:root {
    color-scheme: light;
    --surface-page: #f9f9f7;
    --surface-card: #fcfcfb;
    --text-primary: #0b0b0b;
    --text-secondary: #52514e;
    --text-muted: #898781;
    --border: rgba(11, 11, 11, 0.10);
    --grid: #e1e0d9;
    --accent: #2a78d6;
    --accent-orange: #eb6834;
    --status-good: #0ca30c;
    --status-warning: #fab219;
    --status-serious: #ec835a;
    --status-critical: #d03b3b;
    --status-good-bg: rgba(12, 163, 12, 0.12);
    --status-warning-bg: rgba(250, 178, 25, 0.16);
    --status-critical-bg: rgba(208, 59, 59, 0.10);
    --shadow: 0 1px 2px rgba(11, 11, 11, 0.06), 0 4px 12px rgba(11, 11, 11, 0.04);
}

@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
        --surface-page: #0d0d0d;
        --surface-card: #1a1a19;
        --text-primary: #ffffff;
        --text-secondary: #c3c2b7;
        --border: rgba(255, 255, 255, 0.10);
        --grid: #2c2c2a;
        --accent: #3987e5;
        --accent-orange: #d95926;
        --status-good-bg: rgba(12, 163, 12, 0.18);
        --status-warning-bg: rgba(250, 178, 25, 0.14);
        --status-critical-bg: rgba(208, 59, 59, 0.16);
        --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.3);
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--surface-page);
    color: var(--text-primary);
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

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

.sidebar {
    width: 15rem;
    flex-shrink: 0;
    background: var(--surface-card);
    border-right: 1px solid var(--border);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-brand {
    font-size: 1.05rem;
    font-weight: 700;
    padding: 0 0.5rem;
}

.sidebar-nav {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.sidebar-nav a {
    display: block;
    padding: 0.5rem 0.6rem;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.sidebar-nav a:hover {
    background: var(--surface-page);
    text-decoration: none;
}

.sidebar-nav a.active {
    background: var(--surface-page);
    color: var(--text-primary);
    font-weight: 600;
}

.sidebar-section-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    padding: 0 0.6rem;
    margin: 0.5rem 0 0.15rem;
}

.sidebar-footer {
    margin-top: auto;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.main {
    flex: 1;
    padding: 2rem 2.5rem 4rem;
    max-width: 72rem;
}

.page-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
}

.page-header h1 {
    margin: 0;
    font-size: 1.5rem;
}

.page-header .meta {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.kpi-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (max-width: 45rem) {
    .kpi-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 30rem) {
    .kpi-row {
        grid-template-columns: 1fr;
    }

    .kpi-tile .value {
        font-size: 1.5rem;
    }
}

.kpi-tile {
    background: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow);
}

.kpi-tile .value {
    font-size: 1.9rem;
    font-weight: 700;
    line-height: 1.1;
}

.kpi-tile .label {
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-top: 0.25rem;
}

.card {
    background: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.75rem;
}

.card h2 {
    margin: 0 0 1rem;
    font-size: 1.05rem;
}

.card h3 {
    margin: 1.75rem 0 0.75rem;
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.card h3:first-of-type {
    margin-top: 0;
}

.chart-box {
    position: relative;
    height: 16rem;
}

.chart-box.chart-box--short {
    height: 6rem;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
    gap: 1rem;
}

.app-card {
    background: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.1rem 1.25rem;
    box-shadow: var(--shadow);
    display: block;
    color: var(--text-primary);
}

.app-card:hover {
    border-color: var(--accent);
    text-decoration: none;
}

.app-card .app-card-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.app-card .app-card-meta {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.table-scroll {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th, td {
    text-align: left;
    padding: 0.55rem 0.6rem;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

td.actions {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

button, .btn {
    font: inherit;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--surface-page);
    color: var(--text-primary);
    border-radius: 0.5rem;
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
}

button:hover {
    border-color: var(--accent);
}

button.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.badge {
    display: inline-block;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-new {
    background: var(--grid);
    color: var(--text-secondary);
}

.badge-addressing {
    background: var(--status-warning-bg);
    color: #8a5a00;
}

@media (prefers-color-scheme: dark) {
    .badge-addressing {
        color: var(--status-warning);
    }
}

.badge-dismissed {
    background: var(--surface-page);
    color: var(--text-muted);
}

.empty-state {
    color: var(--text-muted);
    padding: 1rem 0;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: 22rem;
    background: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.login-card h1 {
    font-size: 1.2rem;
    margin: 0 0 1.25rem;
}

.login-card label {
    display: block;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0.9rem 0 0.3rem;
}

.login-card input {
    width: 100%;
    padding: 0.5rem 0.65rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--surface-page);
    color: var(--text-primary);
    font: inherit;
}

.login-card button {
    width: 100%;
    margin-top: 1.25rem;
}

.alert {
    padding: 0.6rem 0.8rem;
    border-radius: 0.5rem;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.alert-danger {
    background: var(--status-critical-bg);
    color: var(--status-critical);
}

[data-tooltip] {
    position: relative;
    cursor: help;
}

.kpi-tile .label[data-tooltip],
th[data-tooltip] {
    border-bottom: 1px dotted var(--text-muted);
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 0.4rem);
    left: 0;
    background: var(--text-primary);
    color: var(--surface-card);
    padding: 0.4rem 0.6rem;
    border-radius: 0.4rem;
    font-size: 0.78rem;
    font-weight: 400;
    line-height: 1.35;
    white-space: normal;
    width: max-content;
    max-width: 16rem;
    opacity: 0;
    transform: translateY(0.25rem);
    pointer-events: none;
    transition: opacity 0.12s ease, transform 0.12s ease;
    z-index: 20;
    box-shadow: var(--shadow);
}

[data-tooltip]:hover::after,
[data-tooltip]:focus-visible::after {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 60rem) {
    .layout {
        flex-direction: column;
    }

    .sidebar {
        width: auto;
        flex-direction: row;
        align-items: center;
        overflow-x: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .sidebar-brand,
    .sidebar-nav,
    .sidebar-nav li,
    .sidebar-section-label {
        flex-shrink: 0;
        white-space: nowrap;
    }

    .sidebar-nav {
        flex-direction: row;
    }

    .sidebar > div {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .sidebar-footer {
        display: none;
    }

    .main {
        padding: 1.5rem;
    }
}

@media (max-width: 30rem) {
    .main {
        padding: 1rem;
        max-width: 100%;
    }

    .card {
        padding: 1rem;
    }

    .page-header h1 {
        font-size: 1.25rem;
    }

    .login-page {
        padding: 1.5rem;
    }

    .login-card {
        width: 100%;
        padding: 1.5rem;
    }
}

@media (max-width: 40rem) {
    .table-scroll table,
    .table-scroll thead,
    .table-scroll tbody,
    .table-scroll th,
    .table-scroll td,
    .table-scroll tr {
        display: block;
    }

    .table-scroll {
        overflow-x: visible;
    }

    .table-scroll thead tr {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0 0 0 0);
    }

    .table-scroll tr {
        margin-bottom: 0.85rem;
        border: 1px solid var(--border);
        border-radius: 0.75rem;
        padding: 0.5rem 0.85rem;
        background: var(--surface-card);
        box-shadow: var(--shadow);
    }

    .table-scroll tr:last-child {
        margin-bottom: 0;
    }

    .table-scroll td {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 0.75rem;
        border-bottom: 1px solid var(--border);
        padding: 0.55rem 0;
        text-align: right;
    }

    .table-scroll td:last-child {
        border-bottom: none;
    }

    .table-scroll td::before {
        content: attr(data-label);
        font-weight: 600;
        font-size: 0.78rem;
        color: var(--text-muted);
        text-align: left;
        flex-shrink: 0;
    }

    .table-scroll td.actions {
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .table-scroll td.actions::before {
        display: none;
    }

    .table-scroll td form {
        flex-wrap: wrap;
        justify-content: flex-end;
    }
}