:root {
    --hub-primary: #2563eb;
    --hub-navy: #1a237e;
    --hub-bg: #f4f7fb;
    --hub-text: #111827;
    --hub-muted: #6b7280;
    --hub-border: #e5e7eb;
    --hub-college: #1d4ed8;
    --hub-staff: #0d6e6e;
    --hub-student: #7c3aed;
}

* {
    box-sizing: border-box;
}

.login-hub-body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: linear-gradient(165deg, #eef2ff 0%, var(--hub-bg) 45%, #fff 100%);
    color: var(--hub-text);
    -webkit-font-smoothing: antialiased;
}

.login-hub-page {
    max-width: 440px;
    margin: 0 auto;
    padding: max(20px, env(safe-area-inset-top)) 20px max(24px, env(safe-area-inset-bottom));
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

.login-hub-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-hub-logo {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: contain;
    background: #fff;
    padding: 4px;
    box-shadow: 0 4px 20px rgba(26, 35, 126, 0.12);
    margin-bottom: 12px;
}

.login-hub-title {
    margin: 0 0 6px;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--hub-navy);
    letter-spacing: -0.02em;
}

.login-hub-sub {
    margin: 0;
    font-size: 0.95rem;
    color: var(--hub-muted);
}

.login-hub-session {
    font-size: 0.88rem;
    margin-bottom: 16px;
    border-radius: 12px;
}

.login-hub-portals {
    display: flex;
    flex-direction: column;
    gap: 14px;
    flex: 1;
}

.login-hub-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 18px 18px 16px;
    min-height: 72px;
    background: #fff;
    border: 1px solid var(--hub-border);
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    -webkit-tap-highlight-color: transparent;
}

.login-hub-card:active {
    transform: scale(0.98);
}

.login-hub-card:focus-visible {
    outline: 3px solid var(--hub-primary);
    outline-offset: 2px;
}

.login-hub-card-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
}

.login-hub-card--college .login-hub-card-icon {
    background: linear-gradient(135deg, var(--hub-college), var(--hub-navy));
}

.login-hub-card--staff .login-hub-card-icon {
    background: linear-gradient(135deg, var(--hub-staff), #065f5f);
}

.login-hub-card--student .login-hub-card-icon {
    background: linear-gradient(135deg, var(--hub-student), #5b21b6);
}

.login-hub-card-text {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.login-hub-card-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--hub-text);
}

.login-hub-card-sub {
    font-size: 0.82rem;
    color: var(--hub-muted);
    line-height: 1.35;
}

.login-hub-card-arrow {
    flex-shrink: 0;
    font-size: 1.25rem;
    color: #cbd5e1;
}

.login-hub-card--college:hover,
.login-hub-card--college:focus-visible {
    border-color: rgba(29, 78, 216, 0.35);
}

.login-hub-card--staff:hover,
.login-hub-card--staff:focus-visible {
    border-color: rgba(13, 110, 110, 0.35);
}

.login-hub-card--student:hover,
.login-hub-card--student:focus-visible {
    border-color: rgba(124, 58, 237, 0.35);
}

@media (hover: hover) {
    .login-hub-card:hover {
        box-shadow: 0 8px 28px rgba(15, 23, 42, 0.1);
        transform: translateY(-1px);
    }
}

.login-hub-share {
    margin-top: 24px;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--hub-border);
    border-radius: 14px;
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05);
}

.login-hub-share-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--hub-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 10px;
}

.login-hub-share-row {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

.login-hub-share-input {
    flex: 1;
    min-width: 0;
    border: 1px solid var(--hub-border);
    border-radius: 10px;
    padding: 12px 12px;
    font-size: 0.82rem;
    color: var(--hub-text);
    background: #f8fafc;
}

.login-hub-share-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 16px;
    border: none;
    border-radius: 10px;
    background: var(--hub-navy);
    color: #fff;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    min-height: 44px;
}

.login-hub-share-btn:hover {
    background: var(--hub-primary);
}

.login-hub-share-btn.is-copied {
    background: #059669;
}

.login-hub-hint {
    margin: 12px 0 0;
    font-size: 0.8rem;
    color: #94a3b8;
    text-align: center;
    line-height: 1.45;
}

.login-hub-hint i {
    margin-right: 4px;
}

.login-hub-colleges-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    margin-top: 16px;
    padding: 16px 18px;
    min-height: 64px;
    background: #fff;
    border: 2px solid #bfdbfe;
    border-radius: 14px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.login-hub-colleges-btn:hover {
    border-color: var(--hub-primary);
    background: #eff6ff;
    color: inherit;
}

.login-hub-colleges-btn > .bi-mortarboard {
    flex-shrink: 0;
    font-size: 1.5rem;
    color: var(--hub-primary);
}

.login-hub-home {
    margin-top: 12px;
}

.login-hub-home-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 16px 18px;
    min-height: 64px;
    background: #fff;
    border: 2px dashed #c7d2fe;
    border-radius: 14px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.login-hub-home-btn:hover {
    border-color: var(--hub-primary);
    background: #f8fafc;
    color: inherit;
}

.login-hub-home-btn > .bi-house-door {
    flex-shrink: 0;
    font-size: 1.5rem;
    color: var(--hub-primary);
}

.login-hub-home-text {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-align: left;
}

.login-hub-home-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--hub-text);
}

.login-hub-home-url {
    font-size: 0.82rem;
    color: var(--hub-muted);
    word-break: break-all;
}

.login-hub-home-arrow {
    flex-shrink: 0;
    font-size: 1.1rem;
    color: #94a3b8;
}

.login-hub-footer {
    margin-top: auto;
    padding-top: 28px;
    text-align: center;
    font-size: 0.75rem;
    color: #94a3b8;
}