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

.app-main {
    flex: 1;
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 1030;
    border-bottom: 1px solid var(--app-border);
    background: rgba(15, 23, 42, 0.82);
    backdrop-filter: blur(18px);
}

.navbar-brand {
    color: var(--app-text);
    font-weight: 750;
    letter-spacing: -0.03em;
}

.navbar-brand::before {
    display: inline-block;
    width: 0.78rem;
    height: 0.78rem;
    margin-right: 0.55rem;
    content: "";
    border-radius: 999px;
    background: var(--app-primary);
    box-shadow: 0 0 0 0.28rem rgba(56, 189, 248, 0.12);
}

.navbar-toggler {
    border-color: var(--app-border);
    border-radius: 999px;
}

.app-container {
    width: 100%;
    max-width: var(--app-container-max);
    margin-inline: auto;
    padding-inline: var(--app-container-gutter);
}

/* Align Bootstrap's .container (navbar, footer, standalone pages) with the app
   container so every section shares the same edges and fluid side gutters. */
.container {
    max-width: var(--app-container-max);
    padding-inline: var(--app-container-gutter);
}