--line-strong);
    margin: 0 4px;
    flex-shrink: 0;
}

.topbar-spacer {
    flex: 1;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Page content ── */
.page-content {
    flex: 1;
    padding: 32px 28px;
    max-width: 1260px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* ── Page header ── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.page-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--ink);
}

.page-subtitle {
    font-size: 13px;
    color: var(--ink-3);
    margin-top: 2px;
}

.page-actions {
    display: flex;
    gap: 8px;
}

/* ── Empty state ── */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 60px 20px;
    color: var(--ink-3);
    text-align: center;
}

.empty-state svg {
    opacity: 0.25;
}

.empty-state p {
    font-size: 13px;
}