:root {
    --nexus-bg: #F8FAFC;
    --nexus-panel: #FFFFFF;
    --nexus-border: #E2E8F0;
    --nexus-accent: #2563EB;
    --nexus-accent-dark: #1D4ED8;
    --nexus-accent-soft: #DBEAFE;
    --nexus-sidebar: #1E293B;
    --nexus-sidebar-soft: #334155;
    --nexus-ink: #1E293B;
    --nexus-muted: #64748B;
}

body,
.content-wrapper,
.nexus-auth-page {
    background: var(--nexus-bg) !important;
    color: var(--nexus-ink);
}

a {
    color: var(--nexus-accent);
}

a:hover {
    color: var(--nexus-accent-dark);
}

.main-header {
    background: var(--nexus-panel);
    border-bottom-color: var(--nexus-border);
}

.main-sidebar {
    background: var(--nexus-sidebar);
}

.brand-link {
    background: var(--nexus-sidebar);
    border-bottom-color: rgba(255, 255, 255, .08) !important;
    min-height: 57px;
}

.brand-link .brand-text {
    color: #F8FAFC;
    font-weight: 650 !important;
    letter-spacing: 0;
}

.content-header h1 {
    font-size: 1.55rem;
    font-weight: 650;
}

.card,
.modal-content,
.small-box {
    border-radius: 8px;
}

.card {
    border: 1px solid var(--nexus-border);
    background: var(--nexus-panel);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
}

.card-header {
    background: rgba(248, 250, 252, .82);
    border-bottom-color: var(--nexus-border);
}

.card-title {
    color: var(--nexus-ink);
    font-weight: 650;
}

.btn {
    border-radius: 6px;
}

.form-control {
    border-color: #CBD5E1;
}

.form-control:focus {
    border-color: var(--nexus-accent);
    box-shadow: 0 0 0 .2rem rgba(37, 99, 235, .15);
}

.btn-primary,
.page-item.active .page-link {
    background-color: var(--nexus-accent);
    border-color: var(--nexus-accent);
}

.btn-primary:hover {
    background-color: var(--nexus-accent-dark);
    border-color: var(--nexus-accent-dark);
}

.btn-outline-primary {
    color: var(--nexus-accent);
    border-color: var(--nexus-accent);
}

.btn-outline-primary:hover {
    background-color: var(--nexus-accent);
    border-color: var(--nexus-accent);
}

.btn-outline-success {
    color: var(--nexus-sidebar);
    border-color: #94A3B8;
}

.btn-outline-success:hover {
    background-color: var(--nexus-sidebar);
    border-color: var(--nexus-sidebar);
}

.nav-sidebar .nav-link {
    border-radius: 6px;
}

.sidebar-dark-primary .nav-sidebar > .nav-item > .nav-link.active,
.sidebar-light-primary .nav-sidebar > .nav-item > .nav-link.active {
    background: var(--nexus-accent);
    color: #fff;
    box-shadow: none;
}

.sidebar-dark-primary .nav-sidebar > .nav-item > .nav-link:not(.active):hover {
    background: var(--nexus-sidebar-soft);
}

.sidebar .user-panel {
    border-bottom-color: rgba(255, 255, 255, .08);
}

.sidebar .user-panel .info a {
    color: #F8FAFC;
}

.sidebar .user-panel .text-muted {
    color: #CBD5E1 !important;
}

.avatar-circle {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--nexus-accent);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.nexus-login-box .card {
    border-top: 3px solid var(--nexus-accent);
}

.login-logo a {
    color: var(--nexus-sidebar);
}

.small-box {
    box-shadow: 0 10px 22px rgba(15, 23, 42, .08);
}

.small-box.bg-info {
    background: var(--nexus-accent) !important;
}

.small-box.bg-success {
    background: var(--nexus-sidebar) !important;
}

.small-box.bg-secondary {
    background: #475569 !important;
}

.small-box .icon {
    opacity: .28;
}

.nexus-info-box {
    border: 1px solid var(--nexus-border);
    border-radius: 8px;
    background: var(--nexus-panel);
    box-shadow: 0 8px 18px rgba(15, 23, 42, .05);
}

.nexus-info-box .info-box-icon {
    background: var(--nexus-accent-soft);
    color: var(--nexus-accent);
    border-radius: 8px 0 0 8px;
}

.nexus-info-box .info-box-text {
    color: var(--nexus-muted);
}

.nexus-highlight-card {
    border-left: 4px solid var(--nexus-accent);
}

.file-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    justify-content: flex-end;
}

.file-icon {
    width: 30px;
    text-align: center;
    color: var(--nexus-accent);
}

.table td,
.table th {
    vertical-align: middle;
}

.table thead th {
    border-bottom-color: var(--nexus-border);
    color: var(--nexus-muted);
    font-size: .78rem;
    letter-spacing: 0;
    text-transform: uppercase;
}

.table-hover tbody tr:hover {
    background: #F1F5F9;
}

.breadcrumb-folder {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    align-items: center;
}

.backup-code-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: .5rem;
}

.backup-code {
    border: 1px dashed #93C5FD;
    border-radius: 6px;
    padding: .65rem;
    background: #EFF6FF;
    color: var(--nexus-sidebar);
    font-family: Consolas, Monaco, monospace;
    text-align: center;
    font-weight: 700;
}

#qrcode {
    width: 258px;
    min-height: 258px;
    padding: 16px;
    background: #fff;
    border: 1px solid #CBD5E1;
    border-radius: 8px;
    box-shadow: inset 0 0 0 1px #fff, 0 10px 24px rgba(15, 23, 42, .08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

#qrcode img,
#qrcode canvas {
    display: block;
}

.qr-fallback {
    color: var(--nexus-muted);
    font-size: .875rem;
}

.security-status {
    display: flex;
    gap: .65rem;
    align-items: center;
    border-radius: 8px;
    padding: .85rem 1rem;
    border: 1px solid var(--nexus-border);
    background: #EFF6FF;
    color: var(--nexus-sidebar);
}

.security-status.success {
    background: #DBEAFE;
    color: #1E40AF;
    border-color: #93C5FD;
}

.security-status.muted {
    background: #F1F5F9;
    color: var(--nexus-muted);
}

.empty-state {
    padding: 3rem 1rem;
    text-align: center;
    color: var(--nexus-muted);
}