/* ============================================
   Layout — Navbar, Page Container, Grids
   ============================================ */

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
}

.navbar-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
}

.navbar-brand {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-text);
    letter-spacing: -0.3px;
}

.navbar-brand:hover {
    color: var(--color-primary);
}

/* Page Container */
.page-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-lg);
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-md);
}

/* Auth Page */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--navbar-height) - 80px);
}

.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 900px) {
    .navbar-inner {
        padding: 0 var(--space-md);
    }
    .navbar-brand {
        font-size: var(--text-md);
    }
    .page-container {
        padding: var(--space-md);
    }
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-sm);
    }
}

@media (max-width: 400px) {
    .navbar-inner {
        height: 48px;
    }
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xs);
    }
}