:root {
    --bg: #0b1020;
    --sidebar: #11182b;
    --panel: #151e33;
    --panel-light: #1b2640;
    --border: #28344f;
    --text: #f4f7ff;
    --muted: #8793ad;
    --primary: #4f8cff;
    --success: #28c76f;
    --warning: #ffb020;
    --danger: #ef5350;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
}

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

.sidebar {
    position: fixed;
    width: 250px;
    height: 100vh;
    background: var(--sidebar);
    border-right: 1px solid var(--border);
    padding: 24px 18px;
}

.brand {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 40px;
}

.brand-icon {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    background: var(--primary);
    border-radius: 12px;
    font-size: 22px;
    font-weight: bold;
}

.brand h1 {
    margin: 0;
    font-size: 17px;
}

.brand p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 12px;
}

nav {
    display: grid;
    gap: 8px;
}

nav a {
    padding: 13px 14px;
    border-radius: 9px;
    color: var(--muted);
    text-decoration: none;
}

nav a:hover,
nav a.active {
    background: var(--panel-light);
    color: var(--text);
}

.mode-card {
    position: absolute;
    right: 18px;
    bottom: 24px;
    left: 18px;
    padding: 15px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.mode-card span,
.mode-card small {
    display: block;
    color: var(--muted);
}

.mode-card strong {
    display: block;
    margin: 7px 0;
    color: var(--warning);
}

.main-content {
    width: calc(100% - 250px);
    margin-left: 250px;
    padding: 28px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 26px;
}

.topbar h2 {
    margin: 0;
}

.topbar p {
    margin: 7px 0 0;
    color: var(--muted);
}

.system-status {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 10px 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.status-dot {
    width: 9px;
    height: 9px;
    background: var(--success);
    border-radius: 50%;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(170px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    padding: 20px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
}

.stat-card span {
    color: var(--muted);
    font-size: 13px;
}

.stat-card strong {
    display: block;
    margin: 12px 0 7px;
    font-size: 26px;
}

.stat-card small {
    color: var(--muted);
}

.stat-card.success {
    border-color: rgba(40, 199, 111, 0.4);
}

.stat-card.warning {
    border-color: rgba(255, 176, 32, 0.4);
}

.panel {
    margin-bottom: 24px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
}

.panel-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.panel-header h3 {
    margin: 0;
}

.panel-header p {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 13px;
}

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

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

th,
td {
    padding: 15px 18px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}

th {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
}

td {
    font-size: 14px;
}

.mono {
    font-family: monospace;
}

.status,
.badge {
    display: inline-block;
    padding: 6px 9px;
    border-radius: 7px;
    font-size: 11px;
    font-weight: bold;
}

.status-would_release,
.badge.success {
    color: var(--success);
    background: rgba(40, 199, 111, 0.13);
}

.status-review_required,
.badge.warning {
    color: var(--warning);
    background: rgba(255, 176, 32, 0.13);
}

.badge.danger {
    color: var(--danger);
    background: rgba(239, 83, 80, 0.13);
}

.status-new,
.status-payment_pending,
.status-buyer_marked_paid {
    color: var(--primary);
    background: rgba(79, 140, 255, 0.13);
}

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.activity-list {
    padding: 0 20px;
}

.activity-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.activity-item:last-child {
    border-bottom: 0;
}

.activity-item p {
    margin: 6px 0;
}

.activity-item small {
    color: var(--muted);
}

.empty {
    padding: 25px;
    color: var(--muted);
    text-align: center;
}

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 850px) {
    .sidebar {
        position: static;
        width: 100%;
        height: auto;
    }

    .app-shell {
        display: block;
    }

    .main-content {
        width: 100%;
        margin-left: 0;
        padding: 16px;
    }

    .sidebar nav,
    .mode-card {
        display: none;
    }

    .brand {
        margin-bottom: 0;
    }

    .two-column,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
        gap: 15px;
    }
}