:root {
    --primary: #1e3a5f;
    --secondary: #2e6da4;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --border: #d9e2ec;
    --text: #1f2937;
    --text-muted: #64748b;
    --success-bg: #d1fae5;
    --success-fg: #065f46;
    --warning-bg: #fef3c7;
    --warning-fg: #92400e;
    --danger-bg: #fee2e2;
    --danger-fg: #991b1b;
    --info-bg: #dbeafe;
    --info-fg: #1d4ed8;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: linear-gradient(180deg, #edf4fb 0%, #f8fafc 100%);
    color: var(--text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 260px 1fr;
}

.sidebar {
    background: linear-gradient(180deg, var(--primary) 0%, #16304d 100%);
    color: #fff;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.2rem;
    font-weight: 700;
}

.brand-mark {
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 0.7rem;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.14);
}

.nav-list {
    display: grid;
    gap: 0.35rem;
}

.nav-button {
    border: 0;
    border-radius: 0.8rem;
    background: transparent;
    color: rgba(255, 255, 255, 0.82);
    text-align: left;
    padding: 0.8rem 0.9rem;
    font-weight: 600;
}

.nav-button:hover,
.nav-button.active {
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
}

.sidebar-footer {
    margin-top: auto;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.72);
}

.main-pane {
    padding: 1.5rem;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.title-block h1 {
    margin: 0;
    color: var(--primary);
    font-size: 1.8rem;
}

.title-block p {
    margin: 0.3rem 0 0;
    color: var(--text-muted);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 999px;
    padding: 0.55rem 0.9rem;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    font-size: 0.92rem;
}

.status-dot {
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 999px;
    background: #9ca3af;
}

.status-dot.connected {
    background: #10b981;
}

.grid-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.card,
.stat-card,
.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
}

.stat-card {
    padding: 1rem;
}

.stat-card h2 {
    margin: 0;
    font-size: 2rem;
    color: var(--primary);
}

.stat-card p {
    margin: 0.4rem 0 0;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.78rem;
}

.page-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 1rem;
}

.panel {
    padding: 1rem;
}

.panel h3,
.panel h4 {
    margin-top: 0;
    color: var(--primary);
}

.table-wrap {
    overflow: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 0.75rem 0.7rem;
    border-bottom: 1px solid #e5e7eb;
    font-size: 0.92rem;
    vertical-align: top;
}

th {
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-size: 0.75rem;
    background: var(--surface-muted);
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.btn-brand {
    border: 0;
    border-radius: 0.75rem;
    padding: 0.7rem 1rem;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}

.btn-brand:hover {
    background: var(--secondary);
}

.btn-outline-brand {
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 0.7rem 1rem;
    background: var(--surface);
    color: var(--primary);
    font-weight: 600;
}

.action-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.9rem;
}

.field {
    display: grid;
    gap: 0.35rem;
}

.field.full {
    grid-column: 1 / -1;
}

.field label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
}

.field input,
.field select,
.field textarea {
    width: 100%;
    border: 1px solid #cbd5e1;
    border-radius: 0.75rem;
    padding: 0.75rem 0.85rem;
    font: inherit;
    background: #fff;
}

.field textarea {
    min-height: 110px;
    resize: vertical;
}

.check-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding-top: 1.8rem;
}

.badge-tone {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 0.25rem 0.7rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: capitalize;
}

.tone-low,
.tone-pass,
.tone-current,
.tone-completed,
.tone-resolved,
.tone-closed {
    background: var(--success-bg);
    color: var(--success-fg);
}

.tone-medium,
.tone-conditional,
.tone-investigating,
.tone-in_progress {
    background: var(--warning-bg);
    color: var(--warning-fg);
}

.tone-high,
.tone-open,
.tone-pending {
    background: var(--info-bg);
    color: var(--info-fg);
}

.tone-critical,
.tone-fail,
.tone-overdue,
.tone-expired {
    background: var(--danger-bg);
    color: var(--danger-fg);
}

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

.alert-inline {
    border-radius: 0.8rem;
    padding: 0.8rem 1rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
}

.alert-inline.success {
    background: var(--success-bg);
    color: var(--success-fg);
}

.alert-inline.error {
    background: var(--danger-bg);
    color: var(--danger-fg);
}

@media (max-width: 960px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .page-grid {
        grid-template-columns: 1fr;
    }
}