/* Shell */
.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: var(--sp-16) var(--sp-12);
    border-right: 1px solid var(--c-border);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015));
}

.sidebar__brand {
    display: flex;
    align-items: center;
    gap: var(--sp-10);
    padding: 10px 10px;
    border-radius: 12px;
    border: 1px solid var(--c-border);
    background: rgba(255, 255, 255, 0.03);
    margin-bottom: var(--sp-16);
}

.sidebar__brand-title {
    font-weight: 800;
    letter-spacing: 0.3px;
}

.sidebar__nav {
    display: grid;
    gap: var(--sp-6);
}

.nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 10px;
    border-radius: 12px;
    border: 1px solid transparent;
    color: var(--c-muted);
}

.nav-item:hover {
    color: var(--c-text);
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--c-border);
}

/* Main area */
.main {
    min-width: 0;
    display: grid;
    grid-template-rows: var(--topbar-h) 1fr;
}

/* Topbar */
.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-16);
    padding: 0 var(--sp-20);
    border-bottom: 1px solid var(--c-border);
    background: rgba(11, 18, 32, 0.65);
    backdrop-filter: blur(10px);
}

.topbar__title {
    font-size: var(--fs-14);
    font-weight: 700;
    color: var(--c-text);
}

.topbar__meta {
    display: flex;
    align-items: center;
    gap: var(--sp-10);
    color: var(--c-muted);
    font-size: var(--fs-13);
}

/* Content container */
.page {
    padding: var(--sp-20);
}

.page__title {
    margin: 0 0 var(--sp-16) 0;
    font-size: var(--fs-18);
    letter-spacing: 0.2px;
}

/* Dashboard grid */
.dashboard-grid {
    display: grid;
    gap: var(--sp-16);
    grid-template-columns: 1fr 1fr;
    align-items: start;
}

@media (max-width: 980px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.dashboard-cell {
    min-width: 0;
}

.dashboard-cell--full {
    grid-column: 1 / -1;
}


/* Responsive: collapse sidebar */
@media (max-width: 980px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: relative;
        height: auto;
        border-right: 0;
        border-bottom: 1px solid var(--c-border);
    }

    .main {
        grid-template-rows: auto 1fr;
    }

    .topbar {
        position: relative;
    }
}