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

.content-shell {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.page,
.site-footer {
    width: min(var(--content), calc(100% - 48px));
    min-width: 0;
    margin: 0 auto;
}

.page {
    flex: 1 0 auto;
    padding: 44px 0 80px;
    outline: none;
    transition: opacity .18s ease;
}

.page[aria-busy="true"] { opacity: .45; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid var(--c-border);
    background: rgba(15, 15, 15, .92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-nav);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    width: min(var(--content), calc(100% - 48px));
    margin: 0 auto;
    min-height: 68px;
}

.brand {
    display: flex;
    align-items: center;
    min-height: 44px;
    border: 2px solid var(--c-border);
    padding: 7px 14px;
    color: var(--c-text);
    background: var(--c-surface);
    flex-shrink: 0;
}

.brand:hover {
    border-color: var(--c-primary);
    color: var(--c-text);
    background: var(--c-surface-hot);
    text-decoration: none;
}

.brand-copy {
    display: flex;
    align-items: baseline;
    gap: 12px;
    min-width: 0;
}

.brand-copy strong {
    font-size: .98rem;
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: 0;
}

.brand-copy strong::first-letter { color: var(--c-primary); }

.brand-copy small {
    color: var(--c-text-muted);
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2px;
}

.primary-nav + .nav { display: none; }

.nav a {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    border: 1px solid transparent;
    padding: 0 15px;
    color: var(--c-text-secondary);
    font-size: .88rem;
    font-weight: 800;
    letter-spacing: 0;
}

.nav a:hover {
    border-color: var(--c-border);
    color: var(--c-text);
    background: var(--c-surface);
    text-decoration: none;
}

.nav a.active,
.nav a[aria-current="page"] {
    border-color: var(--c-primary);
    color: #fff;
    background: var(--c-primary);
    text-decoration: none;
}

.page-intro,
.site-page-head,
.form-page {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 310px);
    align-items: start;
    gap: 36px;
    margin: 0 0 36px;
    padding: 40px 0 38px;
    border-bottom: 2px solid var(--c-border);
}

.page-intro::after,
.site-page-head::after,
.form-page::after {
    content: "";
    display: block;
    grid-column: 1 / -1;
    width: 64px;
    height: 3px;
    margin-top: -20px;
    background: var(--c-primary);
}

.compact-intro {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
}

.site-page-head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
}

.form-page {
    grid-template-columns: minmax(220px, 310px) minmax(0, 1fr);
}

.form-aside {
    position: sticky;
    top: 96px;
    padding-top: 4px;
}

.site-footer {
    display: flex;
    flex-direction: column;
    flex: 0 0 auto;
    gap: 18px;
    border-top: 2px solid var(--c-border);
    padding: 28px 0 32px;
    color: var(--c-text-secondary);
    font-size: .86rem;
}

.footer-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-brand {
    display: grid;
    gap: 8px;
    max-width: 430px;
}

.footer-brand strong {
    color: var(--c-text);
    font-size: 1rem;
    font-weight: 900;
}

.footer-brand p {
    margin: 0;
    color: var(--c-text-secondary);
    font-size: .88rem;
    font-weight: 800;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    border: 1px solid var(--c-border);
    border-radius: 0;
    padding: 0 12px;
    color: var(--c-text-secondary);
    background: var(--c-surface);
    font-size: .82rem;
    font-weight: 900;
    white-space: nowrap;
}

.footer-links a:hover {
    border-color: var(--c-primary);
    color: #fff;
    background: var(--c-primary);
    text-decoration: none;
}

.footer-bottom {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 14px;
    justify-content: space-between;
    border-top: 1px solid var(--c-border);
    padding-top: 16px;
    color: var(--c-text-muted);
}

.footer-bottom span {
    color: var(--c-text-secondary);
    font-size: .8rem;
    font-weight: 800;
    line-height: 1.45;
}