:root {
    --surface: #171b22;
    --surface-soft: #202631;
    --line: #303846;
    --text-soft: #aeb7c5;
}

body {
    min-height: 100vh;
}

.admin-shell {
    background: #0f1319;
    color: #f4f7fb;
    display: grid;
    grid-template-columns: 280px 1fr;
}

.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-height: 100vh;
    padding: 24px;
    position: sticky;
    top: 0;
}

.brand {
    color: #fff;
    font-size: 1.05rem;
    font-weight: 700;
    text-decoration: none;
}

.sidebar .nav-link {
    border-radius: 8px;
    color: var(--text-soft);
}

.sidebar .nav-link.active,
.sidebar .nav-link:hover {
    background: #2b65f6;
    color: #fff;
}

.content {
    padding: 32px;
}

.panel,
.metric,
.login-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.panel {
    padding: 18px;
}

.metric {
    display: grid;
    gap: 10px;
    min-height: 100%;
    padding: 22px;
}

.metric span {
    color: var(--text-soft);
}

.metric strong {
    font-size: 2.2rem;
}

.filters {
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr 180px auto;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
}

.form-grid {
    display: grid;
    gap: 16px;
}

.login-screen {
    align-items: center;
    background: #0f1319;
    color: #f4f7fb;
    display: flex;
    justify-content: center;
    padding: 24px;
}

.login-card {
    max-width: 420px;
    padding: 28px;
    width: 100%;
}

.code-area {
    font-family: Consolas, Monaco, monospace;
    min-height: 110px;
}

@media (max-width: 900px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        min-height: auto;
        position: static;
    }

    .content {
        padding: 20px;
    }

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