.app-shell {
    display: grid;
    grid-template-columns: 252px minmax(0, 1fr);
    min-height: 100vh;
    background: var(--color-bg);
}

.sidebar {
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #FFFFFF;
    padding: 1.35rem;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 8px 0 28px rgba(0, 43, 85, 0.12);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.brand strong {
    display: block;
    letter-spacing: -0.02em;
}

.brand small {
    display: block;
    color: rgba(255, 255, 255, 0.76);
}

.brand-logo-wrap {
    width: 56px;
    height: 56px;
    flex: 0 0 56px;
    display: grid;
    place-items: center;
    background: #FFFFFF;
    border: 2px solid rgba(255, 204, 2, 0.75);
    border-radius: 50%;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
    overflow: hidden;
}

.brand-logo {
    width: 46px;
    height: 46px;
    display: block;
    object-fit: contain;
}

.brand-mark {
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    display: grid;
    place-items: center;
    background: #FFFFFF;
    color: var(--color-primary);
    border-radius: 50%;
    font-weight: 800;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.brand-mark.large {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-3);
    color: var(--color-primary);
}

.nav {
    display: grid;
    gap: 0.35rem;
}

.nav a {
    font-size: .9rem;
    padding: 0.68rem 0.8rem;
    text-decoration: none;
    border-radius: var(--radius-md);
    color: #FFFFFF;
    opacity: 0.9;
    border: 1px solid transparent;
    transition: background-color 0.18s ease, opacity 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.nav a:hover,
.nav a:focus-visible {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.18);
    opacity: 1;
    transform: translateX(2px);
}

.nav a.is-active,
.nav a[aria-current="page"] {
    background: var(--color-accent);
    border-color: rgba(255, 255, 255, 0.25);
    opacity: 1;
    font-weight: 700;
}

.main-area {
    min-width: 0;
}

.topbar {
    min-height: 64px;
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: 0 var(--space-5);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.topbar-title {
    flex: 1;
    min-width: 0;
}

.topbar-title strong {
    color: var(--color-text);
}

.content {
    padding: 1.75rem;
    max-width: 1440px;
    margin: 0 auto;
}

.guest-body {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: var(--space-5);
    background:
        radial-gradient(circle at 18% 16%, rgba(33, 170, 158, 0.12), transparent 30%),
        radial-gradient(circle at 82% 20%, rgba(255, 204, 2, 0.13), transparent 24%),
        linear-gradient(135deg, #EAF3FF 0%, #F8FBFF 100%);
}

.guest-shell {
    width: min(100%, 440px);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.page-header h1 {
    margin: 0 0 0.35rem;
    color: var(--color-text);
    letter-spacing: -0.03em;
}

.page-header p {
    margin: 0;
    color: var(--color-muted);
}

.student-movement-context {
    margin-bottom: var(--space-4);
    padding: var(--space-4);
}

.student-movement-context .section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.student-movement-context h2,
.student-movement-context p {
    margin: 0;
}

.student-movement-context h2 {
    color: var(--color-primary-dark);
}

.student-movement-context .page-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

@media (max-width: 620px) {
    .student-movement-context .section-heading,
    .student-movement-context .page-actions {
        display: grid;
        align-items: stretch;
    }

    .student-movement-context .button {
        width: 100%;
    }
}