:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --warning-color: #eab308;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --background-color: #f8fafc;
    --sidebar-width: 280px;
    --header-height: 60px;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: #1e293b;
    min-height: 100vh;
}

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

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    background-color: white;
    box-shadow: 2px 0 8px rgba(0,0,0,0.05);
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.sidebar-logo {
    max-height: 40px;
    display: block;
    margin: 0 auto;
}

.sidebar-nav {
    padding: 1.5rem 0;
}

.nav-item {
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    color: var(--secondary-color);
    text-decoration: none;
    transition: all 0.2s ease;
}

.nav-item:hover {
    background-color: #f1f5f9;
    color: var(--primary-color);
}

.nav-item.active {
    background-color: #eef2ff;
    color: var(--primary-color);
    font-weight: 500;
}

.nav-item i {
    margin-right: 0.75rem;
    width: 20px;
    text-align: center;
}

/* Main Content Styles */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
}

/* Cards and Containers */
.card {
    background-color: white;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

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

.modern-table th {
    background-color: #f8fafc;
    padding: 1rem;
    text-align: left;
    font-weight: 500;
    color: var(--secondary-color);
}

.modern-table td {
    padding: 1rem;
    border-top: 1px solid #e2e8f0;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    border: none;
}

.btn i {
    margin-right: 0.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

/* Status Badges */
.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    display: inline-block;
}

.status-nuevo { background-color: #dcfce7; color: #166534; }
.status-seguimiento { background-color: #fef9c3; color: #854d0e; }
.status-convertido { background-color: #dbeafe; color: #1e40af; }
.status-cerrado { background-color: #fee2e2; color: #991b1b; }

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
        position: fixed;
        top: 1rem;
        left: 1rem;
        z-index: 101;
        background-color: white;
        padding: 0.5rem;
        border-radius: 0.5rem;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
}

@media (max-width: 640px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
}