/* Diskanban — App shell: sidebar + topbar + main */
.app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    height: 100vh;
    overflow: hidden;
}
.sidebar {
    background: var(--color-surface-1);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--sp-3) 0;
    gap: var(--sp-1);
    overflow-y: auto;
}
.sidebar-logo {
    width: 36px; height: 36px;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-family: var(--font-display);
    font-weight: 700; font-size: 18px;
    margin-bottom: var(--sp-3);
    box-shadow: 0 4px 12px rgba(50, 152, 186, 0.35);
}
.sidebar-divider {
    width: 28px; height: 1px;
    background: var(--color-border);
    margin: var(--sp-2) 0;
}
.sidebar-link {
    width: 40px; height: 40px;
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-text-muted);
    background: transparent;
    border: 0;
    transition: all var(--t-fast) var(--ease-out);
    position: relative;
    cursor: pointer;
}
.sidebar-link:hover { background: var(--color-surface-2); color: var(--color-text-primary); }
.sidebar-link.active { background: var(--color-primary-soft); color: var(--color-primary); }
.sidebar-link svg { width: 20px; height: 20px; stroke-width: 1.7; }
.sidebar-server {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--color-surface-2);
    border: 0;
    color: var(--color-text-primary);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--fs-md);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: border-radius var(--t-fast) var(--ease-out);
    overflow: hidden;
}
.sidebar-server:hover { border-radius: var(--radius-md); background: var(--color-primary); }
.sidebar-server.active { border-radius: var(--radius-md); background: var(--color-primary); color: #fff; }
.sidebar-server img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-bottom { margin-top: auto; display: flex; flex-direction: column; gap: var(--sp-1); align-items: center; }

.main {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--color-bg-base);
}
.topbar {
    height: var(--topbar-h);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--sp-5);
    gap: var(--sp-4);
    background: var(--color-bg-base);
    flex-shrink: 0;
}
.topbar h1 {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}
.breadcrumb {
    color: var(--color-text-muted);
    font-size: var(--fs-sm);
    display: flex;
    align-items: center;
    gap: var(--sp-2);
}
.breadcrumb-sep { color: var(--color-text-faint); }
.breadcrumb-link { color: var(--color-text-muted); cursor: pointer; }
.breadcrumb-link:hover { color: var(--color-text-primary); }
.topbar-spacer { flex: 1; }
.topbar-search {
    position: relative;
    width: 280px;
}
.topbar-search input {
    width: 100%;
    height: 32px;
    padding: 0 var(--sp-3) 0 32px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: var(--fs-sm);
    outline: none;
    transition: border-color var(--t-fast);
}
.topbar-search input:focus { border-color: var(--color-primary); }
.topbar-search svg {
    position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
    width: 14px; height: 14px; color: var(--color-text-faint);
}
.view {
    flex: 1;
    overflow: auto;
    padding: var(--sp-5);
    animation: fadeIn 220ms var(--ease-out);
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

@media (max-width: 1024px) {
    .app-shell { grid-template-columns: 56px 1fr; }
    :root { --sidebar-w: 56px; --drawer-w: 100%; }
    .topbar-search { width: 200px; }
}