:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --text-sidebar: #94a3b8;
    --text-sidebar-active: #ffffff;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --text-color: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --sidebar-width: 250px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* SIDEBAR */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.5rem 1rem;
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #ffffff;
    font-size: 1.1rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #1e293b;
}

.brand-icon {
    color: var(--primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1.5rem;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.75rem 1rem;
    color: var(--text-sidebar);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-item:hover {
    background-color: #1e293b;
    color: var(--text-sidebar-active);
}

.nav-item.active {
    background-color: var(--primary);
    color: #ffffff;
}

.sidebar-footer {
    padding-top: 1rem;
    border-top: 1px solid #1e293b;
    color: var(--text-sidebar);
    font-size: 0.9rem;
}

/* WRAPPER PRINCIPAL */
.content-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

/* TOPBAR */
.topbar {
    background-color: var(--bg-card);
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h1 {
    font-size: 1.5rem;
    color: #0f172a;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    background-color: #ecfdf5;
    color: var(--success);
}

.status-badge i {
    font-size: 0.6rem;
}

/* MAIN CONTENT AREA */
.main-content {
    padding: 2rem;
    flex-grow: 1;
}

/* CARDS Y CONTENEDORES GENÉRICOS */
.view-header {
    margin-bottom: 1.5rem;
}

.view-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.card h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.card .value {
    font-size: 1.8rem;
    font-weight: 700;
    color: #0f172a;
}

/* TABLAS Y BOTONES DE CONTROL */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.5rem;
}

.data-table th, .data-table td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: var(--bg-main);
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
}

.badge {
    padding: 0.25rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-active {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-inactive {
    background-color: #fee2e2;
    color: #991b1b;
}

.btn-action {
    padding: 0.4rem 0.75rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    margin-right: 0.3rem;
    transition: background-color 0.2s;
}

.btn-start { background-color: var(--success); color: white; }
.btn-stop { background-color: var(--danger); color: white; }
.btn-restart { background-color: var(--warning); color: white; }
.btn-secondary { background-color: #e2e8f0; color: #334155; padding: 0.5rem 1rem; border-radius: 6px; border: none; cursor: pointer; }

.btn-action:hover, .btn-secondary:hover { opacity: 0.9; }
.btn-action:disabled { opacity: 0.5; cursor: not-allowed; }