:root,
[data-bs-theme="light"] {
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-text-active: #ffffff;
    --sidebar-hover: rgba(255, 255, 255, 0.08);
    --sidebar-active: rgba(59, 130, 246, 0.25);
    --sidebar-border: rgba(255, 255, 255, 0.08);
    --main-bg: #f1f5f9;
    --topbar-bg: #ffffff;
    --topbar-border: #e2e8f0;
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --card-bg: #ffffff;
    --card-header-bg: #f8fafc;
    --card-header-border: #e2e8f0;
    --card-footer-bg: #f8fafc;
}

[data-bs-theme="dark"] {
    --sidebar-bg: #0f172a;
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #f1f5f9;
    --sidebar-hover: rgba(255, 255, 255, 0.06);
    --sidebar-active: rgba(59, 130, 246, 0.3);
    --sidebar-border: rgba(255, 255, 255, 0.06);
    --main-bg: #0b1120;
    --topbar-bg: #111827;
    --topbar-border: #1f2937;
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    --card-bg: #111827;
    --card-header-bg: #1f2937;
    --card-header-border: #374151;
    --card-footer-bg: #1f2937;
}

body {
    background-color: var(--main-bg);
    min-height: 100vh;
}

.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    min-width: 260px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1040;
    transition: transform 0.25s ease;
}

.sidebar-brand {
    padding: 1.25rem 1.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--sidebar-text-active);
    text-decoration: none;
    border-bottom: 1px solid var(--sidebar-border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-brand:hover {
    color: var(--sidebar-text-active);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0.75rem;
}

.sidebar-nav .nav-link {
    color: var(--sidebar-text);
    padding: 0.65rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 0.15rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.925rem;
    transition: background 0.15s, color 0.15s;
}

.sidebar-nav .nav-link:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

.sidebar-nav .nav-link.active {
    background: var(--sidebar-active);
    color: var(--sidebar-text-active);
    font-weight: 500;
}

.sidebar-nav .nav-link i {
    font-size: 1.1rem;
    width: 1.25rem;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--sidebar-border);
}

.sidebar-user {
    font-size: 0.85rem;
    color: var(--sidebar-text);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.topbar {
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--topbar-border);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.content-area {
    flex: 1;
    padding: 1.5rem;
}

.guest-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.guest-topbar {
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--topbar-border);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.guest-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.card {
    border: none;
    box-shadow: var(--card-shadow);
    background-color: var(--card-bg);
}

.card-header.bg-white,
.card-header:not([class*="bg-primary"]):not([class*="bg-dark"]):not([class*="bg-success"]):not([class*="bg-danger"]):not([class*="bg-warning"]):not([class*="bg-info"]) {
    background-color: var(--card-header-bg) !important;
    border-bottom: 1px solid var(--card-header-border);
    color: var(--bs-body-color);
}

.card-footer.bg-white {
    background-color: var(--card-footer-bg) !important;
    border-top: 1px solid var(--card-header-border);
    color: var(--bs-body-color);
}

.card-header.bg-white .text-muted,
.card-header .text-muted {
    color: var(--bs-secondary-color) !important;
}

.card-header.bg-white h5,
.card-header.bg-white h4,
.card-header.bg-white h6 {
    color: var(--bs-body-color);
}

.table th {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.fingerprint {
    font-family: monospace;
    font-size: 0.85rem;
}

.license-key {
    font-family: monospace;
    font-size: 0.8rem;
    word-break: break-all;
}

.theme-toggle-btn {
    border: 1px solid var(--topbar-border);
    background: transparent;
    color: inherit;
    border-radius: 0.5rem;
    padding: 0.35rem 0.65rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.875rem;
}

.theme-toggle-btn:hover {
    opacity: 0.85;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1035;
}

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .sidebar-overlay.show {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }
}