:root {
    --os2-navy-950: #0b1120;
    --os2-navy-900: #172554;
    --os2-navy-800: #1e3a8a;
    --os2-blue-600: #2563eb;
    --os2-blue-100: #dbeafe;
    --os2-slate-950: #0f172a;
    --os2-slate-700: #334155;
    --os2-slate-500: #64748b;
    --os2-slate-300: #cbd5e1;
    --os2-slate-200: #e2e8f0;
    --os2-slate-100: #f1f5f9;
    --os2-slate-50: #f8fafc;
    --os2-success: #15803d;
    --os2-warning: #b45309;
    --os2-danger: #b91c1c;
    --os2-sidebar-width: 264px;
    --os2-topbar-height: 64px;
    --os2-radius: 0.8rem;
    --os2-shadow: 0 12px 30px rgb(15 23 42 / 8%);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--os2-slate-50);
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--os2-slate-950);
    background: var(--os2-slate-50);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
    text-underline-offset: 0.15em;
}

.app-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 1040;
    display: flex;
    width: var(--os2-sidebar-width);
    flex-direction: column;
    color: #fff;
    background: linear-gradient(180deg, var(--os2-navy-950), var(--os2-navy-900));
    transition: transform 180ms ease;
}

.app-brand {
    display: flex;
    flex: 0 0 auto;
    min-height: var(--os2-topbar-height);
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid rgb(255 255 255 / 10%);
}

.app-brand-mark {
    display: grid;
    width: 2.25rem;
    height: 2.25rem;
    place-items: center;
    border-radius: 0.65rem;
    color: var(--os2-navy-950);
    background: #fff;
    font-weight: 800;
}

.app-brand strong,
.app-brand small {
    display: block;
    line-height: 1.05;
}

.app-brand small {
    margin-top: 0.25rem;
    color: var(--os2-slate-300);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
}

.app-nav {
    display: flex;
    flex: 1;
    min-height: 0;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-color: rgb(148 163 184 / 65%) transparent;
    scrollbar-width: thin;
}

.app-nav::-webkit-scrollbar {
    width: 0.45rem;
}

.app-nav::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgb(148 163 184 / 55%);
}

.app-nav-label {
    margin: 0.9rem 0.5rem 0.25rem;
    color: #94a3b8;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.app-nav-link {
    padding: 0.7rem 0.8rem;
    border-radius: 0.55rem;
    color: #dbeafe;
    text-decoration: none;
}

.app-nav-link:hover,
.app-nav-link.active {
    color: #fff;
    background: rgb(255 255 255 / 11%);
}

.app-nav-link.disabled {
    color: #64748b;
    cursor: not-allowed;
}

.app-sidebar-footer {
    flex: 0 0 auto;
    padding: 1rem 1.25rem;
    border-top: 1px solid rgb(255 255 255 / 10%);
    color: #94a3b8;
    font-size: 0.78rem;
}

.app-sidebar-footer strong {
    display: block;
    color: #fff;
}

.app-sidebar-backdrop {
    display: none;
}

.app-shell {
    min-height: 100vh;
    margin-left: var(--os2-sidebar-width);
}

.app-shell-public {
    margin-left: 0;
}

.app-topbar {
    position: sticky;
    top: 0;
    z-index: 1020;
    min-height: var(--os2-topbar-height);
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--os2-slate-200);
    background: rgb(255 255 255 / 94%);
    backdrop-filter: blur(10px);
}

.app-topbar-title {
    font-weight: 700;
}

.app-environment-badge {
    padding: 0.3rem 0.55rem;
    border: 1px solid var(--os2-slate-200);
    border-radius: 999px;
    color: var(--os2-slate-500);
    background: var(--os2-slate-50);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.app-main {
    width: 100%;
    max-width: 1600px;
    min-height: calc(100vh - 116px);
    margin: 0 auto;
    padding: 1.5rem;
}

.app-footer {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--os2-slate-200);
    color: var(--os2-slate-500);
    background: #fff;
    font-size: 0.8rem;
}

.page-heading {
    margin-bottom: 1.5rem;
}

.page-heading h1 {
    margin: 0;
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 750;
}

.page-heading p {
    max-width: 760px;
    margin: 0.45rem 0 0;
    color: var(--os2-slate-500);
}

.os2-card {
    height: 100%;
    padding: 1.25rem;
    border: 1px solid var(--os2-slate-200);
    border-radius: var(--os2-radius);
    background: #fff;
    box-shadow: var(--os2-shadow);
}

.os2-card-title {
    margin: 0 0 0.35rem;
    font-size: 1rem;
    font-weight: 700;
}

.os2-card-text {
    margin: 0;
    color: var(--os2-slate-500);
}

.os2-confirm-modal .modal-content {
    border: 0;
    border-radius: var(--os2-radius);
    box-shadow: 0 24px 70px rgb(15 23 42 / 24%);
}

.os2-confirm-modal .modal-header,
.os2-confirm-modal .modal-footer {
    border-color: var(--os2-slate-200);
}

.os2-confirm-message {
    color: var(--os2-slate-700);
    line-height: 1.6;
    overflow-wrap: anywhere;
    white-space: pre-line;
}

.os2-stat {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

.os2-stat-value {
    display: block;
    margin-top: 0.35rem;
    font-size: 1.8rem;
    font-weight: 750;
}

.os2-status-dot {
    display: inline-block;
    width: 0.55rem;
    height: 0.55rem;
    margin-right: 0.35rem;
    border-radius: 50%;
    background: var(--os2-success);
}

.table-responsive {
    border: 1px solid var(--os2-slate-200);
    border-radius: var(--os2-radius);
}

.table {
    margin-bottom: 0;
}

.table > :not(caption) > * > * {
    padding: 0.8rem 1rem;
}

.form-control:focus,
.form-select:focus,
.btn:focus-visible {
    border-color: var(--os2-blue-600);
    box-shadow: 0 0 0 0.22rem rgb(37 99 235 / 18%);
}

.foundation-hero {
    max-width: 920px;
    margin: 4vh auto 2rem;
}

.foundation-mark {
    display: grid;
    width: 4rem;
    height: 4rem;
    margin-bottom: 1.25rem;
    place-items: center;
    border-radius: 1rem;
    color: #fff;
    background: linear-gradient(135deg, var(--os2-blue-600), var(--os2-navy-900));
    box-shadow: var(--os2-shadow);
    font-weight: 800;
}

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

    .app-shell {
        margin-left: 0;
    }

    .sidebar-open .app-sidebar {
        transform: translateX(0);
    }

    .sidebar-open .app-sidebar-backdrop {
        position: fixed;
        inset: 0;
        z-index: 1030;
        display: block;
        width: 100%;
        border: 0;
        background: rgb(15 23 42 / 55%);
    }
}

@media (max-width: 575.98px) {
    .app-main {
        padding: 1rem;
    }

    .app-footer {
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}