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

.app-header {
    background: var(--colour-surface);
    border-bottom: 1px solid var(--colour-border);
}

.app-header__inner,
.content-container {
    width: min(100% - (var(--content-padding) * 2), var(--content-width));
    margin-inline: auto;
}

.app-header__inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--colour-brand-dark);
    font-weight: 700;
    letter-spacing: 0.14em;
    text-decoration: none;
}

.brand img {
    width: 42px;
    height: 42px;
    object-fit: contain;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.primary-nav a,
.nav-button,
.contextual-help-trigger {
    color: var(--colour-brand);
    text-decoration: none;
    font-weight: 600;
}

.nav-form {
    margin: 0;
}

.nav-button {
    border: 0;
    background: transparent;
    cursor: pointer;
    padding: 0;
}

.main-content {
    flex: 1;
    padding-block: var(--space-7);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: var(--space-5);
    margin-bottom: calc(var(--space-7) + var(--space-2));
}

.page-header h1 {
    margin-bottom: var(--space-3);
}

.page-description {
    max-width: 760px;
    margin-bottom: 0;
    color: var(--colour-muted);
}

.eyebrow {
    margin-bottom: var(--space-2);
    color: var(--colour-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.section {
    margin-top: calc(var(--space-7) + var(--space-3));
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.section-heading h2 {
    margin-bottom: 0;
}

.card-grid {
    display: grid;
    gap: var(--space-5);
}

.card-grid--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
    gap: var(--space-5);
}

.app-footer {
    padding-block: var(--space-5);
    background: var(--colour-surface);
    border-top: 1px solid var(--colour-border);
    color: var(--colour-muted);
    font-size: 0.9rem;
}